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 #endif 179 #endif 180 181 // the STACK is here 182 #ifndef HAVE_MALLOC 183 static hci_stack_t hci_stack_static; 184 #endif 185 static hci_stack_t * hci_stack = NULL; 186 187 #ifdef ENABLE_CLASSIC 188 // default name 189 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 190 191 // test helper 192 static uint8_t disable_l2cap_timeouts = 0; 193 #endif 194 195 // reset connection state on create and on reconnect 196 // don't overwrite addr, con handle, role 197 static void hci_connection_init(hci_connection_t * conn){ 198 conn->authentication_flags = AUTH_FLAG_NONE; 199 conn->bonding_flags = 0; 200 conn->requested_security_level = LEVEL_0; 201 #ifdef ENABLE_CLASSIC 202 conn->request_role = HCI_ROLE_INVALID; 203 conn->sniff_subrating_max_latency = 0xffff; 204 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 205 conn->link_key_type = INVALID_LINK_KEY; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 #ifdef ENABLE_CLASSIC_PAIRING_OOB 222 conn->classic_oob_c_192 = NULL; 223 conn->classic_oob_r_192 = NULL; 224 conn->classic_oob_c_256 = NULL; 225 conn->classic_oob_r_256 = NULL; 226 #endif 227 } 228 229 /** 230 * create connection for given address 231 * 232 * @return connection OR NULL, if no memory left 233 */ 234 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 235 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 236 237 hci_connection_t * conn = btstack_memory_hci_connection_get(); 238 if (!conn) return NULL; 239 hci_connection_init(conn); 240 241 bd_addr_copy(conn->address, addr); 242 conn->address_type = addr_type; 243 conn->con_handle = HCI_CON_HANDLE_INVALID; 244 conn->role = HCI_ROLE_INVALID; 245 246 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 247 248 return conn; 249 } 250 251 252 /** 253 * get le connection parameter range 254 * 255 * @return le connection parameter range struct 256 */ 257 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 258 *range = hci_stack->le_connection_parameter_range; 259 } 260 261 /** 262 * set le connection parameter range 263 * 264 */ 265 266 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 267 hci_stack->le_connection_parameter_range = *range; 268 } 269 270 /** 271 * @brief Test if connection parameters are inside in existing rage 272 * @param conn_interval_min (unit: 1.25ms) 273 * @param conn_interval_max (unit: 1.25ms) 274 * @param conn_latency 275 * @param supervision_timeout (unit: 10ms) 276 * @return 1 if included 277 */ 278 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){ 279 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 280 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 281 282 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 283 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 284 285 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 286 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 287 288 return 1; 289 } 290 291 /** 292 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 293 * @note: default: 1 294 * @param max_peripheral_connections 295 */ 296 #ifdef ENABLE_LE_PERIPHERAL 297 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 298 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 299 } 300 #endif 301 302 /** 303 * get hci connections iterator 304 * 305 * @return hci connections iterator 306 */ 307 308 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 309 btstack_linked_list_iterator_init(it, &hci_stack->connections); 310 } 311 312 /** 313 * get connection for a given handle 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if ( item->con_handle == con_handle ) { 323 return item; 324 } 325 } 326 return NULL; 327 } 328 329 /** 330 * get connection for given address 331 * 332 * @return connection OR NULL, if not found 333 */ 334 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 335 btstack_linked_list_iterator_t it; 336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 337 while (btstack_linked_list_iterator_has_next(&it)){ 338 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 339 if (connection->address_type != addr_type) continue; 340 if (memcmp(addr, connection->address, 6) != 0) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 348 } 349 350 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 352 } 353 354 #ifdef ENABLE_CLASSIC 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int hci_number_sco_connections(void){ 358 int connections = 0; 359 btstack_linked_list_iterator_t it; 360 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 361 while (btstack_linked_list_iterator_has_next(&it)){ 362 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 363 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 364 connections++; 365 } 366 return connections; 367 } 368 #endif 369 370 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 371 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 372 #ifdef HAVE_EMBEDDED_TICK 373 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 