1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 156 static void hci_emit_transport_packet_sent(void); 157 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 158 static void hci_emit_nr_connections_changed(void); 159 static void hci_emit_hci_open_failed(void); 160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 161 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 162 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 163 static void hci_run(void); 164 static int hci_is_le_connection(hci_connection_t * connection); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 169 #endif 170 171 #ifdef ENABLE_BLE 172 #ifdef ENABLE_LE_CENTRAL 173 // called from test/ble_client/advertising_data_parser.c 174 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 176 static void hci_whitelist_free(void); 177 static hci_connection_t * gap_get_outgoing_connection(void); 178 static bool hci_run_general_gap_le(void); 179 #endif 180 #endif 181 182 // the STACK is here 183 #ifndef HAVE_MALLOC 184 static hci_stack_t hci_stack_static; 185 #endif 186 static hci_stack_t * hci_stack = NULL; 187 188 #ifdef ENABLE_CLASSIC 189 // default name 190 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 191 192 // test helper 193 static uint8_t disable_l2cap_timeouts = 0; 194 #endif 195 196 // reset connection state on create and on reconnect 197 // don't overwrite addr, con handle, role 198 static void hci_connection_init(hci_connection_t * conn){ 199 conn->authentication_flags = AUTH_FLAG_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 conn->request_role = HCI_ROLE_INVALID; 204 conn->sniff_subrating_max_latency = 0xffff; 205 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 206 conn->link_key_type = INVALID_LINK_KEY; 207 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 208 btstack_run_loop_set_timer_context(&conn->timeout, conn); 209 hci_connection_timestamp(conn); 210 #endif 211 conn->acl_recombination_length = 0; 212 conn->acl_recombination_pos = 0; 213 conn->num_packets_sent = 0; 214 215 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 216 #ifdef ENABLE_BLE 217 conn->le_phy_update_all_phys = 0xff; 218 #endif 219 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 220 conn->le_max_tx_octets = 27; 221 #endif 222 #ifdef ENABLE_CLASSIC_PAIRING_OOB 223 conn->classic_oob_c_192 = NULL; 224 conn->classic_oob_r_192 = NULL; 225 conn->classic_oob_c_256 = NULL; 226 conn->classic_oob_r_256 = NULL; 227 #endif 228 } 229 230 /** 231 * create connection for given address 232 * 233 * @return connection OR NULL, if no memory left 234 */ 235 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 236 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 237 238 hci_connection_t * conn = btstack_memory_hci_connection_get(); 239 if (!conn) return NULL; 240 hci_connection_init(conn); 241 242 bd_addr_copy(conn->address, addr); 243 conn->address_type = addr_type; 244 conn->con_handle = HCI_CON_HANDLE_INVALID; 245 conn->role = HCI_ROLE_INVALID; 246 247 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 248 249 return conn; 250 } 251 252 253 /** 254 * get le connection parameter range 255 * 256 * @return le connection parameter range struct 257 */ 258 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 259 *range = hci_stack->le_connection_parameter_range; 260 } 261 262 /** 263 * set le connection parameter range 264 * 265 */ 266 267 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 268 hci_stack->le_connection_parameter_range = *range; 269 } 270 271 /** 272 * @brief Test if connection parameters are inside in existing rage 273 * @param conn_interval_min (unit: 1.25ms) 274 * @param conn_interval_max (unit: 1.25ms) 275 * @param conn_latency 276 * @param supervision_timeout (unit: 10ms) 277 * @return 1 if included 278 */ 279 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){ 280 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 281 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 282 283 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 284 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 285 286 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 287 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 288 289 return 1; 290 } 291 292 /** 293 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 294 * @note: default: 1 295 * @param max_peripheral_connections 296 */ 297 #ifdef ENABLE_LE_PERIPHERAL 298 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 299 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 300 } 301 #endif 302 303 /** 304 * get hci connections iterator 305 * 306 * @return hci connections iterator 307 */ 308 309 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 310 btstack_linked_list_iterator_init(it, &hci_stack->connections); 311 } 312 313 /** 314 * get connection for a given handle 315 * 316 * @return connection OR NULL, if not found 317 */ 318 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 319 btstack_linked_list_iterator_t it; 320 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 321 while (btstack_linked_list_iterator_has_next(&it)){ 322 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 323 if ( item->con_handle == con_handle ) { 324 return item; 325 } 326 } 327 return NULL; 328 } 329 330 /** 331 * get connection for given address 332 * 333 * @return connection OR NULL, if not found 334 */ 335 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 336 btstack_linked_list_iterator_t it; 337 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 338 while (btstack_linked_list_iterator_has_next(&it)){ 339 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 340 if (connection->address_type != addr_type) continue; 341 if (memcmp(addr, connection->address, 6) != 0) continue; 342 return connection; 343 } 344 return NULL; 345 } 346 347 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 348 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 349 } 350 351 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 352 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 353 } 354 355 #ifdef ENABLE_CLASSIC 356 357 #ifdef ENABLE_SCO_OVER_HCI 358 static int hci_number_sco_connections(void){ 359 int connections = 0; 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 365 connections++; 366 } 367 return connections; 368 } 369 #endif 370 371 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 372 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 373 #ifdef HAVE_EMBEDDED_TICK 374 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 375 // connections might be timed out 376 hci_emit_l2cap_check_timeout(connection); 377 } 378 #else 379 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 380 // connections might be timed out 381 hci_emit_l2cap_check_timeout(connection); 382 } 383 #endif 384 } 385 386 static void hci_connection_timestamp(hci_connection_t *connection){ 387 #ifdef HAVE_EMBEDDED_TICK 388 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 389 #else 390 connection->timestamp = btstack_run_loop_get_time_ms(); 391 #endif 392 } 393 394 /** 395 * add authentication flags and reset timer 396 * @note: assumes classic connection 397 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 398 */ 399 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 400 bd_addr_t addr; 401 reverse_bd_addr(bd_addr, addr); 402 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 403 if (conn) { 404 connectionSetAuthenticationFlags(conn, flags); 405 hci_connection_timestamp(conn); 406 } 407 } 408 409 static bool hci_pairing_active(hci_connection_t * hci_connection){ 410 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 411 } 412 413 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 414 if (hci_pairing_active(hci_connection)) return; 415 if (ssp){ 416 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 417 } else { 418 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 419 } 420 // if we are initiator, we have sent an HCI Authenticate Request 421 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 422 423 // if we are responder, use minimal service security level as required level 424 if (!initiator){ 425 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); 426 } 427 428 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 429 430 uint8_t event[12]; 431 event[0] = GAP_EVENT_PAIRING_STARTED; 432 event[1] = 10; 433 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 434 reverse_bd_addr(hci_connection->address, &event[4]); 435 event[10] = (uint8_t) ssp; 436 event[11] = (uint8_t) initiator; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 441 hci_connection->requested_security_level = LEVEL_0; 442 if (!hci_pairing_active(hci_connection)) return; 443 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 444 #ifdef ENABLE_CLASSIC_PAIRING_OOB 445 hci_connection->classic_oob_c_192 = NULL; 446 hci_connection->classic_oob_r_192 = NULL; 447 hci_connection->classic_oob_c_256 = NULL; 448 hci_connection->classic_oob_r_256 = NULL; 449 #endif 450 log_info("pairing complete, status %02x", status); 451 452 uint8_t event[11]; 453 event[0] = GAP_EVENT_PAIRING_COMPLETE; 454 event[1] = 9; 455 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 456 reverse_bd_addr(hci_connection->address, &event[4]); 457 event[10] = status; 458 hci_emit_event(event, sizeof(event), 1); 459 } 460 461 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 462 hci_connection_t * conn = hci_connection_for_handle(handle); 463 if (!conn) return false; 464 return hci_pairing_active(conn); 465 } 466 467 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 468 if (!hci_stack->link_key_db) return; 469 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 470 hci_stack->link_key_db->delete_link_key(addr); 471 } 472 473 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 474 if (!hci_stack->link_key_db) return; 475 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 476 hci_stack->link_key_db->put_link_key(addr, link_key, type); 477 } 478 479 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 480 if (!hci_stack->link_key_db) return false; 481 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 482 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 483 return result; 484 } 485 486 void gap_delete_all_link_keys(void){ 487 bd_addr_t addr; 488 link_key_t link_key; 489 link_key_type_t type; 490 btstack_link_key_iterator_t it; 491 int ok = gap_link_key_iterator_init(&it); 492 if (!ok) { 493 log_error("could not initialize iterator"); 494 return; 495 } 496 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 497 gap_drop_link_key_for_bd_addr(addr); 498 } 499 gap_link_key_iterator_done(&it); 500 } 501 502 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 503 if (!hci_stack->link_key_db) return 0; 504 if (!hci_stack->link_key_db->iterator_init) return 0; 505 return hci_stack->link_key_db->iterator_init(it); 506 } 507 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){ 508 if (!hci_stack->link_key_db) return 0; 509 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 510 } 511 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 512 if (!hci_stack->link_key_db) return; 513 hci_stack->link_key_db->iterator_done(it); 514 } 515 #endif 516 517 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 518 switch (address_type){ 519 case BD_ADDR_TYPE_LE_PUBLIC: 520 case BD_ADDR_TYPE_LE_RANDOM: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 522 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 523 return true; 524 default: 525 return false; 526 } 527 } 528 529 static int hci_is_le_connection(hci_connection_t * connection){ 530 return hci_is_le_connection_type(connection->address_type); 531 } 532 533 /** 534 * count connections 535 */ 536 static int nr_hci_connections(void){ 537 int count = 0; 538 btstack_linked_item_t *it; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 540 count++; 541 } 542 return count; 543 } 544 545 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 546 547 unsigned int num_packets_sent_classic = 0; 548 unsigned int num_packets_sent_le = 0; 549 550 btstack_linked_item_t *it; 551 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 552 hci_connection_t * connection = (hci_connection_t *) it; 553 if (hci_is_le_connection(connection)){ 554 num_packets_sent_le += connection->num_packets_sent; 555 } 556 if (connection->address_type == BD_ADDR_TYPE_ACL){ 557 num_packets_sent_classic += connection->num_packets_sent; 558 } 559 } 560 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 561 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 562 int free_slots_le = 0; 563 564 if (free_slots_classic < 0){ 565 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); 566 return 0; 567 } 568 569 if (hci_stack->le_acl_packets_total_num){ 570 // if we have LE slots, they are used 571 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 572 if (free_slots_le < 0){ 573 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); 574 return 0; 575 } 576 } else { 577 // otherwise, classic slots are used for LE, too 578 free_slots_classic -= num_packets_sent_le; 579 if (free_slots_classic < 0){ 580 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); 581 return 0; 582 } 583 } 584 585 switch (address_type){ 586 case BD_ADDR_TYPE_UNKNOWN: 587 log_error("hci_number_free_acl_slots: unknown address type"); 588 return 0; 589 590 case BD_ADDR_TYPE_ACL: 591 return (uint16_t) free_slots_classic; 592 593 default: 594 if (hci_stack->le_acl_packets_total_num > 0){ 595 return (uint16_t) free_slots_le; 596 } 597 return (uint16_t) free_slots_classic; 598 } 599 } 600 601 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 602 // get connection type 603 hci_connection_t * connection = hci_connection_for_handle(con_handle); 604 if (!connection){ 605 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 606 return 0; 607 } 608 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 609 } 610 611 #ifdef ENABLE_CLASSIC 612 static int hci_number_free_sco_slots(void){ 613 unsigned int num_sco_packets_sent = 0; 614 btstack_linked_item_t *it; 615 if (hci_stack->synchronous_flow_control_enabled){ 616 // explicit flow control 617 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 618 hci_connection_t * connection = (hci_connection_t *) it; 619 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 620 num_sco_packets_sent += connection->num_packets_sent; 621 } 622 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 623 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 624 return 0; 625 } 626 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 627 } else { 628 // implicit flow control -- TODO 629 int num_ready = 0; 630 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 631 hci_connection_t * connection = (hci_connection_t *) it; 632 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 633 if (connection->sco_tx_ready == 0) continue; 634 num_ready++; 635 } 636 return num_ready; 637 } 638 } 639 #endif 640 641 // only used to send HCI Host Number Completed Packets 642 static int hci_can_send_comand_packet_transport(void){ 643 if (hci_stack->hci_packet_buffer_reserved) return 0; 644 645 // check for async hci transport implementations 646 if (hci_stack->hci_transport->can_send_packet_now){ 647 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 648 return 0; 649 } 650 } 651 return 1; 652 } 653 654 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 655 bool hci_can_send_command_packet_now(void){ 656 if (hci_can_send_comand_packet_transport() == 0) return false; 657 return hci_stack->num_cmd_packets > 0u; 658 } 659 660 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 661 // check for async hci transport implementations 662 if (!hci_stack->hci_transport->can_send_packet_now) return true; 663 return hci_stack->hci_transport->can_send_packet_now(packet_type); 664 } 665 666 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 667 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 668 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 669 } 670 671 bool hci_can_send_acl_le_packet_now(void){ 672 if (hci_stack->hci_packet_buffer_reserved) return false; 673 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 674 } 675 676 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 677 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 678 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 679 } 680 681 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 682 if (hci_stack->hci_packet_buffer_reserved) return false; 683 return hci_can_send_prepared_acl_packet_now(con_handle); 684 } 685 686 #ifdef ENABLE_CLASSIC 687 bool hci_can_send_acl_classic_packet_now(void){ 688 if (hci_stack->hci_packet_buffer_reserved) return false; 689 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 690 } 691 692 bool hci_can_send_prepared_sco_packet_now(void){ 693 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 694 if (hci_have_usb_transport()){ 695 return hci_stack->sco_can_send_now; 696 } else { 697 return hci_number_free_sco_slots() > 0; 698 } 699 } 700 701 bool hci_can_send_sco_packet_now(void){ 702 if (hci_stack->hci_packet_buffer_reserved) return false; 703 return hci_can_send_prepared_sco_packet_now(); 704 } 705 706 void hci_request_sco_can_send_now_event(void){ 707 hci_stack->sco_waiting_for_can_send_now = 1; 708 hci_notify_if_sco_can_send_now(); 709 } 710 #endif 711 712 // used for internal checks in l2cap.c 713 bool hci_is_packet_buffer_reserved(void){ 714 return hci_stack->hci_packet_buffer_reserved; 715 } 716 717 // reserves outgoing packet buffer. 718 // @return 1 if successful 719 bool hci_reserve_packet_buffer(void){ 720 if (hci_stack->hci_packet_buffer_reserved) { 721 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 722 return false; 723 } 724 hci_stack->hci_packet_buffer_reserved = true; 725 return true; 726 } 727 728 void hci_release_packet_buffer(void){ 729 hci_stack->hci_packet_buffer_reserved = false; 730 } 731 732 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 733 static int hci_transport_synchronous(void){ 734 return hci_stack->hci_transport->can_send_packet_now == NULL; 735 } 736 737 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 738 739 // 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); 740 741 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 742 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 743 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 744 max_acl_data_packet_length = hci_stack->le_data_packets_length; 745 } 746 747 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 748 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 749 max_acl_data_packet_length = connection->le_max_tx_octets; 750 } 751 #endif 752 753 log_debug("hci_send_acl_packet_fragments entered"); 754 755 uint8_t status = ERROR_CODE_SUCCESS; 756 // multiple packets could be send on a synchronous HCI transport 757 while (true){ 758 759 log_debug("hci_send_acl_packet_fragments loop entered"); 760 761 // get current data 762 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 763 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 764 bool more_fragments = false; 765 766 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 767 if (current_acl_data_packet_length > max_acl_data_packet_length){ 768 more_fragments = true; 769 current_acl_data_packet_length = max_acl_data_packet_length; 770 } 771 772 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 773 if (acl_header_pos > 0u){ 774 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 775 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 777 } 778 779 // update header len 780 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 781 782 // count packet 783 connection->num_packets_sent++; 784 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 785 786 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 787 if (more_fragments){ 788 // update start of next fragment to send 789 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 790 } else { 791 // done 792 hci_stack->acl_fragmentation_pos = 0; 793 hci_stack->acl_fragmentation_total_size = 0; 794 } 795 796 // send packet 797 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 798 const int size = current_acl_data_packet_length + 4; 799 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 800 hci_stack->acl_fragmentation_tx_active = 1; 801 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 802 if (err != 0){ 803 // no error from HCI Transport expected 804 status = ERROR_CODE_HARDWARE_FAILURE; 805 } 806 807 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 808 809 // done yet? 810 if (!more_fragments) break; 811 812 // can send more? 813 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 814 } 815 816 log_debug("hci_send_acl_packet_fragments loop over"); 817 818 // release buffer now for synchronous transport 819 if (hci_transport_synchronous()){ 820 hci_stack->acl_fragmentation_tx_active = 0; 821 hci_release_packet_buffer(); 822 hci_emit_transport_packet_sent(); 823 } 824 825 return status; 826 } 827 828 // pre: caller has reserved the packet buffer 829 uint8_t hci_send_acl_packet_buffer(int size){ 830 btstack_assert(hci_stack->hci_packet_buffer_reserved); 831 832 uint8_t * packet = hci_stack->hci_packet_buffer; 833 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 834 835 // check for free places on Bluetooth module 836 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 837 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 return BTSTACK_ACL_BUFFERS_FULL; 841 } 842 843 hci_connection_t *connection = hci_connection_for_handle( con_handle); 844 if (!connection) { 845 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 846 hci_release_packet_buffer(); 847 hci_emit_transport_packet_sent(); 848 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 849 } 850 851 #ifdef ENABLE_CLASSIC 852 hci_connection_timestamp(connection); 853 #endif 854 855 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 856 857 // setup data 858 hci_stack->acl_fragmentation_total_size = size; 859 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 860 861 return hci_send_acl_packet_fragments(connection); 862 } 863 864 #ifdef ENABLE_CLASSIC 865 // pre: caller has reserved the packet buffer 866 uint8_t hci_send_sco_packet_buffer(int size){ 867 btstack_assert(hci_stack->hci_packet_buffer_reserved); 868 869 uint8_t * packet = hci_stack->hci_packet_buffer; 870 871 // skip checks in loopback mode 872 if (!hci_stack->loopback_mode){ 873 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 874 875 // check for free places on Bluetooth module 876 if (!hci_can_send_prepared_sco_packet_now()) { 877 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 878 hci_release_packet_buffer(); 879 hci_emit_transport_packet_sent(); 880 return BTSTACK_ACL_BUFFERS_FULL; 881 } 882 883 // track send packet in connection struct 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 if (hci_have_usb_transport()){ 893 // token used 894 hci_stack->sco_can_send_now = false; 895 } else { 896 if (hci_stack->synchronous_flow_control_enabled){ 897 connection->num_packets_sent++; 898 } else { 899 connection->sco_tx_ready--; 900 } 901 } 902 } 903 904 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 905 906 #ifdef HAVE_SCO_TRANSPORT 907 hci_stack->sco_transport->send_packet(packet, size); 908 hci_release_packet_buffer(); 909 hci_emit_transport_packet_sent(); 910 911 return 0; 912 #else 913 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 914 if (hci_transport_synchronous()){ 915 hci_release_packet_buffer(); 916 hci_emit_transport_packet_sent(); 917 } 918 919 if (err != 0){ 920 return ERROR_CODE_HARDWARE_FAILURE; 921 } 922 return ERROR_CODE_SUCCESS; 923 #endif 924 } 925 #endif 926 927 static void acl_handler(uint8_t *packet, uint16_t size){ 928 929 // get info 930 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 931 hci_connection_t *conn = hci_connection_for_handle(con_handle); 932 uint8_t acl_flags = READ_ACL_FLAGS(packet); 933 uint16_t acl_length = READ_ACL_LENGTH(packet); 934 935 // ignore non-registered handle 936 if (!conn){ 937 log_error("acl_handler called with non-registered handle %u!" , con_handle); 938 return; 939 } 940 941 // assert packet is complete 942 if ((acl_length + 4u) != size){ 943 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 944 return; 945 } 946 947 #ifdef ENABLE_CLASSIC 948 // update idle timestamp 949 hci_connection_timestamp(conn); 950 #endif 951 952 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 953 hci_stack->host_completed_packets = 1; 954 conn->num_packets_completed++; 955 #endif 956 957 // handle different packet types 958 switch (acl_flags & 0x03u) { 959 960 case 0x01: // continuation fragment 961 962 // sanity checks 963 if (conn->acl_recombination_pos == 0u) { 964 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 965 return; 966 } 967 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 968 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 969 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 970 conn->acl_recombination_pos = 0; 971 return; 972 } 973 974 // append fragment payload (header already stored) 975 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 976 &packet[4], acl_length); 977 conn->acl_recombination_pos += acl_length; 978 979 // forward complete L2CAP packet if complete. 980 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 981 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 982 // reset recombination buffer 983 conn->acl_recombination_length = 0; 984 conn->acl_recombination_pos = 0; 985 } 986 break; 987 988 case 0x02: { // first fragment 989 990 // sanity check 991 if (conn->acl_recombination_pos) { 992 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 993 conn->acl_recombination_pos = 0; 994 } 995 996 // peek into L2CAP packet! 