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_CONTROLLER_DUMP_PACKETS 78 #include <stdio.h> // sprintf 79 #endif 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #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." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 119 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 120 #define GAP_INQUIRY_STATE_IDLE 0x00 121 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 122 #define GAP_INQUIRY_STATE_ACTIVE 0x81 123 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 124 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 125 #define GAP_INQUIRY_STATE_PERIODIC 0x84 126 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 127 128 // GAP Remote Name Request 129 #define GAP_REMOTE_NAME_STATE_IDLE 0 130 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 131 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 132 133 // GAP Pairing 134 #define GAP_PAIRING_STATE_IDLE 0 135 #define GAP_PAIRING_STATE_SEND_PIN 1 136 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 137 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 138 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 139 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 140 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 141 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 142 143 // 144 // compact storage of relevant supported HCI Commands. 145 // X-Macro below provides enumeration and mapping table into the supported 146 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 147 // 148 149 // format: command name, byte offset, bit nr in 64-byte supported commands 150 // currently stored in 32-bit variable 151 #define SUPPORTED_HCI_COMMANDS \ 152 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 153 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 154 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 155 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 156 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 157 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 158 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 159 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 160 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 161 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 162 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 163 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 164 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 165 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 166 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 167 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 168 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 169 170 // enumerate supported commands 171 #define X(name, offset, bit) name, 172 enum { 173 SUPPORTED_HCI_COMMANDS 174 SUPPORTED_HCI_COMMANDS_COUNT 175 }; 176 #undef X 177 178 // prototypes 179 #ifdef ENABLE_CLASSIC 180 static void hci_update_scan_enable(void); 181 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 182 static int hci_local_ssp_activated(void); 183 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 184 static bool hci_ssp_supported(hci_connection_t * connection); 185 static void hci_notify_if_sco_can_send_now(void); 186 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 187 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 188 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 189 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 190 static void hci_connection_timestamp(hci_connection_t *connection); 191 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 192 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 193 #endif 194 195 static int hci_power_control_on(void); 196 static void hci_power_control_off(void); 197 static void hci_state_reset(void); 198 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 199 static void hci_emit_transport_packet_sent(void); 200 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 201 static void hci_emit_nr_connections_changed(void); 202 static void hci_emit_hci_open_failed(void); 203 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 204 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 205 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 206 static void hci_run(void); 207 static int hci_is_le_connection(hci_connection_t * connection); 208 209 #ifdef ENABLE_CLASSIC 210 static int hci_have_usb_transport(void); 211 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 212 #endif 213 214 #ifdef ENABLE_BLE 215 static void hci_whitelist_free(void); 216 #ifdef ENABLE_LE_CENTRAL 217 // called from test/ble_client/advertising_data_parser.c 218 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 219 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 220 static hci_connection_t * gap_get_outgoing_connection(void); 221 static void hci_le_scan_stop(void); 222 static bool hci_run_general_gap_le(void); 223 #endif 224 #ifdef ENABLE_LE_PERIPHERAL 225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 226 static void hci_periodic_advertiser_list_free(void); 227 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 228 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 229 #endif /* ENABLE_LE_PERIPHERAL */ 230 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 231 static uint8_t hci_iso_stream_create(hci_con_handle_t con_handle, uint8_t big_handle); 232 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 233 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 234 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 235 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 236 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 237 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 238 static void hci_iso_notify_can_send_now(void); 239 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 240 static void hci_emit_big_terminated(const le_audio_big_t * big); 241 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 242 static void hci_emit_big_sync_stopped(const le_audio_big_sync_t * big_sync); 243 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 244 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 245 #endif /* ENABLE_BLE */ 246 247 // the STACK is here 248 #ifndef HAVE_MALLOC 249 static hci_stack_t hci_stack_static; 250 #endif 251 static hci_stack_t * hci_stack = NULL; 252 253 #ifdef ENABLE_CLASSIC 254 // default name 255 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 256 257 // test helper 258 static uint8_t disable_l2cap_timeouts = 0; 259 #endif 260 261 // reset connection state on create and on reconnect 262 // don't overwrite addr, con handle, role 263 static void hci_connection_init(hci_connection_t * conn){ 264 conn->authentication_flags = AUTH_FLAG_NONE; 265 conn->bonding_flags = 0; 266 conn->requested_security_level = LEVEL_0; 267 #ifdef ENABLE_CLASSIC 268 conn->request_role = HCI_ROLE_INVALID; 269 conn->sniff_subrating_max_latency = 0xffff; 270 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 271 conn->link_key_type = INVALID_LINK_KEY; 272 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 273 btstack_run_loop_set_timer_context(&conn->timeout, conn); 274 hci_connection_timestamp(conn); 275 #endif 276 conn->acl_recombination_length = 0; 277 conn->acl_recombination_pos = 0; 278 conn->num_packets_sent = 0; 279 280 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 281 #ifdef ENABLE_BLE 282 conn->le_phy_update_all_phys = 0xff; 283 #endif 284 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 285 conn->le_max_tx_octets = 27; 286 #endif 287 #ifdef ENABLE_CLASSIC_PAIRING_OOB 288 conn->classic_oob_c_192 = NULL; 289 conn->classic_oob_r_192 = NULL; 290 conn->classic_oob_c_256 = NULL; 291 conn->classic_oob_r_256 = NULL; 292 #endif 293 } 294 295 /** 296 * create connection for given address 297 * 298 * @return connection OR NULL, if no memory left 299 */ 300 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 301 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 302 303 hci_connection_t * conn = btstack_memory_hci_connection_get(); 304 if (!conn) return NULL; 305 hci_connection_init(conn); 306 307 bd_addr_copy(conn->address, addr); 308 conn->address_type = addr_type; 309 conn->con_handle = HCI_CON_HANDLE_INVALID; 310 conn->role = HCI_ROLE_INVALID; 311 312 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 313 314 return conn; 315 } 316 317 318 /** 319 * get le connection parameter range 320 * 321 * @return le connection parameter range struct 322 */ 323 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 324 *range = hci_stack->le_connection_parameter_range; 325 } 326 327 /** 328 * set le connection parameter range 329 * 330 */ 331 332 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 333 hci_stack->le_connection_parameter_range = *range; 334 } 335 336 /** 337 * @brief Test if connection parameters are inside in existing rage 338 * @param conn_interval_min (unit: 1.25ms) 339 * @param conn_interval_max (unit: 1.25ms) 340 * @param conn_latency 341 * @param supervision_timeout (unit: 10ms) 342 * @return 1 if included 343 */ 344 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){ 345 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 346 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 347 348 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 349 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 350 351 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 352 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 353 354 return 1; 355 } 356 357 /** 358 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 359 * @note: default: 1 360 * @param max_peripheral_connections 361 */ 362 #ifdef ENABLE_LE_PERIPHERAL 363 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 364 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 365 } 366 #endif 367 368 /** 369 * get hci connections iterator 370 * 371 * @return hci connections iterator 372 */ 373 374 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 375 btstack_linked_list_iterator_init(it, &hci_stack->connections); 376 } 377 378 /** 379 * get connection for a given handle 380 * 381 * @return connection OR NULL, if not found 382 */ 383 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 384 btstack_linked_list_iterator_t it; 385 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 386 while (btstack_linked_list_iterator_has_next(&it)){ 387 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 388 if ( item->con_handle == con_handle ) { 389 return item; 390 } 391 } 392 return NULL; 393 } 394 395 /** 396 * get connection for given address 397 * 398 * @return connection OR NULL, if not found 399 */ 400 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 401 btstack_linked_list_iterator_t it; 402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 403 while (btstack_linked_list_iterator_has_next(&it)){ 404 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 405 if (connection->address_type != addr_type) continue; 406 if (memcmp(addr, connection->address, 6) != 0) continue; 407 return connection; 408 } 409 return NULL; 410 } 411 412 #ifdef ENABLE_CLASSIC 413 414 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 415 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 416 } 417 418 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 419 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 420 } 421 422 #ifdef ENABLE_SCO_OVER_HCI 423 static int hci_number_sco_connections(void){ 424 int connections = 0; 425 btstack_linked_list_iterator_t it; 426 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 427 while (btstack_linked_list_iterator_has_next(&it)){ 428 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 429 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 430 connections++; 431 } 432 return connections; 433 } 434 #endif 435 436 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 437 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 438 #ifdef HAVE_EMBEDDED_TICK 439 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 440 // connections might be timed out 441 hci_emit_l2cap_check_timeout(connection); 442 } 443 #else 444 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 445 // connections might be timed out 446 hci_emit_l2cap_check_timeout(connection); 447 } 448 #endif 449 } 450 451 static void hci_connection_timestamp(hci_connection_t *connection){ 452 #ifdef HAVE_EMBEDDED_TICK 453 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 454 #else 455 connection->timestamp = btstack_run_loop_get_time_ms(); 456 #endif 457 } 458 459 /** 460 * add authentication flags and reset timer 461 * @note: assumes classic connection 462 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 463 */ 464 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 465 bd_addr_t addr; 466 reverse_bd_addr(bd_addr, addr); 467 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 468 if (conn) { 469 connectionSetAuthenticationFlags(conn, flags); 470 hci_connection_timestamp(conn); 471 } 472 } 473 474 static bool hci_pairing_active(hci_connection_t * hci_connection){ 475 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 476 } 477 478 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 479 if (hci_pairing_active(hci_connection)) return; 480 if (ssp){ 481 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 482 } else { 483 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 484 } 485 // if we are initiator, we have sent an HCI Authenticate Request 486 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 487 488 // if we are responder, use minimal service security level as required level 489 if (!initiator){ 490 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); 491 } 492 493 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 494 495 uint8_t event[12]; 496 event[0] = GAP_EVENT_PAIRING_STARTED; 497 event[1] = 10; 498 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 499 reverse_bd_addr(hci_connection->address, &event[4]); 500 event[10] = (uint8_t) ssp; 501 event[11] = (uint8_t) initiator; 502 hci_emit_event(event, sizeof(event), 1); 503 } 504 505 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 506 hci_connection->requested_security_level = LEVEL_0; 507 if (!hci_pairing_active(hci_connection)) return; 508 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 509 #ifdef ENABLE_CLASSIC_PAIRING_OOB 510 hci_connection->classic_oob_c_192 = NULL; 511 hci_connection->classic_oob_r_192 = NULL; 512 hci_connection->classic_oob_c_256 = NULL; 513 hci_connection->classic_oob_r_256 = NULL; 514 #endif 515 log_info("pairing complete, status %02x", status); 516 517 uint8_t event[11]; 518 event[0] = GAP_EVENT_PAIRING_COMPLETE; 519 event[1] = 9; 520 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 521 reverse_bd_addr(hci_connection->address, &event[4]); 522 event[10] = status; 523 hci_emit_event(event, sizeof(event), 1); 524 525 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 526 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 527 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 528 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 529 hci_connection->bonding_status = status; 530 } 531 } 532 533 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 534 hci_connection_t * conn = hci_connection_for_handle(handle); 535 if (!conn) return false; 536 return hci_pairing_active(conn); 537 } 538 539 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 540 if (!hci_stack->link_key_db) return; 541 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 542 hci_stack->link_key_db->delete_link_key(addr); 543 } 544 545 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 546 if (!hci_stack->link_key_db) return; 547 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 548 hci_stack->link_key_db->put_link_key(addr, link_key, type); 549 } 550 551 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 552 if (!hci_stack->link_key_db) return false; 553 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 554 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 555 return result; 556 } 557 558 void gap_delete_all_link_keys(void){ 559 bd_addr_t addr; 560 link_key_t link_key; 561 link_key_type_t type; 562 btstack_link_key_iterator_t it; 563 int ok = gap_link_key_iterator_init(&it); 564 if (!ok) { 565 log_error("could not initialize iterator"); 566 return; 567 } 568 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 569 gap_drop_link_key_for_bd_addr(addr); 570 } 571 gap_link_key_iterator_done(&it); 572 } 573 574 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 575 if (!hci_stack->link_key_db) return 0; 576 if (!hci_stack->link_key_db->iterator_init) return 0; 577 return hci_stack->link_key_db->iterator_init(it); 578 } 579 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){ 580 if (!hci_stack->link_key_db) return 0; 581 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 582 } 583 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 584 if (!hci_stack->link_key_db) return; 585 hci_stack->link_key_db->iterator_done(it); 586 } 587 #endif 588 589 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 590 switch (address_type){ 591 case BD_ADDR_TYPE_LE_PUBLIC: 592 case BD_ADDR_TYPE_LE_RANDOM: 593 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 594 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 595 return true; 596 default: 597 return false; 598 } 599 } 600 601 static int hci_is_le_connection(hci_connection_t * connection){ 602 return hci_is_le_connection_type(connection->address_type); 603 } 604 605 /** 606 * count connections 607 */ 608 static int nr_hci_connections(void){ 609 int count = 0; 610 btstack_linked_item_t *it; 611 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 612 count++; 613 } 614 return count; 615 } 616 617 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 618 619 unsigned int num_packets_sent_classic = 0; 620 unsigned int num_packets_sent_le = 0; 621 622 btstack_linked_item_t *it; 623 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 624 hci_connection_t * connection = (hci_connection_t *) it; 625 if (hci_is_le_connection(connection)){ 626 num_packets_sent_le += connection->num_packets_sent; 627 } 628 if (connection->address_type == BD_ADDR_TYPE_ACL){ 629 num_packets_sent_classic += connection->num_packets_sent; 630 } 631 } 632 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 633 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 634 int free_slots_le = 0; 635 636 if (free_slots_classic < 0){ 637 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); 638 return 0; 639 } 640 641 if (hci_stack->le_acl_packets_total_num){ 642 // if we have LE slots, they are used 643 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 644 if (free_slots_le < 0){ 645 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); 646 return 0; 647 } 648 } else { 649 // otherwise, classic slots are used for LE, too 650 free_slots_classic -= num_packets_sent_le; 651 if (free_slots_classic < 0){ 652 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); 653 return 0; 654 } 655 } 656 657 switch (address_type){ 658 case BD_ADDR_TYPE_UNKNOWN: 659 log_error("hci_number_free_acl_slots: unknown address type"); 660 return 0; 661 662 case BD_ADDR_TYPE_ACL: 663 return (uint16_t) free_slots_classic; 664 665 default: 666 if (hci_stack->le_acl_packets_total_num > 0){ 667 return (uint16_t) free_slots_le; 668 } 669 return (uint16_t) free_slots_classic; 670 } 671 } 672 673 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 674 // get connection type 675 hci_connection_t * connection = hci_connection_for_handle(con_handle); 676 if (!connection){ 677 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 678 return 0; 679 } 680 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 static int hci_number_free_sco_slots(void){ 685 unsigned int num_sco_packets_sent = 0; 686 btstack_linked_item_t *it; 687 if (hci_stack->synchronous_flow_control_enabled){ 688 // explicit flow control 689 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 690 hci_connection_t * connection = (hci_connection_t *) it; 691 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 692 num_sco_packets_sent += connection->num_packets_sent; 693 } 694 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 695 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 696 return 0; 697 } 698 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 699 } else { 700 // implicit flow control -- TODO 701 int num_ready = 0; 702 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 703 hci_connection_t * connection = (hci_connection_t *) it; 704 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 705 if (connection->sco_tx_ready == 0) continue; 706 num_ready++; 707 } 708 return num_ready; 709 } 710 } 711 #endif 712 713 // only used to send HCI Host Number Completed Packets 714 static int hci_can_send_comand_packet_transport(void){ 715 if (hci_stack->hci_packet_buffer_reserved) return 0; 716 717 // check for async hci transport implementations 718 if (hci_stack->hci_transport->can_send_packet_now){ 719 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 720 return 0; 721 } 722 } 723 return 1; 724 } 725 726 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 727 bool hci_can_send_command_packet_now(void){ 728 if (hci_can_send_comand_packet_transport() == 0) return false; 729 return hci_stack->num_cmd_packets > 0u; 730 } 731 732 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 733 // check for async hci transport implementations 734 if (!hci_stack->hci_transport->can_send_packet_now) return true; 735 return hci_stack->hci_transport->can_send_packet_now(packet_type); 736 } 737 738 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 739 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 740 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 741 } 742 743 bool hci_can_send_acl_le_packet_now(void){ 744 if (hci_stack->hci_packet_buffer_reserved) return false; 745 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 746 } 747 748 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 749 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 750 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 751 } 752 753 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 754 if (hci_stack->hci_packet_buffer_reserved) return false; 755 return hci_can_send_prepared_acl_packet_now(con_handle); 756 } 757 758 #ifdef ENABLE_CLASSIC 759 bool hci_can_send_acl_classic_packet_now(void){ 760 if (hci_stack->hci_packet_buffer_reserved) return false; 761 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 762 } 763 764 bool hci_can_send_prepared_sco_packet_now(void){ 765 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 766 if (hci_have_usb_transport()){ 767 return hci_stack->sco_can_send_now; 768 } else { 769 return hci_number_free_sco_slots() > 0; 770 } 771 } 772 773 bool hci_can_send_sco_packet_now(void){ 774 if (hci_stack->hci_packet_buffer_reserved) return false; 775 return hci_can_send_prepared_sco_packet_now(); 776 } 777 778 void hci_request_sco_can_send_now_event(void){ 779 hci_stack->sco_waiting_for_can_send_now = 1; 780 hci_notify_if_sco_can_send_now(); 781 } 782 #endif 783 784 // used for internal checks in l2cap.c 785 bool hci_is_packet_buffer_reserved(void){ 786 return hci_stack->hci_packet_buffer_reserved; 787 } 788 789 // reserves outgoing packet buffer. 790 // @return 1 if successful 791 bool hci_reserve_packet_buffer(void){ 792 if (hci_stack->hci_packet_buffer_reserved) { 793 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 794 return false; 795 } 796 hci_stack->hci_packet_buffer_reserved = true; 797 return true; 798 } 799 800 void hci_release_packet_buffer(void){ 801 hci_stack->hci_packet_buffer_reserved = false; 802 } 803 804 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 805 static int hci_transport_synchronous(void){ 806 return hci_stack->hci_transport->can_send_packet_now == NULL; 807 } 808 809 // used for debugging 810 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 811 static void hci_controller_dump_packets(void){ 812 // format: "{handle:04x}:{count:02d} " 813 char summaries[3][7 * 8 + 1]; 814 uint16_t totals[3]; 815 uint8_t index; 816 for (index = 0 ; index < 3 ; index++){ 817 summaries[index][0] = 0; 818 totals[index] = 0; 819 } 820 btstack_linked_item_t *it; 821 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 822 hci_connection_t * connection = (hci_connection_t *) it; 823 switch (connection->address_type){ 824 case BD_ADDR_TYPE_ACL: 825 index = 0; 826 break; 827 case BD_ADDR_TYPE_SCO: 828 index = 2; 829 break; 830 default: 831 index = 1; 832 break; 833 } 834 totals[index] += connection->num_packets_sent; 835 char item_text[10]; 836 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 837 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 838 } 839 for (index = 0 ; index < 3 ; index++){ 840 if (summaries[index][0] == 0){ 841 summaries[index][0] = '-'; 842 summaries[index][1] = 0; 843 } 844 } 845 log_info("Controller ACL BR/EDR: %s total %u / LE: %s total %u / SCO: %s total %u", summaries[0], totals[0], summaries[1], totals[1], summaries[2], totals[2]); 846 } 847 #endif 848 849 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 850 851 // 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); 852 853 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 854 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 855 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 856 max_acl_data_packet_length = hci_stack->le_data_packets_length; 857 } 858 859 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 860 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 861 max_acl_data_packet_length = connection->le_max_tx_octets; 862 } 863 #endif 864 865 log_debug("hci_send_acl_packet_fragments entered"); 866 867 uint8_t status = ERROR_CODE_SUCCESS; 868 // multiple packets could be send on a synchronous HCI transport 869 while (true){ 870 871 log_debug("hci_send_acl_packet_fragments loop entered"); 872 873 // get current data 874 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 875 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 876 bool more_fragments = false; 877 878 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 879 if (current_acl_data_packet_length > max_acl_data_packet_length){ 880 more_fragments = true; 881 current_acl_data_packet_length = max_acl_data_packet_length; 882 } 883 884 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 885 if (acl_header_pos > 0u){ 886 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 887 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 888 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 889 } 890 891 // update header len 892 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 893 894 // count packet 895 connection->num_packets_sent++; 896 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 897 898 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 899 if (more_fragments){ 900 // update start of next fragment to send 901 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 902 } else { 903 // done 904 hci_stack->acl_fragmentation_pos = 0; 905 hci_stack->acl_fragmentation_total_size = 0; 906 } 907 908 // send packet 909 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 910 const int size = current_acl_data_packet_length + 4; 911 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 912 hci_stack->acl_fragmentation_tx_active = 1; 913 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 914 if (err != 0){ 915 // no error from HCI Transport expected 916 status = ERROR_CODE_HARDWARE_FAILURE; 917 } 918 919 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 920 hci_controller_dump_packets(); 921 #endif 922 923 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 924 925 // done yet? 926 if (!more_fragments) break; 927 928 // can send more? 929 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 930 } 931 932 log_debug("hci_send_acl_packet_fragments loop over"); 933 934 // release buffer now for synchronous transport 935 if (hci_transport_synchronous()){ 936 hci_stack->acl_fragmentation_tx_active = 0; 937 hci_release_packet_buffer(); 938 hci_emit_transport_packet_sent(); 939 } 940 941 return status; 942 } 943 944 // pre: caller has reserved the packet buffer 945 uint8_t hci_send_acl_packet_buffer(int size){ 946 btstack_assert(hci_stack->hci_packet_buffer_reserved); 947 948 uint8_t * packet = hci_stack->hci_packet_buffer; 949 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 950 951 // check for free places on Bluetooth module 952 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 953 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 954 hci_release_packet_buffer(); 955 hci_emit_transport_packet_sent(); 956 return BTSTACK_ACL_BUFFERS_FULL; 957 } 958 959 hci_connection_t *connection = hci_connection_for_handle( con_handle); 960 if (!connection) { 961 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 962 hci_release_packet_buffer(); 963 hci_emit_transport_packet_sent(); 964 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 965 } 966 967 #ifdef ENABLE_CLASSIC 968 hci_connection_timestamp(connection); 969 #endif 970 971 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 972 973 // setup data 974 hci_stack->acl_fragmentation_total_size = size; 975 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 976 977 return hci_send_acl_packet_fragments(connection); 978 } 979 980 #ifdef ENABLE_CLASSIC 981 // pre: caller has reserved the packet buffer 982 uint8_t hci_send_sco_packet_buffer(int size){ 983 btstack_assert(hci_stack->hci_packet_buffer_reserved); 984 985 uint8_t * packet = hci_stack->hci_packet_buffer; 986 987 // skip checks in loopback mode 988 if (!hci_stack->loopback_mode){ 989 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 990 991 // check for free places on Bluetooth module 992 if (!hci_can_send_prepared_sco_packet_now()) { 993 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 994 hci_release_packet_buffer(); 995 hci_emit_transport_packet_sent(); 996 return BTSTACK_ACL_BUFFERS_FULL; 997 } 998 999 // track send packet in connection struct 1000 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1001 if (!connection) { 1002 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1003 hci_release_packet_buffer(); 1004 hci_emit_transport_packet_sent(); 1005 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1006 } 1007 1008 if (hci_have_usb_transport()){ 1009 // token used 1010 hci_stack->sco_can_send_now = false; 1011 } else { 1012 if (hci_stack->synchronous_flow_control_enabled){ 1013 connection->num_packets_sent++; 1014 } else { 1015 connection->sco_tx_ready--; 1016 } 1017 } 1018 } 1019 1020 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1021 1022 #ifdef HAVE_SCO_TRANSPORT 1023 hci_stack->sco_transport->send_packet(packet, size); 1024 hci_release_packet_buffer(); 1025 hci_emit_transport_packet_sent(); 1026 1027 return 0; 1028 #else 1029 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1030 if (hci_transport_synchronous()){ 1031 hci_release_packet_buffer(); 1032 hci_emit_transport_packet_sent(); 1033 } 1034 1035 if (err != 0){ 1036 return ERROR_CODE_HARDWARE_FAILURE; 1037 } 1038 return ERROR_CODE_SUCCESS; 1039 #endif 1040 } 1041 #endif 1042 1043 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1044 static uint8_t hci_send_iso_packet_fragments(void){ 1045 1046 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1047 uint8_t status = ERROR_CODE_SUCCESS; 1048 // multiple packets could be send on a synchronous HCI transport 1049 while (true){ 1050 1051 // get current data 1052 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1053 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1054 bool more_fragments = false; 1055 1056 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1057 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1058 more_fragments = true; 1059 current_iso_data_packet_length = max_iso_data_packet_length; 1060 } 1061 1062 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1063 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1064 uint8_t pb_flags; 1065 if (iso_header_pos == 0u){ 1066 // first fragment, keep TS field 1067 pb_flags = more_fragments ? 0x00 : 0x02; 1068 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1069 } else { 1070 // later fragment, drop TS field 1071 pb_flags = more_fragments ? 0x01 : 0x03; 1072 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1073 } 1074 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1075 1076 // update header len 1077 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1078 1079 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1080 if (more_fragments){ 1081 // update start of next fragment to send 1082 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1083 } else { 1084 // done 1085 hci_stack->iso_fragmentation_pos = 0; 1086 hci_stack->iso_fragmentation_total_size = 0; 1087 } 1088 1089 // send packet 1090 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1091 const int size = current_iso_data_packet_length + 4; 1092 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1093 hci_stack->iso_fragmentation_tx_active = true; 1094 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1095 if (err != 0){ 1096 // no error from HCI Transport expected 1097 status = ERROR_CODE_HARDWARE_FAILURE; 1098 } 1099 1100 // done yet? 1101 if (!more_fragments) break; 1102 1103 // can send more? 1104 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1105 } 1106 1107 // release buffer now for synchronous transport 1108 if (hci_transport_synchronous()){ 1109 hci_stack->iso_fragmentation_tx_active = false; 1110 hci_release_packet_buffer(); 1111 hci_emit_transport_packet_sent(); 1112 } 1113 1114 return status; 1115 } 1116 1117 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1118 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1119 1120 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1121 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1122 if (iso_stream == NULL){ 1123 hci_release_packet_buffer(); 1124 hci_iso_notify_can_send_now(); 1125 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1126 } 1127 1128 // TODO: check for space on controller 1129 1130 // skip iso packets if needed 1131 if (iso_stream->num_packets_to_skip > 0){ 1132 iso_stream->num_packets_to_skip--; 1133 // pretend it was processed and trigger next one 1134 hci_release_packet_buffer(); 1135 hci_iso_notify_can_send_now(); 1136 return ERROR_CODE_SUCCESS; 1137 } 1138 1139 // track outgoing packet sent 1140 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1141 iso_stream->num_packets_sent++; 1142 1143 // setup data 1144 hci_stack->iso_fragmentation_total_size = size; 1145 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1146 1147 return hci_send_iso_packet_fragments(); 1148 } 1149 #endif 1150 1151 static void acl_handler(uint8_t *packet, uint16_t size){ 1152 1153 // get info 1154 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1155 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1156 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1157 uint16_t acl_length = READ_ACL_LENGTH(packet); 1158 1159 // ignore non-registered handle 1160 if (!conn){ 1161 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1162 return; 1163 } 1164 1165 // assert packet is complete 1166 if ((acl_length + 4u) != size){ 1167 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1168 return; 1169 } 1170 1171 #ifdef ENABLE_CLASSIC 1172 // update idle timestamp 1173 hci_connection_timestamp(conn); 1174 #endif 1175 1176 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1177 hci_stack->host_completed_packets = 1; 1178 conn->num_packets_completed++; 1179 #endif 1180 1181 // handle different packet types 1182 switch (acl_flags & 0x03u) { 1183 1184 case 0x01: // continuation fragment 1185 1186 // sanity checks 1187 if (conn->acl_recombination_pos == 0u) { 1188 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1189 return; 1190 } 1191 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1192 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1193 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1194 conn->acl_recombination_pos = 0; 1195 return; 1196 } 1197 1198 // append fragment payload (header already stored) 1199 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1200 &packet[4], acl_length); 1201 conn->acl_recombination_pos += acl_length; 1202 1203 // forward complete L2CAP packet if complete. 1204 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1205 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1206 // reset recombination buffer 1207 conn->acl_recombination_length = 0; 1208 conn->acl_recombination_pos = 0; 1209 } 1210 break; 1211 1212 case 0x02: { // first fragment 1213 1214 // sanity check 1215 if (conn->acl_recombination_pos) { 1216 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1217 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1218 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1219 } 1220 conn->acl_recombination_pos = 0; 1221 } 1222 1223 // peek into L2CAP packet! 