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 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 3882 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 3883 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 3884 break; 3885 #endif 3886 #endif 3887 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3888 event_handle_le_connection_complete(packet); 3889 break; 3890 3891 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3892 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3893 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3894 conn = hci_connection_for_handle(handle); 3895 if (!conn) break; 3896 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3897 break; 3898 3899 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3900 // connection 3901 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3902 conn = hci_connection_for_handle(handle); 3903 if (conn) { 3904 // read arguments 3905 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3906 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3907 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3908 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3909 3910 // validate against current connection parameter range 3911 le_connection_parameter_range_t existing_range; 3912 gap_get_connection_parameter_range(&existing_range); 3913 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3914 if (update_parameter){ 3915 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3916 conn->le_conn_interval_min = le_conn_interval_min; 3917 conn->le_conn_interval_max = le_conn_interval_max; 3918 conn->le_conn_latency = le_conn_latency; 3919 conn->le_supervision_timeout = le_supervision_timeout; 3920 } else { 3921 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3922 } 3923 } 3924 break; 3925 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3926 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3927 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3928 conn = hci_connection_for_handle(handle); 3929 if (conn) { 3930 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3931 } 3932 break; 3933 #endif 3934 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3935 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3936 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3937 iso_stream = hci_iso_stream_for_con_handle(handle); 3938 if (iso_stream){ 3939 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3940 if (status == ERROR_CODE_SUCCESS){ 3941 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3942 } else { 3943 hci_iso_stream_finalize(iso_stream); 3944 } 3945 } 3946 break; 3947 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 3948 big = hci_big_for_handle(packet[4]); 3949 if (big != NULL){ 3950 uint8_t status = packet[3]; 3951 if (status == ERROR_CODE_SUCCESS){ 3952 // store bis_con_handles and trigger iso path setup 3953 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 3954 uint8_t i; 3955 for (i=0;i<num_bis;i++){ 3956 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 3957 big->bis_con_handles[i] = bis_handle; 3958 // assign bis handle 3959 btstack_linked_list_iterator_t it; 3960 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3961 while (btstack_linked_list_iterator_has_next(&it)){ 3962 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3963 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 3964 (iso_stream->big_handle == big->big_handle)){ 3965 iso_stream->con_handle = bis_handle; 3966 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3967 break; 3968 } 3969 } 3970 } 3971 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 3972 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 3973 big->state_vars.next_bis = 0; 3974 } 3975 } else { 3976 // create BIG failed or has been stopped by us 3977 hci_iso_stream_requested_finalize(big->big_handle); 3978 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3979 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 3980 hci_emit_big_created(big, status); 3981 } else { 3982 hci_emit_big_terminated(big); 3983 } 3984 } 3985 } 3986 break; 3987 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 3988 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 3989 if (big != NULL){ 3990 // finalize associated ISO streams 3991 btstack_linked_list_iterator_t it; 3992 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3993 while (btstack_linked_list_iterator_has_next(&it)){ 3994 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3995 if (iso_stream->big_handle == big->big_handle){ 3996 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->big_handle, iso_stream->con_handle); 3997 btstack_linked_list_iterator_remove(&it); 3998 btstack_memory_hci_iso_stream_free(iso_stream); 3999 } 4000 } 4001 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4002 switch (big->state){ 4003 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4004 hci_emit_big_created(big, big->state_vars.status); 4005 break; 4006 default: 4007 hci_emit_big_terminated(big); 4008 break; 4009 } 4010 } 4011 break; 4012 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4013 big_sync = hci_big_sync_for_handle(packet[4]); 4014 if (big_sync != NULL){ 4015 uint8_t status = packet[3]; 4016 if (status == ERROR_CODE_SUCCESS){ 4017 // store bis_con_handles and trigger iso path setup 4018 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4019 uint8_t i; 4020 for (i=0;i<num_bis;i++){ 4021 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4022 } 4023 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4024 // trigger iso path setup 4025 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4026 big_sync->state_vars.next_bis = 0; 4027 } 4028 } else { 4029 // create BIG Sync failed or has been stopped by us 4030 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4031 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4032 hci_emit_big_sync_created(big_sync, status); 4033 } else { 4034 hci_emit_big_sync_stopped(big_sync); 4035 } 4036 } 4037 } 4038 break; 4039 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4040 big_sync = hci_big_sync_for_handle(packet[4]); 4041 if (big_sync != NULL){ 4042 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4043 hci_emit_big_sync_stopped(big_sync); 4044 } 4045 break; 4046 #endif 4047 default: 4048 break; 4049 } 4050 break; 4051 #endif 4052 case HCI_EVENT_VENDOR_SPECIFIC: 4053 // Vendor specific commands often create vendor specific event instead of num completed packets 4054 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4055 switch (hci_stack->manufacturer){ 4056 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4057 hci_stack->num_cmd_packets = 1; 4058 break; 4059 default: 4060 break; 4061 } 4062 break; 4063 default: 4064 break; 4065 } 4066 4067 handle_event_for_current_stack_state(packet, size); 4068 4069 // notify upper stack 4070 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4071 4072 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4073 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4074 handle = little_endian_read_16(packet, 3); 4075 hci_connection_t * aConn = hci_connection_for_handle(handle); 4076 // discard connection if app did not trigger a reconnect in the event handler 4077 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4078 hci_shutdown_connection(aConn); 4079 } 4080 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4081 hci_controller_dump_packets(); 4082 #endif 4083 } 4084 4085 // execute main loop 4086 hci_run(); 4087 } 4088 4089 #ifdef ENABLE_CLASSIC 4090 4091 #ifdef ENABLE_SCO_OVER_HCI 4092 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4093 static void sco_schedule_tx(hci_connection_t * conn); 4094 4095 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4096 log_debug("SCO TX Timeout"); 4097 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4098 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4099 if (!conn) return; 4100 4101 // trigger send 4102 conn->sco_tx_ready = 1; 4103 // extra packet if CVSD but SCO buffer is too short 4104 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4105 conn->sco_tx_ready++; 4106 } 4107 hci_notify_if_sco_can_send_now(); 4108 } 4109 4110 4111 #define SCO_TX_AFTER_RX_MS (6) 4112 4113 static void sco_schedule_tx(hci_connection_t * conn){ 4114 4115 uint32_t now = btstack_run_loop_get_time_ms(); 4116 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4117 int time_delta_ms = sco_tx_ms - now; 4118 4119 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4120 4121 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4122 btstack_run_loop_remove_timer(timer); 4123 btstack_run_loop_set_timer(timer, time_delta_ms); 4124 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4125 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4126 btstack_run_loop_add_timer(timer); 4127 } 4128 #endif 4129 4130 static void sco_handler(uint8_t * packet, uint16_t size){ 4131 // lookup connection struct 4132 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4133 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4134 if (!conn) return; 4135 4136 #ifdef ENABLE_SCO_OVER_HCI 4137 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4138 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4139 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4140 packet[2] = 0x3c; 4141 memmove(&packet[3], &packet[23], 63); 4142 size = 63; 4143 } 4144 } 4145 4146 if (hci_have_usb_transport()){ 4147 // Nothing to do 4148 } else { 4149 // 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); 4150 if (hci_stack->synchronous_flow_control_enabled == 0){ 4151 uint32_t now = btstack_run_loop_get_time_ms(); 4152 4153 if (!conn->sco_rx_valid){ 4154 // ignore first 10 packets 4155 conn->sco_rx_count++; 4156 // log_debug("sco rx count %u", conn->sco_rx_count); 4157 if (conn->sco_rx_count == 10) { 4158 // use first timestamp as is and pretent it just started 4159 conn->sco_rx_ms = now; 4160 conn->sco_rx_valid = 1; 4161 conn->sco_rx_count = 0; 4162 sco_schedule_tx(conn); 4163 } 4164 } else { 4165 // track expected arrival timme 4166 conn->sco_rx_count++; 4167 conn->sco_rx_ms += 7; 4168 int delta = (int32_t) (now - conn->sco_rx_ms); 4169 if (delta > 0){ 4170 conn->sco_rx_ms++; 4171 } 4172 // log_debug("sco rx %u", conn->sco_rx_ms); 4173 sco_schedule_tx(conn); 4174 } 4175 } 4176 } 4177 #endif 4178 4179 // deliver to app 4180 if (hci_stack->sco_packet_handler) { 4181 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4182 } 4183 4184 #ifdef HAVE_SCO_TRANSPORT 4185 // We can send one packet for each received packet 4186 conn->sco_tx_ready++; 4187 hci_notify_if_sco_can_send_now(); 4188 #endif 4189 4190 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4191 conn->num_packets_completed++; 4192 hci_stack->host_completed_packets = 1; 4193 hci_run(); 4194 #endif 4195 } 4196 #endif 4197 4198 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4199 hci_dump_packet(packet_type, 1, packet, size); 4200 switch (packet_type) { 4201 case HCI_EVENT_PACKET: 4202 event_handler(packet, size); 4203 break; 4204 case HCI_ACL_DATA_PACKET: 4205 acl_handler(packet, size); 4206 break; 4207 #ifdef ENABLE_CLASSIC 4208 case HCI_SCO_DATA_PACKET: 4209 sco_handler(packet, size); 4210 break; 4211 #endif 4212 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4213 case HCI_ISO_DATA_PACKET: 4214 hci_iso_packet_handler(packet, size); 4215 break; 4216 #endif 4217 default: 4218 break; 4219 } 4220 } 4221 4222 /** 4223 * @brief Add event packet handler. 4224 */ 4225 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4226 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4227 } 4228 4229 /** 4230 * @brief Remove event packet handler. 4231 */ 4232 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4233 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4234 } 4235 4236 /** Register HCI packet handlers */ 4237 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4238 hci_stack->acl_packet_handler = handler; 4239 } 4240 4241 #ifdef ENABLE_CLASSIC 4242 /** 4243 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4244 */ 4245 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4246 hci_stack->sco_packet_handler = handler; 4247 } 4248 #endif 4249 4250 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4251 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4252 hci_stack->iso_packet_handler = handler; 4253 } 4254 #endif 4255 4256 static void hci_state_reset(void){ 4257 // no connections yet 4258 hci_stack->connections = NULL; 4259 4260 // keep discoverable/connectable as this has been requested by the client(s) 4261 // hci_stack->discoverable = 0; 4262 // hci_stack->connectable = 0; 4263 // hci_stack->bondable = 1; 4264 // hci_stack->own_addr_type = 0; 4265 4266 // buffer is free 4267 hci_stack->hci_packet_buffer_reserved = false; 4268 4269 // no pending cmds 4270 hci_stack->decline_reason = 0; 4271 4272 hci_stack->secure_connections_active = false; 4273 4274 #ifdef ENABLE_CLASSIC 4275 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4276 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4277 4278 hci_stack->gap_tasks_classic = 4279 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4280 GAP_TASK_SET_CLASS_OF_DEVICE | 4281 GAP_TASK_SET_LOCAL_NAME | 4282 GAP_TASK_SET_EIR_DATA | 4283 GAP_TASK_WRITE_SCAN_ENABLE | 4284 GAP_TASK_WRITE_PAGE_TIMEOUT; 4285 #endif 4286 4287 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4288 hci_stack->classic_read_local_oob_data = false; 4289 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4290 #endif 4291 4292 // LE 4293 #ifdef ENABLE_BLE 4294 memset(hci_stack->le_random_address, 0, 6); 4295 hci_stack->le_random_address_set = 0; 4296 #endif 4297 #ifdef ENABLE_LE_CENTRAL 4298 hci_stack->le_scanning_active = false; 4299 hci_stack->le_scanning_param_update = true; 4300 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4301 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4302 hci_stack->le_whitelist_capacity = 0; 4303 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4304 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4305 #endif 4306 #endif 4307 #ifdef ENABLE_LE_PERIPHERAL 4308 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4309 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4310 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4311 } 4312 if (hci_stack->le_advertisements_data != NULL){ 4313 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4314 } 4315 #endif 4316 } 4317 4318 #ifdef ENABLE_CLASSIC 4319 /** 4320 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4321 */ 4322 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4323 // store and open remote device db 4324 hci_stack->link_key_db = link_key_db; 4325 if (hci_stack->link_key_db) { 4326 hci_stack->link_key_db->open(); 4327 } 4328 } 4329 #endif 4330 4331 void hci_init(const hci_transport_t *transport, const void *config){ 4332 4333 #ifdef HAVE_MALLOC 4334 if (!hci_stack) { 4335 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4336 } 4337 #else 4338 hci_stack = &hci_stack_static; 4339 #endif 4340 memset(hci_stack, 0, sizeof(hci_stack_t)); 4341 4342 // reference to use transport layer implementation 4343 hci_stack->hci_transport = transport; 4344 4345 // reference to used config 4346 hci_stack->config = config; 4347 4348 // setup pointer for outgoing packet buffer 4349 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4350 4351 // max acl payload size defined in config.h 4352 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4353 4354 // register packet handlers with transport 4355 transport->register_packet_handler(&packet_handler); 4356 4357 hci_stack->state = HCI_STATE_OFF; 4358 4359 // class of device 4360 hci_stack->class_of_device = 0x007a020c; // Smartphone 4361 4362 // bondable by default 4363 hci_stack->bondable = 1; 4364 4365 #ifdef ENABLE_CLASSIC 4366 // classic name 4367 hci_stack->local_name = default_classic_name; 4368 4369 // Master slave policy 4370 hci_stack->master_slave_policy = 1; 4371 4372 // Allow Role Switch 4373 hci_stack->allow_role_switch = 1; 4374 4375 // Default / minimum security level = 2 4376 hci_stack->gap_security_level = LEVEL_2; 4377 4378 // Default Security Mode 4 4379 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4380 4381 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4382 hci_stack->gap_required_encyrption_key_size = 7; 4383 4384 // Link Supervision Timeout 4385 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4386 4387 #endif 4388 4389 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4390 hci_stack->ssp_enable = 1; 4391 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4392 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4393 hci_stack->ssp_auto_accept = 1; 4394 4395 // Secure Connections: enable (requires support from Controller) 4396 hci_stack->secure_connections_enable = true; 4397 4398 // voice setting - signed 16 bit pcm data with CVSD over the air 4399 hci_stack->sco_voice_setting = 0x60; 4400 4401 #ifdef ENABLE_LE_CENTRAL 4402 // connection parameter to use for outgoing connections 4403 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4404 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4405 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4406 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4407 hci_stack->le_connection_latency = 4; // 4 4408 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4409 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4410 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4411 4412 // default LE Scanning 4413 hci_stack->le_scan_type = 0x1; // active 4414 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4415 hci_stack->le_scan_window = 0x30; // 30 ms 4416 #endif 4417 4418 #ifdef ENABLE_LE_PERIPHERAL 4419 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4420 #endif 4421 4422 // connection parameter range used to answer connection parameter update requests in l2cap 4423 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4424 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4425 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4426 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4427 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4428 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4429 4430 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4431 hci_stack->iso_packets_to_queue = 1; 4432 #endif 4433 4434 hci_state_reset(); 4435 } 4436 4437 void hci_deinit(void){ 4438 btstack_run_loop_remove_timer(&hci_stack->timeout); 4439 #ifdef HAVE_MALLOC 4440 if (hci_stack) { 4441 free(hci_stack); 4442 } 4443 #endif 4444 hci_stack = NULL; 4445 4446 #ifdef ENABLE_CLASSIC 4447 disable_l2cap_timeouts = 0; 4448 #endif 4449 } 4450 4451 /** 4452 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4453 */ 4454 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4455 hci_stack->chipset = chipset_driver; 4456 4457 // reset chipset driver - init is also called on power_up 4458 if (hci_stack->chipset && hci_stack->chipset->init){ 4459 hci_stack->chipset->init(hci_stack->config); 4460 } 4461 } 4462 4463 /** 4464 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4465 */ 4466 void hci_set_control(const btstack_control_t *hardware_control){ 4467 // references to used control implementation 4468 hci_stack->control = hardware_control; 4469 // init with transport config 4470 hardware_control->init(hci_stack->config); 4471 } 4472 4473 static void hci_discard_connections(void){ 4474 btstack_linked_list_iterator_t it; 4475 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4476 while (btstack_linked_list_iterator_has_next(&it)){ 4477 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4478 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4479 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4480 hci_shutdown_connection(connection); 4481 } 4482 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4483 while (hci_stack->iso_streams != NULL){ 4484 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4485 } 4486 #endif 4487 } 4488 4489 void hci_close(void){ 4490 4491 #ifdef ENABLE_CLASSIC 4492 // close remote device db 4493 if (hci_stack->link_key_db) { 4494 hci_stack->link_key_db->close(); 4495 } 4496 #endif 4497 4498 hci_discard_connections(); 4499 4500 hci_power_control(HCI_POWER_OFF); 4501 4502 #ifdef HAVE_MALLOC 4503 free(hci_stack); 4504 #endif 4505 hci_stack = NULL; 4506 } 4507 4508 #ifdef HAVE_SCO_TRANSPORT 4509 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4510 hci_stack->sco_transport = sco_transport; 4511 sco_transport->register_packet_handler(&packet_handler); 4512 } 4513 #endif 4514 4515 #ifdef ENABLE_CLASSIC 4516 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4517 // validate ranage and set 4518 if (encryption_key_size < 7) return; 4519 if (encryption_key_size > 16) return; 4520 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4521 } 4522 4523 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4524 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4525 hci_stack->gap_security_mode = security_mode; 4526 return ERROR_CODE_SUCCESS; 4527 } else { 4528 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4529 } 4530 } 4531 4532 gap_security_mode_t gap_get_security_mode(void){ 4533 return hci_stack->gap_security_mode; 4534 } 4535 4536 void gap_set_security_level(gap_security_level_t security_level){ 4537 hci_stack->gap_security_level = security_level; 4538 } 4539 4540 gap_security_level_t gap_get_security_level(void){ 4541 if (hci_stack->gap_secure_connections_only_mode){ 4542 return LEVEL_4; 4543 } 4544 return hci_stack->gap_security_level; 4545 } 4546 4547 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4548 hci_stack->gap_minimal_service_security_level = security_level; 4549 } 4550 4551 void gap_set_secure_connections_only_mode(bool enable){ 4552 hci_stack->gap_secure_connections_only_mode = enable; 4553 } 4554 4555 bool gap_get_secure_connections_only_mode(void){ 4556 return hci_stack->gap_secure_connections_only_mode; 4557 } 4558 #endif 4559 4560 #ifdef ENABLE_CLASSIC 4561 void gap_set_class_of_device(uint32_t class_of_device){ 4562 hci_stack->class_of_device = class_of_device; 4563 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4564 hci_run(); 4565 } 4566 4567 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4568 hci_stack->default_link_policy_settings = default_link_policy_settings; 4569 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4570 hci_run(); 4571 } 4572 4573 void gap_set_allow_role_switch(bool allow_role_switch){ 4574 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4575 } 4576 4577 uint8_t hci_get_allow_role_switch(void){ 4578 return hci_stack->allow_role_switch; 4579 } 4580 4581 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4582 hci_stack->link_supervision_timeout = link_supervision_timeout; 4583 } 4584 4585 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4586 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4587 } 4588 4589 uint16_t hci_automatic_flush_timeout(void){ 4590 return hci_stack->automatic_flush_timeout; 