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_MIN_PERIODIC_LEN_MIN 0x02 115 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 116 #define GAP_INQUIRY_STATE_IDLE 0x00 117 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 118 #define GAP_INQUIRY_STATE_ACTIVE 0x81 119 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 120 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 121 #define GAP_INQUIRY_STATE_PERIODIC 0x84 122 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // 140 // compact storage of relevant supported HCI Commands. 141 // X-Macro below provides enumeration and mapping table into the supported 142 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 143 // 144 145 // format: command name, byte offset, bit nr in 64-byte supported commands 146 // currently stored in 32-bit variable 147 #define SUPPORTED_HCI_COMMANDS \ 148 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 149 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 150 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 151 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 152 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 153 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 154 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 155 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 156 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 157 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 158 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 159 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 160 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 161 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 162 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 163 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 164 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 165 166 // enumerate supported commands 167 #define X(name, offset, bit) name, 168 enum { 169 SUPPORTED_HCI_COMMANDS 170 SUPPORTED_HCI_COMMANDS_COUNT 171 }; 172 #undef X 173 174 // prototypes 175 #ifdef ENABLE_CLASSIC 176 static void hci_update_scan_enable(void); 177 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 178 static int hci_local_ssp_activated(void); 179 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 180 static bool hci_ssp_supported(hci_connection_t * connection); 181 static void hci_notify_if_sco_can_send_now(void); 182 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 183 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 184 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 185 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 186 static void hci_connection_timestamp(hci_connection_t *connection); 187 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 188 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 189 #endif 190 191 static int hci_power_control_on(void); 192 static void hci_power_control_off(void); 193 static void hci_state_reset(void); 194 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 195 static void hci_emit_transport_packet_sent(void); 196 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 197 static void hci_emit_nr_connections_changed(void); 198 static void hci_emit_hci_open_failed(void); 199 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 200 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 201 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 202 static void hci_run(void); 203 static int hci_is_le_connection(hci_connection_t * connection); 204 205 #ifdef ENABLE_CLASSIC 206 static int hci_have_usb_transport(void); 207 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 208 #endif 209 210 #ifdef ENABLE_BLE 211 static void hci_whitelist_free(void); 212 #ifdef ENABLE_LE_CENTRAL 213 // called from test/ble_client/advertising_data_parser.c 214 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 215 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 216 static hci_connection_t * gap_get_outgoing_connection(void); 217 static void hci_le_scan_stop(void); 218 static bool hci_run_general_gap_le(void); 219 #endif 220 #ifdef ENABLE_LE_PERIPHERAL 221 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 222 static void hci_periodic_advertiser_list_free(void); 223 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 224 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 225 #endif /* ENABLE_LE_PERIPHERAL */ 226 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 227 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle); 228 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 229 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle); 230 static void hci_iso_stream_requested_finalize(void); 231 static void hci_iso_stream_requested_confirm(void); 232 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 233 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 234 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 235 static void hci_emit_big_terminated(const le_audio_big_t * big); 236 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 237 #endif /* ENABLE_BLE */ 238 239 // the STACK is here 240 #ifndef HAVE_MALLOC 241 static hci_stack_t hci_stack_static; 242 #endif 243 static hci_stack_t * hci_stack = NULL; 244 245 #ifdef ENABLE_CLASSIC 246 // default name 247 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 248 249 // test helper 250 static uint8_t disable_l2cap_timeouts = 0; 251 #endif 252 253 // reset connection state on create and on reconnect 254 // don't overwrite addr, con handle, role 255 static void hci_connection_init(hci_connection_t * conn){ 256 conn->authentication_flags = AUTH_FLAG_NONE; 257 conn->bonding_flags = 0; 258 conn->requested_security_level = LEVEL_0; 259 #ifdef ENABLE_CLASSIC 260 conn->request_role = HCI_ROLE_INVALID; 261 conn->sniff_subrating_max_latency = 0xffff; 262 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 263 conn->link_key_type = INVALID_LINK_KEY; 264 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 265 btstack_run_loop_set_timer_context(&conn->timeout, conn); 266 hci_connection_timestamp(conn); 267 #endif 268 conn->acl_recombination_length = 0; 269 conn->acl_recombination_pos = 0; 270 conn->num_packets_sent = 0; 271 272 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 273 #ifdef ENABLE_BLE 274 conn->le_phy_update_all_phys = 0xff; 275 #endif 276 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 277 conn->le_max_tx_octets = 27; 278 #endif 279 #ifdef ENABLE_CLASSIC_PAIRING_OOB 280 conn->classic_oob_c_192 = NULL; 281 conn->classic_oob_r_192 = NULL; 282 conn->classic_oob_c_256 = NULL; 283 conn->classic_oob_r_256 = NULL; 284 #endif 285 } 286 287 /** 288 * create connection for given address 289 * 290 * @return connection OR NULL, if no memory left 291 */ 292 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 293 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 294 295 hci_connection_t * conn = btstack_memory_hci_connection_get(); 296 if (!conn) return NULL; 297 hci_connection_init(conn); 298 299 bd_addr_copy(conn->address, addr); 300 conn->address_type = addr_type; 301 conn->con_handle = HCI_CON_HANDLE_INVALID; 302 conn->role = HCI_ROLE_INVALID; 303 304 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 305 306 return conn; 307 } 308 309 310 /** 311 * get le connection parameter range 312 * 313 * @return le connection parameter range struct 314 */ 315 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 316 *range = hci_stack->le_connection_parameter_range; 317 } 318 319 /** 320 * set le connection parameter range 321 * 322 */ 323 324 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 325 hci_stack->le_connection_parameter_range = *range; 326 } 327 328 /** 329 * @brief Test if connection parameters are inside in existing rage 330 * @param conn_interval_min (unit: 1.25ms) 331 * @param conn_interval_max (unit: 1.25ms) 332 * @param conn_latency 333 * @param supervision_timeout (unit: 10ms) 334 * @return 1 if included 335 */ 336 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){ 337 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 338 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 339 340 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 341 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 342 343 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 344 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 345 346 return 1; 347 } 348 349 /** 350 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 351 * @note: default: 1 352 * @param max_peripheral_connections 353 */ 354 #ifdef ENABLE_LE_PERIPHERAL 355 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 356 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 357 } 358 #endif 359 360 /** 361 * get hci connections iterator 362 * 363 * @return hci connections iterator 364 */ 365 366 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 367 btstack_linked_list_iterator_init(it, &hci_stack->connections); 368 } 369 370 /** 371 * get connection for a given handle 372 * 373 * @return connection OR NULL, if not found 374 */ 375 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 376 btstack_linked_list_iterator_t it; 377 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 378 while (btstack_linked_list_iterator_has_next(&it)){ 379 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 380 if ( item->con_handle == con_handle ) { 381 return item; 382 } 383 } 384 return NULL; 385 } 386 387 /** 388 * get connection for given address 389 * 390 * @return connection OR NULL, if not found 391 */ 392 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 393 btstack_linked_list_iterator_t it; 394 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 395 while (btstack_linked_list_iterator_has_next(&it)){ 396 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 397 if (connection->address_type != addr_type) continue; 398 if (memcmp(addr, connection->address, 6) != 0) continue; 399 return connection; 400 } 401 return NULL; 402 } 403 404 #ifdef ENABLE_CLASSIC 405 406 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 407 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 408 } 409 410 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 411 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 412 } 413 414 #ifdef ENABLE_SCO_OVER_HCI 415 static int hci_number_sco_connections(void){ 416 int connections = 0; 417 btstack_linked_list_iterator_t it; 418 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 419 while (btstack_linked_list_iterator_has_next(&it)){ 420 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 421 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 422 connections++; 423 } 424 return connections; 425 } 426 #endif 427 428 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 429 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 430 #ifdef HAVE_EMBEDDED_TICK 431 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 432 // connections might be timed out 433 hci_emit_l2cap_check_timeout(connection); 434 } 435 #else 436 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 437 // connections might be timed out 438 hci_emit_l2cap_check_timeout(connection); 439 } 440 #endif 441 } 442 443 static void hci_connection_timestamp(hci_connection_t *connection){ 444 #ifdef HAVE_EMBEDDED_TICK 445 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 446 #else 447 connection->timestamp = btstack_run_loop_get_time_ms(); 448 #endif 449 } 450 451 /** 452 * add authentication flags and reset timer 453 * @note: assumes classic connection 454 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 455 */ 456 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 457 bd_addr_t addr; 458 reverse_bd_addr(bd_addr, addr); 459 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 460 if (conn) { 461 connectionSetAuthenticationFlags(conn, flags); 462 hci_connection_timestamp(conn); 463 } 464 } 465 466 static bool hci_pairing_active(hci_connection_t * hci_connection){ 467 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 468 } 469 470 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 471 if (hci_pairing_active(hci_connection)) return; 472 if (ssp){ 473 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 474 } else { 475 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 476 } 477 // if we are initiator, we have sent an HCI Authenticate Request 478 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 479 480 // if we are responder, use minimal service security level as required level 481 if (!initiator){ 482 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); 483 } 484 485 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 486 487 uint8_t event[12]; 488 event[0] = GAP_EVENT_PAIRING_STARTED; 489 event[1] = 10; 490 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 491 reverse_bd_addr(hci_connection->address, &event[4]); 492 event[10] = (uint8_t) ssp; 493 event[11] = (uint8_t) initiator; 494 hci_emit_event(event, sizeof(event), 1); 495 } 496 497 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 498 hci_connection->requested_security_level = LEVEL_0; 499 if (!hci_pairing_active(hci_connection)) return; 500 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 501 #ifdef ENABLE_CLASSIC_PAIRING_OOB 502 hci_connection->classic_oob_c_192 = NULL; 503 hci_connection->classic_oob_r_192 = NULL; 504 hci_connection->classic_oob_c_256 = NULL; 505 hci_connection->classic_oob_r_256 = NULL; 506 #endif 507 log_info("pairing complete, status %02x", status); 508 509 uint8_t event[11]; 510 event[0] = GAP_EVENT_PAIRING_COMPLETE; 511 event[1] = 9; 512 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 513 reverse_bd_addr(hci_connection->address, &event[4]); 514 event[10] = status; 515 hci_emit_event(event, sizeof(event), 1); 516 517 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 518 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 519 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 520 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 521 hci_connection->bonding_status = status; 522 } 523 } 524 525 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 526 hci_connection_t * conn = hci_connection_for_handle(handle); 527 if (!conn) return false; 528 return hci_pairing_active(conn); 529 } 530 531 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 532 if (!hci_stack->link_key_db) return; 533 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 534 hci_stack->link_key_db->delete_link_key(addr); 535 } 536 537 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 538 if (!hci_stack->link_key_db) return; 539 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 540 hci_stack->link_key_db->put_link_key(addr, link_key, type); 541 } 542 543 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 544 if (!hci_stack->link_key_db) return false; 545 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 546 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 547 return result; 548 } 549 550 void gap_delete_all_link_keys(void){ 551 bd_addr_t addr; 552 link_key_t link_key; 553 link_key_type_t type; 554 btstack_link_key_iterator_t it; 555 int ok = gap_link_key_iterator_init(&it); 556 if (!ok) { 557 log_error("could not initialize iterator"); 558 return; 559 } 560 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 561 gap_drop_link_key_for_bd_addr(addr); 562 } 563 gap_link_key_iterator_done(&it); 564 } 565 566 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 567 if (!hci_stack->link_key_db) return 0; 568 if (!hci_stack->link_key_db->iterator_init) return 0; 569 return hci_stack->link_key_db->iterator_init(it); 570 } 571 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){ 572 if (!hci_stack->link_key_db) return 0; 573 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 574 } 575 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 576 if (!hci_stack->link_key_db) return; 577 hci_stack->link_key_db->iterator_done(it); 578 } 579 #endif 580 581 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 582 switch (address_type){ 583 case BD_ADDR_TYPE_LE_PUBLIC: 584 case BD_ADDR_TYPE_LE_RANDOM: 585 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 586 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 587 return true; 588 default: 589 return false; 590 } 591 } 592 593 static int hci_is_le_connection(hci_connection_t * connection){ 594 return hci_is_le_connection_type(connection->address_type); 595 } 596 597 /** 598 * count connections 599 */ 600 static int nr_hci_connections(void){ 601 int count = 0; 602 btstack_linked_item_t *it; 603 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 604 count++; 605 } 606 return count; 607 } 608 609 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 610 611 unsigned int num_packets_sent_classic = 0; 612 unsigned int num_packets_sent_le = 0; 613 614 btstack_linked_item_t *it; 615 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 616 hci_connection_t * connection = (hci_connection_t *) it; 617 if (hci_is_le_connection(connection)){ 618 num_packets_sent_le += connection->num_packets_sent; 619 } 620 if (connection->address_type == BD_ADDR_TYPE_ACL){ 621 num_packets_sent_classic += connection->num_packets_sent; 622 } 623 } 624 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 625 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 626 int free_slots_le = 0; 627 628 if (free_slots_classic < 0){ 629 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); 630 return 0; 631 } 632 633 if (hci_stack->le_acl_packets_total_num){ 634 // if we have LE slots, they are used 635 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 636 if (free_slots_le < 0){ 637 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); 638 return 0; 639 } 640 } else { 641 // otherwise, classic slots are used for LE, too 642 free_slots_classic -= num_packets_sent_le; 643 if (free_slots_classic < 0){ 644 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); 645 return 0; 646 } 647 } 648 649 switch (address_type){ 650 case BD_ADDR_TYPE_UNKNOWN: 651 log_error("hci_number_free_acl_slots: unknown address type"); 652 return 0; 653 654 case BD_ADDR_TYPE_ACL: 655 return (uint16_t) free_slots_classic; 656 657 default: 658 if (hci_stack->le_acl_packets_total_num > 0){ 659 return (uint16_t) free_slots_le; 660 } 661 return (uint16_t) free_slots_classic; 662 } 663 } 664 665 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 666 // get connection type 667 hci_connection_t * connection = hci_connection_for_handle(con_handle); 668 if (!connection){ 669 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 670 return 0; 671 } 672 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 673 } 674 675 #ifdef ENABLE_CLASSIC 676 static int hci_number_free_sco_slots(void){ 677 unsigned int num_sco_packets_sent = 0; 678 btstack_linked_item_t *it; 679 if (hci_stack->synchronous_flow_control_enabled){ 680 // explicit flow control 681 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 682 hci_connection_t * connection = (hci_connection_t *) it; 683 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 684 num_sco_packets_sent += connection->num_packets_sent; 685 } 686 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 687 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 688 return 0; 689 } 690 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 691 } else { 692 // implicit flow control -- TODO 693 int num_ready = 0; 694 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 695 hci_connection_t * connection = (hci_connection_t *) it; 696 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 697 if (connection->sco_tx_ready == 0) continue; 698 num_ready++; 699 } 700 return num_ready; 701 } 702 } 703 #endif 704 705 // only used to send HCI Host Number Completed Packets 706 static int hci_can_send_comand_packet_transport(void){ 707 if (hci_stack->hci_packet_buffer_reserved) return 0; 708 709 // check for async hci transport implementations 710 if (hci_stack->hci_transport->can_send_packet_now){ 711 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 712 return 0; 713 } 714 } 715 return 1; 716 } 717 718 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 719 bool hci_can_send_command_packet_now(void){ 720 if (hci_can_send_comand_packet_transport() == 0) return false; 721 return hci_stack->num_cmd_packets > 0u; 722 } 723 724 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 725 // check for async hci transport implementations 726 if (!hci_stack->hci_transport->can_send_packet_now) return true; 727 return hci_stack->hci_transport->can_send_packet_now(packet_type); 728 } 729 730 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 731 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 732 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 733 } 734 735 bool hci_can_send_acl_le_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_LE_PUBLIC); 738 } 739 740 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 741 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 742 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 743 } 744 745 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 746 if (hci_stack->hci_packet_buffer_reserved) return false; 747 return hci_can_send_prepared_acl_packet_now(con_handle); 748 } 749 750 #ifdef ENABLE_CLASSIC 751 bool hci_can_send_acl_classic_packet_now(void){ 752 if (hci_stack->hci_packet_buffer_reserved) return false; 753 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 754 } 755 756 bool hci_can_send_prepared_sco_packet_now(void){ 757 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 758 if (hci_have_usb_transport()){ 759 return hci_stack->sco_can_send_now; 760 } else { 761 return hci_number_free_sco_slots() > 0; 762 } 763 } 764 765 bool hci_can_send_sco_packet_now(void){ 766 if (hci_stack->hci_packet_buffer_reserved) return false; 767 return hci_can_send_prepared_sco_packet_now(); 768 } 769 770 void hci_request_sco_can_send_now_event(void){ 771 hci_stack->sco_waiting_for_can_send_now = 1; 772 hci_notify_if_sco_can_send_now(); 773 } 774 #endif 775 776 // used for internal checks in l2cap.c 777 bool hci_is_packet_buffer_reserved(void){ 778 return hci_stack->hci_packet_buffer_reserved; 779 } 780 781 // reserves outgoing packet buffer. 782 // @return 1 if successful 783 bool hci_reserve_packet_buffer(void){ 784 if (hci_stack->hci_packet_buffer_reserved) { 785 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 786 return false; 787 } 788 hci_stack->hci_packet_buffer_reserved = true; 789 return true; 790 } 791 792 void hci_release_packet_buffer(void){ 793 hci_stack->hci_packet_buffer_reserved = false; 794 } 795 796 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 797 static int hci_transport_synchronous(void){ 798 return hci_stack->hci_transport->can_send_packet_now == NULL; 799 } 800 801 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 802 803 // 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); 804 805 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 806 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 807 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 808 max_acl_data_packet_length = hci_stack->le_data_packets_length; 809 } 810 811 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 812 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 813 max_acl_data_packet_length = connection->le_max_tx_octets; 814 } 815 #endif 816 817 log_debug("hci_send_acl_packet_fragments entered"); 818 819 uint8_t status = ERROR_CODE_SUCCESS; 820 // multiple packets could be send on a synchronous HCI transport 821 while (true){ 822 823 log_debug("hci_send_acl_packet_fragments loop entered"); 824 825 // get current data 826 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 827 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 828 bool more_fragments = false; 829 830 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 831 if (current_acl_data_packet_length > max_acl_data_packet_length){ 832 more_fragments = true; 833 current_acl_data_packet_length = max_acl_data_packet_length; 834 } 835 836 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 837 if (acl_header_pos > 0u){ 838 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 839 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 840 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 841 } 842 843 // update header len 844 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 845 846 // count packet 847 connection->num_packets_sent++; 848 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 849 850 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 851 if (more_fragments){ 852 // update start of next fragment to send 853 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 854 } else { 855 // done 856 hci_stack->acl_fragmentation_pos = 0; 857 hci_stack->acl_fragmentation_total_size = 0; 858 } 859 860 // send packet 861 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 862 const int size = current_acl_data_packet_length + 4; 863 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 864 hci_stack->acl_fragmentation_tx_active = 1; 865 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 866 if (err != 0){ 867 // no error from HCI Transport expected 868 status = ERROR_CODE_HARDWARE_FAILURE; 869 } 870 871 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 872 873 // done yet? 874 if (!more_fragments) break; 875 876 // can send more? 877 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 878 } 879 880 log_debug("hci_send_acl_packet_fragments loop over"); 881 882 // release buffer now for synchronous transport 883 if (hci_transport_synchronous()){ 884 hci_stack->acl_fragmentation_tx_active = 0; 885 hci_release_packet_buffer(); 886 hci_emit_transport_packet_sent(); 887 } 888 889 return status; 890 } 891 892 // pre: caller has reserved the packet buffer 893 uint8_t hci_send_acl_packet_buffer(int size){ 894 btstack_assert(hci_stack->hci_packet_buffer_reserved); 895 896 uint8_t * packet = hci_stack->hci_packet_buffer; 897 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 898 899 // check for free places on Bluetooth module 900 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 901 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 902 hci_release_packet_buffer(); 903 hci_emit_transport_packet_sent(); 904 return BTSTACK_ACL_BUFFERS_FULL; 905 } 906 907 hci_connection_t *connection = hci_connection_for_handle( con_handle); 908 if (!connection) { 909 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 910 hci_release_packet_buffer(); 911 hci_emit_transport_packet_sent(); 912 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 913 } 914 915 #ifdef ENABLE_CLASSIC 916 hci_connection_timestamp(connection); 917 #endif 918 919 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 920 921 // setup data 922 hci_stack->acl_fragmentation_total_size = size; 923 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 924 925 return hci_send_acl_packet_fragments(connection); 926 } 927 928 #ifdef ENABLE_CLASSIC 929 // pre: caller has reserved the packet buffer 930 uint8_t hci_send_sco_packet_buffer(int size){ 931 btstack_assert(hci_stack->hci_packet_buffer_reserved); 932 933 uint8_t * packet = hci_stack->hci_packet_buffer; 934 935 // skip checks in loopback mode 936 if (!hci_stack->loopback_mode){ 937 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 938 939 // check for free places on Bluetooth module 940 if (!hci_can_send_prepared_sco_packet_now()) { 941 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 942 hci_release_packet_buffer(); 943 hci_emit_transport_packet_sent(); 944 return BTSTACK_ACL_BUFFERS_FULL; 945 } 946 947 // track send packet in connection struct 948 hci_connection_t *connection = hci_connection_for_handle( con_handle); 949 if (!connection) { 950 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 951 hci_release_packet_buffer(); 952 hci_emit_transport_packet_sent(); 953 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 954 } 955 956 if (hci_have_usb_transport()){ 957 // token used 958 hci_stack->sco_can_send_now = false; 959 } else { 960 if (hci_stack->synchronous_flow_control_enabled){ 961 connection->num_packets_sent++; 962 } else { 963 connection->sco_tx_ready--; 964 } 965 } 966 } 967 968 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 969 970 #ifdef HAVE_SCO_TRANSPORT 971 hci_stack->sco_transport->send_packet(packet, size); 972 hci_release_packet_buffer(); 973 hci_emit_transport_packet_sent(); 974 975 return 0; 976 #else 977 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 978 if (hci_transport_synchronous()){ 979 hci_release_packet_buffer(); 980 hci_emit_transport_packet_sent(); 981 } 982 983 if (err != 0){ 984 return ERROR_CODE_HARDWARE_FAILURE; 985 } 986 return ERROR_CODE_SUCCESS; 987 #endif 988 } 989 #endif 990 991 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 992 static uint8_t hci_send_iso_packet_fragments(void){ 993 994 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 995 uint8_t status = ERROR_CODE_SUCCESS; 996 // multiple packets could be send on a synchronous HCI transport 997 while (true){ 998 999 // get current data 1000 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1001 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1002 bool more_fragments = false; 1003 1004 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1005 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1006 more_fragments = true; 1007 current_iso_data_packet_length = max_iso_data_packet_length; 1008 } 1009 1010 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1011 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1012 uint8_t pb_flags; 1013 if (iso_header_pos == 0u){ 1014 // first fragment, keep TS field 1015 pb_flags = more_fragments ? 0x00 : 0x02; 1016 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1017 } else { 1018 // later fragment, drop TS field 1019 pb_flags = more_fragments ? 0x01 : 0x03; 1020 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1021 } 1022 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1023 1024 // update header len 1025 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1026 1027 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1028 if (more_fragments){ 1029 // update start of next fragment to send 1030 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1031 } else { 1032 // done 1033 hci_stack->iso_fragmentation_pos = 0; 1034 hci_stack->iso_fragmentation_total_size = 0; 1035 } 1036 1037 // send packet 1038 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1039 const int size = current_iso_data_packet_length + 4; 1040 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1041 hci_stack->iso_fragmentation_tx_active = true; 1042 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1043 if (err != 0){ 1044 // no error from HCI Transport expected 1045 status = ERROR_CODE_HARDWARE_FAILURE; 1046 } 1047 1048 // done yet? 1049 if (!more_fragments) break; 1050 1051 // can send more? 1052 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1053 } 1054 1055 // release buffer now for synchronous transport 1056 if (hci_transport_synchronous()){ 1057 hci_stack->iso_fragmentation_tx_active = false; 1058 hci_release_packet_buffer(); 1059 hci_emit_transport_packet_sent(); 1060 } 1061 1062 return status; 1063 } 1064 1065 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1066 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1067 1068 // setup data 1069 hci_stack->iso_fragmentation_total_size = size; 1070 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1071 1072 // TODO: check for space on controller 1073 // TODO: track outgoing packet sent 1074 1075 return hci_send_iso_packet_fragments(); 1076 } 1077 #endif 1078 1079 static void acl_handler(uint8_t *packet, uint16_t size){ 1080 1081 // get info 1082 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1083 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1084 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1085 uint16_t acl_length = READ_ACL_LENGTH(packet); 1086 1087 // ignore non-registered handle 1088 if (!conn){ 1089 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1090 return; 1091 } 1092 1093 // assert packet is complete 1094 if ((acl_length + 4u) != size){ 1095 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1096 return; 1097 } 1098 1099 #ifdef ENABLE_CLASSIC 1100 // update idle timestamp 1101 hci_connection_timestamp(conn); 1102 #endif 1103 1104 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1105 hci_stack->host_completed_packets = 1; 1106 conn->num_packets_completed++; 1107 #endif 1108 1109 // handle different packet types 1110 switch (acl_flags & 0x03u) { 1111 1112 case 0x01: // continuation fragment 1113 1114 // sanity checks 1115 if (conn->acl_recombination_pos == 0u) { 1116 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1117 return; 1118 } 1119 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1120 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1121 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1122 conn->acl_recombination_pos = 0; 1123 return; 1124 } 1125 1126 // append fragment payload (header already stored) 1127 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1128 &packet[4], acl_length); 1129 conn->acl_recombination_pos += acl_length; 1130 1131 // forward complete L2CAP packet if complete. 1132 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1133 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1134 // reset recombination buffer 1135 conn->acl_recombination_length = 0; 1136 conn->acl_recombination_pos = 0; 1137 } 1138 break; 1139 1140 case 0x02: { // first fragment 1141 1142 // sanity check 1143 if (conn->acl_recombination_pos) { 1144 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 1145 conn->acl_recombination_pos = 0; 1146 } 1147 1148 // peek into L2CAP packet! 