997 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 998 999 // compare fragment size to L2CAP packet size 1000 if (acl_length >= (l2cap_length + 4u)){ 1001 // forward fragment as L2CAP packet 1002 hci_emit_acl_packet(packet, acl_length + 4u); 1003 } else { 1004 1005 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1006 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1007 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1008 return; 1009 } 1010 1011 // store first fragment and tweak acl length for complete package 1012 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1013 packet, acl_length + 4u); 1014 conn->acl_recombination_pos = acl_length + 4u; 1015 conn->acl_recombination_length = l2cap_length; 1016 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1017 } 1018 break; 1019 1020 } 1021 default: 1022 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1023 return; 1024 } 1025 1026 // execute main loop 1027 hci_run(); 1028 } 1029 1030 static void hci_connection_stop_timer(hci_connection_t * conn){ 1031 btstack_run_loop_remove_timer(&conn->timeout); 1032 #ifdef ENABLE_CLASSIC 1033 btstack_run_loop_remove_timer(&conn->timeout_sco); 1034 #endif 1035 } 1036 1037 static void hci_shutdown_connection(hci_connection_t *conn){ 1038 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1039 1040 #ifdef ENABLE_CLASSIC 1041 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1042 bd_addr_type_t addr_type = conn->address_type; 1043 #endif 1044 #ifdef HAVE_SCO_TRANSPORT 1045 hci_con_handle_t con_handle = conn->con_handle; 1046 #endif 1047 #endif 1048 1049 hci_connection_stop_timer(conn); 1050 1051 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1052 btstack_memory_hci_connection_free( conn ); 1053 1054 // now it's gone 1055 hci_emit_nr_connections_changed(); 1056 1057 #ifdef ENABLE_CLASSIC 1058 #ifdef ENABLE_SCO_OVER_HCI 1059 // update SCO 1060 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1061 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1062 } 1063 #endif 1064 #ifdef HAVE_SCO_TRANSPORT 1065 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1066 hci_stack->sco_transport->close(con_handle); 1067 } 1068 #endif 1069 #endif 1070 } 1071 1072 #ifdef ENABLE_CLASSIC 1073 1074 static const uint16_t packet_type_sizes[] = { 1075 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1076 HCI_ACL_DH1_SIZE, 0, 0, 0, 1077 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1078 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1079 }; 1080 static const uint8_t packet_type_feature_requirement_bit[] = { 1081 0, // 3 slot packets 1082 1, // 5 slot packets 1083 25, // EDR 2 mpbs 1084 26, // EDR 3 mbps 1085 39, // 3 slot EDR packts 1086 40, // 5 slot EDR packet 1087 }; 1088 static const uint16_t packet_type_feature_packet_mask[] = { 1089 0x0f00, // 3 slot packets 1090 0xf000, // 5 slot packets 1091 0x1102, // EDR 2 mpbs 1092 0x2204, // EDR 3 mbps 1093 0x0300, // 3 slot EDR packts 1094 0x3000, // 5 slot EDR packet 1095 }; 1096 1097 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1098 // enable packet types based on size 1099 uint16_t packet_types = 0; 1100 unsigned int i; 1101 for (i=0;i<16;i++){ 1102 if (packet_type_sizes[i] == 0) continue; 1103 if (packet_type_sizes[i] <= buffer_size){ 1104 packet_types |= 1 << i; 1105 } 1106 } 1107 // disable packet types due to missing local supported features 1108 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1109 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1110 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1111 if (feature_set) continue; 1112 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1113 packet_types &= ~packet_type_feature_packet_mask[i]; 1114 } 1115 // flip bits for "may not be used" 1116 packet_types ^= 0x3306; 1117 return packet_types; 1118 } 1119 1120 uint16_t hci_usable_acl_packet_types(void){ 1121 return hci_stack->packet_types; 1122 } 1123 #endif 1124 1125 uint8_t* hci_get_outgoing_packet_buffer(void){ 1126 // hci packet buffer is >= acl data packet length 1127 return hci_stack->hci_packet_buffer; 1128 } 1129 1130 uint16_t hci_max_acl_data_packet_length(void){ 1131 return hci_stack->acl_data_packet_length; 1132 } 1133 1134 #ifdef ENABLE_CLASSIC 1135 bool hci_extended_sco_link_supported(void){ 1136 // No. 31, byte 3, bit 7 1137 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1138 } 1139 #endif 1140 1141 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1142 // No. 54, byte 6, bit 6 1143 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1144 } 1145 1146 #ifdef ENABLE_CLASSIC 1147 static int gap_ssp_supported(void){ 1148 // No. 51, byte 6, bit 3 1149 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1150 } 1151 #endif 1152 1153 static int hci_classic_supported(void){ 1154 #ifdef ENABLE_CLASSIC 1155 // No. 37, byte 4, bit 5, = No BR/EDR Support 1156 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1157 #else 1158 return 0; 1159 #endif 1160 } 1161 1162 static int hci_le_supported(void){ 1163 #ifdef ENABLE_BLE 1164 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1165 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1166 #else 1167 return 0; 1168 #endif 1169 } 1170 1171 #ifdef ENABLE_BLE 1172 1173 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1174 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1175 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1176 } else { 1177 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1178 } 1179 } 1180 1181 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1184 } 1185 1186 #ifdef ENABLE_LE_PERIPHERAL 1187 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1188 *addr_type = hci_stack->le_advertisements_own_addr_type; 1189 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1190 }; 1191 #endif 1192 1193 #ifdef ENABLE_LE_CENTRAL 1194 1195 /** 1196 * @brief Get own addr type and address used for LE connections (Central) 1197 */ 1198 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1199 *addr_type = hci_stack->le_connection_own_addr_type; 1200 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1201 } 1202 1203 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1204 1205 int offset = 3; 1206 int num_reports = packet[offset]; 1207 offset += 1; 1208 1209 int i; 1210 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1211 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1212 for (i=0; (i<num_reports) && (offset < size);i++){ 1213 // sanity checks on data_length: 1214 uint8_t data_length = packet[offset + 8]; 1215 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1216 if ((offset + 9u + data_length + 1u) > size) return; 1217 // setup event 1218 uint8_t event_size = 10u + data_length; 1219 int pos = 0; 1220 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1221 event[pos++] = event_size; 1222 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1223 offset += 8; 1224 pos += 8; 1225 event[pos++] = packet[offset + 1 + data_length]; // rssi 1226 event[pos++] = data_length; 1227 offset++; 1228 (void)memcpy(&event[pos], &packet[offset], data_length); 1229 pos += data_length; 1230 offset += data_length + 1u; // rssi 1231 hci_emit_event(event, pos, 1); 1232 } 1233 } 1234 #endif 1235 #endif 1236 1237 #ifdef ENABLE_BLE 1238 #ifdef ENABLE_LE_PERIPHERAL 1239 static void hci_update_advertisements_enabled_for_current_roles(void){ 1240 if (hci_stack->le_advertisements_enabled){ 1241 // get number of active le slave connections 1242 int num_slave_connections = 0; 1243 btstack_linked_list_iterator_t it; 1244 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1245 while (btstack_linked_list_iterator_has_next(&it)){ 1246 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1247 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1248 if (con->state != OPEN) continue; 1249 if (con->role != HCI_ROLE_SLAVE) continue; 1250 if (!hci_is_le_connection(con)) continue; 1251 num_slave_connections++; 1252 } 1253 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1254 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1255 } else { 1256 hci_stack->le_advertisements_enabled_for_current_roles = false; 1257 } 1258 } 1259 #endif 1260 #endif 1261 1262 #ifdef ENABLE_CLASSIC 1263 static void gap_run_set_local_name(void){ 1264 hci_reserve_packet_buffer(); 1265 uint8_t * packet = hci_stack->hci_packet_buffer; 1266 // construct HCI Command and send 1267 uint16_t opcode = hci_write_local_name.opcode; 1268 hci_stack->last_cmd_opcode = opcode; 1269 packet[0] = opcode & 0xff; 1270 packet[1] = opcode >> 8; 1271 packet[2] = DEVICE_NAME_LEN; 1272 memset(&packet[3], 0, DEVICE_NAME_LEN); 1273 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1274 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1275 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1276 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1277 // expand '00:00:00:00:00:00' in name with bd_addr 1278 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1279 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1280 } 1281 1282 static void gap_run_set_eir_data(void){ 1283 hci_reserve_packet_buffer(); 1284 uint8_t * packet = hci_stack->hci_packet_buffer; 1285 // construct HCI Command in-place and send 1286 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1287 hci_stack->last_cmd_opcode = opcode; 1288 uint16_t offset = 0; 1289 packet[offset++] = opcode & 0xff; 1290 packet[offset++] = opcode >> 8; 1291 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1292 packet[offset++] = 0; // FEC not required 1293 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1294 if (hci_stack->eir_data){ 1295 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1296 ad_context_t context; 1297 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1298 uint8_t data_type = ad_iterator_get_data_type(&context); 1299 uint8_t size = ad_iterator_get_data_len(&context); 1300 const uint8_t *data = ad_iterator_get_data(&context); 1301 // copy item 1302 packet[offset++] = size + 1; 1303 packet[offset++] = data_type; 1304 memcpy(&packet[offset], data, size); 1305 // update name item 1306 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1307 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1308 } 1309 offset += size; 1310 } 1311 } else { 1312 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1313 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1314 packet[offset++] = bytes_to_copy + 1; 1315 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1316 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1317 // expand '00:00:00:00:00:00' in name with bd_addr 1318 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1319 } 1320 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1321 } 1322 1323 static void hci_run_gap_tasks_classic(void){ 1324 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1325 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1326 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1327 return; 1328 } 1329 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1330 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1331 gap_run_set_local_name(); 1332 return; 1333 } 1334 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1335 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1336 gap_run_set_eir_data(); 1337 return; 1338 } 1339 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1340 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1341 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1342 return; 1343 } 1344 // write page scan activity 1345 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1346 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1347 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1348 return; 1349 } 1350 // write page scan type 1351 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1352 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1353 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1354 return; 1355 } 1356 // write page timeout 1357 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1358 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1359 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1360 return; 1361 } 1362 // send scan enable 1363 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1364 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1365 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1366 return; 1367 } 1368 // send write scan activity 1369 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1370 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1371 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1372 return; 1373 } 1374 } 1375 #endif 1376 1377 #ifndef HAVE_HOST_CONTROLLER_API 1378 1379 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1380 if (!hci_stack->config) return 0; 1381 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1382 // Limit baud rate for Broadcom chipsets to 3 mbps 1383 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1384 baud_rate = 3000000; 1385 } 1386 return baud_rate; 1387 } 1388 1389 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1390 UNUSED(ds); 1391 1392 switch (hci_stack->substate){ 1393 case HCI_INIT_W4_SEND_RESET: 1394 log_info("Resend HCI Reset"); 1395 hci_stack->substate = HCI_INIT_SEND_RESET; 1396 hci_stack->num_cmd_packets = 1; 1397 hci_run(); 1398 break; 1399 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1400 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1401 if (hci_stack->hci_transport->reset_link){ 1402 hci_stack->hci_transport->reset_link(); 1403 } 1404 1405 /* fall through */ 1406 1407 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1408 log_info("Resend HCI Reset - CSR Warm Boot"); 1409 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1410 hci_stack->num_cmd_packets = 1; 1411 hci_run(); 1412 break; 1413 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1414 if (hci_stack->hci_transport->set_baudrate){ 1415 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1416 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1417 hci_stack->hci_transport->set_baudrate(baud_rate); 1418 } 1419 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1420 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1421 if (hci_stack->hci_transport->reset_link){ 1422 log_info("Link Reset"); 1423 hci_stack->hci_transport->reset_link(); 1424 } 1425 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1426 hci_run(); 1427 } 1428 break; 1429 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1430 // otherwise continue 1431 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1432 hci_send_cmd(&hci_read_local_supported_commands); 1433 break; 1434 default: 1435 break; 1436 } 1437 } 1438 #endif 1439 1440 static void hci_initializing_next_state(void){ 1441 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1442 } 1443 1444 static void hci_init_done(void){ 1445 // done. tell the app 1446 log_info("hci_init_done -> HCI_STATE_WORKING"); 1447 hci_stack->state = HCI_STATE_WORKING; 1448 hci_emit_state(); 1449 } 1450 1451 // assumption: hci_can_send_command_packet_now() == true 1452 static void hci_initializing_run(void){ 1453 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1454 1455 if (!hci_can_send_command_packet_now()) return; 1456 1457 #ifndef HAVE_HOST_CONTROLLER_API 1458 bool need_baud_change = hci_stack->config 1459 && hci_stack->chipset 1460 && hci_stack->chipset->set_baudrate_command 1461 && hci_stack->hci_transport->set_baudrate 1462 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1463 #endif 1464 1465 switch (hci_stack->substate){ 1466 case HCI_INIT_SEND_RESET: 1467 hci_state_reset(); 1468 1469 #ifndef HAVE_HOST_CONTROLLER_API 1470 // prepare reset if command complete not received in 100ms 1471 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1472 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1473 btstack_run_loop_add_timer(&hci_stack->timeout); 1474 #endif 1475 // send command 1476 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1480 hci_send_cmd(&hci_read_local_version_information); 1481 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1482 break; 1483 1484 #ifndef HAVE_HOST_CONTROLLER_API 1485 case HCI_INIT_SEND_READ_LOCAL_NAME: 1486 hci_send_cmd(&hci_read_local_name); 1487 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1488 break; 1489 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1490 hci_state_reset(); 1491 // prepare reset if command complete not received in 100ms 1492 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1493 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1494 btstack_run_loop_add_timer(&hci_stack->timeout); 1495 // send command 1496 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1497 hci_send_cmd(&hci_reset); 1498 break; 1499 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1500 hci_state_reset(); 1501 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1502 hci_send_cmd(&hci_reset); 1503 break; 1504 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1505 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1506 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1507 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1508 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1509 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1510 break; 1511 } 1512 case HCI_INIT_SET_BD_ADDR: 1513 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1514 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1515 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1516 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1517 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1518 break; 1519 case HCI_INIT_SEND_BAUD_CHANGE: 1520 if (need_baud_change) { 1521 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1522 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1523 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1524 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1525 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1526 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1527 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1528 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1529 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1530 btstack_run_loop_add_timer(&hci_stack->timeout); 1531 } 1532 break; 1533 } 1534 1535 /* fall through */ 1536 1537 case HCI_INIT_CUSTOM_INIT: 1538 // Custom initialization 1539 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1540 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1541 bool send_cmd = false; 1542 switch (hci_stack->chipset_result){ 1543 case BTSTACK_CHIPSET_VALID_COMMAND: 1544 send_cmd = true; 1545 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1546 break; 1547 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1548 send_cmd = true; 1549 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1550 log_info("CSR Warm Boot"); 1551 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1552 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1553 btstack_run_loop_add_timer(&hci_stack->timeout); 1554 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1555 && hci_stack->config 1556 && hci_stack->chipset 1557 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1558 && hci_stack->hci_transport->set_baudrate 1559 && hci_transport_uart_get_main_baud_rate()){ 1560 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1561 } else { 1562 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1563 } 1564 break; 1565 default: 1566 break; 1567 } 1568 1569 if (send_cmd){ 1570 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1571 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1572 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1573 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1574 break; 1575 } 1576 log_info("Init script done"); 1577 1578 // Init script download on Broadcom chipsets causes: 1579 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1580 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1581 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1582 1583 // - baud rate to reset, restore UART baud rate if needed 1584 if (need_baud_change) { 1585 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1586 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1587 hci_stack->hci_transport->set_baudrate(baud_rate); 1588 } 1589 1590 uint16_t bcm_delay_ms = 300; 1591 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1592 // -> Work around: wait here. 1593 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1594 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1595 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1596 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1597 btstack_run_loop_add_timer(&hci_stack->timeout); 1598 break; 1599 } 1600 } 1601 #endif 1602 /* fall through */ 1603 1604 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1605 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1606 hci_send_cmd(&hci_read_local_supported_commands); 1607 break; 1608 case HCI_INIT_READ_BD_ADDR: 1609 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1610 hci_send_cmd(&hci_read_bd_addr); 1611 break; 1612 case HCI_INIT_READ_BUFFER_SIZE: 1613 // only read buffer size if supported 1614 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1615 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1616 hci_send_cmd(&hci_read_buffer_size); 1617 break; 1618 } 1619 1620 /* fall through */ 1621 1622 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1623 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1624 hci_send_cmd(&hci_read_local_supported_features); 1625 break; 1626 1627 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1628 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1629 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1630 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1631 break; 1632 case HCI_INIT_HOST_BUFFER_SIZE: 1633 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1634 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1635 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1636 break; 1637 #endif 1638 1639 case HCI_INIT_SET_EVENT_MASK: 1640 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1641 if (hci_le_supported()){ 1642 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1643 } else { 1644 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1645 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1646 } 1647 break; 1648 1649 #ifdef ENABLE_CLASSIC 1650 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1651 if (hci_classic_supported() && gap_ssp_supported()){ 1652 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1653 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1654 break; 1655 } 1656 1657 /* fall through */ 1658 1659 case HCI_INIT_WRITE_INQUIRY_MODE: 1660 if (hci_classic_supported()){ 1661 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1662 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1663 break; 1664 } 1665 1666 /* fall through */ 1667 1668 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1669 // skip write secure connections host support if not supported or disabled 1670 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1671 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1672 hci_stack->secure_connections_active = true; 1673 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1674 break; 1675 } 1676 1677 #ifdef ENABLE_SCO_OVER_HCI 1678 /* fall through */ 1679 1680 // only sent if ENABLE_SCO_OVER_HCI is defined 1681 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1682 // skip write synchronous flow control if not supported 1683 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1684 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1685 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1686 break; 1687 } 1688 /* fall through */ 1689 1690 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1691 // skip write default erroneous data reporting if not supported 1692 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1693 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1694 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1695 break; 1696 } 1697 #endif 1698 1699 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1700 /* fall through */ 1701 1702 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1703 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1704 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1705 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1706 #ifdef ENABLE_SCO_OVER_HCI 1707 log_info("BCM: Route SCO data via HCI transport"); 1708 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1709 #endif 1710 #ifdef ENABLE_SCO_OVER_PCM 1711 log_info("BCM: Route SCO data via PCM interface"); 1712 #ifdef ENABLE_BCM_PCM_WBS 1713 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1714 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1715 #else 1716 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1717 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1718 #endif 1719 #endif 1720 break; 1721 } 1722 #endif 1723 1724 #ifdef ENABLE_SCO_OVER_PCM 1725 /* fall through */ 1726 1727 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1728 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1729 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1730 log_info("BCM: Config PCM interface for I2S"); 1731 #ifdef ENABLE_BCM_PCM_WBS 1732 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1733 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1734 #else 1735 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1736 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1737 #endif 1738 break; 1739 } 1740 #endif 1741 #endif 1742 1743 #ifdef ENABLE_BLE 1744 /* fall through */ 1745 1746 // LE INIT 1747 case HCI_INIT_LE_READ_BUFFER_SIZE: 1748 if (hci_le_supported()){ 1749 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1750 hci_send_cmd(&hci_le_read_buffer_size); 1751 break; 1752 } 1753 1754 /* fall through */ 1755 1756 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1757 // skip write le host if not supported (e.g. on LE only EM9301) 1758 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1759 // LE Supported Host = 1, Simultaneous Host = 0 1760 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1761 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1762 break; 1763 } 1764 1765 /* fall through */ 1766 1767 case HCI_INIT_LE_SET_EVENT_MASK: 1768 if (hci_le_supported()){ 1769 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1770 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1771 break; 1772 } 1773 #endif 1774 1775 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1776 /* fall through */ 1777 1778 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1779 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1780 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1781 hci_send_cmd(&hci_le_read_maximum_data_length); 1782 break; 1783 } 1784 1785 /* fall through */ 1786 1787 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1788 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1789 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1790 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1791 break; 1792 } 1793 #endif 1794 1795 #ifdef ENABLE_LE_CENTRAL 1796 /* fall through */ 1797 1798 case HCI_INIT_READ_WHITE_LIST_SIZE: 1799 if (hci_le_supported()){ 1800 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1801 hci_send_cmd(&hci_le_read_white_list_size); 1802 break; 1803 } 1804 1805 #endif 1806 1807 /* fall through */ 1808 1809 case HCI_INIT_DONE: 1810 hci_stack->substate = HCI_INIT_DONE; 1811 // main init sequence complete 1812 #ifdef ENABLE_CLASSIC 1813 // check if initial Classic GAP Tasks are completed 1814 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 1815 hci_run_gap_tasks_classic(); 1816 break; 1817 } 1818 #endif 1819 #ifdef ENABLE_BLE 1820 #ifdef ENABLE_LE_CENTRAL 1821 // check if initial LE GAP Tasks are completed 1822 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 1823 hci_run_general_gap_le(); 1824 break; 1825 } 1826 #endif 1827 #endif 1828 hci_init_done(); 1829 break; 1830 1831 default: 1832 return; 1833 } 1834 } 1835 1836 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1837 bool command_completed = false; 1838 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1839 uint16_t opcode = little_endian_read_16(packet,3); 1840 if (opcode == hci_stack->last_cmd_opcode){ 1841 command_completed = true; 1842 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1843 } else { 1844 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1845 } 1846 } 1847 1848 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1849 uint8_t status = packet[2]; 1850 uint16_t opcode = little_endian_read_16(packet,4); 1851 if (opcode == hci_stack->last_cmd_opcode){ 1852 if (status){ 1853 command_completed = true; 1854 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1855 } else { 1856 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1857 } 1858 } else { 1859 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1860 } 1861 } 1862 #ifndef HAVE_HOST_CONTROLLER_API 1863 // Vendor == CSR 1864 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1865 // TODO: track actual command 1866 command_completed = true; 1867 } 1868 1869 // Vendor == Toshiba 1870 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1871 // TODO: track actual command 1872 command_completed = true; 1873 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1874 hci_stack->num_cmd_packets = 1; 1875 } 1876 #endif 1877 1878 return command_completed; 1879 } 1880 1881 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1882 1883 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1884 1885 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1886 1887 #ifndef HAVE_HOST_CONTROLLER_API 1888 1889 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1890 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1891 // 1892 // HCI Reset 1893 // Timeout 100 ms 1894 // HCI Reset 1895 // Command Complete Reset 1896 // HCI Read Local Version Information 1897 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1898 // hang... 1899 // 1900 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1901 if (!command_completed 1902 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1903 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1904 1905 uint16_t opcode = little_endian_read_16(packet,3); 1906 if (opcode == hci_reset.opcode){ 1907 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1908 return; 1909 } 1910 } 1911 1912 // CSR & H5 1913 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1914 if (!command_completed 1915 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1916 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1917 1918 uint16_t opcode = little_endian_read_16(packet,3); 1919 if (opcode == hci_reset.opcode){ 1920 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1921 return; 1922 } 1923 } 1924 1925 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1926 // fix: Correct substate and behave as command below 1927 if (command_completed){ 1928 switch (hci_stack->substate){ 1929 case HCI_INIT_SEND_RESET: 1930 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1931 break; 1932 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1933 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1934 break; 1935 default: 1936 break; 1937 } 1938 } 1939 1940 #endif 1941 1942 if (!command_completed) return; 1943 1944 bool need_baud_change = false; 1945 bool need_addr_change = false; 1946 1947 #ifndef HAVE_HOST_CONTROLLER_API 1948 need_baud_change = hci_stack->config 1949 && hci_stack->chipset 1950 && hci_stack->chipset->set_baudrate_command 1951 && hci_stack->hci_transport->set_baudrate 1952 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1953 1954 need_addr_change = hci_stack->custom_bd_addr_set 1955 && hci_stack->chipset 1956 && hci_stack->chipset->set_bd_addr_command; 1957 #endif 1958 1959 switch(hci_stack->substate){ 1960 1961 #ifndef HAVE_HOST_CONTROLLER_API 1962 case HCI_INIT_SEND_RESET: 1963 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1964 // fix: just correct substate and behave as command below 1965 1966 /* fall through */ 1967 #endif 1968 1969 case HCI_INIT_W4_SEND_RESET: 1970 btstack_run_loop_remove_timer(&hci_stack->timeout); 1971 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1972 return; 1973 1974 #ifndef HAVE_HOST_CONTROLLER_API 1975 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1976 // for STLC2500D, baud rate change already happened. 