4591 } 4592 4593 void hci_disable_l2cap_timeout_check(void){ 4594 disable_l2cap_timeouts = 1; 4595 } 4596 #endif 4597 4598 #ifndef HAVE_HOST_CONTROLLER_API 4599 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4600 void hci_set_bd_addr(bd_addr_t addr){ 4601 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4602 hci_stack->custom_bd_addr_set = 1; 4603 } 4604 #endif 4605 4606 // State-Module-Driver overview 4607 // state module low-level 4608 // HCI_STATE_OFF off close 4609 // HCI_STATE_INITIALIZING, on open 4610 // HCI_STATE_WORKING, on open 4611 // HCI_STATE_HALTING, on open 4612 // HCI_STATE_SLEEPING, off/sleep close 4613 // HCI_STATE_FALLING_ASLEEP on open 4614 4615 static int hci_power_control_on(void){ 4616 4617 // power on 4618 int err = 0; 4619 if (hci_stack->control && hci_stack->control->on){ 4620 err = (*hci_stack->control->on)(); 4621 } 4622 if (err){ 4623 log_error( "POWER_ON failed"); 4624 hci_emit_hci_open_failed(); 4625 return err; 4626 } 4627 4628 // int chipset driver 4629 if (hci_stack->chipset && hci_stack->chipset->init){ 4630 hci_stack->chipset->init(hci_stack->config); 4631 } 4632 4633 // init transport 4634 if (hci_stack->hci_transport->init){ 4635 hci_stack->hci_transport->init(hci_stack->config); 4636 } 4637 4638 // open transport 4639 err = hci_stack->hci_transport->open(); 4640 if (err){ 4641 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4642 if (hci_stack->control && hci_stack->control->off){ 4643 (*hci_stack->control->off)(); 4644 } 4645 hci_emit_hci_open_failed(); 4646 return err; 4647 } 4648 return 0; 4649 } 4650 4651 static void hci_power_control_off(void){ 4652 4653 log_info("hci_power_control_off"); 4654 4655 // close low-level device 4656 hci_stack->hci_transport->close(); 4657 4658 log_info("hci_power_control_off - hci_transport closed"); 4659 4660 // power off 4661 if (hci_stack->control && hci_stack->control->off){ 4662 (*hci_stack->control->off)(); 4663 } 4664 4665 log_info("hci_power_control_off - control closed"); 4666 4667 hci_stack->state = HCI_STATE_OFF; 4668 } 4669 4670 static void hci_power_control_sleep(void){ 4671 4672 log_info("hci_power_control_sleep"); 4673 4674 #if 0 4675 // don't close serial port during sleep 4676 4677 // close low-level device 4678 hci_stack->hci_transport->close(hci_stack->config); 4679 #endif 4680 4681 // sleep mode 4682 if (hci_stack->control && hci_stack->control->sleep){ 4683 (*hci_stack->control->sleep)(); 4684 } 4685 4686 hci_stack->state = HCI_STATE_SLEEPING; 4687 } 4688 4689 static int hci_power_control_wake(void){ 4690 4691 log_info("hci_power_control_wake"); 4692 4693 // wake on 4694 if (hci_stack->control && hci_stack->control->wake){ 4695 (*hci_stack->control->wake)(); 4696 } 4697 4698 #if 0 4699 // open low-level device 4700 int err = hci_stack->hci_transport->open(hci_stack->config); 4701 if (err){ 4702 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4703 if (hci_stack->control && hci_stack->control->off){ 4704 (*hci_stack->control->off)(); 4705 } 4706 hci_emit_hci_open_failed(); 4707 return err; 4708 } 4709 #endif 4710 4711 return 0; 4712 } 4713 4714 static void hci_power_enter_initializing_state(void){ 4715 // set up state machine 4716 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4717 hci_stack->hci_packet_buffer_reserved = false; 4718 hci_stack->state = HCI_STATE_INITIALIZING; 4719 hci_stack->substate = HCI_INIT_SEND_RESET; 4720 } 4721 4722 static void hci_power_enter_halting_state(void){ 4723 #ifdef ENABLE_BLE 4724 hci_whitelist_free(); 4725 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4726 hci_periodic_advertiser_list_free(); 4727 #endif 4728 #endif 4729 // see hci_run 4730 hci_stack->state = HCI_STATE_HALTING; 4731 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4732 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4733 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4734 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4735 btstack_run_loop_add_timer(&hci_stack->timeout); 4736 } 4737 4738 // returns error 4739 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4740 int err; 4741 switch (power_mode){ 4742 case HCI_POWER_ON: 4743 err = hci_power_control_on(); 4744 if (err != 0) { 4745 log_error("hci_power_control_on() error %d", err); 4746 return err; 4747 } 4748 hci_power_enter_initializing_state(); 4749 break; 4750 case HCI_POWER_OFF: 4751 // do nothing 4752 break; 4753 case HCI_POWER_SLEEP: 4754 // do nothing (with SLEEP == OFF) 4755 break; 4756 default: 4757 btstack_assert(false); 4758 break; 4759 } 4760 return ERROR_CODE_SUCCESS; 4761 } 4762 4763 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4764 switch (power_mode){ 4765 case HCI_POWER_ON: 4766 // do nothing 4767 break; 4768 case HCI_POWER_OFF: 4769 // no connections yet, just turn it off 4770 hci_power_control_off(); 4771 break; 4772 case HCI_POWER_SLEEP: 4773 // no connections yet, just turn it off 4774 hci_power_control_sleep(); 4775 break; 4776 default: 4777 btstack_assert(false); 4778 break; 4779 } 4780 return ERROR_CODE_SUCCESS; 4781 } 4782 4783 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4784 switch (power_mode){ 4785 case HCI_POWER_ON: 4786 // do nothing 4787 break; 4788 case HCI_POWER_OFF: 4789 hci_power_enter_halting_state(); 4790 break; 4791 case HCI_POWER_SLEEP: 4792 // see hci_run 4793 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4794 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4795 break; 4796 default: 4797 btstack_assert(false); 4798 break; 4799 } 4800 return ERROR_CODE_SUCCESS; 4801 } 4802 4803 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4804 switch (power_mode){ 4805 case HCI_POWER_ON: 4806 hci_power_enter_initializing_state(); 4807 break; 4808 case HCI_POWER_OFF: 4809 // do nothing 4810 break; 4811 case HCI_POWER_SLEEP: 4812 // see hci_run 4813 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4814 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4815 break; 4816 default: 4817 btstack_assert(false); 4818 break; 4819 } 4820 return ERROR_CODE_SUCCESS; 4821 } 4822 4823 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4824 switch (power_mode){ 4825 case HCI_POWER_ON: 4826 hci_power_enter_initializing_state(); 4827 break; 4828 case HCI_POWER_OFF: 4829 hci_power_enter_halting_state(); 4830 break; 4831 case HCI_POWER_SLEEP: 4832 // do nothing 4833 break; 4834 default: 4835 btstack_assert(false); 4836 break; 4837 } 4838 return ERROR_CODE_SUCCESS; 4839 } 4840 4841 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4842 int err; 4843 switch (power_mode){ 4844 case HCI_POWER_ON: 4845 err = hci_power_control_wake(); 4846 if (err) return err; 4847 hci_power_enter_initializing_state(); 4848 break; 4849 case HCI_POWER_OFF: 4850 hci_power_enter_halting_state(); 4851 break; 4852 case HCI_POWER_SLEEP: 4853 // do nothing 4854 break; 4855 default: 4856 btstack_assert(false); 4857 break; 4858 } 4859 return ERROR_CODE_SUCCESS; 4860 } 4861 4862 int hci_power_control(HCI_POWER_MODE power_mode){ 4863 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4864 int err = 0; 4865 switch (hci_stack->state){ 4866 case HCI_STATE_OFF: 4867 err = hci_power_control_state_off(power_mode); 4868 break; 4869 case HCI_STATE_INITIALIZING: 4870 err = hci_power_control_state_initializing(power_mode); 4871 break; 4872 case HCI_STATE_WORKING: 4873 err = hci_power_control_state_working(power_mode); 4874 break; 4875 case HCI_STATE_HALTING: 4876 err = hci_power_control_state_halting(power_mode); 4877 break; 4878 case HCI_STATE_FALLING_ASLEEP: 4879 err = hci_power_control_state_falling_asleep(power_mode); 4880 break; 4881 case HCI_STATE_SLEEPING: 4882 err = hci_power_control_state_sleeping(power_mode); 4883 break; 4884 default: 4885 btstack_assert(false); 4886 break; 4887 } 4888 if (err != 0){ 4889 return err; 4890 } 4891 4892 // create internal event 4893 hci_emit_state(); 4894 4895 // trigger next/first action 4896 hci_run(); 4897 4898 return 0; 4899 } 4900 4901 4902 static void hci_halting_run(void) { 4903 4904 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4905 4906 hci_connection_t *connection; 4907 #ifdef ENABLE_BLE 4908 #ifdef ENABLE_LE_PERIPHERAL 4909 bool stop_advertismenets; 4910 #endif 4911 #endif 4912 4913 switch (hci_stack->substate) { 4914 case HCI_HALTING_CLASSIC_STOP: 4915 #ifdef ENABLE_CLASSIC 4916 if (!hci_can_send_command_packet_now()) return; 4917 4918 if (hci_stack->connectable || hci_stack->discoverable){ 4919 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4920 hci_send_cmd(&hci_write_scan_enable, 0); 4921 return; 4922 } 4923 #endif 4924 /* fall through */ 4925 4926 case HCI_HALTING_LE_ADV_STOP: 4927 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4928 4929 #ifdef ENABLE_BLE 4930 #ifdef ENABLE_LE_PERIPHERAL 4931 if (!hci_can_send_command_packet_now()) return; 4932 4933 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4934 4935 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4936 if (hci_extended_advertising_supported()){ 4937 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4938 btstack_linked_list_iterator_t it; 4939 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4940 // stop all periodic advertisements and check if an extended set is active 4941 while (btstack_linked_list_iterator_has_next(&it)){ 4942 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4943 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4944 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4945 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4946 return; 4947 } 4948 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4949 stop_advertismenets = true; 4950 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4951 } 4952 } 4953 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4954 if (stop_advertismenets){ 4955 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4956 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4957 return; 4958 } 4959 } 4960 else 4961 #else /* ENABLE_LE_PERIPHERAL */ 4962 { 4963 if (stop_advertismenets) { 4964 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4965 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4966 return; 4967 } 4968 } 4969 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4970 #endif /* ENABLE_LE_PERIPHERAL */ 4971 #endif /* ENABLE_BLE */ 4972 4973 /* fall through */ 4974 4975 case HCI_HALTING_LE_SCAN_STOP: 4976 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4977 if (!hci_can_send_command_packet_now()) return; 4978 4979 #ifdef ENABLE_BLE 4980 #ifdef ENABLE_LE_CENTRAL 4981 if (hci_stack->le_scanning_active){ 4982 hci_le_scan_stop(); 4983 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4984 return; 4985 } 4986 #endif 4987 #endif 4988 4989 /* fall through */ 4990 4991 case HCI_HALTING_DISCONNECT_ALL: 4992 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4993 if (!hci_can_send_command_packet_now()) return; 4994 4995 // close all open connections 4996 connection = (hci_connection_t *) hci_stack->connections; 4997 if (connection) { 4998 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4999 5000 // check state 5001 if (connection->state == SENT_DISCONNECT) return; 5002 connection->state = SENT_DISCONNECT; 5003 5004 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5005 5006 // finally, send the disconnect command 5007 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5008 return; 5009 } 5010 5011 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5012 // stop BIGs and BIG Syncs 5013 if (hci_stack->le_audio_bigs != NULL){ 5014 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5015 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5016 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5017 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5018 return; 5019 } 5020 if (hci_stack->le_audio_big_syncs != NULL){ 5021 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5022 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5023 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5024 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5025 return; 5026 } 5027 #endif 5028 5029 btstack_run_loop_remove_timer(&hci_stack->timeout); 5030 5031 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5032 log_info("HCI_STATE_HALTING: wait 50 ms"); 5033 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5034 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5035 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5036 btstack_run_loop_add_timer(&hci_stack->timeout); 5037 break; 5038 5039 case HCI_HALTING_CLOSE: 5040 // close left over connections (that had not been properly closed before) 5041 hci_discard_connections(); 5042 5043 log_info("HCI_STATE_HALTING, calling off"); 5044 5045 // switch mode 5046 hci_power_control_off(); 5047 5048 log_info("HCI_STATE_HALTING, emitting state"); 5049 hci_emit_state(); 5050 log_info("HCI_STATE_HALTING, done"); 5051 break; 5052 5053 case HCI_HALTING_W4_CLOSE_TIMER: 5054 // keep waiting 5055 5056 break; 5057 default: 5058 break; 5059 } 5060 }; 5061 5062 static void hci_falling_asleep_run(void){ 5063 hci_connection_t * connection; 5064 switch(hci_stack->substate) { 5065 case HCI_FALLING_ASLEEP_DISCONNECT: 5066 log_info("HCI_STATE_FALLING_ASLEEP"); 5067 // close all open connections 5068 connection = (hci_connection_t *) hci_stack->connections; 5069 if (connection){ 5070 5071 // send disconnect 5072 if (!hci_can_send_command_packet_now()) return; 5073 5074 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5075 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5076 5077 // send disconnected event right away - causes higher layer connections to get closed, too. 5078 hci_shutdown_connection(connection); 5079 return; 5080 } 5081 5082 if (hci_classic_supported()){ 5083 // disable page and inquiry scan 5084 if (!hci_can_send_command_packet_now()) return; 5085 5086 log_info("HCI_STATE_HALTING, disabling inq scans"); 5087 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5088 5089 // continue in next sub state 5090 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5091 break; 5092 } 5093 5094 /* fall through */ 5095 5096 case HCI_FALLING_ASLEEP_COMPLETE: 5097 log_info("HCI_STATE_HALTING, calling sleep"); 5098 // switch mode 5099 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5100 hci_emit_state(); 5101 break; 5102 5103 default: 5104 break; 5105 } 5106 } 5107 5108 #ifdef ENABLE_CLASSIC 5109 5110 static void hci_update_scan_enable(void){ 5111 // 2 = page scan, 1 = inq scan 5112 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5113 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5114 hci_run(); 5115 } 5116 5117 void gap_discoverable_control(uint8_t enable){ 5118 if (enable) enable = 1; // normalize argument 5119 5120 if (hci_stack->discoverable == enable){ 5121 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5122 return; 5123 } 5124 5125 hci_stack->discoverable = enable; 5126 hci_update_scan_enable(); 5127 } 5128 5129 void gap_connectable_control(uint8_t enable){ 5130 if (enable) enable = 1; // normalize argument 5131 5132 // don't emit event 5133 if (hci_stack->connectable == enable) return; 5134 5135 hci_stack->connectable = enable; 5136 hci_update_scan_enable(); 5137 } 5138 #endif 5139 5140 void gap_local_bd_addr(bd_addr_t address_buffer){ 5141 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5142 } 5143 5144 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5145 static void hci_host_num_completed_packets(void){ 5146 5147 // create packet manually as arrays are not supported and num_commands should not get reduced 5148 hci_reserve_packet_buffer(); 5149 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5150 5151 uint16_t size = 0; 5152 uint16_t num_handles = 0; 5153 packet[size++] = 0x35; 5154 packet[size++] = 0x0c; 5155 size++; // skip param len 5156 size++; // skip num handles 5157 5158 // add { handle, packets } entries 5159 btstack_linked_item_t * it; 5160 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5161 hci_connection_t * connection = (hci_connection_t *) it; 5162 if (connection->num_packets_completed){ 5163 little_endian_store_16(packet, size, connection->con_handle); 5164 size += 2; 5165 little_endian_store_16(packet, size, connection->num_packets_completed); 5166 size += 2; 5167 // 5168 num_handles++; 5169 connection->num_packets_completed = 0; 5170 } 5171 } 5172 5173 packet[2] = size - 3; 5174 packet[3] = num_handles; 5175 5176 hci_stack->host_completed_packets = 0; 5177 5178 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5179 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5180 5181 // release packet buffer for synchronous transport implementations 5182 if (hci_transport_synchronous()){ 5183 hci_release_packet_buffer(); 5184 hci_emit_transport_packet_sent(); 5185 } 5186 } 5187 #endif 5188 5189 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5190 UNUSED(ds); 5191 hci_stack->substate = HCI_HALTING_CLOSE; 5192 // allow packet handlers to defer final shutdown 5193 hci_emit_state(); 5194 hci_run(); 5195 } 5196 5197 static bool hci_run_acl_fragments(void){ 5198 if (hci_stack->acl_fragmentation_total_size > 0u) { 5199 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5200 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5201 if (connection) { 5202 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5203 hci_send_acl_packet_fragments(connection); 5204 return true; 5205 } 5206 } else { 5207 // connection gone -> discard further fragments 5208 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5209 hci_stack->acl_fragmentation_total_size = 0; 5210 hci_stack->acl_fragmentation_pos = 0; 5211 } 5212 } 5213 return false; 5214 } 5215 5216 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5217 static bool hci_run_iso_fragments(void){ 5218 if (hci_stack->iso_fragmentation_total_size > 0u) { 5219 // TODO: flow control 5220 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5221 hci_send_iso_packet_fragments(); 5222 return true; 5223 } 5224 } 5225 return false; 5226 } 5227 #endif 5228 5229 #ifdef ENABLE_CLASSIC 5230 5231 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5232 static bool hci_classic_operation_active(void) { 5233 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5234 return true; 5235 } 5236 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5237 return true; 5238 } 5239 btstack_linked_item_t * it; 5240 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5241 hci_connection_t *connection = (hci_connection_t *) it; 5242 switch (connection->state) { 5243 case SENT_CREATE_CONNECTION: 5244 case SENT_CANCEL_CONNECTION: 5245 case SENT_DISCONNECT: 5246 return true; 5247 default: 5248 break; 5249 } 5250 } 5251 return false; 5252 } 5253 #endif 5254 5255 static bool hci_run_general_gap_classic(void){ 5256 5257 // assert stack is working and classic is active 5258 if (hci_classic_supported() == false) return false; 5259 if (hci_stack->state != HCI_STATE_WORKING) return false; 5260 5261 // decline incoming connections 5262 if (hci_stack->decline_reason){ 5263 uint8_t reason = hci_stack->decline_reason; 5264 hci_stack->decline_reason = 0; 5265 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5266 return true; 5267 } 5268 5269 if (hci_stack->gap_tasks_classic != 0){ 5270 hci_run_gap_tasks_classic(); 5271 return true; 5272 } 5273 5274 // start/stop inquiry 5275 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5276 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5277 if (hci_classic_operation_active() == false) 5278 #endif 5279 { 5280 uint8_t duration = hci_stack->inquiry_state; 5281 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5282 if (hci_stack->inquiry_max_period_length != 0){ 5283 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); 5284 } else { 5285 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5286 } 5287 return true; 5288 } 5289 } 5290 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5291 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5292 hci_send_cmd(&hci_inquiry_cancel); 5293 return true; 5294 } 5295 5296 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5297 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5298 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5299 return true; 5300 } 5301 5302 // remote name request 5303 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5304 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5305 if (hci_classic_operation_active() == false) 5306 #endif 5307 { 5308 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5309 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5310 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5311 return true; 5312 } 5313 } 5314 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5315 // Local OOB data 5316 if (hci_stack->classic_read_local_oob_data){ 5317 hci_stack->classic_read_local_oob_data = false; 5318 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5319 hci_send_cmd(&hci_read_local_extended_oob_data); 5320 } else { 5321 hci_send_cmd(&hci_read_local_oob_data); 5322 } 5323 } 5324 #endif 5325 // pairing 5326 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5327 uint8_t state = hci_stack->gap_pairing_state; 5328 uint8_t pin_code[16]; 5329 switch (state){ 5330 case GAP_PAIRING_STATE_SEND_PIN: 5331 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5332 memset(pin_code, 0, 16); 5333 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5334 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5335 break; 5336 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5337 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5338 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5339 break; 5340 case GAP_PAIRING_STATE_SEND_PASSKEY: 5341 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5342 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5343 break; 5344 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5345 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5346 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5347 break; 5348 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5349 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5350 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5351 break; 5352 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5353 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5354 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5355 break; 5356 default: 5357 break; 5358 } 5359 return true; 5360 } 5361 return false; 5362 } 5363 #endif 5364 5365 #ifdef ENABLE_BLE 5366 5367 #ifdef ENABLE_LE_CENTRAL 5368 static void hci_le_scan_stop(void){ 5369 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5370 if (hci_extended_advertising_supported()) { 5371 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5372 } else 5373 #endif 5374 { 5375 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5376 } 5377 } 5378 #endif 5379 5380 #ifdef ENABLE_LE_PERIPHERAL 5381 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5382 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5383 uint8_t operation = 0; 5384 if (pos == 0){ 5385 // first