1224 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1225 1226 // compare fragment size to L2CAP packet size 1227 if (acl_length >= (l2cap_length + 4u)){ 1228 // forward fragment as L2CAP packet 1229 hci_emit_acl_packet(packet, acl_length + 4u); 1230 } else { 1231 1232 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1233 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1234 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1235 return; 1236 } 1237 1238 // store first fragment and tweak acl length for complete package 1239 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1240 packet, acl_length + 4u); 1241 conn->acl_recombination_pos = acl_length + 4u; 1242 conn->acl_recombination_length = l2cap_length; 1243 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1244 } 1245 break; 1246 1247 } 1248 default: 1249 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1250 return; 1251 } 1252 1253 // execute main loop 1254 hci_run(); 1255 } 1256 1257 static void hci_connection_stop_timer(hci_connection_t * conn){ 1258 btstack_run_loop_remove_timer(&conn->timeout); 1259 #ifdef ENABLE_CLASSIC 1260 btstack_run_loop_remove_timer(&conn->timeout_sco); 1261 #endif 1262 } 1263 1264 static void hci_shutdown_connection(hci_connection_t *conn){ 1265 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1266 1267 #ifdef ENABLE_CLASSIC 1268 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1269 bd_addr_type_t addr_type = conn->address_type; 1270 #endif 1271 #ifdef HAVE_SCO_TRANSPORT 1272 hci_con_handle_t con_handle = conn->con_handle; 1273 #endif 1274 #endif 1275 1276 hci_connection_stop_timer(conn); 1277 1278 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1279 btstack_memory_hci_connection_free( conn ); 1280 1281 // now it's gone 1282 hci_emit_nr_connections_changed(); 1283 1284 #ifdef ENABLE_CLASSIC 1285 #ifdef ENABLE_SCO_OVER_HCI 1286 // update SCO 1287 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1288 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1289 } 1290 #endif 1291 #ifdef HAVE_SCO_TRANSPORT 1292 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1293 hci_stack->sco_transport->close(con_handle); 1294 } 1295 #endif 1296 #endif 1297 } 1298 1299 #ifdef ENABLE_CLASSIC 1300 1301 static const uint16_t packet_type_sizes[] = { 1302 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1303 HCI_ACL_DH1_SIZE, 0, 0, 0, 1304 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1305 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1306 }; 1307 static const uint8_t packet_type_feature_requirement_bit[] = { 1308 0, // 3 slot packets 1309 1, // 5 slot packets 1310 25, // EDR 2 mpbs 1311 26, // EDR 3 mbps 1312 39, // 3 slot EDR packts 1313 40, // 5 slot EDR packet 1314 }; 1315 static const uint16_t packet_type_feature_packet_mask[] = { 1316 0x0f00, // 3 slot packets 1317 0xf000, // 5 slot packets 1318 0x1102, // EDR 2 mpbs 1319 0x2204, // EDR 3 mbps 1320 0x0300, // 3 slot EDR packts 1321 0x3000, // 5 slot EDR packet 1322 }; 1323 1324 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1325 // enable packet types based on size 1326 uint16_t packet_types = 0; 1327 unsigned int i; 1328 for (i=0;i<16;i++){ 1329 if (packet_type_sizes[i] == 0) continue; 1330 if (packet_type_sizes[i] <= buffer_size){ 1331 packet_types |= 1 << i; 1332 } 1333 } 1334 // disable packet types due to missing local supported features 1335 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1336 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1337 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1338 if (feature_set) continue; 1339 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1340 packet_types &= ~packet_type_feature_packet_mask[i]; 1341 } 1342 // flip bits for "may not be used" 1343 packet_types ^= 0x3306; 1344 return packet_types; 1345 } 1346 1347 uint16_t hci_usable_acl_packet_types(void){ 1348 return hci_stack->packet_types; 1349 } 1350 #endif 1351 1352 uint8_t* hci_get_outgoing_packet_buffer(void){ 1353 // hci packet buffer is >= acl data packet length 1354 return hci_stack->hci_packet_buffer; 1355 } 1356 1357 uint16_t hci_max_acl_data_packet_length(void){ 1358 return hci_stack->acl_data_packet_length; 1359 } 1360 1361 #ifdef ENABLE_CLASSIC 1362 bool hci_extended_sco_link_supported(void){ 1363 // No. 31, byte 3, bit 7 1364 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1365 } 1366 #endif 1367 1368 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1369 // No. 54, byte 6, bit 6 1370 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1371 } 1372 1373 #ifdef ENABLE_CLASSIC 1374 static int gap_ssp_supported(void){ 1375 // No. 51, byte 6, bit 3 1376 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1377 } 1378 #endif 1379 1380 static int hci_classic_supported(void){ 1381 #ifdef ENABLE_CLASSIC 1382 // No. 37, byte 4, bit 5, = No BR/EDR Support 1383 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1384 #else 1385 return 0; 1386 #endif 1387 } 1388 1389 static int hci_le_supported(void){ 1390 #ifdef ENABLE_BLE 1391 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1392 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1393 #else 1394 return 0; 1395 #endif 1396 } 1397 1398 static bool hci_command_supported(uint8_t command_index){ 1399 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1400 } 1401 1402 #ifdef ENABLE_BLE 1403 1404 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1405 static bool hci_extended_advertising_supported(void){ 1406 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1407 } 1408 #endif 1409 1410 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1411 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1412 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1413 } else { 1414 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1415 } 1416 } 1417 1418 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1419 *addr_type = hci_stack->le_own_addr_type; 1420 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1421 } 1422 1423 #ifdef ENABLE_LE_PERIPHERAL 1424 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1425 *addr_type = hci_stack->le_advertisements_own_addr_type; 1426 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1427 }; 1428 #endif 1429 1430 #ifdef ENABLE_LE_CENTRAL 1431 1432 /** 1433 * @brief Get own addr type and address used for LE connections (Central) 1434 */ 1435 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1436 *addr_type = hci_stack->le_connection_own_addr_type; 1437 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1438 } 1439 1440 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1441 1442 uint16_t offset = 3; 1443 uint8_t num_reports = packet[offset]; 1444 offset += 1; 1445 1446 uint16_t i; 1447 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1448 for (i=0; (i<num_reports) && (offset < size);i++){ 1449 // sanity checks on data_length: 1450 uint8_t data_length = packet[offset + 8]; 1451 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1452 if ((offset + 9u + data_length + 1u) > size) return; 1453 // setup event 1454 uint8_t event_size = 10u + data_length; 1455 uint16_t pos = 0; 1456 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1457 event[pos++] = event_size; 1458 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1459 offset += 8; 1460 pos += 8; 1461 event[pos++] = packet[offset + 1 + data_length]; // rssi 1462 event[pos++] = data_length; 1463 offset++; 1464 (void)memcpy(&event[pos], &packet[offset], data_length); 1465 pos += data_length; 1466 offset += data_length + 1u; // rssi 1467 hci_emit_event(event, pos, 1); 1468 } 1469 } 1470 1471 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1472 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1473 uint16_t offset = 3; 1474 uint8_t num_reports = packet[offset++]; 1475 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1476 uint8_t i; 1477 for (i=0; (i<num_reports) && (offset < size);i++){ 1478 // sanity checks on data_length: 1479 uint16_t data_length = packet[offset + 23]; 1480 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1481 if ((offset + 24u + data_length) > size) return; 1482 uint16_t event_type = little_endian_read_16(packet, offset); 1483 offset += 2; 1484 if ((event_type & 0x10) != 0) { 1485 // setup legacy event 1486 uint8_t legacy_event_type; 1487 switch (event_type){ 1488 case 0b0010011: 1489 // ADV_IND 1490 legacy_event_type = 0; 1491 break; 1492 case 0b0010101: 1493 // ADV_DIRECT_IND 1494 legacy_event_type = 1; 1495 break; 1496 case 0b0010010: 1497 // ADV_SCAN_IND 1498 legacy_event_type = 2; 1499 break; 1500 case 0b0010000: 1501 // ADV_NONCONN_IND 1502 legacy_event_type = 3; 1503 break; 1504 case 0b0011011: 1505 case 0b0011010: 1506 // SCAN_RSP 1507 legacy_event_type = 4; 1508 break; 1509 default: 1510 legacy_event_type = 0; 1511 break; 1512 } 1513 uint16_t pos = 0; 1514 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1515 event[pos++] = 10u + data_length; 1516 event[pos++] = legacy_event_type; 1517 // copy address type + address 1518 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1519 offset += 7; 1520 pos += 7; 1521 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1522 offset += 4; 1523 // copy rssi 1524 event[pos++] = packet[offset++]; 1525 // skip periodic advertising interval and direct address 1526 offset += 9; 1527 // copy data len + data; 1528 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1529 pos += 1 +data_length; 1530 offset += 1+ data_length; 1531 hci_emit_event(event, pos, 1); 1532 } else { 1533 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1534 uint8_t report_len = 24 + data_length; 1535 event[1] = report_len; 1536 little_endian_store_16(event, 2, event_type); 1537 memcpy(&event[4], &packet[offset], report_len); 1538 offset += report_len; 1539 hci_emit_event(event, 2 + report_len, 1); 1540 } 1541 } 1542 } 1543 #endif 1544 1545 #endif 1546 #endif 1547 1548 #ifdef ENABLE_BLE 1549 #ifdef ENABLE_LE_PERIPHERAL 1550 static void hci_update_advertisements_enabled_for_current_roles(void){ 1551 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1552 // get number of active le slave connections 1553 int num_slave_connections = 0; 1554 btstack_linked_list_iterator_t it; 1555 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1556 while (btstack_linked_list_iterator_has_next(&it)){ 1557 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1558 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1559 if (con->state != OPEN) continue; 1560 if (con->role != HCI_ROLE_SLAVE) continue; 1561 if (!hci_is_le_connection(con)) continue; 1562 num_slave_connections++; 1563 } 1564 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1565 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1566 } else { 1567 hci_stack->le_advertisements_enabled_for_current_roles = false; 1568 } 1569 } 1570 #endif 1571 #endif 1572 1573 #ifdef ENABLE_CLASSIC 1574 static void gap_run_set_local_name(void){ 1575 hci_reserve_packet_buffer(); 1576 uint8_t * packet = hci_stack->hci_packet_buffer; 1577 // construct HCI Command and send 1578 uint16_t opcode = hci_write_local_name.opcode; 1579 hci_stack->last_cmd_opcode = opcode; 1580 packet[0] = opcode & 0xff; 1581 packet[1] = opcode >> 8; 1582 packet[2] = DEVICE_NAME_LEN; 1583 memset(&packet[3], 0, DEVICE_NAME_LEN); 1584 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1585 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1586 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1587 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1588 // expand '00:00:00:00:00:00' in name with bd_addr 1589 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1590 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1591 } 1592 1593 static void gap_run_set_eir_data(void){ 1594 hci_reserve_packet_buffer(); 1595 uint8_t * packet = hci_stack->hci_packet_buffer; 1596 // construct HCI Command in-place and send 1597 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1598 hci_stack->last_cmd_opcode = opcode; 1599 uint16_t offset = 0; 1600 packet[offset++] = opcode & 0xff; 1601 packet[offset++] = opcode >> 8; 1602 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1603 packet[offset++] = 0; // FEC not required 1604 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1605 if (hci_stack->eir_data){ 1606 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1607 ad_context_t context; 1608 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1609 uint8_t data_type = ad_iterator_get_data_type(&context); 1610 uint8_t size = ad_iterator_get_data_len(&context); 1611 const uint8_t *data = ad_iterator_get_data(&context); 1612 // copy item 1613 packet[offset++] = size + 1; 1614 packet[offset++] = data_type; 1615 memcpy(&packet[offset], data, size); 1616 // update name item 1617 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1618 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1619 } 1620 offset += size; 1621 } 1622 } else { 1623 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1624 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1625 packet[offset++] = bytes_to_copy + 1; 1626 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1627 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1628 // expand '00:00:00:00:00:00' in name with bd_addr 1629 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1630 } 1631 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1632 } 1633 1634 static void hci_run_gap_tasks_classic(void){ 1635 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1636 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1637 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1638 return; 1639 } 1640 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1641 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1642 gap_run_set_local_name(); 1643 return; 1644 } 1645 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1646 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1647 gap_run_set_eir_data(); 1648 return; 1649 } 1650 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1651 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1652 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1653 return; 1654 } 1655 // write page scan activity 1656 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1657 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1658 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1659 return; 1660 } 1661 // write page scan type 1662 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1663 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1664 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1665 return; 1666 } 1667 // write page timeout 1668 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1669 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1670 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1671 return; 1672 } 1673 // send scan enable 1674 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1675 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1676 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1677 return; 1678 } 1679 // send write scan activity 1680 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1681 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1682 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1683 return; 1684 } 1685 } 1686 #endif 1687 1688 #ifndef HAVE_HOST_CONTROLLER_API 1689 1690 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1691 if (!hci_stack->config) return 0; 1692 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1693 // Limit baud rate for Broadcom chipsets to 3 mbps 1694 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1695 baud_rate = 3000000; 1696 } 1697 return baud_rate; 1698 } 1699 1700 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1701 UNUSED(ds); 1702 1703 switch (hci_stack->substate){ 1704 case HCI_INIT_W4_SEND_RESET: 1705 log_info("Resend HCI Reset"); 1706 hci_stack->substate = HCI_INIT_SEND_RESET; 1707 hci_stack->num_cmd_packets = 1; 1708 hci_run(); 1709 break; 1710 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1711 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1712 if (hci_stack->hci_transport->reset_link){ 1713 hci_stack->hci_transport->reset_link(); 1714 } 1715 1716 /* fall through */ 1717 1718 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1719 log_info("Resend HCI Reset - CSR Warm Boot"); 1720 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1721 hci_stack->num_cmd_packets = 1; 1722 hci_run(); 1723 break; 1724 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1725 if (hci_stack->hci_transport->set_baudrate){ 1726 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1727 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1728 hci_stack->hci_transport->set_baudrate(baud_rate); 1729 } 1730 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1731 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1732 if (hci_stack->hci_transport->reset_link){ 1733 log_info("Link Reset"); 1734 hci_stack->hci_transport->reset_link(); 1735 } 1736 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1737 hci_run(); 1738 } 1739 break; 1740 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1741 // otherwise continue 1742 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1743 hci_send_cmd(&hci_read_local_supported_commands); 1744 break; 1745 default: 1746 break; 1747 } 1748 } 1749 #endif 1750 1751 static void hci_initializing_next_state(void){ 1752 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1753 } 1754 1755 static void hci_init_done(void){ 1756 // done. tell the app 1757 log_info("hci_init_done -> HCI_STATE_WORKING"); 1758 hci_stack->state = HCI_STATE_WORKING; 1759 hci_emit_state(); 1760 } 1761 1762 // assumption: hci_can_send_command_packet_now() == true 1763 static void hci_initializing_run(void){ 1764 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1765 1766 if (!hci_can_send_command_packet_now()) return; 1767 1768 #ifndef HAVE_HOST_CONTROLLER_API 1769 bool need_baud_change = hci_stack->config 1770 && hci_stack->chipset 1771 && hci_stack->chipset->set_baudrate_command 1772 && hci_stack->hci_transport->set_baudrate 1773 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1774 #endif 1775 1776 switch (hci_stack->substate){ 1777 case HCI_INIT_SEND_RESET: 1778 hci_state_reset(); 1779 1780 #ifndef HAVE_HOST_CONTROLLER_API 1781 // prepare reset if command complete not received in 100ms 1782 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1783 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1784 btstack_run_loop_add_timer(&hci_stack->timeout); 1785 #endif 1786 // send command 1787 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1788 hci_send_cmd(&hci_reset); 1789 break; 1790 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1791 hci_send_cmd(&hci_read_local_version_information); 1792 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1793 break; 1794 1795 #ifndef HAVE_HOST_CONTROLLER_API 1796 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1797 hci_state_reset(); 1798 // prepare reset if command complete not received in 100ms 1799 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1800 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1801 btstack_run_loop_add_timer(&hci_stack->timeout); 1802 // send command 1803 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1804 hci_send_cmd(&hci_reset); 1805 break; 1806 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1807 hci_state_reset(); 1808 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1809 hci_send_cmd(&hci_reset); 1810 break; 1811 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1812 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1813 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1814 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1815 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1816 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1817 break; 1818 } 1819 case HCI_INIT_SET_BD_ADDR: 1820 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1821 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1822 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1823 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1824 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1825 break; 1826 case HCI_INIT_SEND_READ_LOCAL_NAME: 1827 #ifdef ENABLE_CLASSIC 1828 hci_send_cmd(&hci_read_local_name); 1829 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1830 break; 1831 #endif 1832 /* fall through */ 1833 1834 case HCI_INIT_SEND_BAUD_CHANGE: 1835 if (need_baud_change) { 1836 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1837 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1838 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1839 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1840 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1841 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1842 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1843 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1844 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1845 btstack_run_loop_add_timer(&hci_stack->timeout); 1846 } 1847 break; 1848 } 1849 1850 /* fall through */ 1851 1852 case HCI_INIT_CUSTOM_INIT: 1853 // Custom initialization 1854 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1855 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1856 bool send_cmd = false; 1857 switch (hci_stack->chipset_result){ 1858 case BTSTACK_CHIPSET_VALID_COMMAND: 1859 send_cmd = true; 1860 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1861 break; 1862 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1863 send_cmd = true; 1864 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1865 log_info("CSR Warm Boot"); 1866 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1867 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1868 btstack_run_loop_add_timer(&hci_stack->timeout); 1869 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1870 && hci_stack->config 1871 && hci_stack->chipset 1872 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1873 && hci_stack->hci_transport->set_baudrate 1874 && hci_transport_uart_get_main_baud_rate()){ 1875 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1876 } else { 1877 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1878 } 1879 break; 1880 default: 1881 break; 1882 } 1883 1884 if (send_cmd){ 1885 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1886 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1887 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1888 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1889 break; 1890 } 1891 log_info("Init script done"); 1892 1893 // Init script download on Broadcom chipsets causes: 1894 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1895 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1896 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1897 1898 // - baud rate to reset, restore UART baud rate if needed 1899 if (need_baud_change) { 1900 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1901 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1902 hci_stack->hci_transport->set_baudrate(baud_rate); 1903 } 1904 1905 uint16_t bcm_delay_ms = 300; 1906 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1907 // -> Work around: wait here. 1908 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1909 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1910 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1911 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1912 btstack_run_loop_add_timer(&hci_stack->timeout); 1913 break; 1914 } 1915 } 1916 #endif 1917 /* fall through */ 1918 1919 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1920 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1921 hci_send_cmd(&hci_read_local_supported_commands); 1922 break; 1923 case HCI_INIT_READ_BD_ADDR: 1924 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1925 hci_send_cmd(&hci_read_bd_addr); 1926 break; 1927 case HCI_INIT_READ_BUFFER_SIZE: 1928 // only read buffer size if supported 1929 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1930 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1931 hci_send_cmd(&hci_read_buffer_size); 1932 break; 1933 } 1934 1935 /* fall through */ 1936 1937 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1938 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1939 hci_send_cmd(&hci_read_local_supported_features); 1940 break; 1941 1942 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1943 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1944 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1945 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1946 break; 1947 case HCI_INIT_HOST_BUFFER_SIZE: 1948 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1949 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1950 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1951 break; 1952 #endif 1953 1954 case HCI_INIT_SET_EVENT_MASK: 1955 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1956 if (hci_le_supported()){ 1957 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1958 } else { 1959 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1960 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1961 } 1962 break; 1963 1964 case HCI_INIT_SET_EVENT_MASK_2: 1965 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1966 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1967 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1968 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1969 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1970 // Encryption Change Event v2 - bit 25 1971 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1972 break; 1973 } 1974 1975 #ifdef ENABLE_CLASSIC 1976 /* fall through */ 1977 1978 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1979 if (hci_classic_supported() && gap_ssp_supported()){ 1980 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1981 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1982 break; 1983 } 1984 1985 /* fall through */ 1986 1987 case HCI_INIT_WRITE_INQUIRY_MODE: 1988 if (hci_classic_supported()){ 1989 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1990 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1991 break; 1992 } 1993 1994 /* fall through */ 1995 1996 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1997 // skip write secure connections host support if not supported or disabled 1998 if (hci_classic_supported() && hci_stack->secure_connections_enable 1999 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2000 hci_stack->secure_connections_active = true; 2001 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2002 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2003 break; 2004 } 2005 2006 /* fall through */ 2007 2008 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2009 // skip set min encryption key size 2010 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2011 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2012 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2013 break; 2014 } 2015 2016 #ifdef ENABLE_SCO_OVER_HCI 2017 /* fall through */ 2018 2019 // only sent if ENABLE_SCO_OVER_HCI is defined 2020 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2021 // skip write synchronous flow control if not supported 2022 if (hci_classic_supported() 2023 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2024 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2025 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2026 break; 2027 } 2028 /* fall through */ 2029 2030 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2031 // skip write default erroneous data reporting if not supported 2032 if (hci_classic_supported() 2033 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2034 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2035 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2036 break; 2037 } 2038 #endif 2039 2040 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2041 /* fall through */ 2042 2043 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2044 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2045 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2046 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2047 #ifdef ENABLE_SCO_OVER_HCI 2048 log_info("BCM: Route SCO data via HCI transport"); 2049 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2050 #endif 2051 #ifdef ENABLE_SCO_OVER_PCM 2052 log_info("BCM: Route SCO data via PCM interface"); 2053 #ifdef ENABLE_BCM_PCM_WBS 2054 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2055 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2056 #else 2057 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2058 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2059 #endif 2060 #endif 2061 break; 2062 } 2063 #endif 2064 2065 #ifdef ENABLE_SCO_OVER_PCM 2066 /* fall through */ 2067 2068 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2069 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2070 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2071 log_info("BCM: Config PCM interface for I2S"); 2072 #ifdef ENABLE_BCM_PCM_WBS 2073 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2074 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2075 #else 2076 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2077 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2078 #endif 2079 break; 2080 } 2081 #endif 2082 #endif 2083 2084 #ifdef ENABLE_BLE 2085 /* fall through */ 2086 2087 // LE INIT 2088 case HCI_INIT_LE_READ_BUFFER_SIZE: 2089 if (hci_le_supported()){ 2090 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2091 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2092 hci_send_cmd(&hci_le_read_buffer_size_v2); 2093 } else { 2094 hci_send_cmd(&hci_le_read_buffer_size); 2095 } 2096 break; 2097 } 2098 2099 /* fall through */ 2100 2101 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2102 // skip write le host if not supported (e.g. on LE only EM9301) 2103 if (hci_le_supported() 2104 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2105 // LE Supported Host = 1, Simultaneous Host = 0 2106 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2107 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2108 break; 2109 } 2110 2111 /* fall through */ 2112 2113 case HCI_INIT_LE_SET_EVENT_MASK: 2114 if (hci_le_supported()){ 2115 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2116 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2117 break; 2118 } 2119 #endif 2120 2121 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2122 /* fall through */ 2123 2124 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2125 if (hci_le_supported() 2126 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2127 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2128 hci_send_cmd(&hci_le_read_maximum_data_length); 2129 break; 2130 } 2131 2132 /* fall through */ 2133 2134 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2135 if (hci_le_supported() 2136 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2137 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2138 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2139 break; 2140 } 2141 #endif 2142 2143 #ifdef ENABLE_LE_CENTRAL 2144 /* fall through */ 2145 2146 case HCI_INIT_READ_WHITE_LIST_SIZE: 2147 if (hci_le_supported()){ 2148 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2149 hci_send_cmd(&hci_le_read_white_list_size); 2150 break; 2151 } 2152 2153 #endif 2154 2155 #ifdef ENABLE_LE_PERIPHERAL 2156 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2157 /* fall through */ 2158 2159 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2160 if (hci_extended_advertising_supported()){ 2161 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2162 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2163 break; 2164 } 2165 #endif 2166 #endif 2167 /* fall through */ 2168 2169 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2170 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2171 if (hci_le_supported()) { 2172 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2173 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2174 break; 2175 } 2176 #endif 2177 2178 /* fall through */ 2179 2180 case HCI_INIT_DONE: 2181 hci_stack->substate = HCI_INIT_DONE; 2182 // main init sequence complete 2183 #ifdef ENABLE_CLASSIC 2184 // check if initial Classic GAP Tasks are completed 2185 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2186 hci_run_gap_tasks_classic(); 2187 break; 2188 } 2189 #endif 2190 #ifdef ENABLE_BLE 2191 #ifdef ENABLE_LE_CENTRAL 2192 // check if initial LE GAP Tasks are completed 2193 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2194 hci_run_general_gap_le(); 2195 break; 2196 } 2197 #endif 2198 #endif 2199 hci_init_done(); 2200 break; 2201 2202 default: 2203 return; 2204 } 2205 } 2206 2207 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2208 bool command_completed = false; 2209 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2210 uint16_t opcode = little_endian_read_16(packet,3); 2211 if (opcode == hci_stack->last_cmd_opcode){ 2212 command_completed = true; 2213 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2214 } else { 2215 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2216 } 2217 } 2218 2219 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2220 uint8_t status = packet[2]; 2221 uint16_t opcode = little_endian_read_16(packet,4); 2222 if (opcode == hci_stack->last_cmd_opcode){ 2223 if (status){ 2224 command_completed = true; 2225 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2226 } else { 2227 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2228 } 2229 } else { 2230 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2231 } 2232 } 2233 #ifndef HAVE_HOST_CONTROLLER_API 2234 // Vendor == CSR 2235 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2236 // TODO: track actual command 2237 command_completed = true; 2238 } 2239 2240 // Vendor == Toshiba 2241 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2242 // TODO: track actual command 2243 command_completed = true; 2244 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2245 hci_stack->num_cmd_packets = 1; 2246 } 2247 #endif 2248 2249 return command_completed; 2250 } 2251 2252 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2253 2254 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2255 2256 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2257 2258 #ifndef HAVE_HOST_CONTROLLER_API 2259 2260 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2261 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2262 // 2263 // HCI Reset 2264 // Timeout 100 ms 2265 // HCI Reset 2266 // Command Complete Reset 2267 // HCI Read Local Version Information 2268 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2269 // hang... 2270 // 2271 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2272 if (!command_completed 2273 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2274 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2275 2276 uint16_t opcode = little_endian_read_16(packet,3); 2277 if (opcode == hci_reset.opcode){ 2278 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2279 return; 2280 } 2281 } 2282 2283 // CSR & H5 2284 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2285 if (!command_completed 2286 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2287 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2288 2289 uint16_t opcode = little_endian_read_16(packet,3); 2290 if (opcode == hci_reset.opcode){ 2291 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2292 return; 2293 } 2294 } 2295 2296 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2297 // fix: Correct substate and behave as command below 2298 if (command_completed){ 2299 switch (hci_stack->substate){ 2300 case HCI_INIT_SEND_RESET: 2301 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2302 break; 2303 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2304 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2305 break; 2306 default: 2307 break; 2308 } 2309 } 2310 2311 #endif 2312 2313 if (!command_completed) return; 2314 2315 bool need_baud_change = false; 2316 bool need_addr_change = false; 2317 2318 #ifndef HAVE_HOST_CONTROLLER_API 2319 need_baud_change = hci_stack->config 2320 && hci_stack->chipset 2321 && hci_stack->chipset->set_baudrate_command 2322 && hci_stack->hci_transport->set_baudrate 2323 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2324 2325 need_addr_change = hci_stack->custom_bd_addr_set 2326 && hci_stack->chipset 2327 && hci_stack->chipset->set_bd_addr_command; 2328 #endif 2329 2330 switch(hci_stack->substate){ 2331 2332 #ifndef HAVE_HOST_CONTROLLER_API 2333 case HCI_INIT_SEND_RESET: 2334 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2335 // fix: just correct substate and behave as command below 2336 2337 /* fall through */ 2338 #endif 2339 2340 case HCI_INIT_W4_SEND_RESET: 2341 btstack_run_loop_remove_timer(&hci_stack->timeout); 2342 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2343 return; 2344 2345 #ifndef HAVE_HOST_CONTROLLER_API 2346 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2347 // for STLC2500D, baud rate change already happened. 