1149 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1150 1151 // compare fragment size to L2CAP packet size 1152 if (acl_length >= (l2cap_length + 4u)){ 1153 // forward fragment as L2CAP packet 1154 hci_emit_acl_packet(packet, acl_length + 4u); 1155 } else { 1156 1157 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1158 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1159 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1160 return; 1161 } 1162 1163 // store first fragment and tweak acl length for complete package 1164 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1165 packet, acl_length + 4u); 1166 conn->acl_recombination_pos = acl_length + 4u; 1167 conn->acl_recombination_length = l2cap_length; 1168 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1169 } 1170 break; 1171 1172 } 1173 default: 1174 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1175 return; 1176 } 1177 1178 // execute main loop 1179 hci_run(); 1180 } 1181 1182 static void hci_connection_stop_timer(hci_connection_t * conn){ 1183 btstack_run_loop_remove_timer(&conn->timeout); 1184 #ifdef ENABLE_CLASSIC 1185 btstack_run_loop_remove_timer(&conn->timeout_sco); 1186 #endif 1187 } 1188 1189 static void hci_shutdown_connection(hci_connection_t *conn){ 1190 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1191 1192 #ifdef ENABLE_CLASSIC 1193 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1194 bd_addr_type_t addr_type = conn->address_type; 1195 #endif 1196 #ifdef HAVE_SCO_TRANSPORT 1197 hci_con_handle_t con_handle = conn->con_handle; 1198 #endif 1199 #endif 1200 1201 hci_connection_stop_timer(conn); 1202 1203 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1204 btstack_memory_hci_connection_free( conn ); 1205 1206 // now it's gone 1207 hci_emit_nr_connections_changed(); 1208 1209 #ifdef ENABLE_CLASSIC 1210 #ifdef ENABLE_SCO_OVER_HCI 1211 // update SCO 1212 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1213 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1214 } 1215 #endif 1216 #ifdef HAVE_SCO_TRANSPORT 1217 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1218 hci_stack->sco_transport->close(con_handle); 1219 } 1220 #endif 1221 #endif 1222 } 1223 1224 #ifdef ENABLE_CLASSIC 1225 1226 static const uint16_t packet_type_sizes[] = { 1227 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1228 HCI_ACL_DH1_SIZE, 0, 0, 0, 1229 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1230 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1231 }; 1232 static const uint8_t packet_type_feature_requirement_bit[] = { 1233 0, // 3 slot packets 1234 1, // 5 slot packets 1235 25, // EDR 2 mpbs 1236 26, // EDR 3 mbps 1237 39, // 3 slot EDR packts 1238 40, // 5 slot EDR packet 1239 }; 1240 static const uint16_t packet_type_feature_packet_mask[] = { 1241 0x0f00, // 3 slot packets 1242 0xf000, // 5 slot packets 1243 0x1102, // EDR 2 mpbs 1244 0x2204, // EDR 3 mbps 1245 0x0300, // 3 slot EDR packts 1246 0x3000, // 5 slot EDR packet 1247 }; 1248 1249 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1250 // enable packet types based on size 1251 uint16_t packet_types = 0; 1252 unsigned int i; 1253 for (i=0;i<16;i++){ 1254 if (packet_type_sizes[i] == 0) continue; 1255 if (packet_type_sizes[i] <= buffer_size){ 1256 packet_types |= 1 << i; 1257 } 1258 } 1259 // disable packet types due to missing local supported features 1260 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1261 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1262 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1263 if (feature_set) continue; 1264 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1265 packet_types &= ~packet_type_feature_packet_mask[i]; 1266 } 1267 // flip bits for "may not be used" 1268 packet_types ^= 0x3306; 1269 return packet_types; 1270 } 1271 1272 uint16_t hci_usable_acl_packet_types(void){ 1273 return hci_stack->packet_types; 1274 } 1275 #endif 1276 1277 uint8_t* hci_get_outgoing_packet_buffer(void){ 1278 // hci packet buffer is >= acl data packet length 1279 return hci_stack->hci_packet_buffer; 1280 } 1281 1282 uint16_t hci_max_acl_data_packet_length(void){ 1283 return hci_stack->acl_data_packet_length; 1284 } 1285 1286 #ifdef ENABLE_CLASSIC 1287 bool hci_extended_sco_link_supported(void){ 1288 // No. 31, byte 3, bit 7 1289 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1290 } 1291 #endif 1292 1293 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1294 // No. 54, byte 6, bit 6 1295 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1296 } 1297 1298 #ifdef ENABLE_CLASSIC 1299 static int gap_ssp_supported(void){ 1300 // No. 51, byte 6, bit 3 1301 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1302 } 1303 #endif 1304 1305 static int hci_classic_supported(void){ 1306 #ifdef ENABLE_CLASSIC 1307 // No. 37, byte 4, bit 5, = No BR/EDR Support 1308 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1309 #else 1310 return 0; 1311 #endif 1312 } 1313 1314 static int hci_le_supported(void){ 1315 #ifdef ENABLE_BLE 1316 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1317 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1318 #else 1319 return 0; 1320 #endif 1321 } 1322 1323 static bool hci_command_supported(uint8_t command_index){ 1324 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1325 } 1326 1327 #ifdef ENABLE_BLE 1328 1329 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1330 static bool hci_extended_advertising_supported(void){ 1331 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1332 } 1333 #endif 1334 1335 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1336 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1337 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1338 } else { 1339 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1340 } 1341 } 1342 1343 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1344 *addr_type = hci_stack->le_own_addr_type; 1345 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1346 } 1347 1348 #ifdef ENABLE_LE_PERIPHERAL 1349 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1350 *addr_type = hci_stack->le_advertisements_own_addr_type; 1351 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1352 }; 1353 #endif 1354 1355 #ifdef ENABLE_LE_CENTRAL 1356 1357 /** 1358 * @brief Get own addr type and address used for LE connections (Central) 1359 */ 1360 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1361 *addr_type = hci_stack->le_connection_own_addr_type; 1362 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1363 } 1364 1365 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1366 1367 uint16_t offset = 3; 1368 uint8_t num_reports = packet[offset]; 1369 offset += 1; 1370 1371 uint16_t i; 1372 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1373 for (i=0; (i<num_reports) && (offset < size);i++){ 1374 // sanity checks on data_length: 1375 uint8_t data_length = packet[offset + 8]; 1376 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1377 if ((offset + 9u + data_length + 1u) > size) return; 1378 // setup event 1379 uint8_t event_size = 10u + data_length; 1380 uint16_t pos = 0; 1381 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1382 event[pos++] = event_size; 1383 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1384 offset += 8; 1385 pos += 8; 1386 event[pos++] = packet[offset + 1 + data_length]; // rssi 1387 event[pos++] = data_length; 1388 offset++; 1389 (void)memcpy(&event[pos], &packet[offset], data_length); 1390 pos += data_length; 1391 offset += data_length + 1u; // rssi 1392 hci_emit_event(event, pos, 1); 1393 } 1394 } 1395 1396 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1397 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1398 uint16_t offset = 3; 1399 uint8_t num_reports = packet[offset++]; 1400 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1401 uint8_t i; 1402 for (i=0; (i<num_reports) && (offset < size);i++){ 1403 // sanity checks on data_length: 1404 uint16_t data_length = packet[offset + 23]; 1405 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1406 if ((offset + 24u + data_length) > size) return; 1407 uint16_t event_type = little_endian_read_16(packet, offset); 1408 offset += 2; 1409 if ((event_type & 0x10) != 0) { 1410 // setup legacy event 1411 uint8_t legacy_event_type; 1412 switch (event_type){ 1413 case 0b0010011: 1414 // ADV_IND 1415 legacy_event_type = 0; 1416 break; 1417 case 0b0010101: 1418 // ADV_DIRECT_IND 1419 legacy_event_type = 1; 1420 break; 1421 case 0b0010010: 1422 // ADV_SCAN_IND 1423 legacy_event_type = 2; 1424 break; 1425 case 0b0010000: 1426 // ADV_NONCONN_IND 1427 legacy_event_type = 3; 1428 break; 1429 case 0b0011011: 1430 case 0b0011010: 1431 // SCAN_RSP 1432 legacy_event_type = 4; 1433 break; 1434 default: 1435 legacy_event_type = 0; 1436 break; 1437 } 1438 uint16_t pos = 0; 1439 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1440 event[pos++] = 10u + data_length; 1441 event[pos++] = legacy_event_type; 1442 // copy address type + address 1443 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1444 offset += 7; 1445 pos += 7; 1446 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1447 offset += 4; 1448 // copy rssi 1449 event[pos++] = packet[offset++]; 1450 // skip periodic advertising interval and direct address 1451 offset += 9; 1452 // copy data len + data; 1453 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1454 pos += 1 +data_length; 1455 offset += 1+ data_length; 1456 hci_emit_event(event, pos, 1); 1457 } else { 1458 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1459 uint8_t report_len = 24 + data_length; 1460 event[1] = report_len; 1461 little_endian_store_16(event, 2, event_type); 1462 memcpy(&event[4], &packet[offset], report_len); 1463 offset += report_len; 1464 hci_emit_event(event, 2 + report_len, 1); 1465 } 1466 } 1467 } 1468 #endif 1469 1470 #endif 1471 #endif 1472 1473 #ifdef ENABLE_BLE 1474 #ifdef ENABLE_LE_PERIPHERAL 1475 static void hci_update_advertisements_enabled_for_current_roles(void){ 1476 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1477 // get number of active le slave connections 1478 int num_slave_connections = 0; 1479 btstack_linked_list_iterator_t it; 1480 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1481 while (btstack_linked_list_iterator_has_next(&it)){ 1482 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1483 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1484 if (con->state != OPEN) continue; 1485 if (con->role != HCI_ROLE_SLAVE) continue; 1486 if (!hci_is_le_connection(con)) continue; 1487 num_slave_connections++; 1488 } 1489 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1490 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1491 } else { 1492 hci_stack->le_advertisements_enabled_for_current_roles = false; 1493 } 1494 } 1495 #endif 1496 #endif 1497 1498 #ifdef ENABLE_CLASSIC 1499 static void gap_run_set_local_name(void){ 1500 hci_reserve_packet_buffer(); 1501 uint8_t * packet = hci_stack->hci_packet_buffer; 1502 // construct HCI Command and send 1503 uint16_t opcode = hci_write_local_name.opcode; 1504 hci_stack->last_cmd_opcode = opcode; 1505 packet[0] = opcode & 0xff; 1506 packet[1] = opcode >> 8; 1507 packet[2] = DEVICE_NAME_LEN; 1508 memset(&packet[3], 0, DEVICE_NAME_LEN); 1509 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1510 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1511 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1512 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1513 // expand '00:00:00:00:00:00' in name with bd_addr 1514 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1515 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1516 } 1517 1518 static void gap_run_set_eir_data(void){ 1519 hci_reserve_packet_buffer(); 1520 uint8_t * packet = hci_stack->hci_packet_buffer; 1521 // construct HCI Command in-place and send 1522 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1523 hci_stack->last_cmd_opcode = opcode; 1524 uint16_t offset = 0; 1525 packet[offset++] = opcode & 0xff; 1526 packet[offset++] = opcode >> 8; 1527 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1528 packet[offset++] = 0; // FEC not required 1529 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1530 if (hci_stack->eir_data){ 1531 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1532 ad_context_t context; 1533 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1534 uint8_t data_type = ad_iterator_get_data_type(&context); 1535 uint8_t size = ad_iterator_get_data_len(&context); 1536 const uint8_t *data = ad_iterator_get_data(&context); 1537 // copy item 1538 packet[offset++] = size + 1; 1539 packet[offset++] = data_type; 1540 memcpy(&packet[offset], data, size); 1541 // update name item 1542 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1543 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1544 } 1545 offset += size; 1546 } 1547 } else { 1548 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1549 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1550 packet[offset++] = bytes_to_copy + 1; 1551 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1552 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1553 // expand '00:00:00:00:00:00' in name with bd_addr 1554 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1555 } 1556 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1557 } 1558 1559 static void hci_run_gap_tasks_classic(void){ 1560 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1561 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1562 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1563 return; 1564 } 1565 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1566 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1567 gap_run_set_local_name(); 1568 return; 1569 } 1570 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1571 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1572 gap_run_set_eir_data(); 1573 return; 1574 } 1575 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1576 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1577 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1578 return; 1579 } 1580 // write page scan activity 1581 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1582 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1583 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1584 return; 1585 } 1586 // write page scan type 1587 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1588 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1589 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1590 return; 1591 } 1592 // write page timeout 1593 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1594 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1595 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1596 return; 1597 } 1598 // send scan enable 1599 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1600 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1601 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1602 return; 1603 } 1604 // send write scan activity 1605 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1606 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1607 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1608 return; 1609 } 1610 } 1611 #endif 1612 1613 #ifndef HAVE_HOST_CONTROLLER_API 1614 1615 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1616 if (!hci_stack->config) return 0; 1617 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1618 // Limit baud rate for Broadcom chipsets to 3 mbps 1619 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1620 baud_rate = 3000000; 1621 } 1622 return baud_rate; 1623 } 1624 1625 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1626 UNUSED(ds); 1627 1628 switch (hci_stack->substate){ 1629 case HCI_INIT_W4_SEND_RESET: 1630 log_info("Resend HCI Reset"); 1631 hci_stack->substate = HCI_INIT_SEND_RESET; 1632 hci_stack->num_cmd_packets = 1; 1633 hci_run(); 1634 break; 1635 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1636 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1637 if (hci_stack->hci_transport->reset_link){ 1638 hci_stack->hci_transport->reset_link(); 1639 } 1640 1641 /* fall through */ 1642 1643 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1644 log_info("Resend HCI Reset - CSR Warm Boot"); 1645 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1646 hci_stack->num_cmd_packets = 1; 1647 hci_run(); 1648 break; 1649 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1650 if (hci_stack->hci_transport->set_baudrate){ 1651 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1652 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1653 hci_stack->hci_transport->set_baudrate(baud_rate); 1654 } 1655 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1656 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1657 if (hci_stack->hci_transport->reset_link){ 1658 log_info("Link Reset"); 1659 hci_stack->hci_transport->reset_link(); 1660 } 1661 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1662 hci_run(); 1663 } 1664 break; 1665 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1666 // otherwise continue 1667 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1668 hci_send_cmd(&hci_read_local_supported_commands); 1669 break; 1670 default: 1671 break; 1672 } 1673 } 1674 #endif 1675 1676 static void hci_initializing_next_state(void){ 1677 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1678 } 1679 1680 static void hci_init_done(void){ 1681 // done. tell the app 1682 log_info("hci_init_done -> HCI_STATE_WORKING"); 1683 hci_stack->state = HCI_STATE_WORKING; 1684 hci_emit_state(); 1685 } 1686 1687 // assumption: hci_can_send_command_packet_now() == true 1688 static void hci_initializing_run(void){ 1689 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1690 1691 if (!hci_can_send_command_packet_now()) return; 1692 1693 #ifndef HAVE_HOST_CONTROLLER_API 1694 bool need_baud_change = hci_stack->config 1695 && hci_stack->chipset 1696 && hci_stack->chipset->set_baudrate_command 1697 && hci_stack->hci_transport->set_baudrate 1698 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1699 #endif 1700 1701 switch (hci_stack->substate){ 1702 case HCI_INIT_SEND_RESET: 1703 hci_state_reset(); 1704 1705 #ifndef HAVE_HOST_CONTROLLER_API 1706 // prepare reset if command complete not received in 100ms 1707 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1708 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1709 btstack_run_loop_add_timer(&hci_stack->timeout); 1710 #endif 1711 // send command 1712 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1713 hci_send_cmd(&hci_reset); 1714 break; 1715 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1716 hci_send_cmd(&hci_read_local_version_information); 1717 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1718 break; 1719 1720 #ifndef HAVE_HOST_CONTROLLER_API 1721 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1722 hci_state_reset(); 1723 // prepare reset if command complete not received in 100ms 1724 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1725 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1726 btstack_run_loop_add_timer(&hci_stack->timeout); 1727 // send command 1728 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1729 hci_send_cmd(&hci_reset); 1730 break; 1731 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1732 hci_state_reset(); 1733 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1734 hci_send_cmd(&hci_reset); 1735 break; 1736 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1737 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1738 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1739 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1740 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1741 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1742 break; 1743 } 1744 case HCI_INIT_SET_BD_ADDR: 1745 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1746 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1747 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1748 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1749 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1750 break; 1751 case HCI_INIT_SEND_READ_LOCAL_NAME: 1752 #ifdef ENABLE_CLASSIC 1753 hci_send_cmd(&hci_read_local_name); 1754 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1755 break; 1756 #endif 1757 /* fall through */ 1758 1759 case HCI_INIT_SEND_BAUD_CHANGE: 1760 if (need_baud_change) { 1761 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1762 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1763 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1764 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1765 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1766 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1767 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1768 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1769 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1770 btstack_run_loop_add_timer(&hci_stack->timeout); 1771 } 1772 break; 1773 } 1774 1775 /* fall through */ 1776 1777 case HCI_INIT_CUSTOM_INIT: 1778 // Custom initialization 1779 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1780 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1781 bool send_cmd = false; 1782 switch (hci_stack->chipset_result){ 1783 case BTSTACK_CHIPSET_VALID_COMMAND: 1784 send_cmd = true; 1785 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1786 break; 1787 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1788 send_cmd = true; 1789 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1790 log_info("CSR Warm Boot"); 1791 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1792 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1793 btstack_run_loop_add_timer(&hci_stack->timeout); 1794 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1795 && hci_stack->config 1796 && hci_stack->chipset 1797 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1798 && hci_stack->hci_transport->set_baudrate 1799 && hci_transport_uart_get_main_baud_rate()){ 1800 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1801 } else { 1802 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1803 } 1804 break; 1805 default: 1806 break; 1807 } 1808 1809 if (send_cmd){ 1810 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1811 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1812 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1813 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1814 break; 1815 } 1816 log_info("Init script done"); 1817 1818 // Init script download on Broadcom chipsets causes: 1819 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1820 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1821 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1822 1823 // - baud rate to reset, restore UART baud rate if needed 1824 if (need_baud_change) { 1825 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1826 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1827 hci_stack->hci_transport->set_baudrate(baud_rate); 1828 } 1829 1830 uint16_t bcm_delay_ms = 300; 1831 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1832 // -> Work around: wait here. 1833 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1834 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1835 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1836 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1837 btstack_run_loop_add_timer(&hci_stack->timeout); 1838 break; 1839 } 1840 } 1841 #endif 1842 /* fall through */ 1843 1844 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1845 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1846 hci_send_cmd(&hci_read_local_supported_commands); 1847 break; 1848 case HCI_INIT_READ_BD_ADDR: 1849 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1850 hci_send_cmd(&hci_read_bd_addr); 1851 break; 1852 case HCI_INIT_READ_BUFFER_SIZE: 1853 // only read buffer size if supported 1854 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1855 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1856 hci_send_cmd(&hci_read_buffer_size); 1857 break; 1858 } 1859 1860 /* fall through */ 1861 1862 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1863 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1864 hci_send_cmd(&hci_read_local_supported_features); 1865 break; 1866 1867 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1868 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1869 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1870 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1871 break; 1872 case HCI_INIT_HOST_BUFFER_SIZE: 1873 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1874 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1875 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1876 break; 1877 #endif 1878 1879 case HCI_INIT_SET_EVENT_MASK: 1880 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1881 if (hci_le_supported()){ 1882 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1883 } else { 1884 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1885 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1886 } 1887 break; 1888 1889 case HCI_INIT_SET_EVENT_MASK_2: 1890 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1891 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1892 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1893 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1894 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1895 // Encryption Change Event v2 - bit 25 1896 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1897 break; 1898 } 1899 1900 #ifdef ENABLE_CLASSIC 1901 /* fall through */ 1902 1903 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1904 if (hci_classic_supported() && gap_ssp_supported()){ 1905 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1906 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1907 break; 1908 } 1909 1910 /* fall through */ 1911 1912 case HCI_INIT_WRITE_INQUIRY_MODE: 1913 if (hci_classic_supported()){ 1914 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1915 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1916 break; 1917 } 1918 1919 /* fall through */ 1920 1921 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1922 // skip write secure connections host support if not supported or disabled 1923 if (hci_classic_supported() && hci_stack->secure_connections_enable 1924 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 1925 hci_stack->secure_connections_active = true; 1926 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1927 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1928 break; 1929 } 1930 1931 /* fall through */ 1932 1933 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 1934 // skip set min encryption key size 1935 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 1936 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 1937 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 1938 break; 1939 } 1940 1941 #ifdef ENABLE_SCO_OVER_HCI 1942 /* fall through */ 1943 1944 // only sent if ENABLE_SCO_OVER_HCI is defined 1945 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1946 // skip write synchronous flow control if not supported 1947 if (hci_classic_supported() 1948 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 1949 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1950 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1951 break; 1952 } 1953 /* fall through */ 1954 1955 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1956 // skip write default erroneous data reporting if not supported 1957 if (hci_classic_supported() 1958 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 1959 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1960 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1961 break; 1962 } 1963 #endif 1964 1965 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1966 /* fall through */ 1967 1968 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1969 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1970 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1971 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1972 #ifdef ENABLE_SCO_OVER_HCI 1973 log_info("BCM: Route SCO data via HCI transport"); 1974 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1975 #endif 1976 #ifdef ENABLE_SCO_OVER_PCM 1977 log_info("BCM: Route SCO data via PCM interface"); 1978 #ifdef ENABLE_BCM_PCM_WBS 1979 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1980 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1981 #else 1982 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1983 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1984 #endif 1985 #endif 1986 break; 1987 } 1988 #endif 1989 1990 #ifdef ENABLE_SCO_OVER_PCM 1991 /* fall through */ 1992 1993 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1994 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1995 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1996 log_info("BCM: Config PCM interface for I2S"); 1997 #ifdef ENABLE_BCM_PCM_WBS 1998 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1999 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2000 #else 2001 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2002 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2003 #endif 2004 break; 2005 } 2006 #endif 2007 #endif 2008 2009 #ifdef ENABLE_BLE 2010 /* fall through */ 2011 2012 // LE INIT 2013 case HCI_INIT_LE_READ_BUFFER_SIZE: 2014 if (hci_le_supported()){ 2015 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2016 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2017 hci_send_cmd(&hci_le_read_buffer_size_v2); 2018 } else { 2019 hci_send_cmd(&hci_le_read_buffer_size); 2020 } 2021 break; 2022 } 2023 2024 /* fall through */ 2025 2026 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2027 // skip write le host if not supported (e.g. on LE only EM9301) 2028 if (hci_le_supported() 2029 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2030 // LE Supported Host = 1, Simultaneous Host = 0 2031 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2032 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2033 break; 2034 } 2035 2036 /* fall through */ 2037 2038 case HCI_INIT_LE_SET_EVENT_MASK: 2039 if (hci_le_supported()){ 2040 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2041 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2042 break; 2043 } 2044 #endif 2045 2046 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2047 /* fall through */ 2048 2049 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2050 if (hci_le_supported() 2051 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2052 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2053 hci_send_cmd(&hci_le_read_maximum_data_length); 2054 break; 2055 } 2056 2057 /* fall through */ 2058 2059 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2060 if (hci_le_supported() 2061 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2062 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2063 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2064 break; 2065 } 2066 #endif 2067 2068 #ifdef ENABLE_LE_CENTRAL 2069 /* fall through */ 2070 2071 case HCI_INIT_READ_WHITE_LIST_SIZE: 2072 if (hci_le_supported()){ 2073 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2074 hci_send_cmd(&hci_le_read_white_list_size); 2075 break; 2076 } 2077 2078 #endif 2079 2080 #ifdef ENABLE_LE_PERIPHERAL 2081 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2082 /* fall through */ 2083 2084 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2085 if (hci_extended_advertising_supported()){ 2086 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2087 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2088 break; 2089 } 2090 #endif 2091 #endif 2092 /* fall through */ 2093 2094 case HCI_INIT_DONE: 2095 hci_stack->substate = HCI_INIT_DONE; 2096 // main init sequence complete 2097 #ifdef ENABLE_CLASSIC 2098 // check if initial Classic GAP Tasks are completed 2099 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2100 hci_run_gap_tasks_classic(); 2101 break; 2102 } 2103 #endif 2104 #ifdef ENABLE_BLE 2105 #ifdef ENABLE_LE_CENTRAL 2106 // check if initial LE GAP Tasks are completed 2107 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2108 hci_run_general_gap_le(); 2109 break; 2110 } 2111 #endif 2112 #endif 2113 hci_init_done(); 2114 break; 2115 2116 default: 2117 return; 2118 } 2119 } 2120 2121 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2122 bool command_completed = false; 2123 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2124 uint16_t opcode = little_endian_read_16(packet,3); 2125 if (opcode == hci_stack->last_cmd_opcode){ 2126 command_completed = true; 2127 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2128 } else { 2129 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2130 } 2131 } 2132 2133 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2134 uint8_t status = packet[2]; 2135 uint16_t opcode = little_endian_read_16(packet,4); 2136 if (opcode == hci_stack->last_cmd_opcode){ 2137 if (status){ 2138 command_completed = true; 2139 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2140 } else { 2141 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2142 } 2143 } else { 2144 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2145 } 2146 } 2147 #ifndef HAVE_HOST_CONTROLLER_API 2148 // Vendor == CSR 2149 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2150 // TODO: track actual command 2151 command_completed = true; 2152 } 2153 2154 // Vendor == Toshiba 2155 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2156 // TODO: track actual command 2157 command_completed = true; 2158 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2159 hci_stack->num_cmd_packets = 1; 2160 } 2161 #endif 2162 2163 return command_completed; 2164 } 2165 2166 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2167 2168 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2169 2170 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2171 2172 #ifndef HAVE_HOST_CONTROLLER_API 2173 2174 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2175 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2176 // 2177 // HCI Reset 2178 // Timeout 100 ms 2179 // HCI Reset 2180 // Command Complete Reset 2181 // HCI Read Local Version Information 2182 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2183 // hang... 2184 // 2185 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2186 if (!command_completed 2187 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2188 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2189 2190 uint16_t opcode = little_endian_read_16(packet,3); 2191 if (opcode == hci_reset.opcode){ 2192 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2193 return; 2194 } 2195 } 2196 2197 // CSR & H5 2198 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2199 if (!command_completed 2200 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2201 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2202 2203 uint16_t opcode = little_endian_read_16(packet,3); 2204 if (opcode == hci_reset.opcode){ 2205 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2206 return; 2207 } 2208 } 2209 2210 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2211 // fix: Correct substate and behave as command below 2212 if (command_completed){ 2213 switch (hci_stack->substate){ 2214 case HCI_INIT_SEND_RESET: 2215 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2216 break; 2217 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2218 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2219 break; 2220 default: 2221 break; 2222 } 2223 } 2224 2225 #endif 2226 2227 if (!command_completed) return; 2228 2229 bool need_baud_change = false; 2230 bool need_addr_change = false; 2231 2232 #ifndef HAVE_HOST_CONTROLLER_API 2233 need_baud_change = hci_stack->config 2234 && hci_stack->chipset 2235 && hci_stack->chipset->set_baudrate_command 2236 && hci_stack->hci_transport->set_baudrate 2237 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2238 2239 need_addr_change = hci_stack->custom_bd_addr_set 2240 && hci_stack->chipset 2241 && hci_stack->chipset->set_bd_addr_command; 2242 #endif 2243 2244 switch(hci_stack->substate){ 2245 2246 #ifndef HAVE_HOST_CONTROLLER_API 2247 case HCI_INIT_SEND_RESET: 2248 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2249 // fix: just correct substate and behave as command below 2250 2251 /* fall through */ 2252 #endif 2253 2254 case HCI_INIT_W4_SEND_RESET: 2255 btstack_run_loop_remove_timer(&hci_stack->timeout); 2256 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2257 return; 2258 2259 #ifndef HAVE_HOST_CONTROLLER_API 2260 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2261 // for STLC2500D, baud rate change already happened. 