fragment or complete data 5386 operation |= 1; 5387 } 5388 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5389 // last fragment or complete data 5390 operation |= 2; 5391 } 5392 return operation; 5393 } 5394 #endif 5395 #endif 5396 5397 static bool hci_run_general_gap_le(void){ 5398 5399 btstack_linked_list_iterator_t lit; 5400 5401 // Phase 1: collect what to stop 5402 5403 #ifdef ENABLE_LE_CENTRAL 5404 bool scanning_stop = false; 5405 bool connecting_stop = false; 5406 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5407 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5408 bool periodic_sync_stop = false; 5409 #endif 5410 #endif 5411 #endif 5412 5413 #ifdef ENABLE_LE_PERIPHERAL 5414 bool advertising_stop = false; 5415 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5416 le_advertising_set_t * advertising_stop_set = NULL; 5417 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5418 bool periodic_advertising_stop = false; 5419 #endif 5420 #endif 5421 #endif 5422 5423 // check if own address changes 5424 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5425 5426 // check if whitelist needs modification 5427 bool whitelist_modification_pending = false; 5428 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5429 while (btstack_linked_list_iterator_has_next(&lit)){ 5430 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5431 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5432 whitelist_modification_pending = true; 5433 break; 5434 } 5435 } 5436 5437 // check if resolving list needs modification 5438 bool resolving_list_modification_pending = false; 5439 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5440 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5441 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5442 resolving_list_modification_pending = true; 5443 } 5444 #endif 5445 5446 #ifdef ENABLE_LE_CENTRAL 5447 5448 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5449 // check if periodic advertiser list needs modification 5450 bool periodic_list_modification_pending = false; 5451 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5452 while (btstack_linked_list_iterator_has_next(&lit)){ 5453 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5454 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5455 periodic_list_modification_pending = true; 5456 break; 5457 } 5458 } 5459 #endif 5460 5461 // scanning control 5462 if (hci_stack->le_scanning_active) { 5463 // stop if: 5464 // - parameter change required 5465 // - it's disabled 5466 // - whitelist change required but used for scanning 5467 // - resolving list modified 5468 // - own address changes 5469 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5470 if ((hci_stack->le_scanning_param_update) || 5471 !hci_stack->le_scanning_enabled || 5472 (scanning_uses_whitelist && whitelist_modification_pending) || 5473 resolving_list_modification_pending || 5474 random_address_change){ 5475 5476 scanning_stop = true; 5477 } 5478 } 5479 5480 // connecting control 5481 bool connecting_with_whitelist; 5482 switch (hci_stack->le_connecting_state){ 5483 case LE_CONNECTING_DIRECT: 5484 case LE_CONNECTING_WHITELIST: 5485 // stop connecting if: 5486 // - connecting uses white and whitelist modification pending 5487 // - if it got disabled 5488 // - resolving list modified 5489 // - own address changes 5490 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5491 if ((connecting_with_whitelist && whitelist_modification_pending) || 5492 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5493 resolving_list_modification_pending || 5494 random_address_change) { 5495 5496 connecting_stop = true; 5497 } 5498 break; 5499 default: 5500 break; 5501 } 5502 5503 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5504 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5505 // periodic sync control 5506 bool sync_with_advertiser_list; 5507 switch(hci_stack->le_periodic_sync_state){ 5508 case LE_CONNECTING_DIRECT: 5509 case LE_CONNECTING_WHITELIST: 5510 // stop sync if: 5511 // - sync with advertiser list and advertiser list modification pending 5512 // - if it got disabled 5513 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5514 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5515 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5516 periodic_sync_stop = true; 5517 } 5518 break; 5519 default: 5520 break; 5521 } 5522 #endif 5523 #endif 5524 5525 #endif /* ENABLE_LE_CENTRAL */ 5526 5527 #ifdef ENABLE_LE_PERIPHERAL 5528 // le advertisement control 5529 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5530 // stop if: 5531 // - parameter change required 5532 // - random address used in advertising and changes 5533 // - it's disabled 5534 // - whitelist change required but used for advertisement filter policy 5535 // - resolving list modified 5536 // - own address changes 5537 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5538 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5539 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5540 if (advertising_change || 5541 (advertising_uses_random_address && random_address_change) || 5542 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5543 (advertising_uses_whitelist && whitelist_modification_pending) || 5544 resolving_list_modification_pending || 5545 random_address_change) { 5546 5547 advertising_stop = true; 5548 } 5549 } 5550 5551 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5552 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5553 btstack_linked_list_iterator_t it; 5554 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5555 while (btstack_linked_list_iterator_has_next(&it)){ 5556 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5557 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5558 // stop if: 5559 // - parameter change required 5560 // - random address used in connectable advertising and changes 5561 // - it's disabled 5562 // - whitelist change required but used for advertisement filter policy 5563 // - resolving list modified 5564 // - own address changes 5565 // - advertisement set will be removed 5566 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5567 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5568 bool advertising_uses_random_address = 5569 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5570 advertising_connectable; 5571 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5572 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5573 bool advertising_set_random_address_change = 5574 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5575 bool advertising_set_will_be_removed = 5576 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5577 if (advertising_parameter_change || 5578 (advertising_uses_random_address && advertising_set_random_address_change) || 5579 (advertising_enabled == false) || 5580 (advertising_uses_whitelist && whitelist_modification_pending) || 5581 resolving_list_modification_pending || 5582 advertising_set_will_be_removed) { 5583 5584 advertising_stop = true; 5585 advertising_stop_set = advertising_set; 5586 break; 5587 } 5588 } 5589 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5590 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5591 // stop if: 5592 // - it's disabled 5593 // - parameter change required 5594 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5595 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5596 if ((periodic_enabled == false) || periodic_parameter_change){ 5597 periodic_advertising_stop = true; 5598 advertising_stop_set = advertising_set; 5599 } 5600 } 5601 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5602 } 5603 } 5604 #endif 5605 5606 #endif 5607 5608 5609 // Phase 2: stop everything that should be off during modifications 5610 5611 5612 // 2.1 Outgoing connection 5613 #ifdef ENABLE_LE_CENTRAL 5614 if (connecting_stop){ 5615 hci_send_cmd(&hci_le_create_connection_cancel); 5616 return true; 5617 } 5618 #endif 5619 5620 // 2.2 Scanning 5621 #ifdef ENABLE_LE_CENTRAL 5622 if (scanning_stop){ 5623 hci_stack->le_scanning_active = false; 5624 hci_le_scan_stop(); 5625 return true; 5626 } 5627 5628 // 2.3 Periodic Sync 5629 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5630 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5631 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5632 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5633 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5634 return true; 5635 } 5636 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5637 if (periodic_sync_stop){ 5638 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5639 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5640 return true; 5641 } 5642 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5643 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5644 #endif /* ENABLE_LE_CENTRAL */ 5645 5646 // 2.4 Advertising: legacy, extended, periodic 5647 #ifdef ENABLE_LE_PERIPHERAL 5648 if (advertising_stop){ 5649 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5650 if (hci_extended_advertising_supported()) { 5651 uint8_t advertising_stop_handle; 5652 if (advertising_stop_set != NULL){ 5653 advertising_stop_handle = advertising_stop_set->advertising_handle; 5654 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5655 } else { 5656 advertising_stop_handle = 0; 5657 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5658 } 5659 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5660 const uint16_t durations[] = { 0 }; 5661 const uint16_t max_events[] = { 0 }; 5662 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5663 } else 5664 #endif 5665 { 5666 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5667 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5668 } 5669 return true; 5670 } 5671 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5672 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5673 if (periodic_advertising_stop){ 5674 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5675 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5676 return true; 5677 } 5678 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5679 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5680 #endif /* ENABLE_LE_PERIPHERAL */ 5681 5682 5683 // Phase 3: modify 5684 5685 if (random_address_change){ 5686 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5687 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5688 if (hci_extended_advertising_supported()) { 5689 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5690 } 5691 #endif 5692 { 5693 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5694 } 5695 return true; 5696 } 5697 5698 #ifdef ENABLE_LE_CENTRAL 5699 if (hci_stack->le_scanning_param_update){ 5700 hci_stack->le_scanning_param_update = false; 5701 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5702 if (hci_extended_advertising_supported()){ 5703 // prepare arrays for all PHYs 5704 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5705 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5706 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5707 uint8_t scanning_phys = 1; // LE 1M PHY 5708 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5709 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5710 } else 5711 #endif 5712 { 5713 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5714 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5715 } 5716 return true; 5717 } 5718 #endif 5719 5720 #ifdef ENABLE_LE_PERIPHERAL 5721 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5722 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5723 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5724 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5725 if (hci_extended_advertising_supported()){ 5726 // map advertisment type to advertising event properties 5727 uint16_t adv_event_properties = 0; 5728 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5729 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5730 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5731 } 5732 hci_stack->le_advertising_set_in_current_command = 0; 5733 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5734 0, 5735 adv_event_properties, 5736 hci_stack->le_advertisements_interval_min, 5737 hci_stack->le_advertisements_interval_max, 5738 hci_stack->le_advertisements_channel_map, 5739 hci_stack->le_advertisements_own_addr_type, 5740 hci_stack->le_advertisements_direct_address_type, 5741 hci_stack->le_advertisements_direct_address, 5742 hci_stack->le_advertisements_filter_policy, 5743 0x7f, // tx power: no preference 5744 0x01, // primary adv phy: LE 1M 5745 0, // secondary adv max skip 5746 0, // secondary adv phy 5747 0, // adv sid 5748 0 // scan request notification 5749 ); 5750 } 5751 #endif 5752 { 5753 hci_send_cmd(&hci_le_set_advertising_parameters, 5754 hci_stack->le_advertisements_interval_min, 5755 hci_stack->le_advertisements_interval_max, 5756 hci_stack->le_advertisements_type, 5757 hci_stack->le_advertisements_own_addr_type, 5758 hci_stack->le_advertisements_direct_address_type, 5759 hci_stack->le_advertisements_direct_address, 5760 hci_stack->le_advertisements_channel_map, 5761 hci_stack->le_advertisements_filter_policy); 5762 } 5763 return true; 5764 } 5765 5766 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5767 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5768 uint8_t adv_data_clean[31]; 5769 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5770 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5771 hci_stack->le_advertisements_data_len); 5772 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5773 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5774 if (hci_extended_advertising_supported()){ 5775 hci_stack->le_advertising_set_in_current_command = 0; 5776 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5777 } else 5778 #endif 5779 { 5780 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5781 } 5782 return true; 5783 } 5784 5785 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5786 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5787 uint8_t scan_data_clean[31]; 5788 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5789 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5790 hci_stack->le_scan_response_data_len); 5791 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5792 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5793 if (hci_extended_advertising_supported()){ 5794 hci_stack->le_advertising_set_in_current_command = 0; 5795 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5796 } else 5797 #endif 5798 { 5799 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5800 } 5801 return true; 5802 } 5803 5804 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5805 if (hci_extended_advertising_supported()) { 5806 btstack_linked_list_iterator_t it; 5807 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5808 while (btstack_linked_list_iterator_has_next(&it)){ 5809 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5810 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5811 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5812 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5813 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5814 return true; 5815 } 5816 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5817 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5818 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5819 return true; 5820 } 5821 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5822 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5823 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5824 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5825 advertising_set->advertising_handle, 5826 advertising_set->extended_params.advertising_event_properties, 5827 advertising_set->extended_params.primary_advertising_interval_min, 5828 advertising_set->extended_params.primary_advertising_interval_max, 5829 advertising_set->extended_params.primary_advertising_channel_map, 5830 advertising_set->extended_params.own_address_type, 5831 advertising_set->extended_params.peer_address_type, 5832 advertising_set->extended_params.peer_address, 5833 advertising_set->extended_params.advertising_filter_policy, 5834 advertising_set->extended_params.advertising_tx_power, 5835 advertising_set->extended_params.primary_advertising_phy, 5836 advertising_set->extended_params.secondary_advertising_max_skip, 5837 advertising_set->extended_params.secondary_advertising_phy, 5838 advertising_set->extended_params.advertising_sid, 5839 advertising_set->extended_params.scan_request_notification_enable 5840 ); 5841 return true; 5842 } 5843 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5844 uint16_t pos = advertising_set->adv_data_pos; 5845 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5846 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5847 if ((operation & 0x02) != 0){ 5848 // last fragment or complete data 5849 operation |= 2; 5850 advertising_set->adv_data_pos = 0; 5851 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5852 } else { 5853 advertising_set->adv_data_pos += data_to_upload; 5854 } 5855 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5856 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5857 return true; 5858 } 5859 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5860 uint16_t pos = advertising_set->scan_data_pos; 5861 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5862 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5863 if ((operation & 0x02) != 0){ 5864 advertising_set->scan_data_pos = 0; 5865 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5866 } else { 5867 advertising_set->scan_data_pos += data_to_upload; 5868 } 5869 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5870 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5871 return true; 5872 } 5873 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5874 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5875 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5876 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5877 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5878 advertising_set->advertising_handle, 5879 advertising_set->periodic_params.periodic_advertising_interval_min, 5880 advertising_set->periodic_params.periodic_advertising_interval_max, 5881 advertising_set->periodic_params.periodic_advertising_properties); 5882 return true; 5883 } 5884 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5885 uint16_t pos = advertising_set->periodic_data_pos; 5886 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5887 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5888 if ((operation & 0x02) != 0){ 5889 // last fragment or complete data 5890 operation |= 2; 5891 advertising_set->periodic_data_pos = 0; 5892 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5893 } else { 5894 advertising_set->periodic_data_pos += data_to_upload; 5895 } 5896 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5897 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5898 return true; 5899 } 5900 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5901 } 5902 } 5903 #endif 5904 5905 #endif 5906 5907 #ifdef ENABLE_LE_CENTRAL 5908 // if connect with whitelist was active and is not cancelled yet, wait until next time 5909 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5910 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5911 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5912 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5913 #endif 5914 #endif 5915 5916 // LE Whitelist Management 5917 if (whitelist_modification_pending){ 5918 // add/remove entries 5919 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5920 while (btstack_linked_list_iterator_has_next(&lit)){ 5921 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5922 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5923 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5924 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5925 return true; 5926 } 5927 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5928 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5929 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5930 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5931 return true; 5932 } 5933 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5934 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5935 btstack_memory_whitelist_entry_free(entry); 5936 } 5937 } 5938 } 5939 5940 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5941 // LE Resolving List Management 5942 if (resolving_list_supported) { 5943 uint16_t i; 5944 switch (hci_stack->le_resolving_list_state) { 5945 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5946 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5947 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5948 return true; 5949 case LE_RESOLVING_LIST_READ_SIZE: 5950 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5951 hci_send_cmd(&hci_le_read_resolving_list_size); 5952 return true; 5953 case LE_RESOLVING_LIST_SEND_CLEAR: 5954 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5955 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5956 sizeof(hci_stack->le_resolving_list_add_entries)); 5957 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5958 sizeof(hci_stack->le_resolving_list_remove_entries)); 5959 hci_send_cmd(&hci_le_clear_resolving_list); 5960 return true; 5961 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5962 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5963 uint8_t offset = i >> 3; 5964 uint8_t mask = 1 << (i & 7); 5965 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5966 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5967 bd_addr_t peer_identity_addreses; 5968 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5969 sm_key_t peer_irk; 5970 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5971 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5972 5973 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5974 // trigger whitelist entry 'update' (work around for controller bug) 5975 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5976 while (btstack_linked_list_iterator_has_next(&lit)) { 5977 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5978 if (entry->address_type != peer_identity_addr_type) continue; 5979 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5980 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5981 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5982 } 5983 #endif 5984 5985 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5986 peer_identity_addreses); 5987 return true; 5988 } 5989 5990 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5991 5992 /* fall through */ 5993 5994 case LE_RESOLVING_LIST_ADD_ENTRIES: 5995 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5996 uint8_t offset = i >> 3; 5997 uint8_t mask = 1 << (i & 7); 5998 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 5999 