374 // connections might be timed out 375 hci_emit_l2cap_check_timeout(connection); 376 } 377 #else 378 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 379 // connections might be timed out 380 hci_emit_l2cap_check_timeout(connection); 381 } 382 #endif 383 } 384 385 static void hci_connection_timestamp(hci_connection_t *connection){ 386 #ifdef HAVE_EMBEDDED_TICK 387 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 388 #else 389 connection->timestamp = btstack_run_loop_get_time_ms(); 390 #endif 391 } 392 393 /** 394 * add authentication flags and reset timer 395 * @note: assumes classic connection 396 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 397 */ 398 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 399 bd_addr_t addr; 400 reverse_bd_addr(bd_addr, addr); 401 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 402 if (conn) { 403 connectionSetAuthenticationFlags(conn, flags); 404 hci_connection_timestamp(conn); 405 } 406 } 407 408 static bool hci_pairing_active(hci_connection_t * hci_connection){ 409 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 410 } 411 412 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 413 if (hci_pairing_active(hci_connection)) return; 414 if (ssp){ 415 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 416 } else { 417 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 418 } 419 // if we are initiator, we have sent an HCI Authenticate Request 420 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 421 422 // if we are responder, use minimal service security level as required level 423 if (!initiator){ 424 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); 425 } 426 427 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 428 429 uint8_t event[12]; 430 event[0] = GAP_EVENT_PAIRING_STARTED; 431 event[1] = 10; 432 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 433 reverse_bd_addr(hci_connection->address, &event[4]); 434 event[10] = (uint8_t) ssp; 435 event[11] = (uint8_t) initiator; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 440 hci_connection->requested_security_level = LEVEL_0; 441 if (!hci_pairing_active(hci_connection)) return; 442 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 443 #ifdef ENABLE_CLASSIC_PAIRING_OOB 444 hci_connection->classic_oob_c_192 = NULL; 445 hci_connection->classic_oob_r_192 = NULL; 446 hci_connection->classic_oob_c_256 = NULL; 447 hci_connection->classic_oob_r_256 = NULL; 448 #endif 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[11]; 452 event[0] = GAP_EVENT_PAIRING_COMPLETE; 453 event[1] = 9; 454 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 455 reverse_bd_addr(hci_connection->address, &event[4]); 456 event[10] = status; 457 hci_emit_event(event, sizeof(event), 1); 458 } 459 460 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 461 hci_connection_t * conn = hci_connection_for_handle(handle); 462 if (!conn) return false; 463 return hci_pairing_active(conn); 464 } 465 466 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 467 if (!hci_stack->link_key_db) return; 468 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 469 hci_stack->link_key_db->delete_link_key(addr); 470 } 471 472 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 473 if (!hci_stack->link_key_db) return; 474 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 475 hci_stack->link_key_db->put_link_key(addr, link_key, type); 476 } 477 478 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 479 if (!hci_stack->link_key_db) return false; 480 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 481 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 482 return result; 483 } 484 485 void gap_delete_all_link_keys(void){ 486 bd_addr_t addr; 487 link_key_t link_key; 488 link_key_type_t type; 489 btstack_link_key_iterator_t it; 490 int ok = gap_link_key_iterator_init(&it); 491 if (!ok) { 492 log_error("could not initialize iterator"); 493 return; 494 } 495 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 496 gap_drop_link_key_for_bd_addr(addr); 497 } 498 gap_link_key_iterator_done(&it); 499 } 500 501 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 502 if (!hci_stack->link_key_db) return 0; 503 if (!hci_stack->link_key_db->iterator_init) return 0; 504 return hci_stack->link_key_db->iterator_init(it); 505 } 506 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){ 507 if (!hci_stack->link_key_db) return 0; 508 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 509 } 510 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 511 if (!hci_stack->link_key_db) return; 512 hci_stack->link_key_db->iterator_done(it); 513 } 514 #endif 515 516 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 517 switch (address_type){ 518 case BD_ADDR_TYPE_LE_PUBLIC: 519 case BD_ADDR_TYPE_LE_RANDOM: 520 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 522 return true; 523 default: 524 return false; 525 } 526 } 527 528 