2348 // for others, baud rate gets changed now 2349 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2350 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2351 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2352 hci_stack->hci_transport->set_baudrate(baud_rate); 2353 } 2354 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2355 return; 2356 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2357 btstack_run_loop_remove_timer(&hci_stack->timeout); 2358 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2359 return; 2360 case HCI_INIT_W4_CUSTOM_INIT: 2361 // repeat custom init 2362 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2363 return; 2364 #endif 2365 2366 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2367 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2368 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2369 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2370 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2371 return; 2372 } 2373 if (need_addr_change){ 2374 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2375 return; 2376 } 2377 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2378 return; 2379 #ifndef HAVE_HOST_CONTROLLER_API 2380 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2381 if (need_baud_change){ 2382 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2383 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2384 hci_stack->hci_transport->set_baudrate(baud_rate); 2385 } 2386 if (need_addr_change){ 2387 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2388 return; 2389 } 2390 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2391 return; 2392 case HCI_INIT_W4_SET_BD_ADDR: 2393 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2394 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2395 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2396 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2397 return; 2398 } 2399 // skipping st warm boot 2400 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2401 return; 2402 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2403 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2404 return; 2405 #endif 2406 2407 case HCI_INIT_DONE: 2408 // set state if we came here by fall through 2409 hci_stack->substate = HCI_INIT_DONE; 2410 return; 2411 2412 default: 2413 break; 2414 } 2415 hci_initializing_next_state(); 2416 } 2417 2418 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2419 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2420 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2421 // check if we have been aware of the HCI connection 2422 switch (conn->state){ 2423 case SENT_CREATE_CONNECTION: 2424 case RECEIVED_CONNECTION_REQUEST: 2425 break; 2426 default: 2427 return; 2428 } 2429 2430 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2431 bd_addr_t bd_address; 2432 (void)memcpy(&bd_address, conn->address, 6); 2433 2434 #ifdef ENABLE_CLASSIC 2435 // cache needed data 2436 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2437 #endif 2438 2439 // connection failed, remove entry 2440 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2441 btstack_memory_hci_connection_free( conn ); 2442 2443 #ifdef ENABLE_CLASSIC 2444 // notify client if dedicated bonding 2445 if (notify_dedicated_bonding_failed){ 2446 log_info("hci notify_dedicated_bonding_failed"); 2447 hci_emit_dedicated_bonding_result(bd_address, status); 2448 } 2449 2450 // if authentication error, also delete link key 2451 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2452 gap_drop_link_key_for_bd_addr(bd_address); 2453 } 2454 #else 2455 UNUSED(status); 2456 #endif 2457 } 2458 2459 #ifdef ENABLE_CLASSIC 2460 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2461 // SSP Controller 2462 if (features[6] & (1 << 3)){ 2463 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2464 } 2465 // eSCO 2466 if (features[3] & (1<<7)){ 2467 conn->remote_supported_features[0] |= 1; 2468 } 2469 // Extended features 2470 if (features[7] & (1<<7)){ 2471 conn->remote_supported_features[0] |= 2; 2472 } 2473 } 2474 2475 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2476 // SSP Host 2477 if (features[0] & (1 << 0)){ 2478 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2479 } 2480 // SC Host 2481 if (features[0] & (1 << 3)){ 2482 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2483 } 2484 } 2485 2486 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2487 // SC Controller 2488 if (features[1] & (1 << 0)){ 2489 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2490 } 2491 } 2492 2493 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2494 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2495 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2496 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2497 if (conn->bonding_flags & BONDING_DEDICATED){ 2498 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2499 } 2500 } 2501 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2502 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2503 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2504 } 2505 2506 #endif 2507 2508 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2509 // handle BT initialization 2510 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2511 hci_initializing_event_handler(packet, size); 2512 } 2513 2514 // help with BT sleep 2515 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2516 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2517 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2518 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2519 hci_initializing_next_state(); 2520 } 2521 } 2522 2523 #ifdef ENABLE_CLASSIC 2524 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2525 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2526 conn->encryption_key_size = encryption_key_size; 2527 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2528 2529 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2530 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2531 conn->bonding_flags &= ~BONDING_DEDICATED; 2532 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2533 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2534 return; 2535 } 2536 2537 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2538 conn->requested_security_level = LEVEL_0; 2539 hci_emit_security_level(conn->con_handle, security_level); 2540 return; 2541 } 2542 2543 // Request remote features if not already done 2544 hci_trigger_remote_features_for_connection(conn); 2545 2546 // Request Authentication if not already done 2547 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2548 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2549 } 2550 #endif 2551 2552 static void hci_store_local_supported_commands(const uint8_t * packet){ 2553 // create mapping table 2554 #define X(name, offset, bit) { offset, bit }, 2555 static struct { 2556 uint8_t byte_offset; 2557 uint8_t bit_position; 2558 } supported_hci_commands_map [] = { 2559 SUPPORTED_HCI_COMMANDS 2560 }; 2561 #undef X 2562 2563 // create names for debug purposes 2564 #ifdef ENABLE_LOG_DEBUG 2565 #define X(name, offset, bit) #name, 2566 static const char * command_names[] = { 2567 SUPPORTED_HCI_COMMANDS 2568 }; 2569 #undef X 2570 #endif 2571 2572 hci_stack->local_supported_commands = 0; 2573 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2574 uint16_t i; 2575 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2576 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2577 #ifdef ENABLE_LOG_DEBUG 2578 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); 2579 #else 2580 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2581 #endif 2582 hci_stack->local_supported_commands |= (1LU << i); 2583 } 2584 } 2585 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2586 } 2587 2588 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2589 UNUSED(size); 2590 2591 uint16_t manufacturer; 2592 #ifdef ENABLE_CLASSIC 2593 hci_con_handle_t handle; 2594 hci_connection_t * conn; 2595 #endif 2596 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2597 uint8_t status; 2598 #endif 2599 // get num cmd packets - limit to 1 to reduce complexity 2600 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2601 2602 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2603 switch (opcode){ 2604 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2605 if (packet[5]) break; 2606 // terminate, name 248 chars 2607 packet[6+248] = 0; 2608 log_info("local name: %s", &packet[6]); 2609 break; 2610 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2611 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2612 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2613 uint16_t acl_len = little_endian_read_16(packet, 6); 2614 uint16_t sco_len = packet[8]; 2615 2616 // determine usable ACL/SCO payload size 2617 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2618 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2619 2620 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2621 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2622 2623 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2624 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2625 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2626 } 2627 break; 2628 case HCI_OPCODE_HCI_READ_RSSI: 2629 if (packet[5] == ERROR_CODE_SUCCESS){ 2630 uint8_t event[5]; 2631 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2632 event[1] = 3; 2633 (void)memcpy(&event[2], &packet[6], 3); 2634 hci_emit_event(event, sizeof(event), 1); 2635 } 2636 break; 2637 #ifdef ENABLE_BLE 2638 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2639 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2640 hci_stack->le_iso_packets_total_num = packet[11]; 2641 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2642 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2643 2644 /* fall through */ 2645 2646 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2647 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2648 hci_stack->le_acl_packets_total_num = packet[8]; 2649 // determine usable ACL payload size 2650 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2651 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2652 } 2653 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); 2654 break; 2655 #endif 2656 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2657 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2658 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2659 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2660 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); 2661 break; 2662 #endif 2663 #ifdef ENABLE_LE_CENTRAL 2664 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2665 hci_stack->le_whitelist_capacity = packet[6]; 2666 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2667 break; 2668 #endif 2669 #ifdef ENABLE_LE_PERIPHERAL 2670 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2671 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2672 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2673 break; 2674 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2675 if (hci_stack->le_advertising_set_in_current_command != 0) { 2676 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2677 hci_stack->le_advertising_set_in_current_command = 0; 2678 if (advertising_set == NULL) break; 2679 uint8_t adv_status = packet[6]; 2680 uint8_t tx_power = packet[7]; 2681 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 }; 2682 if (adv_status == 0){ 2683 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2684 } 2685 hci_emit_event(event, sizeof(event), 1); 2686 } 2687 break; 2688 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2689 if (hci_stack->le_advertising_set_in_current_command != 0) { 2690 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2691 hci_stack->le_advertising_set_in_current_command = 0; 2692 if (advertising_set == NULL) break; 2693 uint8_t adv_status = packet[5]; 2694 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2695 if (adv_status == 0){ 2696 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2697 } 2698 hci_emit_event(event, sizeof(event), 1); 2699 } 2700 break; 2701 #endif 2702 #endif 2703 case HCI_OPCODE_HCI_READ_BD_ADDR: 2704 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2705 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)); 2706 #ifdef ENABLE_CLASSIC 2707 if (hci_stack->link_key_db){ 2708 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2709 } 2710 #endif 2711 break; 2712 #ifdef ENABLE_CLASSIC 2713 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2714 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2715 break; 2716 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2717 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2718 if (status == ERROR_CODE_SUCCESS) { 2719 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2720 } else { 2721 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2722 } 2723 break; 2724 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2725 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2726 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2727 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2728 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2729 hci_emit_event(event, sizeof(event), 1); 2730 } 2731 break; 2732 #endif 2733 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2734 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2735 2736 #ifdef ENABLE_CLASSIC 2737 // determine usable ACL packet types based on host buffer size and supported features 2738 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2739 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2740 #endif 2741 // Classic/LE 2742 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2743 break; 2744 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2745 manufacturer = little_endian_read_16(packet, 10); 2746 // map Cypress to Broadcom 2747 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2748 log_info("Treat Cypress as Broadcom"); 2749 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2750 little_endian_store_16(packet, 10, manufacturer); 2751 } 2752 hci_stack->manufacturer = manufacturer; 2753 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2754 break; 2755 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2756 hci_store_local_supported_commands(packet); 2757 break; 2758 #ifdef ENABLE_CLASSIC 2759 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2760 if (packet[5]) return; 2761 hci_stack->synchronous_flow_control_enabled = 1; 2762 break; 2763 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2764 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2765 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2766 conn = hci_connection_for_handle(handle); 2767 if (conn != NULL) { 2768 uint8_t key_size = 0; 2769 if (status == 0){ 2770 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2771 log_info("Handle %04x key Size: %u", handle, key_size); 2772 } else { 2773 key_size = 1; 2774 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2775 } 2776 hci_handle_read_encryption_key_size_complete(conn, key_size); 2777 } 2778 break; 2779 // assert pairing complete event is emitted. 2780 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2781 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2782 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2783 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2784 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2785 // lookup connection by gap pairing addr 2786 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2787 if (conn == NULL) break; 2788 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2789 break; 2790 2791 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2792 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2793 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2794 uint8_t event[67]; 2795 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2796 event[1] = 65; 2797 (void)memset(&event[2], 0, 65); 2798 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2799 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2800 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2801 event[2] = 3; 2802 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2803 } else { 2804 event[2] = 1; 2805 } 2806 } 2807 hci_emit_event(event, sizeof(event), 0); 2808 break; 2809 } 2810 2811 // note: only needed if user does not provide OOB data 2812 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2813 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2814 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2815 if (conn == NULL) break; 2816 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2817 break; 2818 #endif 2819 #endif 2820 #ifdef ENABLE_BLE 2821 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2822 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2823 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2824 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2825 if (status != ERROR_CODE_SUCCESS){ 2826 hci_iso_stream_requested_finalize(0xff); 2827 } 2828 break; 2829 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2830 // lookup BIG by state 2831 btstack_linked_list_iterator_t it; 2832 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2833 while (btstack_linked_list_iterator_has_next(&it)) { 2834 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2835 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2836 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2837 if (status == ERROR_CODE_SUCCESS){ 2838 big->state_vars.next_bis++; 2839 if (big->state_vars.next_bis == big->num_bis){ 2840 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2841 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2842 } else { 2843 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2844 } 2845 } else { 2846 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2847 big->state_vars.status = status; 2848 } 2849 return; 2850 } 2851 } 2852 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2853 while (btstack_linked_list_iterator_has_next(&it)) { 2854 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2855 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2856 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2857 if (status == ERROR_CODE_SUCCESS){ 2858 big_sync->state_vars.next_bis++; 2859 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2860 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2861 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2862 } else { 2863 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2864 } 2865 } else { 2866 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2867 big_sync->state_vars.status = status; 2868 } 2869 return; 2870 } 2871 } 2872 break; 2873 } 2874 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2875 // lookup BIG by state 2876 btstack_linked_list_iterator_t it; 2877 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2878 while (btstack_linked_list_iterator_has_next(&it)) { 2879 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2880 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED){ 2881 btstack_linked_list_iterator_remove(&it); 2882 switch (big_sync->state){ 2883 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 2884 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 2885 break; 2886 default: 2887 hci_emit_big_sync_stopped(big_sync); 2888 break; 2889 } 2890 return; 2891 } 2892 } 2893 break; 2894 } 2895 #endif 2896 #endif 2897 default: 2898 break; 2899 } 2900 } 2901 2902 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 2903 UNUSED(size); 2904 2905 // get num cmd packets - limit to 1 to reduce complexity 2906 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2907 2908 // get opcode and command status 2909 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 2910 2911 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 2912 uint8_t status = hci_event_command_status_get_status(packet); 2913 #endif 2914 2915 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2916 bd_addr_type_t addr_type; 2917 #endif 2918 2919 switch (opcode){ 2920 #ifdef ENABLE_CLASSIC 2921 case HCI_OPCODE_HCI_CREATE_CONNECTION: 2922 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 2923 #endif 2924 #ifdef ENABLE_LE_CENTRAL 2925 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 2926 #endif 2927 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2928 addr_type = hci_stack->outgoing_addr_type; 2929 2930 // reset outgoing address info 2931 memset(hci_stack->outgoing_addr, 0, 6); 2932 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2933 2934 // on error 2935 if (status != ERROR_CODE_SUCCESS){ 2936 #ifdef ENABLE_LE_CENTRAL 2937 if (hci_is_le_connection_type(addr_type)){ 2938 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2939 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2940 } 2941 #endif 2942 // error => outgoing connection failed 2943 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2944 if (conn != NULL){ 2945 hci_handle_connection_failed(conn, status); 2946 } 2947 } 2948 break; 2949 #endif 2950 #ifdef ENABLE_CLASSIC 2951 case HCI_OPCODE_HCI_INQUIRY: 2952 if (status == ERROR_CODE_SUCCESS) { 2953 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2954 } else { 2955 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2956 } 2957 break; 2958 #endif 2959 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2960 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2961 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2962 if (status == ERROR_CODE_SUCCESS){ 2963 hci_iso_stream_requested_confirm(0xff); 2964 } else { 2965 hci_iso_stream_requested_finalize(0xff); 2966 } 2967 break; 2968 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 2969 default: 2970 break; 2971 } 2972 } 2973 2974 #ifdef ENABLE_BLE 2975 static void event_handle_le_connection_complete(const uint8_t * packet){ 2976 bd_addr_t addr; 2977 bd_addr_type_t addr_type; 2978 hci_connection_t * conn; 2979 2980 // Connection management 2981 reverse_bd_addr(&packet[8], addr); 2982 addr_type = (bd_addr_type_t)packet[7]; 2983 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2984 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2985 2986 #ifdef ENABLE_LE_CENTRAL 2987 // handle error: error is reported only to the initiator -> outgoing connection 2988 if (packet[3]){ 2989 2990 // handle cancelled outgoing connection 2991 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2992 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2993 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2994 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2995 // reset state 2996 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2997 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2998 // get outgoing connection conn struct for direct connect 2999 conn = gap_get_outgoing_connection(); 3000 } 3001 3002 // outgoing le connection establishment is done 3003 if (conn){ 3004 // remove entry 3005 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3006 btstack_memory_hci_connection_free( conn ); 3007 } 3008 return; 3009 } 3010 #endif 3011 3012 // on success, both hosts receive connection complete event 3013 if (packet[6] == HCI_ROLE_MASTER){ 3014 #ifdef ENABLE_LE_CENTRAL 3015 // if we're master on an le connection, it was an outgoing connection and we're done with it 3016 // note: no hci_connection_t object exists yet for connect with whitelist 3017 if (hci_is_le_connection_type(addr_type)){ 3018 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3019 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3020 } 3021 #endif 3022 } else { 3023 #ifdef ENABLE_LE_PERIPHERAL 3024 // if we're slave, it was an incoming connection, advertisements have stopped 3025 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3026 #endif 3027 } 3028 3029 // LE connections are auto-accepted, so just create a connection if there isn't one already 3030 if (!conn){ 3031 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3032 } 3033 3034 // no memory, sorry. 3035 if (!conn){ 3036 return; 3037 } 3038 3039 conn->state = OPEN; 3040 conn->role = packet[6]; 3041 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3042 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3043 3044 #ifdef ENABLE_LE_PERIPHERAL 3045 if (packet[6] == HCI_ROLE_SLAVE){ 3046 hci_update_advertisements_enabled_for_current_roles(); 3047 } 3048 #endif 3049 3050 // init unenhanced att bearer mtu 3051 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3052 conn->att_connection.mtu_exchanged = false; 3053 3054 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3055 3056 // restart timer 3057 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3058 // btstack_run_loop_add_timer(&conn->timeout); 3059 3060 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3061 3062 hci_emit_nr_connections_changed(); 3063 } 3064 #endif 3065 3066 #ifdef ENABLE_CLASSIC 3067 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){ 3068 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3069 // LEVEL_4 is tested by l2cap 3070 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3071 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3072 if (level >= LEVEL_3){ 3073 // MITM not possible without keyboard or display 3074 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3075 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3076 3077 // MITM possible if one side has keyboard and the other has keyboard or display 3078 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3079 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3080 3081 // MITM not possible if one side has only display and other side has no keyboard 3082 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3083 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3084 } 3085 // LEVEL 2 requires SSP, which is a given 3086 return true; 3087 } 3088 3089 static bool btstack_is_null(uint8_t * data, uint16_t size){ 3090 uint16_t i; 3091 for (i=0; i < size ; i++){ 3092 if (data[i] != 0) { 3093 return false; 3094 } 3095 } 3096 return true; 3097 } 3098 3099 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3100 // get requested security level 3101 gap_security_level_t requested_security_level = conn->requested_security_level; 3102 if (hci_stack->gap_secure_connections_only_mode){ 3103 requested_security_level = LEVEL_4; 3104 } 3105 3106 // assess security: LEVEL 4 requires SC 3107 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3108 if ((requested_security_level == LEVEL_4) && 3109 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3110 !hci_remote_sc_enabled(conn)){ 3111 log_info("Level 4 required, but SC not supported -> abort"); 3112 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3113 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3114 return; 3115 } 3116 3117 // assess security based on io capabilities 3118 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3119 // responder: fully validate io caps of both sides as well as OOB data 3120 bool security_possible = false; 3121 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3122 3123 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3124 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3125 // so we merge the OOB data availability 3126 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3127 if (conn->classic_oob_c_192 != NULL){ 3128 have_oob_data |= 1; 3129 } 3130 if (conn->classic_oob_c_256 != NULL){ 3131 have_oob_data |= 2; 3132 } 3133 // for up to Level 3, either P-192 as well as P-256 will do 3134 // 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 3135 // if remote does not SC, we should not receive P-256 data either 3136 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3137 security_possible = true; 3138 } 3139 // for Level 4, P-256 is needed 3140 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3141 security_possible = true; 3142 } 3143 #endif 3144 3145 if (security_possible == false){ 3146 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3147 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3148 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3149 return; 3150 } 3151 } else { 3152 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3153 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3154 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3155 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3156 log_info("Level 3+ required, but no input/output -> abort"); 3157 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3158 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3159 return; 3160 } 3161 #endif 3162 #endif 3163 } 3164 3165 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3166 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3167 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3168 } else { 3169 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3170 } 3171 #endif 3172 } 3173 3174 #endif 3175 3176 static void event_handler(uint8_t *packet, uint16_t size){ 3177 3178 uint16_t event_length = packet[1]; 3179 3180 // assert packet is complete 3181 if (size != (event_length + 2u)){ 3182 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3183 return; 3184 } 3185 3186 hci_con_handle_t handle; 3187 hci_connection_t * conn; 3188 int i; 3189 3190 #ifdef ENABLE_CLASSIC 3191 hci_link_type_t link_type; 3192 bd_addr_t addr; 3193 bd_addr_type_t addr_type; 3194 #endif 3195 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3196 hci_iso_stream_t * iso_stream; 3197 le_audio_big_t * big; 3198 le_audio_big_sync_t * big_sync; 3199 #endif 3200 3201 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3202 3203 switch (hci_event_packet_get_type(packet)) { 3204 3205 case HCI_EVENT_COMMAND_COMPLETE: 3206 handle_command_complete_event(packet, size); 3207 break; 3208 3209 case HCI_EVENT_COMMAND_STATUS: 3210 handle_command_status_event(packet, size); 3211 break; 3212 3213 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3214 if (size < 3) return; 3215 uint16_t num_handles = packet[2]; 3216 if (size != (3u + num_handles * 4u)) return; 3217 #ifdef ENABLE_CLASSIC 3218 bool notify_sco = false; 3219 #endif 3220 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3221 bool notify_iso = false; 3222 #endif 3223 uint16_t offset = 3; 3224 for (i=0; i<num_handles;i++){ 3225 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3226 offset += 2u; 3227 uint16_t num_packets = little_endian_read_16(packet, offset); 3228 offset += 2u; 3229 3230 conn = hci_connection_for_handle(handle); 3231 if (conn != NULL) { 3232 3233 if (conn->num_packets_sent >= num_packets) { 3234 conn->num_packets_sent -= num_packets; 3235 } else { 3236 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3237 conn->num_packets_sent = 0; 3238 } 3239 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3240 #ifdef ENABLE_CLASSIC 3241 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3242 notify_sco = true; 3243 } 3244 #endif 3245 } 3246 3247 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3248 hci_controller_dump_packets(); 3249 #endif 3250 3251 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3252 if (conn == NULL){ 3253 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3254 if (iso_stream != NULL){ 3255 if (iso_stream->num_packets_sent >= num_packets) { 3256 iso_stream->num_packets_sent -= num_packets; 3257 } else { 3258 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3259 iso_stream->num_packets_sent = 0; 3260 } 3261 uint8_t big_handle = iso_stream->big_handle; 3262 if (big_handle != 0xff){ 3263 le_audio_big_t * big = hci_big_for_handle(big_handle); 3264 if (big != NULL){ 3265 big->num_completed_timestamp_current_valid = true; 3266 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3267 } 3268 } 3269 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3270 num_packets, handle, iso_stream->num_packets_sent); 3271 notify_iso = true; 3272 } 3273 } 3274 #endif 3275 } 3276 3277 #ifdef ENABLE_CLASSIC 3278 if (notify_sco){ 3279 hci_notify_if_sco_can_send_now(); 3280 } 3281 #endif 3282 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3283 if (notify_iso){ 3284 hci_iso_notify_can_send_now(); 3285 } 3286 #endif 3287 break; 3288 } 3289 3290 #ifdef ENABLE_CLASSIC 3291 case HCI_EVENT_FLUSH_OCCURRED: 3292 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3293 handle = hci_event_flush_occurred_get_handle(packet); 3294 conn = hci_connection_for_handle(handle); 3295 if (conn) { 3296 log_info("Flush occurred, disconnect 0x%04x", handle); 3297 conn->state = SEND_DISCONNECT; 3298 } 3299 break; 3300 3301 case HCI_EVENT_INQUIRY_COMPLETE: 3302 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3303 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3304 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3305 hci_emit_event(event, sizeof(event), 1); 3306 } 3307 break; 3308 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3309 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3310 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3311 } 3312 break; 3313 case HCI_EVENT_CONNECTION_REQUEST: 3314 reverse_bd_addr(&packet[2], addr); 3315 link_type = (hci_link_type_t) packet[11]; 3316 3317 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3318 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3319 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3320 bd_addr_copy(hci_stack->decline_addr, addr); 3321 break; 3322 } 3323 3324 if (hci_stack->gap_classic_accept_callback != NULL){ 3325 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3326 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3327 bd_addr_copy(hci_stack->decline_addr, addr); 3328 break; 3329 } 3330 } 3331 3332 // TODO: eval COD 8-10 3333 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3334 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3335 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3336 if (!conn) { 3337 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3338 } 3339 if (!conn) { 3340 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3341 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3342 bd_addr_copy(hci_stack->decline_addr, addr); 3343 hci_run(); 3344 // avoid event to higher layer 3345 return; 3346 } 3347 conn->role = HCI_ROLE_SLAVE; 3348 conn->state = RECEIVED_CONNECTION_REQUEST; 3349 // store info about eSCO 3350 if (link_type == HCI_LINK_TYPE_ESCO){ 3351 conn->remote_supported_features[0] |= 1; 3352 } 3353 hci_run(); 3354 break; 3355 3356 case HCI_EVENT_CONNECTION_COMPLETE: 3357 // Connection management 3358 reverse_bd_addr(&packet[5], addr); 3359 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3360 addr_type = BD_ADDR_TYPE_ACL; 3361 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3362 if (conn) { 3363 if (!packet[2]){ 3364 conn->state = OPEN; 3365 conn->con_handle = little_endian_read_16(packet, 3); 3366 3367 // trigger write supervision timeout if we're master 3368 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3369 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3370 } 3371 3372 // trigger write automatic flush timeout 3373 if (hci_stack->automatic_flush_timeout != 0){ 3374 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3375 } 3376 3377 // restart timer 3378 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3379 btstack_run_loop_add_timer(&conn->timeout); 3380 3381 // trigger remote features for dedicated bonding 3382 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3383 hci_trigger_remote_features_for_connection(conn); 3384 } 3385 3386 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3387 3388 hci_emit_nr_connections_changed(); 3389 } else { 3390 // connection failed 3391 hci_handle_connection_failed(conn, packet[2]); 3392 } 3393 } 3394 break; 3395 3396 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3397 reverse_bd_addr(&packet[5], addr); 3398 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3399 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3400 if (packet[2]){ 3401 // connection failed 3402 if (conn){ 3403 hci_handle_connection_failed(conn, packet[2]); 3404 } 3405 break; 3406 } 3407 if (!conn) { 3408 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3409 } 3410 if (!conn) { 3411 break; 3412 } 3413 conn->state = OPEN; 3414 conn->con_handle = little_endian_read_16(packet, 3); 3415 3416 #ifdef ENABLE_SCO_OVER_HCI 3417 // update SCO 3418 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3419 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3420 } 3421 // trigger can send now 3422 if (hci_have_usb_transport()){ 3423 hci_stack->sco_can_send_now = true; 3424 } 3425 #endif 3426 #ifdef HAVE_SCO_TRANSPORT 3427 // configure sco transport 3428 if (hci_stack->sco_transport != NULL){ 3429 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3430 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3431 } 3432 #endif 3433 break; 3434 3435 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3436 handle = little_endian_read_16(packet, 3); 3437 conn = hci_connection_for_handle(handle); 3438 if (!conn) break; 3439 if (!packet[2]){ 3440 const uint8_t * features = &packet[5]; 3441 hci_handle_remote_features_page_0(conn, features); 3442 3443 // read extended features if possible 3444 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3445 && ((conn->remote_supported_features[0] & 2) != 0)) { 3446 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3447 break; 3448 } 3449 } 3450 hci_handle_remote_features_received(conn); 3451 break; 3452 3453 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3454 handle = little_endian_read_16(packet, 3); 3455 conn = hci_connection_for_handle(handle); 3456 if (!conn) break; 3457 // status = ok, page = 1 3458 if (!packet[2]) { 3459 uint8_t page_number = packet[5]; 3460 uint8_t maximum_page_number = packet[6]; 3461 const uint8_t * features = &packet[7]; 3462 bool done = false; 3463 switch (page_number){ 3464 case 1: 3465 hci_handle_remote_features_page_1(conn, features); 3466 if (maximum_page_number >= 2){ 3467 // get Secure Connections (Controller) from Page 2 if available 3468 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3469 } else { 3470 // otherwise, assume SC (Controller) == SC (Host) 3471 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3472 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3473 } 3474 done = true; 3475 } 3476 break; 3477 case 2: 3478 hci_handle_remote_features_page_2(conn, features); 3479 done = true; 3480 break; 3481 default: 3482 break; 3483 } 3484 if (!done) break; 3485 } 3486 hci_handle_remote_features_received(conn); 3487 break; 3488 3489 case HCI_EVENT_LINK_KEY_REQUEST: 3490 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3491 hci_event_link_key_request_get_bd_addr(packet, addr); 3492 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3493 if (!conn) break; 3494 3495 // lookup link key in db if not cached 3496 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3497 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3498 } 3499 3500 // response sent by hci_run() 3501 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3502 #endif 3503 break; 3504 3505 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3506 hci_event_link_key_request_get_bd_addr(packet, addr); 3507 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3508 if (!conn) break; 3509 3510 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3511 3512 // CVE-2020-26555: ignore NULL link key 3513 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3514 if (btstack_is_null(&packet[8], 16)) break; 3515 3516 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3517 // Change Connection Encryption keeps link key type 3518 if (link_key_type != CHANGED_COMBINATION_KEY){ 3519 conn->link_key_type = link_key_type; 3520 } 3521 3522 // cache link key. link keys stored in little-endian format for legacy reasons 3523 memcpy(&conn->link_key, &packet[8], 16); 3524 3525 // only store link key: 3526 // - if bondable enabled 3527 if (hci_stack->bondable == false) break; 3528 // - if security level sufficient 3529 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3530 // - for SSP, also check if remote side requested bonding as well 3531 if (conn->link_key_type != COMBINATION_KEY){ 3532 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3533 if (!remote_bonding){ 3534 break; 3535 } 3536 } 3537 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3538 break; 3539 } 3540 3541 case HCI_EVENT_PIN_CODE_REQUEST: 3542 hci_event_pin_code_request_get_bd_addr(packet, addr); 3543 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3544 if (!conn) break; 3545 3546 hci_pairing_started(conn, false); 3547 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3548 if (!hci_stack->bondable ){ 3549 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3550 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3551 hci_run(); 3552 return; 3553 } 3554 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3555 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3556 log_info("Level 4 required, but SC not supported -> abort"); 3557 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3558 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3559 hci_run(); 3560 return; 3561 } 3562 break; 3563 3564 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3565 hci_event_io_capability_response_get_bd_addr(packet, addr); 3566 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3567 if (!conn) break; 3568 3569 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3570 hci_pairing_started(conn, true); 3571 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3572 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3573 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3574 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3575 #endif 3576 break; 3577 3578 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3579 hci_event_io_capability_response_get_bd_addr(packet, addr); 3580 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3581 if (!conn) break; 3582 3583 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3584 hci_connection_timestamp(conn); 3585 hci_pairing_started(conn, true); 3586 break; 3587 3588 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3589 