2262 // for others, baud rate gets changed now 2263 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2265 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2266 hci_stack->hci_transport->set_baudrate(baud_rate); 2267 } 2268 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2269 return; 2270 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2271 btstack_run_loop_remove_timer(&hci_stack->timeout); 2272 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2273 return; 2274 case HCI_INIT_W4_CUSTOM_INIT: 2275 // repeat custom init 2276 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2277 return; 2278 #endif 2279 2280 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2281 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2282 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2283 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2284 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2285 return; 2286 } 2287 if (need_addr_change){ 2288 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2289 return; 2290 } 2291 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2292 return; 2293 #ifndef HAVE_HOST_CONTROLLER_API 2294 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2295 if (need_baud_change){ 2296 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2297 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2298 hci_stack->hci_transport->set_baudrate(baud_rate); 2299 } 2300 if (need_addr_change){ 2301 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2302 return; 2303 } 2304 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2305 return; 2306 case HCI_INIT_W4_SET_BD_ADDR: 2307 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2308 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2309 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2310 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2311 return; 2312 } 2313 // skipping st warm boot 2314 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2315 return; 2316 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2317 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2318 return; 2319 #endif 2320 2321 case HCI_INIT_DONE: 2322 // set state if we came here by fall through 2323 hci_stack->substate = HCI_INIT_DONE; 2324 return; 2325 2326 default: 2327 break; 2328 } 2329 hci_initializing_next_state(); 2330 } 2331 2332 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2333 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2334 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2335 // check if we have been aware of the HCI connection 2336 switch (conn->state){ 2337 case SENT_CREATE_CONNECTION: 2338 case RECEIVED_CONNECTION_REQUEST: 2339 break; 2340 default: 2341 return; 2342 } 2343 2344 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2345 bd_addr_t bd_address; 2346 (void)memcpy(&bd_address, conn->address, 6); 2347 2348 #ifdef ENABLE_CLASSIC 2349 // cache needed data 2350 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2351 #endif 2352 2353 // connection failed, remove entry 2354 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2355 btstack_memory_hci_connection_free( conn ); 2356 2357 #ifdef ENABLE_CLASSIC 2358 // notify client if dedicated bonding 2359 if (notify_dedicated_bonding_failed){ 2360 log_info("hci notify_dedicated_bonding_failed"); 2361 hci_emit_dedicated_bonding_result(bd_address, status); 2362 } 2363 2364 // if authentication error, also delete link key 2365 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2366 gap_drop_link_key_for_bd_addr(bd_address); 2367 } 2368 #else 2369 UNUSED(status); 2370 #endif 2371 } 2372 2373 #ifdef ENABLE_CLASSIC 2374 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2375 // SSP Controller 2376 if (features[6] & (1 << 3)){ 2377 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2378 } 2379 // eSCO 2380 if (features[3] & (1<<7)){ 2381 conn->remote_supported_features[0] |= 1; 2382 } 2383 // Extended features 2384 if (features[7] & (1<<7)){ 2385 conn->remote_supported_features[0] |= 2; 2386 } 2387 } 2388 2389 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2390 // SSP Host 2391 if (features[0] & (1 << 0)){ 2392 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2393 } 2394 // SC Host 2395 if (features[0] & (1 << 3)){ 2396 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2397 } 2398 } 2399 2400 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2401 // SC Controller 2402 if (features[1] & (1 << 0)){ 2403 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2404 } 2405 } 2406 2407 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2408 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2409 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2410 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2411 if (conn->bonding_flags & BONDING_DEDICATED){ 2412 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2413 } 2414 } 2415 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2416 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2417 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2418 } 2419 2420 #endif 2421 2422 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2423 // handle BT initialization 2424 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2425 hci_initializing_event_handler(packet, size); 2426 } 2427 2428 // help with BT sleep 2429 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2430 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2431 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2432 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2433 hci_initializing_next_state(); 2434 } 2435 } 2436 2437 #ifdef ENABLE_CLASSIC 2438 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2439 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2440 conn->encryption_key_size = encryption_key_size; 2441 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2442 2443 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2444 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2445 conn->bonding_flags &= ~BONDING_DEDICATED; 2446 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2447 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2448 return; 2449 } 2450 2451 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2452 conn->requested_security_level = LEVEL_0; 2453 hci_emit_security_level(conn->con_handle, security_level); 2454 return; 2455 } 2456 2457 // Request remote features if not already done 2458 hci_trigger_remote_features_for_connection(conn); 2459 2460 // Request Authentication if not already done 2461 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2462 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2463 } 2464 #endif 2465 2466 static void hci_store_local_supported_commands(const uint8_t * packet){ 2467 // create mapping table 2468 #define X(name, offset, bit) { offset, bit }, 2469 static struct { 2470 uint8_t byte_offset; 2471 uint8_t bit_position; 2472 } supported_hci_commands_map [] = { 2473 SUPPORTED_HCI_COMMANDS 2474 }; 2475 #undef X 2476 2477 // create names for debug purposes 2478 #ifdef ENABLE_LOG_DEBUG 2479 #define X(name, offset, bit) #name, 2480 static const char * command_names[] = { 2481 SUPPORTED_HCI_COMMANDS 2482 }; 2483 #undef X 2484 #endif 2485 2486 hci_stack->local_supported_commands = 0; 2487 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2488 uint16_t i; 2489 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2490 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2491 #ifdef ENABLE_LOG_DEBUG 2492 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); 2493 #else 2494 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2495 #endif 2496 hci_stack->local_supported_commands |= (1LU << i); 2497 } 2498 } 2499 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2500 } 2501 2502 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2503 UNUSED(size); 2504 2505 uint16_t manufacturer; 2506 #ifdef ENABLE_CLASSIC 2507 hci_con_handle_t handle; 2508 hci_connection_t * conn; 2509 uint8_t status; 2510 #endif 2511 // get num cmd packets - limit to 1 to reduce complexity 2512 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2513 2514 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2515 switch (opcode){ 2516 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2517 if (packet[5]) break; 2518 // terminate, name 248 chars 2519 packet[6+248] = 0; 2520 log_info("local name: %s", &packet[6]); 2521 break; 2522 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2523 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2524 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2525 uint16_t acl_len = little_endian_read_16(packet, 6); 2526 uint16_t sco_len = packet[8]; 2527 2528 // determine usable ACL/SCO payload size 2529 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2530 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2531 2532 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2533 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2534 2535 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2536 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2537 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2538 } 2539 break; 2540 case HCI_OPCODE_HCI_READ_RSSI: 2541 if (packet[5] == ERROR_CODE_SUCCESS){ 2542 uint8_t event[5]; 2543 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2544 event[1] = 3; 2545 (void)memcpy(&event[2], &packet[6], 3); 2546 hci_emit_event(event, sizeof(event), 1); 2547 } 2548 break; 2549 #ifdef ENABLE_BLE 2550 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2551 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2552 hci_stack->le_iso_packets_total_num = packet[11]; 2553 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2554 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2555 2556 /* fall through */ 2557 2558 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2559 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2560 hci_stack->le_acl_packets_total_num = packet[8]; 2561 // determine usable ACL payload size 2562 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2563 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2564 } 2565 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); 2566 break; 2567 #endif 2568 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2569 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2570 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2571 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2572 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); 2573 break; 2574 #endif 2575 #ifdef ENABLE_LE_CENTRAL 2576 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2577 hci_stack->le_whitelist_capacity = packet[6]; 2578 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2579 break; 2580 #endif 2581 #ifdef ENABLE_LE_PERIPHERAL 2582 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2583 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2584 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2585 break; 2586 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2587 if (hci_stack->le_advertising_set_in_current_command != 0) { 2588 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2589 hci_stack->le_advertising_set_in_current_command = 0; 2590 if (advertising_set == NULL) break; 2591 uint8_t adv_status = packet[6]; 2592 uint8_t tx_power = packet[7]; 2593 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 }; 2594 if (adv_status == 0){ 2595 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2596 } 2597 hci_emit_event(event, sizeof(event), 1); 2598 } 2599 break; 2600 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2601 if (hci_stack->le_advertising_set_in_current_command != 0) { 2602 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2603 hci_stack->le_advertising_set_in_current_command = 0; 2604 if (advertising_set == NULL) break; 2605 uint8_t adv_status = packet[5]; 2606 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2607 if (adv_status == 0){ 2608 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2609 } 2610 hci_emit_event(event, sizeof(event), 1); 2611 } 2612 break; 2613 #endif 2614 #endif 2615 case HCI_OPCODE_HCI_READ_BD_ADDR: 2616 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2617 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)); 2618 #ifdef ENABLE_CLASSIC 2619 if (hci_stack->link_key_db){ 2620 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2621 } 2622 #endif 2623 break; 2624 #ifdef ENABLE_CLASSIC 2625 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2626 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2627 break; 2628 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2629 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2630 if (status == ERROR_CODE_SUCCESS) { 2631 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2632 } else { 2633 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2634 } 2635 break; 2636 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2637 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2638 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2639 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2640 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2641 hci_emit_event(event, sizeof(event), 1); 2642 } 2643 break; 2644 #endif 2645 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2646 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2647 2648 #ifdef ENABLE_CLASSIC 2649 // determine usable ACL packet types based on host buffer size and supported features 2650 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2651 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2652 #endif 2653 // Classic/LE 2654 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2655 break; 2656 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2657 manufacturer = little_endian_read_16(packet, 10); 2658 // map Cypress to Broadcom 2659 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2660 log_info("Treat Cypress as Broadcom"); 2661 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2662 little_endian_store_16(packet, 10, manufacturer); 2663 } 2664 hci_stack->manufacturer = manufacturer; 2665 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2666 break; 2667 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2668 hci_store_local_supported_commands(packet); 2669 break; 2670 #ifdef ENABLE_CLASSIC 2671 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2672 if (packet[5]) return; 2673 hci_stack->synchronous_flow_control_enabled = 1; 2674 break; 2675 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2676 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2677 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2678 conn = hci_connection_for_handle(handle); 2679 if (conn != NULL) { 2680 uint8_t key_size = 0; 2681 if (status == 0){ 2682 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2683 log_info("Handle %04x key Size: %u", handle, key_size); 2684 } else { 2685 key_size = 1; 2686 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2687 } 2688 hci_handle_read_encryption_key_size_complete(conn, key_size); 2689 } 2690 break; 2691 // assert pairing complete event is emitted. 2692 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2693 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2694 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2695 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2696 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2697 // lookup connection by gap pairing addr 2698 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2699 if (conn == NULL) break; 2700 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2701 break; 2702 2703 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2704 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2705 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2706 uint8_t event[67]; 2707 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2708 event[1] = 65; 2709 (void)memset(&event[2], 0, 65); 2710 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2711 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2712 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2713 event[2] = 3; 2714 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2715 } else { 2716 event[2] = 1; 2717 } 2718 } 2719 hci_emit_event(event, sizeof(event), 0); 2720 break; 2721 } 2722 2723 // note: only needed if user does not provide OOB data 2724 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2725 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2726 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2727 if (conn == NULL) break; 2728 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2729 break; 2730 #endif 2731 #endif 2732 #ifdef ENABLE_BLE 2733 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2734 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2735 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2736 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2737 if (status != ERROR_CODE_SUCCESS){ 2738 hci_iso_stream_requested_finalize(); 2739 } 2740 break; 2741 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2742 // lookup BIG by state 2743 btstack_linked_list_iterator_t it; 2744 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2745 while (btstack_linked_list_iterator_has_next(&it)) { 2746 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2747 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2748 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2749 if (status == ERROR_CODE_SUCCESS){ 2750 big->state_vars.next_bis++; 2751 if (big->state_vars.next_bis == big->num_bis){ 2752 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2753 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2754 } else { 2755 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2756 } 2757 } else { 2758 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2759 big->state_vars.status = status; 2760 break; 2761 } 2762 return; 2763 } 2764 } 2765 break; 2766 } 2767 #endif 2768 #endif 2769 default: 2770 break; 2771 } 2772 } 2773 2774 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 2775 UNUSED(size); 2776 2777 // get num cmd packets - limit to 1 to reduce complexity 2778 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2779 2780 // get opcode and command status 2781 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 2782 2783 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 2784 uint8_t status = hci_event_command_status_get_status(packet); 2785 #endif 2786 2787 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2788 bd_addr_type_t addr_type; 2789 #endif 2790 2791 switch (opcode){ 2792 #ifdef ENABLE_CLASSIC 2793 case HCI_OPCODE_HCI_CREATE_CONNECTION: 2794 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 2795 #endif 2796 #ifdef ENABLE_LE_CENTRAL 2797 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 2798 #endif 2799 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2800 addr_type = hci_stack->outgoing_addr_type; 2801 2802 // reset outgoing address info 2803 memset(hci_stack->outgoing_addr, 0, 6); 2804 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2805 2806 // on error 2807 if (status != ERROR_CODE_SUCCESS){ 2808 #ifdef ENABLE_LE_CENTRAL 2809 if (hci_is_le_connection_type(addr_type)){ 2810 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2811 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2812 } 2813 #endif 2814 // error => outgoing connection failed 2815 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2816 if (conn != NULL){ 2817 hci_handle_connection_failed(conn, status); 2818 } 2819 } 2820 break; 2821 #endif 2822 #ifdef ENABLE_CLASSIC 2823 case HCI_OPCODE_HCI_INQUIRY: 2824 if (status == ERROR_CODE_SUCCESS) { 2825 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2826 } else { 2827 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2828 } 2829 break; 2830 #endif 2831 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2832 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2833 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2834 if (status == ERROR_CODE_SUCCESS){ 2835 hci_iso_stream_requested_confirm(); 2836 } else { 2837 hci_iso_stream_requested_finalize(); 2838 } 2839 break; 2840 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 2841 default: 2842 break; 2843 } 2844 } 2845 2846 #ifdef ENABLE_BLE 2847 static void event_handle_le_connection_complete(const uint8_t * packet){ 2848 bd_addr_t addr; 2849 bd_addr_type_t addr_type; 2850 hci_connection_t * conn; 2851 2852 // Connection management 2853 reverse_bd_addr(&packet[8], addr); 2854 addr_type = (bd_addr_type_t)packet[7]; 2855 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2856 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2857 2858 #ifdef ENABLE_LE_CENTRAL 2859 // handle error: error is reported only to the initiator -> outgoing connection 2860 if (packet[3]){ 2861 2862 // handle cancelled outgoing connection 2863 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2864 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2865 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2866 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2867 // reset state 2868 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2869 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2870 // get outgoing connection conn struct for direct connect 2871 conn = gap_get_outgoing_connection(); 2872 } 2873 2874 // outgoing le connection establishment is done 2875 if (conn){ 2876 // remove entry 2877 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2878 btstack_memory_hci_connection_free( conn ); 2879 } 2880 return; 2881 } 2882 #endif 2883 2884 // on success, both hosts receive connection complete event 2885 if (packet[6] == HCI_ROLE_MASTER){ 2886 #ifdef ENABLE_LE_CENTRAL 2887 // if we're master on an le connection, it was an outgoing connection and we're done with it 2888 // note: no hci_connection_t object exists yet for connect with whitelist 2889 if (hci_is_le_connection_type(addr_type)){ 2890 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2891 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2892 } 2893 #endif 2894 } else { 2895 #ifdef ENABLE_LE_PERIPHERAL 2896 // if we're slave, it was an incoming connection, advertisements have stopped 2897 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 2898 #endif 2899 } 2900 2901 // LE connections are auto-accepted, so just create a connection if there isn't one already 2902 if (!conn){ 2903 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2904 } 2905 2906 // no memory, sorry. 2907 if (!conn){ 2908 return; 2909 } 2910 2911 conn->state = OPEN; 2912 conn->role = packet[6]; 2913 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2914 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2915 2916 #ifdef ENABLE_LE_PERIPHERAL 2917 if (packet[6] == HCI_ROLE_SLAVE){ 2918 hci_update_advertisements_enabled_for_current_roles(); 2919 } 2920 #endif 2921 2922 // init unenhanced att bearer mtu 2923 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2924 conn->att_connection.mtu_exchanged = false; 2925 2926 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2927 2928 // restart timer 2929 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2930 // btstack_run_loop_add_timer(&conn->timeout); 2931 2932 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2933 2934 hci_emit_nr_connections_changed(); 2935 } 2936 #endif 2937 2938 #ifdef ENABLE_CLASSIC 2939 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){ 2940 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2941 // LEVEL_4 is tested by l2cap 2942 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2943 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2944 if (level >= LEVEL_3){ 2945 // MITM not possible without keyboard or display 2946 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2947 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2948 2949 // MITM possible if one side has keyboard and the other has keyboard or display 2950 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2951 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2952 2953 // MITM not possible if one side has only display and other side has no keyboard 2954 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2955 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2956 } 2957 // LEVEL 2 requires SSP, which is a given 2958 return true; 2959 } 2960 2961 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2962 uint16_t i; 2963 for (i=0; i < size ; i++){ 2964 if (data[i] != 0) { 2965 return false; 2966 } 2967 } 2968 return true; 2969 } 2970 2971 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2972 // get requested security level 2973 gap_security_level_t requested_security_level = conn->requested_security_level; 2974 if (hci_stack->gap_secure_connections_only_mode){ 2975 requested_security_level = LEVEL_4; 2976 } 2977 2978 // assess security: LEVEL 4 requires SC 2979 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2980 if ((requested_security_level == LEVEL_4) && 2981 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2982 !hci_remote_sc_enabled(conn)){ 2983 log_info("Level 4 required, but SC not supported -> abort"); 2984 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2985 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2986 return; 2987 } 2988 2989 // assess security based on io capabilities 2990 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2991 // responder: fully validate io caps of both sides as well as OOB data 2992 bool security_possible = false; 2993 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2994 2995 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2996 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2997 // so we merge the OOB data availability 2998 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2999 if (conn->classic_oob_c_192 != NULL){ 3000 have_oob_data |= 1; 3001 } 3002 if (conn->classic_oob_c_256 != NULL){ 3003 have_oob_data |= 2; 3004 } 3005 // for up to Level 3, either P-192 as well as P-256 will do 3006 // 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 3007 // if remote does not SC, we should not receive P-256 data either 3008 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3009 security_possible = true; 3010 } 3011 // for Level 4, P-256 is needed 3012 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3013 security_possible = true; 3014 } 3015 #endif 3016 3017 if (security_possible == false){ 3018 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3019 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3020 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3021 return; 3022 } 3023 } else { 3024 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3025 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3026 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3027 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3028 log_info("Level 3+ required, but no input/output -> abort"); 3029 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3030 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3031 return; 3032 } 3033 #endif 3034 #endif 3035 } 3036 3037 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3038 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3039 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3040 } else { 3041 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3042 } 3043 #endif 3044 } 3045 3046 #endif 3047 3048 static void event_handler(uint8_t *packet, uint16_t size){ 3049 3050 uint16_t event_length = packet[1]; 3051 3052 // assert packet is complete 3053 if (size != (event_length + 2u)){ 3054 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3055 return; 3056 } 3057 3058 hci_con_handle_t handle; 3059 hci_connection_t * conn; 3060 int i; 3061 3062 #ifdef ENABLE_CLASSIC 3063 hci_link_type_t link_type; 3064 bd_addr_t addr; 3065 bd_addr_type_t addr_type; 3066 #endif 3067 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3068 hci_iso_stream_t * iso_stream; 3069 le_audio_big_t * big; 3070 #endif 3071 3072 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3073 3074 switch (hci_event_packet_get_type(packet)) { 3075 3076 case HCI_EVENT_COMMAND_COMPLETE: 3077 handle_command_complete_event(packet, size); 3078 break; 3079 3080 case HCI_EVENT_COMMAND_STATUS: 3081 handle_command_status_event(packet, size); 3082 break; 3083 3084 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3085 if (size < 3) return; 3086 uint16_t num_handles = packet[2]; 3087 if (size != (3u + num_handles * 4u)) return; 3088 uint16_t offset = 3; 3089 for (i=0; i<num_handles;i++){ 3090 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3091 offset += 2u; 3092 uint16_t num_packets = little_endian_read_16(packet, offset); 3093 offset += 2u; 3094 3095 conn = hci_connection_for_handle(handle); 3096 if (!conn){ 3097 log_error("hci_number_completed_packet lists unused con handle %u", handle); 3098 continue; 3099 } 3100 3101 if (conn->num_packets_sent >= num_packets){ 3102 conn->num_packets_sent -= num_packets; 3103 } else { 3104 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3105 conn->num_packets_sent = 0; 3106 } 3107 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3108 3109 #ifdef ENABLE_CLASSIC 3110 // For SCO, we do the can_send_now_check here 3111 hci_notify_if_sco_can_send_now(); 3112 #endif 3113 } 3114 break; 3115 } 3116 3117 #ifdef ENABLE_CLASSIC 3118 case HCI_EVENT_FLUSH_OCCURRED: 3119 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3120 handle = hci_event_flush_occurred_get_handle(packet); 3121 conn = hci_connection_for_handle(handle); 3122 if (conn) { 3123 log_info("Flush occurred, disconnect 0x%04x", handle); 3124 conn->state = SEND_DISCONNECT; 3125 } 3126 break; 3127 3128 case HCI_EVENT_INQUIRY_COMPLETE: 3129 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3130 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3131 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3132 hci_emit_event(event, sizeof(event), 1); 3133 } 3134 break; 3135 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3136 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3137 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3138 } 3139 break; 3140 case HCI_EVENT_CONNECTION_REQUEST: 3141 reverse_bd_addr(&packet[2], addr); 3142 link_type = (hci_link_type_t) packet[11]; 3143 3144 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3145 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3146 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3147 bd_addr_copy(hci_stack->decline_addr, addr); 3148 break; 3149 } 3150 3151 if (hci_stack->gap_classic_accept_callback != NULL){ 3152 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3153 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3154 bd_addr_copy(hci_stack->decline_addr, addr); 3155 break; 3156 } 3157 } 3158 3159 // TODO: eval COD 8-10 3160 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3161 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3162 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3163 if (!conn) { 3164 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3165 } 3166 if (!conn) { 3167 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3168 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3169 bd_addr_copy(hci_stack->decline_addr, addr); 3170 hci_run(); 3171 // avoid event to higher layer 3172 return; 3173 } 3174 conn->role = HCI_ROLE_SLAVE; 3175 conn->state = RECEIVED_CONNECTION_REQUEST; 3176 // store info about eSCO 3177 if (link_type == HCI_LINK_TYPE_ESCO){ 3178 conn->remote_supported_features[0] |= 1; 3179 } 3180 hci_run(); 3181 break; 3182 3183 case HCI_EVENT_CONNECTION_COMPLETE: 3184 // Connection management 3185 reverse_bd_addr(&packet[5], addr); 3186 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3187 addr_type = BD_ADDR_TYPE_ACL; 3188 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3189 if (conn) { 3190 if (!packet[2]){ 3191 conn->state = OPEN; 3192 conn->con_handle = little_endian_read_16(packet, 3); 3193 3194 // trigger write supervision timeout if we're master 3195 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3196 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3197 } 3198 3199 // trigger write automatic flush timeout 3200 if (hci_stack->automatic_flush_timeout != 0){ 3201 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3202 } 3203 3204 // restart timer 3205 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3206 btstack_run_loop_add_timer(&conn->timeout); 3207 3208 // trigger remote features for dedicated bonding 3209 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3210 hci_trigger_remote_features_for_connection(conn); 3211 } 3212 3213 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3214 3215 hci_emit_nr_connections_changed(); 3216 } else { 3217 // connection failed 3218 hci_handle_connection_failed(conn, packet[2]); 3219 } 3220 } 3221 break; 3222 3223 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3224 reverse_bd_addr(&packet[5], addr); 3225 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3226 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3227 if (packet[2]){ 3228 // connection failed 3229 if (conn){ 3230 hci_handle_connection_failed(conn, packet[2]); 3231 } 3232 break; 3233 } 3234 if (!conn) { 3235 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3236 } 3237 if (!conn) { 3238 break; 3239 } 3240 conn->state = OPEN; 3241 conn->con_handle = little_endian_read_16(packet, 3); 3242 3243 #ifdef ENABLE_SCO_OVER_HCI 3244 // update SCO 3245 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3246 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3247 } 3248 // trigger can send now 3249 if (hci_have_usb_transport()){ 3250 hci_stack->sco_can_send_now = true; 3251 } 3252 #endif 3253 #ifdef HAVE_SCO_TRANSPORT 3254 // configure sco transport 3255 if (hci_stack->sco_transport != NULL){ 3256 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3257 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3258 } 3259 #endif 3260 break; 3261 3262 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3263 handle = little_endian_read_16(packet, 3); 3264 conn = hci_connection_for_handle(handle); 3265 if (!conn) break; 3266 if (!packet[2]){ 3267 const uint8_t * features = &packet[5]; 3268 hci_handle_remote_features_page_0(conn, features); 3269 3270 // read extended features if possible 3271 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3272 && ((conn->remote_supported_features[0] & 2) != 0)) { 3273 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3274 break; 3275 } 3276 } 3277 hci_handle_remote_features_received(conn); 3278 break; 3279 3280 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3281 handle = little_endian_read_16(packet, 3); 3282 conn = hci_connection_for_handle(handle); 3283 if (!conn) break; 3284 // status = ok, page = 1 3285 if (!packet[2]) { 3286 uint8_t page_number = packet[5]; 3287 uint8_t maximum_page_number = packet[6]; 3288 const uint8_t * features = &packet[7]; 3289 bool done = false; 3290 switch (page_number){ 3291 case 1: 3292 hci_handle_remote_features_page_1(conn, features); 3293 if (maximum_page_number >= 2){ 3294 // get Secure Connections (Controller) from Page 2 if available 3295 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3296 } else { 3297 // otherwise, assume SC (Controller) == SC (Host) 3298 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3299 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3300 } 3301 done = true; 3302 } 3303 break; 3304 case 2: 3305 hci_handle_remote_features_page_2(conn, features); 3306 done = true; 3307 break; 3308 default: 3309 break; 3310 } 3311 if (!done) break; 3312 } 3313 hci_handle_remote_features_received(conn); 3314 break; 3315 3316 case HCI_EVENT_LINK_KEY_REQUEST: 3317 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3318 hci_event_link_key_request_get_bd_addr(packet, addr); 3319 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3320 if (!conn) break; 3321 3322 // lookup link key in db if not cached 3323 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3324 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3325 } 3326 3327 // response sent by hci_run() 3328 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3329 #endif 3330 break; 3331 3332 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3333 hci_event_link_key_request_get_bd_addr(packet, addr); 3334 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3335 if (!conn) break; 3336 3337 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3338 3339 // CVE-2020-26555: ignore NULL link key 3340 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3341 if (btstack_is_null(&packet[8], 16)) break; 3342 3343 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3344 // Change Connection Encryption keeps link key type 3345 if (link_key_type != CHANGED_COMBINATION_KEY){ 3346 conn->link_key_type = link_key_type; 3347 } 3348 3349 // cache link key. link keys stored in little-endian format for legacy reasons 3350 memcpy(&conn->link_key, &packet[8], 16); 3351 3352 // only store link key: 3353 // - if bondable enabled 3354 if (hci_stack->bondable == false) break; 3355 // - if security level sufficient 3356 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3357 // - for SSP, also check if remote side requested bonding as well 3358 if (conn->link_key_type != COMBINATION_KEY){ 3359 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3360 if (!remote_bonding){ 3361 break; 3362 } 3363 } 3364 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3365 break; 3366 } 3367 3368 case HCI_EVENT_PIN_CODE_REQUEST: 3369 hci_event_pin_code_request_get_bd_addr(packet, addr); 3370 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3371 if (!conn) break; 3372 3373 hci_pairing_started(conn, false); 3374 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3375 if (!hci_stack->bondable ){ 3376 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3377 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3378 hci_run(); 3379 return; 3380 } 3381 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3382 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3383 log_info("Level 4 required, but SC not supported -> abort"); 3384 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3385 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3386 hci_run(); 3387 return; 3388 } 3389 break; 3390 3391 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3392 hci_event_io_capability_response_get_bd_addr(packet, addr); 3393 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3394 if (!conn) break; 3395 3396 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3397 hci_pairing_started(conn, true); 3398 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3399 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3400 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3401 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3402 #endif 3403 break; 3404 