static int hci_is_le_connection(hci_connection_t * connection){ 529 return hci_is_le_connection_type(connection->address_type); 530 } 531 532 /** 533 * count connections 534 */ 535 static int nr_hci_connections(void){ 536 int count = 0; 537 btstack_linked_item_t *it; 538 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 539 count++; 540 } 541 return count; 542 } 543 544 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 545 546 unsigned int num_packets_sent_classic = 0; 547 unsigned int num_packets_sent_le = 0; 548 549 btstack_linked_item_t *it; 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (hci_is_le_connection(connection)){ 553 num_packets_sent_le += connection->num_packets_sent; 554 } 555 if (connection->address_type == BD_ADDR_TYPE_ACL){ 556 num_packets_sent_classic += connection->num_packets_sent; 557 } 558 } 559 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 560 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 561 int free_slots_le = 0; 562 563 if (free_slots_classic < 0){ 564 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); 565 return 0; 566 } 567 568 if (hci_stack->le_acl_packets_total_num){ 569 // if we have LE slots, they are used 570 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 571 if (free_slots_le < 0){ 572 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); 573 return 0; 574 } 575 } else { 576 // otherwise, classic slots are used for LE, too 577 free_slots_classic -= num_packets_sent_le; 578 if (free_slots_classic < 0){ 579 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); 580 return 0; 581 } 582 } 583 584 switch (address_type){ 585 case BD_ADDR_TYPE_UNKNOWN: 586 log_error("hci_number_free_acl_slots: unknown address type"); 587 return 0; 588 589 case BD_ADDR_TYPE_ACL: 590 return (uint16_t) free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num > 0){ 594 return (uint16_t) free_slots_le; 595 } 596 return (uint16_t) free_slots_classic; 597 } 598 } 599 600 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 601 // get connection type 602 hci_connection_t * connection = hci_connection_for_handle(con_handle); 603 if (!connection){ 604 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 605 return 0; 606 } 607 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 608 } 609 610 #ifdef ENABLE_CLASSIC 611 static int hci_number_free_sco_slots(void){ 612 unsigned int num_sco_packets_sent = 0; 613 btstack_linked_item_t *it; 614 if (hci_stack->synchronous_flow_control_enabled){ 615 // explicit flow control 616 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 617 hci_connection_t * connection = (hci_connection_t *) it; 618 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 619 num_sco_packets_sent += connection->num_packets_sent; 620 } 621 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 622 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 623 return 0; 624 } 625 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 626 } else { 627 // implicit flow control -- TODO 628 int num_ready = 0; 629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 630 hci_connection_t * connection = (hci_connection_t *) it; 631 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 632 if (connection->sco_tx_ready == 0) continue; 633 num_ready++; 634 } 635 return num_ready; 636 } 637 } 638 #endif 639 640 // only used to send HCI Host Number Completed Packets 641 static int hci_can_send_comand_packet_transport(void){ 642 if (hci_stack->hci_packet_buffer_reserved) return 0; 643 644 // check for async hci transport implementations 645 if (hci_stack->hci_transport->can_send_packet_now){ 646 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 647 return 0; 648 } 649 } 650 return 1; 651 } 652 653 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 654 bool hci_can_send_command_packet_now(void){ 655 if (hci_can_send_comand_packet_transport() == 0) return false; 656 return hci_stack->num_cmd_packets > 0u; 657 } 658 659 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 660 // check for async hci transport implementations 661 if (!hci_stack->hci_transport->can_send_packet_now) return true; 662 return hci_stack->hci_transport->can_send_packet_now(packet_type); 663 } 664 665 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 668 } 669 670 bool hci_can_send_acl_le_packet_now(void){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 673 } 674 675 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 676 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 677 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 678 } 679 680 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_acl_packet_now(con_handle); 683 } 684 685 #ifdef ENABLE_CLASSIC 686 bool hci_can_send_acl_classic_packet_now(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return false; 688 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 689 } 690 691 bool hci_can_send_prepared_sco_packet_now(void){ 692 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 693 if (hci_have_usb_transport()){ 694 return hci_stack->sco_can_send_now; 695 } else { 696 return hci_number_free_sco_slots() > 0; 697 } 698 } 699 700 bool hci_can_send_sco_packet_now(void){ 701 if (hci_stack->hci_packet_buffer_reserved) return false; 702 return hci_can_send_prepared_sco_packet_now(); 703 } 704 705 void hci_request_sco_can_send_now_event(void){ 706 hci_stack->sco_waiting_for_can_send_now = 1; 707 hci_notify_if_sco_can_send_now(); 708 } 709 #endif 710 711 // used for internal checks in l2cap.c 712 bool hci_is_packet_buffer_reserved(void){ 713 return hci_stack->hci_packet_buffer_reserved; 714 } 715 716 // reserves outgoing packet buffer. 