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3590 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3591 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3592 if (!conn) break; 3593 3594 hci_connection_timestamp(conn); 3595 3596 hci_pairing_started(conn, true); 3597 3598 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3599 break; 3600 #endif 3601 3602 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3603 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3604 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3605 if (!conn) break; 3606 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3607 if (hci_stack->ssp_auto_accept){ 3608 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3609 }; 3610 } else { 3611 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3612 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3613 // don't forward event to app 3614 hci_run(); 3615 return; 3616 } 3617 break; 3618 3619 case HCI_EVENT_USER_PASSKEY_REQUEST: 3620 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3621 if (hci_stack->ssp_auto_accept){ 3622 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3623 }; 3624 break; 3625 3626 case HCI_EVENT_MODE_CHANGE: 3627 handle = hci_event_mode_change_get_handle(packet); 3628 conn = hci_connection_for_handle(handle); 3629 if (!conn) break; 3630 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3631 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3632 break; 3633 #endif 3634 3635 case HCI_EVENT_ENCRYPTION_CHANGE: 3636 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3637 handle = hci_event_encryption_change_get_connection_handle(packet); 3638 conn = hci_connection_for_handle(handle); 3639 if (!conn) break; 3640 if (hci_event_encryption_change_get_status(packet) == 0u) { 3641 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3642 if (encryption_enabled){ 3643 if (hci_is_le_connection(conn)){ 3644 // For LE, we accept connection as encrypted 3645 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3646 } 3647 #ifdef ENABLE_CLASSIC 3648 else { 3649 3650 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3651 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3652 bool connected_uses_aes_ccm = encryption_enabled == 2; 3653 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3654 log_info("SC during pairing, but only E0 now -> abort"); 3655 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3656 break; 3657 } 3658 3659 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3660 if (connected_uses_aes_ccm){ 3661 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3662 } 3663 3664 #ifdef ENABLE_TESTING_SUPPORT 3665 // work around for issue with PTS dongle 3666 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3667 #endif 3668 // validate encryption key size 3669 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3670 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3671 // already got encryption key size 3672 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3673 } else { 3674 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3675 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3676 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3677 } else { 3678 // if not, pretend everything is perfect 3679 hci_handle_read_encryption_key_size_complete(conn, 16); 3680 } 3681 } 3682 } 3683 #endif 3684 } else { 3685 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3686 } 3687 } else { 3688 uint8_t status = hci_event_encryption_change_get_status(packet); 3689 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3690 conn->bonding_flags &= ~BONDING_DEDICATED; 3691 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3692 conn->bonding_status = status; 3693 } 3694 } 3695 3696 break; 3697 3698 #ifdef ENABLE_CLASSIC 3699 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3700 handle = hci_event_authentication_complete_get_connection_handle(packet); 3701 conn = hci_connection_for_handle(handle); 3702 if (!conn) break; 3703 3704 // clear authentication active flag 3705 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3706 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3707 3708 // authenticated only if auth status == 0 3709 if (hci_event_authentication_complete_get_status(packet) == 0){ 3710 // authenticated 3711 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3712 3713 // If not already encrypted, start encryption 3714 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3715 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3716 break; 3717 } 3718 } 3719 3720 // emit updated security level 3721 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3722 break; 3723 3724 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3725 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3726 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3727 if (!conn) break; 3728 3729 // treat successfully paired connection as authenticated 3730 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3731 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3732 } 3733 3734 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3735 break; 3736 #endif 3737 3738 // HCI_EVENT_DISCONNECTION_COMPLETE 3739 // has been split, to first notify stack before shutting connection down 3740 // see end of function, too. 3741 case HCI_EVENT_DISCONNECTION_COMPLETE: 3742 if (packet[2]) break; // status != 0 3743 handle = little_endian_read_16(packet, 3); 3744 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3745 if (hci_stack->acl_fragmentation_total_size > 0u) { 3746 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3747 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3748 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3749 hci_stack->acl_fragmentation_total_size = 0; 3750 hci_stack->acl_fragmentation_pos = 0; 3751 if (release_buffer){ 3752 hci_release_packet_buffer(); 3753 } 3754 } 3755 } 3756 3757 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3758 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3759 if (hci_stack->iso_fragmentation_total_size > 0u) { 3760 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3761 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3762 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3763 hci_stack->iso_fragmentation_total_size = 0; 3764 hci_stack->iso_fragmentation_pos = 0; 3765 if (release_buffer){ 3766 hci_release_packet_buffer(); 3767 } 3768 } 3769 } 3770 3771 // finalize iso stream if handle matches 3772 iso_stream = hci_iso_stream_for_con_handle(handle); 3773 if (iso_stream != NULL){ 3774 hci_iso_stream_finalize(iso_stream); 3775 break; 3776 } 3777 #endif 3778 3779 conn = hci_connection_for_handle(handle); 3780 if (!conn) break; 3781 #ifdef ENABLE_CLASSIC 3782 // pairing failed if it was ongoing 3783 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3784 #endif 3785 3786 // emit dedicatd bonding event 3787 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3788 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3789 } 3790 3791 // mark connection for shutdown, stop timers, reset state 3792 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3793 hci_connection_stop_timer(conn); 3794 hci_connection_init(conn); 3795 3796 #ifdef ENABLE_BLE 3797 #ifdef ENABLE_LE_PERIPHERAL 3798 // re-enable advertisements for le connections if active 3799 if (hci_is_le_connection(conn)){ 3800 hci_update_advertisements_enabled_for_current_roles(); 3801 } 3802 #endif 3803 #endif 3804 break; 3805 3806 case HCI_EVENT_HARDWARE_ERROR: 3807 log_error("Hardware Error: 0x%02x", packet[2]); 3808 if (hci_stack->hardware_error_callback){ 3809 (*hci_stack->hardware_error_callback)(packet[2]); 3810 } else { 3811 // if no special requests, just reboot stack 3812 hci_power_control_off(); 3813 hci_power_control_on(); 3814 } 3815 break; 3816 3817 #ifdef ENABLE_CLASSIC 3818 case HCI_EVENT_ROLE_CHANGE: 3819 if (packet[2]) break; // status != 0 3820 reverse_bd_addr(&packet[3], addr); 3821 addr_type = BD_ADDR_TYPE_ACL; 3822 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3823 if (!conn) break; 3824 conn->role = packet[9]; 3825 break; 3826 #endif 3827 3828 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3829 // release packet buffer only for asynchronous transport and if there are not further fragments 3830 if (hci_transport_synchronous()) { 3831 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3832 return; // instead of break: to avoid re-entering hci_run() 3833 } 3834 hci_stack->acl_fragmentation_tx_active = 0; 3835 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3836 hci_stack->iso_fragmentation_tx_active = 0; 3837 if (hci_stack->iso_fragmentation_total_size) break; 3838 #endif 3839 if (hci_stack->acl_fragmentation_total_size) break; 3840 hci_release_packet_buffer(); 3841 3842 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3843 hci_iso_notify_can_send_now(); 3844 #endif 3845 // L2CAP receives this event via the hci_emit_event below 3846 3847 #ifdef ENABLE_CLASSIC 3848 // For SCO, we do the can_send_now_check here 3849 hci_notify_if_sco_can_send_now(); 3850 #endif 3851 break; 3852 3853 #ifdef ENABLE_CLASSIC 3854 case HCI_EVENT_SCO_CAN_SEND_NOW: 3855 // For SCO, we do the can_send_now_check here 3856 hci_stack->sco_can_send_now = true; 3857 hci_notify_if_sco_can_send_now(); 3858 return; 3859 3860 // explode inquriy results for easier consumption 3861 case HCI_EVENT_INQUIRY_RESULT: 3862 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3863 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3864 gap_inquiry_explode(packet, size); 3865 break; 3866 #endif 3867 3868 #ifdef ENABLE_BLE 3869 case HCI_EVENT_LE_META: 3870 switch (packet[2]){ 3871 #ifdef ENABLE_LE_CENTRAL 3872 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3873 if (!hci_stack->le_scanning_enabled) break; 3874 le_handle_advertisement_report(packet, size); 3875 break; 3876 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3877 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3878 if (!hci_stack->le_scanning_enabled) break; 3879 le_handle_extended_advertisement_report(packet, size); 3880 break; 3881 #endif 3882 #endif 3883 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3884 event_handle_le_connection_complete(packet); 3885 break; 3886 3887 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3888 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3889 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3890 conn = hci_connection_for_handle(handle); 3891 if (!conn) break; 3892 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3893 break; 3894 3895 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3896 // connection 3897 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3898 conn = hci_connection_for_handle(handle); 3899 if (conn) { 3900 // read arguments 3901 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3902 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3903 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3904 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3905 3906 // validate against current connection parameter range 3907 le_connection_parameter_range_t existing_range; 3908 gap_get_connection_parameter_range(&existing_range); 3909 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3910 if (update_parameter){ 3911 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3912 conn->le_conn_interval_min = le_conn_interval_min; 3913 conn->le_conn_interval_max = le_conn_interval_max; 3914 conn->le_conn_latency = le_conn_latency; 3915 conn->le_supervision_timeout = le_supervision_timeout; 3916 } else { 3917 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3918 } 3919 } 3920 break; 3921 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3922 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3923 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3924 conn = hci_connection_for_handle(handle); 3925 if (conn) { 3926 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3927 } 3928 break; 3929 #endif 3930 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3931 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3932 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3933 iso_stream = hci_iso_stream_for_con_handle(handle); 3934 if (iso_stream){ 3935 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3936 if (status == ERROR_CODE_SUCCESS){ 3937 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3938 } else { 3939 hci_iso_stream_finalize(iso_stream); 3940 } 3941 } 3942 break; 3943 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 3944 big = hci_big_for_handle(packet[4]); 3945 if (big != NULL){ 3946 uint8_t status = packet[3]; 3947 if (status == ERROR_CODE_SUCCESS){ 3948 // store bis_con_handles and trigger iso path setup 3949 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 3950 uint8_t i; 3951 for (i=0;i<num_bis;i++){ 3952 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 3953 big->bis_con_handles[i] = bis_handle; 3954 // assign bis handle 3955 btstack_linked_list_iterator_t it; 3956 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3957 while (btstack_linked_list_iterator_has_next(&it)){ 3958 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3959 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 3960 (iso_stream->big_handle == big->big_handle)){ 3961 iso_stream->con_handle = bis_handle; 3962 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3963 break; 3964 } 3965 } 3966 } 3967 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 3968 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 3969 big->state_vars.next_bis = 0; 3970 } 3971 } else { 3972 // create BIG failed or has been stopped by us 3973 hci_iso_stream_requested_finalize(big->big_handle); 3974 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3975 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 3976 hci_emit_big_created(big, status); 3977 } else { 3978 hci_emit_big_terminated(big); 3979 } 3980 } 3981 } 3982 break; 3983 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 3984 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 3985 if (big != NULL){ 3986 // finalize associated ISO streams 3987 btstack_linked_list_iterator_t it; 3988 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3989 while (btstack_linked_list_iterator_has_next(&it)){ 3990 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3991 if (iso_stream->big_handle == big->big_handle){ 3992 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->big_handle, iso_stream->con_handle); 3993 btstack_linked_list_iterator_remove(&it); 3994 btstack_memory_hci_iso_stream_free(iso_stream); 3995 } 3996 } 3997 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3998 switch (big->state){ 3999 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4000 hci_emit_big_created(big, big->state_vars.status); 4001 break; 4002 default: 4003 hci_emit_big_terminated(big); 4004 break; 4005 } 4006 } 4007 break; 4008 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4009 big_sync = hci_big_sync_for_handle(packet[4]); 4010 if (big_sync != NULL){ 4011 uint8_t status = packet[3]; 4012 if (status == ERROR_CODE_SUCCESS){ 4013 // store bis_con_handles and trigger iso path setup 4014 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4015 uint8_t i; 4016 for (i=0;i<num_bis;i++){ 4017 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4018 } 4019 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4020 // trigger iso path setup 4021 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4022 big_sync->state_vars.next_bis = 0; 4023 } 4024 } else { 4025 // create BIG Sync failed or has been stopped by us 4026 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4027 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4028 hci_emit_big_sync_created(big_sync, status); 4029 } else { 4030 hci_emit_big_sync_stopped(big_sync); 4031 } 4032 } 4033 } 4034 break; 4035 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4036 big_sync = hci_big_sync_for_handle(packet[4]); 4037 if (big_sync != NULL){ 4038 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4039 hci_emit_big_sync_stopped(big_sync); 4040 } 4041 break; 4042 #endif 4043 default: 4044 break; 4045 } 4046 break; 4047 #endif 4048 case HCI_EVENT_VENDOR_SPECIFIC: 4049 // Vendor specific commands often create vendor specific event instead of num completed packets 4050 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4051 switch (hci_stack->manufacturer){ 4052 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4053 hci_stack->num_cmd_packets = 1; 4054 break; 4055 default: 4056 break; 4057 } 4058 break; 4059 default: 4060 break; 4061 } 4062 4063 handle_event_for_current_stack_state(packet, size); 4064 4065 // notify upper stack 4066 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4067 4068 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4069 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4070 handle = little_endian_read_16(packet, 3); 4071 hci_connection_t * aConn = hci_connection_for_handle(handle); 4072 // discard connection if app did not trigger a reconnect in the event handler 4073 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4074 hci_shutdown_connection(aConn); 4075 } 4076 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4077 hci_controller_dump_packets(); 4078 #endif 4079 } 4080 4081 // execute main loop 4082 hci_run(); 4083 } 4084 4085 #ifdef ENABLE_CLASSIC 4086 4087 #ifdef ENABLE_SCO_OVER_HCI 4088 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4089 static void sco_schedule_tx(hci_connection_t * conn); 4090 4091 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4092 log_debug("SCO TX Timeout"); 4093 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4094 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4095 if (!conn) return; 4096 4097 // trigger send 4098 conn->sco_tx_ready = 1; 4099 // extra packet if CVSD but SCO buffer is too short 4100 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4101 conn->sco_tx_ready++; 4102 } 4103 hci_notify_if_sco_can_send_now(); 4104 } 4105 4106 4107 #define SCO_TX_AFTER_RX_MS (6) 4108 4109 static void sco_schedule_tx(hci_connection_t * conn){ 4110 4111 uint32_t now = btstack_run_loop_get_time_ms(); 4112 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4113 int time_delta_ms = sco_tx_ms - now; 4114 4115 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4116 4117 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4118 btstack_run_loop_remove_timer(timer); 4119 btstack_run_loop_set_timer(timer, time_delta_ms); 4120 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4121 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4122 btstack_run_loop_add_timer(timer); 4123 } 4124 #endif 4125 4126 static void sco_handler(uint8_t * packet, uint16_t size){ 4127 // lookup connection struct 4128 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4129 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4130 if (!conn) return; 4131 4132 #ifdef ENABLE_SCO_OVER_HCI 4133 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4134 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4135 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4136 packet[2] = 0x3c; 4137 memmove(&packet[3], &packet[23], 63); 4138 size = 63; 4139 } 4140 } 4141 4142 if (hci_have_usb_transport()){ 4143 // Nothing to do 4144 } else { 4145 // 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); 4146 if (hci_stack->synchronous_flow_control_enabled == 0){ 4147 uint32_t now = btstack_run_loop_get_time_ms(); 4148 4149 if (!conn->sco_rx_valid){ 4150 // ignore first 10 packets 4151 conn->sco_rx_count++; 4152 // log_debug("sco rx count %u", conn->sco_rx_count); 4153 if (conn->sco_rx_count == 10) { 4154 // use first timestamp as is and pretent it just started 4155 conn->sco_rx_ms = now; 4156 conn->sco_rx_valid = 1; 4157 conn->sco_rx_count = 0; 4158 sco_schedule_tx(conn); 4159 } 4160 } else { 4161 // track expected arrival timme 4162 conn->sco_rx_count++; 4163 conn->sco_rx_ms += 7; 4164 int delta = (int32_t) (now - conn->sco_rx_ms); 4165 if (delta > 0){ 4166 conn->sco_rx_ms++; 4167 } 4168 // log_debug("sco rx %u", conn->sco_rx_ms); 4169 sco_schedule_tx(conn); 4170 } 4171 } 4172 } 4173 #endif 4174 4175 // deliver to app 4176 if (hci_stack->sco_packet_handler) { 4177 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4178 } 4179 4180 #ifdef HAVE_SCO_TRANSPORT 4181 // We can send one packet for each received packet 4182 conn->sco_tx_ready++; 4183 hci_notify_if_sco_can_send_now(); 4184 #endif 4185 4186 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4187 conn->num_packets_completed++; 4188 hci_stack->host_completed_packets = 1; 4189 hci_run(); 4190 #endif 4191 } 4192 #endif 4193 4194 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4195 hci_dump_packet(packet_type, 1, packet, size); 4196 switch (packet_type) { 4197 case HCI_EVENT_PACKET: 4198 event_handler(packet, size); 4199 break; 4200 case HCI_ACL_DATA_PACKET: 4201 acl_handler(packet, size); 4202 break; 4203 #ifdef ENABLE_CLASSIC 4204 case HCI_SCO_DATA_PACKET: 4205 sco_handler(packet, size); 4206 break; 4207 #endif 4208 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4209 case HCI_ISO_DATA_PACKET: 4210 hci_iso_packet_handler(packet, size); 4211 break; 4212 #endif 4213 default: 4214 break; 4215 } 4216 } 4217 4218 /** 4219 * @brief Add event packet handler. 4220 */ 4221 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4222 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4223 } 4224 4225 /** 4226 * @brief Remove event packet handler. 4227 */ 4228 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4229 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4230 } 4231 4232 /** Register HCI packet handlers */ 4233 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4234 hci_stack->acl_packet_handler = handler; 4235 } 4236 4237 #ifdef ENABLE_CLASSIC 4238 /** 4239 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4240 */ 4241 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4242 hci_stack->sco_packet_handler = handler; 4243 } 4244 #endif 4245 4246 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4247 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4248 hci_stack->iso_packet_handler = handler; 4249 } 4250 #endif 4251 4252 static void hci_state_reset(void){ 4253 // no connections yet 4254 hci_stack->connections = NULL; 4255 4256 // keep discoverable/connectable as this has been requested by the client(s) 4257 // hci_stack->discoverable = 0; 4258 // hci_stack->connectable = 0; 4259 // hci_stack->bondable = 1; 4260 // hci_stack->own_addr_type = 0; 4261 4262 // buffer is free 4263 hci_stack->hci_packet_buffer_reserved = false; 4264 4265 // no pending cmds 4266 hci_stack->decline_reason = 0; 4267 4268 hci_stack->secure_connections_active = false; 4269 4270 #ifdef ENABLE_CLASSIC 4271 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4272 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4273 4274 hci_stack->gap_tasks_classic = 4275 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4276 GAP_TASK_SET_CLASS_OF_DEVICE | 4277 GAP_TASK_SET_LOCAL_NAME | 4278 GAP_TASK_SET_EIR_DATA | 4279 GAP_TASK_WRITE_SCAN_ENABLE | 4280 GAP_TASK_WRITE_PAGE_TIMEOUT; 4281 #endif 4282 4283 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4284 hci_stack->classic_read_local_oob_data = false; 4285 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4286 #endif 4287 4288 // LE 4289 #ifdef ENABLE_BLE 4290 memset(hci_stack->le_random_address, 0, 6); 4291 hci_stack->le_random_address_set = 0; 4292 #endif 4293 #ifdef ENABLE_LE_CENTRAL 4294 hci_stack->le_scanning_active = false; 4295 hci_stack->le_scanning_param_update = true; 4296 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4297 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4298 hci_stack->le_whitelist_capacity = 0; 4299 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4300 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4301 #endif 4302 #endif 4303 #ifdef ENABLE_LE_PERIPHERAL 4304 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4305 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4306 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4307 } 4308 if (hci_stack->le_advertisements_data != NULL){ 4309 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4310 } 4311 #endif 4312 } 4313 4314 #ifdef ENABLE_CLASSIC 4315 /** 4316 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4317 */ 4318 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4319 // store and open remote device db 4320 hci_stack->link_key_db = link_key_db; 4321 if (hci_stack->link_key_db) { 4322 hci_stack->link_key_db->open(); 4323 } 4324 } 4325 #endif 4326 4327 void hci_init(const hci_transport_t *transport, const void *config){ 4328 4329 #ifdef HAVE_MALLOC 4330 if (!hci_stack) { 4331 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4332 } 4333 #else 4334 hci_stack = &hci_stack_static; 4335 #endif 4336 memset(hci_stack, 0, sizeof(hci_stack_t)); 4337 4338 // reference to use transport layer implementation 4339 hci_stack->hci_transport = transport; 4340 4341 // reference to used config 4342 hci_stack->config = config; 4343 4344 // setup pointer for outgoing packet buffer 4345 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4346 4347 // max acl payload size defined in config.h 4348 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4349 4350 // register packet handlers with transport 4351 transport->register_packet_handler(&packet_handler); 4352 4353 hci_stack->state = HCI_STATE_OFF; 4354 4355 // class of device 4356 hci_stack->class_of_device = 0x007a020c; // Smartphone 4357 4358 // bondable by default 4359 hci_stack->bondable = 1; 4360 4361 #ifdef ENABLE_CLASSIC 4362 // classic name 4363 hci_stack->local_name = default_classic_name; 4364 4365 // Master slave policy 4366 hci_stack->master_slave_policy = 1; 4367 4368 // Allow Role Switch 4369 hci_stack->allow_role_switch = 1; 4370 4371 // Default / minimum security level = 2 4372 hci_stack->gap_security_level = LEVEL_2; 4373 4374 // Default Security Mode 4 4375 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4376 4377 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4378 hci_stack->gap_required_encyrption_key_size = 7; 4379 4380 // Link Supervision Timeout 4381 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4382 4383 #endif 4384 4385 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4386 hci_stack->ssp_enable = 1; 4387 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4388 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4389 hci_stack->ssp_auto_accept = 1; 4390 4391 // Secure Connections: enable (requires support from Controller) 4392 hci_stack->secure_connections_enable = true; 4393 4394 // voice setting - signed 16 bit pcm data with CVSD over the air 4395 hci_stack->sco_voice_setting = 0x60; 4396 4397 #ifdef ENABLE_LE_CENTRAL 4398 // connection parameter to use for outgoing connections 4399 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4400 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4401 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4402 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4403 hci_stack->le_connection_latency = 4; // 4 4404 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4405 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4406 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4407 4408 // default LE Scanning 4409 hci_stack->le_scan_type = 0x1; // active 4410 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4411 hci_stack->le_scan_window = 0x30; // 30 ms 4412 #endif 4413 4414 #ifdef ENABLE_LE_PERIPHERAL 4415 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4416 #endif 4417 4418 // connection parameter range used to answer connection parameter update requests in l2cap 4419 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4420 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4421 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4422 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4423 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4424 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4425 4426 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4427 hci_stack->iso_packets_to_queue = 1; 4428 #endif 4429 4430 hci_state_reset(); 4431 } 4432 4433 void hci_deinit(void){ 4434 btstack_run_loop_remove_timer(&hci_stack->timeout); 4435 #ifdef HAVE_MALLOC 4436 if (hci_stack) { 4437 free(hci_stack); 4438 } 4439 #endif 4440 hci_stack = NULL; 4441 4442 #ifdef ENABLE_CLASSIC 4443 disable_l2cap_timeouts = 0; 4444 #endif 4445 } 4446 4447 /** 4448 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4449 */ 4450 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4451 hci_stack->chipset = chipset_driver; 4452 4453 // reset chipset driver - init is also called on power_up 4454 if (hci_stack->chipset && hci_stack->chipset->init){ 4455 hci_stack->chipset->init(hci_stack->config); 4456 } 4457 } 4458 4459 /** 4460 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4461 */ 4462 void hci_set_control(const btstack_control_t *hardware_control){ 4463 // references to used control implementation 4464 hci_stack->control = hardware_control; 4465 // init with transport config 4466 hardware_control->init(hci_stack->config); 4467 } 4468 4469 static void hci_discard_connections(void){ 4470 btstack_linked_list_iterator_t it; 4471 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4472 while (btstack_linked_list_iterator_has_next(&it)){ 4473 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4474 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4475 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4476 hci_shutdown_connection(connection); 4477 } 4478 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4479 while (hci_stack->iso_streams != NULL){ 4480 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4481 } 4482 #endif 4483 } 4484 4485 void hci_close(void){ 4486 4487 #ifdef ENABLE_CLASSIC 4488 // close remote device db 4489 if (hci_stack->link_key_db) { 4490 hci_stack->link_key_db->close(); 4491 } 4492 #endif 4493 4494 hci_discard_connections(); 4495 4496 hci_power_control(HCI_POWER_OFF); 4497 4498 #ifdef HAVE_MALLOC 4499 free(hci_stack); 4500 #endif 4501 hci_stack = NULL; 4502 } 4503 4504 #ifdef HAVE_SCO_TRANSPORT 4505 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4506 hci_stack->sco_transport = sco_transport; 4507 sco_transport->register_packet_handler(&packet_handler); 4508 } 4509 #endif 4510 4511 #ifdef ENABLE_CLASSIC 4512 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4513 // validate ranage and set 4514 if (encryption_key_size < 7) return; 4515 if (encryption_key_size > 16) return; 4516 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4517 } 4518 4519 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4520 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4521 hci_stack->gap_security_mode = security_mode; 4522 return ERROR_CODE_SUCCESS; 4523 } else { 4524 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4525 } 4526 } 4527 4528 gap_security_mode_t gap_get_security_mode(void){ 4529 return hci_stack->gap_security_mode; 4530 } 4531 4532 void gap_set_security_level(gap_security_level_t security_level){ 4533 hci_stack->gap_security_level = security_level; 4534 } 4535 4536 gap_security_level_t gap_get_security_level(void){ 4537 if (hci_stack->gap_secure_connections_only_mode){ 4538 return LEVEL_4; 4539 } 4540 return hci_stack->gap_security_level; 4541 } 4542 4543 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4544 hci_stack->gap_minimal_service_security_level = security_level; 4545 } 4546 4547 void gap_set_secure_connections_only_mode(bool enable){ 4548 hci_stack->gap_secure_connections_only_mode = enable; 4549 } 4550 4551 bool gap_get_secure_connections_only_mode(void){ 4552 return hci_stack->gap_secure_connections_only_mode; 4553 } 4554 #endif 4555 4556 #ifdef ENABLE_CLASSIC 4557 void gap_set_class_of_device(uint32_t class_of_device){ 4558 hci_stack->class_of_device = class_of_device; 4559 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4560 hci_run(); 4561 } 4562 4563 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4564 hci_stack->default_link_policy_settings = default_link_policy_settings; 4565 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4566 hci_run(); 4567 } 4568 4569 void gap_set_allow_role_switch(bool allow_role_switch){ 4570 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4571 } 4572 4573 uint8_t hci_get_allow_role_switch(void){ 4574 return hci_stack->allow_role_switch; 4575 } 4576 4577 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4578 hci_stack->link_supervision_timeout = link_supervision_timeout; 4579 } 4580 4581 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4582 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4583 } 4584 4585 uint16_t hci_automatic_flush_timeout(void){ 4586 return hci_stack->automatic_flush_timeout; 4587 } 4588 4589 void hci_disable_l2cap_timeout_check(void){ 4590 disable_l2cap_timeouts = 1; 4591 } 4592 #endif 4593 4594 #ifndef HAVE_HOST_CONTROLLER_API 4595 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4596 void hci_set_bd_addr(bd_addr_t addr){ 4597 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4598 hci_stack->custom_bd_addr_set = 1; 4599 } 4600 #endif 4601 4602 // State-Module-Driver overview 4603 // state module low-level 4604 // HCI_STATE_OFF off close 4605 // HCI_STATE_INITIALIZING, on open 4606 // HCI_STATE_WORKING, on open 4607 // HCI_STATE_HALTING, on open 4608 // HCI_STATE_SLEEPING, off/sleep close 4609 // HCI_STATE_FALLING_ASLEEP on open 4610 4611 static int hci_power_control_on(void){ 4612 4613 // power on 4614 int err = 0; 4615 if (hci_stack->control && hci_stack->control->on){ 4616 err = (*hci_stack->control->on)(); 4617 } 4618 if (err){ 4619 log_error( "POWER_ON failed"); 4620 hci_emit_hci_open_failed(); 4621 return err; 4622 } 4623 4624 // int chipset driver 4625 if (hci_stack->chipset && hci_stack->chipset->init){ 4626 hci_stack->chipset->init(hci_stack->config); 4627 } 4628 4629 // init transport 4630 if (hci_stack->hci_transport->init){ 4631 hci_stack->hci_transport->init(hci_stack->config); 4632 } 4633 4634 // open transport 4635 err = hci_stack->hci_transport->open(); 4636 if (err){ 4637 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4638 if (hci_stack->control && hci_stack->control->off){ 4639 (*hci_stack->control->off)(); 4640 } 4641 hci_emit_hci_open_failed(); 4642 return err; 4643 } 4644 return 0; 4645 } 4646 4647 static void hci_power_control_off(void){ 4648 4649 log_info("hci_power_control_off"); 4650 4651 // close low-level device 4652 hci_stack->hci_transport->close(); 4653 4654 log_info("hci_power_control_off - hci_transport closed"); 4655 4656 // power off 4657 if (hci_stack->control && hci_stack->control->off){ 4658 (*hci_stack->control->off)(); 4659 } 4660 4661 log_info("hci_power_control_off - control closed"); 4662 4663 hci_stack->state = HCI_STATE_OFF; 4664 } 4665 4666 static void hci_power_control_sleep(void){ 4667 4668 log_info("hci_power_control_sleep"); 4669 4670 #if 0 4671 // don't close serial port during sleep 4672 4673 // close low-level device 4674 hci_stack->hci_transport->close(hci_stack->config); 4675 #endif 4676 4677 // sleep mode 4678 if (hci_stack->control && hci_stack->control->sleep){ 4679 (*hci_stack->control->sleep)(); 4680 } 4681 4682 hci_stack->state = HCI_STATE_SLEEPING; 4683 } 4684 4685 static int hci_power_control_wake(void){ 4686 4687 log_info("hci_power_control_wake"); 4688 4689 // wake on 4690 if (hci_stack->control && hci_stack->control->wake){ 4691 (*hci_stack->control->wake)(); 4692 } 4693 4694 #if 0 4695 // open low-level device 4696 int err = hci_stack->hci_transport->open(hci_stack->config); 4697 if (err){ 4698 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4699 if (hci_stack->control && hci_stack->control->off){ 4700 (*hci_stack->control->off)(); 4701 } 4702 hci_emit_hci_open_failed(); 4703 return err; 4704 } 4705 #endif 4706 4707 return 0; 4708 } 4709 4710 static void hci_power_enter_initializing_state(void){ 4711 // set up state machine 4712 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4713 hci_stack->hci_packet_buffer_reserved = false; 4714 hci_stack->state = HCI_STATE_INITIALIZING; 4715 hci_stack->substate = HCI_INIT_SEND_RESET; 4716 } 4717 4718 static void hci_power_enter_halting_state(void){ 4719 #ifdef ENABLE_BLE 4720 hci_whitelist_free(); 4721 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4722 hci_periodic_advertiser_list_free(); 4723 #endif 4724 #endif 4725 // see hci_run 4726 hci_stack->state = HCI_STATE_HALTING; 4727 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4728 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4729 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4730 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4731 btstack_run_loop_add_timer(&hci_stack->timeout); 4732 } 4733 4734 // returns error 4735 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4736 int err; 4737 switch (power_mode){ 4738 case HCI_POWER_ON: 4739 err = hci_power_control_on(); 4740 if (err != 0) { 4741 log_error("hci_power_control_on() error %d", err); 4742 return err; 4743 } 4744 hci_power_enter_initializing_state(); 4745 break; 4746 case HCI_POWER_OFF: 4747 // do nothing 4748 break; 4749 case HCI_POWER_SLEEP: 4750 // do nothing (with SLEEP == OFF) 4751 break; 4752 default: 4753 btstack_assert(false); 4754 break; 4755 } 4756 return ERROR_CODE_SUCCESS; 4757 } 4758 4759 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4760 switch (power_mode){ 4761 case HCI_POWER_ON: 4762 // do nothing 4763 break; 4764 case HCI_POWER_OFF: 4765 // no connections yet, just turn it off 4766 hci_power_control_off(); 4767 break; 4768 case HCI_POWER_SLEEP: 4769 // no connections yet, just turn it off 4770 hci_power_control_sleep(); 4771 break; 4772 default: 4773 btstack_assert(false); 4774 break; 4775 } 4776 return ERROR_CODE_SUCCESS; 4777 } 4778 4779 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4780 switch (power_mode){ 4781 case HCI_POWER_ON: 4782 // do nothing 4783 break; 4784 case HCI_POWER_OFF: 4785 hci_power_enter_halting_state(); 4786 break; 4787 case HCI_POWER_SLEEP: 4788 // see hci_run 4789 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4790 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4791 break; 4792 default: 4793 btstack_assert(false); 4794 break; 4795 } 4796 return ERROR_CODE_SUCCESS; 4797 } 4798 4799 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4800 switch (power_mode){ 4801 case HCI_POWER_ON: 4802 hci_power_enter_initializing_state(); 4803 break; 4804 case HCI_POWER_OFF: 4805 // do nothing 4806 break; 4807 case HCI_POWER_SLEEP: 4808 // see hci_run 4809 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4810 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4811 break; 4812 