3405 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3406 hci_event_io_capability_response_get_bd_addr(packet, addr); 3407 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3408 if (!conn) break; 3409 3410 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3411 hci_connection_timestamp(conn); 3412 hci_pairing_started(conn, true); 3413 break; 3414 3415 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3416 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3417 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3418 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3419 if (!conn) break; 3420 3421 hci_connection_timestamp(conn); 3422 3423 hci_pairing_started(conn, true); 3424 3425 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3426 break; 3427 #endif 3428 3429 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3430 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3431 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3432 if (!conn) break; 3433 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3434 if (hci_stack->ssp_auto_accept){ 3435 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3436 }; 3437 } else { 3438 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3439 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3440 // don't forward event to app 3441 hci_run(); 3442 return; 3443 } 3444 break; 3445 3446 case HCI_EVENT_USER_PASSKEY_REQUEST: 3447 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3448 if (hci_stack->ssp_auto_accept){ 3449 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3450 }; 3451 break; 3452 3453 case HCI_EVENT_MODE_CHANGE: 3454 handle = hci_event_mode_change_get_handle(packet); 3455 conn = hci_connection_for_handle(handle); 3456 if (!conn) break; 3457 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3458 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3459 break; 3460 #endif 3461 3462 case HCI_EVENT_ENCRYPTION_CHANGE: 3463 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3464 handle = hci_event_encryption_change_get_connection_handle(packet); 3465 conn = hci_connection_for_handle(handle); 3466 if (!conn) break; 3467 if (hci_event_encryption_change_get_status(packet) == 0u) { 3468 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3469 if (encryption_enabled){ 3470 if (hci_is_le_connection(conn)){ 3471 // For LE, we accept connection as encrypted 3472 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3473 } 3474 #ifdef ENABLE_CLASSIC 3475 else { 3476 3477 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3478 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3479 bool connected_uses_aes_ccm = encryption_enabled == 2; 3480 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3481 log_info("SC during pairing, but only E0 now -> abort"); 3482 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3483 break; 3484 } 3485 3486 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3487 if (connected_uses_aes_ccm){ 3488 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3489 } 3490 3491 #ifdef ENABLE_TESTING_SUPPORT 3492 // work around for issue with PTS dongle 3493 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3494 #endif 3495 // validate encryption key size 3496 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3497 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3498 // already got encryption key size 3499 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3500 } else { 3501 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3502 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3503 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3504 } else { 3505 // if not, pretend everything is perfect 3506 hci_handle_read_encryption_key_size_complete(conn, 16); 3507 } 3508 } 3509 } 3510 #endif 3511 } else { 3512 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3513 } 3514 } else { 3515 uint8_t status = hci_event_encryption_change_get_status(packet); 3516 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3517 conn->bonding_flags &= ~BONDING_DEDICATED; 3518 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3519 conn->bonding_status = status; 3520 } 3521 } 3522 3523 break; 3524 3525 #ifdef ENABLE_CLASSIC 3526 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3527 handle = hci_event_authentication_complete_get_connection_handle(packet); 3528 conn = hci_connection_for_handle(handle); 3529 if (!conn) break; 3530 3531 // clear authentication active flag 3532 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3533 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3534 3535 // authenticated only if auth status == 0 3536 if (hci_event_authentication_complete_get_status(packet) == 0){ 3537 // authenticated 3538 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3539 3540 // If not already encrypted, start encryption 3541 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3542 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3543 break; 3544 } 3545 } 3546 3547 // emit updated security level 3548 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3549 break; 3550 3551 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3552 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3553 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3554 if (!conn) break; 3555 3556 // treat successfully paired connection as authenticated 3557 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3558 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3559 } 3560 3561 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3562 break; 3563 #endif 3564 3565 // HCI_EVENT_DISCONNECTION_COMPLETE 3566 // has been split, to first notify stack before shutting connection down 3567 // see end of function, too. 3568 case HCI_EVENT_DISCONNECTION_COMPLETE: 3569 if (packet[2]) break; // status != 0 3570 handle = little_endian_read_16(packet, 3); 3571 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3572 if (hci_stack->acl_fragmentation_total_size > 0u) { 3573 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3574 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3575 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3576 hci_stack->acl_fragmentation_total_size = 0; 3577 hci_stack->acl_fragmentation_pos = 0; 3578 if (release_buffer){ 3579 hci_release_packet_buffer(); 3580 } 3581 } 3582 } 3583 3584 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3585 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3586 if (hci_stack->iso_fragmentation_total_size > 0u) { 3587 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3588 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3589 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3590 hci_stack->iso_fragmentation_total_size = 0; 3591 hci_stack->iso_fragmentation_pos = 0; 3592 if (release_buffer){ 3593 hci_release_packet_buffer(); 3594 } 3595 } 3596 } 3597 3598 // finalize iso stream if handle matches 3599 iso_stream = hci_iso_stream_for_cis_handle(handle); 3600 if (iso_stream != NULL){ 3601 hci_iso_stream_finalize(iso_stream); 3602 break; 3603 } 3604 #endif 3605 3606 conn = hci_connection_for_handle(handle); 3607 if (!conn) break; 3608 #ifdef ENABLE_CLASSIC 3609 // pairing failed if it was ongoing 3610 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3611 #endif 3612 3613 // emit dedicatd bonding event 3614 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3615 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3616 } 3617 3618 // mark connection for shutdown, stop timers, reset state 3619 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3620 hci_connection_stop_timer(conn); 3621 hci_connection_init(conn); 3622 3623 #ifdef ENABLE_BLE 3624 #ifdef ENABLE_LE_PERIPHERAL 3625 // re-enable advertisements for le connections if active 3626 if (hci_is_le_connection(conn)){ 3627 hci_update_advertisements_enabled_for_current_roles(); 3628 } 3629 #endif 3630 #endif 3631 break; 3632 3633 case HCI_EVENT_HARDWARE_ERROR: 3634 log_error("Hardware Error: 0x%02x", packet[2]); 3635 if (hci_stack->hardware_error_callback){ 3636 (*hci_stack->hardware_error_callback)(packet[2]); 3637 } else { 3638 // if no special requests, just reboot stack 3639 hci_power_control_off(); 3640 hci_power_control_on(); 3641 } 3642 break; 3643 3644 #ifdef ENABLE_CLASSIC 3645 case HCI_EVENT_ROLE_CHANGE: 3646 if (packet[2]) break; // status != 0 3647 reverse_bd_addr(&packet[3], addr); 3648 addr_type = BD_ADDR_TYPE_ACL; 3649 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3650 if (!conn) break; 3651 conn->role = packet[9]; 3652 break; 3653 #endif 3654 3655 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3656 // release packet buffer only for asynchronous transport and if there are not further fragments 3657 if (hci_transport_synchronous()) { 3658 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3659 return; // instead of break: to avoid re-entering hci_run() 3660 } 3661 hci_stack->acl_fragmentation_tx_active = 0; 3662 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3663 hci_stack->iso_fragmentation_tx_active = 0; 3664 if (hci_stack->iso_fragmentation_total_size) break; 3665 #endif 3666 if (hci_stack->acl_fragmentation_total_size) break; 3667 hci_release_packet_buffer(); 3668 3669 // L2CAP receives this event via the hci_emit_event below 3670 3671 #ifdef ENABLE_CLASSIC 3672 // For SCO, we do the can_send_now_check here 3673 hci_notify_if_sco_can_send_now(); 3674 #endif 3675 break; 3676 3677 #ifdef ENABLE_CLASSIC 3678 case HCI_EVENT_SCO_CAN_SEND_NOW: 3679 // For SCO, we do the can_send_now_check here 3680 hci_stack->sco_can_send_now = true; 3681 hci_notify_if_sco_can_send_now(); 3682 return; 3683 3684 // explode inquriy results for easier consumption 3685 case HCI_EVENT_INQUIRY_RESULT: 3686 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3687 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3688 gap_inquiry_explode(packet, size); 3689 break; 3690 #endif 3691 3692 #ifdef ENABLE_BLE 3693 case HCI_EVENT_LE_META: 3694 switch (packet[2]){ 3695 #ifdef ENABLE_LE_CENTRAL 3696 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3697 if (!hci_stack->le_scanning_enabled) break; 3698 le_handle_advertisement_report(packet, size); 3699 break; 3700 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3701 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3702 if (!hci_stack->le_scanning_enabled) break; 3703 le_handle_extended_advertisement_report(packet, size); 3704 break; 3705 #endif 3706 #endif 3707 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3708 event_handle_le_connection_complete(packet); 3709 break; 3710 3711 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3712 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3713 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3714 conn = hci_connection_for_handle(handle); 3715 if (!conn) break; 3716 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3717 break; 3718 3719 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3720 // connection 3721 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3722 conn = hci_connection_for_handle(handle); 3723 if (conn) { 3724 // read arguments 3725 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3726 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3727 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3728 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3729 3730 // validate against current connection parameter range 3731 le_connection_parameter_range_t existing_range; 3732 gap_get_connection_parameter_range(&existing_range); 3733 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3734 if (update_parameter){ 3735 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3736 conn->le_conn_interval_min = le_conn_interval_min; 3737 conn->le_conn_interval_max = le_conn_interval_max; 3738 conn->le_conn_latency = le_conn_latency; 3739 conn->le_supervision_timeout = le_supervision_timeout; 3740 } else { 3741 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3742 } 3743 } 3744 break; 3745 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3746 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3747 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3748 conn = hci_connection_for_handle(handle); 3749 if (conn) { 3750 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3751 } 3752 break; 3753 #endif 3754 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3755 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3756 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3757 iso_stream = hci_iso_stream_for_cis_handle(handle); 3758 if (iso_stream){ 3759 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3760 if (status == ERROR_CODE_SUCCESS){ 3761 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3762 } else { 3763 hci_iso_stream_finalize(iso_stream); 3764 } 3765 } 3766 break; 3767 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 3768 big = hci_big_for_handle(packet[4]); 3769 if (big != NULL){ 3770 uint8_t status = packet[3]; 3771 if (status == ERROR_CODE_SUCCESS){ 3772 // store bis_con_handles and trigger iso path setup 3773 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 3774 uint8_t i; 3775 for (i=0;i<num_bis;i++){ 3776 big->bis_con_handles[i] = little_endian_read_16(packet, 21 + (2 * i)); 3777 } 3778 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 3779 big->state_vars.next_bis = 0; 3780 } else { 3781 // create BIG failed 3782 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3783 hci_emit_big_created(big, status); 3784 } 3785 } 3786 break; 3787 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 3788 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 3789 if (big != NULL){ 3790 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3791 switch (big->state){ 3792 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 3793 hci_emit_big_created(big, big->state_vars.status); 3794 break; 3795 default: 3796 hci_emit_big_terminated(big); 3797 break; 3798 } 3799 } 3800 break; 3801 #endif 3802 default: 3803 break; 3804 } 3805 break; 3806 #endif 3807 case HCI_EVENT_VENDOR_SPECIFIC: 3808 // Vendor specific commands often create vendor specific event instead of num completed packets 3809 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3810 switch (hci_stack->manufacturer){ 3811 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3812 hci_stack->num_cmd_packets = 1; 3813 break; 3814 default: 3815 break; 3816 } 3817 break; 3818 default: 3819 break; 3820 } 3821 3822 handle_event_for_current_stack_state(packet, size); 3823 3824 // notify upper stack 3825 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3826 3827 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3828 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3829 handle = little_endian_read_16(packet, 3); 3830 hci_connection_t * aConn = hci_connection_for_handle(handle); 3831 // discard connection if app did not trigger a reconnect in the event handler 3832 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3833 hci_shutdown_connection(aConn); 3834 } 3835 } 3836 3837 // execute main loop 3838 hci_run(); 3839 } 3840 3841 #ifdef ENABLE_CLASSIC 3842 3843 #ifdef ENABLE_SCO_OVER_HCI 3844 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3845 static void sco_schedule_tx(hci_connection_t * conn); 3846 3847 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3848 log_debug("SCO TX Timeout"); 3849 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3850 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3851 if (!conn) return; 3852 3853 // trigger send 3854 conn->sco_tx_ready = 1; 3855 // extra packet if CVSD but SCO buffer is too short 3856 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3857 conn->sco_tx_ready++; 3858 } 3859 hci_notify_if_sco_can_send_now(); 3860 } 3861 3862 3863 #define SCO_TX_AFTER_RX_MS (6) 3864 3865 static void sco_schedule_tx(hci_connection_t * conn){ 3866 3867 uint32_t now = btstack_run_loop_get_time_ms(); 3868 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3869 int time_delta_ms = sco_tx_ms - now; 3870 3871 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3872 3873 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3874 btstack_run_loop_remove_timer(timer); 3875 btstack_run_loop_set_timer(timer, time_delta_ms); 3876 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3877 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3878 btstack_run_loop_add_timer(timer); 3879 } 3880 #endif 3881 3882 static void sco_handler(uint8_t * packet, uint16_t size){ 3883 // lookup connection struct 3884 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3885 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3886 if (!conn) return; 3887 3888 #ifdef ENABLE_SCO_OVER_HCI 3889 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3890 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3891 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3892 packet[2] = 0x3c; 3893 memmove(&packet[3], &packet[23], 63); 3894 size = 63; 3895 } 3896 } 3897 3898 if (hci_have_usb_transport()){ 3899 // Nothing to do 3900 } else { 3901 // 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); 3902 if (hci_stack->synchronous_flow_control_enabled == 0){ 3903 uint32_t now = btstack_run_loop_get_time_ms(); 3904 3905 if (!conn->sco_rx_valid){ 3906 // ignore first 10 packets 3907 conn->sco_rx_count++; 3908 // log_debug("sco rx count %u", conn->sco_rx_count); 3909 if (conn->sco_rx_count == 10) { 3910 // use first timestamp as is and pretent it just started 3911 conn->sco_rx_ms = now; 3912 conn->sco_rx_valid = 1; 3913 conn->sco_rx_count = 0; 3914 sco_schedule_tx(conn); 3915 } 3916 } else { 3917 // track expected arrival timme 3918 conn->sco_rx_count++; 3919 conn->sco_rx_ms += 7; 3920 int delta = (int32_t) (now - conn->sco_rx_ms); 3921 if (delta > 0){ 3922 conn->sco_rx_ms++; 3923 } 3924 // log_debug("sco rx %u", conn->sco_rx_ms); 3925 sco_schedule_tx(conn); 3926 } 3927 } 3928 } 3929 #endif 3930 3931 // deliver to app 3932 if (hci_stack->sco_packet_handler) { 3933 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3934 } 3935 3936 #ifdef HAVE_SCO_TRANSPORT 3937 // We can send one packet for each received packet 3938 conn->sco_tx_ready++; 3939 hci_notify_if_sco_can_send_now(); 3940 #endif 3941 3942 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3943 conn->num_packets_completed++; 3944 hci_stack->host_completed_packets = 1; 3945 hci_run(); 3946 #endif 3947 } 3948 #endif 3949 3950 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3951 hci_dump_packet(packet_type, 1, packet, size); 3952 switch (packet_type) { 3953 case HCI_EVENT_PACKET: 3954 event_handler(packet, size); 3955 break; 3956 case HCI_ACL_DATA_PACKET: 3957 acl_handler(packet, size); 3958 break; 3959 #ifdef ENABLE_CLASSIC 3960 case HCI_SCO_DATA_PACKET: 3961 sco_handler(packet, size); 3962 break; 3963 #endif 3964 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3965 case HCI_ISO_DATA_PACKET: 3966 hci_iso_packet_handler(packet, size); 3967 break; 3968 #endif 3969 default: 3970 break; 3971 } 3972 } 3973 3974 /** 3975 * @brief Add event packet handler. 3976 */ 3977 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3978 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3979 } 3980 3981 /** 3982 * @brief Remove event packet handler. 3983 */ 3984 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3985 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3986 } 3987 3988 /** Register HCI packet handlers */ 3989 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3990 hci_stack->acl_packet_handler = handler; 3991 } 3992 3993 #ifdef ENABLE_CLASSIC 3994 /** 3995 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3996 */ 3997 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3998 hci_stack->sco_packet_handler = handler; 3999 } 4000 #endif 4001 4002 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4003 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4004 hci_stack->iso_packet_handler = handler; 4005 } 4006 #endif 4007 4008 static void hci_state_reset(void){ 4009 // no connections yet 4010 hci_stack->connections = NULL; 4011 4012 // keep discoverable/connectable as this has been requested by the client(s) 4013 // hci_stack->discoverable = 0; 4014 // hci_stack->connectable = 0; 4015 // hci_stack->bondable = 1; 4016 // hci_stack->own_addr_type = 0; 4017 4018 // buffer is free 4019 hci_stack->hci_packet_buffer_reserved = false; 4020 4021 // no pending cmds 4022 hci_stack->decline_reason = 0; 4023 4024 hci_stack->secure_connections_active = false; 4025 4026 #ifdef ENABLE_CLASSIC 4027 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4028 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4029 4030 hci_stack->gap_tasks_classic = 4031 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4032 GAP_TASK_SET_CLASS_OF_DEVICE | 4033 GAP_TASK_SET_LOCAL_NAME | 4034 GAP_TASK_SET_EIR_DATA | 4035 GAP_TASK_WRITE_SCAN_ENABLE | 4036 GAP_TASK_WRITE_PAGE_TIMEOUT; 4037 #endif 4038 4039 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4040 hci_stack->classic_read_local_oob_data = false; 4041 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4042 #endif 4043 4044 // LE 4045 #ifdef ENABLE_BLE 4046 memset(hci_stack->le_random_address, 0, 6); 4047 hci_stack->le_random_address_set = 0; 4048 #endif 4049 #ifdef ENABLE_LE_CENTRAL 4050 hci_stack->le_scanning_active = false; 4051 hci_stack->le_scanning_param_update = true; 4052 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4053 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4054 hci_stack->le_whitelist_capacity = 0; 4055 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4056 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4057 #endif 4058 #endif 4059 #ifdef ENABLE_LE_PERIPHERAL 4060 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4061 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4062 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4063 } 4064 if (hci_stack->le_advertisements_data != NULL){ 4065 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4066 } 4067 #endif 4068 } 4069 4070 #ifdef ENABLE_CLASSIC 4071 /** 4072 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4073 */ 4074 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4075 // store and open remote device db 4076 hci_stack->link_key_db = link_key_db; 4077 if (hci_stack->link_key_db) { 4078 hci_stack->link_key_db->open(); 4079 } 4080 } 4081 #endif 4082 4083 void hci_init(const hci_transport_t *transport, const void *config){ 4084 4085 #ifdef HAVE_MALLOC 4086 if (!hci_stack) { 4087 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4088 } 4089 #else 4090 hci_stack = &hci_stack_static; 4091 #endif 4092 memset(hci_stack, 0, sizeof(hci_stack_t)); 4093 4094 // reference to use transport layer implementation 4095 hci_stack->hci_transport = transport; 4096 4097 // reference to used config 4098 hci_stack->config = config; 4099 4100 // setup pointer for outgoing packet buffer 4101 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4102 4103 // max acl payload size defined in config.h 4104 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4105 4106 // register packet handlers with transport 4107 transport->register_packet_handler(&packet_handler); 4108 4109 hci_stack->state = HCI_STATE_OFF; 4110 4111 // class of device 4112 hci_stack->class_of_device = 0x007a020c; // Smartphone 4113 4114 // bondable by default 4115 hci_stack->bondable = 1; 4116 4117 #ifdef ENABLE_CLASSIC 4118 // classic name 4119 hci_stack->local_name = default_classic_name; 4120 4121 // Master slave policy 4122 hci_stack->master_slave_policy = 1; 4123 4124 // Allow Role Switch 4125 hci_stack->allow_role_switch = 1; 4126 4127 // Default / minimum security level = 2 4128 hci_stack->gap_security_level = LEVEL_2; 4129 4130 // Default Security Mode 4 4131 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4132 4133 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4134 hci_stack->gap_required_encyrption_key_size = 7; 4135 4136 // Link Supervision Timeout 4137 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4138 4139 #endif 4140 4141 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4142 hci_stack->ssp_enable = 1; 4143 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4144 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4145 hci_stack->ssp_auto_accept = 1; 4146 4147 // Secure Connections: enable (requires support from Controller) 4148 hci_stack->secure_connections_enable = true; 4149 4150 // voice setting - signed 16 bit pcm data with CVSD over the air 4151 hci_stack->sco_voice_setting = 0x60; 4152 4153 #ifdef ENABLE_LE_CENTRAL 4154 // connection parameter to use for outgoing connections 4155 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4156 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4157 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4158 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4159 hci_stack->le_connection_latency = 4; // 4 4160 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4161 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4162 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4163 4164 // default LE Scanning 4165 hci_stack->le_scan_type = 0x1; // active 4166 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4167 hci_stack->le_scan_window = 0x30; // 30 ms 4168 #endif 4169 4170 #ifdef ENABLE_LE_PERIPHERAL 4171 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4172 #endif 4173 4174 // connection parameter range used to answer connection parameter update requests in l2cap 4175 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4176 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4177 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4178 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4179 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4180 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4181 4182 hci_state_reset(); 4183 } 4184 4185 void hci_deinit(void){ 4186 btstack_run_loop_remove_timer(&hci_stack->timeout); 4187 #ifdef HAVE_MALLOC 4188 if (hci_stack) { 4189 free(hci_stack); 4190 } 4191 #endif 4192 hci_stack = NULL; 4193 4194 #ifdef ENABLE_CLASSIC 4195 disable_l2cap_timeouts = 0; 4196 #endif 4197 } 4198 4199 /** 4200 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4201 */ 4202 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4203 hci_stack->chipset = chipset_driver; 4204 4205 // reset chipset driver - init is also called on power_up 4206 if (hci_stack->chipset && hci_stack->chipset->init){ 4207 hci_stack->chipset->init(hci_stack->config); 4208 } 4209 } 4210 4211 /** 4212 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4213 */ 4214 void hci_set_control(const btstack_control_t *hardware_control){ 4215 // references to used control implementation 4216 hci_stack->control = hardware_control; 4217 // init with transport config 4218 hardware_control->init(hci_stack->config); 4219 } 4220 4221 static void hci_discard_connections(void){ 4222 btstack_linked_list_iterator_t lit; 4223 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 4224 while (btstack_linked_list_iterator_has_next(&lit)){ 4225 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4226 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 4227 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4228 hci_shutdown_connection(connection); 4229 } 4230 } 4231 4232 void hci_close(void){ 4233 4234 #ifdef ENABLE_CLASSIC 4235 // close remote device db 4236 if (hci_stack->link_key_db) { 4237 hci_stack->link_key_db->close(); 4238 } 4239 #endif 4240 4241 hci_discard_connections(); 4242 4243 hci_power_control(HCI_POWER_OFF); 4244 4245 #ifdef HAVE_MALLOC 4246 free(hci_stack); 4247 #endif 4248 hci_stack = NULL; 4249 } 4250 4251 #ifdef HAVE_SCO_TRANSPORT 4252 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4253 hci_stack->sco_transport = sco_transport; 4254 sco_transport->register_packet_handler(&packet_handler); 4255 } 4256 #endif 4257 4258 #ifdef ENABLE_CLASSIC 4259 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4260 // validate ranage and set 4261 if (encryption_key_size < 7) return; 4262 if (encryption_key_size > 16) return; 4263 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4264 } 4265 4266 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4267 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4268 hci_stack->gap_security_mode = security_mode; 4269 return ERROR_CODE_SUCCESS; 4270 } else { 4271 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4272 } 4273 } 4274 4275 gap_security_mode_t gap_get_security_mode(void){ 4276 return hci_stack->gap_security_mode; 4277 } 4278 4279 void gap_set_security_level(gap_security_level_t security_level){ 4280 hci_stack->gap_security_level = security_level; 4281 } 4282 4283 gap_security_level_t gap_get_security_level(void){ 4284 if (hci_stack->gap_secure_connections_only_mode){ 4285 return LEVEL_4; 4286 } 4287 return hci_stack->gap_security_level; 4288 } 4289 4290 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4291 hci_stack->gap_minimal_service_security_level = security_level; 4292 } 4293 4294 void gap_set_secure_connections_only_mode(bool enable){ 4295 hci_stack->gap_secure_connections_only_mode = enable; 4296 } 4297 4298 bool gap_get_secure_connections_only_mode(void){ 4299 return hci_stack->gap_secure_connections_only_mode; 4300 } 4301 #endif 4302 4303 #ifdef ENABLE_CLASSIC 4304 void gap_set_class_of_device(uint32_t class_of_device){ 4305 hci_stack->class_of_device = class_of_device; 4306 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4307 hci_run(); 4308 } 4309 4310 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4311 hci_stack->default_link_policy_settings = default_link_policy_settings; 4312 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4313 hci_run(); 4314 } 4315 4316 void gap_set_allow_role_switch(bool allow_role_switch){ 4317 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4318 } 4319 4320 uint8_t hci_get_allow_role_switch(void){ 4321 return hci_stack->allow_role_switch; 4322 } 4323 4324 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4325 hci_stack->link_supervision_timeout = link_supervision_timeout; 4326 } 4327 4328 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4329 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4330 } 4331 4332 uint16_t hci_automatic_flush_timeout(void){ 4333 return hci_stack->automatic_flush_timeout; 4334 } 4335 4336 void hci_disable_l2cap_timeout_check(void){ 4337 disable_l2cap_timeouts = 1; 4338 } 4339 #endif 4340 4341 #ifndef HAVE_HOST_CONTROLLER_API 4342 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4343 void hci_set_bd_addr(bd_addr_t addr){ 4344 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4345 hci_stack->custom_bd_addr_set = 1; 4346 } 4347 #endif 4348 4349 // State-Module-Driver overview 4350 // state module low-level 4351 // HCI_STATE_OFF off close 4352 // HCI_STATE_INITIALIZING, on open 4353 // HCI_STATE_WORKING, on open 4354 // HCI_STATE_HALTING, on open 4355 // HCI_STATE_SLEEPING, off/sleep close 4356 // HCI_STATE_FALLING_ASLEEP on open 4357 4358 static int hci_power_control_on(void){ 4359 4360 // power on 4361 int err = 0; 4362 if (hci_stack->control && hci_stack->control->on){ 4363 err = (*hci_stack->control->on)(); 4364 } 4365 if (err){ 4366 log_error( "POWER_ON failed"); 4367 hci_emit_hci_open_failed(); 4368 return err; 4369 } 4370 4371 // int chipset driver 4372 if (hci_stack->chipset && hci_stack->chipset->init){ 4373 hci_stack->chipset->init(hci_stack->config); 4374 } 4375 4376 // init transport 4377 if (hci_stack->hci_transport->init){ 4378 hci_stack->hci_transport->init(hci_stack->config); 4379 } 4380 4381 // open transport 4382 err = hci_stack->hci_transport->open(); 4383 if (err){ 4384 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4385 if (hci_stack->control && hci_stack->control->off){ 4386 (*hci_stack->control->off)(); 4387 } 4388 hci_emit_hci_open_failed(); 4389 return err; 4390 } 4391 return 0; 4392 } 4393 4394 static void hci_power_control_off(void){ 4395 4396 log_info("hci_power_control_off"); 4397 4398 // close low-level device 4399 hci_stack->hci_transport->close(); 4400 4401 log_info("hci_power_control_off - hci_transport closed"); 4402 4403 // power off 4404 if (hci_stack->control && hci_stack->control->off){ 4405 (*hci_stack->control->off)(); 4406 } 4407 4408 log_info("hci_power_control_off - control closed"); 4409 4410 hci_stack->state = HCI_STATE_OFF; 4411 } 4412 4413 static void hci_power_control_sleep(void){ 4414 4415 log_info("hci_power_control_sleep"); 4416 4417 #if 0 4418 // don't close serial port during sleep 4419 4420 // close low-level device 4421 hci_stack->hci_transport->close(hci_stack->config); 4422 #endif 4423 4424 // sleep mode 4425 if (hci_stack->control && hci_stack->control->sleep){ 4426 (*hci_stack->control->sleep)(); 4427 } 4428 4429 hci_stack->state = HCI_STATE_SLEEPING; 4430 } 4431 4432 static int hci_power_control_wake(void){ 4433 4434 log_info("hci_power_control_wake"); 4435 4436 // wake on 4437 if (hci_stack->control && hci_stack->control->wake){ 4438 (*hci_stack->control->wake)(); 4439 } 4440 4441 #if 0 4442 // open low-level device 4443 int err = hci_stack->hci_transport->open(hci_stack->config); 4444 if (err){ 4445 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4446 if (hci_stack->control && hci_stack->control->off){ 4447 (*hci_stack->control->off)(); 4448 } 4449 hci_emit_hci_open_failed(); 4450 return err; 4451 } 4452 #endif 4453 4454 return 0; 4455 } 4456 4457 static void hci_power_enter_initializing_state(void){ 4458 // set up state machine 4459 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4460 hci_stack->hci_packet_buffer_reserved = false; 4461 hci_stack->state = HCI_STATE_INITIALIZING; 4462 hci_stack->substate = HCI_INIT_SEND_RESET; 4463 } 4464 4465 static void hci_power_enter_halting_state(void){ 4466 #ifdef ENABLE_BLE 4467 hci_whitelist_free(); 4468 #endif 4469 // see hci_run 4470 hci_stack->state = HCI_STATE_HALTING; 4471 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4472 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4473 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4474 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4475 btstack_run_loop_add_timer(&hci_stack->timeout); 4476 } 4477 4478 // returns error 4479 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4480 int err; 4481 switch (power_mode){ 4482 case HCI_POWER_ON: 4483 err = hci_power_control_on(); 4484 if (err != 0) { 4485 log_error("hci_power_control_on() error %d", err); 4486 return err; 4487 } 4488 hci_power_enter_initializing_state(); 4489 break; 4490 case HCI_POWER_OFF: 4491 // do nothing 4492 break; 4493 case HCI_POWER_SLEEP: 4494 // do nothing (with SLEEP == OFF) 4495 break; 4496 default: 4497 btstack_assert(false); 4498 break; 4499 } 4500 return ERROR_CODE_SUCCESS; 4501 } 4502 4503 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4504 switch (power_mode){ 4505 case HCI_POWER_ON: 4506 // do nothing 4507 break; 4508 case HCI_POWER_OFF: 4509 // no connections yet, just turn it off 4510 hci_power_control_off(); 4511 break; 4512 case HCI_POWER_SLEEP: 4513 // no connections yet, just turn it off 4514 hci_power_control_sleep(); 4515 break; 4516 default: 4517 btstack_assert(false); 4518 break; 4519 } 4520 return ERROR_CODE_SUCCESS; 4521 } 4522 4523 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4524 switch (power_mode){ 4525 case HCI_POWER_ON: 4526 // do nothing 4527 break; 4528 case HCI_POWER_OFF: 4529 hci_power_enter_halting_state(); 4530 break; 4531 case HCI_POWER_SLEEP: 4532 // see hci_run 4533 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4534 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4535 break; 4536 default: 4537 btstack_assert(false); 4538 break; 4539 } 4540 return ERROR_CODE_SUCCESS; 4541 } 4542 4543 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4544 switch (power_mode){ 4545 case HCI_POWER_ON: 4546 hci_power_enter_initializing_state(); 4547 break; 4548 case HCI_POWER_OFF: 4549 // do nothing 4550 break; 4551 case HCI_POWER_SLEEP: 4552 // see hci_run 4553 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4554 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4555 break; 4556 default: 4557 btstack_assert(false); 4558 break; 4559 } 4560 return ERROR_CODE_SUCCESS; 4561 } 4562 4563 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4564 switch (power_mode){ 4565 case HCI_POWER_ON: 4566 hci_power_enter_initializing_state(); 4567 break; 4568 case HCI_POWER_OFF: 4569 hci_power_enter_halting_state(); 4570 break; 4571 case HCI_POWER_SLEEP: 4572 // do nothing 4573 