717 // @return 1 if successful 718 bool hci_reserve_packet_buffer(void){ 719 if (hci_stack->hci_packet_buffer_reserved) { 720 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 721 return false; 722 } 723 hci_stack->hci_packet_buffer_reserved = true; 724 return true; 725 } 726 727 void hci_release_packet_buffer(void){ 728 hci_stack->hci_packet_buffer_reserved = false; 729 } 730 731 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 732 static int hci_transport_synchronous(void){ 733 return hci_stack->hci_transport->can_send_packet_now == NULL; 734 } 735 736 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 737 738 // 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); 739 740 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 741 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 742 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 743 max_acl_data_packet_length = hci_stack->le_data_packets_length; 744 } 745 746 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 747 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 748 max_acl_data_packet_length = connection->le_max_tx_octets; 749 } 750 #endif 751 752 log_debug("hci_send_acl_packet_fragments entered"); 753 754 uint8_t status = ERROR_CODE_SUCCESS; 755 // multiple packets could be send on a synchronous HCI transport 756 while (true){ 757 758 log_debug("hci_send_acl_packet_fragments loop entered"); 759 760 // get current data 761 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 762 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 763 bool more_fragments = false; 764 765 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 766 if (current_acl_data_packet_length > max_acl_data_packet_length){ 767 more_fragments = true; 768 current_acl_data_packet_length = max_acl_data_packet_length; 769 } 770 771 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 772 if (acl_header_pos > 0u){ 773 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 774 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 775 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 776 } 777 778 // update header len 779 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 780 781 // count packet 782 connection->num_packets_sent++; 783 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 784 785 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 786 if (more_fragments){ 787 // update start of next fragment to send 788 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 789 } else { 790 // done 791 hci_stack->acl_fragmentation_pos = 0; 792 hci_stack->acl_fragmentation_total_size = 0; 793 } 794 795 // send packet 796 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 797 const int size = current_acl_data_packet_length + 4; 798 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 799 hci_stack->acl_fragmentation_tx_active = 1; 800 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 801 if (err != 0){ 802 // no error from HCI Transport expected 803 status = ERROR_CODE_HARDWARE_FAILURE; 804 } 805 806 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 807 808 // done yet? 809 if (!more_fragments) break; 810 811 // can send more? 812 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 813 } 814 815 log_debug("hci_send_acl_packet_fragments loop over"); 816 817 // release buffer now for synchronous transport 818 if (hci_transport_synchronous()){ 819 hci_stack->acl_fragmentation_tx_active = 0; 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 } 823 824 return status; 825 } 826 827 // pre: caller has reserved the packet buffer 828 uint8_t hci_send_acl_packet_buffer(int size){ 829 btstack_assert(hci_stack->hci_packet_buffer_reserved); 830 831 uint8_t * packet = hci_stack->hci_packet_buffer; 832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 833 834 // check for free places on Bluetooth module 835 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 836 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 return BTSTACK_ACL_BUFFERS_FULL; 840 } 841 842 hci_connection_t *connection = hci_connection_for_handle( con_handle); 843 if (!connection) { 844 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 845 hci_release_packet_buffer(); 846 hci_emit_transport_packet_sent(); 847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 