default: 4813 btstack_assert(false); 4814 break; 4815 } 4816 return ERROR_CODE_SUCCESS; 4817 } 4818 4819 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4820 switch (power_mode){ 4821 case HCI_POWER_ON: 4822 hci_power_enter_initializing_state(); 4823 break; 4824 case HCI_POWER_OFF: 4825 hci_power_enter_halting_state(); 4826 break; 4827 case HCI_POWER_SLEEP: 4828 // do nothing 4829 break; 4830 default: 4831 btstack_assert(false); 4832 break; 4833 } 4834 return ERROR_CODE_SUCCESS; 4835 } 4836 4837 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4838 int err; 4839 switch (power_mode){ 4840 case HCI_POWER_ON: 4841 err = hci_power_control_wake(); 4842 if (err) return err; 4843 hci_power_enter_initializing_state(); 4844 break; 4845 case HCI_POWER_OFF: 4846 hci_power_enter_halting_state(); 4847 break; 4848 case HCI_POWER_SLEEP: 4849 // do nothing 4850 break; 4851 default: 4852 btstack_assert(false); 4853 break; 4854 } 4855 return ERROR_CODE_SUCCESS; 4856 } 4857 4858 int hci_power_control(HCI_POWER_MODE power_mode){ 4859 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4860 int err = 0; 4861 switch (hci_stack->state){ 4862 case HCI_STATE_OFF: 4863 err = hci_power_control_state_off(power_mode); 4864 break; 4865 case HCI_STATE_INITIALIZING: 4866 err = hci_power_control_state_initializing(power_mode); 4867 break; 4868 case HCI_STATE_WORKING: 4869 err = hci_power_control_state_working(power_mode); 4870 break; 4871 case HCI_STATE_HALTING: 4872 err = hci_power_control_state_halting(power_mode); 4873 break; 4874 case HCI_STATE_FALLING_ASLEEP: 4875 err = hci_power_control_state_falling_asleep(power_mode); 4876 break; 4877 case HCI_STATE_SLEEPING: 4878 err = hci_power_control_state_sleeping(power_mode); 4879 break; 4880 default: 4881 btstack_assert(false); 4882 break; 4883 } 4884 if (err != 0){ 4885 return err; 4886 } 4887 4888 // create internal event 4889 hci_emit_state(); 4890 4891 // trigger next/first action 4892 hci_run(); 4893 4894 return 0; 4895 } 4896 4897 4898 static void hci_halting_run(void) { 4899 4900 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4901 4902 hci_connection_t *connection; 4903 #ifdef ENABLE_BLE 4904 #ifdef ENABLE_LE_PERIPHERAL 4905 bool stop_advertismenets; 4906 #endif 4907 #endif 4908 4909 switch (hci_stack->substate) { 4910 case HCI_HALTING_CLASSIC_STOP: 4911 #ifdef ENABLE_CLASSIC 4912 if (!hci_can_send_command_packet_now()) return; 4913 4914 if (hci_stack->connectable || hci_stack->discoverable){ 4915 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4916 hci_send_cmd(&hci_write_scan_enable, 0); 4917 return; 4918 } 4919 #endif 4920 /* fall through */ 4921 4922 case HCI_HALTING_LE_ADV_STOP: 4923 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4924 4925 #ifdef ENABLE_BLE 4926 #ifdef ENABLE_LE_PERIPHERAL 4927 if (!hci_can_send_command_packet_now()) return; 4928 4929 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4930 4931 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4932 if (hci_extended_advertising_supported()){ 4933 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4934 btstack_linked_list_iterator_t it; 4935 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4936 // stop all periodic advertisements and check if an extended set is active 4937 while (btstack_linked_list_iterator_has_next(&it)){ 4938 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4939 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4940 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4941 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4942 return; 4943 } 4944 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4945 stop_advertismenets = true; 4946 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4947 } 4948 } 4949 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4950 if (stop_advertismenets){ 4951 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4952 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4953 return; 4954 } 4955 } 4956 else 4957 #else /* ENABLE_LE_PERIPHERAL */ 4958 { 4959 if (stop_advertismenets) { 4960 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4961 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4962 return; 4963 } 4964 } 4965 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4966 #endif /* ENABLE_LE_PERIPHERAL */ 4967 #endif /* ENABLE_BLE */ 4968 4969 /* fall through */ 4970 4971 case HCI_HALTING_LE_SCAN_STOP: 4972 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4973 if (!hci_can_send_command_packet_now()) return; 4974 4975 #ifdef ENABLE_BLE 4976 #ifdef ENABLE_LE_CENTRAL 4977 if (hci_stack->le_scanning_active){ 4978 hci_le_scan_stop(); 4979 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4980 return; 4981 } 4982 #endif 4983 #endif 4984 4985 /* fall through */ 4986 4987 case HCI_HALTING_DISCONNECT_ALL: 4988 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4989 if (!hci_can_send_command_packet_now()) return; 4990 4991 // close all open connections 4992 connection = (hci_connection_t *) hci_stack->connections; 4993 if (connection) { 4994 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4995 4996 // check state 4997 if (connection->state == SENT_DISCONNECT) return; 4998 connection->state = SENT_DISCONNECT; 4999 5000 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5001 5002 // finally, send the disconnect command 5003 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5004 return; 5005 } 5006 5007 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5008 // stop BIGs and BIG Syncs 5009 if (hci_stack->le_audio_bigs != NULL){ 5010 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5011 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5012 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5013 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5014 return; 5015 } 5016 if (hci_stack->le_audio_big_syncs != NULL){ 5017 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5018 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5019 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5020 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5021 return; 5022 } 5023 #endif 5024 5025 btstack_run_loop_remove_timer(&hci_stack->timeout); 5026 5027 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5028 log_info("HCI_STATE_HALTING: wait 50 ms"); 5029 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5030 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5031 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5032 btstack_run_loop_add_timer(&hci_stack->timeout); 5033 break; 5034 5035 case HCI_HALTING_CLOSE: 5036 // close left over connections (that had not been properly closed before) 5037 hci_discard_connections(); 5038 5039 log_info("HCI_STATE_HALTING, calling off"); 5040 5041 // switch mode 5042 hci_power_control_off(); 5043 5044 log_info("HCI_STATE_HALTING, emitting state"); 5045 hci_emit_state(); 5046 log_info("HCI_STATE_HALTING, done"); 5047 break; 5048 5049 case HCI_HALTING_W4_CLOSE_TIMER: 5050 // keep waiting 5051 5052 break; 5053 default: 5054 break; 5055 } 5056 }; 5057 5058 static void hci_falling_asleep_run(void){ 5059 hci_connection_t * connection; 5060 switch(hci_stack->substate) { 5061 case HCI_FALLING_ASLEEP_DISCONNECT: 5062 log_info("HCI_STATE_FALLING_ASLEEP"); 5063 // close all open connections 5064 connection = (hci_connection_t *) hci_stack->connections; 5065 if (connection){ 5066 5067 // send disconnect 5068 if (!hci_can_send_command_packet_now()) return; 5069 5070 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5071 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5072 5073 // send disconnected event right away - causes higher layer connections to get closed, too. 5074 hci_shutdown_connection(connection); 5075 return; 5076 } 5077 5078 if (hci_classic_supported()){ 5079 // disable page and inquiry scan 5080 if (!hci_can_send_command_packet_now()) return; 5081 5082 log_info("HCI_STATE_HALTING, disabling inq scans"); 5083 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5084 5085 // continue in next sub state 5086 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5087 break; 5088 } 5089 5090 /* fall through */ 5091 5092 case HCI_FALLING_ASLEEP_COMPLETE: 5093 log_info("HCI_STATE_HALTING, calling sleep"); 5094 // switch mode 5095 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5096 hci_emit_state(); 5097 break; 5098 5099 default: 5100 break; 5101 } 5102 } 5103 5104 #ifdef ENABLE_CLASSIC 5105 5106 static void hci_update_scan_enable(void){ 5107 // 2 = page scan, 1 = inq scan 5108 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5109 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5110 hci_run(); 5111 } 5112 5113 void gap_discoverable_control(uint8_t enable){ 5114 if (enable) enable = 1; // normalize argument 5115 5116 if (hci_stack->discoverable == enable){ 5117 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5118 return; 5119 } 5120 5121 hci_stack->discoverable = enable; 5122 hci_update_scan_enable(); 5123 } 5124 5125 void gap_connectable_control(uint8_t enable){ 5126 if (enable) enable = 1; // normalize argument 5127 5128 // don't emit event 5129 if (hci_stack->connectable == enable) return; 5130 5131 hci_stack->connectable = enable; 5132 hci_update_scan_enable(); 5133 } 5134 #endif 5135 5136 void gap_local_bd_addr(bd_addr_t address_buffer){ 5137 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5138 } 5139 5140 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5141 static void hci_host_num_completed_packets(void){ 5142 5143 // create packet manually as arrays are not supported and num_commands should not get reduced 5144 hci_reserve_packet_buffer(); 5145 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5146 5147 uint16_t size = 0; 5148 uint16_t num_handles = 0; 5149 packet[size++] = 0x35; 5150 packet[size++] = 0x0c; 5151 size++; // skip param len 5152 size++; // skip num handles 5153 5154 // add { handle, packets } entries 5155 btstack_linked_item_t * it; 5156 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5157 hci_connection_t * connection = (hci_connection_t *) it; 5158 if (connection->num_packets_completed){ 5159 little_endian_store_16(packet, size, connection->con_handle); 5160 size += 2; 5161 little_endian_store_16(packet, size, connection->num_packets_completed); 5162 size += 2; 5163 // 5164 num_handles++; 5165 connection->num_packets_completed = 0; 5166 } 5167 } 5168 5169 packet[2] = size - 3; 5170 packet[3] = num_handles; 5171 5172 hci_stack->host_completed_packets = 0; 5173 5174 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5175 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5176 5177 // release packet buffer for synchronous transport implementations 5178 if (hci_transport_synchronous()){ 5179 hci_release_packet_buffer(); 5180 hci_emit_transport_packet_sent(); 5181 } 5182 } 5183 #endif 5184 5185 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5186 UNUSED(ds); 5187 hci_stack->substate = HCI_HALTING_CLOSE; 5188 // allow packet handlers to defer final shutdown 5189 hci_emit_state(); 5190 hci_run(); 5191 } 5192 5193 static bool hci_run_acl_fragments(void){ 5194 if (hci_stack->acl_fragmentation_total_size > 0u) { 5195 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5196 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5197 if (connection) { 5198 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5199 hci_send_acl_packet_fragments(connection); 5200 return true; 5201 } 5202 } else { 5203 // connection gone -> discard further fragments 5204 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5205 hci_stack->acl_fragmentation_total_size = 0; 5206 hci_stack->acl_fragmentation_pos = 0; 5207 } 5208 } 5209 return false; 5210 } 5211 5212 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5213 static bool hci_run_iso_fragments(void){ 5214 if (hci_stack->iso_fragmentation_total_size > 0u) { 5215 // TODO: flow control 5216 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5217 hci_send_iso_packet_fragments(); 5218 return true; 5219 } 5220 } 5221 return false; 5222 } 5223 #endif 5224 5225 #ifdef ENABLE_CLASSIC 5226 5227 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5228 static bool hci_classic_operation_active(void) { 5229 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5230 return true; 5231 } 5232 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5233 return true; 5234 } 5235 btstack_linked_item_t * it; 5236 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5237 hci_connection_t *connection = (hci_connection_t *) it; 5238 switch (connection->state) { 5239 case SENT_CREATE_CONNECTION: 5240 case SENT_CANCEL_CONNECTION: 5241 case SENT_DISCONNECT: 5242 return true; 5243 default: 5244 break; 5245 } 5246 } 5247 return false; 5248 } 5249 #endif 5250 5251 static bool hci_run_general_gap_classic(void){ 5252 5253 // assert stack is working and classic is active 5254 if (hci_classic_supported() == false) return false; 5255 if (hci_stack->state != HCI_STATE_WORKING) return false; 5256 5257 // decline incoming connections 5258 if (hci_stack->decline_reason){ 5259 uint8_t reason = hci_stack->decline_reason; 5260 hci_stack->decline_reason = 0; 5261 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5262 return true; 5263 } 5264 5265 if (hci_stack->gap_tasks_classic != 0){ 5266 hci_run_gap_tasks_classic(); 5267 return true; 5268 } 5269 5270 // start/stop inquiry 5271 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5272 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5273 if (hci_classic_operation_active() == false) 5274 #endif 5275 { 5276 uint8_t duration = hci_stack->inquiry_state; 5277 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5278 if (hci_stack->inquiry_max_period_length != 0){ 5279 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); 5280 } else { 5281 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5282 } 5283 return true; 5284 } 5285 } 5286 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5287 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5288 hci_send_cmd(&hci_inquiry_cancel); 5289 return true; 5290 } 5291 5292 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5293 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5294 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5295 return true; 5296 } 5297 5298 // remote name request 5299 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5300 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5301 if (hci_classic_operation_active() == false) 5302 #endif 5303 { 5304 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5305 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5306 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5307 return true; 5308 } 5309 } 5310 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5311 // Local OOB data 5312 if (hci_stack->classic_read_local_oob_data){ 5313 hci_stack->classic_read_local_oob_data = false; 5314 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5315 hci_send_cmd(&hci_read_local_extended_oob_data); 5316 } else { 5317 hci_send_cmd(&hci_read_local_oob_data); 5318 } 5319 } 5320 #endif 5321 // pairing 5322 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5323 uint8_t state = hci_stack->gap_pairing_state; 5324 uint8_t pin_code[16]; 5325 switch (state){ 5326 case GAP_PAIRING_STATE_SEND_PIN: 5327 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5328 memset(pin_code, 0, 16); 5329 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5330 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5331 break; 5332 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5333 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5334 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5335 break; 5336 case GAP_PAIRING_STATE_SEND_PASSKEY: 5337 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5338 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5339 break; 5340 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5341 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5342 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5343 break; 5344 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5345 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5346 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5347 break; 5348 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5349 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5350 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5351 break; 5352 default: 5353 break; 5354 } 5355 return true; 5356 } 5357 return false; 5358 } 5359 #endif 5360 5361 #ifdef ENABLE_BLE 5362 5363 #ifdef ENABLE_LE_CENTRAL 5364 static void hci_le_scan_stop(void){ 5365 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5366 if (hci_extended_advertising_supported()) { 5367 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5368 } else 5369 #endif 5370 { 5371 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5372 } 5373 } 5374 #endif 5375 5376 #ifdef ENABLE_LE_PERIPHERAL 5377 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5378 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5379 uint8_t operation = 0; 5380 if (pos == 0){ 5381 // first fragment or complete data 5382 operation |= 1; 5383 } 5384 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5385 // last fragment or complete data 5386 operation |= 2; 5387 } 5388 return operation; 5389 } 5390 #endif 5391 #endif 5392 5393 static bool hci_run_general_gap_le(void){ 5394 5395 btstack_linked_list_iterator_t lit; 5396 5397 // Phase 1: collect what to stop 5398 5399 #ifdef ENABLE_LE_CENTRAL 5400 bool scanning_stop = false; 5401 bool connecting_stop = false; 5402 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5403 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5404 bool periodic_sync_stop = false; 5405 #endif 5406 #endif 5407 #endif 5408 5409 #ifdef ENABLE_LE_PERIPHERAL 5410 bool advertising_stop = false; 5411 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5412 le_advertising_set_t * advertising_stop_set = NULL; 5413 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5414 bool periodic_advertising_stop = false; 5415 #endif 5416 #endif 5417 #endif 5418 5419 // check if own address changes 5420 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5421 5422 // check if whitelist needs modification 5423 bool whitelist_modification_pending = false; 5424 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5425 while (btstack_linked_list_iterator_has_next(&lit)){ 5426 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5427 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5428 whitelist_modification_pending = true; 5429 break; 5430 } 5431 } 5432 5433 // check if resolving list needs modification 5434 bool resolving_list_modification_pending = false; 5435 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5436 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5437 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5438 resolving_list_modification_pending = true; 5439 } 5440 #endif 5441 5442 #ifdef ENABLE_LE_CENTRAL 5443 5444 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5445 // check if periodic advertiser list needs modification 5446 bool periodic_list_modification_pending = false; 5447 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5448 while (btstack_linked_list_iterator_has_next(&lit)){ 5449 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5450 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5451 periodic_list_modification_pending = true; 5452 break; 5453 } 5454 } 5455 #endif 5456 5457 // scanning control 5458 if (hci_stack->le_scanning_active) { 5459 // stop if: 5460 // - parameter change required 5461 // - it's disabled 5462 // - whitelist change required but used for scanning 5463 // - resolving list modified 5464 // - own address changes 5465 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5466 if ((hci_stack->le_scanning_param_update) || 5467 !hci_stack->le_scanning_enabled || 5468 (scanning_uses_whitelist && whitelist_modification_pending) || 5469 resolving_list_modification_pending || 5470 random_address_change){ 5471 5472 scanning_stop = true; 5473 } 5474 } 5475 5476 // connecting control 5477 bool connecting_with_whitelist; 5478 switch (hci_stack->le_connecting_state){ 5479 case LE_CONNECTING_DIRECT: 5480 case LE_CONNECTING_WHITELIST: 5481 // stop connecting if: 5482 // - connecting uses white and whitelist modification pending 5483 // - if it got disabled 5484 // - resolving list modified 5485 // - own address changes 5486 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5487 if ((connecting_with_whitelist && whitelist_modification_pending) || 5488 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5489 resolving_list_modification_pending || 5490 random_address_change) { 5491 5492 connecting_stop = true; 5493 } 5494 break; 5495 default: 5496 break; 5497 } 5498 5499 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5500 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5501 // periodic sync control 5502 bool sync_with_advertiser_list; 5503 switch(hci_stack->le_periodic_sync_state){ 5504 case LE_CONNECTING_DIRECT: 5505 case LE_CONNECTING_WHITELIST: 5506 // stop sync if: 5507 // - sync with advertiser list and advertiser list modification pending 5508 // - if it got disabled 5509 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5510 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5511 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5512 periodic_sync_stop = true; 5513 } 5514 break; 5515 default: 5516 break; 5517 } 5518 #endif 5519 #endif 5520 5521 #endif /* ENABLE_LE_CENTRAL */ 5522 5523 #ifdef ENABLE_LE_PERIPHERAL 5524 // le advertisement control 5525 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5526 // stop if: 5527 // - parameter change required 5528 // - random address used in advertising and changes 5529 // - it's disabled 5530 // - whitelist change required but used for advertisement filter policy 5531 // - resolving list modified 5532 // - own address changes 5533 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5534 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5535 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5536 if (advertising_change || 5537 (advertising_uses_random_address && random_address_change) || 5538 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5539 (advertising_uses_whitelist && whitelist_modification_pending) || 5540 resolving_list_modification_pending || 5541 random_address_change) { 5542 5543 advertising_stop = true; 5544 } 5545 } 5546 5547 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5548 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5549 btstack_linked_list_iterator_t it; 5550 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5551 while (btstack_linked_list_iterator_has_next(&it)){ 5552 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5553 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5554 // stop if: 5555 // - parameter change required 5556 // - random address used in connectable advertising and changes 5557 // - it's disabled 5558 // - whitelist change required but used for advertisement filter policy 5559 // - resolving list modified 5560 // - own address changes 5561 // - advertisement set will be removed 5562 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5563 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5564 bool advertising_uses_random_address = 5565 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5566 advertising_connectable; 5567 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5568 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5569 bool advertising_set_random_address_change = 5570 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5571 bool advertising_set_will_be_removed = 5572 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5573 if (advertising_parameter_change || 5574 (advertising_uses_random_address && advertising_set_random_address_change) || 5575 (advertising_enabled == false) || 5576 (advertising_uses_whitelist && whitelist_modification_pending) || 5577 resolving_list_modification_pending || 5578 advertising_set_will_be_removed) { 5579 5580 advertising_stop = true; 5581 advertising_stop_set = advertising_set; 5582 break; 5583 } 5584 } 5585 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5586 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5587 // stop if: 5588 // - it's disabled 5589 // - parameter change required 5590 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5591 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5592 if ((periodic_enabled == false) || periodic_parameter_change){ 5593 periodic_advertising_stop = true; 5594 advertising_stop_set = advertising_set; 5595 } 5596 } 5597 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5598 } 5599 } 5600 #endif 5601 5602 #endif 5603 5604 5605 // Phase 2: stop everything that should be off during modifications 5606 5607 5608 // 2.1 Outgoing connection 5609 #ifdef ENABLE_LE_CENTRAL 5610 if (connecting_stop){ 5611 hci_send_cmd(&hci_le_create_connection_cancel); 5612 return true; 5613 } 5614 #endif 5615 5616 // 2.2 Scanning 5617 #ifdef ENABLE_LE_CENTRAL 5618 if (scanning_stop){ 5619 hci_stack->le_scanning_active = false; 5620 hci_le_scan_stop(); 5621 return true; 5622 } 5623 5624 // 2.3 Periodic Sync 5625 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5626 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5627 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5628 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5629 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5630 return true; 5631 } 5632 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5633 if (periodic_sync_stop){ 5634 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5635 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5636 return true; 5637 } 5638 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5639 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5640 #endif /* ENABLE_LE_CENTRAL */ 5641 5642 // 2.4 Advertising: legacy, extended, periodic 5643 #ifdef ENABLE_LE_PERIPHERAL 5644 if (advertising_stop){ 5645 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5646 if (hci_extended_advertising_supported()) { 5647 uint8_t advertising_stop_handle; 5648 if (advertising_stop_set != NULL){ 5649 advertising_stop_handle = advertising_stop_set->advertising_handle; 5650 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5651 } else { 5652 advertising_stop_handle = 0; 5653 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5654 } 5655 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5656 const uint16_t durations[] = { 0 }; 5657 const uint16_t max_events[] = { 0 }; 5658 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5659 } else 5660 #endif 5661 { 5662 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5663 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5664 } 5665 return true; 5666 } 5667 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5668 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5669 if (periodic_advertising_stop){ 5670 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5671 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5672 return true; 5673 } 5674 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5675 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5676 #endif /* ENABLE_LE_PERIPHERAL */ 5677 5678 5679 // Phase 3: modify 5680 5681 if (random_address_change){ 5682 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5683 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5684 if (hci_extended_advertising_supported()) { 5685 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5686 } 5687 #endif 5688 { 5689 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5690 } 5691 return true; 5692 } 5693 5694 #ifdef ENABLE_LE_CENTRAL 5695 if (hci_stack->le_scanning_param_update){ 5696 hci_stack->le_scanning_param_update = false; 5697 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5698 if (hci_extended_advertising_supported()){ 5699 // prepare arrays for all PHYs 5700 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5701 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5702 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5703 uint8_t scanning_phys = 1; // LE 1M PHY 5704 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5705 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5706 } else 5707 #endif 5708 { 5709 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5710 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5711 } 5712 return true; 5713 } 5714 #endif 5715 5716 #ifdef ENABLE_LE_PERIPHERAL 5717 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5718 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5719 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5720 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5721 if (hci_extended_advertising_supported()){ 5722 // map advertisment type to advertising event properties 5723 uint16_t adv_event_properties = 0; 5724 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5725 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5726 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5727 } 5728 hci_stack->le_advertising_set_in_current_command = 0; 5729 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5730 0, 5731 adv_event_properties, 5732 hci_stack->le_advertisements_interval_min, 5733 hci_stack->le_advertisements_interval_max, 5734 hci_stack->le_advertisements_channel_map, 5735 hci_stack->le_advertisements_own_addr_type, 5736 hci_stack->le_advertisements_direct_address_type, 5737 hci_stack->le_advertisements_direct_address, 5738 hci_stack->le_advertisements_filter_policy, 5739 0x7f, // tx power: no preference 5740 0x01, // primary adv phy: LE 1M 5741 0, // secondary adv max skip 5742 0, // secondary adv phy 5743 0, // adv sid 5744 0 // scan request notification 5745 ); 5746 } 5747 #endif 5748 { 5749 hci_send_cmd(&hci_le_set_advertising_parameters, 5750 hci_stack->le_advertisements_interval_min, 5751 hci_stack->le_advertisements_interval_max, 5752 hci_stack->le_advertisements_type, 5753 hci_stack->le_advertisements_own_addr_type, 5754 hci_stack->le_advertisements_direct_address_type, 5755 hci_stack->le_advertisements_direct_address, 5756 hci_stack->le_advertisements_channel_map, 5757 hci_stack->le_advertisements_filter_policy); 5758 } 5759 return true; 5760 } 5761 5762 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5763 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5764 uint8_t adv_data_clean[31]; 5765 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5766 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5767 hci_stack->le_advertisements_data_len); 5768 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5769 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5770 if (hci_extended_advertising_supported()){ 5771 hci_stack->le_advertising_set_in_current_command = 0; 5772 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5773 } else 5774 #endif 5775 { 5776 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5777 } 5778 return true; 5779 } 5780 5781 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5782 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5783 uint8_t scan_data_clean[31]; 5784 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5785 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5786 hci_stack->le_scan_response_data_len); 5787 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5788 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5789 if (hci_extended_advertising_supported()){ 5790 hci_stack->le_advertising_set_in_current_command = 0; 5791 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5792 } else 5793 #endif 5794 { 5795 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5796 } 5797 return true; 5798 } 5799 5800 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5801 if (hci_extended_advertising_supported()) { 5802 btstack_linked_list_iterator_t it; 5803 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5804 while (btstack_linked_list_iterator_has_next(&it)){ 5805 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5806 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5807 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5808 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5809 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5810 return true; 5811 } 5812 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5813 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5814 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5815 return true; 5816 } 5817 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5818 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5819 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5820 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5821 advertising_set->advertising_handle, 5822 advertising_set->extended_params.advertising_event_properties, 5823 advertising_set->extended_params.primary_advertising_interval_min, 5824 advertising_set->extended_params.primary_advertising_interval_max, 5825 advertising_set->extended_params.primary_advertising_channel_map, 5826 advertising_set->extended_params.own_address_type, 5827 advertising_set->extended_params.peer_address_type, 5828 advertising_set->extended_params.peer_address, 5829 advertising_set->extended_params.advertising_filter_policy, 5830 advertising_set->extended_params.advertising_tx_power, 5831 advertising_set->extended_params.primary_advertising_phy, 5832 advertising_set->extended_params.secondary_advertising_max_skip, 5833 advertising_set->extended_params.secondary_advertising_phy, 5834 advertising_set->extended_params.advertising_sid, 5835 advertising_set->extended_params.scan_request_notification_enable 5836 ); 5837 return true; 5838 } 5839 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5840 uint16_t pos = advertising_set->adv_data_pos; 5841 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5842 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5843 if ((operation & 0x02) != 0){ 5844 // last fragment or complete data 5845 operation |= 2; 5846 advertising_set->adv_data_pos = 0; 5847 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5848 } else { 5849 advertising_set->adv_data_pos += data_to_upload; 5850 } 5851 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5852 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5853 return true; 5854 } 5855 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5856 uint16_t pos = advertising_set->scan_data_pos; 5857 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5858 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5859 if ((operation & 0x02) != 0){ 5860 advertising_set->scan_data_pos = 0; 5861 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5862 } else { 5863 advertising_set->scan_data_pos += data_to_upload; 5864 } 5865 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5866 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5867 return true; 5868 } 5869 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5870 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5871 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5872 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5873 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5874 advertising_set->advertising_handle, 5875 advertising_set->periodic_params.periodic_advertising_interval_min, 5876 advertising_set->periodic_params.periodic_advertising_interval_max, 5877 advertising_set->periodic_params.periodic_advertising_properties); 5878 return true; 5879 } 5880 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5881 uint16_t pos = advertising_set->periodic_data_pos; 5882 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5883 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5884 if ((operation & 0x02) != 0){ 5885 // last fragment or complete data 5886 operation |= 2; 5887 advertising_set->periodic_data_pos = 0; 5888 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5889 } else { 5890 advertising_set->periodic_data_pos += data_to_upload; 5891 } 5892 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5893 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5894 return true; 5895 } 5896 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5897 } 5898 } 5899 #endif 5900 5901 #endif 5902 5903 #ifdef ENABLE_LE_CENTRAL 5904 // if connect with whitelist was active and is not cancelled yet, wait until next time 5905 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5906 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5907 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5908 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5909 #endif 5910 #endif 5911 5912 // LE Whitelist Management 5913 if (whitelist_modification_pending){ 5914 // add/remove entries 5915 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5916 while (btstack_linked_list_iterator_has_next(&lit)){ 5917 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5918 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5919 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5920 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5921 return true; 5922 } 5923 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5924 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5925 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5926 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5927 return true; 5928 } 5929 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5930 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5931 btstack_memory_whitelist_entry_free(entry); 5932 } 5933 } 5934 } 5935 5936 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5937 // LE Resolving List Management 5938 if (resolving_list_supported) { 5939 uint16_t i; 5940 switch (hci_stack->le_resolving_list_state) { 5941 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5942 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5943 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5944 return true; 5945 case LE_RESOLVING_LIST_READ_SIZE: 5946 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5947 hci_send_cmd(&hci_le_read_resolving_list_size); 5948 return true; 5949 case LE_RESOLVING_LIST_SEND_CLEAR: 5950 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5951 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5952 sizeof(hci_stack->le_resolving_list_add_entries)); 5953 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5954 sizeof(hci_stack->le_resolving_list_remove_entries)); 5955 hci_send_cmd(&hci_le_clear_resolving_list); 5956 return true; 5957 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5958 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5959 uint8_t offset = i >> 3; 5960 uint8_t mask = 1 << (i & 7); 5961 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5962 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5963 