break; 4574 default: 4575 btstack_assert(false); 4576 break; 4577 } 4578 return ERROR_CODE_SUCCESS; 4579 } 4580 4581 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4582 int err; 4583 switch (power_mode){ 4584 case HCI_POWER_ON: 4585 err = hci_power_control_wake(); 4586 if (err) return err; 4587 hci_power_enter_initializing_state(); 4588 break; 4589 case HCI_POWER_OFF: 4590 hci_power_enter_halting_state(); 4591 break; 4592 case HCI_POWER_SLEEP: 4593 // do nothing 4594 break; 4595 default: 4596 btstack_assert(false); 4597 break; 4598 } 4599 return ERROR_CODE_SUCCESS; 4600 } 4601 4602 int hci_power_control(HCI_POWER_MODE power_mode){ 4603 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4604 int err = 0; 4605 switch (hci_stack->state){ 4606 case HCI_STATE_OFF: 4607 err = hci_power_control_state_off(power_mode); 4608 break; 4609 case HCI_STATE_INITIALIZING: 4610 err = hci_power_control_state_initializing(power_mode); 4611 break; 4612 case HCI_STATE_WORKING: 4613 err = hci_power_control_state_working(power_mode); 4614 break; 4615 case HCI_STATE_HALTING: 4616 err = hci_power_control_state_halting(power_mode); 4617 break; 4618 case HCI_STATE_FALLING_ASLEEP: 4619 err = hci_power_control_state_falling_asleep(power_mode); 4620 break; 4621 case HCI_STATE_SLEEPING: 4622 err = hci_power_control_state_sleeping(power_mode); 4623 break; 4624 default: 4625 btstack_assert(false); 4626 break; 4627 } 4628 if (err != 0){ 4629 return err; 4630 } 4631 4632 // create internal event 4633 hci_emit_state(); 4634 4635 // trigger next/first action 4636 hci_run(); 4637 4638 return 0; 4639 } 4640 4641 4642 static void hci_halting_run(void) { 4643 4644 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4645 4646 hci_connection_t *connection; 4647 #ifdef ENABLE_BLE 4648 #ifdef ENABLE_LE_PERIPHERAL 4649 bool stop_advertismenets; 4650 #endif 4651 #endif 4652 4653 switch (hci_stack->substate) { 4654 case HCI_HALTING_CLASSIC_STOP: 4655 #ifdef ENABLE_CLASSIC 4656 if (!hci_can_send_command_packet_now()) return; 4657 4658 if (hci_stack->connectable || hci_stack->discoverable){ 4659 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4660 hci_send_cmd(&hci_write_scan_enable, 0); 4661 return; 4662 } 4663 #endif 4664 /* fall through */ 4665 4666 case HCI_HALTING_LE_ADV_STOP: 4667 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4668 4669 #ifdef ENABLE_BLE 4670 #ifdef ENABLE_LE_PERIPHERAL 4671 if (!hci_can_send_command_packet_now()) return; 4672 4673 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4674 4675 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4676 if (hci_extended_advertising_supported()){ 4677 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4678 btstack_linked_list_iterator_t it; 4679 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4680 // stop all periodic advertisements and check if an extended set is active 4681 while (btstack_linked_list_iterator_has_next(&it)){ 4682 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4683 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4684 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4685 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4686 return; 4687 } 4688 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4689 stop_advertismenets = true; 4690 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4691 } 4692 } 4693 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4694 if (stop_advertismenets){ 4695 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4696 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4697 return; 4698 } 4699 } 4700 else 4701 #else 4702 { 4703 if (stop_advertismenets) { 4704 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4705 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4706 return; 4707 } 4708 } 4709 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4710 #endif /* ENABLE_LE_PERIPHERAL */ 4711 #endif /* ENABLE_BLE */ 4712 4713 /* fall through */ 4714 4715 case HCI_HALTING_LE_SCAN_STOP: 4716 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4717 if (!hci_can_send_command_packet_now()) return; 4718 4719 #ifdef ENABLE_BLE 4720 #ifdef ENABLE_LE_CENTRAL 4721 if (hci_stack->le_scanning_active){ 4722 hci_le_scan_stop(); 4723 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4724 return; 4725 } 4726 #endif 4727 #endif 4728 4729 /* fall through */ 4730 4731 case HCI_HALTING_DISCONNECT_ALL: 4732 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4733 if (!hci_can_send_command_packet_now()) return; 4734 4735 // close all open connections 4736 connection = (hci_connection_t *) hci_stack->connections; 4737 if (connection) { 4738 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4739 4740 // check state 4741 if (connection->state == SENT_DISCONNECT) return; 4742 connection->state = SENT_DISCONNECT; 4743 4744 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4745 4746 // finally, send the disconnect command 4747 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4748 return; 4749 } 4750 4751 btstack_run_loop_remove_timer(&hci_stack->timeout); 4752 4753 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4754 log_info("HCI_STATE_HALTING: wait 50 ms"); 4755 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 4756 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4757 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4758 btstack_run_loop_add_timer(&hci_stack->timeout); 4759 break; 4760 4761 case HCI_HALTING_CLOSE: 4762 // close left over connections (that had not been properly closed before) 4763 hci_discard_connections(); 4764 4765 log_info("HCI_STATE_HALTING, calling off"); 4766 4767 // switch mode 4768 hci_power_control_off(); 4769 4770 log_info("HCI_STATE_HALTING, emitting state"); 4771 hci_emit_state(); 4772 log_info("HCI_STATE_HALTING, done"); 4773 break; 4774 4775 case HCI_HALTING_W4_CLOSE_TIMER: 4776 // keep waiting 4777 4778 break; 4779 default: 4780 break; 4781 } 4782 }; 4783 4784 static void hci_falling_asleep_run(void){ 4785 hci_connection_t * connection; 4786 switch(hci_stack->substate) { 4787 case HCI_FALLING_ASLEEP_DISCONNECT: 4788 log_info("HCI_STATE_FALLING_ASLEEP"); 4789 // close all open connections 4790 connection = (hci_connection_t *) hci_stack->connections; 4791 if (connection){ 4792 4793 // send disconnect 4794 if (!hci_can_send_command_packet_now()) return; 4795 4796 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4797 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4798 4799 // send disconnected event right away - causes higher layer connections to get closed, too. 4800 hci_shutdown_connection(connection); 4801 return; 4802 } 4803 4804 if (hci_classic_supported()){ 4805 // disable page and inquiry scan 4806 if (!hci_can_send_command_packet_now()) return; 4807 4808 log_info("HCI_STATE_HALTING, disabling inq scans"); 4809 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4810 4811 // continue in next sub state 4812 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4813 break; 4814 } 4815 4816 /* fall through */ 4817 4818 case HCI_FALLING_ASLEEP_COMPLETE: 4819 log_info("HCI_STATE_HALTING, calling sleep"); 4820 // switch mode 4821 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4822 hci_emit_state(); 4823 break; 4824 4825 default: 4826 break; 4827 } 4828 } 4829 4830 #ifdef ENABLE_CLASSIC 4831 4832 static void hci_update_scan_enable(void){ 4833 // 2 = page scan, 1 = inq scan 4834 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4835 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4836 hci_run(); 4837 } 4838 4839 void gap_discoverable_control(uint8_t enable){ 4840 if (enable) enable = 1; // normalize argument 4841 4842 if (hci_stack->discoverable == enable){ 4843 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 4844 return; 4845 } 4846 4847 hci_stack->discoverable = enable; 4848 hci_update_scan_enable(); 4849 } 4850 4851 void gap_connectable_control(uint8_t enable){ 4852 if (enable) enable = 1; // normalize argument 4853 4854 // don't emit event 4855 if (hci_stack->connectable == enable) return; 4856 4857 hci_stack->connectable = enable; 4858 hci_update_scan_enable(); 4859 } 4860 #endif 4861 4862 void gap_local_bd_addr(bd_addr_t address_buffer){ 4863 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4864 } 4865 4866 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4867 static void hci_host_num_completed_packets(void){ 4868 4869 // create packet manually as arrays are not supported and num_commands should not get reduced 4870 hci_reserve_packet_buffer(); 4871 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4872 4873 uint16_t size = 0; 4874 uint16_t num_handles = 0; 4875 packet[size++] = 0x35; 4876 packet[size++] = 0x0c; 4877 size++; // skip param len 4878 size++; // skip num handles 4879 4880 // add { handle, packets } entries 4881 btstack_linked_item_t * it; 4882 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4883 hci_connection_t * connection = (hci_connection_t *) it; 4884 if (connection->num_packets_completed){ 4885 little_endian_store_16(packet, size, connection->con_handle); 4886 size += 2; 4887 little_endian_store_16(packet, size, connection->num_packets_completed); 4888 size += 2; 4889 // 4890 num_handles++; 4891 connection->num_packets_completed = 0; 4892 } 4893 } 4894 4895 packet[2] = size - 3; 4896 packet[3] = num_handles; 4897 4898 hci_stack->host_completed_packets = 0; 4899 4900 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4901 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4902 4903 // release packet buffer for synchronous transport implementations 4904 if (hci_transport_synchronous()){ 4905 hci_release_packet_buffer(); 4906 hci_emit_transport_packet_sent(); 4907 } 4908 } 4909 #endif 4910 4911 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4912 UNUSED(ds); 4913 hci_stack->substate = HCI_HALTING_CLOSE; 4914 // allow packet handlers to defer final shutdown 4915 hci_emit_state(); 4916 hci_run(); 4917 } 4918 4919 static bool hci_run_acl_fragments(void){ 4920 if (hci_stack->acl_fragmentation_total_size > 0u) { 4921 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4922 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4923 if (connection) { 4924 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4925 hci_send_acl_packet_fragments(connection); 4926 return true; 4927 } 4928 } else { 4929 // connection gone -> discard further fragments 4930 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4931 hci_stack->acl_fragmentation_total_size = 0; 4932 hci_stack->acl_fragmentation_pos = 0; 4933 } 4934 } 4935 return false; 4936 } 4937 4938 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4939 static bool hci_run_iso_fragments(void){ 4940 if (hci_stack->iso_fragmentation_total_size > 0u) { 4941 // TODO: flow control 4942 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 4943 hci_send_iso_packet_fragments(); 4944 return true; 4945 } 4946 } 4947 return false; 4948 } 4949 #endif 4950 4951 #ifdef ENABLE_CLASSIC 4952 4953 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4954 static bool hci_classic_operation_active(void) { 4955 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 4956 return true; 4957 } 4958 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 4959 return true; 4960 } 4961 btstack_linked_item_t * it; 4962 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 4963 hci_connection_t *connection = (hci_connection_t *) it; 4964 switch (connection->state) { 4965 case SENT_CREATE_CONNECTION: 4966 case SENT_CANCEL_CONNECTION: 4967 case SENT_DISCONNECT: 4968 return true; 4969 default: 4970 break; 4971 } 4972 } 4973 return false; 4974 } 4975 #endif 4976 4977 static bool hci_run_general_gap_classic(void){ 4978 4979 // assert stack is working and classic is active 4980 if (hci_classic_supported() == false) return false; 4981 if (hci_stack->state != HCI_STATE_WORKING) return false; 4982 4983 // decline incoming connections 4984 if (hci_stack->decline_reason){ 4985 uint8_t reason = hci_stack->decline_reason; 4986 hci_stack->decline_reason = 0; 4987 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4988 return true; 4989 } 4990 4991 if (hci_stack->gap_tasks_classic != 0){ 4992 hci_run_gap_tasks_classic(); 4993 return true; 4994 } 4995 4996 // start/stop inquiry 4997 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4998 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 4999 if (hci_classic_operation_active() == false) 5000 #endif 5001 { 5002 uint8_t duration = hci_stack->inquiry_state; 5003 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5004 if (hci_stack->inquiry_max_period_length != 0){ 5005 hci_send_cmd(&hci_periodic_inquiry_mode, hci_stack->inquiry_max_period_length, hci_stack->inquiry_min_period_length, hci_stack->inquiry_lap, duration, 0); 5006 } else { 5007 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5008 } 5009 return true; 5010 } 5011 } 5012 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5013 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5014 hci_send_cmd(&hci_inquiry_cancel); 5015 return true; 5016 } 5017 5018 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5019 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5020 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5021 return true; 5022 } 5023 5024 // remote name request 5025 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5026 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5027 if (hci_classic_operation_active() == false) 5028 #endif 5029 { 5030 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5031 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5032 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5033 return true; 5034 } 5035 } 5036 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5037 // Local OOB data 5038 if (hci_stack->classic_read_local_oob_data){ 5039 hci_stack->classic_read_local_oob_data = false; 5040 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5041 hci_send_cmd(&hci_read_local_extended_oob_data); 5042 } else { 5043 hci_send_cmd(&hci_read_local_oob_data); 5044 } 5045 } 5046 #endif 5047 // pairing 5048 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5049 uint8_t state = hci_stack->gap_pairing_state; 5050 uint8_t pin_code[16]; 5051 switch (state){ 5052 case GAP_PAIRING_STATE_SEND_PIN: 5053 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5054 memset(pin_code, 0, 16); 5055 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5056 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5057 break; 5058 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5059 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5060 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5061 break; 5062 case GAP_PAIRING_STATE_SEND_PASSKEY: 5063 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5064 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5065 break; 5066 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5067 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5068 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5069 break; 5070 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5071 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5072 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5073 break; 5074 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5075 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5076 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5077 break; 5078 default: 5079 break; 5080 } 5081 return true; 5082 } 5083 return false; 5084 } 5085 #endif 5086 5087 #ifdef ENABLE_BLE 5088 5089 #ifdef ENABLE_LE_CENTRAL 5090 static void hci_le_scan_stop(void){ 5091 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5092 if (hci_extended_advertising_supported()) { 5093 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5094 } else 5095 #endif 5096 { 5097 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5098 } 5099 } 5100 #endif 5101 5102 #ifdef ENABLE_LE_PERIPHERAL 5103 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5104 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5105 uint8_t operation = 0; 5106 if (pos == 0){ 5107 // first fragment or complete data 5108 operation |= 1; 5109 } 5110 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5111 // last fragment or complete data 5112 operation |= 2; 5113 } 5114 return operation; 5115 } 5116 #endif 5117 #endif 5118 5119 static bool hci_run_general_gap_le(void){ 5120 5121 btstack_linked_list_iterator_t lit; 5122 5123 // Phase 1: collect what to stop 5124 5125 #ifdef ENABLE_LE_CENTRAL 5126 bool scanning_stop = false; 5127 bool connecting_stop = false; 5128 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5129 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5130 bool periodic_sync_stop = false; 5131 #endif 5132 #endif 5133 #endif 5134 5135 #ifdef ENABLE_LE_PERIPHERAL 5136 bool advertising_stop = false; 5137 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5138 le_advertising_set_t * advertising_stop_set = NULL; 5139 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5140 bool periodic_advertising_stop = false; 5141 #endif 5142 #endif 5143 #endif 5144 5145 // check if own address changes 5146 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5147 5148 // check if whitelist needs modification 5149 bool whitelist_modification_pending = false; 5150 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5151 while (btstack_linked_list_iterator_has_next(&lit)){ 5152 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5153 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5154 whitelist_modification_pending = true; 5155 break; 5156 } 5157 } 5158 5159 // check if resolving list needs modification 5160 bool resolving_list_modification_pending = false; 5161 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5162 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5163 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5164 resolving_list_modification_pending = true; 5165 } 5166 #endif 5167 5168 #ifdef ENABLE_LE_CENTRAL 5169 5170 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5171 // check if periodic advertiser list needs modification 5172 bool periodic_list_modification_pending = false; 5173 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5174 while (btstack_linked_list_iterator_has_next(&lit)){ 5175 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5176 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5177 periodic_list_modification_pending = true; 5178 break; 5179 } 5180 } 5181 #endif 5182 5183 // scanning control 5184 if (hci_stack->le_scanning_active) { 5185 // stop if: 5186 // - parameter change required 5187 // - it's disabled 5188 // - whitelist change required but used for scanning 5189 // - resolving list modified 5190 // - own address changes 5191 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5192 if ((hci_stack->le_scanning_param_update) || 5193 !hci_stack->le_scanning_enabled || 5194 (scanning_uses_whitelist && whitelist_modification_pending) || 5195 resolving_list_modification_pending || 5196 random_address_change){ 5197 5198 scanning_stop = true; 5199 } 5200 } 5201 5202 // connecting control 5203 bool connecting_with_whitelist; 5204 switch (hci_stack->le_connecting_state){ 5205 case LE_CONNECTING_DIRECT: 5206 case LE_CONNECTING_WHITELIST: 5207 // stop connecting if: 5208 // - connecting uses white and whitelist modification pending 5209 // - if it got disabled 5210 // - resolving list modified 5211 // - own address changes 5212 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5213 if ((connecting_with_whitelist && whitelist_modification_pending) || 5214 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5215 resolving_list_modification_pending || 5216 random_address_change) { 5217 5218 connecting_stop = true; 5219 } 5220 break; 5221 default: 5222 break; 5223 } 5224 5225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5226 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5227 // periodic sync control 5228 bool sync_with_advertiser_list; 5229 switch(hci_stack->le_periodic_sync_state){ 5230 case LE_CONNECTING_DIRECT: 5231 case LE_CONNECTING_WHITELIST: 5232 // stop sync if: 5233 // - sync with advertiser list and advertiser list modification pending 5234 // - if it got disabled 5235 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5236 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5237 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5238 periodic_sync_stop = true; 5239 } 5240 break; 5241 default: 5242 break; 5243 } 5244 #endif 5245 #endif 5246 5247 #endif /* ENABLE_LE_CENTRAL */ 5248 5249 #ifdef ENABLE_LE_PERIPHERAL 5250 // le advertisement control 5251 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5252 // stop if: 5253 // - parameter change required 5254 // - random address used in advertising and changes 5255 // - it's disabled 5256 // - whitelist change required but used for advertisement filter policy 5257 // - resolving list modified 5258 // - own address changes 5259 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5260 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5261 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5262 if (advertising_change || 5263 (advertising_uses_random_address && random_address_change) || 5264 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5265 (advertising_uses_whitelist && whitelist_modification_pending) || 5266 resolving_list_modification_pending || 5267 random_address_change) { 5268 5269 advertising_stop = true; 5270 } 5271 } 5272 5273 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5274 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5275 btstack_linked_list_iterator_t it; 5276 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5277 while (btstack_linked_list_iterator_has_next(&it)){ 5278 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5279 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5280 // stop if: 5281 // - parameter change required 5282 // - random address used in connectable advertising and changes 5283 // - it's disabled 5284 // - whitelist change required but used for advertisement filter policy 5285 // - resolving list modified 5286 // - own address changes 5287 // - advertisement set will be removed 5288 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5289 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5290 bool advertising_uses_random_address = 5291 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5292 advertising_connectable; 5293 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5294 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5295 bool advertising_set_random_address_change = 5296 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5297 bool advertising_set_will_be_removed = 5298 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5299 if (advertising_parameter_change || 5300 (advertising_uses_random_address && advertising_set_random_address_change) || 5301 (advertising_enabled == false) || 5302 (advertising_uses_whitelist && whitelist_modification_pending) || 5303 resolving_list_modification_pending || 5304 advertising_set_will_be_removed) { 5305 5306 advertising_stop = true; 5307 advertising_stop_set = advertising_set; 5308 break; 5309 } 5310 } 5311 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5312 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5313 // stop if: 5314 // - it's disabled 5315 // - parameter change required 5316 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5317 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5318 if ((periodic_enabled == false) || periodic_parameter_change){ 5319 periodic_advertising_stop = true; 5320 advertising_stop_set = advertising_set; 5321 } 5322 } 5323 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5324 } 5325 } 5326 #endif 5327 5328 #endif 5329 5330 5331 // Phase 2: stop everything that should be off during modifications 5332 5333 5334 // 2.1 Outgoing connection 5335 #ifdef ENABLE_LE_CENTRAL 5336 if (connecting_stop){ 5337 hci_send_cmd(&hci_le_create_connection_cancel); 5338 return true; 5339 } 5340 #endif 5341 5342 // 2.2 Scanning 5343 #ifdef ENABLE_LE_CENTRAL 5344 if (scanning_stop){ 5345 hci_stack->le_scanning_active = false; 5346 hci_le_scan_stop(); 5347 return true; 5348 } 5349 5350 // 2.3 Periodic Sync 5351 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5352 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5353 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5354 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5355 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5356 return true; 5357 } 5358 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5359 if (periodic_sync_stop){ 5360 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5361 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5362 return true; 5363 } 5364 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5365 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5366 #endif /* ENABLE_LE_CENTRAL */ 5367 5368 // 2.4 Advertising: legacy, extended, periodic 5369 #ifdef ENABLE_LE_PERIPHERAL 5370 if (advertising_stop){ 5371 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5372 if (hci_extended_advertising_supported()) { 5373 uint8_t advertising_stop_handle; 5374 if (advertising_stop_set != NULL){ 5375 advertising_stop_handle = advertising_stop_set->advertising_handle; 5376 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5377 } else { 5378 advertising_stop_handle = 0; 5379 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5380 } 5381 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5382 const uint16_t durations[] = { 0 }; 5383 const uint16_t max_events[] = { 0 }; 5384 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5385 } else 5386 #endif 5387 { 5388 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5389 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5390 } 5391 return true; 5392 } 5393 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5394 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5395 if (periodic_advertising_stop){ 5396 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5397 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5398 return true; 5399 } 5400 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5401 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5402 #endif /* ENABLE_LE_PERIPHERAL */ 5403 5404 5405 // Phase 3: modify 5406 5407 if (random_address_change){ 5408 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5409 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5410 if (hci_extended_advertising_supported()) { 5411 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5412 } 5413 #endif 5414 { 5415 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5416 } 5417 return true; 5418 } 5419 5420 #ifdef ENABLE_LE_CENTRAL 5421 if (hci_stack->le_scanning_param_update){ 5422 hci_stack->le_scanning_param_update = false; 5423 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5424 if (hci_extended_advertising_supported()){ 5425 // prepare arrays for all PHYs 5426 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5427 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5428 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5429 uint8_t scanning_phys = 1; // LE 1M PHY 5430 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5431 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5432 } else 5433 #endif 5434 { 5435 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5436 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5437 } 5438 return true; 5439 } 5440 #endif 5441 5442 #ifdef ENABLE_LE_PERIPHERAL 5443 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5444 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5445 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5446 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5447 if (hci_extended_advertising_supported()){ 5448 // map advertisment type to advertising event properties 5449 uint16_t adv_event_properties = 0; 5450 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5451 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5452 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5453 } 5454 hci_stack->le_advertising_set_in_current_command = 0; 5455 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5456 0, 5457 adv_event_properties, 5458 hci_stack->le_advertisements_interval_min, 5459 hci_stack->le_advertisements_interval_max, 5460 hci_stack->le_advertisements_channel_map, 5461 hci_stack->le_advertisements_own_addr_type, 5462 hci_stack->le_advertisements_direct_address_type, 5463 hci_stack->le_advertisements_direct_address, 5464 hci_stack->le_advertisements_filter_policy, 5465 0x7f, // tx power: no preference 5466 0x01, // primary adv phy: LE 1M 5467 0, // secondary adv max skip 5468 0, // secondary adv phy 5469 0, // adv sid 5470 0 // scan request notification 5471 ); 5472 } 5473 #endif 5474 { 5475 hci_send_cmd(&hci_le_set_advertising_parameters, 5476 hci_stack->le_advertisements_interval_min, 5477 hci_stack->le_advertisements_interval_max, 5478 hci_stack->le_advertisements_type, 5479 hci_stack->le_advertisements_own_addr_type, 5480 hci_stack->le_advertisements_direct_address_type, 5481 hci_stack->le_advertisements_direct_address, 5482 hci_stack->le_advertisements_channel_map, 5483 hci_stack->le_advertisements_filter_policy); 5484 } 5485 return true; 5486 } 5487 5488 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5489 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5490 uint8_t adv_data_clean[31]; 5491 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5492 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5493 hci_stack->le_advertisements_data_len); 5494 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5495 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5496 if (hci_extended_advertising_supported()){ 5497 hci_stack->le_advertising_set_in_current_command = 0; 5498 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5499 } else 5500 #endif 5501 { 5502 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5503 } 5504 return true; 5505 } 5506 5507 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5508 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5509 uint8_t scan_data_clean[31]; 5510 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5511 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5512 hci_stack->le_scan_response_data_len); 5513 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5514 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5515 if (hci_extended_advertising_supported()){ 5516 hci_stack->le_advertising_set_in_current_command = 0; 5517 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5518 } else 5519 #endif 5520 { 5521 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5522 } 5523 return true; 5524 } 5525 5526 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5527 if (hci_extended_advertising_supported()) { 5528 btstack_linked_list_iterator_t it; 5529 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5530 while (btstack_linked_list_iterator_has_next(&it)){ 5531 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5532 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5533 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5534 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5535 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5536 return true; 5537 } 5538 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5539 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5540 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5541 return true; 5542 } 5543 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5544 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5545 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5546 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5547 advertising_set->advertising_handle, 5548 advertising_set->extended_params.advertising_event_properties, 5549 advertising_set->extended_params.primary_advertising_interval_min, 5550 advertising_set->extended_params.primary_advertising_interval_max, 5551 advertising_set->extended_params.primary_advertising_channel_map, 5552 advertising_set->extended_params.own_address_type, 5553 advertising_set->extended_params.peer_address_type, 5554 advertising_set->extended_params.peer_address, 5555 advertising_set->extended_params.advertising_filter_policy, 5556 advertising_set->extended_params.advertising_tx_power, 5557 advertising_set->extended_params.primary_advertising_phy, 5558 advertising_set->extended_params.secondary_advertising_max_skip, 5559 advertising_set->extended_params.secondary_advertising_phy, 5560 advertising_set->extended_params.advertising_sid, 5561 advertising_set->extended_params.scan_request_notification_enable 5562 ); 5563 return true; 5564 } 5565 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5566 uint16_t pos = advertising_set->adv_data_pos; 5567 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5568 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5569 if ((operation & 0x02) != 0){ 5570 // last fragment or complete data 5571 operation |= 2; 5572 advertising_set->adv_data_pos = 0; 5573 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5574 } else { 5575 advertising_set->adv_data_pos += data_to_upload; 5576 } 5577 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5578 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5579 return true; 5580 } 5581 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5582 uint16_t pos = advertising_set->scan_data_pos; 5583 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5584 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5585 if ((operation & 0x02) != 0){ 5586 advertising_set->scan_data_pos = 0; 5587 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5588 } else { 5589 advertising_set->scan_data_pos += data_to_upload; 5590 } 5591 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5592 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5593 return true; 5594 } 5595 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5596 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5597 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5598 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5599 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5600 advertising_set->advertising_handle, 5601 advertising_set->periodic_params.periodic_advertising_interval_min, 5602 advertising_set->periodic_params.periodic_advertising_interval_max, 5603 advertising_set->periodic_params.periodic_advertising_properties); 5604 return true; 5605 } 5606 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5607 uint16_t pos = advertising_set->periodic_data_pos; 5608 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5609 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5610 if ((operation & 0x02) != 0){ 5611 // last fragment or complete data 5612 operation |= 2; 5613 advertising_set->periodic_data_pos = 0; 5614 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5615 } else { 5616 advertising_set->periodic_data_pos += data_to_upload; 5617 } 5618 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5619 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5620 return true; 5621 } 5622 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5623 } 5624 } 5625 #endif 5626 5627 #endif 5628 5629 #ifdef ENABLE_LE_CENTRAL 5630 // if connect with whitelist was active and is not cancelled yet, wait until next time 5631 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5632 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5633 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5634 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5635 #endif 5636 #endif 5637 5638 // LE Whitelist Management 5639 if (whitelist_modification_pending){ 5640 // add/remove entries 5641 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5642 while (btstack_linked_list_iterator_has_next(&lit)){ 5643 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5644 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5645 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5646 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5647 return true; 5648 } 5649 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5650 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5651 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5652 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5653 return true; 5654 } 5655 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5656 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5657 