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6000 bd_addr_t peer_identity_addreses; 6001 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6002 sm_key_t peer_irk; 6003 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6004 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6005 if (btstack_is_null(peer_irk, 16)) continue; 6006 const uint8_t *local_irk = gap_get_persistent_irk(); 6007 // command uses format specifier 'P' that stores 16-byte value without flip 6008 uint8_t local_irk_flipped[16]; 6009 uint8_t peer_irk_flipped[16]; 6010 reverse_128(local_irk, local_irk_flipped); 6011 reverse_128(peer_irk, peer_irk_flipped); 6012 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6013 peer_irk_flipped, local_irk_flipped); 6014 return true; 6015 } 6016 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6017 break; 6018 6019 default: 6020 break; 6021 } 6022 } 6023 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6024 #endif 6025 6026 #ifdef ENABLE_LE_CENTRAL 6027 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6028 // LE Whitelist Management 6029 if (periodic_list_modification_pending){ 6030 // add/remove entries 6031 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6032 while (btstack_linked_list_iterator_has_next(&lit)){ 6033 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6034 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6035 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6036 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6037 return true; 6038 } 6039 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6040 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6041 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6042 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6043 return true; 6044 } 6045 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6046 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6047 btstack_memory_periodic_advertiser_list_entry_free(entry); 6048 } 6049 } 6050 } 6051 #endif 6052 #endif 6053 6054 // post-pone all actions until stack is fully working 6055 if (hci_stack->state != HCI_STATE_WORKING) return false; 6056 6057 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6058 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6059 6060 // Phase 4: restore state 6061 6062 #ifdef ENABLE_LE_CENTRAL 6063 // re-start scanning 6064 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6065 hci_stack->le_scanning_active = true; 6066 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6067 if (hci_extended_advertising_supported()){ 6068 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 6069 } else 6070 #endif 6071 { 6072 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 6073 } 6074 return true; 6075 } 6076 #endif 6077 6078 #ifdef ENABLE_LE_CENTRAL 6079 // re-start connecting 6080 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6081 bd_addr_t null_addr; 6082 memset(null_addr, 0, 6); 6083 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6084 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6085 hci_send_cmd(&hci_le_create_connection, 6086 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 6087 hci_stack->le_connection_scan_window, // scan interval: 30 ms 6088 1, // use whitelist 6089 0, // peer address type 6090 null_addr, // peer bd addr 6091 hci_stack->le_connection_own_addr_type, // our addr type: 6092 hci_stack->le_connection_interval_min, // conn interval min 6093 hci_stack->le_connection_interval_max, // conn interval max 6094 hci_stack->le_connection_latency, // conn latency 6095 hci_stack->le_supervision_timeout, // conn latency 6096 hci_stack->le_minimum_ce_length, // min ce length 6097 hci_stack->le_maximum_ce_length // max ce length 6098 ); 6099 return true; 6100 } 6101 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6102 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6103 switch(hci_stack->le_periodic_sync_request){ 6104 case LE_CONNECTING_DIRECT: 6105 case LE_CONNECTING_WHITELIST: 6106 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6107 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6108 hci_stack->le_periodic_sync_options, 6109 hci_stack->le_periodic_sync_advertising_sid, 6110 hci_stack->le_periodic_sync_advertiser_address_type, 6111 hci_stack->le_periodic_sync_advertiser_address, 6112 hci_stack->le_periodic_sync_skip, 6113 hci_stack->le_periodic_sync_timeout, 6114 hci_stack->le_periodic_sync_cte_type); 6115 return true; 6116 default: 6117 break; 6118 } 6119 } 6120 #endif 6121 #endif 6122 6123 #ifdef ENABLE_LE_PERIPHERAL 6124 // re-start advertising 6125 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6126 // check if advertisements should be enabled given 6127 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6128 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6129 6130 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6131 if (hci_extended_advertising_supported()){ 6132 const uint8_t advertising_handles[] = { 0 }; 6133 const uint16_t durations[] = { 0 }; 6134 const uint16_t max_events[] = { 0 }; 6135 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6136 } else 6137 #endif 6138 { 6139 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6140 } 6141 return true; 6142 } 6143 6144 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6145 if (hci_extended_advertising_supported()) { 6146 btstack_linked_list_iterator_t it; 6147 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6148 while (btstack_linked_list_iterator_has_next(&it)) { 6149 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6150 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6151 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6152 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6153 const uint16_t durations[] = { advertising_set->enable_timeout }; 6154 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6155 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6156 return true; 6157 } 6158 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6159 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6160 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6161 uint8_t enable = 1; 6162 if (advertising_set->periodic_include_adi){ 6163 enable |= 2; 6164 } 6165 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6166 return true; 6167 } 6168 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6169 } 6170 } 6171 #endif 6172 #endif 6173 6174 return false; 6175 } 6176 6177 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6178 static bool hci_run_iso_tasks(void){ 6179 btstack_linked_list_iterator_t it; 6180 6181 // BIG 6182 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6183 while (btstack_linked_list_iterator_has_next(&it)){ 6184 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6185 switch (big->state){ 6186 case LE_AUDIO_BIG_STATE_CREATE: 6187 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6188 hci_send_cmd(&hci_le_create_big, 6189 big->params->big_handle, 6190 big->params->advertising_handle, 6191 big->params->num_bis, 6192 big->params->sdu_interval_us, 6193 big->params->max_sdu, 6194 big->params->max_transport_latency_ms, 6195 big->params->rtn, 6196 big->params->phy, 6197 big->params->packing, 6198 big->params->framing, 6199 big->params->encryption, 6200 big->params->broadcast_code); 6201 return true; 6202 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6203 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6204 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); 6205 return true; 6206 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6207 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6208 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6209 return true; 6210 case LE_AUDIO_BIG_STATE_TERMINATE: 6211 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6212 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6213 return true; 6214 default: 6215 break; 6216 } 6217 } 6218 6219 // BIG Sync 6220 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6221 while (btstack_linked_list_iterator_has_next(&it)){ 6222 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6223 switch (big_sync->state){ 6224 case LE_AUDIO_BIG_STATE_CREATE: 6225 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6226 hci_send_cmd(&hci_le_big_create_sync, 6227 big_sync->params->big_handle, 6228 big_sync->params->sync_handle, 6229 big_sync->params->encryption, 6230 big_sync->params->broadcast_code, 6231 big_sync->params->mse, 6232 big_sync->params->big_sync_timeout_10ms, 6233 big_sync->params->num_bis, 6234 big_sync->params->bis_indices); 6235 return true; 6236 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6237 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6238 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); 6239 return true; 6240 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6241 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6242 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6243 return true; 6244 case LE_AUDIO_BIG_STATE_TERMINATE: 6245 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6246 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6247 return true; 6248 default: 6249 break; 6250 } 6251 } 6252 6253 return false; 6254 } 6255 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6256 #endif 6257 6258 static bool hci_run_general_pending_commands(void){ 6259 btstack_linked_item_t * it; 6260 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6261 hci_connection_t * connection = (hci_connection_t *) it; 6262 6263 switch(connection->state){ 6264 case SEND_CREATE_CONNECTION: 6265 switch(connection->address_type){ 6266 #ifdef ENABLE_CLASSIC 6267 case BD_ADDR_TYPE_ACL: 6268 log_info("sending hci_create_connection"); 6269 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6270 break; 6271 #endif 6272 default: 6273 #ifdef ENABLE_BLE 6274 #ifdef ENABLE_LE_CENTRAL 6275 log_info("sending hci_le_create_connection"); 6276 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6277 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6278 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6279 if (hci_extended_advertising_supported()) { 6280 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 6281 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 6282 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 6283 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 6284 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 6285 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 6286 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 6287 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 6288 hci_send_cmd(&hci_le_extended_create_connection, 6289 0, // don't use whitelist 6290 hci_stack->le_connection_own_addr_type, // our addr type: 6291 connection->address_type, // peer address type 6292 connection->address, // peer bd addr 6293 1, // initiating PHY - 1M 6294 le_connection_scan_interval, // conn scan interval 6295 le_connection_scan_window, // conn scan windows 6296 le_connection_interval_min, // conn interval min 6297 le_connection_interval_max, // conn interval max 6298 le_connection_latency, // conn latency 6299 le_supervision_timeout, // conn latency 6300 le_minimum_ce_length, // min ce length 6301 le_maximum_ce_length // max ce length 6302 ); } 6303 else 6304 #endif 6305 { 6306 hci_send_cmd(&hci_le_create_connection, 6307 hci_stack->le_connection_scan_interval, // conn scan interval 6308 hci_stack->le_connection_scan_window, // conn scan windows 6309 0, // don't use whitelist 6310 connection->address_type, // peer address type 6311 connection->address, // peer bd addr 6312 hci_stack->le_connection_own_addr_type, // our addr type: 6313 hci_stack->le_connection_interval_min, // conn interval min 6314 hci_stack->le_connection_interval_max, // conn interval max 6315 hci_stack->le_connection_latency, // conn latency 6316 hci_stack->le_supervision_timeout, // conn latency 6317 hci_stack->le_minimum_ce_length, // min ce length 6318 hci_stack->le_maximum_ce_length // max ce length 6319 ); 6320 } 6321 connection->state = SENT_CREATE_CONNECTION; 6322 #endif 6323 #endif 6324 break; 6325 } 6326 return true; 6327 6328 #ifdef ENABLE_CLASSIC 6329 case RECEIVED_CONNECTION_REQUEST: 6330 connection->role = HCI_ROLE_SLAVE; 6331 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6332 log_info("sending hci_accept_connection_request"); 6333 connection->state = ACCEPTED_CONNECTION_REQUEST; 6334 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6335 return true; 6336 } 6337 break; 6338 #endif 6339 case SEND_DISCONNECT: 6340 connection->state = SENT_DISCONNECT; 6341 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6342 return true; 6343 6344 default: 6345 break; 6346 } 6347 6348 // no further commands if connection is about to get shut down 6349 if (connection->state == SENT_DISCONNECT) continue; 6350 6351 #ifdef ENABLE_CLASSIC 6352 6353 // Handling link key request requires remote supported features 6354 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6355 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6356 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6357 6358 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6359 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6360 if (have_link_key && security_level_sufficient){ 6361 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6362 } else { 6363 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6364 } 6365 return true; 6366 } 6367 6368 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6369 log_info("denying to pin request"); 6370 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6371 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6372 return true; 6373 } 6374 6375 // security assessment requires remote features 6376 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6377 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6378 hci_ssp_assess_security_on_io_cap_request(connection); 6379 // 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 6380 } 6381 6382 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6383 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6384 // set authentication requirements: 6385 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6386 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6387 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6388 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6389 authreq |= 1; 6390 } 6391 bool bonding = hci_stack->bondable; 6392 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6393 // if we have received IO Cap Response, we're in responder role 6394 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6395 if (bonding && !remote_bonding){ 6396 log_info("Remote not bonding, dropping local flag"); 6397 bonding = false; 6398 } 6399 } 6400 if (bonding){ 6401 if (connection->bonding_flags & BONDING_DEDICATED){ 6402 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6403 } else { 6404 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6405 } 6406 } 6407 uint8_t have_oob_data = 0; 6408 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6409 if (connection->classic_oob_c_192 != NULL){ 6410 have_oob_data |= 1; 6411 } 6412 if (connection->classic_oob_c_256 != NULL){ 6413 have_oob_data |= 2; 6414 } 6415 #endif 6416 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6417 return true; 6418 } 6419 6420 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6421 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6422 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6423 return true; 6424 } 6425 6426 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6427 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6428 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6429 const uint8_t zero[16] = { 0 }; 6430 const uint8_t * r_192 = zero; 6431 const uint8_t * c_192 = zero; 6432 const uint8_t * r_256 = zero; 6433 const uint8_t * c_256 = zero; 6434 // verify P-256 OOB 6435 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6436 c_256 = connection->classic_oob_c_256; 6437 if (connection->classic_oob_r_256 != NULL) { 6438 r_256 = connection->classic_oob_r_256; 6439 } 6440 } 6441 // verify P-192 OOB 6442 if ((connection->classic_oob_c_192 != NULL)) { 6443 c_192 = connection->classic_oob_c_192; 6444 if (connection->classic_oob_r_192 != NULL) { 6445 r_192 = connection->classic_oob_r_192; 6446 } 6447 } 6448 6449 // assess security 6450 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6451 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6452 if (need_level_4 && !can_reach_level_4){ 6453 log_info("Level 4 required, but not possible -> abort"); 6454 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6455 // send oob negative reply 6456 c_256 = NULL; 6457 c_192 = NULL; 6458 } 6459 6460 // Reply 6461 if (c_256 != zero) { 6462 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6463 } else if (c_192 != zero){ 6464 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6465 } else { 6466 hci_stack->classic_oob_con_handle = connection->con_handle; 6467 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6468 } 6469 return true; 6470 } 6471 #endif 6472 6473 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6474 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6475 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6476 return true; 6477 } 6478 6479 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6480 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6481 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6482 return true; 6483 } 6484 6485 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6486 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6487 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6488 return true; 6489 } 6490 6491 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6492 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6493 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6494 connection->state = SENT_DISCONNECT; 6495 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6496 return true; 6497 } 6498 6499 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6500 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6501 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6502 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6503 return true; 6504 } 6505 6506 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6507 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6508 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6509 return true; 6510 } 6511 6512 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6513 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6514 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6515 return true; 6516 } 6517 6518 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6519 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6520 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6521 return true; 6522 } 6523 6524 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6525 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6526 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6527 return true; 6528 } 6529 6530 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6531 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6532 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6533 return true; 6534 } 6535 #endif 6536 6537 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6538 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6539 #ifdef ENABLE_CLASSIC 6540 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6541 #endif 6542 if (connection->state != SENT_DISCONNECT){ 6543 connection->state = SENT_DISCONNECT; 6544 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6545 return true; 6546 } 6547 } 6548 6549 #ifdef ENABLE_CLASSIC 6550 uint16_t sniff_min_interval; 6551 switch (connection->sniff_min_interval){ 6552 case 0: 6553 break; 6554 case 0xffff: 6555 connection->sniff_min_interval = 0; 6556 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6557 return true; 6558 default: 6559 sniff_min_interval = connection->sniff_min_interval; 6560 connection->sniff_min_interval = 0; 6561 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6562 return true; 6563 } 6564 6565 if (connection->sniff_subrating_max_latency != 0xffff){ 6566 uint16_t max_latency = connection->sniff_subrating_max_latency; 6567 connection->sniff_subrating_max_latency = 0; 6568 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6569 return true; 6570 } 6571 6572 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6573 uint8_t service_type = (uint8_t) connection->qos_service_type; 6574 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6575 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); 6576 return true; 6577 } 6578 6579 if (connection->request_role != HCI_ROLE_INVALID){ 6580 hci_role_t role = connection->request_role; 6581 connection->request_role = HCI_ROLE_INVALID; 6582 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6583 return true; 6584 } 6585 #endif 6586 6587 if (connection->gap_connection_tasks != 0){ 6588 #ifdef ENABLE_CLASSIC 6589 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6590 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6591 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6592 return true; 6593 } 6594 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6595 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6596 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6597 return true; 6598 } 6599 #endif 6600 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6601 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6602 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6603 return true; 6604 } 6605 } 6606 6607 #ifdef ENABLE_BLE 6608 switch (connection->le_con_parameter_update_state){ 6609 // response to L2CAP CON PARAMETER UPDATE REQUEST 6610 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6611 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6612 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6613 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6614 0x0000, 0xffff); 6615 return true; 6616 case CON_PARAMETER_UPDATE_REPLY: 6617 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6618 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6619 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6620 0x0000, 0xffff); 6621 return true; 6622 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6623 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6624 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6625 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6626 return true; 6627 default: 6628 break; 6629 } 6630 if (connection->le_phy_update_all_phys != 0xffu){ 6631 uint8_t all_phys = connection->le_phy_update_all_phys; 6632 connection->le_phy_update_all_phys = 0xff; 6633 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); 6634 return true; 6635 } 6636 #endif 6637 } 6638 return false; 6639 } 6640 6641 static void hci_run(void){ 6642 6643 // stack state sub statemachines 6644 switch (hci_stack->state) { 6645 case HCI_STATE_INITIALIZING: 6646 hci_initializing_run(); 6647 break; 6648 case HCI_STATE_HALTING: 6649 hci_halting_run(); 6650 break; 6651 case HCI_STATE_FALLING_ASLEEP: 6652 hci_falling_asleep_run(); 6653 break; 6654 default: 6655 break; 6656 } 6657 6658 // allow to run after initialization to working transition 6659 if (hci_stack->state != HCI_STATE_WORKING){ 6660 return; 6661 } 6662 6663 bool done; 6664 6665 // send continuation fragments first, as they block the prepared packet buffer 6666 done = hci_run_acl_fragments(); 6667 if (done) return; 6668 6669 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6670 done = hci_run_iso_fragments(); 6671 if (done) return; 6672 #endif 6673 6674 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6675 // send host num completed packets next as they don't require num_cmd_packets > 0 6676 if (!hci_can_send_comand_packet_transport()) return; 6677 if (hci_stack->host_completed_packets){ 6678 hci_host_num_completed_packets(); 6679 return; 6680 } 6681 #endif 6682 6683 if (!hci_can_send_command_packet_now()) return; 6684 6685 // global/non-connection oriented commands 6686 6687 6688 #ifdef ENABLE_CLASSIC 6689 // general gap classic 6690 done = hci_run_general_gap_classic(); 6691 if (done) return; 6692 #endif 6693 6694 #ifdef ENABLE_BLE 6695 // general gap le 6696 done = hci_run_general_gap_le(); 6697 if (done) return; 6698 6699 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6700 // ISO related tasks, e.g. BIG create/terminate/sync 6701 done = hci_run_iso_tasks(); 6702 if (done) return; 6703 #endif 6704 #endif 6705 6706 // send pending HCI commands 6707 hci_run_general_pending_commands(); 6708 } 6709 6710 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6711 // house-keeping 6712 6713 #ifdef ENABLE_CLASSIC 6714 bd_addr_t addr; 6715 hci_connection_t * conn; 6716 #endif 6717 #ifdef ENABLE_LE_CENTRAL 6718 uint8_t initiator_filter_policy; 6719 #endif 6720 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6721 uint8_t i; 6722 uint8_t num_cis; 6723 hci_con_handle_t cis_handle; 6724 uint8_t status; 6725 #endif 6726 6727 uint16_t opcode = little_endian_read_16(packet, 0); 6728 switch (opcode) { 6729 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6730 hci_stack->loopback_mode = packet[3]; 6731 break; 6732 6733 #ifdef ENABLE_CLASSIC 6734 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6735 reverse_bd_addr(&packet[3], addr); 6736 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6737 6738 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6739 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6740 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6741 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6742 } 6743 6744 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6745 if (!conn) { 6746 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6747 if (!conn) { 6748 // notify client that alloc failed 6749 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6750 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6751 } 6752 conn->state = SEND_CREATE_CONNECTION; 6753 conn->role = HCI_ROLE_MASTER; 6754 } 6755 6756 log_info("conn state %u", conn->state); 6757 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6758 switch (conn->state) { 6759 // if connection active exists 6760 case OPEN: 6761 // and OPEN, emit connection complete command 6762 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6763 // packet not sent to controller 6764 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6765 case RECEIVED_DISCONNECTION_COMPLETE: 6766 // create connection triggered in disconnect complete event, let's do it now 6767 break; 6768 case SEND_CREATE_CONNECTION: 6769 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6770 if (hci_classic_operation_active()){ 6771 return ERROR_CODE_SUCCESS; 6772 } 6773 #endif 6774 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6775 break; 6776 default: 6777 // otherwise, just ignore as it is already in the open process 6778 // packet not sent to controller 6779 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6780 } 6781 conn->state = SENT_CREATE_CONNECTION; 6782 6783 // track outgoing connection 6784 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6785 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6786 break; 6787 6788 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6789 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6790 // setup_synchronous_connection? Voice setting at offset 22 6791 // TODO: compare to current setting if sco connection already active 6792 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6793 break; 6794 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6795 // accept_synchronous_connection? Voice setting at offset 18 6796 // TODO: compare to current setting if sco connection already active 6797 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6798 // track outgoing connection 6799 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6800 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6801 break; 6802 #endif 6803 #endif 6804 6805 #ifdef ENABLE_BLE 6806 #ifdef ENABLE_LE_CENTRAL 6807 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6808 // white list used? 6809 initiator_filter_policy = packet[7]; 6810 switch (initiator_filter_policy) { 6811 case 0: 6812 // whitelist not used 6813 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6814 break; 6815 case 1: 6816 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6817 break; 6818 default: 6819 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6820 break; 6821 } 6822 // track outgoing connection 6823 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6824 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6825 break; 6826 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6827 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6828 break; 6829 #endif 6830 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6831 #ifdef ENABLE_LE_CENTRAL 6832 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6833 status = ERROR_CODE_SUCCESS; 6834 num_cis = packet[3]; 6835 // setup hci_iso_streams 6836 for (i=0;i<num_cis;i++){ 6837 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6838 status = hci_iso_stream_create(cis_handle, 0xff); 6839 if (status != ERROR_CODE_SUCCESS) { 6840 break; 6841 } 6842 } 6843 // free structs on error 6844 if (status != ERROR_CODE_SUCCESS){ 6845 hci_iso_stream_requested_finalize(0xff); 6846 return status; 6847 } 6848 break; 6849 #endif /* ENABLE_LE_CENTRAL */ 6850 #ifdef ENABLE_LE_PERIPHERAL 6851 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6852 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6853 status = hci_iso_stream_create(cis_handle, 0xff); 6854 if (status != ERROR_CODE_SUCCESS){ 6855 return status; 6856 } 6857 break; 6858 #endif /* ENABLE_LE_PERIPHERAL */ 6859 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6860 #endif /* ENABLE_BLE */ 6861 default: 6862 break; 6863 } 6864 6865 hci_stack->num_cmd_packets--; 6866 6867 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6868 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6869 if (err != 0){ 6870 return ERROR_CODE_HARDWARE_FAILURE; 6871 } 6872 return ERROR_CODE_SUCCESS; 6873 } 6874 6875 // disconnect because of security block 6876 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6877 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6878 if (!connection) return; 6879 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6880 } 6881 6882 6883 // Configure Secure Simple Pairing 6884 6885 #ifdef ENABLE_CLASSIC 6886 6887 // enable will enable SSP during init 6888 void gap_ssp_set_enable(int enable){ 6889 hci_stack->ssp_enable = enable; 6890 } 6891 6892 static int hci_local_ssp_activated(void){ 6893 return gap_ssp_supported() && hci_stack->ssp_enable; 6894 } 6895 6896 // if set, BTstack will respond to io capability request using authentication requirement 6897 void gap_ssp_set_io_capability(int io_capability){ 6898 hci_stack->ssp_io_capability = io_capability; 6899 } 6900 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6901 hci_stack->ssp_authentication_requirement = authentication_requirement; 6902 } 6903 6904 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6905 void gap_ssp_set_auto_accept(int auto_accept){ 6906 hci_stack->ssp_auto_accept = auto_accept; 6907 } 6908 6909 void gap_secure_connections_enable(bool enable){ 6910 hci_stack->secure_connections_enable = enable; 6911 } 6912 bool gap_secure_connections_active(void){ 6913 return hci_stack->secure_connections_active; 6914 } 6915 6916 #endif 6917 6918 // va_list part of hci_send_cmd 6919 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6920 if (!hci_can_send_command_packet_now()){ 6921 log_error("hci_send_cmd called but cannot send packet now"); 6922 return ERROR_CODE_COMMAND_DISALLOWED; 6923 } 6924 6925 // for HCI INITIALIZATION 6926 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6927 hci_stack->last_cmd_opcode = cmd->opcode; 6928 6929 hci_reserve_packet_buffer(); 6930 uint8_t * packet = hci_stack->hci_packet_buffer; 6931 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6932 uint8_t status = hci_send_cmd_packet(packet, size); 6933 6934 // release packet buffer on error or for synchronous transport implementations 6935 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6936 hci_release_packet_buffer(); 6937 hci_emit_transport_packet_sent(); 6938 } 6939 6940 return status; 6941 } 6942 6943 /** 6944 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6945 */ 6946 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6947 va_list argptr; 6948 va_start(argptr, cmd); 6949 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6950 va_end(argptr); 6951 return status; 6952 } 6953 6954 // Create various non-HCI events. 6955 // TODO: generalize, use table similar to hci_create_command 6956 6957 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6958 // dump packet 6959 if (dump) { 6960 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6961 } 6962 6963 // dispatch to all event handlers 6964 btstack_linked_list_iterator_t it; 6965 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6966 while (btstack_linked_list_iterator_has_next(&it)){ 6967 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6968 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6969 } 6970 } 6971 6972 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6973 if (!hci_stack->acl_packet_handler) return; 6974 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6975 } 6976 6977 #ifdef ENABLE_CLASSIC 6978 static void hci_notify_if_sco_can_send_now(void){ 6979 // notify SCO sender if waiting 6980 if (!hci_stack->sco_waiting_for_can_send_now) return; 6981 if (hci_can_send_sco_packet_now()){ 6982 hci_stack->sco_waiting_for_can_send_now = 0; 6983 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6984 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6985 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6986 } 6987 } 6988 6989 // parsing end emitting has been merged to reduce code size 6990 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 6991 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 6992 6993 uint8_t * eir_data; 6994 ad_context_t context; 6995 const uint8_t * name; 6996 uint8_t name_len; 6997 6998 if (size < 3) return; 6999 7000 int event_type = hci_event_packet_get_type(packet); 7001 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7002 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7003 7004 switch (event_type){ 7005 case HCI_EVENT_INQUIRY_RESULT: 7006 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7007 if (size != (3 + (num_responses * 14))) return; 7008 break; 7009 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7010 if (size != 257) return; 7011 if (num_responses != 1) return; 7012 break; 7013 default: 7014 return; 7015 } 7016 7017 // event[1] is set at the end 7018 int i; 7019 for (i=0; i<num_responses;i++){ 7020 memset(event, 0, sizeof(event)); 7021 event[0] = GAP_EVENT_INQUIRY_RESULT; 7022 uint8_t event_size = 27; // if name is not set by EIR 7023 7024 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7025 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7026 (void)memcpy(&event[9], 7027 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7028 3); // class of device 7029 (void)memcpy(&event[12], 7030 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7031 2); // clock offset 7032 7033 switch (event_type){ 7034 case HCI_EVENT_INQUIRY_RESULT: 7035 // 14,15,16,17 = 0, size 18 7036 break; 7037 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7038 event[14] = 1; 7039 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7040 // 16,17 = 0, size 18 7041 break; 7042 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7043 event[14] = 1; 7044 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7045 // EIR packets only contain a single inquiry response 7046 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7047 name = NULL; 7048 // Iterate over EIR data 7049 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7050 uint8_t data_type = ad_iterator_get_data_type(&context); 7051 uint8_t data_size = ad_iterator_get_data_len(&context); 7052 const uint8_t * data = ad_iterator_get_data(&context); 7053 // Prefer Complete Local Name over Shortened Local Name 7054 switch (data_type){ 7055 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7056 if (name) continue; 7057 /* fall through */ 7058 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7059 name = data; 7060 name_len = data_size; 7061 break; 7062 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7063 if (data_size != 8) break; 7064 event[16] = 1; 7065 memcpy(&event[17], data, 8); 7066 break; 7067 default: 7068 break; 7069 } 7070 } 7071 if (name){ 7072 event[25] = 1; 7073 // truncate name if needed 7074 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7075 event[26] = len; 7076 (void)memcpy(&event[27], name, len); 7077 event_size += len; 7078 } 7079 break; 7080 default: 7081 return; 7082 } 7083 event[1] = event_size - 2; 7084 hci_emit_event(event, event_size, 1); 7085 } 7086 } 7087 #endif 7088 7089 void hci_emit_state(void){ 7090 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7091 uint8_t event[3]; 7092 event[0] = BTSTACK_EVENT_STATE; 7093 event[1] = sizeof(event) - 2u; 7094 event[2] = hci_stack->state; 7095 hci_emit_event(event, sizeof(event), 1); 7096 } 7097 7098 #ifdef ENABLE_CLASSIC 7099 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7100 uint8_t event[13]; 7101 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7102 event[1] = sizeof(event) - 2; 7103 event[2] = status; 7104 little_endian_store_16(event, 3, con_handle); 7105 reverse_bd_addr(address, &event[5]); 7106 event[11] = 1; // ACL connection 7107 event[12] = 0; // encryption disabled 7108 hci_emit_event(event, sizeof(event), 1); 7109 } 7110 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7111 if (disable_l2cap_timeouts) return; 7112 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7113 uint8_t event[4]; 7114 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7115 event[1] = sizeof(event) - 2; 7116 little_endian_store_16(event, 2, conn->con_handle); 7117 hci_emit_event(event, sizeof(event), 1); 7118 } 7119 #endif 7120 7121 #ifdef ENABLE_BLE 7122 #ifdef ENABLE_LE_CENTRAL 7123 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){ 7124 uint8_t event[21]; 7125 event[0] = HCI_EVENT_LE_META; 7126 event[1] = sizeof(event) - 2u; 7127 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7128 event[3] = status; 7129 little_endian_store_16(event, 4, con_handle); 7130 event[6] = 0; // TODO: role 7131 event[7] = address_type; 7132 reverse_bd_addr(address, &event[8]); 7133 little_endian_store_16(event, 14, 0); // interval 7134 little_endian_store_16(event, 16, 0); // latency 7135 little_endian_store_16(event, 18, 0); // supervision timeout 7136 event[20] = 0; // master clock accuracy 7137 hci_emit_event(event, sizeof(event), 1); 7138 } 7139 #endif 7140 #endif 7141 7142 static void hci_emit_transport_packet_sent(void){ 7143 // notify upper stack that it might be possible to send again 7144 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7145 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7146 } 7147 7148 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7149 uint8_t event[6]; 7150 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7151 event[1] = sizeof(event) - 2u; 7152 event[2] = 0; // status = OK 7153 little_endian_store_16(event, 3, con_handle); 7154 event[5] = reason; 7155 hci_emit_event(event, sizeof(event), 1); 7156 } 7157 7158 static void hci_emit_nr_connections_changed(void){ 7159 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7160 uint8_t event[3]; 7161 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7162 event[1] = sizeof(event) - 2u; 7163 event[2] = nr_hci_connections(); 7164 hci_emit_event(event, sizeof(event), 1); 7165 } 7166 7167 static void hci_emit_hci_open_failed(void){ 7168 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7169 uint8_t event[2]; 7170 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7171 event[1] = sizeof(event) - 2u; 7172 hci_emit_event(event, sizeof(event), 1); 7173 } 7174 7175 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7176 log_info("hci_emit_dedicated_bonding_result %u ", status); 7177 uint8_t event[9]; 7178 int pos = 0; 7179 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7180 event[pos++] = sizeof(event) - 2u; 7181 event[pos++] = status; 7182 reverse_bd_addr(address, &event[pos]); 7183 hci_emit_event(event, sizeof(event), 1); 7184 } 7185 7186 7187 #ifdef ENABLE_CLASSIC 7188 7189 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7190 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7191 uint8_t event[5]; 7192 int pos = 0; 7193 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7194 event[pos++] = sizeof(event) - 2; 7195 little_endian_store_16(event, 2, con_handle); 7196 pos += 2; 7197 event[pos++] = level; 7198 hci_emit_event(event, sizeof(event), 1); 7199 } 7200 7201 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7202 if (!connection) return LEVEL_0; 7203 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7204 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7205 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7206 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7207 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7208 // LEVEL 4 always requires 128 bit encrytion key size 7209 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7210 security_level = LEVEL_3; 7211 } 7212 return security_level; 7213 } 7214 7215 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7216 uint8_t event[4]; 7217 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7218 event[1] = sizeof(event) - 2; 7219 event[2] = discoverable; 7220 event[3] = connectable; 7221 hci_emit_event(event, sizeof(event), 1); 7222 } 7223 7224 // query if remote side supports eSCO 7225 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7226 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7227 if (!connection) return false; 7228 return (connection->remote_supported_features[0] & 1) != 0; 7229 } 7230 7231 static bool hci_ssp_supported(hci_connection_t * connection){ 7232 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7233 return (connection->bonding_flags & mask) == mask; 7234 } 7235 7236 // query if remote side supports SSP 7237 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7238 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7239 if (!connection) return false; 7240 return hci_ssp_supported(connection) ? 1 : 0; 7241 } 7242 7243 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7244 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7245 } 7246 7247 /** 7248 * Check if remote supported features query has completed 7249 */ 7250 bool hci_remote_features_available(hci_con_handle_t handle){ 7251 hci_connection_t * connection = hci_connection_for_handle(handle); 7252 if (!connection) return false; 7253 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7254 } 7255 7256 /** 7257 * Trigger remote supported features query 7258 */ 7259 7260 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7261 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7262 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7263 } 7264 } 7265 7266 void hci_remote_features_query(hci_con_handle_t con_handle){ 7267 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7268 if (!connection) return; 7269 hci_trigger_remote_features_for_connection(connection); 7270 hci_run(); 7271 } 7272 7273 // GAP API 7274 /** 7275 * @bbrief enable/disable bonding. default is enabled 7276 * @praram enabled 7277 */ 7278 void gap_set_bondable_mode(int enable){ 7279 hci_stack->bondable = enable ? 