1977 // for others, baud rate gets changed now 1978 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1979 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1980 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1981 hci_stack->hci_transport->set_baudrate(baud_rate); 1982 } 1983 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1984 return; 1985 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1986 btstack_run_loop_remove_timer(&hci_stack->timeout); 1987 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1988 return; 1989 case HCI_INIT_W4_CUSTOM_INIT: 1990 // repeat custom init 1991 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1992 return; 1993 #endif 1994 1995 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1996 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1997 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1998 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1999 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2000 return; 2001 } 2002 if (need_addr_change){ 2003 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2004 return; 2005 } 2006 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2007 return; 2008 #ifndef HAVE_HOST_CONTROLLER_API 2009 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2010 if (need_baud_change){ 2011 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2012 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2013 hci_stack->hci_transport->set_baudrate(baud_rate); 2014 } 2015 if (need_addr_change){ 2016 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2017 return; 2018 } 2019 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2020 return; 2021 case HCI_INIT_W4_SET_BD_ADDR: 2022 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2023 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2024 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2025 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2026 return; 2027 } 2028 // skipping st warm boot 2029 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2030 return; 2031 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2032 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2033 return; 2034 #endif 2035 2036 case HCI_INIT_DONE: 2037 // set state if we came here by fall through 2038 hci_stack->substate = HCI_INIT_DONE; 2039 return; 2040 2041 default: 2042 break; 2043 } 2044 hci_initializing_next_state(); 2045 } 2046 2047 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2048 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2049 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2050 // check if the hci connection has been outgoing 2051 switch (conn->state){ 2052 case SEND_CREATE_CONNECTION: 2053 case RECEIVED_CONNECTION_REQUEST: 2054 break; 2055 default: 2056 return; 2057 } 2058 2059 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2060 bd_addr_t bd_address; 2061 (void)memcpy(&bd_address, conn->address, 6); 2062 2063 #ifdef ENABLE_CLASSIC 2064 // cache needed data 2065 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2066 #endif 2067 2068 // connection failed, remove entry 2069 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2070 btstack_memory_hci_connection_free( conn ); 2071 2072 #ifdef ENABLE_CLASSIC 2073 // notify client if dedicated bonding 2074 if (notify_dedicated_bonding_failed){ 2075 log_info("hci notify_dedicated_bonding_failed"); 2076 hci_emit_dedicated_bonding_result(bd_address, status); 2077 } 2078 2079 // if authentication error, also delete link key 2080 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2081 gap_drop_link_key_for_bd_addr(bd_address); 2082 } 2083 #else 2084 UNUSED(status); 2085 #endif 2086 } 2087 2088 #ifdef ENABLE_CLASSIC 2089 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2090 // SSP Controller 2091 if (features[6] & (1 << 3)){ 2092 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2093 } 2094 // eSCO 2095 if (features[3] & (1<<7)){ 2096 conn->remote_supported_features[0] |= 1; 2097 } 2098 // Extended features 2099 if (features[7] & (1<<7)){ 2100 conn->remote_supported_features[0] |= 2; 2101 } 2102 } 2103 2104 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2105 // SSP Host 2106 if (features[0] & (1 << 0)){ 2107 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2108 } 2109 // SC Host 2110 if (features[0] & (1 << 3)){ 2111 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2112 } 2113 } 2114 2115 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2116 // SC Controller 2117 if (features[1] & (1 << 0)){ 2118 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2119 } 2120 } 2121 2122 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2123 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2124 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2125 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2126 if (conn->bonding_flags & BONDING_DEDICATED){ 2127 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2128 } 2129 } 2130 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2131 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2132 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2133 } 2134 2135 #endif 2136 2137 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2138 // handle BT initialization 2139 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2140 hci_initializing_event_handler(packet, size); 2141 } 2142 2143 // help with BT sleep 2144 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2145 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2146 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2147 hci_initializing_next_state(); 2148 } 2149 } 2150 2151 #ifdef ENABLE_CLASSIC 2152 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2153 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2154 conn->encryption_key_size = encryption_key_size; 2155 2156 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2157 conn->requested_security_level = LEVEL_0; 2158 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2159 return; 2160 } 2161 2162 // Request remote features if not already done 2163 hci_trigger_remote_features_for_connection(conn); 2164 2165 // Request Authentication if not already done 2166 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2167 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2168 } 2169 #endif 2170 2171 static void hci_store_local_supported_commands(const uint8_t * packet){ 2172 hci_stack->local_supported_commands[0] = 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2174 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2175 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2176 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2177 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2178 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2179 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2180 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2181 hci_stack->local_supported_commands[1] = 2182 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2183 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2184 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2185 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2186 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2187 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2188 } 2189 2190 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2191 UNUSED(size); 2192 2193 uint16_t manufacturer; 2194 #ifdef ENABLE_CLASSIC 2195 hci_con_handle_t handle; 2196 hci_connection_t * conn; 2197 uint8_t status; 2198 #endif 2199 // get num cmd packets - limit to 1 to reduce complexity 2200 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2201 2202 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2203 switch (opcode){ 2204 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2205 if (packet[5]) break; 2206 // terminate, name 248 chars 2207 packet[6+248] = 0; 2208 log_info("local name: %s", &packet[6]); 2209 break; 2210 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2211 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2212 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2213 uint16_t acl_len = little_endian_read_16(packet, 6); 2214 uint16_t sco_len = packet[8]; 2215 2216 // determine usable ACL/SCO payload size 2217 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2218 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2219 2220 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2221 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2222 2223 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2224 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2225 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2226 } 2227 break; 2228 case HCI_OPCODE_HCI_READ_RSSI: 2229 if (packet[5] == ERROR_CODE_SUCCESS){ 2230 uint8_t event[5]; 2231 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2232 event[1] = 3; 2233 (void)memcpy(&event[2], &packet[6], 3); 2234 hci_emit_event(event, sizeof(event), 1); 2235 } 2236 break; 2237 #ifdef ENABLE_BLE 2238 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2239 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2240 hci_stack->le_acl_packets_total_num = packet[8]; 2241 // determine usable ACL payload size 2242 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2243 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2244 } 2245 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2246 break; 2247 #endif 2248 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2249 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2250 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2251 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2252 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); 2253 break; 2254 #endif 2255 #ifdef ENABLE_LE_CENTRAL 2256 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2257 hci_stack->le_whitelist_capacity = packet[6]; 2258 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2259 break; 2260 #endif 2261 case HCI_OPCODE_HCI_READ_BD_ADDR: 2262 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2263 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)); 2264 #ifdef ENABLE_CLASSIC 2265 if (hci_stack->link_key_db){ 2266 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2267 } 2268 #endif 2269 break; 2270 #ifdef ENABLE_CLASSIC 2271 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2272 hci_emit_discoverable_enabled(hci_stack->discoverable); 2273 break; 2274 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2275 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2276 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2277 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2278 hci_emit_event(event, sizeof(event), 1); 2279 } 2280 break; 2281 #endif 2282 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2283 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2284 2285 #ifdef ENABLE_CLASSIC 2286 // determine usable ACL packet types based on host buffer size and supported features 2287 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2288 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2289 #endif 2290 // Classic/LE 2291 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2292 break; 2293 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2294 manufacturer = little_endian_read_16(packet, 10); 2295 // map Cypress to Broadcom 2296 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2297 log_info("Treat Cypress as Broadcom"); 2298 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2299 little_endian_store_16(packet, 10, manufacturer); 2300 } 2301 hci_stack->manufacturer = manufacturer; 2302 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2303 break; 2304 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2305 hci_store_local_supported_commands(packet); 2306 break; 2307 #ifdef ENABLE_CLASSIC 2308 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2309 if (packet[5]) return; 2310 hci_stack->synchronous_flow_control_enabled = 1; 2311 break; 2312 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2313 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2314 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2315 conn = hci_connection_for_handle(handle); 2316 if (conn != NULL) { 2317 uint8_t key_size = 0; 2318 if (status == 0){ 2319 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2320 log_info("Handle %04x key Size: %u", handle, key_size); 2321 } else { 2322 key_size = 1; 2323 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2324 } 2325 hci_handle_read_encryption_key_size_complete(conn, key_size); 2326 } 2327 break; 2328 // assert pairing complete event is emitted. 2329 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2330 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2331 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2332 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2333 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2334 // lookup connection by gap pairing addr 2335 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2336 if (conn == NULL) break; 2337 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2338 break; 2339 2340 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2341 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2342 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2343 uint8_t event[67]; 2344 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2345 event[1] = 65; 2346 (void)memset(&event[2], 0, 65); 2347 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2348 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2349 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2350 event[2] = 3; 2351 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2352 } else { 2353 event[2] = 1; 2354 } 2355 } 2356 hci_emit_event(event, sizeof(event), 0); 2357 break; 2358 } 2359 2360 // note: only needed if user does not provide OOB data 2361 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2362 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2363 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2364 if (conn == NULL) break; 2365 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2366 break; 2367 #endif 2368 #endif 2369 default: 2370 break; 2371 } 2372 } 2373 2374 #ifdef ENABLE_BLE 2375 static void event_handle_le_connection_complete(const uint8_t * packet){ 2376 bd_addr_t addr; 2377 bd_addr_type_t addr_type; 2378 hci_connection_t * conn; 2379 2380 // Connection management 2381 reverse_bd_addr(&packet[8], addr); 2382 addr_type = (bd_addr_type_t)packet[7]; 2383 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2384 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2385 2386 #ifdef ENABLE_LE_CENTRAL 2387 // handle error: error is reported only to the initiator -> outgoing connection 2388 if (packet[3]){ 2389 2390 // handle cancelled outgoing connection 2391 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2392 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2393 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2394 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2395 // reset state 2396 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2397 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2398 // get outgoing connection conn struct for direct connect 2399 conn = gap_get_outgoing_connection(); 2400 } 2401 2402 // outgoing le connection establishment is done 2403 if (conn){ 2404 // remove entry 2405 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2406 btstack_memory_hci_connection_free( conn ); 2407 } 2408 return; 2409 } 2410 #endif 2411 2412 // on success, both hosts receive connection complete event 2413 if (packet[6] == HCI_ROLE_MASTER){ 2414 #ifdef ENABLE_LE_CENTRAL 2415 // if we're master on an le connection, it was an outgoing connection and we're done with it 2416 // note: no hci_connection_t object exists yet for connect with whitelist 2417 if (hci_is_le_connection_type(addr_type)){ 2418 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2419 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2420 } 2421 #endif 2422 } else { 2423 #ifdef ENABLE_LE_PERIPHERAL 2424 // if we're slave, it was an incoming connection, advertisements have stopped 2425 hci_stack->le_advertisements_active = false; 2426 #endif 2427 } 2428 2429 // LE connections are auto-accepted, so just create a connection if there isn't one already 2430 if (!conn){ 2431 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2432 } 2433 2434 // no memory, sorry. 2435 if (!conn){ 2436 return; 2437 } 2438 2439 conn->state = OPEN; 2440 conn->role = packet[6]; 2441 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2442 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2443 2444 #ifdef ENABLE_LE_PERIPHERAL 2445 if (packet[6] == HCI_ROLE_SLAVE){ 2446 hci_update_advertisements_enabled_for_current_roles(); 2447 } 2448 #endif 2449 2450 // init unenhanced att bearer mtu 2451 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2452 conn->att_connection.mtu_exchanged = false; 2453 2454 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2455 2456 // restart timer 2457 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2458 // btstack_run_loop_add_timer(&conn->timeout); 2459 2460 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2461 2462 hci_emit_nr_connections_changed(); 2463 } 2464 #endif 2465 2466 #ifdef ENABLE_CLASSIC 2467 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){ 2468 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2469 // LEVEL_4 is tested by l2cap 2470 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2471 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2472 if (level >= LEVEL_3){ 2473 // MITM not possible without keyboard or display 2474 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2475 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2476 2477 // MITM possible if one side has keyboard and the other has keyboard or display 2478 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2479 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2480 2481 // MITM not possible if one side has only display and other side has no keyboard 2482 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2483 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2484 } 2485 // LEVEL 2 requires SSP, which is a given 2486 return true; 2487 } 2488 2489 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2490 uint16_t i; 2491 for (i=0; i < size ; i++){ 2492 if (data[i] != 0) { 2493 return false; 2494 } 2495 } 2496 return true; 2497 } 2498 2499 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2500 // get requested security level 2501 gap_security_level_t requested_security_level = conn->requested_security_level; 2502 if (hci_stack->gap_secure_connections_only_mode){ 2503 requested_security_level = LEVEL_4; 2504 } 2505 2506 // assess security: LEVEL 4 requires SC 2507 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2508 if ((requested_security_level == LEVEL_4) && 2509 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2510 !hci_remote_sc_enabled(conn)){ 2511 log_info("Level 4 required, but SC not supported -> abort"); 2512 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2513 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2514 return; 2515 } 2516 2517 // assess security based on io capabilities 2518 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2519 // responder: fully validate io caps of both sides as well as OOB data 2520 bool security_possible = false; 2521 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2522 2523 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2524 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2525 // so we merge the OOB data availability 2526 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2527 if (conn->classic_oob_c_192 != NULL){ 2528 have_oob_data |= 1; 2529 } 2530 if (conn->classic_oob_c_256 != NULL){ 2531 have_oob_data |= 2; 2532 } 2533 // for up to Level 3, either P-192 as well as P-256 will do 2534 // 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 2535 // if remote does not SC, we should not receive P-256 data either 2536 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2537 security_possible = true; 2538 } 2539 // for Level 4, P-256 is needed 2540 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2541 security_possible = true; 2542 } 2543 #endif 2544 2545 if (security_possible == false){ 2546 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2547 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2548 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2549 return; 2550 } 2551 } else { 2552 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2553 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2554 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2555 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2556 log_info("Level 3+ required, but no input/output -> abort"); 2557 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2558 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2559 return; 2560 } 2561 #endif 2562 #endif 2563 } 2564 2565 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2566 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2567 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2568 } else { 2569 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2570 } 2571 #endif 2572 } 2573 2574 #endif 2575 2576 static void event_handler(uint8_t *packet, uint16_t size){ 2577 2578 uint16_t event_length = packet[1]; 2579 2580 // assert packet is complete 2581 if (size != (event_length + 2u)){ 2582 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2583 return; 2584 } 2585 2586 bd_addr_type_t addr_type; 2587 hci_con_handle_t handle; 2588 hci_connection_t * conn; 2589 int i; 2590 int create_connection_cmd; 2591 2592 #ifdef ENABLE_CLASSIC 2593 hci_link_type_t link_type; 2594 bd_addr_t addr; 2595 #endif 2596 2597 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2598 2599 switch (hci_event_packet_get_type(packet)) { 2600 2601 case HCI_EVENT_COMMAND_COMPLETE: 2602 handle_command_complete_event(packet, size); 2603 break; 2604 2605 case HCI_EVENT_COMMAND_STATUS: 2606 // get num cmd packets - limit to 1 to reduce complexity 2607 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2608 2609 // check command status to detected failed outgoing connections 2610 create_connection_cmd = 0; 2611 #ifdef ENABLE_CLASSIC 2612 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2613 create_connection_cmd = 1; 2614 } 2615 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2616 create_connection_cmd = 1; 2617 } 2618 #endif 2619 #ifdef ENABLE_LE_CENTRAL 2620 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2621 create_connection_cmd = 1; 2622 } 2623 #endif 2624 if (create_connection_cmd) { 2625 uint8_t status = hci_event_command_status_get_status(packet); 2626 addr_type = hci_stack->outgoing_addr_type; 2627 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2628 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2629 2630 // reset outgoing address info 2631 memset(hci_stack->outgoing_addr, 0, 6); 2632 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2633 2634 // on error 2635 if (status != ERROR_CODE_SUCCESS){ 2636 #ifdef ENABLE_LE_CENTRAL 2637 if (hci_is_le_connection_type(addr_type)){ 2638 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2639 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2640 } 2641 #endif 2642 // error => outgoing connection failed 2643 if (conn != NULL){ 2644 hci_handle_connection_failed(conn, status); 2645 } 2646 } 2647 } 2648 2649 #ifdef ENABLE_CLASSIC 2650 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2651 uint8_t status = hci_event_command_status_get_status(packet); 2652 log_info("command status (inquiry), status %x", status); 2653 if (status == ERROR_CODE_SUCCESS) { 2654 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2655 } else { 2656 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2657 } 2658 } 2659 #endif 2660 break; 2661 2662 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2663 if (size < 3) return; 2664 uint16_t num_handles = packet[2]; 2665 if (size != (3u + num_handles * 4u)) return; 2666 uint16_t offset = 3; 2667 for (i=0; i<num_handles;i++){ 2668 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2669 offset += 2u; 2670 uint16_t num_packets = little_endian_read_16(packet, offset); 2671 offset += 2u; 2672 2673 conn = hci_connection_for_handle(handle); 2674 if (!conn){ 2675 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2676 continue; 2677 } 2678 2679 if (conn->num_packets_sent >= num_packets){ 2680 conn->num_packets_sent -= num_packets; 2681 } else { 2682 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2683 conn->num_packets_sent = 0; 2684 } 2685 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2686 2687 #ifdef ENABLE_CLASSIC 2688 // For SCO, we do the can_send_now_check here 2689 hci_notify_if_sco_can_send_now(); 2690 #endif 2691 } 2692 break; 2693 } 2694 2695 #ifdef ENABLE_CLASSIC 2696 case HCI_EVENT_INQUIRY_COMPLETE: 2697 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2698 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2699 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2700 hci_emit_event(event, sizeof(event), 1); 2701 } 2702 break; 2703 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2704 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2705 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2706 } 2707 break; 2708 case HCI_EVENT_CONNECTION_REQUEST: 2709 reverse_bd_addr(&packet[2], addr); 2710 link_type = (hci_link_type_t) packet[11]; 2711 2712 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2713 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2714 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2715 bd_addr_copy(hci_stack->decline_addr, addr); 2716 break; 2717 } 2718 2719 if (hci_stack->gap_classic_accept_callback != NULL){ 2720 