btstack_memory_whitelist_entry_free(entry); 5658 } 5659 } 5660 } 5661 5662 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5663 // LE Resolving List Management 5664 if (resolving_list_supported) { 5665 uint16_t i; 5666 switch (hci_stack->le_resolving_list_state) { 5667 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5668 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5669 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5670 return true; 5671 case LE_RESOLVING_LIST_READ_SIZE: 5672 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5673 hci_send_cmd(&hci_le_read_resolving_list_size); 5674 return true; 5675 case LE_RESOLVING_LIST_SEND_CLEAR: 5676 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5677 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5678 sizeof(hci_stack->le_resolving_list_add_entries)); 5679 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5680 sizeof(hci_stack->le_resolving_list_remove_entries)); 5681 hci_send_cmd(&hci_le_clear_resolving_list); 5682 return true; 5683 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5684 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5685 uint8_t offset = i >> 3; 5686 uint8_t mask = 1 << (i & 7); 5687 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5688 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5689 bd_addr_t peer_identity_addreses; 5690 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5691 sm_key_t peer_irk; 5692 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5693 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5694 5695 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5696 // trigger whitelist entry 'update' (work around for controller bug) 5697 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5698 while (btstack_linked_list_iterator_has_next(&lit)) { 5699 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5700 if (entry->address_type != peer_identity_addr_type) continue; 5701 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5702 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5703 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5704 } 5705 #endif 5706 5707 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5708 peer_identity_addreses); 5709 return true; 5710 } 5711 5712 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5713 5714 /* fall through */ 5715 5716 case LE_RESOLVING_LIST_ADD_ENTRIES: 5717 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5718 uint8_t offset = i >> 3; 5719 uint8_t mask = 1 << (i & 7); 5720 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5721 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5722 bd_addr_t peer_identity_addreses; 5723 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5724 sm_key_t peer_irk; 5725 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5726 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5727 const uint8_t *local_irk = gap_get_persistent_irk(); 5728 // command uses format specifier 'P' that stores 16-byte value without flip 5729 uint8_t local_irk_flipped[16]; 5730 uint8_t peer_irk_flipped[16]; 5731 reverse_128(local_irk, local_irk_flipped); 5732 reverse_128(peer_irk, peer_irk_flipped); 5733 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 5734 peer_irk_flipped, local_irk_flipped); 5735 return true; 5736 } 5737 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5738 break; 5739 5740 default: 5741 break; 5742 } 5743 } 5744 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 5745 #endif 5746 5747 #ifdef ENABLE_LE_CENTRAL 5748 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5749 // LE Whitelist Management 5750 if (periodic_list_modification_pending){ 5751 // add/remove entries 5752 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5753 while (btstack_linked_list_iterator_has_next(&lit)){ 5754 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5755 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 5756 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 5757 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 5758 return true; 5759 } 5760 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 5761 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 5762 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 5763 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 5764 return true; 5765 } 5766 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 5767 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 5768 btstack_memory_periodic_advertiser_list_entry_free(entry); 5769 } 5770 } 5771 } 5772 #endif 5773 #endif 5774 5775 // post-pone all actions until stack is fully working 5776 if (hci_stack->state != HCI_STATE_WORKING) return false; 5777 5778 // advertisements, active scanning, and creating connections requires random address to be set if using private address 5779 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 5780 5781 // Phase 4: restore state 5782 5783 #ifdef ENABLE_LE_CENTRAL 5784 // re-start scanning 5785 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 5786 hci_stack->le_scanning_active = true; 5787 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5788 if (hci_extended_advertising_supported()){ 5789 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 5790 } else 5791 #endif 5792 { 5793 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 5794 } 5795 return true; 5796 } 5797 #endif 5798 5799 #ifdef ENABLE_LE_CENTRAL 5800 // re-start connecting 5801 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 5802 bd_addr_t null_addr; 5803 memset(null_addr, 0, 6); 5804 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5805 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5806 hci_send_cmd(&hci_le_create_connection, 5807 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 5808 hci_stack->le_connection_scan_window, // scan interval: 30 ms 5809 1, // use whitelist 5810 0, // peer address type 5811 null_addr, // peer bd addr 5812 hci_stack->le_connection_own_addr_type, // our addr type: 5813 hci_stack->le_connection_interval_min, // conn interval min 5814 hci_stack->le_connection_interval_max, // conn interval max 5815 hci_stack->le_connection_latency, // conn latency 5816 hci_stack->le_supervision_timeout, // conn latency 5817 hci_stack->le_minimum_ce_length, // min ce length 5818 hci_stack->le_maximum_ce_length // max ce length 5819 ); 5820 return true; 5821 } 5822 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5823 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 5824 switch(hci_stack->le_periodic_sync_request){ 5825 case LE_CONNECTING_DIRECT: 5826 case LE_CONNECTING_WHITELIST: 5827 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 5828 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 5829 hci_stack->le_periodic_sync_options, 5830 hci_stack->le_periodic_sync_advertising_sid, 5831 hci_stack->le_periodic_sync_advertiser_address_type, 5832 hci_stack->le_periodic_sync_advertiser_address, 5833 hci_stack->le_periodic_sync_skip, 5834 hci_stack->le_periodic_sync_timeout, 5835 hci_stack->le_periodic_sync_cte_type); 5836 return true; 5837 default: 5838 break; 5839 } 5840 } 5841 #endif 5842 #endif 5843 5844 #ifdef ENABLE_LE_PERIPHERAL 5845 // re-start advertising 5846 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5847 // check if advertisements should be enabled given 5848 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5849 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 5850 5851 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5852 if (hci_extended_advertising_supported()){ 5853 const uint8_t advertising_handles[] = { 0 }; 5854 const uint16_t durations[] = { 0 }; 5855 const uint16_t max_events[] = { 0 }; 5856 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5857 } else 5858 #endif 5859 { 5860 hci_send_cmd(&hci_le_set_advertise_enable, 1); 5861 } 5862 return true; 5863 } 5864 5865 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5866 if (hci_extended_advertising_supported()) { 5867 btstack_linked_list_iterator_t it; 5868 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5869 while (btstack_linked_list_iterator_has_next(&it)) { 5870 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 5871 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 5872 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 5873 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 5874 const uint16_t durations[] = { advertising_set->enable_timeout }; 5875 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 5876 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 5877 return true; 5878 } 5879 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5880 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 5881 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5882 uint8_t enable = 1; 5883 if (advertising_set->periodic_include_adi){ 5884 enable |= 2; 5885 } 5886 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 5887 return true; 5888 } 5889 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5890 } 5891 } 5892 #endif 5893 #endif 5894 5895 return false; 5896 } 5897 5898 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5899 static bool hci_run_iso_tasks(void){ 5900 btstack_linked_list_iterator_t it; 5901 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 5902 while (btstack_linked_list_iterator_has_next(&it)){ 5903 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 5904 switch (big->state){ 5905 case LE_AUDIO_BIG_STATE_CREATE: 5906 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 5907 hci_send_cmd(&hci_le_create_big, 5908 big->params->big_handle, 5909 big->params->advertising_handle, 5910 big->params->num_bis, 5911 big->params->sdu_interval_us, 5912 big->params->max_sdu, 5913 big->params->max_transport_latency_ms, 5914 big->params->rtn, 5915 big->params->phy, 5916 big->params->packing, 5917 big->params->framing, 5918 big->params->encryption, 5919 big->params->broadcast_code); 5920 return true; 5921 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 5922 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 5923 hci_send_cmd(&hci_le_setup_iso_data_path, big->bis_con_handles[big->state_vars.next_bis], 0, 0, 0, 0, 0, 0, 0, NULL); 5924 return true; 5925 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 5926 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 5927 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5928 break; 5929 case LE_AUDIO_BIG_STATE_TERMINATE: 5930 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5931 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5932 return true; 5933 default: 5934 break; 5935 } 5936 } 5937 return false; 5938 } 5939 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 5940 #endif 5941 5942 static bool hci_run_general_pending_commands(void){ 5943 btstack_linked_item_t * it; 5944 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5945 hci_connection_t * connection = (hci_connection_t *) it; 5946 5947 switch(connection->state){ 5948 case SEND_CREATE_CONNECTION: 5949 switch(connection->address_type){ 5950 #ifdef ENABLE_CLASSIC 5951 case BD_ADDR_TYPE_ACL: 5952 log_info("sending hci_create_connection"); 5953 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 5954 break; 5955 #endif 5956 default: 5957 #ifdef ENABLE_BLE 5958 #ifdef ENABLE_LE_CENTRAL 5959 log_info("sending hci_le_create_connection"); 5960 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 5961 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 5962 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5963 if (hci_extended_advertising_supported()) { 5964 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 5965 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 5966 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 5967 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 5968 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 5969 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 5970 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 5971 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 5972 hci_send_cmd(&hci_le_extended_create_connection, 5973 0, // don't use whitelist 5974 hci_stack->le_connection_own_addr_type, // our addr type: 5975 connection->address_type, // peer address type 5976 connection->address, // peer bd addr 5977 1, // initiating PHY - 1M 5978 le_connection_scan_interval, // conn scan interval 5979 le_connection_scan_window, // conn scan windows 5980 le_connection_interval_min, // conn interval min 5981 le_connection_interval_max, // conn interval max 5982 le_connection_latency, // conn latency 5983 le_supervision_timeout, // conn latency 5984 le_minimum_ce_length, // min ce length 5985 le_maximum_ce_length // max ce length 5986 ); } 5987 else 5988 #endif 5989 { 5990 hci_send_cmd(&hci_le_create_connection, 5991 hci_stack->le_connection_scan_interval, // conn scan interval 5992 hci_stack->le_connection_scan_window, // conn scan windows 5993 0, // don't use whitelist 5994 connection->address_type, // peer address type 5995 connection->address, // peer bd addr 5996 hci_stack->le_connection_own_addr_type, // our addr type: 5997 hci_stack->le_connection_interval_min, // conn interval min 5998 hci_stack->le_connection_interval_max, // conn interval max 5999 hci_stack->le_connection_latency, // conn latency 6000 hci_stack->le_supervision_timeout, // conn latency 6001 hci_stack->le_minimum_ce_length, // min ce length 6002 hci_stack->le_maximum_ce_length // max ce length 6003 ); 6004 } 6005 connection->state = SENT_CREATE_CONNECTION; 6006 #endif 6007 #endif 6008 break; 6009 } 6010 return true; 6011 6012 #ifdef ENABLE_CLASSIC 6013 case RECEIVED_CONNECTION_REQUEST: 6014 connection->role = HCI_ROLE_SLAVE; 6015 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6016 log_info("sending hci_accept_connection_request"); 6017 connection->state = ACCEPTED_CONNECTION_REQUEST; 6018 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6019 return true; 6020 } 6021 break; 6022 #endif 6023 6024 #ifdef ENABLE_BLE 6025 #ifdef ENABLE_LE_CENTRAL 6026 case SEND_CANCEL_CONNECTION: 6027 connection->state = SENT_CANCEL_CONNECTION; 6028 hci_send_cmd(&hci_le_create_connection_cancel); 6029 return true; 6030 #endif 6031 #endif 6032 case SEND_DISCONNECT: 6033 connection->state = SENT_DISCONNECT; 6034 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6035 return true; 6036 6037 default: 6038 break; 6039 } 6040 6041 // no further commands if connection is about to get shut down 6042 if (connection->state == SENT_DISCONNECT) continue; 6043 6044 #ifdef ENABLE_CLASSIC 6045 6046 // Handling link key request requires remote supported features 6047 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6048 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6049 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6050 6051 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6052 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6053 if (have_link_key && security_level_sufficient){ 6054 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6055 } else { 6056 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6057 } 6058 return true; 6059 } 6060 6061 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6062 log_info("denying to pin request"); 6063 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6064 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6065 return true; 6066 } 6067 6068 // security assessment requires remote features 6069 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6070 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6071 hci_ssp_assess_security_on_io_cap_request(connection); 6072 // 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 6073 } 6074 6075 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6076 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6077 // set authentication requirements: 6078 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6079 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6080 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6081 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6082 authreq |= 1; 6083 } 6084 bool bonding = hci_stack->bondable; 6085 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6086 // if we have received IO Cap Response, we're in responder role 6087 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6088 if (bonding && !remote_bonding){ 6089 log_info("Remote not bonding, dropping local flag"); 6090 bonding = false; 6091 } 6092 } 6093 if (bonding){ 6094 if (connection->bonding_flags & BONDING_DEDICATED){ 6095 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6096 } else { 6097 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6098 } 6099 } 6100 uint8_t have_oob_data = 0; 6101 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6102 if (connection->classic_oob_c_192 != NULL){ 6103 have_oob_data |= 1; 6104 } 6105 if (connection->classic_oob_c_256 != NULL){ 6106 have_oob_data |= 2; 6107 } 6108 #endif 6109 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6110 return true; 6111 } 6112 6113 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6114 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6115 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6116 return true; 6117 } 6118 6119 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6120 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6121 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6122 const uint8_t zero[16] = { 0 }; 6123 const uint8_t * r_192 = zero; 6124 const uint8_t * c_192 = zero; 6125 const uint8_t * r_256 = zero; 6126 const uint8_t * c_256 = zero; 6127 // verify P-256 OOB 6128 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6129 c_256 = connection->classic_oob_c_256; 6130 if (connection->classic_oob_r_256 != NULL) { 6131 r_256 = connection->classic_oob_r_256; 6132 } 6133 } 6134 // verify P-192 OOB 6135 if ((connection->classic_oob_c_192 != NULL)) { 6136 c_192 = connection->classic_oob_c_192; 6137 if (connection->classic_oob_r_192 != NULL) { 6138 r_192 = connection->classic_oob_r_192; 6139 } 6140 } 6141 6142 // assess security 6143 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6144 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6145 if (need_level_4 && !can_reach_level_4){ 6146 log_info("Level 4 required, but not possible -> abort"); 6147 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6148 // send oob negative reply 6149 c_256 = NULL; 6150 c_192 = NULL; 6151 } 6152 6153 // Reply 6154 if (c_256 != zero) { 6155 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6156 } else if (c_192 != zero){ 6157 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6158 } else { 6159 hci_stack->classic_oob_con_handle = connection->con_handle; 6160 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6161 } 6162 return true; 6163 } 6164 #endif 6165 6166 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6167 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6168 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6169 return true; 6170 } 6171 6172 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6173 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6174 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6175 return true; 6176 } 6177 6178 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6179 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6180 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6181 return true; 6182 } 6183 6184 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6185 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6186 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6187 connection->state = SENT_DISCONNECT; 6188 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6189 return true; 6190 } 6191 6192 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6193 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6194 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6195 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6196 return true; 6197 } 6198 6199 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6200 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6201 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6202 return true; 6203 } 6204 6205 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6206 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6207 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6208 return true; 6209 } 6210 6211 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6212 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6213 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6214 return true; 6215 } 6216 6217 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6218 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6219 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6220 return true; 6221 } 6222 6223 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6224 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6225 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6226 return true; 6227 } 6228 #endif 6229 6230 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6231 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6232 #ifdef ENABLE_CLASSIC 6233 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6234 #endif 6235 if (connection->state != SENT_DISCONNECT){ 6236 connection->state = SENT_DISCONNECT; 6237 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6238 return true; 6239 } 6240 } 6241 6242 #ifdef ENABLE_CLASSIC 6243 uint16_t sniff_min_interval; 6244 switch (connection->sniff_min_interval){ 6245 case 0: 6246 break; 6247 case 0xffff: 6248 connection->sniff_min_interval = 0; 6249 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6250 return true; 6251 default: 6252 sniff_min_interval = connection->sniff_min_interval; 6253 connection->sniff_min_interval = 0; 6254 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6255 return true; 6256 } 6257 6258 if (connection->sniff_subrating_max_latency != 0xffff){ 6259 uint16_t max_latency = connection->sniff_subrating_max_latency; 6260 connection->sniff_subrating_max_latency = 0; 6261 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6262 return true; 6263 } 6264 6265 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6266 uint8_t service_type = (uint8_t) connection->qos_service_type; 6267 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6268 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); 6269 return true; 6270 } 6271 6272 if (connection->request_role != HCI_ROLE_INVALID){ 6273 hci_role_t role = connection->request_role; 6274 connection->request_role = HCI_ROLE_INVALID; 6275 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6276 return true; 6277 } 6278 #endif 6279 6280 if (connection->gap_connection_tasks != 0){ 6281 #ifdef ENABLE_CLASSIC 6282 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6283 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6284 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6285 return true; 6286 } 6287 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6288 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6289 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6290 return true; 6291 } 6292 #endif 6293 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6294 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6295 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6296 return true; 6297 } 6298 } 6299 6300 #ifdef ENABLE_BLE 6301 switch (connection->le_con_parameter_update_state){ 6302 // response to L2CAP CON PARAMETER UPDATE REQUEST 6303 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6304 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6305 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6306 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6307 0x0000, 0xffff); 6308 return true; 6309 case CON_PARAMETER_UPDATE_REPLY: 6310 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6311 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6312 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6313 0x0000, 0xffff); 6314 return true; 6315 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6316 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6317 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6318 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6319 return true; 6320 default: 6321 break; 6322 } 6323 if (connection->le_phy_update_all_phys != 0xffu){ 6324 uint8_t all_phys = connection->le_phy_update_all_phys; 6325 connection->le_phy_update_all_phys = 0xff; 6326 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); 6327 return true; 6328 } 6329 #endif 6330 } 6331 return false; 6332 } 6333 6334 static void hci_run(void){ 6335 6336 // stack state sub statemachines 6337 switch (hci_stack->state) { 6338 case HCI_STATE_INITIALIZING: 6339 hci_initializing_run(); 6340 break; 6341 case HCI_STATE_HALTING: 6342 hci_halting_run(); 6343 break; 6344 case HCI_STATE_FALLING_ASLEEP: 6345 hci_falling_asleep_run(); 6346 break; 6347 default: 6348 break; 6349 } 6350 6351 // allow to run after initialization to working transition 6352 if (hci_stack->state != HCI_STATE_WORKING){ 6353 return; 6354 } 6355 6356 bool done; 6357 6358 // send continuation fragments first, as they block the prepared packet buffer 6359 done = hci_run_acl_fragments(); 6360 if (done) return; 6361 6362 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6363 done = hci_run_iso_fragments(); 6364 if (done) return; 6365 #endif 6366 6367 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6368 // send host num completed packets next as they don't require num_cmd_packets > 0 6369 if (!hci_can_send_comand_packet_transport()) return; 6370 if (hci_stack->host_completed_packets){ 6371 hci_host_num_completed_packets(); 6372 return; 6373 } 6374 #endif 6375 6376 if (!hci_can_send_command_packet_now()) return; 6377 6378 // global/non-connection oriented commands 6379 6380 6381 #ifdef ENABLE_CLASSIC 6382 // general gap classic 6383 done = hci_run_general_gap_classic(); 6384 if (done) return; 6385 #endif 6386 6387 #ifdef ENABLE_BLE 6388 // general gap le 6389 done = hci_run_general_gap_le(); 6390 if (done) return; 6391 6392 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6393 // ISO related tasks, e.g. BIG create/terminate/sync 6394 done = hci_run_iso_tasks(); 6395 if (done) return; 6396 #endif 6397 #endif 6398 6399 // send pending HCI commands 6400 hci_run_general_pending_commands(); 6401 } 6402 6403 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6404 // house-keeping 6405 6406 #ifdef ENABLE_CLASSIC 6407 bd_addr_t addr; 6408 hci_connection_t * conn; 6409 #endif 6410 #ifdef ENABLE_LE_CENTRAL 6411 uint8_t initiator_filter_policy; 6412 #endif 6413 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6414 uint8_t i; 6415 uint8_t num_cis; 6416 hci_con_handle_t cis_handle; 6417 uint8_t status; 6418 #endif 6419 6420 uint16_t opcode = little_endian_read_16(packet, 0); 6421 switch (opcode) { 6422 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6423 hci_stack->loopback_mode = packet[3]; 6424 break; 6425 6426 #ifdef ENABLE_CLASSIC 6427 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6428 reverse_bd_addr(&packet[3], addr); 6429 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6430 6431 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6432 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6433 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6434 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6435 } 6436 6437 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6438 if (!conn) { 6439 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6440 if (!conn) { 6441 // notify client that alloc failed 6442 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6443 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6444 } 6445 conn->state = SEND_CREATE_CONNECTION; 6446 conn->role = HCI_ROLE_MASTER; 6447 } 6448 6449 log_info("conn state %u", conn->state); 6450 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6451 switch (conn->state) { 6452 // if connection active exists 6453 case OPEN: 6454 // and OPEN, emit connection complete command 6455 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6456 // packet not sent to controller 6457 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6458 case RECEIVED_DISCONNECTION_COMPLETE: 6459 // create connection triggered in disconnect complete event, let's do it now 6460 break; 6461 case SEND_CREATE_CONNECTION: 6462 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6463 if (hci_classic_operation_active()){ 6464 return ERROR_CODE_SUCCESS; 6465 } 6466 #endif 6467 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6468 break; 6469 default: 6470 // otherwise, just ignore as it is already in the open process 6471 // packet not sent to controller 6472 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6473 } 6474 conn->state = SENT_CREATE_CONNECTION; 6475 6476 // track outgoing connection 6477 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6478 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6479 break; 6480 6481 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6482 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6483 // setup_synchronous_connection? Voice setting at offset 22 6484 // TODO: compare to current setting if sco connection already active 6485 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6486 break; 6487 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6488 // accept_synchronous_connection? Voice setting at offset 18 6489 // TODO: compare to current setting if sco connection already active 6490 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6491 // track outgoing connection 6492 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6493 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6494 break; 6495 #endif 6496 #endif 6497 6498 #ifdef ENABLE_BLE 6499 #ifdef ENABLE_LE_CENTRAL 6500 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6501 // white list used? 6502 initiator_filter_policy = packet[7]; 6503 switch (initiator_filter_policy) { 6504 case 0: 6505 // whitelist not used 6506 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6507 break; 6508 case 1: 6509 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6510 break; 6511 default: 6512 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6513 break; 6514 } 6515 // track outgoing connection 6516 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6517 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6518 break; 6519 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6520 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6521 break; 6522 #endif 6523 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6524 #ifdef ENABLE_LE_CENTRAL 6525 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6526 status = ERROR_CODE_SUCCESS; 6527 num_cis = packet[3]; 6528 // setup hci_iso_streams 6529 for (i=0;i<num_cis;i++){ 6530 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6531 status = hci_iso_stream_create(cis_handle); 6532 if (status != ERROR_CODE_SUCCESS) { 6533 break; 6534 } 6535 } 6536 // free structs on error 6537 if (status != ERROR_CODE_SUCCESS){ 6538 hci_iso_stream_requested_finalize(); 6539 return status; 6540 } 6541 break; 6542 #endif /* ENABLE_LE_CENTRAL */ 6543 #ifdef ENABLE_LE_PERIPHERAL 6544 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6545 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6546 status = hci_iso_stream_create(cis_handle); 6547 if (status != ERROR_CODE_SUCCESS){ 6548 return status; 6549 } 6550 break; 6551 #endif /* ENABLE_LE_PERIPHERAL */ 6552 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6553 #endif /* ENABLE_BLE */ 6554 default: 6555 break; 6556 } 6557 6558 hci_stack->num_cmd_packets--; 6559 6560 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6561 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6562 if (err != 0){ 6563 return ERROR_CODE_HARDWARE_FAILURE; 6564 } 6565 return ERROR_CODE_SUCCESS; 6566 } 6567 6568 // disconnect because of security block 6569 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6570 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6571 if (!connection) return; 6572 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6573 } 6574 6575 6576 // Configure Secure Simple Pairing 6577 6578 #ifdef ENABLE_CLASSIC 6579 6580 // enable will enable SSP during init 6581 void gap_ssp_set_enable(int enable){ 6582 hci_stack->ssp_enable = enable; 6583 } 6584 6585 static int hci_local_ssp_activated(void){ 6586 return gap_ssp_supported() && hci_stack->ssp_enable; 6587 } 6588 6589 // if set, BTstack will respond to io capability request using authentication requirement 6590 void gap_ssp_set_io_capability(int io_capability){ 6591 hci_stack->ssp_io_capability = io_capability; 6592 } 6593 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6594 hci_stack->ssp_authentication_requirement = authentication_requirement; 6595 } 6596 6597 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6598 void gap_ssp_set_auto_accept(int auto_accept){ 6599 hci_stack->ssp_auto_accept = auto_accept; 6600 } 6601 6602 void gap_secure_connections_enable(bool enable){ 6603 hci_stack->secure_connections_enable = enable; 6604 } 6605 bool gap_secure_connections_active(void){ 6606 return hci_stack->secure_connections_active; 6607 } 6608 6609 #endif 6610 6611 // va_list part of hci_send_cmd 6612 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6613 if (!hci_can_send_command_packet_now()){ 6614 log_error("hci_send_cmd called but cannot send packet now"); 6615 return ERROR_CODE_COMMAND_DISALLOWED; 6616 } 6617 6618 // for HCI INITIALIZATION 6619 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6620 hci_stack->last_cmd_opcode = cmd->opcode; 6621 6622 hci_reserve_packet_buffer(); 6623 uint8_t * packet = hci_stack->hci_packet_buffer; 6624 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6625 uint8_t status = hci_send_cmd_packet(packet, size); 6626 6627 // release packet buffer on error or for synchronous transport implementations 6628 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6629 hci_release_packet_buffer(); 6630 hci_emit_transport_packet_sent(); 6631 } 6632 6633 return status; 6634 } 6635 6636 /** 6637 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6638 */ 6639 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6640 va_list argptr; 6641 va_start(argptr, cmd); 6642 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6643 va_end(argptr); 6644 return status; 6645 } 6646 6647 // Create various non-HCI events. 