1 : 0; 7280 } 7281 /** 7282 * @brief Get bondable mode. 7283 * @return 1 if bondable 7284 */ 7285 int gap_get_bondable_mode(void){ 7286 return hci_stack->bondable; 7287 } 7288 7289 /** 7290 * @brief map link keys to security levels 7291 */ 7292 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7293 switch (link_key_type){ 7294 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7295 return LEVEL_4; 7296 case COMBINATION_KEY: 7297 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7298 return LEVEL_3; 7299 default: 7300 return LEVEL_2; 7301 } 7302 } 7303 7304 /** 7305 * @brief map link keys to secure connection yes/no 7306 */ 7307 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7308 switch (link_key_type){ 7309 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7310 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7311 return true; 7312 default: 7313 return false; 7314 } 7315 } 7316 7317 /** 7318 * @brief map link keys to authenticated 7319 */ 7320 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7321 switch (link_key_type){ 7322 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7323 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7324 return true; 7325 default: 7326 return false; 7327 } 7328 } 7329 7330 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7331 log_info("gap_mitm_protection_required_for_security_level %u", level); 7332 return level > LEVEL_2; 7333 } 7334 7335 /** 7336 * @brief get current security level 7337 */ 7338 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7339 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7340 if (!connection) return LEVEL_0; 7341 return gap_security_level_for_connection(connection); 7342 } 7343 7344 /** 7345 * @brief request connection to device to 7346 * @result GAP_AUTHENTICATION_RESULT 7347 */ 7348 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7349 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7350 if (!connection){ 7351 hci_emit_security_level(con_handle, LEVEL_0); 7352 return; 7353 } 7354 7355 btstack_assert(hci_is_le_connection(connection) == false); 7356 7357 // 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) 7358 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7359 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7360 requested_level = LEVEL_4; 7361 } 7362 7363 gap_security_level_t current_level = gap_security_level(con_handle); 7364 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7365 requested_level, connection->requested_security_level, current_level); 7366 7367 // authentication active if authentication request was sent or planned level > 0 7368 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7369 if (authentication_active){ 7370 // authentication already active 7371 if (connection->requested_security_level < requested_level){ 7372 // increase requested level as new level is higher 7373 // TODO: handle re-authentication when done 7374 connection->requested_security_level = requested_level; 7375 } 7376 } else { 7377 // no request active, notify if security sufficient 7378 if (requested_level <= current_level){ 7379 hci_emit_security_level(con_handle, current_level); 7380 return; 7381 } 7382 7383 // store request 7384 connection->requested_security_level = requested_level; 7385 7386 // start to authenticate connection 7387 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7388 7389 // request remote features if not already active, also trigger hci_run 7390 hci_remote_features_query(con_handle); 7391 } 7392 } 7393 7394 /** 7395 * @brief start dedicated bonding with device. disconnect after bonding 7396 * @param device 7397 * @param request MITM protection 7398 * @result GAP_DEDICATED_BONDING_COMPLETE 7399 */ 7400 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7401 7402 // create connection state machine 7403 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7404 7405 if (!connection){ 7406 return BTSTACK_MEMORY_ALLOC_FAILED; 7407 } 7408 7409 // delete linkn key 7410 gap_drop_link_key_for_bd_addr(device); 7411 7412 // configure LEVEL_2/3, dedicated bonding 7413 connection->state = SEND_CREATE_CONNECTION; 7414 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7415 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7416 connection->bonding_flags = BONDING_DEDICATED; 7417 7418 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7419 7420 // handle: connnection failure (connection complete != ok) 7421 // handle: authentication failure 7422 // handle: disconnect on done 7423 7424 hci_run(); 7425 7426 return 0; 7427 } 7428 7429 void gap_set_local_name(const char * local_name){ 7430 hci_stack->local_name = local_name; 7431 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7432 // also update EIR if not set by user 7433 if (hci_stack->eir_data == NULL){ 7434 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7435 } 7436 hci_run(); 7437 } 7438 #endif 7439 7440 7441 #ifdef ENABLE_BLE 7442 7443 #ifdef ENABLE_LE_CENTRAL 7444 void gap_start_scan(void){ 7445 hci_stack->le_scanning_enabled = true; 7446 hci_run(); 7447 } 7448 7449 void gap_stop_scan(void){ 7450 hci_stack->le_scanning_enabled = false; 7451 hci_run(); 7452 } 7453 7454 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7455 hci_stack->le_scan_type = scan_type; 7456 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7457 hci_stack->le_scan_interval = scan_interval; 7458 hci_stack->le_scan_window = scan_window; 7459 hci_stack->le_scanning_param_update = true; 7460 hci_run(); 7461 } 7462 7463 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7464 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7465 } 7466 7467 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7468 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7469 if (!conn){ 7470 // disallow if le connection is already outgoing 7471 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7472 log_error("le connection already active"); 7473 return ERROR_CODE_COMMAND_DISALLOWED; 7474 } 7475 7476 log_info("gap_connect: no connection exists yet, creating context"); 7477 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7478 if (!conn){ 7479 // notify client that alloc failed 7480 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7481 log_info("gap_connect: failed to alloc hci_connection_t"); 7482 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7483 } 7484 7485 // set le connecting state 7486 if (hci_is_le_connection_type(addr_type)){ 7487 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7488 } 7489 7490 conn->state = SEND_CREATE_CONNECTION; 7491 log_info("gap_connect: send create connection next"); 7492 hci_run(); 7493 return ERROR_CODE_SUCCESS; 7494 } 7495 7496 if (!hci_is_le_connection(conn) || 7497 (conn->state == SEND_CREATE_CONNECTION) || 7498 (conn->state == SENT_CREATE_CONNECTION)) { 7499 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7500 log_error("gap_connect: classic connection or connect is already being created"); 7501 return GATT_CLIENT_IN_WRONG_STATE; 7502 } 7503 7504 // check if connection was just disconnected 7505 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7506 log_info("gap_connect: send create connection (again)"); 7507 conn->state = SEND_CREATE_CONNECTION; 7508 hci_run(); 7509 return ERROR_CODE_SUCCESS; 7510 } 7511 7512 log_info("gap_connect: context exists with state %u", conn->state); 7513 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7514 hci_run(); 7515 return ERROR_CODE_SUCCESS; 7516 } 7517 7518 // @assumption: only a single outgoing LE Connection exists 7519 static hci_connection_t * gap_get_outgoing_connection(void){ 7520 btstack_linked_item_t *it; 7521 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7522 hci_connection_t * conn = (hci_connection_t *) it; 7523 if (!hci_is_le_connection(conn)) continue; 7524 switch (conn->state){ 7525 case SEND_CREATE_CONNECTION: 7526 case SENT_CREATE_CONNECTION: 7527 return conn; 7528 default: 7529 break; 7530 }; 7531 } 7532 return NULL; 7533 } 7534 7535 uint8_t gap_connect_cancel(void){ 7536 hci_connection_t * conn; 7537 switch (hci_stack->le_connecting_request){ 7538 case LE_CONNECTING_IDLE: 7539 break; 7540 case LE_CONNECTING_WHITELIST: 7541 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7542 hci_run(); 7543 break; 7544 case LE_CONNECTING_DIRECT: 7545 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7546 conn = gap_get_outgoing_connection(); 7547 if (conn == NULL){ 7548 hci_run(); 7549 } else { 7550 switch (conn->state){ 7551 case SEND_CREATE_CONNECTION: 7552 // skip sending create connection and emit event instead 7553 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7554 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7555 btstack_memory_hci_connection_free( conn ); 7556 break; 7557 case SENT_CREATE_CONNECTION: 7558 // let hci_run_general_gap_le cancel outgoing connection 7559 hci_run(); 7560 break; 7561 default: 7562 break; 7563 } 7564 } 7565 break; 7566 default: 7567 btstack_unreachable(); 7568 break; 7569 } 7570 return ERROR_CODE_SUCCESS; 7571 } 7572 7573 /** 7574 * @brief Set connection parameters for outgoing connections 7575 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7576 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7577 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7578 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7579 * @param conn_latency, default: 4 7580 * @param supervision_timeout (unit: 10ms), default: 720 ms 7581 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7582 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7583 */ 7584 7585 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7586 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7587 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7588 hci_stack->le_connection_scan_interval = conn_scan_interval; 7589 hci_stack->le_connection_scan_window = conn_scan_window; 7590 hci_stack->le_connection_interval_min = conn_interval_min; 7591 hci_stack->le_connection_interval_max = conn_interval_max; 7592 hci_stack->le_connection_latency = conn_latency; 7593 hci_stack->le_supervision_timeout = supervision_timeout; 7594 hci_stack->le_minimum_ce_length = min_ce_length; 7595 hci_stack->le_maximum_ce_length = max_ce_length; 7596 } 7597 #endif 7598 7599 /** 7600 * @brief Updates the connection parameters for a given LE connection 7601 * @param handle 7602 * @param conn_interval_min (unit: 1.25ms) 7603 * @param conn_interval_max (unit: 1.25ms) 7604 * @param conn_latency 7605 * @param supervision_timeout (unit: 10ms) 7606 * @return 0 if ok 7607 */ 7608 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7609 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7610 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7611 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7612 connection->le_conn_interval_min = conn_interval_min; 7613 connection->le_conn_interval_max = conn_interval_max; 7614 connection->le_conn_latency = conn_latency; 7615 connection->le_supervision_timeout = supervision_timeout; 7616 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7617 hci_run(); 7618 return 0; 7619 } 7620 7621 /** 7622 * @brief Request an update of the connection parameter for a given LE connection 7623 * @param handle 7624 * @param conn_interval_min (unit: 1.25ms) 7625 * @param conn_interval_max (unit: 1.25ms) 7626 * @param conn_latency 7627 * @param supervision_timeout (unit: 10ms) 7628 * @return 0 if ok 7629 */ 7630 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7631 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7632 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7633 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7634 connection->le_conn_interval_min = conn_interval_min; 7635 connection->le_conn_interval_max = conn_interval_max; 7636 connection->le_conn_latency = conn_latency; 7637 connection->le_supervision_timeout = supervision_timeout; 7638 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7639 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7640 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7641 return 0; 7642 } 7643 7644 #ifdef ENABLE_LE_PERIPHERAL 7645 7646 /** 7647 * @brief Set Advertisement Data 7648 * @param advertising_data_length 7649 * @param advertising_data (max 31 octets) 7650 * @note data is not copied, pointer has to stay valid 7651 */ 7652 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7653 hci_stack->le_advertisements_data_len = advertising_data_length; 7654 hci_stack->le_advertisements_data = advertising_data; 7655 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7656 hci_run(); 7657 } 7658 7659 /** 7660 * @brief Set Scan Response Data 7661 * @param advertising_data_length 7662 * @param advertising_data (max 31 octets) 7663 * @note data is not copied, pointer has to stay valid 7664 */ 7665 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7666 hci_stack->le_scan_response_data_len = scan_response_data_length; 7667 hci_stack->le_scan_response_data = scan_response_data; 7668 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7669 hci_run(); 7670 } 7671 7672 /** 7673 * @brief Set Advertisement Parameters 7674 * @param adv_int_min 7675 * @param adv_int_max 7676 * @param adv_type 7677 * @param direct_address_type 7678 * @param direct_address 7679 * @param channel_map 7680 * @param filter_policy 7681 * 7682 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7683 */ 7684 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7685 uint8_t direct_address_typ, bd_addr_t direct_address, 7686 uint8_t channel_map, uint8_t filter_policy) { 7687 7688 hci_stack->le_advertisements_interval_min = adv_int_min; 7689 hci_stack->le_advertisements_interval_max = adv_int_max; 7690 hci_stack->le_advertisements_type = adv_type; 7691 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7692 hci_stack->le_advertisements_channel_map = channel_map; 7693 hci_stack->le_advertisements_filter_policy = filter_policy; 7694 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7695 6); 7696 7697 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7698 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7699 hci_run(); 7700 } 7701 7702 /** 7703 * @brief Enable/Disable Advertisements 7704 * @param enabled 7705 */ 7706 void gap_advertisements_enable(int enabled){ 7707 if (enabled == 0){ 7708 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7709 } else { 7710 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7711 } 7712 hci_update_advertisements_enabled_for_current_roles(); 7713 hci_run(); 7714 } 7715 7716 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7717 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7718 btstack_linked_list_iterator_t it; 7719 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7720 while (btstack_linked_list_iterator_has_next(&it)){ 7721 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7722 if ( item->advertising_handle == advertising_handle ) { 7723 return item; 7724 } 7725 } 7726 return NULL; 7727 } 7728 7729 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7730 // find free advertisement handle 7731 uint8_t advertisement_handle; 7732 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7733 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7734 } 7735 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7736 // clear 7737 memset(storage, 0, sizeof(le_advertising_set_t)); 7738 // copy params 7739 storage->advertising_handle = advertisement_handle; 7740 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7741 // add to list 7742 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7743 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7744 *out_advertising_handle = advertisement_handle; 7745 // set tasks and start 7746 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7747 hci_run(); 7748 return ERROR_CODE_SUCCESS; 7749 } 7750 7751 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7752 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7753 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7754 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7755 // set tasks and start 7756 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7757 hci_run(); 7758 return ERROR_CODE_SUCCESS; 7759 } 7760 7761 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7762 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7763 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7764 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7765 return ERROR_CODE_SUCCESS; 7766 } 7767 7768 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7769 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7770 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7771 memcpy(advertising_set->random_address, random_address, 6); 7772 // set tasks and start 7773 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7774 hci_run(); 7775 return ERROR_CODE_SUCCESS; 7776 } 7777 7778 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7779 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7780 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7781 advertising_set->adv_data = advertising_data; 7782 advertising_set->adv_data_len = advertising_data_length; 7783 // set tasks and start 7784 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7785 hci_run(); 7786 return ERROR_CODE_SUCCESS; 7787 } 7788 7789 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){ 7790 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7791 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7792 advertising_set->scan_data = scan_response_data; 7793 advertising_set->scan_data_len = scan_response_data_length; 7794 // set tasks and start 7795 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7796 hci_run(); 7797 return ERROR_CODE_SUCCESS; 7798 } 7799 7800 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7801 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7802 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7803 advertising_set->enable_timeout = timeout; 7804 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7805 // set tasks and start 7806 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7807 hci_run(); 7808 return ERROR_CODE_SUCCESS; 7809 } 7810 7811 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7812 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7813 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7814 // set tasks and start 7815 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7816 hci_run(); 7817 return ERROR_CODE_SUCCESS; 7818 } 7819 7820 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7821 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7822 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7823 // set tasks and start 7824 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7825 hci_run(); 7826 return ERROR_CODE_SUCCESS; 7827 } 7828 7829 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7830 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7831 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7832 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7833 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7834 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7835 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7836 // set tasks and start 7837 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7838 hci_run(); 7839 return ERROR_CODE_SUCCESS; 7840 } 7841 7842 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7843 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7844 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7845 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7846 return ERROR_CODE_SUCCESS; 7847 } 7848 7849 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7850 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7851 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7852 advertising_set->periodic_data = periodic_data; 7853 advertising_set->periodic_data_len = periodic_data_length; 7854 // set tasks and start 7855 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7856 hci_run(); 7857 return ERROR_CODE_SUCCESS; 7858 } 7859 7860 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7861 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7862 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7863 // set tasks and start 7864 advertising_set->periodic_include_adi = include_adi; 7865 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7866 hci_run(); 7867 return ERROR_CODE_SUCCESS; 7868 } 7869 7870 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7871 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7872 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7873 // set tasks and start 7874 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7875 hci_run(); 7876 return ERROR_CODE_SUCCESS; 7877 } 7878 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7879 7880 #endif 7881 7882 #endif 7883 7884 void hci_le_set_own_address_type(uint8_t own_address_type){ 7885 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7886 if (own_address_type == hci_stack->le_own_addr_type) return; 7887 hci_stack->le_own_addr_type = own_address_type; 7888 7889 #ifdef ENABLE_LE_PERIPHERAL 7890 // update advertisement parameters, too 7891 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7892 hci_run(); 7893 #endif 7894 #ifdef ENABLE_LE_CENTRAL 7895 // note: we don't update scan parameters or modify ongoing connection attempts 7896 #endif 7897 } 7898 7899 void hci_le_random_address_set(const bd_addr_t random_address){ 7900 memcpy(hci_stack->le_random_address, random_address, 6); 7901 hci_stack->le_random_address_set = true; 7902 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7903 hci_run(); 7904 } 7905 7906 #endif 7907 7908 uint8_t gap_disconnect(hci_con_handle_t handle){ 7909 hci_connection_t * conn = hci_connection_for_handle(handle); 7910 if (!conn){ 7911 hci_emit_disconnection_complete(handle, 0); 7912 return 0; 7913 } 7914 // ignore if already disconnected 7915 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7916 return 0; 7917 } 7918 conn->state = SEND_DISCONNECT; 7919 hci_run(); 7920 return 0; 7921 } 7922 7923 int gap_read_rssi(hci_con_handle_t con_handle){ 7924 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7925 if (hci_connection == NULL) return 0; 7926 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7927 hci_run(); 7928 return 1; 7929 } 7930 7931 /** 7932 * @brief Get connection type 7933 * @param con_handle 7934 * @result connection_type 7935 */ 7936 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7937 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7938 if (!conn) return GAP_CONNECTION_INVALID; 7939 switch (conn->address_type){ 7940 case BD_ADDR_TYPE_LE_PUBLIC: 7941 case BD_ADDR_TYPE_LE_RANDOM: 7942 return GAP_CONNECTION_LE; 7943 case BD_ADDR_TYPE_SCO: 7944 return GAP_CONNECTION_SCO; 7945 case BD_ADDR_TYPE_ACL: 7946 return GAP_CONNECTION_ACL; 7947 default: 7948 return GAP_CONNECTION_INVALID; 7949 } 7950 } 7951 7952 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7953 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7954 if (!conn) return HCI_ROLE_INVALID; 7955 return (hci_role_t) conn->role; 7956 } 7957 7958 7959 #ifdef ENABLE_CLASSIC 7960 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7961 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7962 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7963 conn->request_role = role; 7964 hci_run(); 7965 return ERROR_CODE_SUCCESS; 7966 } 7967 #endif 7968 7969 #ifdef ENABLE_BLE 7970 7971 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){ 7972 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7973 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7974 7975 conn->le_phy_update_all_phys = all_phys; 7976 conn->le_phy_update_tx_phys = tx_phys; 7977 conn->le_phy_update_rx_phys = rx_phys; 7978 conn->le_phy_update_phy_options = phy_options; 7979 7980 hci_run(); 7981 7982 return 0; 7983 } 7984 7985 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7986 // check if already in list 7987 btstack_linked_list_iterator_t it; 7988 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 7989 while (btstack_linked_list_iterator_has_next(&it)) { 7990 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 7991 if (entry->address_type != address_type) { 7992 continue; 7993 } 7994 if (memcmp(entry->address, address, 6) != 0) { 7995 continue; 7996 } 7997 // disallow if already scheduled to add 7998 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 7999 return ERROR_CODE_COMMAND_DISALLOWED; 8000 } 8001 // still on controller, but scheduled to remove -> re-add 8002 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8003 return ERROR_CODE_SUCCESS; 8004 } 8005 // alloc and add to list 8006 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8007 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8008 entry->address_type = address_type; 8009 (void)memcpy(entry->address, address, 6); 8010 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8011 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8012 return ERROR_CODE_SUCCESS; 8013 } 8014 8015 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8016 btstack_linked_list_iterator_t it; 8017 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8018 while (btstack_linked_list_iterator_has_next(&it)){ 8019 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8020 if (entry->address_type != address_type) { 8021 continue; 8022 } 8023 if (memcmp(entry->address, address, 6) != 0) { 8024 continue; 8025 } 8026 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8027 // remove from controller if already present 8028 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8029 } else { 8030 // directly remove entry from whitelist 8031 btstack_linked_list_iterator_remove(&it); 8032 btstack_memory_whitelist_entry_free(entry); 8033 } 8034 return ERROR_CODE_SUCCESS; 8035 } 8036 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8037 } 8038 8039 static void hci_whitelist_clear(void){ 8040 btstack_linked_list_iterator_t it; 8041 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8042 while (btstack_linked_list_iterator_has_next(&it)){ 8043 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8044 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8045 // remove from controller if already present 8046 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8047 continue; 8048 } 8049 // directly remove entry from whitelist 8050 btstack_linked_list_iterator_remove(&it); 8051 btstack_memory_whitelist_entry_free(entry); 8052 } 8053 } 8054 8055 // free all entries unconditionally 8056 static void hci_whitelist_free(void){ 8057 btstack_linked_list_iterator_t lit; 8058 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 8059 while (btstack_linked_list_iterator_has_next(&lit)){ 8060 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 8061 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 8062 btstack_memory_whitelist_entry_free(entry); 8063 } 8064 } 8065 8066 /** 8067 * @brief Clear Whitelist 8068 * @return 0 if ok 8069 */ 8070 uint8_t gap_whitelist_clear(void){ 8071 hci_whitelist_clear(); 8072 hci_run(); 8073 return ERROR_CODE_SUCCESS; 8074 } 8075 8076 /** 8077 * @brief Add Device to Whitelist 8078 * @param address_typ 8079 * @param address 8080 * @return 0 if ok 8081 */ 8082 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8083 uint8_t status = hci_whitelist_add(address_type, address); 8084 if (status){ 8085 return status; 8086 } 8087 hci_run(); 8088 return ERROR_CODE_SUCCESS; 8089 } 8090 8091 /** 8092 * @brief Remove Device from Whitelist 8093 * @param address_typ 8094 * @param address 8095 * @return 0 if ok 8096 */ 8097 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8098 uint8_t status = hci_whitelist_remove(address_type, address); 8099 if (status){ 8100 return status; 8101 } 8102 hci_run(); 8103 return ERROR_CODE_SUCCESS; 8104 } 8105 8106 #ifdef ENABLE_LE_CENTRAL 8107 /** 8108 * @brief Connect with Whitelist 8109 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8110 * @return - if ok 8111 */ 8112 uint8_t gap_connect_with_whitelist(void){ 8113 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8114 return ERROR_CODE_COMMAND_DISALLOWED; 8115 } 8116 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8117 hci_run(); 8118 return ERROR_CODE_SUCCESS; 8119 } 8120 8121 /** 8122 * @brief Auto Connection Establishment - Start Connecting to device 8123 * @param address_typ 8124 * @param address 8125 * @return 0 if ok 8126 */ 8127 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8128 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8129 return ERROR_CODE_COMMAND_DISALLOWED; 8130 } 8131 8132 uint8_t status = hci_whitelist_add(address_type, address); 8133 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8134 return status; 8135 } 8136 8137 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8138 8139 hci_run(); 8140 return ERROR_CODE_SUCCESS; 8141 } 8142 8143 /** 8144 * @brief Auto Connection Establishment - Stop Connecting to device 8145 * @param address_typ 8146 * @param address 8147 * @return 0 if ok 8148 */ 8149 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8150 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8151 return ERROR_CODE_COMMAND_DISALLOWED; 8152 } 8153 8154 hci_whitelist_remove(address_type, address); 8155 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8156 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8157 } 8158 hci_run(); 8159 return 0; 8160 } 8161 8162 /** 8163 * @brief Auto Connection Establishment - Stop everything 8164 * @note Convenience function to stop all active auto connection attempts 8165 */ 8166 uint8_t gap_auto_connection_stop_all(void){ 8167 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8168 return ERROR_CODE_COMMAND_DISALLOWED; 8169 } 8170 hci_whitelist_clear(); 8171 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8172 hci_run(); 8173 return ERROR_CODE_SUCCESS; 8174 } 8175 8176 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8177 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8178 if (!conn) return 0; 8179 return conn->le_connection_interval; 8180 } 8181 #endif 8182 #endif 8183 8184 #ifdef ENABLE_CLASSIC 8185 /** 8186 * @brief Set Extended Inquiry Response data 8187 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8188 * @note has to be done before stack starts up 8189 */ 8190 void gap_set_extended_inquiry_response(const uint8_t * data){ 8191 hci_stack->eir_data = data; 8192 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8193 hci_run(); 8194 } 8195 8196 /** 8197 * @brief Start GAP Classic Inquiry 8198 * @param duration in 1.28s units 8199 * @return 0 if ok 8200 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8201 */ 8202 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8203 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8204 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8205 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8206 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8207 } 8208 hci_stack->inquiry_state = duration_in_1280ms_units; 8209 hci_stack->inquiry_max_period_length = 0; 8210 hci_stack->inquiry_min_period_length = 0; 8211 hci_run(); 8212 return 0; 8213 } 8214 8215 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8216 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8217 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8218 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8219 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8220 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8221 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8222 8223 hci_stack->inquiry_state = duration; 8224 hci_stack->inquiry_max_period_length = max_period_length; 8225 hci_stack->inquiry_min_period_length = min_period_length; 8226 hci_run(); 8227 return 0; 8228 } 8229 8230 /** 8231 * @brief Stop GAP Classic Inquiry 8232 * @return 0 if ok 8233 */ 8234 int gap_inquiry_stop(void){ 8235 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8236 // emit inquiry complete event, before it even started 8237 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8238 hci_emit_event(event, sizeof(event), 1); 8239 return 0; 8240 } 8241 switch (hci_stack->inquiry_state){ 8242 case GAP_INQUIRY_STATE_ACTIVE: 8243 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8244 hci_run(); 8245 return ERROR_CODE_SUCCESS; 8246 case GAP_INQUIRY_STATE_PERIODIC: 8247 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8248 hci_run(); 8249 return ERROR_CODE_SUCCESS; 8250 default: 8251 return ERROR_CODE_COMMAND_DISALLOWED; 8252 } 8253 } 8254 8255 void gap_inquiry_set_lap(uint32_t lap){ 8256 hci_stack->inquiry_lap = lap; 8257 } 8258 8259 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8260 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8261 hci_stack->inquiry_scan_window = inquiry_scan_window; 8262 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8263 hci_run(); 8264 } 8265 8266 8267 /** 8268 * @brief Remote Name Request 8269 * @param addr 8270 * @param page_scan_repetition_mode 8271 * @param clock_offset only used when bit 15 is set 8272 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8273 */ 8274 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8275 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8276 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8277 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8278 hci_stack->remote_name_clock_offset = clock_offset; 8279 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8280 hci_run(); 8281 return 0; 8282 } 8283 8284 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8285 hci_stack->gap_pairing_state = state; 8286 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8287 hci_run(); 8288 return 0; 8289 } 8290 8291 /** 8292 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8293 * @param addr 8294 * @param pin_data 8295 * @param pin_len 8296 * @return 0 if ok 8297 */ 8298 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8299 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8300 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8301 hci_stack->gap_pairing_pin_len = pin_len; 8302 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8303 } 8304 8305 /** 8306 * @brief Legacy Pairing Pin Code Response 8307 * @param addr 8308 * @param pin 8309 * @return 0 if ok 8310 */ 8311 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8312 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8313 } 8314 8315 /** 8316 * @brief Abort Legacy Pairing 8317 * @param addr 8318 * @param pin 8319 * @return 0 if ok 8320 */ 8321 int gap_pin_code_negative(bd_addr_t addr){ 8322 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8323 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8324 } 8325 8326 /** 8327 * @brief SSP Passkey Response 8328 * @param addr 8329 * @param passkey 8330 * @return 0 if ok 8331 */ 8332 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8333 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8334 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8335 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8336 } 8337 8338 /** 8339 * @brief Abort SSP Passkey Entry/Pairing 8340 * @param addr 8341 * @param pin 8342 * @return 0 if ok 8343 */ 8344 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8345 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8346 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8347 } 8348 8349 /** 8350 * @brief Accept SSP Numeric Comparison 8351 * @param addr 8352 * @param passkey 8353 * @return 0 if ok 8354 */ 8355 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8356 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8357 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8358 } 8359 8360 /** 8361 * @brief Abort SSP Numeric Comparison/Pairing 8362 * @param addr 8363 * @param pin 8364 * @return 0 if ok 8365 */ 8366 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8367 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8368 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8369 } 8370 8371 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8372 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8374 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8375 connectionSetAuthenticationFlags(conn, flag); 8376 hci_run(); 8377 return ERROR_CODE_SUCCESS; 8378 } 8379 #endif 8380 8381 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8382 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8383 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8384 } 8385 8386 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8387 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8388 } 8389 #endif 8390 8391 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8392 /** 8393 * @brief Report Remote OOB Data 8394 * @param bd_addr 8395 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8396 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8397 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8398 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8399 */ 8400 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){ 8401 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8402 if (connection == NULL) { 8403 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8404 } 8405 connection->classic_oob_c_192 = c_192; 8406 connection->classic_oob_r_192 = r_192; 8407 8408 // ignore P-256 if not supported by us 8409 if (hci_stack->secure_connections_active){ 8410 connection->classic_oob_c_256 = c_256; 8411 connection->classic_oob_r_256 = r_256; 8412 } 8413 8414 return ERROR_CODE_SUCCESS; 8415 } 8416 /** 8417 * @brief Generate new OOB data 8418 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8419 */ 8420 void gap_ssp_generate_oob_data(void){ 8421 hci_stack->classic_read_local_oob_data = true; 8422 hci_run(); 8423 } 8424 8425 #endif 8426 8427 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8428 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8429 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8430 if (connection == NULL) { 8431 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8432 } 8433 8434 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8435 connection->link_key_type = type; 8436 8437 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8438 } 8439 8440 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8441 /** 8442 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8443 * @param inquiry_mode see bluetooth_defines.h 8444 */ 8445 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8446 hci_stack->inquiry_mode = inquiry_mode; 8447 } 8448 8449 /** 8450 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8451 */ 8452 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8453 hci_stack->sco_voice_setting = voice_setting; 8454 } 8455 8456 /** 8457 * @brief Get SCO Voice Setting 8458 * @return current voice setting 8459 */ 8460 uint16_t hci_get_sco_voice_setting(void){ 8461 return hci_stack->sco_voice_setting; 8462 } 8463 8464 static int hci_have_usb_transport(void){ 8465 if (!hci_stack->hci_transport) return 0; 8466 const char * transport_name = hci_stack->hci_transport->name; 8467 if (!transport_name) return 0; 8468 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8469 } 8470 8471 /** @brief Get SCO packet length for current SCO Voice setting 8472 * @note Using SCO packets of the exact length is required for USB transfer 8473 * @return Length of SCO packets in bytes (not audio frames) 8474 */ 8475 uint16_t hci_get_sco_packet_length(void){ 8476 uint16_t sco_packet_length = 0; 8477 8478 #ifdef ENABLE_SCO_OVER_HCI 8479 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8480 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8481 8482 if (hci_have_usb_transport()){ 8483 // see Core Spec for H2 USB Transfer. 8484 // 3 byte SCO header + 24 bytes per connection 8485 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8486 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8487 } else { 8488 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8489 sco_packet_length = 3 + 60 * multiplier; 8490 // assert that it still fits inside an SCO buffer 8491 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8492 sco_packet_length = 3 + 60; 8493 } 8494 } 8495 #endif 8496 8497 #ifdef HAVE_SCO_TRANSPORT 8498 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8499 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8500 sco_packet_length = 3 + 60 * multiplier; 8501 #endif 8502 return sco_packet_length; 8503 } 8504 8505 /** 8506 * @brief Sets the master/slave policy 8507 * @param policy (0: attempt to become master, 1: let connecting device decide) 8508 */ 8509 void hci_set_master_slave_policy(uint8_t policy){ 8510 hci_stack->master_slave_policy = policy; 8511 } 8512 8513 #endif 8514 8515 HCI_STATE hci_get_state(void){ 8516 return hci_stack->state; 8517 } 8518 8519 #ifdef ENABLE_CLASSIC 8520 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8521 hci_stack->gap_classic_accept_callback = accept_callback; 8522 } 8523 #endif 8524 8525 /** 8526 * @brief Set callback for Bluetooth Hardware Error 8527 */ 8528 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8529 hci_stack->hardware_error_callback = fn; 8530 } 8531 8532 void hci_disconnect_all(void){ 8533 btstack_linked_list_iterator_t it; 8534 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8535 while (btstack_linked_list_iterator_has_next(&it)){ 8536 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8537 if (con->state == SENT_DISCONNECT) continue; 8538 con->state = SEND_DISCONNECT; 8539 } 8540 hci_run(); 8541 } 8542 8543 uint16_t hci_get_manufacturer(void){ 8544 return hci_stack->manufacturer; 8545 } 8546 8547 #ifdef ENABLE_BLE 8548 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8549 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8550 if (!hci_con) return NULL; 8551 return &hci_con->sm_connection; 8552 } 8553 8554 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8555 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8556 #endif 8557 8558 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8559 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8560 if (hci_connection == NULL) return 0; 8561 if (hci_is_le_connection(hci_connection)){ 8562 #ifdef ENABLE_BLE 8563 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8564 if (sm_conn->sm_connection_encrypted) { 8565 return sm_conn->sm_actual_encryption_key_size; 8566 } 8567 #endif 8568 } else { 8569 #ifdef ENABLE_CLASSIC 8570 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8571 return hci_connection->encryption_key_size; 8572 } 8573 #endif 8574 } 8575 return 0; 8576 } 8577 8578 bool gap_authenticated(hci_con_handle_t con_handle){ 8579 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8580 if (hci_connection == NULL) return false; 8581 8582 switch (hci_connection->address_type){ 8583 #ifdef ENABLE_BLE 8584 case BD_ADDR_TYPE_LE_PUBLIC: 8585 case BD_ADDR_TYPE_LE_RANDOM: 8586 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8587 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8588 #endif 8589 #ifdef ENABLE_CLASSIC 8590 case BD_ADDR_TYPE_SCO: 8591 case BD_ADDR_TYPE_ACL: 8592 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8593 #endif 8594 default: 8595 return false; 8596 } 8597 } 8598 8599 bool gap_secure_connection(hci_con_handle_t con_handle){ 8600 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8601 if (hci_connection == NULL) return 0; 8602 8603 switch (hci_connection->address_type){ 8604 #ifdef ENABLE_BLE 8605 case BD_ADDR_TYPE_LE_PUBLIC: 8606 case BD_ADDR_TYPE_LE_RANDOM: 8607 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8608 return hci_connection->sm_connection.sm_connection_sc != 0; 8609 #endif 8610 #ifdef ENABLE_CLASSIC 8611 case BD_ADDR_TYPE_SCO: 8612 case BD_ADDR_TYPE_ACL: 8613 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8614 #endif 8615 default: 8616 return false; 8617 } 8618 } 8619 8620 bool gap_bonded(hci_con_handle_t con_handle){ 8621 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8622 if (hci_connection == NULL) return 0; 8623 8624 #ifdef ENABLE_CLASSIC 8625 link_key_t link_key; 8626 link_key_type_t link_key_type; 8627 #endif 8628 switch (hci_connection->address_type){ 8629 #ifdef ENABLE_BLE 8630 case BD_ADDR_TYPE_LE_PUBLIC: 8631 case BD_ADDR_TYPE_LE_RANDOM: 8632 return hci_connection->sm_connection.sm_le_db_index >= 0; 8633 #endif 8634 #ifdef ENABLE_CLASSIC 8635 case BD_ADDR_TYPE_SCO: 8636 case BD_ADDR_TYPE_ACL: 8637 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8638 #endif 8639 default: 8640 return false; 8641 } 8642 } 8643 8644 #ifdef ENABLE_BLE 8645 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8646 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8647 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8648 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8649 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8650 return sm_conn->sm_connection_authorization_state; 8651 } 8652 #endif 8653 8654 #ifdef ENABLE_CLASSIC 8655 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){ 8656 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8657 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8658 conn->sniff_min_interval = sniff_min_interval; 8659 conn->sniff_max_interval = sniff_max_interval; 8660 conn->sniff_attempt = sniff_attempt; 8661 conn->sniff_timeout = sniff_timeout; 8662 hci_run(); 8663 return 0; 8664 } 8665 8666 /** 8667 * @brief Exit Sniff mode 8668 * @param con_handle 8669 @ @return 0 if ok 8670 */ 8671 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8672 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8673 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8674 conn->sniff_min_interval = 0xffff; 8675 hci_run(); 8676 return 0; 8677 } 8678 8679 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){ 8680 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8681 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8682 conn->sniff_subrating_max_latency = max_latency; 8683 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8684 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8685 hci_run(); 8686 return ERROR_CODE_SUCCESS; 8687 } 8688 8689 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){ 8690 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8691 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8692 conn->qos_service_type = service_type; 8693 conn->qos_token_rate = token_rate; 8694 conn->qos_peak_bandwidth = peak_bandwidth; 8695 conn->qos_latency = latency; 8696 conn->qos_delay_variation = delay_variation; 8697 hci_run(); 8698 return ERROR_CODE_SUCCESS; 8699 } 8700 8701 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8702 hci_stack->new_page_scan_interval = page_scan_interval; 8703 hci_stack->new_page_scan_window = page_scan_window; 8704 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8705 hci_run(); 8706 } 8707 8708 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8709 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8710 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8711 hci_run(); 8712 } 8713 8714 void gap_set_page_timeout(uint16_t page_timeout){ 8715 hci_stack->page_timeout = page_timeout; 8716 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8717 hci_run(); 8718 } 8719 8720 #endif 8721 8722 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8723 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8724 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8725 if (le_device_db_index >= le_device_db_max_count()) return; 8726 uint8_t offset = le_device_db_index >> 3; 8727 uint8_t mask = 1 << (le_device_db_index & 7); 8728 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8729 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8730 // note: go back to remove entries, otherwise, a remove + add will skip the add 8731 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8732 } 8733 } 8734 8735 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8736 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8737 if (le_device_db_index >= le_device_db_max_count()) return; 8738 uint8_t offset = le_device_db_index >> 3; 8739 uint8_t mask = 1 << (le_device_db_index & 7); 8740 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8741 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8742 