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2721 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2722 bd_addr_copy(hci_stack->decline_addr, addr); 2723 break; 2724 } 2725 } 2726 2727 // TODO: eval COD 8-10 2728 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2729 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2730 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2731 if (!conn) { 2732 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2733 } 2734 if (!conn) { 2735 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2736 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2737 bd_addr_copy(hci_stack->decline_addr, addr); 2738 hci_run(); 2739 // avoid event to higher layer 2740 return; 2741 } 2742 conn->role = HCI_ROLE_SLAVE; 2743 conn->state = RECEIVED_CONNECTION_REQUEST; 2744 // store info about eSCO 2745 if (link_type == HCI_LINK_TYPE_ESCO){ 2746 conn->remote_supported_features[0] |= 1; 2747 } 2748 hci_run(); 2749 break; 2750 2751 case HCI_EVENT_CONNECTION_COMPLETE: 2752 // Connection management 2753 reverse_bd_addr(&packet[5], addr); 2754 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2755 addr_type = BD_ADDR_TYPE_ACL; 2756 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2757 if (conn) { 2758 if (!packet[2]){ 2759 conn->state = OPEN; 2760 conn->con_handle = little_endian_read_16(packet, 3); 2761 2762 // queue set supervision timeout if we're master 2763 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2764 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2765 } 2766 2767 // restart timer 2768 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2769 btstack_run_loop_add_timer(&conn->timeout); 2770 2771 // trigger remote features for dedicated bonding 2772 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2773 hci_trigger_remote_features_for_connection(conn); 2774 } 2775 2776 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2777 2778 hci_emit_nr_connections_changed(); 2779 } else { 2780 // connection failed 2781 hci_handle_connection_failed(conn, packet[2]); 2782 } 2783 } 2784 break; 2785 2786 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2787 reverse_bd_addr(&packet[5], addr); 2788 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2789 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2790 if (packet[2]){ 2791 // connection failed 2792 if (conn){ 2793 hci_handle_connection_failed(conn, packet[2]); 2794 } 2795 break; 2796 } 2797 if (!conn) { 2798 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2799 } 2800 if (!conn) { 2801 break; 2802 } 2803 conn->state = OPEN; 2804 conn->con_handle = little_endian_read_16(packet, 3); 2805 2806 #ifdef ENABLE_SCO_OVER_HCI 2807 // update SCO 2808 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2809 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2810 } 2811 // trigger can send now 2812 if (hci_have_usb_transport()){ 2813 hci_stack->sco_can_send_now = true; 2814 } 2815 #endif 2816 #ifdef HAVE_SCO_TRANSPORT 2817 // configure sco transport 2818 if (hci_stack->sco_transport != NULL){ 2819 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2820 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2821 } 2822 #endif 2823 break; 2824 2825 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2826 handle = little_endian_read_16(packet, 3); 2827 conn = hci_connection_for_handle(handle); 2828 if (!conn) break; 2829 if (!packet[2]){ 2830 const uint8_t * features = &packet[5]; 2831 hci_handle_remote_features_page_0(conn, features); 2832 2833 // read extended features if possible 2834 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2835 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2836 break; 2837 } 2838 } 2839 hci_handle_remote_features_received(conn); 2840 break; 2841 2842 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2843 handle = little_endian_read_16(packet, 3); 2844 conn = hci_connection_for_handle(handle); 2845 if (!conn) break; 2846 // status = ok, page = 1 2847 if (!packet[2]) { 2848 uint8_t page_number = packet[5]; 2849 uint8_t maximum_page_number = packet[6]; 2850 const uint8_t * features = &packet[7]; 2851 bool done = false; 2852 switch (page_number){ 2853 case 1: 2854 hci_handle_remote_features_page_1(conn, features); 2855 if (maximum_page_number >= 2){ 2856 // get Secure Connections (Controller) from Page 2 if available 2857 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2858 } else { 2859 // otherwise, assume SC (Controller) == SC (Host) 2860 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2861 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2862 } 2863 done = true; 2864 } 2865 break; 2866 case 2: 2867 hci_handle_remote_features_page_2(conn, features); 2868 done = true; 2869 break; 2870 default: 2871 break; 2872 } 2873 if (!done) break; 2874 } 2875 hci_handle_remote_features_received(conn); 2876 break; 2877 2878 case HCI_EVENT_LINK_KEY_REQUEST: 2879 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2880 hci_event_link_key_request_get_bd_addr(packet, addr); 2881 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2882 if (!conn) break; 2883 2884 // lookup link key in db if not cached 2885 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2886 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2887 } 2888 2889 // response sent by hci_run() 2890 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2891 #endif 2892 break; 2893 2894 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2895 hci_event_link_key_request_get_bd_addr(packet, addr); 2896 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2897 if (!conn) break; 2898 2899 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2900 2901 // CVE-2020-26555: ignore NULL link key 2902 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2903 if (btstack_is_null(&packet[8], 16)) break; 2904 2905 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2906 // Change Connection Encryption keeps link key type 2907 if (link_key_type != CHANGED_COMBINATION_KEY){ 2908 conn->link_key_type = link_key_type; 2909 } 2910 2911 // cache link key. link keys stored in little-endian format for legacy reasons 2912 memcpy(&conn->link_key, &packet[8], 16); 2913 2914 // only store link key: 2915 // - if bondable enabled 2916 if (hci_stack->bondable == false) break; 2917 // - if security level sufficient 2918 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2919 // - for SSP, also check if remote side requested bonding as well 2920 if (conn->link_key_type != COMBINATION_KEY){ 2921 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2922 if (!remote_bonding){ 2923 break; 2924 } 2925 } 2926 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2927 break; 2928 } 2929 2930 case HCI_EVENT_PIN_CODE_REQUEST: 2931 hci_event_pin_code_request_get_bd_addr(packet, addr); 2932 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2933 if (!conn) break; 2934 2935 hci_pairing_started(conn, false); 2936 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2937 if (!hci_stack->bondable ){ 2938 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2939 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2940 hci_run(); 2941 return; 2942 } 2943 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2944 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2945 log_info("Level 4 required, but SC not supported -> abort"); 2946 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2947 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2948 hci_run(); 2949 return; 2950 } 2951 break; 2952 2953 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2954 hci_event_io_capability_response_get_bd_addr(packet, addr); 2955 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2956 if (!conn) break; 2957 2958 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2959 hci_pairing_started(conn, true); 2960 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2961 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2962 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2963 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2964 #endif 2965 break; 2966 2967 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2968 hci_event_io_capability_response_get_bd_addr(packet, addr); 2969 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2970 if (!conn) break; 2971 2972 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2973 hci_connection_timestamp(conn); 2974 hci_pairing_started(conn, true); 2975 break; 2976 2977 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2978 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2979 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2980 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2981 if (!conn) break; 2982 2983 hci_connection_timestamp(conn); 2984 2985 hci_pairing_started(conn, true); 2986 2987 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2988 break; 2989 #endif 2990 2991 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2992 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2993 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2994 if (!conn) break; 2995 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2996 if (hci_stack->ssp_auto_accept){ 2997 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2998 }; 2999 } else { 3000 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3001 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3002 // don't forward event to app 3003 hci_run(); 3004 return; 3005 } 3006 break; 3007 3008 case HCI_EVENT_USER_PASSKEY_REQUEST: 3009 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3010 if (hci_stack->ssp_auto_accept){ 3011 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3012 }; 3013 break; 3014 3015 case HCI_EVENT_MODE_CHANGE: 3016 handle = hci_event_mode_change_get_handle(packet); 3017 conn = hci_connection_for_handle(handle); 3018 if (!conn) break; 3019 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3020 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3021 break; 3022 #endif 3023 3024 case HCI_EVENT_ENCRYPTION_CHANGE: 3025 handle = hci_event_encryption_change_get_connection_handle(packet); 3026 conn = hci_connection_for_handle(handle); 3027 if (!conn) break; 3028 if (hci_event_encryption_change_get_status(packet) == 0u) { 3029 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3030 if (encryption_enabled){ 3031 if (hci_is_le_connection(conn)){ 3032 // For LE, we accept connection as encrypted 3033 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3034 } 3035 #ifdef ENABLE_CLASSIC 3036 else { 3037 3038 // dedicated bonding: send result and disconnect 3039 if (conn->bonding_flags & BONDING_DEDICATED){ 3040 conn->bonding_flags &= ~BONDING_DEDICATED; 3041 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3042 conn->bonding_status = packet[2]; 3043 break; 3044 } 3045 3046 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3047 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3048 bool connected_uses_aes_ccm = encryption_enabled == 2; 3049 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3050 log_info("SC during pairing, but only E0 now -> abort"); 3051 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3052 break; 3053 } 3054 3055 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3056 if (connected_uses_aes_ccm){ 3057 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3058 } 3059 3060 #ifdef ENABLE_TESTING_SUPPORT 3061 // work around for issue with PTS dongle 3062 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3063 #endif 3064 3065 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3066 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3067 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3068 } else { 3069 // if not, pretend everything is perfect 3070 hci_handle_read_encryption_key_size_complete(conn, 16); 3071 } 3072 } 3073 #endif 3074 } else { 3075 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3076 } 3077 } 3078 3079 break; 3080 3081 #ifdef ENABLE_CLASSIC 3082 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3083 handle = hci_event_authentication_complete_get_connection_handle(packet); 3084 conn = hci_connection_for_handle(handle); 3085 if (!conn) break; 3086 3087 // clear authentication active flag 3088 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3089 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3090 3091 // authenticated only if auth status == 0 3092 if (hci_event_authentication_complete_get_status(packet) == 0){ 3093 // authenticated 3094 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3095 3096 // If not already encrypted, start encryption 3097 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3098 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3099 break; 3100 } 3101 } 3102 3103 // emit updated security level 3104 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3105 break; 3106 3107 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3108 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3109 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3110 if (!conn) break; 3111 3112 // treat successfully paired connection as authenticated 3113 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3114 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3115 } 3116 3117 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3118 break; 3119 #endif 3120 3121 // HCI_EVENT_DISCONNECTION_COMPLETE 3122 // has been split, to first notify stack before shutting connection down 3123 // see end of function, too. 3124 case HCI_EVENT_DISCONNECTION_COMPLETE: 3125 if (packet[2]) break; // status != 0 3126 handle = little_endian_read_16(packet, 3); 3127 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3128 if (hci_stack->acl_fragmentation_total_size > 0u) { 3129 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3130 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3131 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3132 hci_stack->acl_fragmentation_total_size = 0; 3133 hci_stack->acl_fragmentation_pos = 0; 3134 if (release_buffer){ 3135 hci_release_packet_buffer(); 3136 } 3137 } 3138 } 3139 3140 conn = hci_connection_for_handle(handle); 3141 if (!conn) break; 3142 #ifdef ENABLE_CLASSIC 3143 // pairing failed if it was ongoing 3144 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3145 #endif 3146 3147 // emit dedicatd bonding event 3148 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3149 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3150 } 3151 3152 // mark connection for shutdown, stop timers, reset state 3153 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3154 hci_connection_stop_timer(conn); 3155 hci_connection_init(conn); 3156 3157 #ifdef ENABLE_BLE 3158 #ifdef ENABLE_LE_PERIPHERAL 3159 // re-enable advertisements for le connections if active 3160 if (hci_is_le_connection(conn)){ 3161 hci_update_advertisements_enabled_for_current_roles(); 3162 } 3163 #endif 3164 #endif 3165 break; 3166 3167 case HCI_EVENT_HARDWARE_ERROR: 3168 log_error("Hardware Error: 0x%02x", packet[2]); 3169 if (hci_stack->hardware_error_callback){ 3170 (*hci_stack->hardware_error_callback)(packet[2]); 3171 } else { 3172 // if no special requests, just reboot stack 3173 hci_power_control_off(); 3174 hci_power_control_on(); 3175 } 3176 break; 3177 3178 #ifdef ENABLE_CLASSIC 3179 case HCI_EVENT_ROLE_CHANGE: 3180 if (packet[2]) break; // status != 0 3181 reverse_bd_addr(&packet[3], addr); 3182 addr_type = BD_ADDR_TYPE_ACL; 3183 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3184 if (!conn) break; 3185 conn->role = packet[9]; 3186 break; 3187 #endif 3188 3189 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3190 // release packet buffer only for asynchronous transport and if there are not further fragements 3191 if (hci_transport_synchronous()) { 3192 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3193 return; // instead of break: to avoid re-entering hci_run() 3194 } 3195 hci_stack->acl_fragmentation_tx_active = 0; 3196 if (hci_stack->acl_fragmentation_total_size) break; 3197 hci_release_packet_buffer(); 3198 3199 // L2CAP receives this event via the hci_emit_event below 3200 3201 #ifdef ENABLE_CLASSIC 3202 // For SCO, we do the can_send_now_check here 3203 hci_notify_if_sco_can_send_now(); 3204 #endif 3205 break; 3206 3207 #ifdef ENABLE_CLASSIC 3208 case HCI_EVENT_SCO_CAN_SEND_NOW: 3209 // For SCO, we do the can_send_now_check here 3210 hci_stack->sco_can_send_now = true; 3211 hci_notify_if_sco_can_send_now(); 3212 return; 3213 3214 // explode inquriy results for easier consumption 3215 case HCI_EVENT_INQUIRY_RESULT: 3216 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3217 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3218 gap_inquiry_explode(packet, size); 3219 break; 3220 #endif 3221 3222 #ifdef ENABLE_BLE 3223 case HCI_EVENT_LE_META: 3224 switch (packet[2]){ 3225 #ifdef ENABLE_LE_CENTRAL 3226 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3227 // log_info("advertising report received"); 3228 if (!hci_stack->le_scanning_enabled) break; 3229 le_handle_advertisement_report(packet, size); 3230 break; 3231 #endif 3232 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3233 event_handle_le_connection_complete(packet); 3234 break; 3235 3236 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3237 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3238 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3239 conn = hci_connection_for_handle(handle); 3240 if (!conn) break; 3241 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3242 break; 3243 3244 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3245 // connection 3246 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3247 conn = hci_connection_for_handle(handle); 3248 if (conn) { 3249 // read arguments 3250 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3251 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3252 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3253 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3254 3255 // validate against current connection parameter range 3256 le_connection_parameter_range_t existing_range; 3257 gap_get_connection_parameter_range(&existing_range); 3258 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3259 if (update_parameter){ 3260 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3261 conn->le_conn_interval_min = le_conn_interval_min; 3262 conn->le_conn_interval_max = le_conn_interval_max; 3263 conn->le_conn_latency = le_conn_latency; 3264 conn->le_supervision_timeout = le_supervision_timeout; 3265 } else { 3266 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3267 } 3268 } 3269 break; 3270 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3271 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3272 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3273 conn = hci_connection_for_handle(handle); 3274 if (conn) { 3275 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3276 } 3277 break; 3278 #endif 3279 default: 3280 break; 3281 } 3282 break; 3283 #endif 3284 case HCI_EVENT_VENDOR_SPECIFIC: 3285 // Vendor specific commands often create vendor specific event instead of num completed packets 3286 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3287 switch (hci_stack->manufacturer){ 3288 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3289 hci_stack->num_cmd_packets = 1; 3290 break; 3291 default: 3292 break; 3293 } 3294 break; 3295 default: 3296 break; 3297 } 3298 3299 handle_event_for_current_stack_state(packet, size); 3300 3301 // notify upper stack 3302 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3303 3304 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3305 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3306 handle = little_endian_read_16(packet, 3); 3307 hci_connection_t * aConn = hci_connection_for_handle(handle); 3308 // discard connection if app did not trigger a reconnect in the event handler 3309 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3310 hci_shutdown_connection(aConn); 3311 } 3312 } 3313 3314 // execute main loop 3315 hci_run(); 3316 } 3317 3318 #ifdef ENABLE_CLASSIC 3319 3320 #ifdef ENABLE_SCO_OVER_HCI 3321 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3322 static void sco_schedule_tx(hci_connection_t * conn); 3323 3324 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3325 log_debug("SCO TX Timeout"); 3326 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3327 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3328 if (!conn) return; 3329 3330 // trigger send 3331 conn->sco_tx_ready = 1; 3332 // extra packet if CVSD but SCO buffer is too short 3333 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3334 conn->sco_tx_ready++; 3335 } 3336 hci_notify_if_sco_can_send_now(); 3337 } 3338 3339 3340 #define SCO_TX_AFTER_RX_MS (6) 3341 3342 static void sco_schedule_tx(hci_connection_t * conn){ 3343 3344 uint32_t now = btstack_run_loop_get_time_ms(); 3345 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3346 int time_delta_ms = sco_tx_ms - now; 3347 3348 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3349 3350 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3351 btstack_run_loop_remove_timer(timer); 3352 btstack_run_loop_set_timer(timer, time_delta_ms); 3353 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3354 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3355 btstack_run_loop_add_timer(timer); 3356 } 3357 #endif 3358 3359 static void sco_handler(uint8_t * packet, uint16_t size){ 3360 // lookup connection struct 3361 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3362 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3363 if (!conn) return; 3364 3365 #ifdef ENABLE_SCO_OVER_HCI 3366 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3367 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3368 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3369 packet[2] = 0x3c; 3370 memmove(&packet[3], &packet[23], 63); 3371 size = 63; 3372 } 3373 } 3374 3375 if (hci_have_usb_transport()){ 3376 // Nothing to do 3377 } else { 3378 // 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); 3379 if (hci_stack->synchronous_flow_control_enabled == 0){ 3380 uint32_t now = btstack_run_loop_get_time_ms(); 3381 3382 if (!conn->sco_rx_valid){ 3383 // ignore first 10 packets 3384 conn->sco_rx_count++; 3385 // log_debug("sco rx count %u", conn->sco_rx_count); 3386 if (conn->sco_rx_count == 10) { 3387 // use first timestamp as is and pretent it just started 3388 conn->sco_rx_ms = now; 3389 conn->sco_rx_valid = 1; 3390 conn->sco_rx_count = 0; 3391 sco_schedule_tx(conn); 3392 } 3393 } else { 3394 // track expected arrival timme 3395 conn->sco_rx_count++; 3396 conn->sco_rx_ms += 7; 3397 int delta = (int32_t) (now - conn->sco_rx_ms); 3398 if (delta > 0){ 3399 conn->sco_rx_ms++; 3400 } 3401 // log_debug("sco rx %u", conn->sco_rx_ms); 3402 sco_schedule_tx(conn); 3403 } 3404 } 3405 } 3406 #endif 3407 3408 // deliver to app 3409 if (hci_stack->sco_packet_handler) { 3410 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3411 } 3412 3413 #ifdef HAVE_SCO_TRANSPORT 3414 // We can send one packet for each received packet 3415 conn->sco_tx_ready++; 3416 hci_notify_if_sco_can_send_now(); 3417 #endif 3418 3419 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3420 conn->num_packets_completed++; 3421 hci_stack->host_completed_packets = 1; 3422 hci_run(); 3423 #endif 3424 } 3425 #endif 3426 3427 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3428 hci_dump_packet(packet_type, 1, packet, size); 3429 switch (packet_type) { 3430 case HCI_EVENT_PACKET: 3431 event_handler(packet, size); 3432 break; 3433 case HCI_ACL_DATA_PACKET: 3434 acl_handler(packet, size); 3435 break; 3436 #ifdef ENABLE_CLASSIC 3437 case HCI_SCO_DATA_PACKET: 3438 sco_handler(packet, size); 3439 break; 3440 #endif 3441 default: 3442 break; 3443 } 3444 } 3445 3446 /** 3447 * @brief Add event packet handler. 3448 */ 3449 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3450 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3451 } 3452 3453 /** 3454 * @brief Remove event packet handler. 