6648 // TODO: generalize, use table similar to hci_create_command 6649 6650 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6651 // dump packet 6652 if (dump) { 6653 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6654 } 6655 6656 // dispatch to all event handlers 6657 btstack_linked_list_iterator_t it; 6658 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6659 while (btstack_linked_list_iterator_has_next(&it)){ 6660 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6661 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6662 } 6663 } 6664 6665 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6666 if (!hci_stack->acl_packet_handler) return; 6667 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6668 } 6669 6670 #ifdef ENABLE_CLASSIC 6671 static void hci_notify_if_sco_can_send_now(void){ 6672 // notify SCO sender if waiting 6673 if (!hci_stack->sco_waiting_for_can_send_now) return; 6674 if (hci_can_send_sco_packet_now()){ 6675 hci_stack->sco_waiting_for_can_send_now = 0; 6676 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6677 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6678 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6679 } 6680 } 6681 6682 // parsing end emitting has been merged to reduce code size 6683 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6684 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6685 6686 uint8_t * eir_data; 6687 ad_context_t context; 6688 const uint8_t * name; 6689 uint8_t name_len; 6690 6691 if (size < 3) return; 6692 6693 int event_type = hci_event_packet_get_type(packet); 6694 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6695 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6696 6697 switch (event_type){ 6698 case HCI_EVENT_INQUIRY_RESULT: 6699 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6700 if (size != (3 + (num_responses * 14))) return; 6701 break; 6702 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6703 if (size != 257) return; 6704 if (num_responses != 1) return; 6705 break; 6706 default: 6707 return; 6708 } 6709 6710 // event[1] is set at the end 6711 int i; 6712 for (i=0; i<num_responses;i++){ 6713 memset(event, 0, sizeof(event)); 6714 event[0] = GAP_EVENT_INQUIRY_RESULT; 6715 uint8_t event_size = 27; // if name is not set by EIR 6716 6717 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 6718 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 6719 (void)memcpy(&event[9], 6720 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 6721 3); // class of device 6722 (void)memcpy(&event[12], 6723 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 6724 2); // clock offset 6725 6726 switch (event_type){ 6727 case HCI_EVENT_INQUIRY_RESULT: 6728 // 14,15,16,17 = 0, size 18 6729 break; 6730 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 6731 event[14] = 1; 6732 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6733 // 16,17 = 0, size 18 6734 break; 6735 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 6736 event[14] = 1; 6737 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 6738 // EIR packets only contain a single inquiry response 6739 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 6740 name = NULL; 6741 // Iterate over EIR data 6742 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 6743 uint8_t data_type = ad_iterator_get_data_type(&context); 6744 uint8_t data_size = ad_iterator_get_data_len(&context); 6745 const uint8_t * data = ad_iterator_get_data(&context); 6746 // Prefer Complete Local Name over Shortened Local Name 6747 switch (data_type){ 6748 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 6749 if (name) continue; 6750 /* fall through */ 6751 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 6752 name = data; 6753 name_len = data_size; 6754 break; 6755 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 6756 if (data_size != 8) break; 6757 event[16] = 1; 6758 memcpy(&event[17], data, 8); 6759 break; 6760 default: 6761 break; 6762 } 6763 } 6764 if (name){ 6765 event[25] = 1; 6766 // truncate name if needed 6767 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 6768 event[26] = len; 6769 (void)memcpy(&event[27], name, len); 6770 event_size += len; 6771 } 6772 break; 6773 default: 6774 return; 6775 } 6776 event[1] = event_size - 2; 6777 hci_emit_event(event, event_size, 1); 6778 } 6779 } 6780 #endif 6781 6782 void hci_emit_state(void){ 6783 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 6784 uint8_t event[3]; 6785 event[0] = BTSTACK_EVENT_STATE; 6786 event[1] = sizeof(event) - 2u; 6787 event[2] = hci_stack->state; 6788 hci_emit_event(event, sizeof(event), 1); 6789 } 6790 6791 #ifdef ENABLE_CLASSIC 6792 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 6793 uint8_t event[13]; 6794 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 6795 event[1] = sizeof(event) - 2; 6796 event[2] = status; 6797 little_endian_store_16(event, 3, con_handle); 6798 reverse_bd_addr(address, &event[5]); 6799 event[11] = 1; // ACL connection 6800 event[12] = 0; // encryption disabled 6801 hci_emit_event(event, sizeof(event), 1); 6802 } 6803 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 6804 if (disable_l2cap_timeouts) return; 6805 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 6806 uint8_t event[4]; 6807 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 6808 event[1] = sizeof(event) - 2; 6809 little_endian_store_16(event, 2, conn->con_handle); 6810 hci_emit_event(event, sizeof(event), 1); 6811 } 6812 #endif 6813 6814 #ifdef ENABLE_BLE 6815 #ifdef ENABLE_LE_CENTRAL 6816 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){ 6817 uint8_t event[21]; 6818 event[0] = HCI_EVENT_LE_META; 6819 event[1] = sizeof(event) - 2u; 6820 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 6821 event[3] = status; 6822 little_endian_store_16(event, 4, con_handle); 6823 event[6] = 0; // TODO: role 6824 event[7] = address_type; 6825 reverse_bd_addr(address, &event[8]); 6826 little_endian_store_16(event, 14, 0); // interval 6827 little_endian_store_16(event, 16, 0); // latency 6828 little_endian_store_16(event, 18, 0); // supervision timeout 6829 event[20] = 0; // master clock accuracy 6830 hci_emit_event(event, sizeof(event), 1); 6831 } 6832 #endif 6833 #endif 6834 6835 static void hci_emit_transport_packet_sent(void){ 6836 // notify upper stack that it might be possible to send again 6837 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 6838 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 6839 } 6840 6841 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 6842 uint8_t event[6]; 6843 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 6844 event[1] = sizeof(event) - 2u; 6845 event[2] = 0; // status = OK 6846 little_endian_store_16(event, 3, con_handle); 6847 event[5] = reason; 6848 hci_emit_event(event, sizeof(event), 1); 6849 } 6850 6851 static void hci_emit_nr_connections_changed(void){ 6852 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 6853 uint8_t event[3]; 6854 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 6855 event[1] = sizeof(event) - 2u; 6856 event[2] = nr_hci_connections(); 6857 hci_emit_event(event, sizeof(event), 1); 6858 } 6859 6860 static void hci_emit_hci_open_failed(void){ 6861 log_info("BTSTACK_EVENT_POWERON_FAILED"); 6862 uint8_t event[2]; 6863 event[0] = BTSTACK_EVENT_POWERON_FAILED; 6864 event[1] = sizeof(event) - 2u; 6865 hci_emit_event(event, sizeof(event), 1); 6866 } 6867 6868 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 6869 log_info("hci_emit_dedicated_bonding_result %u ", status); 6870 uint8_t event[9]; 6871 int pos = 0; 6872 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 6873 event[pos++] = sizeof(event) - 2u; 6874 event[pos++] = status; 6875 reverse_bd_addr(address, &event[pos]); 6876 hci_emit_event(event, sizeof(event), 1); 6877 } 6878 6879 6880 #ifdef ENABLE_CLASSIC 6881 6882 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 6883 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 6884 uint8_t event[5]; 6885 int pos = 0; 6886 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 6887 event[pos++] = sizeof(event) - 2; 6888 little_endian_store_16(event, 2, con_handle); 6889 pos += 2; 6890 event[pos++] = level; 6891 hci_emit_event(event, sizeof(event), 1); 6892 } 6893 6894 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 6895 if (!connection) return LEVEL_0; 6896 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 6897 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 6898 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 6899 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 6900 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 6901 // LEVEL 4 always requires 128 bit encrytion key size 6902 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 6903 security_level = LEVEL_3; 6904 } 6905 return security_level; 6906 } 6907 6908 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 6909 uint8_t event[4]; 6910 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 6911 event[1] = sizeof(event) - 2; 6912 event[2] = discoverable; 6913 event[3] = connectable; 6914 hci_emit_event(event, sizeof(event), 1); 6915 } 6916 6917 // query if remote side supports eSCO 6918 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 6919 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6920 if (!connection) return false; 6921 return (connection->remote_supported_features[0] & 1) != 0; 6922 } 6923 6924 static bool hci_ssp_supported(hci_connection_t * connection){ 6925 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 6926 return (connection->bonding_flags & mask) == mask; 6927 } 6928 6929 // query if remote side supports SSP 6930 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 6931 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6932 if (!connection) return false; 6933 return hci_ssp_supported(connection) ? 1 : 0; 6934 } 6935 6936 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 6937 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 6938 } 6939 6940 /** 6941 * Check if remote supported features query has completed 6942 */ 6943 bool hci_remote_features_available(hci_con_handle_t handle){ 6944 hci_connection_t * connection = hci_connection_for_handle(handle); 6945 if (!connection) return false; 6946 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 6947 } 6948 6949 /** 6950 * Trigger remote supported features query 6951 */ 6952 6953 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 6954 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 6955 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6956 } 6957 } 6958 6959 void hci_remote_features_query(hci_con_handle_t con_handle){ 6960 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6961 if (!connection) return; 6962 hci_trigger_remote_features_for_connection(connection); 6963 hci_run(); 6964 } 6965 6966 // GAP API 6967 /** 6968 * @bbrief enable/disable bonding. default is enabled 6969 * @praram enabled 6970 */ 6971 void gap_set_bondable_mode(int enable){ 6972 hci_stack->bondable = enable ? 1 : 0; 6973 } 6974 /** 6975 * @brief Get bondable mode. 6976 * @return 1 if bondable 6977 */ 6978 int gap_get_bondable_mode(void){ 6979 return hci_stack->bondable; 6980 } 6981 6982 /** 6983 * @brief map link keys to security levels 6984 */ 6985 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 6986 switch (link_key_type){ 6987 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 6988 return LEVEL_4; 6989 case COMBINATION_KEY: 6990 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 6991 return LEVEL_3; 6992 default: 6993 return LEVEL_2; 6994 } 6995 } 6996 6997 /** 6998 * @brief map link keys to secure connection yes/no 6999 */ 7000 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7001 switch (link_key_type){ 7002 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7003 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7004 return true; 7005 default: 7006 return false; 7007 } 7008 } 7009 7010 /** 7011 * @brief map link keys to authenticated 7012 */ 7013 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7014 switch (link_key_type){ 7015 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7016 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7017 return true; 7018 default: 7019 return false; 7020 } 7021 } 7022 7023 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7024 log_info("gap_mitm_protection_required_for_security_level %u", level); 7025 return level > LEVEL_2; 7026 } 7027 7028 /** 7029 * @brief get current security level 7030 */ 7031 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7032 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7033 if (!connection) return LEVEL_0; 7034 return gap_security_level_for_connection(connection); 7035 } 7036 7037 /** 7038 * @brief request connection to device to 7039 * @result GAP_AUTHENTICATION_RESULT 7040 */ 7041 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7042 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7043 if (!connection){ 7044 hci_emit_security_level(con_handle, LEVEL_0); 7045 return; 7046 } 7047 7048 btstack_assert(hci_is_le_connection(connection) == false); 7049 7050 // 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) 7051 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7052 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7053 requested_level = LEVEL_4; 7054 } 7055 7056 gap_security_level_t current_level = gap_security_level(con_handle); 7057 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7058 requested_level, connection->requested_security_level, current_level); 7059 7060 // authentication active if authentication request was sent or planned level > 0 7061 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7062 if (authentication_active){ 7063 // authentication already active 7064 if (connection->requested_security_level < requested_level){ 7065 // increase requested level as new level is higher 7066 // TODO: handle re-authentication when done 7067 connection->requested_security_level = requested_level; 7068 } 7069 } else { 7070 // no request active, notify if security sufficient 7071 if (requested_level <= current_level){ 7072 hci_emit_security_level(con_handle, current_level); 7073 return; 7074 } 7075 7076 // store request 7077 connection->requested_security_level = requested_level; 7078 7079 // start to authenticate connection 7080 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7081 7082 // request remote features if not already active, also trigger hci_run 7083 hci_remote_features_query(con_handle); 7084 } 7085 } 7086 7087 /** 7088 * @brief start dedicated bonding with device. disconnect after bonding 7089 * @param device 7090 * @param request MITM protection 7091 * @result GAP_DEDICATED_BONDING_COMPLETE 7092 */ 7093 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7094 7095 // create connection state machine 7096 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7097 7098 if (!connection){ 7099 return BTSTACK_MEMORY_ALLOC_FAILED; 7100 } 7101 7102 // delete linkn key 7103 gap_drop_link_key_for_bd_addr(device); 7104 7105 // configure LEVEL_2/3, dedicated bonding 7106 connection->state = SEND_CREATE_CONNECTION; 7107 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7108 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7109 connection->bonding_flags = BONDING_DEDICATED; 7110 7111 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7112 7113 // handle: connnection failure (connection complete != ok) 7114 // handle: authentication failure 7115 // handle: disconnect on done 7116 7117 hci_run(); 7118 7119 return 0; 7120 } 7121 7122 void gap_set_local_name(const char * local_name){ 7123 hci_stack->local_name = local_name; 7124 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7125 // also update EIR if not set by user 7126 if (hci_stack->eir_data == NULL){ 7127 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7128 } 7129 hci_run(); 7130 } 7131 #endif 7132 7133 7134 #ifdef ENABLE_BLE 7135 7136 #ifdef ENABLE_LE_CENTRAL 7137 void gap_start_scan(void){ 7138 hci_stack->le_scanning_enabled = true; 7139 hci_run(); 7140 } 7141 7142 void gap_stop_scan(void){ 7143 hci_stack->le_scanning_enabled = false; 7144 hci_run(); 7145 } 7146 7147 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7148 hci_stack->le_scan_type = scan_type; 7149 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7150 hci_stack->le_scan_interval = scan_interval; 7151 hci_stack->le_scan_window = scan_window; 7152 hci_stack->le_scanning_param_update = true; 7153 hci_run(); 7154 } 7155 7156 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7157 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7158 } 7159 7160 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7161 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7162 if (!conn){ 7163 // disallow if le connection is already outgoing 7164 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7165 log_error("le connection already active"); 7166 return ERROR_CODE_COMMAND_DISALLOWED; 7167 } 7168 7169 log_info("gap_connect: no connection exists yet, creating context"); 7170 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7171 if (!conn){ 7172 // notify client that alloc failed 7173 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7174 log_info("gap_connect: failed to alloc hci_connection_t"); 7175 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7176 } 7177 7178 // set le connecting state 7179 if (hci_is_le_connection_type(addr_type)){ 7180 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7181 } 7182 7183 conn->state = SEND_CREATE_CONNECTION; 7184 log_info("gap_connect: send create connection next"); 7185 hci_run(); 7186 return ERROR_CODE_SUCCESS; 7187 } 7188 7189 if (!hci_is_le_connection(conn) || 7190 (conn->state == SEND_CREATE_CONNECTION) || 7191 (conn->state == SENT_CREATE_CONNECTION)) { 7192 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7193 log_error("gap_connect: classic connection or connect is already being created"); 7194 return GATT_CLIENT_IN_WRONG_STATE; 7195 } 7196 7197 // check if connection was just disconnected 7198 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7199 log_info("gap_connect: send create connection (again)"); 7200 conn->state = SEND_CREATE_CONNECTION; 7201 hci_run(); 7202 return ERROR_CODE_SUCCESS; 7203 } 7204 7205 log_info("gap_connect: context exists with state %u", conn->state); 7206 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7207 hci_run(); 7208 return ERROR_CODE_SUCCESS; 7209 } 7210 7211 // @assumption: only a single outgoing LE Connection exists 7212 static hci_connection_t * gap_get_outgoing_connection(void){ 7213 btstack_linked_item_t *it; 7214 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7215 hci_connection_t * conn = (hci_connection_t *) it; 7216 if (!hci_is_le_connection(conn)) continue; 7217 switch (conn->state){ 7218 case SEND_CREATE_CONNECTION: 7219 case SENT_CREATE_CONNECTION: 7220 case SENT_CANCEL_CONNECTION: 7221 return conn; 7222 default: 7223 break; 7224 }; 7225 } 7226 return NULL; 7227 } 7228 7229 uint8_t gap_connect_cancel(void){ 7230 hci_connection_t * conn; 7231 switch (hci_stack->le_connecting_request){ 7232 case LE_CONNECTING_IDLE: 7233 break; 7234 case LE_CONNECTING_WHITELIST: 7235 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7236 hci_run(); 7237 break; 7238 case LE_CONNECTING_DIRECT: 7239 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7240 conn = gap_get_outgoing_connection(); 7241 if (conn == NULL){ 7242 hci_run(); 7243 } else { 7244 switch (conn->state){ 7245 case SEND_CREATE_CONNECTION: 7246 // skip sending create connection and emit event instead 7247 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7248 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7249 btstack_memory_hci_connection_free( conn ); 7250 break; 7251 case SENT_CREATE_CONNECTION: 7252 // request to send cancel connection 7253 conn->state = SEND_CANCEL_CONNECTION; 7254 hci_run(); 7255 break; 7256 default: 7257 break; 7258 } 7259 } 7260 break; 7261 default: 7262 btstack_unreachable(); 7263 break; 7264 } 7265 return ERROR_CODE_SUCCESS; 7266 } 7267 7268 /** 7269 * @brief Set connection parameters for outgoing connections 7270 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7271 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7272 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7273 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7274 * @param conn_latency, default: 4 7275 * @param supervision_timeout (unit: 10ms), default: 720 ms 7276 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7277 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7278 */ 7279 7280 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7281 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7282 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7283 hci_stack->le_connection_scan_interval = conn_scan_interval; 7284 hci_stack->le_connection_scan_window = conn_scan_window; 7285 hci_stack->le_connection_interval_min = conn_interval_min; 7286 hci_stack->le_connection_interval_max = conn_interval_max; 7287 hci_stack->le_connection_latency = conn_latency; 7288 hci_stack->le_supervision_timeout = supervision_timeout; 7289 hci_stack->le_minimum_ce_length = min_ce_length; 7290 hci_stack->le_maximum_ce_length = max_ce_length; 7291 } 7292 #endif 7293 7294 /** 7295 * @brief Updates the connection parameters for a given LE connection 7296 * @param handle 7297 * @param conn_interval_min (unit: 1.25ms) 7298 * @param conn_interval_max (unit: 1.25ms) 7299 * @param conn_latency 7300 * @param supervision_timeout (unit: 10ms) 7301 * @return 0 if ok 7302 */ 7303 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7304 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7305 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7306 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7307 connection->le_conn_interval_min = conn_interval_min; 7308 connection->le_conn_interval_max = conn_interval_max; 7309 connection->le_conn_latency = conn_latency; 7310 connection->le_supervision_timeout = supervision_timeout; 7311 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7312 hci_run(); 7313 return 0; 7314 } 7315 7316 /** 7317 * @brief Request an update of the connection parameter for a given LE connection 7318 * @param handle 7319 * @param conn_interval_min (unit: 1.25ms) 7320 * @param conn_interval_max (unit: 1.25ms) 7321 * @param conn_latency 7322 * @param supervision_timeout (unit: 10ms) 7323 * @return 0 if ok 7324 */ 7325 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7326 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7327 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7328 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7329 connection->le_conn_interval_min = conn_interval_min; 7330 connection->le_conn_interval_max = conn_interval_max; 7331 connection->le_conn_latency = conn_latency; 7332 connection->le_supervision_timeout = supervision_timeout; 7333 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7334 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7335 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7336 return 0; 7337 } 7338 7339 #ifdef ENABLE_LE_PERIPHERAL 7340 7341 /** 7342 * @brief Set Advertisement Data 7343 * @param advertising_data_length 7344 * @param advertising_data (max 31 octets) 7345 * @note data is not copied, pointer has to stay valid 7346 */ 7347 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7348 hci_stack->le_advertisements_data_len = advertising_data_length; 7349 hci_stack->le_advertisements_data = advertising_data; 7350 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7351 hci_run(); 7352 } 7353 7354 /** 7355 * @brief Set Scan Response Data 7356 * @param advertising_data_length 7357 * @param advertising_data (max 31 octets) 7358 * @note data is not copied, pointer has to stay valid 7359 */ 7360 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7361 hci_stack->le_scan_response_data_len = scan_response_data_length; 7362 hci_stack->le_scan_response_data = scan_response_data; 7363 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7364 hci_run(); 7365 } 7366 7367 /** 7368 * @brief Set Advertisement Parameters 7369 * @param adv_int_min 7370 * @param adv_int_max 7371 * @param adv_type 7372 * @param direct_address_type 7373 * @param direct_address 7374 * @param channel_map 7375 * @param filter_policy 7376 * 7377 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7378 */ 7379 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7380 uint8_t direct_address_typ, bd_addr_t direct_address, 7381 uint8_t channel_map, uint8_t filter_policy) { 7382 7383 hci_stack->le_advertisements_interval_min = adv_int_min; 7384 hci_stack->le_advertisements_interval_max = adv_int_max; 7385 hci_stack->le_advertisements_type = adv_type; 7386 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7387 hci_stack->le_advertisements_channel_map = channel_map; 7388 hci_stack->le_advertisements_filter_policy = filter_policy; 7389 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7390 6); 7391 7392 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7393 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7394 hci_run(); 7395 } 7396 7397 /** 7398 * @brief Enable/Disable Advertisements 7399 * @param enabled 7400 */ 7401 void gap_advertisements_enable(int enabled){ 7402 if (enabled == 0){ 7403 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7404 } else { 7405 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7406 } 7407 hci_update_advertisements_enabled_for_current_roles(); 7408 hci_run(); 7409 } 7410 7411 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7412 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7413 btstack_linked_list_iterator_t it; 7414 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7415 while (btstack_linked_list_iterator_has_next(&it)){ 7416 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7417 if ( item->advertising_handle == advertising_handle ) { 7418 return item; 7419 } 7420 } 7421 return NULL; 7422 } 7423 7424 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7425 // find free advertisement handle 7426 uint8_t advertisement_handle; 7427 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7428 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7429 } 7430 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7431 // clear 7432 memset(storage, 0, sizeof(le_advertising_set_t)); 7433 // copy params 7434 storage->advertising_handle = advertisement_handle; 7435 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7436 // add to list 7437 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7438 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7439 *out_advertising_handle = advertisement_handle; 7440 // set tasks and start 7441 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7442 hci_run(); 7443 return ERROR_CODE_SUCCESS; 7444 } 7445 7446 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7447 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7448 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7449 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7450 // set tasks and start 7451 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7452 hci_run(); 7453 return ERROR_CODE_SUCCESS; 7454 } 7455 7456 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7457 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7458 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7459 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7460 return ERROR_CODE_SUCCESS; 7461 } 7462 7463 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7464 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7465 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7466 memcpy(advertising_set->random_address, random_address, 6); 7467 // set tasks and start 7468 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7469 hci_run(); 7470 return ERROR_CODE_SUCCESS; 7471 } 7472 7473 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7474 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7475 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7476 advertising_set->adv_data = advertising_data; 7477 advertising_set->adv_data_len = advertising_data_length; 7478 // set tasks and start 7479 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7480 hci_run(); 7481 return ERROR_CODE_SUCCESS; 7482 } 7483 7484 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){ 7485 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7486 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7487 advertising_set->scan_data = scan_response_data; 7488 advertising_set->scan_data_len = scan_response_data_length; 7489 // set tasks and start 7490 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7491 hci_run(); 7492 return ERROR_CODE_SUCCESS; 7493 } 7494 7495 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7496 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7497 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7498 advertising_set->enable_timeout = timeout; 7499 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7500 // set tasks and start 7501 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7502 hci_run(); 7503 return ERROR_CODE_SUCCESS; 7504 } 7505 7506 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7507 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7508 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7509 // set tasks and start 7510 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7511 hci_run(); 7512 return ERROR_CODE_SUCCESS; 7513 } 7514 7515 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7516 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7517 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7518 // set tasks and start 7519 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7520 hci_run(); 7521 return ERROR_CODE_SUCCESS; 7522 } 7523 7524 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7525 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7526 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7527 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7528 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7529 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7530 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7531 // set tasks and start 7532 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7533 hci_run(); 7534 return ERROR_CODE_SUCCESS; 7535 } 7536 7537 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7538 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7539 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7540 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7541 return ERROR_CODE_SUCCESS; 7542 } 7543 7544 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7545 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7546 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7547 advertising_set->periodic_data = periodic_data; 7548 advertising_set->periodic_data_len = periodic_data_length; 7549 // set tasks and start 7550 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7551 hci_run(); 7552 return ERROR_CODE_SUCCESS; 7553 } 7554 7555 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7556 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7557 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7558 // set tasks and start 7559 advertising_set->periodic_include_adi = include_adi; 7560 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7561 hci_run(); 7562 return ERROR_CODE_SUCCESS; 7563 } 7564 7565 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7566 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7567 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7568 // set tasks and start 7569 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7570 hci_run(); 7571 return ERROR_CODE_SUCCESS; 7572 } 7573 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7574 7575 #endif 7576 7577 #endif 7578 7579 void hci_le_set_own_address_type(uint8_t own_address_type){ 7580 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7581 if (own_address_type == hci_stack->le_own_addr_type) return; 7582 hci_stack->le_own_addr_type = own_address_type; 7583 7584 #ifdef ENABLE_LE_PERIPHERAL 7585 // update advertisement parameters, too 7586 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7587 hci_run(); 7588 #endif 7589 #ifdef ENABLE_LE_CENTRAL 7590 // note: we don't update scan parameters or modify ongoing connection attempts 7591 #endif 7592 } 7593 7594 void hci_le_random_address_set(const bd_addr_t random_address){ 7595 memcpy(hci_stack->le_random_address, random_address, 6); 7596 hci_stack->le_random_address_set = true; 7597 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7598 hci_run(); 7599 } 7600 7601 #endif 7602 7603 uint8_t gap_disconnect(hci_con_handle_t handle){ 7604 hci_connection_t * conn = hci_connection_for_handle(handle); 7605 if (!conn){ 7606 hci_emit_disconnection_complete(handle, 0); 7607 return 0; 7608 } 7609 // ignore if already disconnected 7610 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7611 return 0; 7612 } 7613 conn->state = SEND_DISCONNECT; 7614 hci_run(); 7615 return 0; 7616 } 7617 7618 int gap_read_rssi(hci_con_handle_t con_handle){ 7619 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7620 if (hci_connection == NULL) return 0; 7621 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7622 hci_run(); 7623 return 1; 7624 } 7625 7626 /** 7627 * @brief Get connection type 7628 * @param con_handle 7629 * @result connection_type 7630 */ 7631 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7632 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7633 if (!conn) return GAP_CONNECTION_INVALID; 7634 switch (conn->address_type){ 7635 case BD_ADDR_TYPE_LE_PUBLIC: 7636 case BD_ADDR_TYPE_LE_RANDOM: 7637 return GAP_CONNECTION_LE; 7638 case BD_ADDR_TYPE_SCO: 7639 return GAP_CONNECTION_SCO; 7640 case BD_ADDR_TYPE_ACL: 7641 return GAP_CONNECTION_ACL; 7642 default: 7643 return GAP_CONNECTION_INVALID; 7644 } 7645 } 7646 7647 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7648 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7649 if (!conn) return HCI_ROLE_INVALID; 7650 return (hci_role_t) conn->role; 7651 } 7652 7653 7654 #ifdef ENABLE_CLASSIC 7655 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7656 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7657 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7658 conn->request_role = role; 7659 hci_run(); 7660 return ERROR_CODE_SUCCESS; 7661 } 7662 #endif 7663 7664 #ifdef ENABLE_BLE 7665 7666 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){ 7667 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7668 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7669 7670 conn->le_phy_update_all_phys = all_phys; 7671 conn->le_phy_update_tx_phys = tx_phys; 7672 conn->le_phy_update_rx_phys = rx_phys; 7673 conn->le_phy_update_phy_options = phy_options; 7674 7675 hci_run(); 7676 7677 return 0; 7678 } 7679 7680 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7681 // check if already in list 7682 btstack_linked_list_iterator_t it; 7683 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7684 while (btstack_linked_list_iterator_has_next(&it)) { 7685 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7686 if (entry->address_type != address_type) { 7687 continue; 7688 } 7689 if (memcmp(entry->address, address, 6) != 0) { 7690 continue; 7691 } 7692 // disallow if already scheduled to add 7693 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7694 return ERROR_CODE_COMMAND_DISALLOWED; 7695 } 7696 // still on controller, but scheduled to remove -> re-add 7697 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7698 return ERROR_CODE_SUCCESS; 7699 } 7700 // alloc and add to list 7701 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 7702 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 7703 entry->address_type = address_type; 7704 (void)memcpy(entry->address, address, 6); 7705 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 7706 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 7707 return ERROR_CODE_SUCCESS; 7708 } 7709 7710 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7711 btstack_linked_list_iterator_t it; 7712 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7713 while (btstack_linked_list_iterator_has_next(&it)){ 7714 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7715 if (entry->address_type != address_type) { 7716 continue; 7717 } 7718 if (memcmp(entry->address, address, 6) != 0) { 7719 continue; 7720 } 7721 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7722 // remove from controller if already present 7723 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7724 } else { 7725 // directly remove entry from whitelist 7726 btstack_linked_list_iterator_remove(&it); 7727 btstack_memory_whitelist_entry_free(entry); 7728 } 7729 return ERROR_CODE_SUCCESS; 7730 } 7731 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7732 } 7733 7734 static void hci_whitelist_clear(void){ 7735 btstack_linked_list_iterator_t it; 7736 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7737 while (btstack_linked_list_iterator_has_next(&it)){ 7738 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 7739 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 7740 // remove from controller if already present 7741 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 7742 continue; 7743 } 7744 // directly remove entry from whitelist 7745 btstack_linked_list_iterator_remove(&it); 7746 btstack_memory_whitelist_entry_free(entry); 7747 } 7748 } 7749 7750 // free all entries unconditionally 7751 static void hci_whitelist_free(void){ 7752 btstack_linked_list_iterator_t lit; 7753 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 7754 while (btstack_linked_list_iterator_has_next(&lit)){ 7755 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 7756 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 7757 btstack_memory_whitelist_entry_free(entry); 7758 } 7759 } 7760 7761 /** 7762 * @brief Clear Whitelist 7763 * @return 0 if ok 7764 */ 7765 uint8_t gap_whitelist_clear(void){ 7766 hci_whitelist_clear(); 7767 hci_run(); 7768 return ERROR_CODE_SUCCESS; 7769 } 7770 7771 /** 7772 * @brief Add Device to Whitelist 7773 * @param address_typ 7774 * @param address 7775 * @return 0 if ok 7776 */ 7777 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7778 uint8_t status = hci_whitelist_add(address_type, address); 7779 if (status){ 7780 return status; 7781 } 7782 hci_run(); 7783 return ERROR_CODE_SUCCESS; 7784 } 7785 7786 /** 7787 * @brief Remove Device from Whitelist 7788 * @param address_typ 7789 * @param address 7790 * @return 0 if ok 7791 */ 7792 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 7793 uint8_t status = hci_whitelist_remove(address_type, address); 7794 if (status){ 7795 return status; 7796 } 7797 hci_run(); 7798 return ERROR_CODE_SUCCESS; 7799 } 7800 7801 #ifdef ENABLE_LE_CENTRAL 7802 /** 7803 * @brief Connect with Whitelist 7804 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 7805 * @return - if ok 7806 */ 7807 uint8_t gap_connect_with_whitelist(void){ 7808 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7809 return ERROR_CODE_COMMAND_DISALLOWED; 7810 } 7811 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7812 hci_run(); 7813 return ERROR_CODE_SUCCESS; 7814 } 7815 7816 /** 7817 * @brief Auto Connection Establishment - Start Connecting to device 7818 * @param address_typ 7819 * @param address 7820 * @return 0 if ok 7821 */ 7822 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 7823 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7824 return ERROR_CODE_COMMAND_DISALLOWED; 7825 } 7826 7827 uint8_t status = hci_whitelist_add(address_type, address); 7828 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 7829 return status; 7830 } 7831 7832 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 7833 7834 hci_run(); 7835 return ERROR_CODE_SUCCESS; 7836 } 7837 7838 /** 7839 * @brief Auto Connection Establishment - Stop Connecting to device 7840 * @param address_typ 7841 * @param address 7842 * @return 0 if ok 7843 */ 7844 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 7845 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 7846 return ERROR_CODE_COMMAND_DISALLOWED; 7847 } 7848 7849 hci_whitelist_remove(address_type, address); 7850 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 7851 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7852 } 7853 hci_run(); 7854 return 0; 7855 } 7856 7857 /** 7858 * @brief Auto Connection Establishment - Stop everything 7859 * @note Convenience function to stop all active auto connection attempts 7860 */ 7861 uint8_t gap_auto_connection_stop_all(void){ 7862 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 7863 return ERROR_CODE_COMMAND_DISALLOWED; 7864 } 7865 hci_whitelist_clear(); 7866 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7867 hci_run(); 7868 return ERROR_CODE_SUCCESS; 7869 } 7870 7871 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 7872 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7873 if (!conn) return 0; 7874 return conn->le_connection_interval; 7875 } 7876 #endif 7877 #endif 7878 7879 #ifdef ENABLE_CLASSIC 7880 /** 7881 * @brief Set Extended Inquiry Response data 7882 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 7883 * @note has to be done before stack starts up 7884 */ 7885 void gap_set_extended_inquiry_response(const uint8_t * data){ 7886 hci_stack->eir_data = data; 7887 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7888 hci_run(); 7889 } 7890 7891 /** 7892 * @brief Start GAP Classic Inquiry 7893 * @param duration in 1.28s units 7894 * @return 0 if ok 7895 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 7896 */ 7897 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 7898 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7899 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7900 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 7901 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7902 } 7903 hci_stack->inquiry_state = duration_in_1280ms_units; 7904 hci_stack->inquiry_max_period_length = 0; 7905 hci_stack->inquiry_min_period_length = 0; 7906 hci_run(); 7907 return 0; 7908 } 7909 7910 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 7911 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 7912 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7913 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7914 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7915 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7916 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 7917 7918 hci_stack->inquiry_state = duration; 7919 hci_stack->inquiry_max_period_length = max_period_length; 7920 hci_stack->inquiry_min_period_length = min_period_length; 7921 hci_run(); 7922 return 0; 7923 } 7924 7925 /** 7926 * @brief Stop GAP Classic Inquiry 7927 * @return 0 if ok 7928 */ 7929 int gap_inquiry_stop(void){ 7930 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 7931 // emit inquiry complete event, before it even started 7932 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 7933 hci_emit_event(event, sizeof(event), 1); 7934 return 0; 7935 } 7936 switch (hci_stack->inquiry_state){ 7937 case GAP_INQUIRY_STATE_ACTIVE: 7938 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 7939 hci_run(); 7940 return ERROR_CODE_SUCCESS; 7941 case GAP_INQUIRY_STATE_PERIODIC: 7942 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 7943 hci_run(); 7944 return ERROR_CODE_SUCCESS; 7945 default: 7946 return ERROR_CODE_COMMAND_DISALLOWED; 7947 } 7948 } 7949 7950 void gap_inquiry_set_lap(uint32_t lap){ 7951 hci_stack->inquiry_lap = lap; 7952 } 7953 7954 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 7955 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 7956 hci_stack->inquiry_scan_window = inquiry_scan_window; 7957 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 7958 hci_run(); 7959 } 7960 7961 7962 /** 7963 * @brief Remote Name Request 7964 * @param addr 7965 * @param page_scan_repetition_mode 7966 * @param clock_offset only used when bit 15 is set 7967 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 7968 */ 7969 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 7970 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7971 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 7972 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 7973 hci_stack->remote_name_clock_offset = clock_offset; 7974 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 7975 hci_run(); 7976 return 0; 7977 } 7978 7979 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 7980 hci_stack->gap_pairing_state = state; 7981 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 7982 hci_run(); 7983 return 0; 7984 } 7985 7986 /** 7987 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 7988 * @param addr 7989 * @param pin_data 7990 * @param pin_len 7991 * @return 0 if ok 7992 */ 7993 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 7994 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 7995 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 7996 hci_stack->gap_pairing_pin_len = pin_len; 7997 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 7998 } 7999 8000 /** 8001 * @brief Legacy Pairing Pin Code Response 8002 * @param addr 8003 * @param pin 8004 * @return 0 if ok 8005 */ 8006 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8007 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8008 } 8009 8010 /** 8011 * @brief Abort Legacy Pairing 8012 * @param addr 8013 * @param pin 8014 * @return 0 if ok 8015 */ 8016 int gap_pin_code_negative(bd_addr_t addr){ 8017 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8018 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8019 } 8020 8021 /** 8022 * @brief SSP Passkey Response 8023 * @param addr 8024 * @param passkey 8025 * @return 0 if ok 8026 */ 8027 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8028 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8029 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8030 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8031 } 8032 8033 /** 8034 * @brief Abort SSP Passkey Entry/Pairing 8035 * @param addr 8036 * @param pin 8037 * @return 0 if ok 8038 */ 8039 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8040 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8041 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8042 } 8043 8044 /** 8045 * @brief Accept SSP Numeric Comparison 8046 * @param addr 8047 * @param passkey 8048 * @return 0 if ok 8049 */ 8050 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8051 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8052 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8053 } 8054 8055 /** 8056 * @brief Abort SSP Numeric Comparison/Pairing 8057 * @param addr 8058 * @param pin 8059 * @return 0 if ok 8060 */ 8061 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8062 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8063 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8064 } 8065 8066 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8067 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8068 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8069 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8070 connectionSetAuthenticationFlags(conn, flag); 8071 hci_run(); 8072 return ERROR_CODE_SUCCESS; 8073 } 8074 #endif 8075 8076 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8077 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8078 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8079 } 8080 8081 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8082 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8083 } 8084 #endif 8085 8086 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8087 /** 8088 * @brief Report Remote OOB Data 8089 * @param bd_addr 8090 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8091 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8092 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8093 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8094 */ 8095 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){ 8096 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8097 if (connection == NULL) { 8098 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8099 } 8100 connection->classic_oob_c_192 = c_192; 8101 connection->classic_oob_r_192 = r_192; 8102 8103 // ignore P-256 if not supported by us 8104 if (hci_stack->secure_connections_active){ 8105 connection->classic_oob_c_256 = c_256; 8106 connection->classic_oob_r_256 = r_256; 8107 } 8108 8109 return ERROR_CODE_SUCCESS; 8110 } 8111 /** 8112 * @brief Generate new OOB data 8113 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8114 */ 8115 void gap_ssp_generate_oob_data(void){ 8116 hci_stack->classic_read_local_oob_data = true; 8117 hci_run(); 8118 } 8119 8120 #endif 8121 8122 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8123 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8124 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8125 if (connection == NULL) { 8126 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8127 } 8128 8129 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8130 connection->link_key_type = type; 8131 8132 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8133 } 8134 8135 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8136 /** 8137 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8138 * @param inquiry_mode see bluetooth_defines.h 8139 */ 8140 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8141 hci_stack->inquiry_mode = inquiry_mode; 8142 } 8143 8144 /** 8145 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8146 */ 8147 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8148 hci_stack->sco_voice_setting = voice_setting; 8149 } 8150 8151 /** 8152 * @brief Get SCO Voice Setting 8153 * @return current voice setting 8154 */ 8155 uint16_t hci_get_sco_voice_setting(void){ 8156 return hci_stack->sco_voice_setting; 8157 } 8158 8159 static int hci_have_usb_transport(void){ 8160 if (!hci_stack->hci_transport) return 0; 8161 const char * transport_name = hci_stack->hci_transport->name; 8162 if (!transport_name) return 0; 8163 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8164 } 8165 8166 /** @brief Get SCO packet length for current SCO Voice setting 8167 * @note Using SCO packets of the exact length is required for USB transfer 8168 * @return Length of SCO packets in bytes (not audio frames) 8169 */ 8170 uint16_t hci_get_sco_packet_length(void){ 8171 uint16_t sco_packet_length = 0; 8172 8173 #ifdef ENABLE_SCO_OVER_HCI 8174 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8175 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8176 8177 if (hci_have_usb_transport()){ 8178 // see Core Spec for H2 USB Transfer. 8179 // 3 byte SCO header + 24 bytes per connection 8180 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8181 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8182 } else { 8183 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8184 sco_packet_length = 3 + 60 * multiplier; 8185 // assert that it still fits inside an SCO buffer 8186 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8187 sco_packet_length = 3 + 60; 8188 } 8189 } 8190 #endif 8191 8192 #ifdef HAVE_SCO_TRANSPORT 8193 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8194 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8195 sco_packet_length = 3 + 60 * multiplier; 8196 #endif 8197 return sco_packet_length; 8198 } 8199 8200 /** 8201 * @brief Sets the master/slave policy 8202 * @param policy (0: attempt to become master, 1: let connecting device decide) 8203 */ 8204 void hci_set_master_slave_policy(uint8_t policy){ 8205 hci_stack->master_slave_policy = policy; 8206 } 8207 8208 #endif 8209 8210 HCI_STATE hci_get_state(void){ 8211 return hci_stack->state; 8212 } 8213 8214 #ifdef ENABLE_CLASSIC 8215 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8216 hci_stack->gap_classic_accept_callback = accept_callback; 8217 } 8218 #endif 8219 8220 /** 8221 * @brief Set callback for Bluetooth Hardware Error 8222 */ 8223 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8224 hci_stack->hardware_error_callback = fn; 8225 } 8226 8227 void hci_disconnect_all(void){ 8228 btstack_linked_list_iterator_t it; 8229 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8230 while (btstack_linked_list_iterator_has_next(&it)){ 8231 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8232 if (con->state == SENT_DISCONNECT) continue; 8233 con->state = SEND_DISCONNECT; 8234 } 8235 hci_run(); 8236 } 8237 8238 uint16_t hci_get_manufacturer(void){ 8239 return hci_stack->manufacturer; 8240 } 8241 8242 #ifdef ENABLE_BLE 8243 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8244 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8245 if (!hci_con) return NULL; 8246 return &hci_con->sm_connection; 8247 } 8248 8249 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8250 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8251 #endif 8252 8253 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8254 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8255 if (hci_connection == NULL) return 0; 8256 if (hci_is_le_connection(hci_connection)){ 8257 #ifdef ENABLE_BLE 8258 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8259 if (sm_conn->sm_connection_encrypted) { 8260 return sm_conn->sm_actual_encryption_key_size; 8261 } 8262 #endif 8263 } else { 8264 #ifdef ENABLE_CLASSIC 8265 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8266 return hci_connection->encryption_key_size; 8267 } 8268 #endif 8269 } 8270 return 0; 8271 } 8272 8273 bool gap_authenticated(hci_con_handle_t con_handle){ 8274 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8275 if (hci_connection == NULL) return false; 8276 8277 switch (hci_connection->address_type){ 8278 #ifdef ENABLE_BLE 8279 case BD_ADDR_TYPE_LE_PUBLIC: 8280 case BD_ADDR_TYPE_LE_RANDOM: 8281 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8282 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8283 #endif 8284 #ifdef ENABLE_CLASSIC 8285 case BD_ADDR_TYPE_SCO: 8286 case BD_ADDR_TYPE_ACL: 8287 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8288 #endif 8289 default: 8290 return false; 8291 } 8292 } 8293 8294 bool gap_secure_connection(hci_con_handle_t con_handle){ 8295 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8296 if (hci_connection == NULL) return 0; 8297 8298 switch (hci_connection->address_type){ 8299 #ifdef ENABLE_BLE 8300 case BD_ADDR_TYPE_LE_PUBLIC: 8301 case BD_ADDR_TYPE_LE_RANDOM: 8302 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8303 return hci_connection->sm_connection.sm_connection_sc != 0; 8304 #endif 8305 #ifdef ENABLE_CLASSIC 8306 case BD_ADDR_TYPE_SCO: 8307 case BD_ADDR_TYPE_ACL: 8308 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8309 #endif 8310 default: 8311 return false; 8312 } 8313 } 8314 8315 bool gap_bonded(hci_con_handle_t con_handle){ 8316 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8317 if (hci_connection == NULL) return 0; 8318 8319 #ifdef ENABLE_CLASSIC 8320 link_key_t link_key; 8321 link_key_type_t link_key_type; 8322 #endif 8323 switch (hci_connection->address_type){ 8324 #ifdef ENABLE_BLE 8325 case BD_ADDR_TYPE_LE_PUBLIC: 8326 case BD_ADDR_TYPE_LE_RANDOM: 8327 return hci_connection->sm_connection.sm_le_db_index >= 0; 8328 #endif 8329 #ifdef ENABLE_CLASSIC 8330 case BD_ADDR_TYPE_SCO: 8331 case BD_ADDR_TYPE_ACL: 8332 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8333 #endif 8334 default: 8335 return false; 8336 } 8337 } 8338 8339 #ifdef ENABLE_BLE 8340 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8341 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8342 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8343 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8344 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8345 return sm_conn->sm_connection_authorization_state; 8346 } 8347 #endif 8348 8349 #ifdef ENABLE_CLASSIC 8350 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){ 8351 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8352 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8353 conn->sniff_min_interval = sniff_min_interval; 8354 conn->sniff_max_interval = sniff_max_interval; 8355 conn->sniff_attempt = sniff_attempt; 8356 conn->sniff_timeout = sniff_timeout; 8357 hci_run(); 8358 return 0; 8359 } 8360 8361 /** 8362 * @brief Exit Sniff mode 8363 * @param con_handle 8364 @ @return 0 if ok 8365 */ 8366 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8367 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8368 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8369 conn->sniff_min_interval = 0xffff; 8370 hci_run(); 8371 return 0; 8372 } 8373 8374 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){ 8375 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8376 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8377 conn->sniff_subrating_max_latency = max_latency; 8378 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8379 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8380 hci_run(); 8381 return ERROR_CODE_SUCCESS; 8382 } 8383 8384 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){ 8385 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8386 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8387 conn->qos_service_type = service_type; 8388 conn->qos_token_rate = token_rate; 8389 conn->qos_peak_bandwidth = peak_bandwidth; 8390 conn->qos_latency = latency; 8391 conn->qos_delay_variation = delay_variation; 8392 hci_run(); 8393 return ERROR_CODE_SUCCESS; 8394 } 8395 8396 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8397 hci_stack->new_page_scan_interval = page_scan_interval; 8398 hci_stack->new_page_scan_window = page_scan_window; 8399 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8400 hci_run(); 8401 } 8402 8403 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8404 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8405 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8406 hci_run(); 8407 } 8408 8409 void gap_set_page_timeout(uint16_t page_timeout){ 8410 hci_stack->page_timeout = page_timeout; 8411 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8412 hci_run(); 8413 } 8414 8415 #endif 8416 8417 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8418 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8419 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8420 if (le_device_db_index >= le_device_db_max_count()) return; 8421 uint8_t offset = le_device_db_index >> 3; 8422 uint8_t mask = 1 << (le_device_db_index & 7); 8423 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8424 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8425 // note: go back to remove entries, otherwise, a remove + add will skip the add 8426 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8427 } 8428 } 8429 8430 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8431 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8432 if (le_device_db_index >= le_device_db_max_count()) return; 8433 uint8_t offset = le_device_db_index >> 3; 8434 uint8_t mask = 1 << (le_device_db_index & 7); 8435 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8436 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8437 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8438 } 8439 } 8440 8441 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8442 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8443 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8444 } 8445 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8446 // restart le resolving list update 8447 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8448 } 8449 return ERROR_CODE_SUCCESS; 8450 } 8451 #endif 8452 8453 #ifdef ENABLE_BLE 8454 #ifdef ENABLE_LE_CENTRAL 8455 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8456 8457 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8458 // check if already in list 8459 btstack_linked_list_iterator_t it; 8460 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8461 while (btstack_linked_list_iterator_has_next(&it)) { 8462 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8463 if (entry->sid != advertising_sid) { 8464 continue; 8465 } 8466 if (entry->address_type != address_type) { 8467 continue; 8468 } 8469 if (memcmp(entry->address, address, 6) != 0) { 8470 continue; 8471 } 8472 // disallow if already scheduled to add 8473 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8474 return ERROR_CODE_COMMAND_DISALLOWED; 8475 } 8476 // still on controller, but scheduled to remove -> re-add 8477 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8478 return ERROR_CODE_SUCCESS; 8479 } 8480 // alloc and add to list 8481 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8482 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8483 entry->sid = advertising_sid; 8484 entry->address_type = address_type; 8485 (void)memcpy(entry->address, address, 6); 8486 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8487 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8488 return ERROR_CODE_SUCCESS; 8489 } 8490 8491 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8492 btstack_linked_list_iterator_t it; 8493 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8494 while (btstack_linked_list_iterator_has_next(&it)){ 8495 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8496 if (entry->sid != advertising_sid) { 8497 continue; 8498 } 8499 if (entry->address_type != address_type) { 8500 continue; 8501 } 8502 if (memcmp(entry->address, address, 6) != 0) { 8503 continue; 8504 } 8505 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8506 // remove from controller if already present 8507 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8508 } else { 8509 // directly remove entry from whitelist 8510 btstack_linked_list_iterator_remove(&it); 8511 btstack_memory_periodic_advertiser_list_entry_free(entry); 8512 } 8513 return ERROR_CODE_SUCCESS; 8514 } 8515 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8516 } 8517 8518 static void hci_periodic_advertiser_list_clear(void){ 8519 btstack_linked_list_iterator_t it; 8520 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8521 while (btstack_linked_list_iterator_has_next(&it)){ 8522 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8523 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8524 // remove from controller if already present 8525 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8526 continue; 8527 } 8528 // directly remove entry from whitelist 8529 btstack_linked_list_iterator_remove(&it); 8530 btstack_memory_periodic_advertiser_list_entry_free(entry); 8531 } 8532 } 8533 8534 // free all entries unconditionally 8535 static void hci_periodic_advertiser_list_free(void){ 8536 btstack_linked_list_iterator_t lit; 8537 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8538 while (btstack_linked_list_iterator_has_next(&lit)){ 8539 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8540 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8541 btstack_memory_periodic_advertiser_list_entry_free(entry); 8542 } 8543 } 8544 8545 uint8_t gap_periodic_advertiser_list_clear(void){ 8546 hci_periodic_advertiser_list_clear(); 8547 hci_run(); 8548 return ERROR_CODE_SUCCESS; 8549 } 8550 8551 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8552 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8553 if (status){ 8554 return status; 8555 } 8556 hci_run(); 8557 return ERROR_CODE_SUCCESS; 8558 } 8559 8560 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8561 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8562 if (status){ 8563 return status; 8564 } 8565 hci_run(); 8566 return ERROR_CODE_SUCCESS; 8567 } 8568 8569 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8570 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8571 // abort if already active 8572 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8573 return ERROR_CODE_COMMAND_DISALLOWED; 8574 } 8575 // store request 8576 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8577 hci_stack->le_periodic_sync_options = options; 8578 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8579 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8580 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8581 hci_stack->le_periodic_sync_skip = skip; 8582 hci_stack->le_periodic_sync_timeout = sync_timeout; 8583 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8584 8585 hci_run(); 8586 return ERROR_CODE_SUCCESS; 8587 } 8588 8589 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8590 // abort if not requested 8591 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8592 return ERROR_CODE_COMMAND_DISALLOWED; 8593 } 8594 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8595 hci_run(); 8596 return ERROR_CODE_SUCCESS; 8597 } 8598 8599 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8600 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8601 return ERROR_CODE_COMMAND_DISALLOWED; 8602 } 8603 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8604 hci_run(); 8605 return ERROR_CODE_SUCCESS; 8606 } 8607 8608 #endif 8609 #endif 8610 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8611 static uint8_t hci_iso_stream_create(hci_con_handle_t cis_handle){ 8612 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8613 if (iso_stream == NULL){ 8614 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8615 } else { 8616 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8617 iso_stream->con_handle = cis_handle; 8618 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8619 return ERROR_CODE_SUCCESS; 8620 } 8621 } 8622 8623 static hci_iso_stream_t * hci_iso_stream_for_cis_handle(hci_con_handle_t cis_handle){ 8624 btstack_linked_list_iterator_t it; 8625 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8626 while (btstack_linked_list_iterator_has_next(&it)){ 8627 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8628 if ( iso_stream->con_handle == cis_handle ) { 8629 return iso_stream; 8630 } 8631 } 8632 return NULL; 8633 } 8634 8635 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8636 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8637 btstack_memory_hci_iso_stream_free(iso_stream); 8638 } 8639 8640 static void hci_iso_stream_requested_finalize(void){ 8641 btstack_linked_list_iterator_t it; 8642 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8643 while (btstack_linked_list_iterator_has_next(&it)){ 8644 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8645 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8646 btstack_linked_list_iterator_remove(&it); 8647 btstack_memory_hci_iso_stream_free(iso_stream); 8648 } 8649 } 8650 } 8651 static void hci_iso_stream_requested_confirm(void){ 8652 btstack_linked_list_iterator_t it; 8653 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8654 while (btstack_linked_list_iterator_has_next(&it)){ 8655 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8656 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8657 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8658 } 8659 } 8660 } 8661 8662 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8663 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8664 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8665 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8666 return (sdu_len_offset + 2 + sdu_len) == size; 8667 } 8668 8669 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8670 if (hci_stack->iso_packet_handler == NULL) { 8671 return; 8672 } 8673 if (size < 4) { 8674 return; 8675 } 8676 8677 // parse header 8678 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8679 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8680 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8681 hci_iso_stream_t * iso_stream = hci_iso_stream_for_cis_handle(cis_handle); 8682 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8683 8684 // assert packet is complete 8685 if ((iso_data_len + 4u) != size){ 8686 return; 8687 } 8688 8689 if ((pb_flag & 0x01) == 0){ 8690 if (pb_flag == 0x02){ 8691 // The ISO_Data_Load field contains a header and a complete SDU. 8692 if (hci_iso_sdu_complete(packet, size)) { 8693 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 8694 } 8695 } else { 8696 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 8697 if (iso_stream == NULL){ 8698 return; 8699 } 8700 if (size > HCI_ISO_PAYLOAD_SIZE){ 8701 return; 8702 } 8703 memcpy(iso_stream->reassembly_buffer, packet, size); 8704 // fix pb_flag 8705 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 8706 iso_stream->reassembly_pos = size; 8707 } 8708 } else { 8709 // iso_data_load contains continuation or last fragment of an SDU 8710 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 8711 if (ts_flag != 0){ 8712 return; 8713 } 8714 // append fragment 8715 if (iso_stream == NULL){ 8716 return; 8717 } 8718 if (iso_stream->reassembly_pos == 0){ 8719 return; 8720 } 8721 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 8722 // reset reassembly buffer 8723 iso_stream->reassembly_pos = 0; 8724 return; 8725 } 8726 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 8727 iso_stream->reassembly_pos += iso_data_len; 8728 8729 // deliver if last fragment and SDU complete 8730 if (pb_flag == 0x03){ 8731 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 8732 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 8733 } 8734 iso_stream->reassembly_pos = 0; 8735 } 8736 } 8737 } 8738 8739 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 8740 uint8_t event [6 + (MAX_NR_BIS * 2)]; 8741 uint16_t pos = 0; 8742 event[pos++] = HCI_EVENT_META_GAP; 8743 event[pos++] = 4 + (2 * big->num_bis); 8744 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 8745 event[pos++] = status; 8746 event[pos++] = big->big_handle; 8747 event[pos++] = big->num_bis; 8748 uint8_t i; 8749 for (i=0;i<big->num_bis;i++){ 8750 little_endian_store_16(event, pos, big->bis_con_handles[i]); 8751 pos += 2; 8752 } 8753 hci_emit_event(event, pos, 0); 8754 } 8755 8756 static void hci_emit_big_terminated(const le_audio_big_t * big){ 8757 uint8_t event [4]; 8758 uint16_t pos = 0; 8759 event[pos++] = HCI_EVENT_META_GAP; 8760 event[pos++] = 2; 8761 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 8762 event[pos++] = big->big_handle; 8763 hci_emit_event(event, pos, 0); 8764 } 8765 8766 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 8767 btstack_linked_list_iterator_t it; 8768 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 8769 while (btstack_linked_list_iterator_has_next(&it)){ 8770 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 8771 if ( big->big_handle == big_handle ) { 8772 return big; 8773 } 8774 } 8775 return NULL; 8776 } 8777 8778 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 8779 if (hci_big_for_handle(big_params->big_handle) != NULL){ 8780 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 8781 } 8782 8783 if (big_params->num_bis == 0){ 8784 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8785 } 8786 if (big_params->num_bis > MAX_NR_BIS){ 8787 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8788 } 8789 8790 le_audio_big_t * big = storage; 8791 big->big_handle = big_params->big_handle; 8792 big->params = big_params; 8793 big->state = LE_AUDIO_BIG_STATE_CREATE; 8794 big->num_bis = big_params->num_bis; 8795 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 8796 8797 hci_run(); 8798 8799 return ERROR_CODE_SUCCESS; 8800 } 8801 8802 uint8_t gap_big_terminate(uint8_t big_handle){ 8803 le_audio_big_t * big = hci_big_for_handle(big_handle); 8804 if (big == NULL){ 8805 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8806 } 8807 switch (big->state){ 8808 case LE_AUDIO_BIG_STATE_CREATE: 8809 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 8810 break; 8811 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 8812 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED_THEN_TERMINATE; 8813 break; 8814 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 8815 case LE_AUDIO_BIG_STATE_ACTIVE: 8816 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 8817 hci_run(); 8818 break; 8819 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 8820 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 8821 break; 8822 default: 8823 return ERROR_CODE_COMMAND_DISALLOWED; 8824 } 8825 return ERROR_CODE_SUCCESS; 8826 } 8827 8828 #endif 8829 #endif /* ENABLE_BLE */ 8830 8831 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 8832 void hci_setup_test_connections_fuzz(void){ 8833 hci_connection_t * conn; 8834 8835 // default address: 66:55:44:33:00:01 8836 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 8837 8838 // setup Controller info 8839 hci_stack->num_cmd_packets = 255; 8840 hci_stack->acl_packets_total_num = 255; 8841 8842 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 8843 addr[5] = 0x01; 8844 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8845 conn->con_handle = addr[5]; 8846 conn->role = HCI_ROLE_SLAVE; 8847 conn->state = RECEIVED_CONNECTION_REQUEST; 8848 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8849 8850 // setup incoming Classic SCO connection with con handle 0x0002 8851 addr[5] = 0x02; 8852 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8853 conn->con_handle = addr[5]; 8854 conn->role = HCI_ROLE_SLAVE; 8855 conn->state = RECEIVED_CONNECTION_REQUEST; 8856 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8857 8858 // setup ready Classic ACL connection with con handle 0x0003 8859 addr[5] = 0x03; 8860 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8861 conn->con_handle = addr[5]; 8862 conn->role = HCI_ROLE_SLAVE; 8863 conn->state = OPEN; 8864 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8865 8866 // setup ready Classic SCO connection with con handle 0x0004 8867 addr[5] = 0x04; 8868 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 8869 conn->con_handle = addr[5]; 8870 conn->role = HCI_ROLE_SLAVE; 8871 conn->state = OPEN; 8872 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8873 8874 // setup ready LE ACL connection with con handle 0x005 and public address 8875 addr[5] = 0x05; 8876 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 8877 conn->con_handle = addr[5]; 8878 conn->role = HCI_ROLE_SLAVE; 8879 conn->state = OPEN; 8880 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 8881 conn->sm_connection.sm_connection_encrypted = 1; 8882 } 8883 8884 void hci_free_connections_fuzz(void){ 8885 btstack_linked_list_iterator_t it; 8886 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8887 while (btstack_linked_list_iterator_has_next(&it)){ 8888 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8889 btstack_linked_list_iterator_remove(&it); 8890 btstack_memory_hci_connection_free(con); 8891 } 8892 } 8893 void hci_simulate_working_fuzz(void){ 8894 hci_stack->le_scanning_param_update = false; 8895 hci_init_done(); 8896 hci_stack->num_cmd_packets = 255; 8897 } 8898 #endif 8899