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8743 } 8744 } 8745 8746 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8747 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8748 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8749 } 8750 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8751 // restart le resolving list update 8752 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8753 } 8754 return ERROR_CODE_SUCCESS; 8755 } 8756 #endif 8757 8758 #ifdef ENABLE_BLE 8759 #ifdef ENABLE_LE_CENTRAL 8760 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8761 8762 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8763 // check if already in list 8764 btstack_linked_list_iterator_t it; 8765 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8766 while (btstack_linked_list_iterator_has_next(&it)) { 8767 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8768 if (entry->sid != advertising_sid) { 8769 continue; 8770 } 8771 if (entry->address_type != address_type) { 8772 continue; 8773 } 8774 if (memcmp(entry->address, address, 6) != 0) { 8775 continue; 8776 } 8777 // disallow if already scheduled to add 8778 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8779 return ERROR_CODE_COMMAND_DISALLOWED; 8780 } 8781 // still on controller, but scheduled to remove -> re-add 8782 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8783 return ERROR_CODE_SUCCESS; 8784 } 8785 // alloc and add to list 8786 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8787 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8788 entry->sid = advertising_sid; 8789 entry->address_type = address_type; 8790 (void)memcpy(entry->address, address, 6); 8791 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8792 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8793 return ERROR_CODE_SUCCESS; 8794 } 8795 8796 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8797 btstack_linked_list_iterator_t it; 8798 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8799 while (btstack_linked_list_iterator_has_next(&it)){ 8800 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8801 if (entry->sid != advertising_sid) { 8802 continue; 8803 } 8804 if (entry->address_type != address_type) { 8805 continue; 8806 } 8807 if (memcmp(entry->address, address, 6) != 0) { 8808 continue; 8809 } 8810 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8811 // remove from controller if already present 8812 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8813 } else { 8814 // directly remove entry from whitelist 8815 btstack_linked_list_iterator_remove(&it); 8816 btstack_memory_periodic_advertiser_list_entry_free(entry); 8817 } 8818 return ERROR_CODE_SUCCESS; 8819 } 8820 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8821 } 8822 8823 static void hci_periodic_advertiser_list_clear(void){ 8824 btstack_linked_list_iterator_t it; 8825 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8826 while (btstack_linked_list_iterator_has_next(&it)){ 8827 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8828 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8829 // remove from controller if already present 8830 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8831 continue; 8832 } 8833 // directly remove entry from whitelist 8834 btstack_linked_list_iterator_remove(&it); 8835 btstack_memory_periodic_advertiser_list_entry_free(entry); 8836 } 8837 } 8838 8839 // free all entries unconditionally 8840 static void hci_periodic_advertiser_list_free(void){ 8841 btstack_linked_list_iterator_t lit; 8842 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8843 while (btstack_linked_list_iterator_has_next(&lit)){ 8844 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8845 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8846 btstack_memory_periodic_advertiser_list_entry_free(entry); 8847 } 8848 } 8849 8850 uint8_t gap_periodic_advertiser_list_clear(void){ 8851 hci_periodic_advertiser_list_clear(); 8852 hci_run(); 8853 return ERROR_CODE_SUCCESS; 8854 } 8855 8856 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8857 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8858 if (status){ 8859 return status; 8860 } 8861 hci_run(); 8862 return ERROR_CODE_SUCCESS; 8863 } 8864 8865 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8866 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8867 if (status){ 8868 return status; 8869 } 8870 hci_run(); 8871 return ERROR_CODE_SUCCESS; 8872 } 8873 8874 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8875 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8876 // abort if already active 8877 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8878 return ERROR_CODE_COMMAND_DISALLOWED; 8879 } 8880 // store request 8881 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8882 hci_stack->le_periodic_sync_options = options; 8883 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8884 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8885 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8886 hci_stack->le_periodic_sync_skip = skip; 8887 hci_stack->le_periodic_sync_timeout = sync_timeout; 8888 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8889 8890 hci_run(); 8891 return ERROR_CODE_SUCCESS; 8892 } 8893 8894 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8895 // abort if not requested 8896 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8897 return ERROR_CODE_COMMAND_DISALLOWED; 8898 } 8899 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8900 hci_run(); 8901 return ERROR_CODE_SUCCESS; 8902 } 8903 8904 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8905 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8906 return ERROR_CODE_COMMAND_DISALLOWED; 8907 } 8908 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8909 hci_run(); 8910 return ERROR_CODE_SUCCESS; 8911 } 8912 8913 #endif 8914 #endif 8915 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8916 static uint8_t hci_iso_stream_create(hci_con_handle_t con_handle, uint8_t big_handle) { 8917 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8918 if (iso_stream == NULL){ 8919 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8920 } else { 8921 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8922 iso_stream->con_handle = con_handle; 8923 iso_stream->big_handle = big_handle; 8924 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8925 return ERROR_CODE_SUCCESS; 8926 } 8927 } 8928 8929 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 8930 btstack_linked_list_iterator_t it; 8931 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8932 while (btstack_linked_list_iterator_has_next(&it)){ 8933 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8934 if (iso_stream->con_handle == con_handle ) { 8935 return iso_stream; 8936 } 8937 } 8938 return NULL; 8939 } 8940 8941 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8942 log_info("hci_iso_stream_finalize con_handle 0x%04x, big_handle 0x%02x", iso_stream->con_handle, iso_stream->big_handle); 8943 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8944 btstack_memory_hci_iso_stream_free(iso_stream); 8945 } 8946 8947 static void hci_iso_stream_requested_finalize(uint8_t big_handle) { 8948 btstack_linked_list_iterator_t it; 8949 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8950 while (btstack_linked_list_iterator_has_next(&it)){ 8951 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8952 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 8953 (iso_stream->big_handle == big_handle)){ 8954 btstack_linked_list_iterator_remove(&it); 8955 btstack_memory_hci_iso_stream_free(iso_stream); 8956 } 8957 } 8958 } 8959 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 8960 btstack_linked_list_iterator_t it; 8961 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8962 while (btstack_linked_list_iterator_has_next(&it)){ 8963 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8964 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8965 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8966 } 8967 } 8968 } 8969 8970 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8971 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8972 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 8973 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 8974 return (sdu_len_offset + 2 + sdu_len) == size; 8975 } 8976 8977 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 8978 if (hci_stack->iso_packet_handler == NULL) { 8979 return; 8980 } 8981 if (size < 4) { 8982 return; 8983 } 8984 8985 // parse header 8986 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 8987 uint16_t iso_data_len = little_endian_read_16(packet, 2); 8988 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 8989 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 8990 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 8991 8992 // assert packet is complete 8993 if ((iso_data_len + 4u) != size){ 8994 return; 8995 } 8996 8997 if ((pb_flag & 0x01) == 0){ 8998 if (pb_flag == 0x02){ 8999 // The ISO_Data_Load field contains a header and a complete SDU. 9000 if (hci_iso_sdu_complete(packet, size)) { 9001 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9002 } 9003 } else { 9004 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9005 if (iso_stream == NULL){ 9006 return; 9007 } 9008 if (size > HCI_ISO_PAYLOAD_SIZE){ 9009 return; 9010 } 9011 memcpy(iso_stream->reassembly_buffer, packet, size); 9012 // fix pb_flag 9013 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9014 iso_stream->reassembly_pos = size; 9015 } 9016 } else { 9017 // iso_data_load contains continuation or last fragment of an SDU 9018 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9019 if (ts_flag != 0){ 9020 return; 9021 } 9022 // append fragment 9023 if (iso_stream == NULL){ 9024 return; 9025 } 9026 if (iso_stream->reassembly_pos == 0){ 9027 return; 9028 } 9029 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9030 // reset reassembly buffer 9031 iso_stream->reassembly_pos = 0; 9032 return; 9033 } 9034 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9035 iso_stream->reassembly_pos += iso_data_len; 9036 9037 // deliver if last fragment and SDU complete 9038 if (pb_flag == 0x03){ 9039 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9040 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9041 } 9042 iso_stream->reassembly_pos = 0; 9043 } 9044 } 9045 } 9046 9047 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9048 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9049 uint16_t pos = 0; 9050 event[pos++] = HCI_EVENT_META_GAP; 9051 event[pos++] = 4 + (2 * big->num_bis); 9052 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9053 event[pos++] = status; 9054 event[pos++] = big->big_handle; 9055 event[pos++] = big->num_bis; 9056 uint8_t i; 9057 for (i=0;i<big->num_bis;i++){ 9058 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9059 pos += 2; 9060 } 9061 hci_emit_event(event, pos, 0); 9062 } 9063 9064 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9065 uint8_t event [4]; 9066 uint16_t pos = 0; 9067 event[pos++] = HCI_EVENT_META_GAP; 9068 event[pos++] = 2; 9069 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9070 event[pos++] = big->big_handle; 9071 hci_emit_event(event, pos, 0); 9072 } 9073 9074 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9075 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9076 uint16_t pos = 0; 9077 event[pos++] = HCI_EVENT_META_GAP; 9078 event[pos++] = 4; 9079 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9080 event[pos++] = status; 9081 event[pos++] = big_sync->big_handle; 9082 event[pos++] = big_sync->num_bis; 9083 uint8_t i; 9084 for (i=0;i<big_sync->num_bis;i++){ 9085 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9086 pos += 2; 9087 } 9088 hci_emit_event(event, pos, 0); 9089 } 9090 9091 static void hci_emit_big_sync_stopped(const le_audio_big_sync_t * big_sync){ 9092 uint8_t event [4]; 9093 uint16_t pos = 0; 9094 event[pos++] = HCI_EVENT_META_GAP; 9095 event[pos++] = 2; 9096 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9097 event[pos++] = big_sync->big_handle; 9098 hci_emit_event(event, pos, 0); 9099 } 9100 9101 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9102 uint8_t event[6]; 9103 uint16_t pos = 0; 9104 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9105 event[pos++] = sizeof(event) - 2; 9106 event[pos++] = big->big_handle; 9107 event[pos++] = bis_index; 9108 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9109 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9110 } 9111 9112 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9113 btstack_linked_list_iterator_t it; 9114 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9115 while (btstack_linked_list_iterator_has_next(&it)){ 9116 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9117 if ( big->big_handle == big_handle ) { 9118 return big; 9119 } 9120 } 9121 return NULL; 9122 } 9123 9124 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9125 btstack_linked_list_iterator_t it; 9126 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9127 while (btstack_linked_list_iterator_has_next(&it)){ 9128 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9129 if ( big_sync->big_handle == big_handle ) { 9130 return big_sync; 9131 } 9132 } 9133 return NULL; 9134 } 9135 9136 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9137 hci_stack->iso_packets_to_queue = num_packets; 9138 } 9139 9140 static void hci_iso_notify_can_send_now(void){ 9141 btstack_linked_list_iterator_t it; 9142 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9143 while (btstack_linked_list_iterator_has_next(&it)){ 9144 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9145 // track number completed packet timestamps 9146 if (big->num_completed_timestamp_current_valid){ 9147 big->num_completed_timestamp_current_valid = false; 9148 if (big->num_completed_timestamp_previous_valid){ 9149 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9150 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9151 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9152 big->num_completed_timestamp_previous_ms); 9153 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9154 // to catch up, skip packet on all BIS 9155 uint8_t i; 9156 for (i=0;i<big->num_bis;i++){ 9157 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9158 if (iso_stream){ 9159 iso_stream->num_packets_to_skip++; 9160 } 9161 } 9162 } 9163 } 9164 big->num_completed_timestamp_previous_valid = true; 9165 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9166 } 9167 9168 if (big->can_send_now_requested){ 9169 // check if no outgoing iso packets pending and no can send now have to be emitted 9170 uint8_t i; 9171 bool can_send = true; 9172 uint8_t num_iso_queued_minimum = 0; 9173 for (i=0;i<big->num_bis;i++){ 9174 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9175 if (iso_stream == NULL) continue; 9176 // handle case where individual ISO packet was sent too late: 9177 // for each additionally queued packet, a new one needs to get skipped 9178 if (i==0){ 9179 num_iso_queued_minimum = iso_stream->num_packets_sent; 9180 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9181 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9182 iso_stream->num_packets_to_skip += num_packets_to_skip; 9183 iso_stream->num_packets_sent -= num_packets_to_skip; 9184 } 9185 // check if we can send now 9186 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9187 can_send = false; 9188 break; 9189 } 9190 } 9191 if (can_send){ 9192 // propagate can send now to individual streams 9193 big->can_send_now_requested = false; 9194 for (i=0;i<big->num_bis;i++){ 9195 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9196 iso_stream->emit_ready_to_send = true; 9197 } 9198 } 9199 } 9200 } 9201 9202 if (hci_stack->hci_packet_buffer_reserved) return; 9203 9204 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9205 while (btstack_linked_list_iterator_has_next(&it)){ 9206 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9207 // report bis ready 9208 uint8_t i; 9209 for (i=0;i<big->num_bis;i++){ 9210 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9211 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9212 iso_stream->emit_ready_to_send = false; 9213 hci_emit_bis_can_send_now(big, i); 9214 break; 9215 } 9216 } 9217 } 9218 } 9219 9220 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9221 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9222 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9223 } 9224 if (big_params->num_bis == 0){ 9225 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9226 } 9227 if (big_params->num_bis > MAX_NR_BIS){ 9228 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9229 } 9230 9231 // reserve ISO Streams 9232 uint8_t i; 9233 uint8_t status = ERROR_CODE_SUCCESS; 9234 for (i=0;i<big_params->num_bis;i++){ 9235 status = hci_iso_stream_create(HCI_CON_HANDLE_INVALID, big_params->big_handle); 9236 if (status != ERROR_CODE_SUCCESS) { 9237 break; 9238 } 9239 } 9240 9241 // free structs on error 9242 if (status != ERROR_CODE_SUCCESS){ 9243 hci_iso_stream_requested_finalize(big_params->big_handle); 9244 return status; 9245 } 9246 9247 le_audio_big_t * big = storage; 9248 big->big_handle = big_params->big_handle; 9249 big->params = big_params; 9250 big->state = LE_AUDIO_BIG_STATE_CREATE; 9251 big->num_bis = big_params->num_bis; 9252 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9253 9254 hci_run(); 9255 9256 return ERROR_CODE_SUCCESS; 9257 } 9258 9259 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9260 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9261 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9262 } 9263 if (big_sync_params->num_bis == 0){ 9264 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9265 } 9266 if (big_sync_params->num_bis > MAX_NR_BIS){ 9267 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9268 } 9269 9270 le_audio_big_sync_t * big_sync = storage; 9271 big_sync->big_handle = big_sync_params->big_handle; 9272 big_sync->params = big_sync_params; 9273 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9274 big_sync->num_bis = big_sync_params->num_bis; 9275 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9276 9277 hci_run(); 9278 9279 return ERROR_CODE_SUCCESS; 9280 } 9281 9282 uint8_t gap_big_terminate(uint8_t big_handle){ 9283 le_audio_big_t * big = hci_big_for_handle(big_handle); 9284 if (big == NULL){ 9285 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9286 } 9287 switch (big->state){ 9288 case LE_AUDIO_BIG_STATE_CREATE: 9289 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9290 hci_emit_big_terminated(big); 9291 break; 9292 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9293 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9294 break; 9295 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9296 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9297 case LE_AUDIO_BIG_STATE_ACTIVE: 9298 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9299 hci_run(); 9300 break; 9301 default: 9302 return ERROR_CODE_COMMAND_DISALLOWED; 9303 } 9304 return ERROR_CODE_SUCCESS; 9305 } 9306 9307 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9308 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9309 if (big_sync == NULL){ 9310 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9311 } 9312 switch (big_sync->state){ 9313 case LE_AUDIO_BIG_STATE_CREATE: 9314 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9315 hci_emit_big_sync_stopped(big_sync); 9316 break; 9317 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9318 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9319 break; 9320 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9321 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9322 case LE_AUDIO_BIG_STATE_ACTIVE: 9323 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9324 hci_run(); 9325 break; 9326 default: 9327 return ERROR_CODE_COMMAND_DISALLOWED; 9328 } 9329 return ERROR_CODE_SUCCESS; 9330 } 9331 9332 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9333 le_audio_big_t * big = hci_big_for_handle(big_handle); 9334 if (big == NULL){ 9335 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9336 } 9337 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9338 return ERROR_CODE_COMMAND_DISALLOWED; 9339 } 9340 big->can_send_now_requested = true; 9341 hci_iso_notify_can_send_now(); 9342 return ERROR_CODE_SUCCESS; 9343 } 9344 #endif 9345 #endif /* ENABLE_BLE */ 9346 9347 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9348 void hci_setup_test_connections_fuzz(void){ 9349 hci_connection_t * conn; 9350 9351 // default address: 66:55:44:33:00:01 9352 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9353 9354 // setup Controller info 9355 hci_stack->num_cmd_packets = 255; 9356 hci_stack->acl_packets_total_num = 255; 9357 9358 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9359 addr[5] = 0x01; 9360 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9361 conn->con_handle = addr[5]; 9362 conn->role = HCI_ROLE_SLAVE; 9363 conn->state = RECEIVED_CONNECTION_REQUEST; 9364 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9365 9366 // setup incoming Classic SCO connection with con handle 0x0002 9367 addr[5] = 0x02; 9368 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9369 conn->con_handle = addr[5]; 9370 conn->role = HCI_ROLE_SLAVE; 9371 conn->state = RECEIVED_CONNECTION_REQUEST; 9372 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9373 9374 // setup ready Classic ACL connection with con handle 0x0003 9375 addr[5] = 0x03; 9376 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9377 conn->con_handle = addr[5]; 9378 conn->role = HCI_ROLE_SLAVE; 9379 conn->state = OPEN; 9380 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9381 9382 // setup ready Classic SCO connection with con handle 0x0004 9383 addr[5] = 0x04; 9384 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9385 conn->con_handle = addr[5]; 9386 conn->role = HCI_ROLE_SLAVE; 9387 conn->state = OPEN; 9388 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9389 9390 // setup ready LE ACL connection with con handle 0x005 and public address 9391 addr[5] = 0x05; 9392 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9393 conn->con_handle = addr[5]; 9394 conn->role = HCI_ROLE_SLAVE; 9395 conn->state = OPEN; 9396 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9397 conn->sm_connection.sm_connection_encrypted = 1; 9398 } 9399 9400 void hci_free_connections_fuzz(void){ 9401 btstack_linked_list_iterator_t it; 9402 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9403 while (btstack_linked_list_iterator_has_next(&it)){ 9404 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9405 btstack_linked_list_iterator_remove(&it); 9406 btstack_memory_hci_connection_free(con); 9407 } 9408 } 9409 void hci_simulate_working_fuzz(void){ 9410 hci_stack->le_scanning_param_update = false; 9411 hci_init_done(); 9412 hci_stack->num_cmd_packets = 255; 9413 } 9414 #endif 9415