3455 */ 3456 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3457 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3458 } 3459 3460 /** Register HCI packet handlers */ 3461 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3462 hci_stack->acl_packet_handler = handler; 3463 } 3464 3465 #ifdef ENABLE_CLASSIC 3466 /** 3467 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3468 */ 3469 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3470 hci_stack->sco_packet_handler = handler; 3471 } 3472 #endif 3473 3474 static void hci_state_reset(void){ 3475 // no connections yet 3476 hci_stack->connections = NULL; 3477 3478 // keep discoverable/connectable as this has been requested by the client(s) 3479 // hci_stack->discoverable = 0; 3480 // hci_stack->connectable = 0; 3481 // hci_stack->bondable = 1; 3482 // hci_stack->own_addr_type = 0; 3483 3484 // buffer is free 3485 hci_stack->hci_packet_buffer_reserved = false; 3486 3487 // no pending cmds 3488 hci_stack->decline_reason = 0; 3489 3490 hci_stack->secure_connections_active = false; 3491 3492 #ifdef ENABLE_CLASSIC 3493 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3494 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3495 3496 hci_stack->gap_tasks_classic = 3497 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3498 GAP_TASK_SET_CLASS_OF_DEVICE | 3499 GAP_TASK_SET_LOCAL_NAME | 3500 GAP_TASK_SET_EIR_DATA | 3501 GAP_TASK_WRITE_SCAN_ENABLE | 3502 GAP_TASK_WRITE_PAGE_TIMEOUT; 3503 #endif 3504 3505 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3506 hci_stack->classic_read_local_oob_data = false; 3507 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3508 #endif 3509 3510 // LE 3511 #ifdef ENABLE_BLE 3512 memset(hci_stack->le_random_address, 0, 6); 3513 hci_stack->le_random_address_set = 0; 3514 #endif 3515 #ifdef ENABLE_LE_CENTRAL 3516 hci_stack->le_scanning_active = false; 3517 hci_stack->le_scanning_param_update = true; 3518 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3519 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3520 hci_stack->le_whitelist_capacity = 0; 3521 #endif 3522 #ifdef ENABLE_LE_PERIPHERAL 3523 hci_stack->le_advertisements_active = false; 3524 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3525 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3526 } 3527 if (hci_stack->le_advertisements_data != NULL){ 3528 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3529 } 3530 #endif 3531 } 3532 3533 #ifdef ENABLE_CLASSIC 3534 /** 3535 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3536 */ 3537 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3538 // store and open remote device db 3539 hci_stack->link_key_db = link_key_db; 3540 if (hci_stack->link_key_db) { 3541 hci_stack->link_key_db->open(); 3542 } 3543 } 3544 #endif 3545 3546 void hci_init(const hci_transport_t *transport, const void *config){ 3547 3548 #ifdef HAVE_MALLOC 3549 if (!hci_stack) { 3550 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3551 } 3552 #else 3553 hci_stack = &hci_stack_static; 3554 #endif 3555 memset(hci_stack, 0, sizeof(hci_stack_t)); 3556 3557 // reference to use transport layer implementation 3558 hci_stack->hci_transport = transport; 3559 3560 // reference to used config 3561 hci_stack->config = config; 3562 3563 // setup pointer for outgoing packet buffer 3564 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3565 3566 // max acl payload size defined in config.h 3567 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3568 3569 // register packet handlers with transport 3570 transport->register_packet_handler(&packet_handler); 3571 3572 hci_stack->state = HCI_STATE_OFF; 3573 3574 // class of device 3575 hci_stack->class_of_device = 0x007a020c; // Smartphone 3576 3577 // bondable by default 3578 hci_stack->bondable = 1; 3579 3580 #ifdef ENABLE_CLASSIC 3581 // classic name 3582 hci_stack->local_name = default_classic_name; 3583 3584 // Master slave policy 3585 hci_stack->master_slave_policy = 1; 3586 3587 // Allow Role Switch 3588 hci_stack->allow_role_switch = 1; 3589 3590 // Default / minimum security level = 2 3591 hci_stack->gap_security_level = LEVEL_2; 3592 3593 // Default Security Mode 4 3594 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3595 3596 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3597 hci_stack->gap_required_encyrption_key_size = 7; 3598 3599 // Link Supervision Timeout 3600 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3601 3602 #endif 3603 3604 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3605 hci_stack->ssp_enable = 1; 3606 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3607 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3608 hci_stack->ssp_auto_accept = 1; 3609 3610 // Secure Connections: enable (requires support from Controller) 3611 hci_stack->secure_connections_enable = true; 3612 3613 // voice setting - signed 16 bit pcm data with CVSD over the air 3614 hci_stack->sco_voice_setting = 0x60; 3615 3616 #ifdef ENABLE_LE_CENTRAL 3617 // connection parameter to use for outgoing connections 3618 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3619 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3620 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3621 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3622 hci_stack->le_connection_latency = 4; // 4 3623 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3624 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3625 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3626 3627 // default LE Scanning 3628 hci_stack->le_scan_type = 0x1; // active 3629 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3630 hci_stack->le_scan_window = 0x30; // 30 ms 3631 #endif 3632 3633 #ifdef ENABLE_LE_PERIPHERAL 3634 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3635 #endif 3636 3637 // connection parameter range used to answer connection parameter update requests in l2cap 3638 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3639 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3640 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3641 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3642 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3643 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3644 3645 hci_state_reset(); 3646 } 3647 3648 void hci_deinit(void){ 3649 #ifdef HAVE_MALLOC 3650 if (hci_stack) { 3651 free(hci_stack); 3652 } 3653 #endif 3654 hci_stack = NULL; 3655 3656 #ifdef ENABLE_CLASSIC 3657 disable_l2cap_timeouts = 0; 3658 #endif 3659 } 3660 3661 /** 3662 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3663 */ 3664 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3665 hci_stack->chipset = chipset_driver; 3666 3667 // reset chipset driver - init is also called on power_up 3668 if (hci_stack->chipset && hci_stack->chipset->init){ 3669 hci_stack->chipset->init(hci_stack->config); 3670 } 3671 } 3672 3673 /** 3674 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3675 */ 3676 void hci_set_control(const btstack_control_t *hardware_control){ 3677 // references to used control implementation 3678 hci_stack->control = hardware_control; 3679 // init with transport config 3680 hardware_control->init(hci_stack->config); 3681 } 3682 3683 static void hci_discard_connections(void){ 3684 btstack_linked_list_iterator_t lit; 3685 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3686 while (btstack_linked_list_iterator_has_next(&lit)){ 3687 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3688 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3689 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3690 hci_shutdown_connection(connection); 3691 } 3692 } 3693 3694 void hci_close(void){ 3695 3696 #ifdef ENABLE_CLASSIC 3697 // close remote device db 3698 if (hci_stack->link_key_db) { 3699 hci_stack->link_key_db->close(); 3700 } 3701 #endif 3702 3703 hci_discard_connections(); 3704 3705 hci_power_control(HCI_POWER_OFF); 3706 3707 #ifdef HAVE_MALLOC 3708 free(hci_stack); 3709 #endif 3710 hci_stack = NULL; 3711 } 3712 3713 #ifdef HAVE_SCO_TRANSPORT 3714 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3715 hci_stack->sco_transport = sco_transport; 3716 sco_transport->register_packet_handler(&packet_handler); 3717 } 3718 #endif 3719 3720 #ifdef ENABLE_CLASSIC 3721 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3722 // validate ranage and set 3723 if (encryption_key_size < 7) return; 3724 if (encryption_key_size > 16) return; 3725 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3726 } 3727 3728 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3729 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3730 hci_stack->gap_security_mode = security_mode; 3731 return ERROR_CODE_SUCCESS; 3732 } else { 3733 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3734 } 3735 } 3736 3737 gap_security_mode_t gap_get_security_mode(void){ 3738 return hci_stack->gap_security_mode; 3739 } 3740 3741 void gap_set_security_level(gap_security_level_t security_level){ 3742 hci_stack->gap_security_level = security_level; 3743 } 3744 3745 gap_security_level_t gap_get_security_level(void){ 3746 if (hci_stack->gap_secure_connections_only_mode){ 3747 return LEVEL_4; 3748 } 3749 return hci_stack->gap_security_level; 3750 } 3751 3752 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3753 hci_stack->gap_minimal_service_security_level = security_level; 3754 } 3755 3756 void gap_set_secure_connections_only_mode(bool enable){ 3757 hci_stack->gap_secure_connections_only_mode = enable; 3758 } 3759 3760 bool gap_get_secure_connections_only_mode(void){ 3761 return hci_stack->gap_secure_connections_only_mode; 3762 } 3763 #endif 3764 3765 #ifdef ENABLE_CLASSIC 3766 void gap_set_class_of_device(uint32_t class_of_device){ 3767 hci_stack->class_of_device = class_of_device; 3768 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 3769 hci_run(); 3770 } 3771 3772 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3773 hci_stack->default_link_policy_settings = default_link_policy_settings; 3774 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3775 hci_run(); 3776 } 3777 3778 void gap_set_allow_role_switch(bool allow_role_switch){ 3779 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3780 } 3781 3782 uint8_t hci_get_allow_role_switch(void){ 3783 return hci_stack->allow_role_switch; 3784 } 3785 3786 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3787 hci_stack->link_supervision_timeout = link_supervision_timeout; 3788 } 3789 3790 void hci_disable_l2cap_timeout_check(void){ 3791 disable_l2cap_timeouts = 1; 3792 } 3793 #endif 3794 3795 #ifndef HAVE_HOST_CONTROLLER_API 3796 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3797 void hci_set_bd_addr(bd_addr_t addr){ 3798 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3799 hci_stack->custom_bd_addr_set = 1; 3800 } 3801 #endif 3802 3803 // State-Module-Driver overview 3804 // state module low-level 3805 // HCI_STATE_OFF off close 3806 // HCI_STATE_INITIALIZING, on open 3807 // HCI_STATE_WORKING, on open 3808 // HCI_STATE_HALTING, on open 3809 // HCI_STATE_SLEEPING, off/sleep close 3810 // HCI_STATE_FALLING_ASLEEP on open 3811 3812 static int hci_power_control_on(void){ 3813 3814 // power on 3815 int err = 0; 3816 if (hci_stack->control && hci_stack->control->on){ 3817 err = (*hci_stack->control->on)(); 3818 } 3819 if (err){ 3820 log_error( "POWER_ON failed"); 3821 hci_emit_hci_open_failed(); 3822 return err; 3823 } 3824 3825 // int chipset driver 3826 if (hci_stack->chipset && hci_stack->chipset->init){ 3827 hci_stack->chipset->init(hci_stack->config); 3828 } 3829 3830 // init transport 3831 if (hci_stack->hci_transport->init){ 3832 hci_stack->hci_transport->init(hci_stack->config); 3833 } 3834 3835 // open transport 3836 err = hci_stack->hci_transport->open(); 3837 if (err){ 3838 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3839 if (hci_stack->control && hci_stack->control->off){ 3840 (*hci_stack->control->off)(); 3841 } 3842 hci_emit_hci_open_failed(); 3843 return err; 3844 } 3845 return 0; 3846 } 3847 3848 static void hci_power_control_off(void){ 3849 3850 log_info("hci_power_control_off"); 3851 3852 // close low-level device 3853 hci_stack->hci_transport->close(); 3854 3855 log_info("hci_power_control_off - hci_transport closed"); 3856 3857 // power off 3858 if (hci_stack->control && hci_stack->control->off){ 3859 (*hci_stack->control->off)(); 3860 } 3861 3862 log_info("hci_power_control_off - control closed"); 3863 3864 hci_stack->state = HCI_STATE_OFF; 3865 } 3866 3867 static void hci_power_control_sleep(void){ 3868 3869 log_info("hci_power_control_sleep"); 3870 3871 #if 0 3872 // don't close serial port during sleep 3873 3874 // close low-level device 3875 hci_stack->hci_transport->close(hci_stack->config); 3876 #endif 3877 3878 // sleep mode 3879 if (hci_stack->control && hci_stack->control->sleep){ 3880 (*hci_stack->control->sleep)(); 3881 } 3882 3883 hci_stack->state = HCI_STATE_SLEEPING; 3884 } 3885 3886 static int hci_power_control_wake(void){ 3887 3888 log_info("hci_power_control_wake"); 3889 3890 // wake on 3891 if (hci_stack->control && hci_stack->control->wake){ 3892 (*hci_stack->control->wake)(); 3893 } 3894 3895 #if 0 3896 // open low-level device 3897 int err = hci_stack->hci_transport->open(hci_stack->config); 3898 if (err){ 3899 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3900 if (hci_stack->control && hci_stack->control->off){ 3901 (*hci_stack->control->off)(); 3902 } 3903 hci_emit_hci_open_failed(); 3904 return err; 3905 } 3906 #endif 3907 3908 return 0; 3909 } 3910 3911 static void hci_power_transition_to_initializing(void){ 3912 // set up state machine 3913 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3914 hci_stack->hci_packet_buffer_reserved = false; 3915 hci_stack->state = HCI_STATE_INITIALIZING; 3916 hci_stack->substate = HCI_INIT_SEND_RESET; 3917 } 3918 3919 // returns error 3920 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3921 int err; 3922 switch (power_mode){ 3923 case HCI_POWER_ON: 3924 err = hci_power_control_on(); 3925 if (err != 0) { 3926 log_error("hci_power_control_on() error %d", err); 3927 return err; 3928 } 3929 hci_power_transition_to_initializing(); 3930 break; 3931 case HCI_POWER_OFF: 3932 // do nothing 3933 break; 3934 case HCI_POWER_SLEEP: 3935 // do nothing (with SLEEP == OFF) 3936 break; 3937 default: 3938 btstack_assert(false); 3939 break; 3940 } 3941 return ERROR_CODE_SUCCESS; 3942 } 3943 3944 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3945 switch (power_mode){ 3946 case HCI_POWER_ON: 3947 // do nothing 3948 break; 3949 case HCI_POWER_OFF: 3950 // no connections yet, just turn it off 3951 hci_power_control_off(); 3952 break; 3953 case HCI_POWER_SLEEP: 3954 // no connections yet, just turn it off 3955 hci_power_control_sleep(); 3956 break; 3957 default: 3958 btstack_assert(false); 3959 break; 3960 } 3961 return ERROR_CODE_SUCCESS; 3962 } 3963 3964 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3965 switch (power_mode){ 3966 case HCI_POWER_ON: 3967 // do nothing 3968 break; 3969 case HCI_POWER_OFF: 3970 // see hci_run 3971 hci_stack->state = HCI_STATE_HALTING; 3972 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3973 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3974 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3975 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3976 btstack_run_loop_add_timer(&hci_stack->timeout); 3977 break; 3978 case HCI_POWER_SLEEP: 3979 // see hci_run 3980 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3981 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3982 break; 3983 default: 3984 btstack_assert(false); 3985 break; 3986 } 3987 return ERROR_CODE_SUCCESS; 3988 } 3989 3990 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3991 switch (power_mode){ 3992 case HCI_POWER_ON: 3993 hci_power_transition_to_initializing(); 3994 break; 3995 case HCI_POWER_OFF: 3996 // do nothing 3997 break; 3998 case HCI_POWER_SLEEP: 3999 // see hci_run 4000 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4001 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4002 break; 4003 default: 4004 btstack_assert(false); 4005 break; 4006 } 4007 return ERROR_CODE_SUCCESS; 4008 } 4009 4010 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4011 switch (power_mode){ 4012 case HCI_POWER_ON: 4013 hci_power_transition_to_initializing(); 4014 break; 4015 case HCI_POWER_OFF: 4016 // see hci_run 4017 hci_stack->state = HCI_STATE_HALTING; 4018 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4019 break; 4020 case HCI_POWER_SLEEP: 4021 // do nothing 4022 break; 4023 default: 4024 btstack_assert(false); 4025 break; 4026 } 4027 return ERROR_CODE_SUCCESS; 4028 } 4029 4030 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4031 int err; 4032 switch (power_mode){ 4033 case HCI_POWER_ON: 4034 err = hci_power_control_wake(); 4035 if (err) return err; 4036 hci_power_transition_to_initializing(); 4037 break; 4038 case HCI_POWER_OFF: 4039 hci_stack->state = HCI_STATE_HALTING; 4040 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4041 break; 4042 case HCI_POWER_SLEEP: 4043 // do nothing 4044 break; 4045 default: 4046 btstack_assert(false); 4047 break; 4048 } 4049 return ERROR_CODE_SUCCESS; 4050 } 4051 4052 int hci_power_control(HCI_POWER_MODE power_mode){ 4053 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4054 int err = 0; 4055 switch (hci_stack->state){ 4056 case HCI_STATE_OFF: 4057 err = hci_power_control_state_off(power_mode); 4058 break; 4059 case HCI_STATE_INITIALIZING: 4060 err = hci_power_control_state_initializing(power_mode); 4061 break; 4062 case HCI_STATE_WORKING: 4063 err = hci_power_control_state_working(power_mode); 4064 break; 4065 case HCI_STATE_HALTING: 4066 err = hci_power_control_state_halting(power_mode); 4067 break; 4068 case HCI_STATE_FALLING_ASLEEP: 4069 err = hci_power_control_state_falling_asleep(power_mode); 4070 break; 4071 case HCI_STATE_SLEEPING: 4072 err = hci_power_control_state_sleeping(power_mode); 4073 break; 4074 default: 4075 btstack_assert(false); 4076 break; 4077 } 4078 if (err != 0){ 4079 return err; 4080 } 4081 4082 // create internal event 4083 hci_emit_state(); 4084 4085 // trigger next/first action 4086 hci_run(); 4087 4088 return 0; 4089 } 4090 4091 4092 static void hci_halting_run(void) { 4093 4094 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4095 4096 hci_connection_t *connection; 4097 4098 switch (hci_stack->substate) { 4099 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4100 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4101 4102 #ifdef ENABLE_BLE 4103 #ifdef ENABLE_LE_CENTRAL 4104 hci_whitelist_free(); 4105 #endif 4106 #endif 4107 // close all open connections 4108 connection = (hci_connection_t *) hci_stack->connections; 4109 if (connection) { 4110 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4111 if (!hci_can_send_command_packet_now()) return; 4112 4113 // check state 4114 if (connection->state == SENT_DISCONNECT) return; 4115 connection->state = SENT_DISCONNECT; 4116 4117 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4118 4119 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4120 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4121 4122 // ... which would be ignored anyway as we shutdown (free) the connection now 4123 hci_shutdown_connection(connection); 4124 4125 // finally, send the disconnect command 4126 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4127 return; 4128 } 4129 4130 btstack_run_loop_remove_timer(&hci_stack->timeout); 4131 4132 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4133 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4134 log_info("HCI_STATE_HALTING: wait 50 ms"); 4135 hci_stack->substate = HCI_HALTING_W4_TIMER; 4136 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4137 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4138 btstack_run_loop_add_timer(&hci_stack->timeout); 4139 break; 4140 } 4141 4142 /* fall through */ 4143 4144 case HCI_HALTING_CLOSE: 4145 // close left over connections (that had not been properly closed before) 4146 hci_discard_connections(); 4147 4148 log_info("HCI_STATE_HALTING, calling off"); 4149 4150 // switch mode 4151 hci_power_control_off(); 4152 4153 log_info("HCI_STATE_HALTING, emitting state"); 4154 hci_emit_state(); 4155 log_info("HCI_STATE_HALTING, done"); 4156 break; 4157 4158 case HCI_HALTING_W4_TIMER: 4159 // keep waiting 4160 4161 break; 4162 default: 4163 break; 4164 } 4165 }; 4166 4167 static void hci_falling_asleep_run(void){ 4168 hci_connection_t * connection; 4169 switch(hci_stack->substate) { 4170 case HCI_FALLING_ASLEEP_DISCONNECT: 4171 log_info("HCI_STATE_FALLING_ASLEEP"); 4172 // close all open connections 4173 connection = (hci_connection_t *) hci_stack->connections; 4174 if (connection){ 4175 4176 // send disconnect 4177 if (!hci_can_send_command_packet_now()) return; 4178 4179 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4180 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4181 4182 // send disconnected event right away - causes higher layer connections to get closed, too. 4183 hci_shutdown_connection(connection); 4184 return; 4185 } 4186 4187 if (hci_classic_supported()){ 4188 // disable page and inquiry scan 4189 if (!hci_can_send_command_packet_now()) return; 4190 4191 log_info("HCI_STATE_HALTING, disabling inq scans"); 4192 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4193 4194 // continue in next sub state 4195 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4196 break; 4197 } 4198 4199 /* fall through */ 4200 4201 case HCI_FALLING_ASLEEP_COMPLETE: 4202 log_info("HCI_STATE_HALTING, calling sleep"); 4203 // switch mode 4204 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4205 hci_emit_state(); 4206 break; 4207 4208 default: 4209 break; 4210 } 4211 } 4212 4213 #ifdef ENABLE_CLASSIC 4214 4215 static void hci_update_scan_enable(void){ 4216 // 2 = page scan, 1 = inq scan 4217 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4218 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 4219 hci_run(); 4220 } 4221 4222 void gap_discoverable_control(uint8_t enable){ 4223 if (enable) enable = 1; // normalize argument 4224 4225 if (hci_stack->discoverable == enable){ 4226 hci_emit_discoverable_enabled(hci_stack->discoverable); 4227 return; 4228 } 4229 4230 hci_stack->discoverable = enable; 4231 hci_update_scan_enable(); 4232 } 4233 4234 void gap_connectable_control(uint8_t enable){ 4235 if (enable) enable = 1; // normalize argument 4236 4237 // don't emit event 4238 if (hci_stack->connectable == enable) return; 4239 4240 hci_stack->connectable = enable; 4241 hci_update_scan_enable(); 4242 } 4243 #endif 4244 4245 void gap_local_bd_addr(bd_addr_t address_buffer){ 4246 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4247 } 4248 4249 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4250 static void hci_host_num_completed_packets(void){ 4251 4252 // create packet manually as arrays are not supported and num_commands should not get reduced 4253 hci_reserve_packet_buffer(); 4254 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4255 4256 uint16_t size = 0; 4257 uint16_t num_handles = 0; 4258 packet[size++] = 0x35; 4259 packet[size++] = 0x0c; 4260 size++; // skip param len 4261 size++; // skip num handles 4262 4263 // add { handle, packets } entries 4264 btstack_linked_item_t * it; 4265 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4266 hci_connection_t * connection = (hci_connection_t *) it; 4267 if (connection->num_packets_completed){ 4268 little_endian_store_16(packet, size, connection->con_handle); 4269 size += 2; 4270 little_endian_store_16(packet, size, connection->num_packets_completed); 4271 size += 2; 4272 // 4273 num_handles++; 4274 connection->num_packets_completed = 0; 4275 } 4276 } 4277 4278 packet[2] = size - 3; 4279 packet[3] = num_handles; 4280 4281 hci_stack->host_completed_packets = 0; 4282 4283 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4284 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4285 4286 // release packet buffer for synchronous transport implementations 4287 if (hci_transport_synchronous()){ 4288 hci_release_packet_buffer(); 4289 hci_emit_transport_packet_sent(); 4290 } 4291 } 4292 #endif 4293 4294 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4295 UNUSED(ds); 4296 hci_stack->substate = HCI_HALTING_CLOSE; 4297 // allow packet handlers to defer final shutdown 4298 hci_emit_state(); 4299 hci_run(); 4300 } 4301 4302 static bool hci_run_acl_fragments(void){ 4303 if (hci_stack->acl_fragmentation_total_size > 0u) { 4304 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4305 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4306 if (connection) { 4307 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4308 hci_send_acl_packet_fragments(connection); 4309 return true; 4310 } 4311 } else { 4312 // connection gone -> discard further fragments 4313 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4314 hci_stack->acl_fragmentation_total_size = 0; 4315 hci_stack->acl_fragmentation_pos = 0; 4316 } 4317 } 4318 return false; 4319 } 4320 4321 #ifdef ENABLE_CLASSIC 4322 static bool hci_run_general_gap_classic(void){ 4323 4324 // assert stack is working and classic is active 4325 if (hci_classic_supported() == false) return false; 4326 if (hci_stack->state != HCI_STATE_WORKING) return false; 4327 4328 // decline incoming connections 4329 if (hci_stack->decline_reason){ 4330 uint8_t reason = hci_stack->decline_reason; 4331 hci_stack->decline_reason = 0; 4332 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4333 return true; 4334 } 4335 4336 if (hci_stack->gap_tasks_classic != 0){ 4337 hci_run_gap_tasks_classic(); 4338 return true; 4339 } 4340 4341 // start/stop inquiry 4342 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4343 uint8_t duration = hci_stack->inquiry_state; 4344 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4345 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4346 return true; 4347 } 4348 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4349 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4350 hci_send_cmd(&hci_inquiry_cancel); 4351 return true; 4352 } 4353 // remote name request 4354 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4355 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4356 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4357 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4358 return true; 4359 } 4360 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4361 // Local OOB data 4362 if (hci_stack->classic_read_local_oob_data){ 4363 hci_stack->classic_read_local_oob_data = false; 4364 if (hci_stack->local_supported_commands[1] & 0x10u){ 4365 hci_send_cmd(&hci_read_local_extended_oob_data); 4366 } else { 4367 hci_send_cmd(&hci_read_local_oob_data); 4368 } 4369 } 4370 #endif 4371 // pairing 4372 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4373 uint8_t state = hci_stack->gap_pairing_state; 4374 uint8_t pin_code[16]; 4375 switch (state){ 4376 case GAP_PAIRING_STATE_SEND_PIN: 4377 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4378 memset(pin_code, 0, 16); 4379 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4380 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4381 break; 4382 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4383 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4384 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4385 break; 4386 case GAP_PAIRING_STATE_SEND_PASSKEY: 4387 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4388 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4389 break; 4390 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4391 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4392 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4393 break; 4394 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4395 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4396 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4397 break; 4398 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4399 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4400 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4401 break; 4402 default: 4403 break; 4404 } 4405 return true; 4406 } 4407 return false; 4408 } 4409 #endif 4410 4411 #ifdef ENABLE_BLE 4412 static bool hci_run_general_gap_le(void){ 4413 4414 // Phase 1: collect what to stop 4415 4416 bool scanning_stop = false; 4417 bool connecting_stop = false; 4418 bool advertising_stop = false; 4419 4420 #ifndef ENABLE_LE_CENTRAL 4421 UNUSED(scanning_stop); 4422 UNUSED(connecting_stop); 4423 #endif 4424 #ifndef ENABLE_LE_PERIPHERAL 4425 UNUSED(advertising_stop); 4426 #endif 4427 4428 // check if own address changes 4429 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4430 4431 // check if whitelist needs modification 4432 bool whitelist_modification_pending = false; 4433 btstack_linked_list_iterator_t lit; 4434 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4435 while (btstack_linked_list_iterator_has_next(&lit)){ 4436 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4437 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4438 whitelist_modification_pending = true; 4439 break; 4440 } 4441 } 4442 // check if resolving list needs modification 4443 bool resolving_list_modification_pending = false; 4444 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4445 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4446 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4447 resolving_list_modification_pending = true; 4448 } 4449 #endif 4450 4451 #ifdef ENABLE_LE_CENTRAL 4452 // scanning control 4453 if (hci_stack->le_scanning_active) { 4454 // stop if: 4455 // - parameter change required 4456 // - it's disabled 4457 // - whitelist change required but used for scanning 4458 // - resolving list modified 4459 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4460 if ((hci_stack->le_scanning_param_update) || 4461 !hci_stack->le_scanning_enabled || 4462 scanning_uses_whitelist || 4463 resolving_list_modification_pending){ 4464 4465 scanning_stop = true; 4466 } 4467 } 4468 #endif 4469 4470 #ifdef ENABLE_LE_CENTRAL 4471 // connecting control 4472 bool connecting_with_whitelist; 4473 switch (hci_stack->le_connecting_state){ 4474 case LE_CONNECTING_DIRECT: 4475 case LE_CONNECTING_WHITELIST: 4476 // stop connecting if: 4477 // - connecting uses white and whitelist modification pending 4478 // - if it got disabled 4479 // - resolving list modified 4480 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4481 if ((connecting_with_whitelist && whitelist_modification_pending) || 4482 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4483 resolving_list_modification_pending) { 4484 4485 connecting_stop = true; 4486 } 4487 break; 4488 default: 4489 break; 4490 } 4491 #endif 4492 4493 #ifdef ENABLE_LE_PERIPHERAL 4494 // le advertisement control 4495 if (hci_stack->le_advertisements_active){ 4496 // stop if: 4497 // - parameter change required 4498 // - random address used in advertising and changes 4499 // - it's disabled 4500 // - whitelist change required but used for advertisement filter policy 4501 // - resolving list modified 4502 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4503 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4504 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4505 if (advertising_change || 4506 (advertising_uses_random_address && random_address_change) || 4507 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4508 (advertising_uses_whitelist && whitelist_modification_pending) || 4509 resolving_list_modification_pending) { 4510 4511 advertising_stop = true; 4512 } 4513 } 4514 #endif 4515 4516 4517 // Phase 2: stop everything that should be off during modifications 4518 4519 #ifdef ENABLE_LE_CENTRAL 4520 if (scanning_stop){ 4521 hci_stack->le_scanning_active = false; 4522 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4523 return true; 4524 } 4525 #endif 4526 4527 #ifdef ENABLE_LE_CENTRAL 4528 if (connecting_stop){ 4529 hci_send_cmd(&hci_le_create_connection_cancel); 4530 return true; 4531 } 4532 #endif 4533 4534 #ifdef ENABLE_LE_PERIPHERAL 4535 if (advertising_stop){ 4536 hci_stack->le_advertisements_active = false; 4537 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4538 return true; 4539 } 4540 #endif 4541 4542 // Phase 3: modify 4543 4544 if (random_address_change){ 4545 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4546 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4547 return true; 4548 } 4549 4550 #ifdef ENABLE_LE_CENTRAL 4551 if (hci_stack->le_scanning_param_update){ 4552 hci_stack->le_scanning_param_update = false; 4553 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4554 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4555 return true; 4556 } 4557 #endif 4558 4559 #ifdef ENABLE_LE_PERIPHERAL 4560 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4561 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4562 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4563 hci_send_cmd(&hci_le_set_advertising_parameters, 4564 hci_stack->le_advertisements_interval_min, 4565 hci_stack->le_advertisements_interval_max, 4566 hci_stack->le_advertisements_type, 4567 hci_stack->le_advertisements_own_addr_type, 4568 hci_stack->le_advertisements_direct_address_type, 4569 hci_stack->le_advertisements_direct_address, 4570 hci_stack->le_advertisements_channel_map, 4571 hci_stack->le_advertisements_filter_policy); 4572 return true; 4573 } 4574 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4575 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4576 uint8_t adv_data_clean[31]; 4577 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4578 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4579 hci_stack->le_advertisements_data_len); 4580 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4581 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4582 return true; 4583 } 4584 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4585 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4586 uint8_t scan_data_clean[31]; 4587 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4588 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4589 hci_stack->le_scan_response_data_len); 4590 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4591 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4592 return true; 4593 } 4594 #endif 4595 4596 4597 #ifdef ENABLE_LE_CENTRAL 4598 // if connect with whitelist was active and is not cancelled yet, wait until next time 4599 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4600 #endif 4601 4602 // LE Whitelist Management 4603 if (whitelist_modification_pending){ 4604 // add/remove entries 4605 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4606 while (btstack_linked_list_iterator_has_next(&lit)){ 4607 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4608 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4609 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4610 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4611 return true; 4612 } 4613 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4614 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4615 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4616 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4617 return true; 4618 } 4619 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4620 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4621 btstack_memory_whitelist_entry_free(entry); 4622 } 4623 } 4624 } 4625 4626 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4627 // LE Resolving List Management 4628 if (resolving_list_supported) { 4629 uint16_t i; 4630 switch (hci_stack->le_resolving_list_state) { 4631 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4632 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4633 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4634 return true; 4635 case LE_RESOLVING_LIST_READ_SIZE: 4636 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4637 hci_send_cmd(&hci_le_read_resolving_list_size); 4638 return true; 4639 case LE_RESOLVING_LIST_SEND_CLEAR: 4640 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4641 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4642 sizeof(hci_stack->le_resolving_list_add_entries)); 4643 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4644 sizeof(hci_stack->le_resolving_list_remove_entries)); 4645 hci_send_cmd(&hci_le_clear_resolving_list); 4646 return true; 4647 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4648 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4649 uint8_t offset = i >> 3; 4650 uint8_t mask = 1 << (i & 7); 4651 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4652 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4653 bd_addr_t peer_identity_addreses; 4654 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4655 sm_key_t peer_irk; 4656 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4657 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4658 4659 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4660 // trigger whitelist entry 'update' (work around for controller bug) 4661 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4662 while (btstack_linked_list_iterator_has_next(&lit)) { 4663 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4664 if (entry->address_type != peer_identity_addr_type) continue; 4665 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4666 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4667 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4668 } 4669 #endif 4670 4671 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4672 peer_identity_addreses); 4673 return true; 4674 } 4675 4676 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4677 4678 /* fall through */ 4679 4680 case LE_RESOLVING_LIST_ADD_ENTRIES: 4681 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4682 uint8_t offset = i >> 3; 4683 uint8_t mask = 1 << (i & 7); 4684 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4685 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4686 bd_addr_t peer_identity_addreses; 4687 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4688 sm_key_t peer_irk; 4689 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4690 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4691 const uint8_t *local_irk = gap_get_persistent_irk(); 4692 // command uses format specifier 'P' that stores 16-byte value without flip 4693 uint8_t local_irk_flipped[16]; 4694 uint8_t peer_irk_flipped[16]; 4695 reverse_128(local_irk, local_irk_flipped); 4696 reverse_128(peer_irk, peer_irk_flipped); 4697 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4698 peer_irk_flipped, local_irk_flipped); 4699 return true; 4700 } 4701 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4702 break; 4703 4704 default: 4705 break; 4706 } 4707 } 4708 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4709 #endif 4710 4711 // post-pone all actions until stack is fully working 4712 if (hci_stack->state != HCI_STATE_WORKING) return false; 4713 4714 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4715 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4716 4717 // Phase 4: restore state 4718 4719 #ifdef ENABLE_LE_CENTRAL 4720 // re-start scanning 4721 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4722 hci_stack->le_scanning_active = true; 4723 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4724 return true; 4725 } 4726 #endif 4727 4728 #ifdef ENABLE_LE_CENTRAL 4729 // re-start connecting 4730 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4731 bd_addr_t null_addr; 4732 memset(null_addr, 0, 6); 4733 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4734 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4735 hci_send_cmd(&hci_le_create_connection, 4736 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4737 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4738 1, // use whitelist 4739 0, // peer address type 4740 null_addr, // peer bd addr 4741 hci_stack->le_connection_own_addr_type, // our addr type: 4742 hci_stack->le_connection_interval_min, // conn interval min 4743 hci_stack->le_connection_interval_max, // conn interval max 4744 hci_stack->le_connection_latency, // conn latency 4745 hci_stack->le_supervision_timeout, // conn latency 4746 hci_stack->le_minimum_ce_length, // min ce length 4747 hci_stack->le_maximum_ce_length // max ce length 4748 ); 4749 return true; 4750 } 4751 #endif 4752 4753 #ifdef ENABLE_LE_PERIPHERAL 4754 // re-start advertising 4755 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4756 // check if advertisements should be enabled given 4757 hci_stack->le_advertisements_active = true; 4758 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4759 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4760 return true; 4761 } 4762 #endif 4763 4764 return false; 4765 } 4766 #endif 4767 4768 static bool hci_run_general_pending_commands(void){ 4769 btstack_linked_item_t * it; 4770 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4771 hci_connection_t * connection = (hci_connection_t *) it; 4772 4773 switch(connection->state){ 4774 case SEND_CREATE_CONNECTION: 4775 switch(connection->address_type){ 4776 #ifdef ENABLE_CLASSIC 4777 case BD_ADDR_TYPE_ACL: 4778 log_info("sending hci_create_connection"); 4779 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4780 break; 4781 #endif 4782 default: 4783 #ifdef ENABLE_BLE 4784 #ifdef ENABLE_LE_CENTRAL 4785 log_info("sending hci_le_create_connection"); 4786 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4787 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4788 hci_send_cmd(&hci_le_create_connection, 4789 hci_stack->le_connection_scan_interval, // conn scan interval 4790 hci_stack->le_connection_scan_window, // conn scan windows 4791 0, // don't use whitelist 4792 connection->address_type, // peer address type 4793 connection->address, // peer bd addr 4794 hci_stack->le_connection_own_addr_type, // our addr type: 4795 hci_stack->le_connection_interval_min, // conn interval min 4796 hci_stack->le_connection_interval_max, // conn interval max 4797 hci_stack->le_connection_latency, // conn latency 4798 hci_stack->le_supervision_timeout, // conn latency 4799 hci_stack->le_minimum_ce_length, // min ce length 4800 hci_stack->le_maximum_ce_length // max ce length 4801 ); 4802 connection->state = SENT_CREATE_CONNECTION; 4803 #endif 4804 #endif 4805 break; 4806 } 4807 return true; 4808 4809 #ifdef ENABLE_CLASSIC 4810 case RECEIVED_CONNECTION_REQUEST: 4811 connection->role = HCI_ROLE_SLAVE; 4812 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4813 log_info("sending hci_accept_connection_request"); 4814 connection->state = ACCEPTED_CONNECTION_REQUEST; 4815 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4816 return true; 4817 } 4818 break; 4819 #endif 4820 4821 #ifdef ENABLE_BLE 4822 #ifdef ENABLE_LE_CENTRAL 4823 case SEND_CANCEL_CONNECTION: 4824 connection->state = SENT_CANCEL_CONNECTION; 4825 hci_send_cmd(&hci_le_create_connection_cancel); 4826 return true; 4827 #endif 4828 #endif 4829 case SEND_DISCONNECT: 4830 connection->state = SENT_DISCONNECT; 4831 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4832 return true; 4833 4834 default: 4835 break; 4836 } 4837 4838 // no further commands if connection is about to get shut down 4839 if (connection->state == SENT_DISCONNECT) continue; 4840 4841 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4842 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4843 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4844 return true; 4845 } 4846 4847 #ifdef ENABLE_CLASSIC 4848 4849 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4850 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4851 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4852 return true; 4853 } 4854 4855 // Handling link key request requires remote supported features 4856 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4857 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4858 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4859 4860 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4861 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4862 if (have_link_key && security_level_sufficient){ 4863 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4864 } else { 4865 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4866 } 4867 return true; 4868 } 4869 4870 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4871 log_info("denying to pin request"); 4872 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4873 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4874 return true; 4875 } 4876 4877 // security assessment requires remote features 4878 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4879 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4880 hci_ssp_assess_security_on_io_cap_request(connection); 4881 // 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 4882 } 4883 4884 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4885 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4886 // set authentication requirements: 4887 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4888 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4889 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4890 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4891 authreq |= 1; 4892 } 4893 bool bonding = hci_stack->bondable; 4894 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4895 // if we have received IO Cap Response, we're in responder role 4896 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4897 if (bonding && !remote_bonding){ 4898 log_info("Remote not bonding, dropping local flag"); 4899 bonding = false; 4900 } 4901 } 4902 if (bonding){ 4903 if (connection->bonding_flags & BONDING_DEDICATED){ 4904 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4905 } else { 4906 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4907 } 4908 } 4909 uint8_t have_oob_data = 0; 4910 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4911 if (connection->classic_oob_c_192 != NULL){ 4912 have_oob_data |= 1; 4913 } 4914 if (connection->classic_oob_c_256 != NULL){ 4915 have_oob_data |= 2; 4916 } 4917 #endif 4918 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4919 return true; 4920 } 4921 4922 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4923 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4924 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4925 return true; 4926 } 4927 4928 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4929 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4930 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4931 const uint8_t zero[16] = { 0 }; 4932 const uint8_t * r_192 = zero; 4933 const uint8_t * c_192 = zero; 4934 const uint8_t * r_256 = zero; 4935 const uint8_t * c_256 = zero; 4936 // verify P-256 OOB 4937 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4938 c_256 = connection->classic_oob_c_256; 4939 if (connection->classic_oob_r_256 != NULL) { 4940 r_256 = connection->classic_oob_r_256; 4941 } 4942 } 4943 // verify P-192 OOB 4944 if ((connection->classic_oob_c_192 != NULL)) { 4945 c_192 = connection->classic_oob_c_192; 4946 if (connection->classic_oob_r_192 != NULL) { 4947 r_192 = connection->classic_oob_r_192; 4948 } 4949 } 4950 4951 // assess security 4952 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4953 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4954 if (need_level_4 && !can_reach_level_4){ 4955 log_info("Level 4 required, but not possible -> abort"); 4956 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4957 // send oob negative reply 4958 c_256 = NULL; 4959 c_192 = NULL; 4960 } 4961 4962 // Reply 4963 if (c_256 != zero) { 4964 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4965 } else if (c_192 != zero){ 4966 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4967 } else { 4968 hci_stack->classic_oob_con_handle = connection->con_handle; 4969 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4970 } 4971 return true; 4972 } 4973 #endif 4974 4975 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4976 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4977 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4978 return true; 4979 } 4980 4981 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4982 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4983 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4984 return true; 4985 } 4986 4987 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4988 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4989 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4990 return true; 4991 } 4992 4993 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4994 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4995 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4996 connection->state = SENT_DISCONNECT; 4997 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4998 return true; 4999 } 5000 5001 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 5002 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 5003 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 5004 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 5005 return true; 5006 } 5007 5008 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 5009 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 5010 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 5011 return true; 5012 } 5013 5014 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5015 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5016 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5017 return true; 5018 } 5019 5020 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5021 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5022 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5023 return true; 5024 } 5025 5026 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5027 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5028 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5029 return true; 5030 } 5031 5032 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5033 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5034 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5035 return true; 5036 } 5037 #endif 5038 5039 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5040 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5041 #ifdef ENABLE_CLASSIC 5042 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5043 #endif 5044 if (connection->state != SENT_DISCONNECT){ 5045 connection->state = SENT_DISCONNECT; 5046 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5047 return true; 5048 } 5049 } 5050 5051 #ifdef ENABLE_CLASSIC 5052 uint16_t sniff_min_interval; 5053 switch (connection->sniff_min_interval){ 5054 case 0: 5055 break; 5056 case 0xffff: 5057 connection->sniff_min_interval = 0; 5058 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5059 return true; 5060 default: 5061 sniff_min_interval = connection->sniff_min_interval; 5062 connection->sniff_min_interval = 0; 5063 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5064 return true; 5065 } 5066 5067 if (connection->sniff_subrating_max_latency != 0xffff){ 5068 uint16_t max_latency = connection->sniff_subrating_max_latency; 5069 connection->sniff_subrating_max_latency = 0; 5070 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5071 return true; 5072 } 5073 5074 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5075 uint8_t service_type = (uint8_t) connection->qos_service_type; 5076 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5077 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); 5078 return true; 5079 } 5080 5081 if (connection->request_role != HCI_ROLE_INVALID){ 5082 hci_role_t role = connection->request_role; 5083 connection->request_role = HCI_ROLE_INVALID; 5084 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5085 return true; 5086 } 5087 #endif 5088 5089 #ifdef ENABLE_BLE 5090 switch (connection->le_con_parameter_update_state){ 5091 // response to L2CAP CON PARAMETER UPDATE REQUEST 5092 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5093 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5094 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5095 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5096 0x0000, 0xffff); 5097 return true; 5098 case CON_PARAMETER_UPDATE_REPLY: 5099 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5100 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5101 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5102 0x0000, 0xffff); 5103 return true; 5104 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5105 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5106 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5107 return true; 5108 default: 5109 break; 5110 } 5111 if (connection->le_phy_update_all_phys != 0xffu){ 5112 uint8_t all_phys = connection->le_phy_update_all_phys; 5113 connection->le_phy_update_all_phys = 0xff; 5114 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); 5115 return true; 5116 } 5117 #endif 5118 } 5119 return false; 5120 } 5121 5122 static void hci_run(void){ 5123 5124 // stack state sub statemachines 5125 // halting needs to be called even if we cannot send command packet now 5126 switch (hci_stack->state) { 5127 case HCI_STATE_INITIALIZING: 5128 hci_initializing_run(); 5129 break; 5130 case HCI_STATE_HALTING: 5131 hci_halting_run(); 5132 break; 5133 case HCI_STATE_FALLING_ASLEEP: 5134 hci_falling_asleep_run(); 5135 break; 5136 default: 5137 break; 5138 } 5139 5140 bool done; 5141 5142 // send continuation fragments first, as they block the prepared packet buffer 5143 done = hci_run_acl_fragments(); 5144 if (done) return; 5145 5146 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5147 // send host num completed packets next as they don't require num_cmd_packets > 0 5148 if (!hci_can_send_comand_packet_transport()) return; 5149 if (hci_stack->host_completed_packets){ 5150 hci_host_num_completed_packets(); 5151 return; 5152 } 5153 #endif 5154 5155 if (!hci_can_send_command_packet_now()) return; 5156 5157 // global/non-connection oriented commands 5158 5159 5160 #ifdef ENABLE_CLASSIC 5161 // general gap classic 5162 done = hci_run_general_gap_classic(); 5163 if (done) return; 5164 #endif 5165 5166 #ifdef ENABLE_BLE 5167 // general gap le 5168 done = hci_run_general_gap_le(); 5169 if (done) return; 5170 #endif 5171 5172 // send pending HCI commands 5173 hci_run_general_pending_commands(); 5174 } 5175 5176 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5177 // house-keeping 5178 5179 #ifdef ENABLE_CLASSIC 5180 bd_addr_t addr; 5181 hci_connection_t * conn; 5182 #endif 5183 #ifdef ENABLE_LE_CENTRAL 5184 uint8_t initiator_filter_policy; 5185 #endif 5186 5187 uint16_t opcode = little_endian_read_16(packet, 0); 5188 switch (opcode) { 5189 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5190 hci_stack->loopback_mode = packet[3]; 5191 break; 5192 5193 #ifdef ENABLE_CLASSIC 5194 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5195 reverse_bd_addr(&packet[3], addr); 5196 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5197 5198 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5199 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5200 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5201 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5202 } 5203 5204 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5205 if (!conn) { 5206 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5207 if (!conn) { 5208 // notify client that alloc failed 5209 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5210 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5211 } 5212 conn->state = SEND_CREATE_CONNECTION; 5213 conn->role = HCI_ROLE_MASTER; 5214 } 5215 5216 conn->con_handle = HCI_CON_HANDLE_INVALID; 5217 conn->role = HCI_ROLE_INVALID; 5218 5219 log_info("conn state %u", conn->state); 5220 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5221 switch (conn->state) { 5222 // if connection active exists 5223 case OPEN: 5224 // and OPEN, emit connection complete command 5225 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5226 // packet not sent to controller 5227 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5228 case RECEIVED_DISCONNECTION_COMPLETE: 5229 // create connection triggered in disconnect complete event, let's do it now 5230 break; 5231 case SEND_CREATE_CONNECTION: 5232 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5233 break; 5234 default: 5235 // otherwise, just ignore as it is already in the open process 5236 // packet not sent to controller 5237 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5238 } 5239 conn->state = SENT_CREATE_CONNECTION; 5240 5241 // track outgoing connection 5242 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5243 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5244 break; 5245 5246 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5247 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5248 // setup_synchronous_connection? Voice setting at offset 22 5249 // TODO: compare to current setting if sco connection already active 5250 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5251 break; 5252 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5253 // accept_synchronous_connection? Voice setting at offset 18 5254 // TODO: compare to current setting if sco connection already active 5255 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5256 // track outgoing connection 5257 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5258 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5259 break; 5260 #endif 5261 #endif 5262 5263 #ifdef ENABLE_BLE 5264 #ifdef ENABLE_LE_CENTRAL 5265 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5266 // white list used? 5267 initiator_filter_policy = packet[7]; 5268 switch (initiator_filter_policy) { 5269 case 0: 5270 // whitelist not used 5271 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5272 break; 5273 case 1: 5274 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5275 break; 5276 default: 5277 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5278 break; 5279 } 5280 // track outgoing connection 5281 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5282 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5283 break; 5284 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5285 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5286 break; 5287 #endif 5288 #endif 5289 default: 5290 break; 5291 } 5292 5293 hci_stack->num_cmd_packets--; 5294 5295 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5296 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5297 if (err != 0){ 5298 return ERROR_CODE_HARDWARE_FAILURE; 5299 } 5300 return ERROR_CODE_SUCCESS; 5301 } 5302 5303 // disconnect because of security block 5304 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5305 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5306 if (!connection) return; 5307 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5308 } 5309 5310 5311 // Configure Secure Simple Pairing 5312 5313 #ifdef ENABLE_CLASSIC 5314 5315 // enable will enable SSP during init 5316 void gap_ssp_set_enable(int enable){ 5317 hci_stack->ssp_enable = enable; 5318 } 5319 5320 static int hci_local_ssp_activated(void){ 5321 return gap_ssp_supported() && hci_stack->ssp_enable; 5322 } 5323 5324 // if set, BTstack will respond to io capability request using authentication requirement 5325 void gap_ssp_set_io_capability(int io_capability){ 5326 hci_stack->ssp_io_capability = io_capability; 5327 } 5328 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5329 hci_stack->ssp_authentication_requirement = authentication_requirement; 5330 } 5331 5332 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5333 void gap_ssp_set_auto_accept(int auto_accept){ 5334 hci_stack->ssp_auto_accept = auto_accept; 5335 } 5336 5337 void gap_secure_connections_enable(bool enable){ 5338 hci_stack->secure_connections_enable = enable; 5339 } 5340 5341 #endif 5342 5343 // va_list part of hci_send_cmd 5344 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5345 if (!hci_can_send_command_packet_now()){ 5346 log_error("hci_send_cmd called but cannot send packet now"); 5347 return ERROR_CODE_COMMAND_DISALLOWED; 5348 } 5349 5350 // for HCI INITIALIZATION 5351 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5352 hci_stack->last_cmd_opcode = cmd->opcode; 5353 5354 hci_reserve_packet_buffer(); 5355 uint8_t * packet = hci_stack->hci_packet_buffer; 5356 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5357 uint8_t status = hci_send_cmd_packet(packet, size); 5358 5359 // release packet buffer on error or for synchronous transport implementations 5360 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5361 hci_release_packet_buffer(); 5362 hci_emit_transport_packet_sent(); 5363 } 5364 5365 return status; 5366 } 5367 5368 /** 5369 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5370 */ 5371 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5372 va_list argptr; 5373 va_start(argptr, cmd); 5374 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5375 va_end(argptr); 5376 return status; 5377 } 5378 5379 // Create various non-HCI events. 