848 } 849 850 #ifdef ENABLE_CLASSIC 851 hci_connection_timestamp(connection); 852 #endif 853 854 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 855 856 // setup data 857 hci_stack->acl_fragmentation_total_size = size; 858 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 859 860 return hci_send_acl_packet_fragments(connection); 861 } 862 863 #ifdef ENABLE_CLASSIC 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_sco_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 870 // skip checks in loopback mode 871 if (!hci_stack->loopback_mode){ 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_sco_packet_now()) { 876 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 // track send packet in connection struct 883 hci_connection_t *connection = hci_connection_for_handle( con_handle); 884 if (!connection) { 885 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 889 } 890 891 if (hci_have_usb_transport()){ 892 // token used 893 hci_stack->sco_can_send_now = false; 894 } else { 895 if (hci_stack->synchronous_flow_control_enabled){ 896 connection->num_packets_sent++; 897 } else { 898 connection->sco_tx_ready--; 899 } 900 } 901 } 902 903 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 904 905 #ifdef HAVE_SCO_TRANSPORT 906 hci_stack->sco_transport->send_packet(packet, size); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 910 return 0; 911 #else 912 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 913 if (hci_transport_synchronous()){ 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 } 917 918 if (err != 0){ 919 return ERROR_CODE_HARDWARE_FAILURE; 920 } 921 return ERROR_CODE_SUCCESS; 922 #endif 923 } 924 #endif 925 926 static void acl_handler(uint8_t *packet, uint16_t size){ 927 928 // get info 929 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 930 hci_connection_t *conn = hci_connection_for_handle(con_handle); 931 uint8_t acl_flags = READ_ACL_FLAGS(packet); 932 uint16_t acl_length = READ_ACL_LENGTH(packet); 933 934 // ignore non-registered handle 935 if (!conn){ 936 log_error("acl_handler called with non-registered handle %u!" , con_handle); 937 return; 938 } 939 940 // assert packet is complete 941 if ((acl_length + 4u) != size){ 942 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 943 return; 944 } 945 946 #ifdef ENABLE_CLASSIC 947 // update idle timestamp 948 hci_connection_timestamp(conn); 949 #endif 950 951 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 952 hci_stack->host_completed_packets = 1; 953 conn->num_packets_completed++; 954 #endif 955 956 // handle different packet types 957 switch (acl_flags & 0x03u) { 958 959 case 0x01: // continuation fragment 960 961 // sanity checks 962 if (conn->acl_recombination_pos == 0u) { 963 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 964 return; 965 } 966 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 967 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 968 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 969 conn->acl_recombination_pos = 0; 970 return; 971 } 972 973 // append fragment payload (header already stored) 974 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 975 &packet[4], acl_length); 976 conn->acl_recombination_pos += acl_length; 977 978 // forward complete L2CAP packet if complete. 979 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 980 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 981 // reset recombination buffer 982 conn->acl_recombination_length = 0; 983 conn->acl_recombination_pos = 0; 984 } 985 break; 986 987 case 0x02: { // first fragment 988 989 // sanity check 990 if (conn->acl_recombination_pos) { 991 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 992 conn->acl_recombination_pos = 0; 993 } 994 995 // peek into L2CAP packet! 996 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 997 998 // compare fragment size to L2CAP packet size 999 if (acl_length >= (l2cap_length + 4u)){ 1000 // forward fragment as L2CAP packet 1001 hci_emit_acl_packet(packet, acl_length + 4u); 1002 } else { 1003 1004 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1005 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1006 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1007 return; 1008 } 1009 1010 // store first fragment and tweak acl length for complete package 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1012 packet, acl_length + 4u); 1013 conn->acl_recombination_pos = acl_length + 4u; 1014 conn->acl_recombination_length = l2cap_length; 1015 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1016 } 1017 break; 1018 1019 } 1020 default: 1021 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1022 return; 1023 } 1024 1025 // execute main loop 1026 hci_run(); 1027 } 1028 1029 static void hci_connection_stop_timer(hci_connection_t * conn){ 1030 btstack_run_loop_remove_timer(&conn->timeout); 1031 #ifdef ENABLE_CLASSIC 1032 btstack_run_loop_remove_timer(&conn->timeout_sco); 1033 #endif 1034 } 1035 1036 static void hci_shutdown_connection(hci_connection_t *conn){ 1037 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1038 1039 #ifdef ENABLE_CLASSIC 1040 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1041 bd_addr_type_t addr_type = conn->address_type; 1042 #endif 1043 #ifdef HAVE_SCO_TRANSPORT 1044 hci_con_handle_t con_handle = conn->con_handle; 1045 #endif 1046 #endif 1047 1048 hci_connection_stop_timer(conn); 1049 1050 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1051 btstack_memory_hci_connection_free( conn ); 1052 1053 // now it's gone 1054 hci_emit_nr_connections_changed(); 1055 1056 #ifdef ENABLE_CLASSIC 1057 #ifdef ENABLE_SCO_OVER_HCI 1058 // update SCO 1059 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1060 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1061 } 1062 #endif 1063 #ifdef HAVE_SCO_TRANSPORT 1064 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1065 hci_stack->sco_transport->close(con_handle); 1066 } 1067 #endif 1068 #endif 1069 } 1070 1071 #ifdef ENABLE_CLASSIC 1072 1073 static const uint16_t packet_type_sizes[] = { 1074 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1075 HCI_ACL_DH1_SIZE, 0, 0, 0, 1076 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1077 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1078 }; 1079 static const uint8_t packet_type_feature_requirement_bit[] = { 1080 0, // 3 slot packets 1081 1, // 5 slot packets 1082 25, // EDR 2 mpbs 1083 26, // EDR 3 mbps 1084 39, // 3 slot EDR packts 1085 40, // 5 slot EDR packet 1086 }; 1087 static const uint16_t packet_type_feature_packet_mask[] = { 1088 0x0f00, // 3 slot packets 1089 0xf000, // 5 slot packets 1090 0x1102, // EDR 2 mpbs 1091 0x2204, // EDR 3 mbps 1092 0x0300, // 3 slot EDR packts 1093 0x3000, // 5 slot EDR packet 1094 }; 1095 1096 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1097 // enable packet types based on size 1098 uint16_t packet_types = 0; 1099 unsigned int i; 1100 for (i=0;i<16;i++){ 1101 if (packet_type_sizes[i] == 0) continue; 1102 if (packet_type_sizes[i] <= buffer_size){ 1103 packet_types |= 1 << i; 1104 } 1105 } 1106 // disable packet types due to missing local supported features 1107 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1108 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1109 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1110 if (feature_set) continue; 1111 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1112 packet_types &= ~packet_type_feature_packet_mask[i]; 1113 } 1114 // flip bits for "may not be used" 1115 packet_types ^= 0x3306; 1116 return packet_types; 1117 } 1118 1119 uint16_t hci_usable_acl_packet_types(void){ 1120 return hci_stack->packet_types; 1121 } 1122 #endif 1123 1124 uint8_t* hci_get_outgoing_packet_buffer(void){ 1125 // hci packet buffer is >= acl data packet length 1126 return hci_stack->hci_packet_buffer; 1127 } 1128 1129 uint16_t hci_max_acl_data_packet_length(void){ 1130 return hci_stack->acl_data_packet_length; 1131 } 1132 1133 #ifdef ENABLE_CLASSIC 1134 bool hci_extended_sco_link_supported(void){ 1135 // No. 31, byte 3, bit 7 1136 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1137 } 1138 #endif 1139 1140 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1141 // No. 54, byte 6, bit 6 1142 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1143 } 1144 1145 #ifdef ENABLE_CLASSIC 1146 static int gap_ssp_supported(void){ 1147 // No. 51, byte 6, bit 3 1148 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1149 } 1150 #endif 1151 1152 static int hci_classic_supported(void){ 1153 #ifdef ENABLE_CLASSIC 1154 // No. 37, byte 4, bit 5, = No BR/EDR Support 1155 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1156 #else 1157 return 0; 1158 #endif 1159 } 1160 1161 static int hci_le_supported(void){ 1162 #ifdef ENABLE_BLE 1163 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1164 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1165 #else 1166 return 0; 1167 #endif 1168 } 1169 1170 #ifdef ENABLE_BLE 1171 1172 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1173 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1174 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1175 } else { 1176 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1177 } 1178 } 1179 1180 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1181 *addr_type = hci_stack->le_own_addr_type; 1182 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1183 } 1184 1185 #ifdef ENABLE_LE_PERIPHERAL 1186 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1187 *addr_type = hci_stack->le_advertisements_own_addr_type; 1188 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1189 }; 1190 #endif 1191 1192 #ifdef ENABLE_LE_CENTRAL 1193 1194 /** 1195 * @brief Get own addr type and address used for LE connections (Central) 1196 */ 1197 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1198 *addr_type = hci_stack->le_connection_own_addr_type; 