bd_addr_t peer_identity_addreses; 5964 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5965 sm_key_t peer_irk; 5966 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5967 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5968 5969 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5970 // trigger whitelist entry 'update' (work around for controller bug) 5971 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5972 while (btstack_linked_list_iterator_has_next(&lit)) { 5973 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5974 if (entry->address_type != peer_identity_addr_type) continue; 5975 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5976 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5977 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5978 } 5979 #endif 5980 5981 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5982 peer_identity_addreses); 5983 return true; 5984 } 5985 5986 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5987 5988 /* fall through */ 5989 5990 case LE_RESOLVING_LIST_ADD_ENTRIES: 5991 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5992 uint8_t offset = i >> 3; 5993 uint8_t mask = 1 << (i & 7); 5994 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5995 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 5996 bd_addr_t peer_identity_addreses; 5997 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5998 sm_key_t peer_irk; 5999 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6000 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6001 if (btstack_is_null(peer_irk, 16)) continue; 6002 const uint8_t *local_irk = gap_get_persistent_irk(); 6003 // command uses format specifier 'P' that stores 16-byte value without flip 6004 uint8_t local_irk_flipped[16]; 6005 uint8_t peer_irk_flipped[16]; 6006 reverse_128(local_irk, local_irk_flipped); 6007 reverse_128(peer_irk, peer_irk_flipped); 6008 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6009 peer_irk_flipped, local_irk_flipped); 6010 return true; 6011 } 6012 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6013 break; 6014 6015 default: 6016 break; 6017 } 6018 } 6019 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6020 #endif 6021 6022 #ifdef ENABLE_LE_CENTRAL 6023 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6024 // LE Whitelist Management 6025 if (periodic_list_modification_pending){ 6026 // add/remove entries 6027 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6028 while (btstack_linked_list_iterator_has_next(&lit)){ 6029 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6030 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6031 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6032 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6033 return true; 6034 } 6035 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6036 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6037 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6038 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6039 return true; 6040 } 6041 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6042 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6043 btstack_memory_periodic_advertiser_list_entry_free(entry); 6044 } 6045 } 6046 } 6047 #endif 6048 #endif 6049 6050 // post-pone all actions until stack is fully working 6051 if (hci_stack->state != HCI_STATE_WORKING) return false; 6052 6053 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6054 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6055 6056 // Phase 4: restore state 6057 6058 #ifdef ENABLE_LE_CENTRAL 6059 // re-start scanning 6060 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6061 hci_stack->le_scanning_active = true; 6062 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6063 if (hci_extended_advertising_supported()){ 6064 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 6065 } else 6066 #endif 6067 { 6068 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 6069 } 6070 return true; 6071 } 6072 #endif 6073 6074 #ifdef ENABLE_LE_CENTRAL 6075 // re-start connecting 6076 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6077 bd_addr_t null_addr; 6078 memset(null_addr, 0, 6); 6079 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6080 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6081 hci_send_cmd(&hci_le_create_connection, 6082 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 6083 hci_stack->le_connection_scan_window, // scan interval: 30 ms 6084 1, // use whitelist 6085 0, // peer address type 6086 null_addr, // peer bd addr 6087 hci_stack->le_connection_own_addr_type, // our addr type: 6088 hci_stack->le_connection_interval_min, // conn interval min 6089 hci_stack->le_connection_interval_max, // conn interval max 6090 hci_stack->le_connection_latency, // conn latency 6091 hci_stack->le_supervision_timeout, // conn latency 6092 hci_stack->le_minimum_ce_length, // min ce length 6093 hci_stack->le_maximum_ce_length // max ce length 6094 ); 6095 return true; 6096 } 6097 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6098 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6099 switch(hci_stack->le_periodic_sync_request){ 6100 case LE_CONNECTING_DIRECT: 6101 case LE_CONNECTING_WHITELIST: 6102 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6103 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6104 hci_stack->le_periodic_sync_options, 6105 hci_stack->le_periodic_sync_advertising_sid, 6106 hci_stack->le_periodic_sync_advertiser_address_type, 6107 hci_stack->le_periodic_sync_advertiser_address, 6108 hci_stack->le_periodic_sync_skip, 6109 hci_stack->le_periodic_sync_timeout, 6110 hci_stack->le_periodic_sync_cte_type); 6111 return true; 6112 default: 6113 break; 6114 } 6115 } 6116 #endif 6117 #endif 6118 6119 #ifdef ENABLE_LE_PERIPHERAL 6120 // re-start advertising 6121 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6122 // check if advertisements should be enabled given 6123 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6124 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6125 6126 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6127 if (hci_extended_advertising_supported()){ 6128 const uint8_t advertising_handles[] = { 0 }; 6129 const uint16_t durations[] = { 0 }; 6130 const uint16_t max_events[] = { 0 }; 6131 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6132 } else 6133 #endif 6134 { 6135 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6136 } 6137 return true; 6138 } 6139 6140 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6141 if (hci_extended_advertising_supported()) { 6142 btstack_linked_list_iterator_t it; 6143 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6144 while (btstack_linked_list_iterator_has_next(&it)) { 6145 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6146 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6147 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6148 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6149 const uint16_t durations[] = { advertising_set->enable_timeout }; 6150 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6151 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6152 return true; 6153 } 6154 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6155 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6156 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6157 uint8_t enable = 1; 6158 if (advertising_set->periodic_include_adi){ 6159 enable |= 2; 6160 } 6161 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6162 return true; 6163 } 6164 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6165 } 6166 } 6167 #endif 6168 #endif 6169 6170 return false; 6171 } 6172 6173 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6174 static bool hci_run_iso_tasks(void){ 6175 btstack_linked_list_iterator_t it; 6176 6177 // BIG 6178 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6179 while (btstack_linked_list_iterator_has_next(&it)){ 6180 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6181 switch (big->state){ 6182 case LE_AUDIO_BIG_STATE_CREATE: 6183 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6184 hci_send_cmd(&hci_le_create_big, 6185 big->params->big_handle, 6186 big->params->advertising_handle, 6187 big->params->num_bis, 6188 big->params->sdu_interval_us, 6189 big->params->max_sdu, 6190 big->params->max_transport_latency_ms, 6191 big->params->rtn, 6192 big->params->phy, 6193 big->params->packing, 6194 big->params->framing, 6195 big->params->encryption, 6196 big->params->broadcast_code); 6197 return true; 6198 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6199 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6200 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); 6201 return true; 6202 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6203 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6204 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6205 return true; 6206 case LE_AUDIO_BIG_STATE_TERMINATE: 6207 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6208 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6209 return true; 6210 default: 6211 break; 6212 } 6213 } 6214 6215 // BIG Sync 6216 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6217 while (btstack_linked_list_iterator_has_next(&it)){ 6218 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6219 switch (big_sync->state){ 6220 case LE_AUDIO_BIG_STATE_CREATE: 6221 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6222 hci_send_cmd(&hci_le_big_create_sync, 6223 big_sync->params->big_handle, 6224 big_sync->params->sync_handle, 6225 big_sync->params->encryption, 6226 big_sync->params->broadcast_code, 6227 big_sync->params->mse, 6228 big_sync->params->big_sync_timeout_10ms, 6229 big_sync->params->num_bis, 6230 big_sync->params->bis_indices); 6231 return true; 6232 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6233 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6234 hci_send_cmd(&hci_le_setup_iso_data_path, big_sync->bis_con_handles[big_sync->state_vars.next_bis], 1, 0, 0, 0, 0, 0, 0, NULL); 6235 return true; 6236 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6237 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6238 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6239 return true; 6240 case LE_AUDIO_BIG_STATE_TERMINATE: 6241 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6242 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6243 return true; 6244 default: 6245 break; 6246 } 6247 } 6248 6249 return false; 6250 } 6251 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6252 #endif 6253 6254 static bool hci_run_general_pending_commands(void){ 6255 btstack_linked_item_t * it; 6256 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6257 hci_connection_t * connection = (hci_connection_t *) it; 6258 6259 switch(connection->state){ 6260 case SEND_CREATE_CONNECTION: 6261 switch(connection->address_type){ 6262 #ifdef ENABLE_CLASSIC 6263 case BD_ADDR_TYPE_ACL: 6264 log_info("sending hci_create_connection"); 6265 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6266 break; 6267 #endif 6268 default: 6269 #ifdef ENABLE_BLE 6270 #ifdef ENABLE_LE_CENTRAL 6271 log_info("sending hci_le_create_connection"); 6272 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6273 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6274 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6275 if (hci_extended_advertising_supported()) { 6276 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 6277 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 6278 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 6279 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 6280 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 6281 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 6282 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 6283 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 6284 hci_send_cmd(&hci_le_extended_create_connection, 6285 0, // don't use whitelist 6286 hci_stack->le_connection_own_addr_type, // our addr type: 6287 connection->address_type, // peer address type 6288 connection->address, // peer bd addr 6289 1, // initiating PHY - 1M 6290 le_connection_scan_interval, // conn scan interval 6291 le_connection_scan_window, // conn scan windows 6292 le_connection_interval_min, // conn interval min 6293 le_connection_interval_max, // conn interval max 6294 le_connection_latency, // conn latency 6295 le_supervision_timeout, // conn latency 6296 le_minimum_ce_length, // min ce length 6297 le_maximum_ce_length // max ce length 6298 ); } 6299 else 6300 #endif 6301 { 6302 hci_send_cmd(&hci_le_create_connection, 6303 hci_stack->le_connection_scan_interval, // conn scan interval 6304 hci_stack->le_connection_scan_window, // conn scan windows 6305 0, // don't use whitelist 6306 connection->address_type, // peer address type 6307 connection->address, // peer bd addr 6308 hci_stack->le_connection_own_addr_type, // our addr type: 6309 hci_stack->le_connection_interval_min, // conn interval min 6310 hci_stack->le_connection_interval_max, // conn interval max 6311 hci_stack->le_connection_latency, // conn latency 6312 hci_stack->le_supervision_timeout, // conn latency 6313 hci_stack->le_minimum_ce_length, // min ce length 6314 hci_stack->le_maximum_ce_length // max ce length 6315 ); 6316 } 6317 connection->state = SENT_CREATE_CONNECTION; 6318 #endif 6319 #endif 6320 break; 6321 } 6322 return true; 6323 6324 #ifdef ENABLE_CLASSIC 6325 case RECEIVED_CONNECTION_REQUEST: 6326 connection->role = HCI_ROLE_SLAVE; 6327 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6328 log_info("sending hci_accept_connection_request"); 6329 connection->state = ACCEPTED_CONNECTION_REQUEST; 6330 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6331 return true; 6332 } 6333 break; 6334 #endif 6335 case SEND_DISCONNECT: 6336 connection->state = SENT_DISCONNECT; 6337 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6338 return true; 6339 6340 default: 6341 break; 6342 } 6343 6344 // no further commands if connection is about to get shut down 6345 if (connection->state == SENT_DISCONNECT) continue; 6346 6347 #ifdef ENABLE_CLASSIC 6348 6349 // Handling link key request requires remote supported features 6350 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6351 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6352 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6353 6354 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6355 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6356 if (have_link_key && security_level_sufficient){ 6357 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6358 } else { 6359 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6360 } 6361 return true; 6362 } 6363 6364 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6365 log_info("denying to pin request"); 6366 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6367 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6368 return true; 6369 } 6370 6371 // security assessment requires remote features 6372 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6373 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6374 hci_ssp_assess_security_on_io_cap_request(connection); 6375 // 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 6376 } 6377 6378 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6379 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6380 // set authentication requirements: 6381 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6382 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6383 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6384 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6385 authreq |= 1; 6386 } 6387 bool bonding = hci_stack->bondable; 6388 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6389 // if we have received IO Cap Response, we're in responder role 6390 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6391 if (bonding && !remote_bonding){ 6392 log_info("Remote not bonding, dropping local flag"); 6393 bonding = false; 6394 } 6395 } 6396 if (bonding){ 6397 if (connection->bonding_flags & BONDING_DEDICATED){ 6398 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6399 } else { 6400 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6401 } 6402 } 6403 uint8_t have_oob_data = 0; 6404 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6405 if (connection->classic_oob_c_192 != NULL){ 6406 have_oob_data |= 1; 6407 } 6408 if (connection->classic_oob_c_256 != NULL){ 6409 have_oob_data |= 2; 6410 } 6411 #endif 6412 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6413 return true; 6414 } 6415 6416 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6417 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6418 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6419 return true; 6420 } 6421 6422 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6423 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6424 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6425 const uint8_t zero[16] = { 0 }; 6426 const uint8_t * r_192 = zero; 6427 const uint8_t * c_192 = zero; 6428 const uint8_t * r_256 = zero; 6429 const uint8_t * c_256 = zero; 6430 // verify P-256 OOB 6431 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6432 c_256 = connection->classic_oob_c_256; 6433 if (connection->classic_oob_r_256 != NULL) { 6434 r_256 = connection->classic_oob_r_256; 6435 } 6436 } 6437 // verify P-192 OOB 6438 if ((connection->classic_oob_c_192 != NULL)) { 6439 c_192 = connection->classic_oob_c_192; 6440 if (connection->classic_oob_r_192 != NULL) { 6441 r_192 = connection->classic_oob_r_192; 6442 } 6443 } 6444 6445 // assess security 6446 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6447 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6448 if (need_level_4 && !can_reach_level_4){ 6449 log_info("Level 4 required, but not possible -> abort"); 6450 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6451 // send oob negative reply 6452 c_256 = NULL; 6453 c_192 = NULL; 6454 } 6455 6456 // Reply 6457 if (c_256 != zero) { 6458 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6459 } else if (c_192 != zero){ 6460 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6461 } else { 6462 hci_stack->classic_oob_con_handle = connection->con_handle; 6463 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6464 } 6465 return true; 6466 } 6467 #endif 6468 6469 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6470 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6471 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6472 return true; 6473 } 6474 6475 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6476 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6477 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6478 return true; 6479 } 6480 6481 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6482 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6483 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6484 return true; 6485 } 6486 6487 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6488 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6489 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6490 connection->state = SENT_DISCONNECT; 6491 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6492 return true; 6493 } 6494 6495 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6496 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6497 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6498 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6499 return true; 6500 } 6501 6502 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6503 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6504 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6505 return true; 6506 } 6507 6508 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6509 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6510 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6511 return true; 6512 } 6513 6514 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6515 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6516 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6517 return true; 6518 } 6519 6520 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6521 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6522 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6523 return true; 6524 } 6525 6526 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6527 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6528 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6529 return true; 6530 } 6531 #endif 6532 6533 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6534 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6535 #ifdef ENABLE_CLASSIC 6536 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6537 #endif 6538 if (connection->state != SENT_DISCONNECT){ 6539 connection->state = SENT_DISCONNECT; 6540 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6541 return true; 6542 } 6543 } 6544 6545 #ifdef ENABLE_CLASSIC 6546 uint16_t sniff_min_interval; 6547 switch (connection->sniff_min_interval){ 6548 case 0: 6549 break; 6550 case 0xffff: 6551 connection->sniff_min_interval = 0; 6552 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6553 return true; 6554 default: 6555 sniff_min_interval = connection->sniff_min_interval; 6556 connection->sniff_min_interval = 0; 6557 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6558 return true; 6559 } 6560 6561 if (connection->sniff_subrating_max_latency != 0xffff){ 6562 uint16_t max_latency = connection->sniff_subrating_max_latency; 6563 connection->sniff_subrating_max_latency = 0; 6564 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6565 return true; 6566 } 6567 6568 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6569 uint8_t service_type = (uint8_t) connection->qos_service_type; 6570 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6571 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); 6572 return true; 6573 } 6574 6575 if (connection->request_role != HCI_ROLE_INVALID){ 6576 hci_role_t role = connection->request_role; 6577 connection->request_role = HCI_ROLE_INVALID; 6578 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6579 return true; 6580 } 6581 #endif 6582 6583 if (connection->gap_connection_tasks != 0){ 6584 #ifdef ENABLE_CLASSIC 6585 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6586 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6587 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6588 return true; 6589 } 6590 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6591 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6592 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6593 return true; 6594 } 6595 #endif 6596 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6597 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6598 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6599 return true; 6600 } 6601 } 6602 6603 #ifdef ENABLE_BLE 6604 switch (connection->le_con_parameter_update_state){ 6605 // response to L2CAP CON PARAMETER UPDATE REQUEST 6606 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6607 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6608 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6609 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6610 0x0000, 0xffff); 6611 return true; 6612 case CON_PARAMETER_UPDATE_REPLY: 6613 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6614 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6615 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6616 0x0000, 0xffff); 6617 return true; 6618 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6619 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6620 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6621 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6622 return true; 6623 default: 6624 break; 6625 } 6626 if (connection->le_phy_update_all_phys != 0xffu){ 6627 uint8_t all_phys = connection->le_phy_update_all_phys; 6628 connection->le_phy_update_all_phys = 0xff; 6629 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); 6630 return true; 6631 } 6632 #endif 6633 } 6634 return false; 6635 } 6636 6637 static void hci_run(void){ 6638 6639 // stack state sub statemachines 6640 switch (hci_stack->state) { 6641 case HCI_STATE_INITIALIZING: 6642 hci_initializing_run(); 6643 break; 6644 case HCI_STATE_HALTING: 6645 hci_halting_run(); 6646 break; 6647 case HCI_STATE_FALLING_ASLEEP: 6648 hci_falling_asleep_run(); 6649 break; 6650 default: 6651 break; 6652 } 6653 6654 // allow to run after initialization to working transition 6655 if (hci_stack->state != HCI_STATE_WORKING){ 6656 return; 6657 } 6658 6659 bool done; 6660 6661 // send continuation fragments first, as they block the prepared packet buffer 6662 done = hci_run_acl_fragments(); 6663 if (done) return; 6664 6665 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6666 done = hci_run_iso_fragments(); 6667 if (done) return; 6668 #endif 6669 6670 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6671 // send host num completed packets next as they don't require num_cmd_packets > 0 6672 if (!hci_can_send_comand_packet_transport()) return; 6673 if (hci_stack->host_completed_packets){ 6674 hci_host_num_completed_packets(); 6675 return; 6676 } 6677 #endif 6678 6679 if (!hci_can_send_command_packet_now()) return; 6680 6681 // global/non-connection oriented commands 6682 6683 6684 #ifdef ENABLE_CLASSIC 6685 // general gap classic 6686 done = hci_run_general_gap_classic(); 6687 if (done) return; 6688 #endif 6689 6690 #ifdef ENABLE_BLE 6691 // general gap le 6692 done = hci_run_general_gap_le(); 6693 if (done) return; 6694 6695 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6696 // ISO related tasks, e.g. BIG create/terminate/sync 6697 done = hci_run_iso_tasks(); 6698 if (done) return; 6699 #endif 6700 #endif 6701 6702 // send pending HCI commands 6703 hci_run_general_pending_commands(); 6704 } 6705 6706 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6707 // house-keeping 6708 6709 #ifdef ENABLE_CLASSIC 6710 bd_addr_t addr; 6711 hci_connection_t * conn; 6712 #endif 6713 #ifdef ENABLE_LE_CENTRAL 6714 uint8_t initiator_filter_policy; 6715 #endif 6716 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6717 uint8_t i; 6718 uint8_t num_cis; 6719 hci_con_handle_t cis_handle; 6720 uint8_t status; 6721 #endif 6722 6723 uint16_t opcode = little_endian_read_16(packet, 0); 6724 switch (opcode) { 6725 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6726 hci_stack->loopback_mode = packet[3]; 6727 break; 6728 6729 #ifdef ENABLE_CLASSIC 6730 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6731 reverse_bd_addr(&packet[3], addr); 6732 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6733 6734 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6735 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6736 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6737 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6738 } 6739 6740 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6741 if (!conn) { 6742 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6743 if (!conn) { 6744 // notify client that alloc failed 6745 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6746 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6747 } 6748 conn->state = SEND_CREATE_CONNECTION; 6749 conn->role = HCI_ROLE_MASTER; 6750 } 6751 6752 log_info("conn state %u", conn->state); 6753 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6754 switch (conn->state) { 6755 // if connection active exists 6756 case OPEN: 6757 // and OPEN, emit connection complete command 6758 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6759 // packet not sent to controller 6760 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6761 case RECEIVED_DISCONNECTION_COMPLETE: 6762 // create connection triggered in disconnect complete event, let's do it now 6763 break; 6764 case SEND_CREATE_CONNECTION: 6765 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6766 if (hci_classic_operation_active()){ 6767 return ERROR_CODE_SUCCESS; 6768 } 6769 #endif 6770 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6771 break; 6772 default: 6773 // otherwise, just ignore as it is already in the open process 6774 // packet not sent to controller 6775 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6776 } 6777 conn->state = SENT_CREATE_CONNECTION; 6778 6779 // track outgoing connection 6780 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6781 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6782 break; 6783 6784 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6785 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6786 // setup_synchronous_connection? Voice setting at offset 22 6787 // TODO: compare to current setting if sco connection already active 6788 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6789 break; 6790 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6791 // accept_synchronous_connection? Voice setting at offset 18 6792 // TODO: compare to current setting if sco connection already active 6793 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6794 // track outgoing connection 6795 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6796 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6797 break; 6798 #endif 6799 #endif 6800 6801 #ifdef ENABLE_BLE 6802 #ifdef ENABLE_LE_CENTRAL 6803 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6804 // white list used? 6805 initiator_filter_policy = packet[7]; 6806 switch (initiator_filter_policy) { 6807 case 0: 6808 // whitelist not used 6809 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6810 break; 6811 case 1: 6812 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6813 break; 6814 default: 6815 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6816 break; 6817 } 6818 // track outgoing connection 6819 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6820 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6821 break; 6822 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6823 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6824 break; 6825 #endif 6826 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6827 #ifdef ENABLE_LE_CENTRAL 6828 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6829 status = ERROR_CODE_SUCCESS; 6830 num_cis = packet[3]; 6831 // setup hci_iso_streams 6832 for (i=0;i<num_cis;i++){ 6833 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6834 status = hci_iso_stream_create(cis_handle, 0xff); 6835 if (status != ERROR_CODE_SUCCESS) { 6836 break; 6837 } 6838 } 6839 // free structs on error 6840 if (status != ERROR_CODE_SUCCESS){ 6841 hci_iso_stream_requested_finalize(0xff); 6842 return status; 6843 } 6844 break; 6845 #endif /* ENABLE_LE_CENTRAL */ 6846 #ifdef ENABLE_LE_PERIPHERAL 6847 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6848 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6849 status = hci_iso_stream_create(cis_handle, 0xff); 6850 if (status != ERROR_CODE_SUCCESS){ 6851 return status; 6852 } 6853 break; 6854 #endif /* ENABLE_LE_PERIPHERAL */ 6855 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6856 #endif /* ENABLE_BLE */ 6857 default: 6858 break; 6859 } 6860 6861 hci_stack->num_cmd_packets--; 6862 6863 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6864 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6865 if (err != 0){ 6866 return ERROR_CODE_HARDWARE_FAILURE; 6867 } 6868 return ERROR_CODE_SUCCESS; 6869 } 6870 6871 // disconnect because of security block 6872 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6873 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6874 if (!connection) return; 6875 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6876 } 6877 6878 6879 // Configure Secure Simple Pairing 6880 6881 #ifdef ENABLE_CLASSIC 6882 6883 // enable will enable SSP during init 6884 void gap_ssp_set_enable(int enable){ 6885 hci_stack->ssp_enable = enable; 6886 } 6887 6888 static int hci_local_ssp_activated(void){ 6889 return gap_ssp_supported() && hci_stack->ssp_enable; 6890 } 6891 6892 // if set, BTstack will respond to io capability request using authentication requirement 6893 void gap_ssp_set_io_capability(int io_capability){ 6894 hci_stack->ssp_io_capability = io_capability; 6895 } 6896 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6897 hci_stack->ssp_authentication_requirement = authentication_requirement; 6898 } 6899 6900 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6901 void gap_ssp_set_auto_accept(int auto_accept){ 6902 hci_stack->ssp_auto_accept = auto_accept; 6903 } 6904 6905 void gap_secure_connections_enable(bool enable){ 6906 hci_stack->secure_connections_enable = enable; 6907 } 6908 bool gap_secure_connections_active(void){ 6909 return hci_stack->secure_connections_active; 6910 } 6911 6912 #endif 6913 6914 // va_list part of hci_send_cmd 6915 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6916 if (!hci_can_send_command_packet_now()){ 6917 log_error("hci_send_cmd called but cannot send packet now"); 6918 return ERROR_CODE_COMMAND_DISALLOWED; 6919 } 6920 6921 // for HCI INITIALIZATION 6922 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6923 hci_stack->last_cmd_opcode = cmd->opcode; 6924 6925 hci_reserve_packet_buffer(); 6926 uint8_t * packet = hci_stack->hci_packet_buffer; 6927 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6928 uint8_t status = hci_send_cmd_packet(packet, size); 6929 6930 // release packet buffer on error or for synchronous transport implementations 6931 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6932 hci_release_packet_buffer(); 6933 hci_emit_transport_packet_sent(); 6934 } 6935 6936 return status; 6937 } 6938 6939 /** 6940 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6941 */ 6942 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6943 va_list argptr; 6944 va_start(argptr, cmd); 6945 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6946 va_end(argptr); 6947 return status; 6948 } 6949 6950 // Create various non-HCI events. 