5380 // TODO: generalize, use table similar to hci_create_command 5381 5382 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5383 // dump packet 5384 if (dump) { 5385 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5386 } 5387 5388 // dispatch to all event handlers 5389 btstack_linked_list_iterator_t it; 5390 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5391 while (btstack_linked_list_iterator_has_next(&it)){ 5392 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5393 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5394 } 5395 } 5396 5397 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5398 if (!hci_stack->acl_packet_handler) return; 5399 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5400 } 5401 5402 #ifdef ENABLE_CLASSIC 5403 static void hci_notify_if_sco_can_send_now(void){ 5404 // notify SCO sender if waiting 5405 if (!hci_stack->sco_waiting_for_can_send_now) return; 5406 if (hci_can_send_sco_packet_now()){ 5407 hci_stack->sco_waiting_for_can_send_now = 0; 5408 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5409 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5410 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5411 } 5412 } 5413 5414 // parsing end emitting has been merged to reduce code size 5415 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5416 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5417 5418 uint8_t * eir_data; 5419 ad_context_t context; 5420 const uint8_t * name; 5421 uint8_t name_len; 5422 5423 if (size < 3) return; 5424 5425 int event_type = hci_event_packet_get_type(packet); 5426 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5427 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5428 5429 switch (event_type){ 5430 case HCI_EVENT_INQUIRY_RESULT: 5431 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5432 if (size != (3 + (num_responses * 14))) return; 5433 break; 5434 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5435 if (size != 257) return; 5436 if (num_responses != 1) return; 5437 break; 5438 default: 5439 return; 5440 } 5441 5442 // event[1] is set at the end 5443 int i; 5444 for (i=0; i<num_responses;i++){ 5445 memset(event, 0, sizeof(event)); 5446 event[0] = GAP_EVENT_INQUIRY_RESULT; 5447 uint8_t event_size = 27; // if name is not set by EIR 5448 5449 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5450 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5451 (void)memcpy(&event[9], 5452 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5453 3); // class of device 5454 (void)memcpy(&event[12], 5455 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5456 2); // clock offset 5457 5458 switch (event_type){ 5459 case HCI_EVENT_INQUIRY_RESULT: 5460 // 14,15,16,17 = 0, size 18 5461 break; 5462 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5463 event[14] = 1; 5464 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5465 // 16,17 = 0, size 18 5466 break; 5467 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5468 event[14] = 1; 5469 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5470 // EIR packets only contain a single inquiry response 5471 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5472 name = NULL; 5473 // Iterate over EIR data 5474 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5475 uint8_t data_type = ad_iterator_get_data_type(&context); 5476 uint8_t data_size = ad_iterator_get_data_len(&context); 5477 const uint8_t * data = ad_iterator_get_data(&context); 5478 // Prefer Complete Local Name over Shortened Local Name 5479 switch (data_type){ 5480 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5481 if (name) continue; 5482 /* fall through */ 5483 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5484 name = data; 5485 name_len = data_size; 5486 break; 5487 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5488 if (data_size != 8) break; 5489 event[16] = 1; 5490 memcpy(&event[17], data, 8); 5491 break; 5492 default: 5493 break; 5494 } 5495 } 5496 if (name){ 5497 event[25] = 1; 5498 // truncate name if needed 5499 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5500 event[26] = len; 5501 (void)memcpy(&event[27], name, len); 5502 event_size += len; 5503 } 5504 break; 5505 default: 5506 return; 5507 } 5508 event[1] = event_size - 2; 5509 hci_emit_event(event, event_size, 1); 5510 } 5511 } 5512 #endif 5513 5514 void hci_emit_state(void){ 5515 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5516 uint8_t event[3]; 5517 event[0] = BTSTACK_EVENT_STATE; 5518 event[1] = sizeof(event) - 2u; 5519 event[2] = hci_stack->state; 5520 hci_emit_event(event, sizeof(event), 1); 5521 } 5522 5523 #ifdef ENABLE_CLASSIC 5524 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5525 uint8_t event[13]; 5526 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5527 event[1] = sizeof(event) - 2; 5528 event[2] = status; 5529 little_endian_store_16(event, 3, con_handle); 5530 reverse_bd_addr(address, &event[5]); 5531 event[11] = 1; // ACL connection 5532 event[12] = 0; // encryption disabled 5533 hci_emit_event(event, sizeof(event), 1); 5534 } 5535 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5536 if (disable_l2cap_timeouts) return; 5537 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5538 uint8_t event[4]; 5539 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5540 event[1] = sizeof(event) - 2; 5541 little_endian_store_16(event, 2, conn->con_handle); 5542 hci_emit_event(event, sizeof(event), 1); 5543 } 5544 #endif 5545 5546 #ifdef ENABLE_BLE 5547 #ifdef ENABLE_LE_CENTRAL 5548 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){ 5549 uint8_t event[21]; 5550 event[0] = HCI_EVENT_LE_META; 5551 event[1] = sizeof(event) - 2u; 5552 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5553 event[3] = status; 5554 little_endian_store_16(event, 4, con_handle); 5555 event[6] = 0; // TODO: role 5556 event[7] = address_type; 5557 reverse_bd_addr(address, &event[8]); 5558 little_endian_store_16(event, 14, 0); // interval 5559 little_endian_store_16(event, 16, 0); // latency 5560 little_endian_store_16(event, 18, 0); // supervision timeout 5561 event[20] = 0; // master clock accuracy 5562 hci_emit_event(event, sizeof(event), 1); 5563 } 5564 #endif 5565 #endif 5566 5567 static void hci_emit_transport_packet_sent(void){ 5568 // notify upper stack that it might be possible to send again 5569 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5570 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5571 } 5572 5573 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5574 uint8_t event[6]; 5575 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5576 event[1] = sizeof(event) - 2u; 5577 event[2] = 0; // status = OK 5578 little_endian_store_16(event, 3, con_handle); 5579 event[5] = reason; 5580 hci_emit_event(event, sizeof(event), 1); 5581 } 5582 5583 static void hci_emit_nr_connections_changed(void){ 5584 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5585 uint8_t event[3]; 5586 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5587 event[1] = sizeof(event) - 2u; 5588 event[2] = nr_hci_connections(); 5589 hci_emit_event(event, sizeof(event), 1); 5590 } 5591 5592 static void hci_emit_hci_open_failed(void){ 5593 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5594 uint8_t event[2]; 5595 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5596 event[1] = sizeof(event) - 2u; 5597 hci_emit_event(event, sizeof(event), 1); 5598 } 5599 5600 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5601 log_info("hci_emit_dedicated_bonding_result %u ", status); 5602 uint8_t event[9]; 5603 int pos = 0; 5604 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5605 event[pos++] = sizeof(event) - 2u; 5606 event[pos++] = status; 5607 reverse_bd_addr(address, &event[pos]); 5608 hci_emit_event(event, sizeof(event), 1); 5609 } 5610 5611 5612 #ifdef ENABLE_CLASSIC 5613 5614 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5615 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5616 uint8_t event[5]; 5617 int pos = 0; 5618 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5619 event[pos++] = sizeof(event) - 2; 5620 little_endian_store_16(event, 2, con_handle); 5621 pos += 2; 5622 event[pos++] = level; 5623 hci_emit_event(event, sizeof(event), 1); 5624 } 5625 5626 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5627 if (!connection) return LEVEL_0; 5628 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5629 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5630 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5631 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5632 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5633 // LEVEL 4 always requires 128 bit encrytion key size 5634 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5635 security_level = LEVEL_3; 5636 } 5637 return security_level; 5638 } 5639 5640 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5641 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5642 uint8_t event[3]; 5643 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5644 event[1] = sizeof(event) - 2; 5645 event[2] = enabled; 5646 hci_emit_event(event, sizeof(event), 1); 5647 } 5648 5649 // query if remote side supports eSCO 5650 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5652 if (!connection) return false; 5653 return (connection->remote_supported_features[0] & 1) != 0; 5654 } 5655 5656 static bool hci_ssp_supported(hci_connection_t * connection){ 5657 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5658 return (connection->bonding_flags & mask) == mask; 5659 } 5660 5661 // query if remote side supports SSP 5662 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5663 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5664 if (!connection) return false; 5665 return hci_ssp_supported(connection) ? 1 : 0; 5666 } 5667 5668 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5669 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5670 } 5671 5672 /** 5673 * Check if remote supported features query has completed 5674 */ 5675 bool hci_remote_features_available(hci_con_handle_t handle){ 5676 hci_connection_t * connection = hci_connection_for_handle(handle); 5677 if (!connection) return false; 5678 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5679 } 5680 5681 /** 5682 * Trigger remote supported features query 5683 */ 5684 5685 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5686 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5687 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5688 } 5689 } 5690 5691 void hci_remote_features_query(hci_con_handle_t con_handle){ 5692 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5693 if (!connection) return; 5694 hci_trigger_remote_features_for_connection(connection); 5695 hci_run(); 5696 } 5697 5698 // GAP API 5699 /** 5700 * @bbrief enable/disable bonding. default is enabled 5701 * @praram enabled 5702 */ 5703 void gap_set_bondable_mode(int enable){ 5704 hci_stack->bondable = enable ? 1 : 0; 5705 } 5706 /** 5707 * @brief Get bondable mode. 5708 * @return 1 if bondable 5709 */ 5710 int gap_get_bondable_mode(void){ 5711 return hci_stack->bondable; 5712 } 5713 5714 /** 5715 * @brief map link keys to security levels 5716 */ 5717 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5718 switch (link_key_type){ 5719 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5720 return LEVEL_4; 5721 case COMBINATION_KEY: 5722 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5723 return LEVEL_3; 5724 default: 5725 return LEVEL_2; 5726 } 5727 } 5728 5729 /** 5730 * @brief map link keys to secure connection yes/no 5731 */ 5732 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5733 switch (link_key_type){ 5734 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5735 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5736 return true; 5737 default: 5738 return false; 5739 } 5740 } 5741 5742 /** 5743 * @brief map link keys to authenticated 5744 */ 5745 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5746 switch (link_key_type){ 5747 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5748 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5749 return true; 5750 default: 5751 return false; 5752 } 5753 } 5754 5755 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5756 log_info("gap_mitm_protection_required_for_security_level %u", level); 5757 return level > LEVEL_2; 5758 } 5759 5760 /** 5761 * @brief get current security level 5762 */ 5763 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5764 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5765 if (!connection) return LEVEL_0; 5766 return gap_security_level_for_connection(connection); 5767 } 5768 5769 /** 5770 * @brief request connection to device to 5771 * @result GAP_AUTHENTICATION_RESULT 5772 */ 5773 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5774 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5775 if (!connection){ 5776 hci_emit_security_level(con_handle, LEVEL_0); 5777 return; 5778 } 5779 5780 btstack_assert(hci_is_le_connection(connection) == false); 5781 5782 // 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) 5783 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5784 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5785 requested_level = LEVEL_4; 5786 } 5787 5788 gap_security_level_t current_level = gap_security_level(con_handle); 5789 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5790 requested_level, connection->requested_security_level, current_level); 5791 5792 // authentication active if authentication request was sent or planned level > 0 5793 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5794 if (authentication_active){ 5795 // authentication already active 5796 if (connection->requested_security_level < requested_level){ 5797 // increase requested level as new level is higher 5798 // TODO: handle re-authentication when done 5799 connection->requested_security_level = requested_level; 5800 } 5801 } else { 5802 // no request active, notify if security sufficient 5803 if (requested_level <= current_level){ 5804 hci_emit_security_level(con_handle, current_level); 5805 return; 5806 } 5807 5808 // store request 5809 connection->requested_security_level = requested_level; 5810 5811 // request remote features if not already active 5812 hci_remote_features_query(con_handle); 5813 5814 // start to authenticate connection 5815 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5816 hci_run(); 5817 } 5818 } 5819 5820 /** 5821 * @brief start dedicated bonding with device. disconnect after bonding 5822 * @param device 5823 * @param request MITM protection 5824 * @result GAP_DEDICATED_BONDING_COMPLETE 5825 */ 5826 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5827 5828 // create connection state machine 5829 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5830 5831 if (!connection){ 5832 return BTSTACK_MEMORY_ALLOC_FAILED; 5833 } 5834 5835 // delete linkn key 5836 gap_drop_link_key_for_bd_addr(device); 5837 5838 // configure LEVEL_2/3, dedicated bonding 5839 connection->state = SEND_CREATE_CONNECTION; 5840 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5841 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5842 connection->bonding_flags = BONDING_DEDICATED; 5843 5844 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5845 5846 // handle: connnection failure (connection complete != ok) 5847 // handle: authentication failure 5848 // handle: disconnect on done 5849 5850 hci_run(); 5851 5852 return 0; 5853 } 5854 5855 void gap_set_local_name(const char * local_name){ 5856 hci_stack->local_name = local_name; 5857 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 5858 // also update EIR if not set by user 5859 if (hci_stack->eir_data == NULL){ 5860 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 5861 } 5862 hci_run(); 5863 } 5864 #endif 5865 5866 5867 #ifdef ENABLE_BLE 5868 5869 #ifdef ENABLE_LE_CENTRAL 5870 void gap_start_scan(void){ 5871 hci_stack->le_scanning_enabled = true; 5872 hci_run(); 5873 } 5874 5875 void gap_stop_scan(void){ 5876 hci_stack->le_scanning_enabled = false; 5877 hci_run(); 5878 } 5879 5880 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5881 hci_stack->le_scan_type = scan_type; 5882 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5883 hci_stack->le_scan_interval = scan_interval; 5884 hci_stack->le_scan_window = scan_window; 5885 hci_stack->le_scanning_param_update = true; 5886 hci_run(); 5887 } 5888 5889 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5890 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5891 } 5892 5893 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5894 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5895 if (!conn){ 5896 // disallow if le connection is already outgoing 5897 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5898 log_error("le connection already active"); 5899 return ERROR_CODE_COMMAND_DISALLOWED; 5900 } 5901 5902 log_info("gap_connect: no connection exists yet, creating context"); 5903 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5904 if (!conn){ 5905 // notify client that alloc failed 5906 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5907 log_info("gap_connect: failed to alloc hci_connection_t"); 5908 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5909 } 5910 5911 // set le connecting state 5912 if (hci_is_le_connection_type(addr_type)){ 5913 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5914 } 5915 5916 conn->state = SEND_CREATE_CONNECTION; 5917 log_info("gap_connect: send create connection next"); 5918 hci_run(); 5919 return ERROR_CODE_SUCCESS; 5920 } 5921 5922 if (!hci_is_le_connection(conn) || 5923 (conn->state == SEND_CREATE_CONNECTION) || 5924 (conn->state == SENT_CREATE_CONNECTION)) { 5925 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5926 log_error("gap_connect: classic connection or connect is already being created"); 5927 return GATT_CLIENT_IN_WRONG_STATE; 5928 } 5929 5930 // check if connection was just disconnected 5931 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5932 log_info("gap_connect: send create connection (again)"); 5933 conn->state = SEND_CREATE_CONNECTION; 5934 hci_run(); 5935 return ERROR_CODE_SUCCESS; 5936 } 5937 5938 log_info("gap_connect: context exists with state %u", conn->state); 5939 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5940 hci_run(); 5941 return ERROR_CODE_SUCCESS; 5942 } 5943 5944 // @assumption: only a single outgoing LE Connection exists 5945 static hci_connection_t * gap_get_outgoing_connection(void){ 5946 btstack_linked_item_t *it; 5947 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5948 hci_connection_t * conn = (hci_connection_t *) it; 5949 if (!hci_is_le_connection(conn)) continue; 5950 switch (conn->state){ 5951 case SEND_CREATE_CONNECTION: 5952 case SENT_CREATE_CONNECTION: 5953 case SENT_CANCEL_CONNECTION: 5954 return conn; 5955 default: 5956 break; 5957 }; 5958 } 5959 return NULL; 5960 } 5961 5962 uint8_t gap_connect_cancel(void){ 5963 hci_connection_t * conn = gap_get_outgoing_connection(); 5964 if (!conn) return 0; 5965 switch (conn->state){ 5966 case SEND_CREATE_CONNECTION: 5967 // skip sending create connection and emit event instead 5968 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5969 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5970 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5971 btstack_memory_hci_connection_free( conn ); 5972 break; 5973 case SENT_CREATE_CONNECTION: 5974 // request to send cancel connection 5975 conn->state = SEND_CANCEL_CONNECTION; 5976 hci_run(); 5977 break; 5978 default: 5979 break; 5980 } 5981 return 0; 5982 } 5983 #endif 5984 5985 #ifdef ENABLE_LE_CENTRAL 5986 /** 5987 * @brief Set connection parameters for outgoing connections 5988 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5989 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5990 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5991 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5992 * @param conn_latency, default: 4 5993 * @param supervision_timeout (unit: 10ms), default: 720 ms 5994 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5995 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5996 */ 5997 5998 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5999 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 6000 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 6001 hci_stack->le_connection_scan_interval = conn_scan_interval; 6002 hci_stack->le_connection_scan_window = conn_scan_window; 6003 hci_stack->le_connection_interval_min = conn_interval_min; 6004 hci_stack->le_connection_interval_max = conn_interval_max; 6005 hci_stack->le_connection_latency = conn_latency; 6006 hci_stack->le_supervision_timeout = supervision_timeout; 6007 hci_stack->le_minimum_ce_length = min_ce_length; 6008 hci_stack->le_maximum_ce_length = max_ce_length; 6009 } 6010 #endif 6011 6012 /** 6013 * @brief Updates the connection parameters for a given LE connection 6014 * @param handle 6015 * @param conn_interval_min (unit: 1.25ms) 6016 * @param conn_interval_max (unit: 1.25ms) 6017 * @param conn_latency 6018 * @param supervision_timeout (unit: 10ms) 6019 * @return 0 if ok 6020 */ 6021 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6022 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6023 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6024 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6025 connection->le_conn_interval_min = conn_interval_min; 6026 connection->le_conn_interval_max = conn_interval_max; 6027 connection->le_conn_latency = conn_latency; 6028 connection->le_supervision_timeout = supervision_timeout; 6029 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6030 hci_run(); 6031 return 0; 6032 } 6033 6034 /** 6035 * @brief Request an update of the connection parameter for a given LE connection 6036 * @param handle 6037 * @param conn_interval_min (unit: 1.25ms) 6038 * @param conn_interval_max (unit: 1.25ms) 6039 * @param conn_latency 6040 * @param supervision_timeout (unit: 10ms) 6041 * @return 0 if ok 6042 */ 6043 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6044 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6045 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6046 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6047 connection->le_conn_interval_min = conn_interval_min; 6048 connection->le_conn_interval_max = conn_interval_max; 6049 connection->le_conn_latency = conn_latency; 6050 connection->le_supervision_timeout = supervision_timeout; 6051 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6052 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6053 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6054 return 0; 6055 } 6056 6057 #ifdef ENABLE_LE_PERIPHERAL 6058 6059 /** 6060 * @brief Set Advertisement Data 6061 * @param advertising_data_length 6062 * @param advertising_data (max 31 octets) 6063 * @note data is not copied, pointer has to stay valid 6064 */ 6065 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6066 hci_stack->le_advertisements_data_len = advertising_data_length; 6067 hci_stack->le_advertisements_data = advertising_data; 6068 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6069 hci_run(); 6070 } 6071 6072 /** 6073 * @brief Set Scan Response Data 6074 * @param advertising_data_length 6075 * @param advertising_data (max 31 octets) 6076 * @note data is not copied, pointer has to stay valid 6077 */ 6078 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6079 hci_stack->le_scan_response_data_len = scan_response_data_length; 6080 hci_stack->le_scan_response_data = scan_response_data; 6081 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6082 hci_run(); 6083 } 6084 6085 /** 6086 * @brief Set Advertisement Parameters 6087 * @param adv_int_min 6088 * @param adv_int_max 6089 * @param adv_type 6090 * @param direct_address_type 6091 * @param direct_address 6092 * @param channel_map 6093 * @param filter_policy 6094 * 6095 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6096 */ 6097 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6098 uint8_t direct_address_typ, bd_addr_t direct_address, 6099 uint8_t channel_map, uint8_t filter_policy) { 6100 6101 hci_stack->le_advertisements_interval_min = adv_int_min; 6102 hci_stack->le_advertisements_interval_max = adv_int_max; 6103 hci_stack->le_advertisements_type = adv_type; 6104 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6105 hci_stack->le_advertisements_channel_map = channel_map; 6106 hci_stack->le_advertisements_filter_policy = filter_policy; 6107 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6108 6); 6109 6110 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6111 hci_run(); 6112 } 6113 6114 /** 6115 * @brief Enable/Disable Advertisements 6116 * @param enabled 6117 */ 6118 void gap_advertisements_enable(int enabled){ 6119 hci_stack->le_advertisements_enabled = enabled != 0; 6120 hci_update_advertisements_enabled_for_current_roles(); 6121 hci_run(); 6122 } 6123 6124 #endif 6125 6126 void hci_le_set_own_address_type(uint8_t own_address_type){ 6127 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6128 if (own_address_type == hci_stack->le_own_addr_type) return; 6129 hci_stack->le_own_addr_type = own_address_type; 6130 6131 #ifdef ENABLE_LE_PERIPHERAL 6132 // update advertisement parameters, too 6133 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6134 hci_run(); 6135 #endif 6136 #ifdef ENABLE_LE_CENTRAL 6137 // note: we don't update scan parameters or modify ongoing connection attempts 6138 #endif 6139 } 6140 6141 void hci_le_random_address_set(const bd_addr_t random_address){ 6142 memcpy(hci_stack->le_random_address, random_address, 6); 6143 hci_stack->le_random_address_set = true; 6144 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6145 hci_run(); 6146 } 6147 6148 #endif 6149 6150 uint8_t gap_disconnect(hci_con_handle_t handle){ 6151 hci_connection_t * conn = hci_connection_for_handle(handle); 6152 if (!conn){ 6153 hci_emit_disconnection_complete(handle, 0); 6154 return 0; 6155 } 6156 // ignore if already disconnected 6157 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6158 return 0; 6159 } 6160 conn->state = SEND_DISCONNECT; 6161 hci_run(); 6162 return 0; 6163 } 6164 6165 int gap_read_rssi(hci_con_handle_t con_handle){ 6166 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6167 if (hci_connection == NULL) return 0; 6168 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6169 hci_run(); 6170 return 1; 6171 } 6172 6173 /** 6174 * @brief Get connection type 6175 * @param con_handle 6176 * @result connection_type 6177 */ 6178 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6179 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6180 