1199 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1200 } 1201 1202 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1203 1204 int offset = 3; 1205 int num_reports = packet[offset]; 1206 offset += 1; 1207 1208 int i; 1209 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1210 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1211 for (i=0; (i<num_reports) && (offset < size);i++){ 1212 // sanity checks on data_length: 1213 uint8_t data_length = packet[offset + 8]; 1214 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1215 if ((offset + 9u + data_length + 1u) > size) return; 1216 // setup event 1217 uint8_t event_size = 10u + data_length; 1218 int pos = 0; 1219 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1220 event[pos++] = event_size; 1221 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1222 offset += 8; 1223 pos += 8; 1224 event[pos++] = packet[offset + 1 + data_length]; // rssi 1225 event[pos++] = data_length; 1226 offset++; 1227 (void)memcpy(&event[pos], &packet[offset], data_length); 1228 pos += data_length; 1229 offset += data_length + 1u; // rssi 1230 hci_emit_event(event, pos, 1); 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #ifdef ENABLE_BLE 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 static void hci_update_advertisements_enabled_for_current_roles(void){ 1239 if (hci_stack->le_advertisements_enabled){ 1240 // get number of active le slave connections 1241 int num_slave_connections = 0; 1242 btstack_linked_list_iterator_t it; 1243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1244 while (btstack_linked_list_iterator_has_next(&it)){ 1245 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1246 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1247 if (con->state != OPEN) continue; 1248 if (con->role != HCI_ROLE_SLAVE) continue; 1249 if (!hci_is_le_connection(con)) continue; 1250 num_slave_connections++; 1251 } 1252 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1253 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1254 } else { 1255 hci_stack->le_advertisements_enabled_for_current_roles = false; 1256 } 1257 } 1258 #endif 1259 #endif 1260 1261 #ifdef ENABLE_CLASSIC 1262 static void gap_run_set_local_name(void){ 1263 hci_reserve_packet_buffer(); 1264 uint8_t * packet = hci_stack->hci_packet_buffer; 1265 // construct HCI Command and send 1266 uint16_t opcode = hci_write_local_name.opcode; 1267 hci_stack->last_cmd_opcode = opcode; 1268 packet[0] = opcode & 0xff; 1269 packet[1] = opcode >> 8; 1270 packet[2] = DEVICE_NAME_LEN; 1271 memset(&packet[3], 0, DEVICE_NAME_LEN); 1272 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1273 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1274 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1275 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1276 // expand '00:00:00:00:00:00' in name with bd_addr 1277 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1278 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1279 } 1280 1281 static void gap_run_set_eir_data(void){ 1282 hci_reserve_packet_buffer(); 1283 uint8_t * packet = hci_stack->hci_packet_buffer; 1284 // construct HCI Command in-place and send 1285 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1286 hci_stack->last_cmd_opcode = opcode; 1287 uint16_t offset = 0; 1288 packet[offset++] = opcode & 0xff; 1289 packet[offset++] = opcode >> 8; 1290 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1291 packet[offset++] = 0; // FEC not required 1292 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1293 if (hci_stack->eir_data){ 1294 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1295 ad_context_t context; 1296 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1297 uint8_t data_type = ad_iterator_get_data_type(&context); 1298 uint8_t size = ad_iterator_get_data_len(&context); 1299 const uint8_t *data = ad_iterator_get_data(&context); 1300 // copy item 1301 packet[offset++] = size + 1; 1302 packet[offset++] = data_type; 1303 memcpy(&packet[offset], data, size); 1304 // update name item 1305 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1306 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1307 } 1308 offset += size; 1309 } 1310 } else { 1311 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1312 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1313 packet[offset++] = bytes_to_copy + 1; 1314 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1315 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1316 // expand '00:00:00:00:00:00' in name with bd_addr 1317 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1318 } 1319 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1320 } 1321 1322 static void hci_run_gap_tasks_classic(void){ 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1325 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1330 gap_run_set_local_name(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1335 