6951 // TODO: generalize, use table similar to hci_create_command 6952 6953 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6954 // dump packet 6955 if (dump) { 6956 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6957 } 6958 6959 // dispatch to all event handlers 6960 btstack_linked_list_iterator_t it; 6961 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6962 while (btstack_linked_list_iterator_has_next(&it)){ 6963 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6964 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6965 } 6966 } 6967 6968 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6969 if (!hci_stack->acl_packet_handler) return; 6970 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6971 } 6972 6973 #ifdef ENABLE_CLASSIC 6974 static void hci_notify_if_sco_can_send_now(void){ 6975 // notify SCO sender if waiting 6976 if (!hci_stack->sco_waiting_for_can_send_now) return; 6977 if (hci_can_send_sco_packet_now()){ 6978 hci_stack->sco_waiting_for_can_send_now = 0; 6979 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6980 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6981 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6982 } 6983 } 6984 6985 // parsing end emitting has been merged to reduce code size 6986 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6987 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6988 6989 uint8_t * eir_data; 6990 ad_context_t context; 6991 const uint8_t * name; 6992 uint8_t name_len; 6993 6994 if (size < 3) return; 6995 6996 int event_type = hci_event_packet_get_type(packet); 6997 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 6998 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 6999 7000 switch (event_type){ 7001 case HCI_EVENT_INQUIRY_RESULT: 7002 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7003 if (size != (3 + (num_responses * 14))) return; 7004 break; 7005 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7006 if (size != 257) return; 7007 if (num_responses != 1) return; 7008 break; 7009 default: 7010 return; 7011 } 7012 7013 // event[1] is set at the end 7014 int i; 7015 for (i=0; i<num_responses;i++){ 7016 memset(event, 0, sizeof(event)); 7017 event[0] = GAP_EVENT_INQUIRY_RESULT; 7018 uint8_t event_size = 27; // if name is not set by EIR 7019 7020 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7021 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7022 (void)memcpy(&event[9], 7023 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7024 3); // class of device 7025 (void)memcpy(&event[12], 7026 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7027 2); // clock offset 7028 7029 switch (event_type){ 7030 case HCI_EVENT_INQUIRY_RESULT: 7031 // 14,15,16,17 = 0, size 18 7032 break; 7033 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7034 event[14] = 1; 7035 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7036 // 16,17 = 0, size 18 7037 break; 7038 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7039 event[14] = 1; 7040 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7041 // EIR packets only contain a single inquiry response 7042 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7043 name = NULL; 7044 // Iterate over EIR data 7045 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7046 uint8_t data_type = ad_iterator_get_data_type(&context); 7047 uint8_t data_size = ad_iterator_get_data_len(&context); 7048 const uint8_t * data = ad_iterator_get_data(&context); 7049 // Prefer Complete Local Name over Shortened Local Name 7050 switch (data_type){ 7051 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7052 if (name) continue; 7053 /* fall through */ 7054 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7055 name = data; 7056 name_len = data_size; 7057 break; 7058 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7059 if (data_size != 8) break; 7060 event[16] = 1; 7061 memcpy(&event[17], data, 8); 7062 break; 7063 default: 7064 break; 7065 } 7066 } 7067 if (name){ 7068 event[25] = 1; 7069 // truncate name if needed 7070 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7071 event[26] = len; 7072 (void)memcpy(&event[27], name, len); 7073 event_size += len; 7074 } 7075 break; 7076 default: 7077 return; 7078 } 7079 event[1] = event_size - 2; 7080 hci_emit_event(event, event_size, 1); 7081 } 7082 } 7083 #endif 7084 7085 void hci_emit_state(void){ 7086 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7087 uint8_t event[3]; 7088 event[0] = BTSTACK_EVENT_STATE; 7089 event[1] = sizeof(event) - 2u; 7090 event[2] = hci_stack->state; 7091 hci_emit_event(event, sizeof(event), 1); 7092 } 7093 7094 #ifdef ENABLE_CLASSIC 7095 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7096 uint8_t event[13]; 7097 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7098 event[1] = sizeof(event) - 2; 7099 event[2] = status; 7100 little_endian_store_16(event, 3, con_handle); 7101 reverse_bd_addr(address, &event[5]); 7102 event[11] = 1; // ACL connection 7103 event[12] = 0; // encryption disabled 7104 hci_emit_event(event, sizeof(event), 1); 7105 } 7106 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7107 if (disable_l2cap_timeouts) return; 7108 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7109 uint8_t event[4]; 7110 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7111 event[1] = sizeof(event) - 2; 7112 little_endian_store_16(event, 2, conn->con_handle); 7113 hci_emit_event(event, sizeof(event), 1); 7114 } 7115 #endif 7116 7117 #ifdef ENABLE_BLE 7118 #ifdef ENABLE_LE_CENTRAL 7119 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){ 7120 uint8_t event[21]; 7121 event[0] = HCI_EVENT_LE_META; 7122 event[1] = sizeof(event) - 2u; 7123 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7124 event[3] = status; 7125 little_endian_store_16(event, 4, con_handle); 7126 event[6] = 0; // TODO: role 7127 event[7] = address_type; 7128 reverse_bd_addr(address, &event[8]); 7129 little_endian_store_16(event, 14, 0); // interval 7130 little_endian_store_16(event, 16, 0); // latency 7131 little_endian_store_16(event, 18, 0); // supervision timeout 7132 event[20] = 0; // master clock accuracy 7133 hci_emit_event(event, sizeof(event), 1); 7134 } 7135 #endif 7136 #endif 7137 7138 static void hci_emit_transport_packet_sent(void){ 7139 // notify upper stack that it might be possible to send again 7140 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7141 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7142 } 7143 7144 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7145 uint8_t event[6]; 7146 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7147 event[1] = sizeof(event) - 2u; 7148 event[2] = 0; // status = OK 7149 little_endian_store_16(event, 3, con_handle); 7150 event[5] = reason; 7151 hci_emit_event(event, sizeof(event), 1); 7152 } 7153 7154 static void hci_emit_nr_connections_changed(void){ 7155 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7156 uint8_t event[3]; 7157 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7158 event[1] = sizeof(event) - 2u; 7159 event[2] = nr_hci_connections(); 7160 hci_emit_event(event, sizeof(event), 1); 7161 } 7162 7163 static void hci_emit_hci_open_failed(void){ 7164 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7165 uint8_t event[2]; 7166 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7167 event[1] = sizeof(event) - 2u; 7168 hci_emit_event(event, sizeof(event), 1); 7169 } 7170 7171 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7172 log_info("hci_emit_dedicated_bonding_result %u ", status); 7173 uint8_t event[9]; 7174 int pos = 0; 7175 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7176 event[pos++] = sizeof(event) - 2u; 7177 event[pos++] = status; 7178 reverse_bd_addr(address, &event[pos]); 7179 hci_emit_event(event, sizeof(event), 1); 7180 } 7181 7182 7183 #ifdef ENABLE_CLASSIC 7184 7185 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7186 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7187 uint8_t event[5]; 7188 int pos = 0; 7189 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7190 event[pos++] = sizeof(event) - 2; 7191 little_endian_store_16(event, 2, con_handle); 7192 pos += 2; 7193 event[pos++] = level; 7194 hci_emit_event(event, sizeof(event), 1); 7195 } 7196 7197 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7198 if (!connection) return LEVEL_0; 7199 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7200 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7201 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7202 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7203 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7204 // LEVEL 4 always requires 128 bit encrytion key size 7205 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7206 security_level = LEVEL_3; 7207 } 7208 return security_level; 7209 } 7210 7211 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7212 uint8_t event[4]; 7213 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7214 event[1] = sizeof(event) - 2; 7215 event[2] = discoverable; 7216 event[3] = connectable; 7217 hci_emit_event(event, sizeof(event), 1); 7218 } 7219 7220 // query if remote side supports eSCO 7221 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7222 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7223 if (!connection) return false; 7224 return (connection->remote_supported_features[0] & 1) != 0; 7225 } 7226 7227 static bool hci_ssp_supported(hci_connection_t * connection){ 7228 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7229 return (connection->bonding_flags & mask) == mask; 7230 } 7231 7232 // query if remote side supports SSP 7233 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7234 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7235 if (!connection) return false; 7236 return hci_ssp_supported(connection) ? 1 : 0; 7237 } 7238 7239 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7240 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7241 } 7242 7243 /** 7244 * Check if remote supported features query has completed 7245 */ 7246 bool hci_remote_features_available(hci_con_handle_t handle){ 7247 hci_connection_t * connection = hci_connection_for_handle(handle); 7248 if (!connection) return false; 7249 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7250 } 7251 7252 /** 7253 * Trigger remote supported features query 7254 */ 7255 7256 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7257 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7258 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7259 } 7260 } 7261 7262 void hci_remote_features_query(hci_con_handle_t con_handle){ 7263 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7264 if (!connection) return; 7265 hci_trigger_remote_features_for_connection(connection); 7266 hci_run(); 7267 } 7268 7269 // GAP API 7270 /** 7271 * @bbrief enable/disable bonding. default is enabled 7272 * @praram enabled 7273 */ 7274 void gap_set_bondable_mode(int enable){ 7275 hci_stack->bondable = enable ? 1 : 0; 7276 } 7277 /** 7278 * @brief Get bondable mode. 7279 * @return 1 if bondable 7280 */ 7281 int gap_get_bondable_mode(void){ 7282 return hci_stack->bondable; 7283 } 7284 7285 /** 7286 * @brief map link keys to security levels 7287 */ 7288 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7289 switch (link_key_type){ 7290 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7291 return LEVEL_4; 7292 case COMBINATION_KEY: 7293 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7294 return LEVEL_3; 7295 default: 7296 return LEVEL_2; 7297 } 7298 } 7299 7300 /** 7301 * @brief map link keys to secure connection yes/no 7302 */ 7303 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7304 switch (link_key_type){ 7305 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7306 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7307 return true; 7308 default: 7309 return false; 7310 } 7311 } 7312 7313 /** 7314 * @brief map link keys to authenticated 7315 */ 7316 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7317 switch (link_key_type){ 7318 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7319 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7320 return true; 7321 default: 7322 return false; 7323 } 7324 } 7325 7326 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7327 log_info("gap_mitm_protection_required_for_security_level %u", level); 7328 return level > LEVEL_2; 7329 } 7330 7331 /** 7332 * @brief get current security level 7333 */ 7334 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7335 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7336 if (!connection) return LEVEL_0; 7337 return gap_security_level_for_connection(connection); 7338 } 7339 7340 /** 7341 * @brief request connection to device to 7342 * @result GAP_AUTHENTICATION_RESULT 7343 */ 7344 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7345 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7346 if (!connection){ 7347 hci_emit_security_level(con_handle, LEVEL_0); 7348 return; 7349 } 7350 7351 btstack_assert(hci_is_le_connection(connection) == false); 7352 7353 // 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) 7354 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7355 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7356 requested_level = LEVEL_4; 7357 } 7358 7359 gap_security_level_t current_level = gap_security_level(con_handle); 7360 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7361 requested_level, connection->requested_security_level, current_level); 7362 7363 // authentication active if authentication request was sent or planned level > 0 7364 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7365 if (authentication_active){ 7366 // authentication already active 7367 if (connection->requested_security_level < requested_level){ 7368 // increase requested level as new level is higher 7369 // TODO: handle re-authentication when done 7370 connection->requested_security_level = requested_level; 7371 } 7372 } else { 7373 // no request active, notify if security sufficient 7374 if (requested_level <= current_level){ 7375 hci_emit_security_level(con_handle, current_level); 7376 return; 7377 } 7378 7379 // store request 7380 connection->requested_security_level = requested_level; 7381 7382 // start to authenticate connection 7383 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7384 7385 // request remote features if not already active, also trigger hci_run 7386 hci_remote_features_query(con_handle); 7387 } 7388 } 7389 7390 /** 7391 * @brief start dedicated bonding with device. disconnect after bonding 7392 * @param device 7393 * @param request MITM protection 7394 * @result GAP_DEDICATED_BONDING_COMPLETE 7395 */ 7396 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7397 7398 // create connection state machine 7399 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7400 7401 if (!connection){ 7402 return BTSTACK_MEMORY_ALLOC_FAILED; 7403 } 7404 7405 // delete linkn key 7406 gap_drop_link_key_for_bd_addr(device); 7407 7408 // configure LEVEL_2/3, dedicated bonding 7409 connection->state = SEND_CREATE_CONNECTION; 7410 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7411 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7412 connection->bonding_flags = BONDING_DEDICATED; 7413 7414 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7415 7416 // handle: connnection failure (connection complete != ok) 7417 // handle: authentication failure 7418 // handle: disconnect on done 7419 7420 hci_run(); 7421 7422 return 0; 7423 } 7424 7425 void gap_set_local_name(const char * local_name){ 7426 hci_stack->local_name = local_name; 7427 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7428 // also update EIR if not set by user 7429 if (hci_stack->eir_data == NULL){ 7430 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7431 } 7432 hci_run(); 7433 } 7434 #endif 7435 7436 7437 #ifdef ENABLE_BLE 7438 7439 #ifdef ENABLE_LE_CENTRAL 7440 void gap_start_scan(void){ 7441 hci_stack->le_scanning_enabled = true; 7442 hci_run(); 7443 } 7444 7445 void gap_stop_scan(void){ 7446 hci_stack->le_scanning_enabled = false; 7447 hci_run(); 7448 } 7449 7450 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7451 hci_stack->le_scan_type = scan_type; 7452 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7453 hci_stack->le_scan_interval = scan_interval; 7454 hci_stack->le_scan_window = scan_window; 7455 hci_stack->le_scanning_param_update = true; 7456 hci_run(); 7457 } 7458 7459 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7460 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7461 } 7462 7463 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7464 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7465 if (!conn){ 7466 // disallow if le connection is already outgoing 7467 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7468 log_error("le connection already active"); 7469 return ERROR_CODE_COMMAND_DISALLOWED; 7470 } 7471 7472 log_info("gap_connect: no connection exists yet, creating context"); 7473 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7474 if (!conn){ 7475 // notify client that alloc failed 7476 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7477 log_info("gap_connect: failed to alloc hci_connection_t"); 7478 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7479 } 7480 7481 // set le connecting state 7482 if (hci_is_le_connection_type(addr_type)){ 7483 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7484 } 7485 7486 conn->state = SEND_CREATE_CONNECTION; 7487 log_info("gap_connect: send create connection next"); 7488 hci_run(); 7489 return ERROR_CODE_SUCCESS; 7490 } 7491 7492 if (!hci_is_le_connection(conn) || 7493 (conn->state == SEND_CREATE_CONNECTION) || 7494 (conn->state == SENT_CREATE_CONNECTION)) { 7495 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7496 log_error("gap_connect: classic connection or connect is already being created"); 7497 return GATT_CLIENT_IN_WRONG_STATE; 7498 } 7499 7500 // check if connection was just disconnected 7501 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7502 log_info("gap_connect: send create connection (again)"); 7503 conn->state = SEND_CREATE_CONNECTION; 7504 hci_run(); 7505 return ERROR_CODE_SUCCESS; 7506 } 7507 7508 log_info("gap_connect: context exists with state %u", conn->state); 7509 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7510 hci_run(); 7511 return ERROR_CODE_SUCCESS; 7512 } 7513 7514 // @assumption: only a single outgoing LE Connection exists 7515 static hci_connection_t * gap_get_outgoing_connection(void){ 7516 btstack_linked_item_t *it; 7517 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7518 hci_connection_t * conn = (hci_connection_t *) it; 7519 if (!hci_is_le_connection(conn)) continue; 7520 switch (conn->state){ 7521 case SEND_CREATE_CONNECTION: 7522 case SENT_CREATE_CONNECTION: 7523 return conn; 7524 default: 7525 break; 7526 }; 7527 } 7528 return NULL; 7529 } 7530 7531 uint8_t gap_connect_cancel(void){ 7532 hci_connection_t * conn; 7533 switch (hci_stack->le_connecting_request){ 7534 case LE_CONNECTING_IDLE: 7535 break; 7536 case LE_CONNECTING_WHITELIST: 7537 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7538 hci_run(); 7539 break; 7540 case LE_CONNECTING_DIRECT: 7541 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7542 conn = gap_get_outgoing_connection(); 7543 if (conn == NULL){ 7544 hci_run(); 7545 } else { 7546 switch (conn->state){ 7547 case SEND_CREATE_CONNECTION: 7548 // skip sending create connection and emit event instead 7549 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7550 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7551 btstack_memory_hci_connection_free( conn ); 7552 break; 7553 case SENT_CREATE_CONNECTION: 7554 // let hci_run_general_gap_le cancel outgoing connection 7555 hci_run(); 7556 break; 7557 default: 7558 break; 7559 } 7560 } 7561 break; 7562 default: 7563 btstack_unreachable(); 7564 break; 7565 } 7566 return ERROR_CODE_SUCCESS; 7567 } 7568 7569 /** 7570 * @brief Set connection parameters for outgoing connections 7571 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7572 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7573 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7574 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7575 * @param conn_latency, default: 4 7576 * @param supervision_timeout (unit: 10ms), default: 720 ms 7577 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7578 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7579 */ 7580 7581 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7582 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7583 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7584 hci_stack->le_connection_scan_interval = conn_scan_interval; 7585 hci_stack->le_connection_scan_window = conn_scan_window; 7586 hci_stack->le_connection_interval_min = conn_interval_min; 7587 hci_stack->le_connection_interval_max = conn_interval_max; 7588 hci_stack->le_connection_latency = conn_latency; 7589 hci_stack->le_supervision_timeout = supervision_timeout; 7590 hci_stack->le_minimum_ce_length = min_ce_length; 7591 hci_stack->le_maximum_ce_length = max_ce_length; 7592 } 7593 #endif 7594 7595 /** 7596 * @brief Updates the connection parameters for a given LE connection 7597 * @param handle 7598 * @param conn_interval_min (unit: 1.25ms) 7599 * @param conn_interval_max (unit: 1.25ms) 7600 * @param conn_latency 7601 * @param supervision_timeout (unit: 10ms) 7602 * @return 0 if ok 7603 */ 7604 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7605 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7606 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7607 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7608 connection->le_conn_interval_min = conn_interval_min; 7609 connection->le_conn_interval_max = conn_interval_max; 7610 connection->le_conn_latency = conn_latency; 7611 connection->le_supervision_timeout = supervision_timeout; 7612 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7613 hci_run(); 7614 return 0; 7615 } 7616 7617 /** 7618 * @brief Request an update of the connection parameter for a given LE connection 7619 * @param handle 7620 * @param conn_interval_min (unit: 1.25ms) 7621 * @param conn_interval_max (unit: 1.25ms) 7622 * @param conn_latency 7623 * @param supervision_timeout (unit: 10ms) 7624 * @return 0 if ok 7625 */ 7626 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7627 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7628 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7629 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7630 connection->le_conn_interval_min = conn_interval_min; 7631 connection->le_conn_interval_max = conn_interval_max; 7632 connection->le_conn_latency = conn_latency; 7633 connection->le_supervision_timeout = supervision_timeout; 7634 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7635 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7636 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7637 return 0; 7638 } 7639 7640 #ifdef ENABLE_LE_PERIPHERAL 7641 7642 /** 7643 * @brief Set Advertisement Data 7644 * @param advertising_data_length 7645 * @param advertising_data (max 31 octets) 7646 * @note data is not copied, pointer has to stay valid 7647 */ 7648 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7649 hci_stack->le_advertisements_data_len = advertising_data_length; 7650 hci_stack->le_advertisements_data = advertising_data; 7651 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7652 hci_run(); 7653 } 7654 7655 /** 7656 * @brief Set Scan Response Data 7657 * @param advertising_data_length 7658 * @param advertising_data (max 31 octets) 7659 * @note data is not copied, pointer has to stay valid 7660 */ 7661 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7662 hci_stack->le_scan_response_data_len = scan_response_data_length; 7663 hci_stack->le_scan_response_data = scan_response_data; 7664 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7665 hci_run(); 7666 } 7667 7668 /** 7669 * @brief Set Advertisement Parameters 7670 * @param adv_int_min 7671 * @param adv_int_max 7672 * @param adv_type 7673 * @param direct_address_type 7674 * @param direct_address 7675 * @param channel_map 7676 * @param filter_policy 7677 * 7678 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7679 */ 7680 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7681 uint8_t direct_address_typ, bd_addr_t direct_address, 7682 uint8_t channel_map, uint8_t filter_policy) { 7683 7684 hci_stack->le_advertisements_interval_min = adv_int_min; 7685 hci_stack->le_advertisements_interval_max = adv_int_max; 7686 hci_stack->le_advertisements_type = adv_type; 7687 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7688 hci_stack->le_advertisements_channel_map = channel_map; 7689 hci_stack->le_advertisements_filter_policy = filter_policy; 7690 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7691 6); 7692 7693 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7694 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7695 hci_run(); 7696 } 7697 7698 /** 7699 * @brief Enable/Disable Advertisements 7700 * @param enabled 7701 */ 7702 void gap_advertisements_enable(int enabled){ 7703 if (enabled == 0){ 7704 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7705 } else { 7706 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7707 } 7708 hci_update_advertisements_enabled_for_current_roles(); 7709 hci_run(); 7710 } 7711 7712 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7713 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7714 btstack_linked_list_iterator_t it; 7715 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7716 while (btstack_linked_list_iterator_has_next(&it)){ 7717 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7718 if ( item->advertising_handle == advertising_handle ) { 7719 return item; 7720 } 7721 } 7722 return NULL; 7723 } 7724 7725 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7726 // find free advertisement handle 7727 uint8_t advertisement_handle; 7728 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7729 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7730 } 7731 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7732 // clear 7733 memset(storage, 0, sizeof(le_advertising_set_t)); 7734 // copy params 7735 storage->advertising_handle = advertisement_handle; 7736 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7737 // add to list 7738 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7739 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7740 *out_advertising_handle = advertisement_handle; 7741 // set tasks and start 7742 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7743 hci_run(); 7744 return ERROR_CODE_SUCCESS; 7745 } 7746 7747 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7748 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7749 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7750 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7751 // set tasks and start 7752 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7753 hci_run(); 7754 return ERROR_CODE_SUCCESS; 7755 } 7756 7757 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7758 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7759 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7760 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7761 return ERROR_CODE_SUCCESS; 7762 } 7763 7764 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7765 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7766 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7767 memcpy(advertising_set->random_address, random_address, 6); 7768 // set tasks and start 7769 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7770 hci_run(); 7771 return ERROR_CODE_SUCCESS; 7772 } 7773 7774 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7775 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7776 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7777 advertising_set->adv_data = advertising_data; 7778 advertising_set->adv_data_len = advertising_data_length; 7779 // set tasks and start 7780 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7781 hci_run(); 7782 return ERROR_CODE_SUCCESS; 7783 } 7784 7785 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){ 7786 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7787 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7788 advertising_set->scan_data = scan_response_data; 7789 advertising_set->scan_data_len = scan_response_data_length; 7790 // set tasks and start 7791 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7792 hci_run(); 7793 return ERROR_CODE_SUCCESS; 7794 } 7795 7796 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7797 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7798 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7799 advertising_set->enable_timeout = timeout; 7800 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7801 // set tasks and start 7802 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7803 hci_run(); 7804 return ERROR_CODE_SUCCESS; 7805 } 7806 7807 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7808 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7809 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7810 // set tasks and start 7811 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7812 hci_run(); 7813 return ERROR_CODE_SUCCESS; 7814 } 7815 7816 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7817 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7818 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7819 // set tasks and start 7820 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7821 hci_run(); 7822 return ERROR_CODE_SUCCESS; 7823 } 7824 7825 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7826 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7827 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7828 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7829 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7830 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7831 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7832 // set tasks and start 7833 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7834 hci_run(); 7835 return ERROR_CODE_SUCCESS; 7836 } 7837 7838 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7839 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7840 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7841 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7842 return ERROR_CODE_SUCCESS; 7843 } 7844 7845 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7846 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7847 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7848 advertising_set->periodic_data = periodic_data; 7849 advertising_set->periodic_data_len = periodic_data_length; 7850 // set tasks and start 7851 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7852 hci_run(); 7853 return ERROR_CODE_SUCCESS; 7854 } 7855 7856 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7857 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7858 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7859 // set tasks and start 7860 advertising_set->periodic_include_adi = include_adi; 7861 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7862 hci_run(); 7863 return ERROR_CODE_SUCCESS; 7864 } 7865 7866 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7867 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7868 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7869 // set tasks and start 7870 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7871 hci_run(); 7872 return ERROR_CODE_SUCCESS; 7873 } 7874 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7875 7876 #endif 7877 7878 #endif 7879 7880 void hci_le_set_own_address_type(uint8_t own_address_type){ 7881 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7882 if (own_address_type == hci_stack->le_own_addr_type) return; 7883 hci_stack->le_own_addr_type = own_address_type; 7884 7885 #ifdef ENABLE_LE_PERIPHERAL 7886 // update advertisement parameters, too 7887 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7888 hci_run(); 7889 #endif 7890 #ifdef ENABLE_LE_CENTRAL 7891 // note: we don't update scan parameters or modify ongoing connection attempts 7892 #endif 7893 } 7894 7895 void hci_le_random_address_set(const bd_addr_t random_address){ 7896 memcpy(hci_stack->le_random_address, random_address, 6); 7897 hci_stack->le_random_address_set = true; 7898 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7899 hci_run(); 7900 } 7901 7902 #endif 7903 7904 uint8_t gap_disconnect(hci_con_handle_t handle){ 7905 hci_connection_t * conn = hci_connection_for_handle(handle); 7906 if (!conn){ 7907 hci_emit_disconnection_complete(handle, 0); 7908 return 0; 7909 } 7910 // ignore if already disconnected 7911 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7912 return 0; 7913 } 7914 conn->state = SEND_DISCONNECT; 7915 hci_run(); 7916 return 0; 7917 } 7918 7919 int gap_read_rssi(hci_con_handle_t con_handle){ 7920 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7921 if (hci_connection == NULL) return 0; 7922 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7923 hci_run(); 7924 return 1; 7925 } 7926 7927 /** 7928 * @brief Get connection type 7929 * @param con_handle 7930 * @result connection_type 7931 */ 7932 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7933 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7934 if (!conn) return GAP_CONNECTION_INVALID; 7935 switch (conn->address_type){ 7936 case BD_ADDR_TYPE_LE_PUBLIC: 7937 case BD_ADDR_TYPE_LE_RANDOM: 7938 return GAP_CONNECTION_LE; 7939 case BD_ADDR_TYPE_SCO: 7940 return GAP_CONNECTION_SCO; 7941 case BD_ADDR_TYPE_ACL: 7942 return GAP_CONNECTION_ACL; 7943 default: 7944 return GAP_CONNECTION_INVALID; 7945 } 7946 } 7947 7948 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7949 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7950 if (!conn) return HCI_ROLE_INVALID; 7951 return (hci_role_t) conn->role; 7952 } 7953 7954 7955 #ifdef ENABLE_CLASSIC 7956 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7957 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7958 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7959 conn->request_role = role; 7960 hci_run(); 7961 return ERROR_CODE_SUCCESS; 7962 } 7963 #endif 7964 7965 #ifdef ENABLE_BLE 7966 7967 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){ 7968 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7969 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7970 7971 conn->le_phy_update_all_phys = all_phys; 7972 conn->le_phy_update_tx_phys = tx_phys; 7973 conn->le_phy_update_rx_phys = rx_phys; 7974 conn->le_phy_update_phy_options = phy_options; 7975 7976 hci_run(); 7977 7978 return 0; 7979 } 7980 7981 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7982 // check if already in list 7983 btstack_linked_list_iterator_t it; 7984 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7985 while (btstack_linked_list_iterator_has_next(&it)) { 7986 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7987 if (entry->address_type != address_type) { 7988 continue; 7989 } 7990 if (memcmp(entry->address, address, 6) != 0) { 7991 continue; 7992 } 7993 // disallow if already scheduled to add 7994 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7995 return ERROR_CODE_COMMAND_DISALLOWED; 7996 } 7997 // still on controller, but scheduled to remove -> re-add 7998 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 7999 return ERROR_CODE_SUCCESS; 8000 } 8001 // alloc and add to list 8002 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8003 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8004 entry->address_type = address_type; 8005 (void)memcpy(entry->address, address, 6); 8006 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8007 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8008 return ERROR_CODE_SUCCESS; 8009 } 8010 8011 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8012 btstack_linked_list_iterator_t it; 8013 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8014 while (btstack_linked_list_iterator_has_next(&it)){ 8015 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8016 if (entry->address_type != address_type) { 8017 continue; 8018 } 8019 if (memcmp(entry->address, address, 6) != 0) { 8020 continue; 8021 } 8022 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8023 // remove from controller if already present 8024 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8025 } else { 8026 // directly remove entry from whitelist 8027 btstack_linked_list_iterator_remove(&it); 8028 btstack_memory_whitelist_entry_free(entry); 8029 } 8030 return ERROR_CODE_SUCCESS; 8031 } 8032 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8033 } 8034 8035 static void hci_whitelist_clear(void){ 8036 btstack_linked_list_iterator_t it; 8037 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8038 while (btstack_linked_list_iterator_has_next(&it)){ 8039 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8040 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8041 // remove from controller if already present 8042 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8043 continue; 8044 } 8045 // directly remove entry from whitelist 8046 btstack_linked_list_iterator_remove(&it); 8047 btstack_memory_whitelist_entry_free(entry); 8048 } 8049 } 8050 8051 // free all entries unconditionally 8052 static void hci_whitelist_free(void){ 8053 btstack_linked_list_iterator_t lit; 8054 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 8055 while (btstack_linked_list_iterator_has_next(&lit)){ 8056 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 8057 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 8058 btstack_memory_whitelist_entry_free(entry); 8059 } 8060 } 8061 8062 /** 8063 * @brief Clear Whitelist 8064 * @return 0 if ok 8065 */ 8066 uint8_t gap_whitelist_clear(void){ 8067 hci_whitelist_clear(); 8068 hci_run(); 8069 return ERROR_CODE_SUCCESS; 8070 } 8071 8072 /** 8073 * @brief Add Device to Whitelist 8074 * @param address_typ 8075 * @param address 8076 * @return 0 if ok 8077 */ 8078 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8079 uint8_t status = hci_whitelist_add(address_type, address); 8080 if (status){ 8081 return status; 8082 } 8083 hci_run(); 8084 return ERROR_CODE_SUCCESS; 8085 } 8086 8087 /** 8088 * @brief Remove Device from Whitelist 8089 * @param address_typ 8090 * @param address 8091 * @return 0 if ok 8092 */ 8093 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8094 uint8_t status = hci_whitelist_remove(address_type, address); 8095 if (status){ 8096 return status; 8097 } 8098 hci_run(); 8099 return ERROR_CODE_SUCCESS; 8100 } 8101 8102 #ifdef ENABLE_LE_CENTRAL 8103 /** 8104 * @brief Connect with Whitelist 8105 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8106 * @return - if ok 8107 */ 8108 uint8_t gap_connect_with_whitelist(void){ 8109 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8110 return ERROR_CODE_COMMAND_DISALLOWED; 8111 } 8112 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8113 hci_run(); 8114 return ERROR_CODE_SUCCESS; 8115 } 8116 8117 /** 8118 * @brief Auto Connection Establishment - Start Connecting to device 8119 * @param address_typ 8120 * @param address 8121 * @return 0 if ok 8122 */ 8123 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8124 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8125 return ERROR_CODE_COMMAND_DISALLOWED; 8126 } 8127 8128 uint8_t status = hci_whitelist_add(address_type, address); 8129 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8130 return status; 8131 } 8132 8133 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8134 8135 hci_run(); 8136 return ERROR_CODE_SUCCESS; 8137 } 8138 8139 /** 8140 * @brief Auto Connection Establishment - Stop Connecting to device 8141 * @param address_typ 8142 * @param address 8143 * @return 0 if ok 8144 */ 8145 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8146 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8147 return ERROR_CODE_COMMAND_DISALLOWED; 8148 } 8149 8150 hci_whitelist_remove(address_type, address); 8151 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8152 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8153 } 8154 hci_run(); 8155 return 0; 8156 } 8157 8158 /** 8159 * @brief Auto Connection Establishment - Stop everything 8160 * @note Convenience function to stop all active auto connection attempts 8161 */ 8162 uint8_t gap_auto_connection_stop_all(void){ 8163 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8164 return ERROR_CODE_COMMAND_DISALLOWED; 8165 } 8166 hci_whitelist_clear(); 8167 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8168 hci_run(); 8169 return ERROR_CODE_SUCCESS; 8170 } 8171 8172 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8173 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8174 if (!conn) return 0; 8175 return conn->le_connection_interval; 8176 } 8177 #endif 8178 #endif 8179 8180 #ifdef ENABLE_CLASSIC 8181 /** 8182 * @brief Set Extended Inquiry Response data 8183 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8184 * @note has to be done before stack starts up 8185 */ 8186 void gap_set_extended_inquiry_response(const uint8_t * data){ 8187 hci_stack->eir_data = data; 8188 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8189 hci_run(); 8190 } 8191 8192 /** 8193 * @brief Start GAP Classic Inquiry 8194 * @param duration in 1.28s units 8195 * @return 0 if ok 8196 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8197 */ 8198 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8199 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8200 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8201 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8202 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8203 } 8204 hci_stack->inquiry_state = duration_in_1280ms_units; 8205 hci_stack->inquiry_max_period_length = 0; 8206 hci_stack->inquiry_min_period_length = 0; 8207 hci_run(); 8208 return 0; 8209 } 8210 8211 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8212 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8213 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8214 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8215 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8216 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8217 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8218 8219 hci_stack->inquiry_state = duration; 8220 hci_stack->inquiry_max_period_length = max_period_length; 8221 hci_stack->inquiry_min_period_length = min_period_length; 8222 hci_run(); 8223 return 0; 8224 } 8225 8226 /** 8227 * @brief Stop GAP Classic Inquiry 8228 * @return 0 if ok 8229 */ 8230 int gap_inquiry_stop(void){ 8231 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8232 // emit inquiry complete event, before it even started 8233 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8234 hci_emit_event(event, sizeof(event), 1); 8235 return 0; 8236 } 8237 switch (hci_stack->inquiry_state){ 8238 case GAP_INQUIRY_STATE_ACTIVE: 8239 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8240 hci_run(); 8241 return ERROR_CODE_SUCCESS; 8242 case GAP_INQUIRY_STATE_PERIODIC: 8243 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8244 hci_run(); 8245 return ERROR_CODE_SUCCESS; 8246 default: 