if (!conn) return GAP_CONNECTION_INVALID; 6181 switch (conn->address_type){ 6182 case BD_ADDR_TYPE_LE_PUBLIC: 6183 case BD_ADDR_TYPE_LE_RANDOM: 6184 return GAP_CONNECTION_LE; 6185 case BD_ADDR_TYPE_SCO: 6186 return GAP_CONNECTION_SCO; 6187 case BD_ADDR_TYPE_ACL: 6188 return GAP_CONNECTION_ACL; 6189 default: 6190 return GAP_CONNECTION_INVALID; 6191 } 6192 } 6193 6194 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6195 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6196 if (!conn) return HCI_ROLE_INVALID; 6197 return (hci_role_t) conn->role; 6198 } 6199 6200 6201 #ifdef ENABLE_CLASSIC 6202 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6203 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6204 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6205 conn->request_role = role; 6206 hci_run(); 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 #endif 6210 6211 #ifdef ENABLE_BLE 6212 6213 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){ 6214 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6215 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6216 6217 conn->le_phy_update_all_phys = all_phys; 6218 conn->le_phy_update_tx_phys = tx_phys; 6219 conn->le_phy_update_rx_phys = rx_phys; 6220 conn->le_phy_update_phy_options = phy_options; 6221 6222 hci_run(); 6223 6224 return 0; 6225 } 6226 6227 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6228 // check if already in list 6229 btstack_linked_list_iterator_t it; 6230 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6231 while (btstack_linked_list_iterator_has_next(&it)) { 6232 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6233 if (entry->address_type != address_type) { 6234 continue; 6235 } 6236 if (memcmp(entry->address, address, 6) != 0) { 6237 continue; 6238 } 6239 // disallow if already scheduled to add 6240 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6241 return ERROR_CODE_COMMAND_DISALLOWED; 6242 } 6243 // still on controller, but scheduled to remove -> re-add 6244 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6245 return ERROR_CODE_SUCCESS; 6246 } 6247 // alloc and add to list 6248 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6249 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6250 entry->address_type = address_type; 6251 (void)memcpy(entry->address, address, 6); 6252 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6253 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6254 return ERROR_CODE_SUCCESS; 6255 } 6256 6257 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6258 btstack_linked_list_iterator_t it; 6259 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6260 while (btstack_linked_list_iterator_has_next(&it)){ 6261 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6262 if (entry->address_type != address_type) { 6263 continue; 6264 } 6265 if (memcmp(entry->address, address, 6) != 0) { 6266 continue; 6267 } 6268 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6269 // remove from controller if already present 6270 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6271 } else { 6272 // directly remove entry from whitelist 6273 btstack_linked_list_iterator_remove(&it); 6274 btstack_memory_whitelist_entry_free(entry); 6275 } 6276 return ERROR_CODE_SUCCESS; 6277 } 6278 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6279 } 6280 6281 static void hci_whitelist_clear(void){ 6282 btstack_linked_list_iterator_t it; 6283 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6284 while (btstack_linked_list_iterator_has_next(&it)){ 6285 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6286 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6287 // remove from controller if already present 6288 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6289 continue; 6290 } 6291 // directly remove entry from whitelist 6292 btstack_linked_list_iterator_remove(&it); 6293 btstack_memory_whitelist_entry_free(entry); 6294 } 6295 } 6296 6297 // free all entries unconditionally 6298 static void hci_whitelist_free(void){ 6299 btstack_linked_list_iterator_t lit; 6300 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6301 while (btstack_linked_list_iterator_has_next(&lit)){ 6302 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6303 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6304 btstack_memory_whitelist_entry_free(entry); 6305 } 6306 } 6307 6308 /** 6309 * @brief Clear Whitelist 6310 * @return 0 if ok 6311 */ 6312 uint8_t gap_whitelist_clear(void){ 6313 hci_whitelist_clear(); 6314 hci_run(); 6315 return ERROR_CODE_SUCCESS; 6316 } 6317 6318 /** 6319 * @brief Add Device to Whitelist 6320 * @param address_typ 6321 * @param address 6322 * @return 0 if ok 6323 */ 6324 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6325 uint8_t status = hci_whitelist_add(address_type, address); 6326 if (status){ 6327 return status; 6328 } 6329 hci_run(); 6330 return ERROR_CODE_SUCCESS; 6331 } 6332 6333 /** 6334 * @brief Remove Device from Whitelist 6335 * @param address_typ 6336 * @param address 6337 * @return 0 if ok 6338 */ 6339 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6340 uint8_t status = hci_whitelist_remove(address_type, address); 6341 if (status){ 6342 return status; 6343 } 6344 hci_run(); 6345 return ERROR_CODE_SUCCESS; 6346 } 6347 6348 #ifdef ENABLE_LE_CENTRAL 6349 /** 6350 * @brief Connect with Whitelist 6351 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6352 * @return - if ok 6353 */ 6354 uint8_t gap_connect_with_whitelist(void){ 6355 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6356 return ERROR_CODE_COMMAND_DISALLOWED; 6357 } 6358 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6359 hci_run(); 6360 return ERROR_CODE_SUCCESS; 6361 } 6362 6363 /** 6364 * @brief Auto Connection Establishment - Start Connecting to device 6365 * @param address_typ 6366 * @param address 6367 * @return 0 if ok 6368 */ 6369 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6370 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6371 return ERROR_CODE_COMMAND_DISALLOWED; 6372 } 6373 6374 uint8_t status = hci_whitelist_add(address_type, address); 6375 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6376 return status; 6377 } 6378 6379 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6380 6381 hci_run(); 6382 return ERROR_CODE_SUCCESS; 6383 } 6384 6385 /** 6386 * @brief Auto Connection Establishment - Stop Connecting to device 6387 * @param address_typ 6388 * @param address 6389 * @return 0 if ok 6390 */ 6391 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6392 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6393 return ERROR_CODE_COMMAND_DISALLOWED; 6394 } 6395 6396 hci_whitelist_remove(address_type, address); 6397 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6398 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6399 } 6400 hci_run(); 6401 return 0; 6402 } 6403 6404 /** 6405 * @brief Auto Connection Establishment - Stop everything 6406 * @note Convenience function to stop all active auto connection attempts 6407 */ 6408 uint8_t gap_auto_connection_stop_all(void){ 6409 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6410 return ERROR_CODE_COMMAND_DISALLOWED; 6411 } 6412 hci_whitelist_clear(); 6413 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6414 hci_run(); 6415 return ERROR_CODE_SUCCESS; 6416 } 6417 6418 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6419 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6420 if (!conn) return 0; 6421 return conn->le_connection_interval; 6422 } 6423 #endif 6424 #endif 6425 6426 #ifdef ENABLE_CLASSIC 6427 /** 6428 * @brief Set Extended Inquiry Response data 6429 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6430 * @note has to be done before stack starts up 6431 */ 6432 void gap_set_extended_inquiry_response(const uint8_t * data){ 6433 hci_stack->eir_data = data; 6434 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 6435 hci_run(); 6436 } 6437 6438 /** 6439 * @brief Start GAP Classic Inquiry 6440 * @param duration in 1.28s units 6441 * @return 0 if ok 6442 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6443 */ 6444 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6445 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6446 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6447 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6448 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6449 } 6450 hci_stack->inquiry_state = duration_in_1280ms_units; 6451 hci_run(); 6452 return 0; 6453 } 6454 6455 /** 6456 * @brief Stop GAP Classic Inquiry 6457 * @return 0 if ok 6458 */ 6459 int gap_inquiry_stop(void){ 6460 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6461 // emit inquiry complete event, before it even started 6462 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6463 hci_emit_event(event, sizeof(event), 1); 6464 return 0; 6465 } 6466 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6467 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6468 hci_run(); 6469 return 0; 6470 } 6471 6472 void gap_inquiry_set_lap(uint32_t lap){ 6473 hci_stack->inquiry_lap = lap; 6474 } 6475 6476 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6477 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6478 hci_stack->inquiry_scan_window = inquiry_scan_window; 6479 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6480 hci_run(); 6481 } 6482 6483 6484 /** 6485 * @brief Remote Name Request 6486 * @param addr 6487 * @param page_scan_repetition_mode 6488 * @param clock_offset only used when bit 15 is set 6489 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6490 */ 6491 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6492 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6493 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6494 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6495 hci_stack->remote_name_clock_offset = clock_offset; 6496 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6497 hci_run(); 6498 return 0; 6499 } 6500 6501 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6502 hci_stack->gap_pairing_state = state; 6503 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6504 hci_run(); 6505 return 0; 6506 } 6507 6508 /** 6509 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6510 * @param addr 6511 * @param pin_data 6512 * @param pin_len 6513 * @return 0 if ok 6514 */ 6515 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6516 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6517 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6518 hci_stack->gap_pairing_pin_len = pin_len; 6519 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6520 } 6521 6522 /** 6523 * @brief Legacy Pairing Pin Code Response 6524 * @param addr 6525 * @param pin 6526 * @return 0 if ok 6527 */ 6528 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6529 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6530 } 6531 6532 /** 6533 * @brief Abort Legacy Pairing 6534 * @param addr 6535 * @param pin 6536 * @return 0 if ok 6537 */ 6538 int gap_pin_code_negative(bd_addr_t addr){ 6539 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6540 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6541 } 6542 6543 /** 6544 * @brief SSP Passkey Response 6545 * @param addr 6546 * @param passkey 6547 * @return 0 if ok 6548 */ 6549 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6550 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6551 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6552 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6553 } 6554 6555 /** 6556 * @brief Abort SSP Passkey Entry/Pairing 6557 * @param addr 6558 * @param pin 6559 * @return 0 if ok 6560 */ 6561 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6562 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6563 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6564 } 6565 6566 /** 6567 * @brief Accept SSP Numeric Comparison 6568 * @param addr 6569 * @param passkey 6570 * @return 0 if ok 6571 */ 6572 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6573 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6574 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6575 } 6576 6577 /** 6578 * @brief Abort SSP Numeric Comparison/Pairing 6579 * @param addr 6580 * @param pin 6581 * @return 0 if ok 6582 */ 6583 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6584 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6585 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6586 } 6587 6588 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6589 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6590 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6591 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6592 connectionSetAuthenticationFlags(conn, flag); 6593 hci_run(); 6594 return ERROR_CODE_SUCCESS; 6595 } 6596 #endif 6597 6598 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6599 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6600 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6601 } 6602 6603 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6604 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6605 } 6606 #endif 6607 6608 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6609 /** 6610 * @brief Report Remote OOB Data 6611 * @param bd_addr 6612 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6613 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6614 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6615 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6616 */ 6617 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){ 6618 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6619 if (connection == NULL) { 6620 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6621 } 6622 connection->classic_oob_c_192 = c_192; 6623 connection->classic_oob_r_192 = r_192; 6624 6625 // ignore P-256 if not supported by us 6626 if (hci_stack->secure_connections_active){ 6627 connection->classic_oob_c_256 = c_256; 6628 connection->classic_oob_r_256 = r_256; 6629 } 6630 6631 return ERROR_CODE_SUCCESS; 6632 } 6633 /** 6634 * @brief Generate new OOB data 6635 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6636 */ 6637 void gap_ssp_generate_oob_data(void){ 6638 hci_stack->classic_read_local_oob_data = true; 6639 hci_run(); 6640 } 6641 6642 #endif 6643 6644 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6645 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6646 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6647 if (connection == NULL) { 6648 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6649 } 6650 6651 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6652 connection->link_key_type = type; 6653 6654 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6655 } 6656 6657 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6658 /** 6659 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6660 * @param inquiry_mode see bluetooth_defines.h 6661 */ 6662 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6663 hci_stack->inquiry_mode = inquiry_mode; 6664 } 6665 6666 /** 6667 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6668 */ 6669 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6670 hci_stack->sco_voice_setting = voice_setting; 6671 } 6672 6673 /** 6674 * @brief Get SCO Voice Setting 6675 * @return current voice setting 6676 */ 6677 uint16_t hci_get_sco_voice_setting(void){ 6678 return hci_stack->sco_voice_setting; 6679 } 6680 6681 static int hci_have_usb_transport(void){ 6682 if (!hci_stack->hci_transport) return 0; 6683 const char * transport_name = hci_stack->hci_transport->name; 6684 if (!transport_name) return 0; 6685 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6686 } 6687 6688 /** @brief Get SCO packet length for current SCO Voice setting 6689 * @note Using SCO packets of the exact length is required for USB transfer 6690 * @return Length of SCO packets in bytes (not audio frames) 6691 */ 6692 uint16_t hci_get_sco_packet_length(void){ 6693 uint16_t sco_packet_length = 0; 6694 6695 #ifdef ENABLE_SCO_OVER_HCI 6696 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6697 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6698 6699 if (hci_have_usb_transport()){ 6700 // see Core Spec for H2 USB Transfer. 6701 // 3 byte SCO header + 24 bytes per connection 6702 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6703 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6704 } else { 6705 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6706 sco_packet_length = 3 + 60 * multiplier; 6707 // assert that it still fits inside an SCO buffer 6708 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6709 sco_packet_length = 3 + 60; 6710 } 6711 } 6712 #endif 6713 6714 #ifdef HAVE_SCO_TRANSPORT 6715 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6716 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6717 sco_packet_length = 3 + 60 * multiplier; 6718 #endif 6719 return sco_packet_length; 6720 } 6721 6722 /** 6723 * @brief Sets the master/slave policy 6724 * @param policy (0: attempt to become master, 1: let connecting device decide) 6725 */ 6726 void hci_set_master_slave_policy(uint8_t policy){ 6727 hci_stack->master_slave_policy = policy; 6728 } 6729 6730 #endif 6731 6732 HCI_STATE hci_get_state(void){ 6733 return hci_stack->state; 6734 } 6735 6736 #ifdef ENABLE_CLASSIC 6737 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6738 hci_stack->gap_classic_accept_callback = accept_callback; 6739 } 6740 #endif 6741 6742 /** 6743 * @brief Set callback for Bluetooth Hardware Error 6744 */ 6745 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6746 hci_stack->hardware_error_callback = fn; 6747 } 6748 6749 void hci_disconnect_all(void){ 6750 btstack_linked_list_iterator_t it; 6751 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6752 while (btstack_linked_list_iterator_has_next(&it)){ 6753 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6754 if (con->state == SENT_DISCONNECT) continue; 6755 con->state = SEND_DISCONNECT; 6756 } 6757 hci_run(); 6758 } 6759 6760 uint16_t hci_get_manufacturer(void){ 6761 return hci_stack->manufacturer; 6762 } 6763 6764 #ifdef ENABLE_BLE 6765 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6766 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6767 if (!hci_con) return NULL; 6768 return &hci_con->sm_connection; 6769 } 6770 6771 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6772 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6773 #endif 6774 6775 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 6776 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6777 if (hci_connection == NULL) return 0; 6778 if (hci_is_le_connection(hci_connection)){ 6779 #ifdef ENABLE_BLE 6780 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6781 if (sm_conn->sm_connection_encrypted) { 6782 return sm_conn->sm_actual_encryption_key_size; 6783 } 6784 #endif 6785 } else { 6786 #ifdef ENABLE_CLASSIC 6787 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6788 return hci_connection->encryption_key_size; 6789 } 6790 #endif 6791 } 6792 return 0; 6793 } 6794 6795 bool gap_authenticated(hci_con_handle_t con_handle){ 6796 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6797 if (hci_connection == NULL) return false; 6798 6799 switch (hci_connection->address_type){ 6800 #ifdef ENABLE_BLE 6801 case BD_ADDR_TYPE_LE_PUBLIC: 6802 case BD_ADDR_TYPE_LE_RANDOM: 6803 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6804 return hci_connection->sm_connection.sm_connection_authenticated != 0; 6805 #endif 6806 #ifdef ENABLE_CLASSIC 6807 case BD_ADDR_TYPE_SCO: 6808 case BD_ADDR_TYPE_ACL: 6809 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6810 #endif 6811 default: 6812 return false; 6813 } 6814 } 6815 6816 bool gap_secure_connection(hci_con_handle_t con_handle){ 6817 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6818 if (hci_connection == NULL) return 0; 6819 6820 switch (hci_connection->address_type){ 6821 #ifdef ENABLE_BLE 6822 case BD_ADDR_TYPE_LE_PUBLIC: 6823 case BD_ADDR_TYPE_LE_RANDOM: 6824 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 6825 return hci_connection->sm_connection.sm_connection_sc != 0; 6826 #endif 6827 #ifdef ENABLE_CLASSIC 6828 case BD_ADDR_TYPE_SCO: 6829 case BD_ADDR_TYPE_ACL: 6830 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6831 #endif 6832 default: 6833 return false; 6834 } 6835 } 6836 6837 bool gap_bonded(hci_con_handle_t con_handle){ 6838 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6839 if (hci_connection == NULL) return 0; 6840 6841 #ifdef ENABLE_CLASSIC 6842 link_key_t link_key; 6843 link_key_type_t link_key_type; 6844 #endif 6845 switch (hci_connection->address_type){ 6846 #ifdef ENABLE_BLE 6847 case BD_ADDR_TYPE_LE_PUBLIC: 6848 case BD_ADDR_TYPE_LE_RANDOM: 6849 return hci_connection->sm_connection.sm_le_db_index >= 0; 6850 #endif 6851 #ifdef ENABLE_CLASSIC 6852 case BD_ADDR_TYPE_SCO: 6853 case BD_ADDR_TYPE_ACL: 6854 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6855 #endif 6856 default: 6857 return false; 6858 } 6859 } 6860 6861 #ifdef ENABLE_BLE 6862 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6863 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6864 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6865 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6866 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6867 return sm_conn->sm_connection_authorization_state; 6868 } 6869 #endif 6870 6871 #ifdef ENABLE_CLASSIC 6872 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){ 6873 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6874 if (!conn) return GAP_CONNECTION_INVALID; 6875 conn->sniff_min_interval = sniff_min_interval; 6876 conn->sniff_max_interval = sniff_max_interval; 6877 conn->sniff_attempt = sniff_attempt; 6878 conn->sniff_timeout = sniff_timeout; 6879 hci_run(); 6880 return 0; 6881 } 6882 6883 /** 6884 * @brief Exit Sniff mode 6885 * @param con_handle 6886 @ @return 0 if ok 6887 */ 6888 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6889 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6890 if (!conn) return GAP_CONNECTION_INVALID; 6891 conn->sniff_min_interval = 0xffff; 6892 hci_run(); 6893 return 0; 6894 } 6895 6896 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){ 6897 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6898 if (!conn) return GAP_CONNECTION_INVALID; 6899 conn->sniff_subrating_max_latency = max_latency; 6900 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6901 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6902 hci_run(); 6903 return ERROR_CODE_SUCCESS; 6904 } 6905 6906 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){ 6907 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6908 if (!conn) return GAP_CONNECTION_INVALID; 6909 conn->qos_service_type = service_type; 6910 conn->qos_token_rate = token_rate; 6911 conn->qos_peak_bandwidth = peak_bandwidth; 6912 conn->qos_latency = latency; 6913 conn->qos_delay_variation = delay_variation; 6914 hci_run(); 6915 return ERROR_CODE_SUCCESS; 6916 } 6917 6918 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6919 hci_stack->new_page_scan_interval = page_scan_interval; 6920 hci_stack->new_page_scan_window = page_scan_window; 6921 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6922 hci_run(); 6923 } 6924 6925 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6926 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6927 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6928 hci_run(); 6929 } 6930 6931 void gap_set_page_timeout(uint16_t page_timeout){ 6932 hci_stack->page_timeout = page_timeout; 6933 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6934 hci_run(); 6935 } 6936 6937 #endif 6938 6939 void hci_halting_defer(void){ 6940 if (hci_stack->state != HCI_STATE_HALTING) return; 6941 switch (hci_stack->substate){ 6942 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6943 case HCI_HALTING_CLOSE: 6944 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6945 break; 6946 default: 6947 break; 6948 } 6949 } 6950 6951 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6952 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6953 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6954 if (le_device_db_index >= le_device_db_max_count()) return; 6955 uint8_t offset = le_device_db_index >> 3; 6956 uint8_t mask = 1 << (le_device_db_index & 7); 6957 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6958 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6959 // note: go back to remove entries, otherwise, a remove + add will skip the add 6960 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6961 } 6962 } 6963 6964 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6965 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6966 if (le_device_db_index >= le_device_db_max_count()) return; 6967 uint8_t offset = le_device_db_index >> 3; 6968 uint8_t mask = 1 << (le_device_db_index & 7); 6969 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6970 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6971 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6972 } 6973 } 6974 6975 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6976 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6977 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6978 } 6979 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6980 // restart le resolving list update 6981 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6982 } 6983 return ERROR_CODE_SUCCESS; 6984 } 6985 #endif 6986 6987 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6988 void hci_setup_test_connections_fuzz(void){ 6989 hci_connection_t * conn; 6990 6991 // default address: 66:55:44:33:00:01 6992 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6993 6994 // setup Controller info 6995 hci_stack->num_cmd_packets = 255; 6996 hci_stack->acl_packets_total_num = 255; 6997 6998 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6999 addr[5] = 0x01; 7000 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7001 conn->con_handle = addr[5]; 7002 conn->role = HCI_ROLE_SLAVE; 7003 conn->state = RECEIVED_CONNECTION_REQUEST; 7004 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7005 7006 // setup incoming Classic SCO connection with con handle 0x0002 7007 addr[5] = 0x02; 7008 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7009 conn->con_handle = addr[5]; 7010 conn->role = HCI_ROLE_SLAVE; 7011 conn->state = RECEIVED_CONNECTION_REQUEST; 7012 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7013 7014 // setup ready Classic ACL connection with con handle 0x0003 7015 addr[5] = 0x03; 7016 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7017 conn->con_handle = addr[5]; 7018 conn->role = HCI_ROLE_SLAVE; 7019 conn->state = OPEN; 7020 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7021 7022 // setup ready Classic SCO connection with con handle 0x0004 7023 addr[5] = 0x04; 7024 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7025 conn->con_handle = addr[5]; 7026 conn->role = HCI_ROLE_SLAVE; 7027 conn->state = OPEN; 7028 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7029 7030 // setup ready LE ACL connection with con handle 0x005 and public address 7031 addr[5] = 0x05; 7032 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7033 conn->con_handle = addr[5]; 7034 conn->role = HCI_ROLE_SLAVE; 7035 conn->state = OPEN; 7036 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7037 conn->sm_connection.sm_connection_encrypted = 1; 7038 } 7039 7040 void hci_free_connections_fuzz(void){ 7041 btstack_linked_list_iterator_t it; 7042 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7043 while (btstack_linked_list_iterator_has_next(&it)){ 7044 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7045 btstack_linked_list_iterator_remove(&it); 7046 btstack_memory_hci_connection_free(con); 7047 } 7048 } 7049 void hci_simulate_working_fuzz(void){ 7050 hci_init_done(); 7051 hci_stack->num_cmd_packets = 255; 7052 } 7053 #endif 7054