8247 return ERROR_CODE_COMMAND_DISALLOWED; 8248 } 8249 } 8250 8251 void gap_inquiry_set_lap(uint32_t lap){ 8252 hci_stack->inquiry_lap = lap; 8253 } 8254 8255 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8256 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8257 hci_stack->inquiry_scan_window = inquiry_scan_window; 8258 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8259 hci_run(); 8260 } 8261 8262 8263 /** 8264 * @brief Remote Name Request 8265 * @param addr 8266 * @param page_scan_repetition_mode 8267 * @param clock_offset only used when bit 15 is set 8268 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8269 */ 8270 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8271 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8272 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8273 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8274 hci_stack->remote_name_clock_offset = clock_offset; 8275 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8276 hci_run(); 8277 return 0; 8278 } 8279 8280 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8281 hci_stack->gap_pairing_state = state; 8282 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8283 hci_run(); 8284 return 0; 8285 } 8286 8287 /** 8288 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8289 * @param addr 8290 * @param pin_data 8291 * @param pin_len 8292 * @return 0 if ok 8293 */ 8294 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8295 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8296 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8297 hci_stack->gap_pairing_pin_len = pin_len; 8298 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8299 } 8300 8301 /** 8302 * @brief Legacy Pairing Pin Code Response 8303 * @param addr 8304 * @param pin 8305 * @return 0 if ok 8306 */ 8307 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8308 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8309 } 8310 8311 /** 8312 * @brief Abort Legacy Pairing 8313 * @param addr 8314 * @param pin 8315 * @return 0 if ok 8316 */ 8317 int gap_pin_code_negative(bd_addr_t addr){ 8318 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8319 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8320 } 8321 8322 /** 8323 * @brief SSP Passkey Response 8324 * @param addr 8325 * @param passkey 8326 * @return 0 if ok 8327 */ 8328 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8329 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8330 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8331 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8332 } 8333 8334 /** 8335 * @brief Abort SSP Passkey Entry/Pairing 8336 * @param addr 8337 * @param pin 8338 * @return 0 if ok 8339 */ 8340 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8341 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8342 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8343 } 8344 8345 /** 8346 * @brief Accept SSP Numeric Comparison 8347 * @param addr 8348 * @param passkey 8349 * @return 0 if ok 8350 */ 8351 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8352 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8353 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8354 } 8355 8356 /** 8357 * @brief Abort SSP Numeric Comparison/Pairing 8358 * @param addr 8359 * @param pin 8360 * @return 0 if ok 8361 */ 8362 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8363 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8364 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8365 } 8366 8367 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8368 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8369 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8370 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8371 connectionSetAuthenticationFlags(conn, flag); 8372 hci_run(); 8373 return ERROR_CODE_SUCCESS; 8374 } 8375 #endif 8376 8377 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8378 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8379 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8380 } 8381 8382 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8383 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8384 } 8385 #endif 8386 8387 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8388 /** 8389 * @brief Report Remote OOB Data 8390 * @param bd_addr 8391 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8392 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8393 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8394 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8395 */ 8396 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){ 8397 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8398 if (connection == NULL) { 8399 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8400 } 8401 connection->classic_oob_c_192 = c_192; 8402 connection->classic_oob_r_192 = r_192; 8403 8404 // ignore P-256 if not supported by us 8405 if (hci_stack->secure_connections_active){ 8406 connection->classic_oob_c_256 = c_256; 8407 connection->classic_oob_r_256 = r_256; 8408 } 8409 8410 return ERROR_CODE_SUCCESS; 8411 } 8412 /** 8413 * @brief Generate new OOB data 8414 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8415 */ 8416 void gap_ssp_generate_oob_data(void){ 8417 hci_stack->classic_read_local_oob_data = true; 8418 hci_run(); 8419 } 8420 8421 #endif 8422 8423 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8424 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8425 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8426 if (connection == NULL) { 8427 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8428 } 8429 8430 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8431 connection->link_key_type = type; 8432 8433 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8434 } 8435 8436 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8437 /** 8438 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8439 * @param inquiry_mode see bluetooth_defines.h 8440 */ 8441 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8442 hci_stack->inquiry_mode = inquiry_mode; 8443 } 8444 8445 /** 8446 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8447 */ 8448 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8449 hci_stack->sco_voice_setting = voice_setting; 8450 } 8451 8452 /** 8453 * @brief Get SCO Voice Setting 8454 * @return current voice setting 8455 */ 8456 uint16_t hci_get_sco_voice_setting(void){ 8457 return hci_stack->sco_voice_setting; 8458 } 8459 8460 static int hci_have_usb_transport(void){ 8461 if (!hci_stack->hci_transport) return 0; 8462 const char * transport_name = hci_stack->hci_transport->name; 8463 if (!transport_name) return 0; 8464 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8465 } 8466 8467 /** @brief Get SCO packet length for current SCO Voice setting 8468 * @note Using SCO packets of the exact length is required for USB transfer 8469 * @return Length of SCO packets in bytes (not audio frames) 8470 */ 8471 uint16_t hci_get_sco_packet_length(void){ 8472 uint16_t sco_packet_length = 0; 8473 8474 #ifdef ENABLE_SCO_OVER_HCI 8475 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8476 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8477 8478 if (hci_have_usb_transport()){ 8479 // see Core Spec for H2 USB Transfer. 8480 // 3 byte SCO header + 24 bytes per connection 8481 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8482 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8483 } else { 8484 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8485 sco_packet_length = 3 + 60 * multiplier; 8486 // assert that it still fits inside an SCO buffer 8487 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8488 sco_packet_length = 3 + 60; 8489 } 8490 } 8491 #endif 8492 8493 #ifdef HAVE_SCO_TRANSPORT 8494 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8495 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8496 sco_packet_length = 3 + 60 * multiplier; 8497 #endif 8498 return sco_packet_length; 8499 } 8500 8501 /** 8502 * @brief Sets the master/slave policy 8503 * @param policy (0: attempt to become master, 1: let connecting device decide) 8504 */ 8505 void hci_set_master_slave_policy(uint8_t policy){ 8506 hci_stack->master_slave_policy = policy; 8507 } 8508 8509 #endif 8510 8511 HCI_STATE hci_get_state(void){ 8512 return hci_stack->state; 8513 } 8514 8515 #ifdef ENABLE_CLASSIC 8516 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8517 hci_stack->gap_classic_accept_callback = accept_callback; 8518 } 8519 #endif 8520 8521 /** 8522 * @brief Set callback for Bluetooth Hardware Error 8523 */ 8524 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8525 hci_stack->hardware_error_callback = fn; 8526 } 8527 8528 void hci_disconnect_all(void){ 8529 btstack_linked_list_iterator_t it; 8530 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8531 while (btstack_linked_list_iterator_has_next(&it)){ 8532 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8533 if (con->state == SENT_DISCONNECT) continue; 8534 con->state = SEND_DISCONNECT; 8535 } 8536 hci_run(); 8537 } 8538 8539 uint16_t hci_get_manufacturer(void){ 8540 return hci_stack->manufacturer; 8541 } 8542 8543 #ifdef ENABLE_BLE 8544 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8545 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8546 if (!hci_con) return NULL; 8547 return &hci_con->sm_connection; 8548 } 8549 8550 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8551 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8552 #endif 8553 8554 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8555 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8556 if (hci_connection == NULL) return 0; 8557 if (hci_is_le_connection(hci_connection)){ 8558 #ifdef ENABLE_BLE 8559 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8560 if (sm_conn->sm_connection_encrypted) { 8561 return sm_conn->sm_actual_encryption_key_size; 8562 } 8563 #endif 8564 } else { 8565 #ifdef ENABLE_CLASSIC 8566 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8567 return hci_connection->encryption_key_size; 8568 } 8569 #endif 8570 } 8571 return 0; 8572 } 8573 8574 bool gap_authenticated(hci_con_handle_t con_handle){ 8575 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8576 if (hci_connection == NULL) return false; 8577 8578 switch (hci_connection->address_type){ 8579 #ifdef ENABLE_BLE 8580 case BD_ADDR_TYPE_LE_PUBLIC: 8581 case BD_ADDR_TYPE_LE_RANDOM: 8582 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8583 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8584 #endif 8585 #ifdef ENABLE_CLASSIC 8586 case BD_ADDR_TYPE_SCO: 8587 case BD_ADDR_TYPE_ACL: 8588 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8589 #endif 8590 default: 8591 return false; 8592 } 8593 } 8594 8595 bool gap_secure_connection(hci_con_handle_t con_handle){ 8596 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8597 if (hci_connection == NULL) return 0; 8598 8599 switch (hci_connection->address_type){ 8600 #ifdef ENABLE_BLE 8601 case BD_ADDR_TYPE_LE_PUBLIC: 8602 case BD_ADDR_TYPE_LE_RANDOM: 8603 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8604 return hci_connection->sm_connection.sm_connection_sc != 0; 8605 #endif 8606 #ifdef ENABLE_CLASSIC 8607 case BD_ADDR_TYPE_SCO: 8608 case BD_ADDR_TYPE_ACL: 8609 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8610 #endif 8611 default: 8612 return false; 8613 } 8614 } 8615 8616 bool gap_bonded(hci_con_handle_t con_handle){ 8617 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8618 if (hci_connection == NULL) return 0; 8619 8620 #ifdef ENABLE_CLASSIC 8621 link_key_t link_key; 8622 link_key_type_t link_key_type; 8623 #endif 8624 switch (hci_connection->address_type){ 8625 #ifdef ENABLE_BLE 8626 case BD_ADDR_TYPE_LE_PUBLIC: 8627 case BD_ADDR_TYPE_LE_RANDOM: 8628 return hci_connection->sm_connection.sm_le_db_index >= 0; 8629 #endif 8630 #ifdef ENABLE_CLASSIC 8631 case BD_ADDR_TYPE_SCO: 8632 case BD_ADDR_TYPE_ACL: 8633 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8634 #endif 8635 default: 8636 return false; 8637 } 8638 } 8639 8640 #ifdef ENABLE_BLE 8641 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8642 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8643 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8644 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8645 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8646 return sm_conn->sm_connection_authorization_state; 8647 } 8648 #endif 8649 8650 #ifdef ENABLE_CLASSIC 8651 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){ 8652 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8653 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8654 conn->sniff_min_interval = sniff_min_interval; 8655 conn->sniff_max_interval = sniff_max_interval; 8656 conn->sniff_attempt = sniff_attempt; 8657 conn->sniff_timeout = sniff_timeout; 8658 hci_run(); 8659 return 0; 8660 } 8661 8662 /** 8663 * @brief Exit Sniff mode 8664 * @param con_handle 8665 @ @return 0 if ok 8666 */ 8667 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8668 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8669 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8670 conn->sniff_min_interval = 0xffff; 8671 hci_run(); 8672 return 0; 8673 } 8674 8675 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){ 8676 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8677 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8678 conn->sniff_subrating_max_latency = max_latency; 8679 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8680 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8681 hci_run(); 8682 return ERROR_CODE_SUCCESS; 8683 } 8684 8685 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){ 8686 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8687 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8688 conn->qos_service_type = service_type; 8689 conn->qos_token_rate = token_rate; 8690 conn->qos_peak_bandwidth = peak_bandwidth; 8691 conn->qos_latency = latency; 8692 conn->qos_delay_variation = delay_variation; 8693 hci_run(); 8694 return ERROR_CODE_SUCCESS; 8695 } 8696 8697 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8698 hci_stack->new_page_scan_interval = page_scan_interval; 8699 hci_stack->new_page_scan_window = page_scan_window; 8700 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8701 hci_run(); 8702 } 8703 8704 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8705 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8706 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8707 hci_run(); 8708 } 8709 8710 void gap_set_page_timeout(uint16_t page_timeout){ 8711 hci_stack->page_timeout = page_timeout; 8712 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8713 hci_run(); 8714 } 8715 8716 #endif 8717 8718 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8719 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8720 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8721 if (le_device_db_index >= le_device_db_max_count()) return; 8722 uint8_t offset = le_device_db_index >> 3; 8723 uint8_t mask = 1 << (le_device_db_index & 7); 8724 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8725 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8726 // note: go back to remove entries, otherwise, a remove + add will skip the add 8727 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8728 } 8729 } 8730 8731 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8732 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8733 if (le_device_db_index >= le_device_db_max_count()) return; 8734 uint8_t offset = le_device_db_index >> 3; 8735 uint8_t mask = 1 << (le_device_db_index & 7); 8736 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8737 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8738 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8739 } 8740 } 8741 8742 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8743 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8744 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8745 } 8746 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8747 // restart le resolving list update 8748 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8749 } 8750 return ERROR_CODE_SUCCESS; 8751 } 8752 #endif 8753 8754 #ifdef ENABLE_BLE 8755 #ifdef ENABLE_LE_CENTRAL 8756 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8757 8758 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8759 // check if already in list 8760 btstack_linked_list_iterator_t it; 8761 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8762 while (btstack_linked_list_iterator_has_next(&it)) { 8763 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8764 if (entry->sid != advertising_sid) { 8765 continue; 8766 } 8767 if (entry->address_type != address_type) { 8768 continue; 8769 } 8770 if (memcmp(entry->address, address, 6) != 0) { 8771 continue; 8772 } 8773 // disallow if already scheduled to add 8774 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8775 return ERROR_CODE_COMMAND_DISALLOWED; 8776 } 8777 // still on controller, but scheduled to remove -> re-add 8778 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8779 return ERROR_CODE_SUCCESS; 8780 } 8781 // alloc and add to list 8782 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8783 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8784 entry->sid = advertising_sid; 8785 entry->address_type = address_type; 8786 (void)memcpy(entry->address, address, 6); 8787 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8788 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8789 return ERROR_CODE_SUCCESS; 8790 } 8791 8792 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8793 btstack_linked_list_iterator_t it; 8794 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8795 while (btstack_linked_list_iterator_has_next(&it)){ 8796 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8797 if (entry->sid != advertising_sid) { 8798 continue; 8799 } 8800 if (entry->address_type != address_type) { 8801 continue; 8802 } 8803 if (memcmp(entry->address, address, 6) != 0) { 8804 continue; 8805 } 8806 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8807 // remove from controller if already present 8808 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8809 } else { 8810 // directly remove entry from whitelist 8811 btstack_linked_list_iterator_remove(&it); 8812 btstack_memory_periodic_advertiser_list_entry_free(entry); 8813 } 8814 return ERROR_CODE_SUCCESS; 8815 } 8816 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8817 } 8818 8819 static void hci_periodic_advertiser_list_clear(void){ 8820 btstack_linked_list_iterator_t it; 8821 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8822 while (btstack_linked_list_iterator_has_next(&it)){ 8823 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8824 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8825 // remove from controller if already present 8826 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8827 continue; 8828 } 8829 // directly remove entry from whitelist 8830 btstack_linked_list_iterator_remove(&it); 8831 btstack_memory_periodic_advertiser_list_entry_free(entry); 8832 } 8833 } 8834 8835 // free all entries unconditionally 8836 static void hci_periodic_advertiser_list_free(void){ 8837 btstack_linked_list_iterator_t lit; 8838 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8839 while (btstack_linked_list_iterator_has_next(&lit)){ 8840 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8841 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8842 btstack_memory_periodic_advertiser_list_entry_free(entry); 8843 } 8844 } 8845 8846 uint8_t gap_periodic_advertiser_list_clear(void){ 8847 hci_periodic_advertiser_list_clear(); 8848 hci_run(); 8849 return ERROR_CODE_SUCCESS; 8850 } 8851 8852 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8853 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8854 if (status){ 8855 return status; 8856 } 8857 hci_run(); 8858 return ERROR_CODE_SUCCESS; 8859 } 8860 8861 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8862 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8863 if (status){ 8864 return status; 8865 } 8866 hci_run(); 8867 return ERROR_CODE_SUCCESS; 8868 } 8869 8870 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8871 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8872 // abort if already active 8873 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8874 return ERROR_CODE_COMMAND_DISALLOWED; 8875 } 8876 // store request 8877 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8878 hci_stack->le_periodic_sync_options = options; 8879 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8880 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8881 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8882 hci_stack->le_periodic_sync_skip = skip; 8883 hci_stack->le_periodic_sync_timeout = sync_timeout; 8884 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8885 8886 hci_run(); 8887 return ERROR_CODE_SUCCESS; 8888 } 8889 8890 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8891 // abort if not requested 8892 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8893 return ERROR_CODE_COMMAND_DISALLOWED; 8894 } 8895 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8896 hci_run(); 8897 return ERROR_CODE_SUCCESS; 8898 } 8899 8900 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8901 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8902 return ERROR_CODE_COMMAND_DISALLOWED; 8903 } 8904 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8905 hci_run(); 8906 return ERROR_CODE_SUCCESS; 8907 } 8908 8909 #endif 8910 #endif 8911 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8912 static uint8_t hci_iso_stream_create(hci_con_handle_t con_handle, uint8_t big_handle) { 8913 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8914 if (iso_stream == NULL){ 8915 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8916 } else { 8917 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8918 iso_stream->con_handle = con_handle; 8919 iso_stream->big_handle = big_handle; 8920 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8921 return ERROR_CODE_SUCCESS; 8922 } 8923 } 8924 8925 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 8926 btstack_linked_list_iterator_t it; 8927 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8928 while (btstack_linked_list_iterator_has_next(&it)){ 8929 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8930 if (iso_stream->con_handle == con_handle ) { 8931 return iso_stream; 8932 } 8933 } 8934 return NULL; 8935 } 8936 8937 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8938 log_info("hci_iso_stream_finalize con_handle 0x%04x, big_handle 0x%02x", iso_stream->con_handle, iso_stream->big_handle); 8939 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8940 btstack_memory_hci_iso_stream_free(iso_stream); 8941 } 8942 8943 static void hci_iso_stream_requested_finalize(uint8_t big_handle) { 8944 btstack_linked_list_iterator_t it; 8945 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8946 while (btstack_linked_list_iterator_has_next(&it)){ 8947 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8948 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 8949 (iso_stream->big_handle == big_handle)){ 8950 btstack_linked_list_iterator_remove(&it); 8951 btstack_memory_hci_iso_stream_free(iso_stream); 8952 } 8953 } 8954 } 8955 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 8956 btstack_linked_list_iterator_t it; 8957 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8958 while (btstack_linked_list_iterator_has_next(&it)){ 8959 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8960 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8961 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8962 } 8963 } 8964 } 8965 8966 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8967 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8968 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8969 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8970 return (sdu_len_offset + 2 + sdu_len) == size; 8971 } 8972 8973 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8974 if (hci_stack->iso_packet_handler == NULL) { 8975 return; 8976 } 8977 if (size < 4) { 8978 return; 8979 } 8980 8981 // parse header 8982 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8983 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8984 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8985 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 8986 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8987 8988 // assert packet is complete 8989 if ((iso_data_len + 4u) != size){ 8990 return; 8991 } 8992 8993 if ((pb_flag & 0x01) == 0){ 8994 if (pb_flag == 0x02){ 8995 // The ISO_Data_Load field contains a header and a complete SDU. 8996 if (hci_iso_sdu_complete(packet, size)) { 8997 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 8998 } 8999 } else { 9000 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9001 if (iso_stream == NULL){ 9002 return; 9003 } 9004 if (size > HCI_ISO_PAYLOAD_SIZE){ 9005 return; 9006 } 9007 memcpy(iso_stream->reassembly_buffer, packet, size); 9008 // fix pb_flag 9009 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9010 iso_stream->reassembly_pos = size; 9011 } 9012 } else { 9013 // iso_data_load contains continuation or last fragment of an SDU 9014 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9015 if (ts_flag != 0){ 9016 return; 9017 } 9018 // append fragment 9019 if (iso_stream == NULL){ 9020 return; 9021 } 9022 if (iso_stream->reassembly_pos == 0){ 9023 return; 9024 } 9025 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9026 // reset reassembly buffer 9027 iso_stream->reassembly_pos = 0; 9028 return; 9029 } 9030 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9031 iso_stream->reassembly_pos += iso_data_len; 9032 9033 // deliver if last fragment and SDU complete 9034 if (pb_flag == 0x03){ 9035 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9036 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9037 } 9038 iso_stream->reassembly_pos = 0; 9039 } 9040 } 9041 } 9042 9043 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9044 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9045 uint16_t pos = 0; 9046 event[pos++] = HCI_EVENT_META_GAP; 9047 event[pos++] = 4 + (2 * big->num_bis); 9048 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9049 event[pos++] = status; 9050 event[pos++] = big->big_handle; 9051 event[pos++] = big->num_bis; 9052 uint8_t i; 9053 for (i=0;i<big->num_bis;i++){ 9054 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9055 pos += 2; 9056 } 9057 hci_emit_event(event, pos, 0); 9058 } 9059 9060 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9061 uint8_t event [4]; 9062 uint16_t pos = 0; 9063 event[pos++] = HCI_EVENT_META_GAP; 9064 event[pos++] = 2; 9065 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9066 event[pos++] = big->big_handle; 9067 hci_emit_event(event, pos, 0); 9068 } 9069 9070 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9071 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9072 uint16_t pos = 0; 9073 event[pos++] = HCI_EVENT_META_GAP; 9074 event[pos++] = 4; 9075 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9076 event[pos++] = status; 9077 event[pos++] = big_sync->big_handle; 9078 event[pos++] = big_sync->num_bis; 9079 uint8_t i; 9080 for (i=0;i<big_sync->num_bis;i++){ 9081 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9082 pos += 2; 9083 } 9084 hci_emit_event(event, pos, 0); 9085 } 9086 9087 static void hci_emit_big_sync_stopped(const le_audio_big_sync_t * big_sync){ 9088 uint8_t event [4]; 9089 uint16_t pos = 0; 9090 event[pos++] = HCI_EVENT_META_GAP; 9091 event[pos++] = 2; 9092 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9093 event[pos++] = big_sync->big_handle; 9094 hci_emit_event(event, pos, 0); 9095 } 9096 9097 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9098 uint8_t event[6]; 9099 uint16_t pos = 0; 9100 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9101 event[pos++] = sizeof(event) - 2; 9102 event[pos++] = big->big_handle; 9103 event[pos++] = bis_index; 9104 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9105 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9106 } 9107 9108 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9109 btstack_linked_list_iterator_t it; 9110 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9111 while (btstack_linked_list_iterator_has_next(&it)){ 9112 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9113 if ( big->big_handle == big_handle ) { 9114 return big; 9115 } 9116 } 9117 return NULL; 9118 } 9119 9120 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9121 btstack_linked_list_iterator_t it; 9122 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9123 while (btstack_linked_list_iterator_has_next(&it)){ 9124 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9125 if ( big_sync->big_handle == big_handle ) { 9126 return big_sync; 9127 } 9128 } 9129 return NULL; 9130 } 9131 9132 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9133 hci_stack->iso_packets_to_queue = num_packets; 9134 } 9135 9136 static void hci_iso_notify_can_send_now(void){ 9137 btstack_linked_list_iterator_t it; 9138 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9139 while (btstack_linked_list_iterator_has_next(&it)){ 9140 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9141 // track number completed packet timestamps 9142 if (big->num_completed_timestamp_current_valid){ 9143 big->num_completed_timestamp_current_valid = false; 9144 if (big->num_completed_timestamp_previous_valid){ 9145 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9146 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9147 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9148 big->num_completed_timestamp_previous_ms); 9149 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9150 // to catch up, skip packet on all BIS 9151 uint8_t i; 9152 for (i=0;i<big->num_bis;i++){ 9153 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9154 if (iso_stream){ 9155 iso_stream->num_packets_to_skip++; 9156 } 9157 } 9158 } 9159 } 9160 big->num_completed_timestamp_previous_valid = true; 9161 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9162 } 9163 9164 if (big->can_send_now_requested){ 9165 // check if no outgoing iso packets pending and no can send now have to be emitted 9166 uint8_t i; 9167 bool can_send = true; 9168 uint8_t num_iso_queued_minimum = 0; 9169 for (i=0;i<big->num_bis;i++){ 9170 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9171 if (iso_stream == NULL) continue; 9172 // handle case where individual ISO packet was sent too late: 9173 // for each additionally queued packet, a new one needs to get skipped 9174 if (i==0){ 9175 num_iso_queued_minimum = iso_stream->num_packets_sent; 9176 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9177 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9178 iso_stream->num_packets_to_skip += num_packets_to_skip; 9179 iso_stream->num_packets_sent -= num_packets_to_skip; 9180 } 9181 // check if we can send now 9182 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9183 can_send = false; 9184 break; 9185 } 9186 } 9187 if (can_send){ 9188 // propagate can send now to individual streams 9189 big->can_send_now_requested = false; 9190 for (i=0;i<big->num_bis;i++){ 9191 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9192 iso_stream->emit_ready_to_send = true; 9193 } 9194 } 9195 } 9196 } 9197 9198 if (hci_stack->hci_packet_buffer_reserved) return; 9199 9200 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9201 while (btstack_linked_list_iterator_has_next(&it)){ 9202 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9203 // report bis ready 9204 uint8_t i; 9205 for (i=0;i<big->num_bis;i++){ 9206 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9207 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9208 iso_stream->emit_ready_to_send = false; 9209 hci_emit_bis_can_send_now(big, i); 9210 break; 9211 } 9212 } 9213 } 9214 } 9215 9216 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9217 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9218 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9219 } 9220 if (big_params->num_bis == 0){ 9221 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9222 } 9223 if (big_params->num_bis > MAX_NR_BIS){ 9224 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9225 } 9226 9227 // reserve ISO Streams 9228 uint8_t i; 9229 uint8_t status = ERROR_CODE_SUCCESS; 9230 for (i=0;i<big_params->num_bis;i++){ 9231 status = hci_iso_stream_create(HCI_CON_HANDLE_INVALID, big_params->big_handle); 9232 if (status != ERROR_CODE_SUCCESS) { 9233 break; 9234 } 9235 } 9236 9237 // free structs on error 9238 if (status != ERROR_CODE_SUCCESS){ 9239 hci_iso_stream_requested_finalize(big_params->big_handle); 9240 return status; 9241 } 9242 9243 le_audio_big_t * big = storage; 9244 big->big_handle = big_params->big_handle; 9245 big->params = big_params; 9246 big->state = LE_AUDIO_BIG_STATE_CREATE; 9247 big->num_bis = big_params->num_bis; 9248 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9249 9250 hci_run(); 9251 9252 return ERROR_CODE_SUCCESS; 9253 } 9254 9255 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9256 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9257 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9258 } 9259 if (big_sync_params->num_bis == 0){ 9260 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9261 } 9262 if (big_sync_params->num_bis > MAX_NR_BIS){ 9263 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9264 } 9265 9266 le_audio_big_sync_t * big_sync = storage; 9267 big_sync->big_handle = big_sync_params->big_handle; 9268 big_sync->params = big_sync_params; 9269 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9270 big_sync->num_bis = big_sync_params->num_bis; 9271 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9272 9273 hci_run(); 9274 9275 return ERROR_CODE_SUCCESS; 9276 } 9277 9278 uint8_t gap_big_terminate(uint8_t big_handle){ 9279 le_audio_big_t * big = hci_big_for_handle(big_handle); 9280 if (big == NULL){ 9281 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9282 } 9283 switch (big->state){ 9284 case LE_AUDIO_BIG_STATE_CREATE: 9285 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9286 hci_emit_big_terminated(big); 9287 break; 9288 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9289 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9290 break; 9291 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9292 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9293 case LE_AUDIO_BIG_STATE_ACTIVE: 9294 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9295 hci_run(); 9296 break; 9297 default: 9298 return ERROR_CODE_COMMAND_DISALLOWED; 9299 } 9300 return ERROR_CODE_SUCCESS; 9301 } 9302 9303 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9304 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9305 if (big_sync == NULL){ 9306 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9307 } 9308 switch (big_sync->state){ 9309 case LE_AUDIO_BIG_STATE_CREATE: 9310 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9311 hci_emit_big_sync_stopped(big_sync); 9312 break; 9313 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9314 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9315 break; 9316 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9317 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9318 case LE_AUDIO_BIG_STATE_ACTIVE: 9319 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9320 hci_run(); 9321 break; 9322 default: 9323 return ERROR_CODE_COMMAND_DISALLOWED; 9324 } 9325 return ERROR_CODE_SUCCESS; 9326 } 9327 9328 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9329 le_audio_big_t * big = hci_big_for_handle(big_handle); 9330 if (big == NULL){ 9331 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9332 } 9333 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9334 return ERROR_CODE_COMMAND_DISALLOWED; 9335 } 9336 big->can_send_now_requested = true; 9337 hci_iso_notify_can_send_now(); 9338 return ERROR_CODE_SUCCESS; 9339 } 9340 #endif 9341 #endif /* ENABLE_BLE */ 9342 9343 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9344 void hci_setup_test_connections_fuzz(void){ 9345 hci_connection_t * conn; 9346 9347 // default address: 66:55:44:33:00:01 9348 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9349 9350 // setup Controller info 9351 hci_stack->num_cmd_packets = 255; 9352 hci_stack->acl_packets_total_num = 255; 9353 9354 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9355 addr[5] = 0x01; 9356 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9357 conn->con_handle = addr[5]; 9358 conn->role = HCI_ROLE_SLAVE; 9359 conn->state = RECEIVED_CONNECTION_REQUEST; 9360 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9361 9362 // setup incoming Classic SCO connection with con handle 0x0002 9363 addr[5] = 0x02; 9364 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9365 conn->con_handle = addr[5]; 9366 conn->role = HCI_ROLE_SLAVE; 9367 conn->state = RECEIVED_CONNECTION_REQUEST; 9368 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9369 9370 // setup ready Classic ACL connection with con handle 0x0003 9371 addr[5] = 0x03; 9372 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9373 conn->con_handle = addr[5]; 9374 conn->role = HCI_ROLE_SLAVE; 9375 conn->state = OPEN; 9376 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9377 9378 // setup ready Classic SCO connection with con handle 0x0004 9379 addr[5] = 0x04; 9380 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9381 conn->con_handle = addr[5]; 9382 conn->role = HCI_ROLE_SLAVE; 9383 conn->state = OPEN; 9384 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9385 9386 // setup ready LE ACL connection with con handle 0x005 and public address 9387 addr[5] = 0x05; 9388 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9389 conn->con_handle = addr[5]; 9390 conn->role = HCI_ROLE_SLAVE; 9391 conn->state = OPEN; 9392 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9393 conn->sm_connection.sm_connection_encrypted = 1; 9394 } 9395 9396 void hci_free_connections_fuzz(void){ 9397 btstack_linked_list_iterator_t it; 9398 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9399 while (btstack_linked_list_iterator_has_next(&it)){ 9400 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9401 btstack_linked_list_iterator_remove(&it); 9402 btstack_memory_hci_connection_free(con); 9403 } 9404 } 9405 void hci_simulate_working_fuzz(void){ 9406 hci_stack->le_scanning_param_update = false; 9407 hci_init_done(); 9408 hci_stack->num_cmd_packets = 255; 9409 } 9410 #endif 9411