gap_run_set_eir_data(); 1336 return; 1337 } 1338 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1339 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1340 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1341 return; 1342 } 1343 // write page scan activity 1344 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1345 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1346 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1347 return; 1348 } 1349 // write page scan type 1350 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1351 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1352 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1353 return; 1354 } 1355 // write page timeout 1356 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1357 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1358 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1359 return; 1360 } 1361 // send scan enable 1362 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1363 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1364 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1365 return; 1366 } 1367 // send write scan activity 1368 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1369 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1370 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1371 return; 1372 } 1373 } 1374 #endif 1375 1376 #ifndef HAVE_HOST_CONTROLLER_API 1377 1378 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1379 if (!hci_stack->config) return 0; 1380 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1381 // Limit baud rate for Broadcom chipsets to 3 mbps 1382 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1383 baud_rate = 3000000; 1384 } 1385 return baud_rate; 1386 } 1387 1388 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1389 UNUSED(ds); 1390 1391 switch (hci_stack->substate){ 1392 case HCI_INIT_W4_SEND_RESET: 1393 log_info("Resend HCI Reset"); 1394 hci_stack->substate = HCI_INIT_SEND_RESET; 1395 hci_stack->num_cmd_packets = 1; 1396 hci_run(); 1397 break; 1398 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1399 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1400 if (hci_stack->hci_transport->reset_link){ 1401 hci_stack->hci_transport->reset_link(); 1402 } 1403 1404 /* fall through */ 1405 1406 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1407 log_info("Resend HCI Reset - CSR Warm Boot"); 1408 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1409 hci_stack->num_cmd_packets = 1; 1410 hci_run(); 1411 break; 1412 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1413 if (hci_stack->hci_transport->set_baudrate){ 1414 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1415 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1416 hci_stack->hci_transport->set_baudrate(baud_rate); 1417 } 1418 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1419 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1420 if (hci_stack->hci_transport->reset_link){ 1421 log_info("Link Reset"); 1422 hci_stack->hci_transport->reset_link(); 1423 } 1424 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1425 hci_run(); 1426 } 1427 break; 1428 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1429 // otherwise continue 1430 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1431 hci_send_cmd(&hci_read_local_supported_commands); 1432 break; 1433 default: 1434 break; 1435 } 1436 } 1437 #endif 1438 1439 static void hci_initializing_next_state(void){ 1440 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1441 } 1442 1443 static void hci_init_done(void){ 1444 // done. tell the app 1445 log_info("hci_init_done -> HCI_STATE_WORKING"); 1446 hci_stack->state = HCI_STATE_WORKING; 1447 hci_emit_state(); 1448 } 1449 1450 // assumption: hci_can_send_command_packet_now() == true 1451 static void hci_initializing_run(void){ 1452 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1453 1454 #ifndef HAVE_HOST_CONTROLLER_API 1455 bool need_baud_change = hci_stack->config 1456 && hci_stack->chipset 1457 && hci_stack->chipset->set_baudrate_command 1458 && hci_stack->hci_transport->set_baudrate 1459 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1460 #endif 1461 1462 switch (hci_stack->substate){ 1463 case HCI_INIT_SEND_RESET: 1464 hci_state_reset(); 1465 1466 #ifndef HAVE_HOST_CONTROLLER_API 1467 // prepare reset if command complete not received in 100ms 1468 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1469 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1470 btstack_run_loop_add_timer(&hci_stack->timeout); 1471 #endif 1472 // send command 1473 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1474 hci_send_cmd(&hci_reset); 1475 break; 1476 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1477 hci_send_cmd(&hci_read_local_version_information); 1478 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1479 break; 1480 1481 #ifndef HAVE_HOST_CONTROLLER_API 1482 case HCI_INIT_SEND_READ_LOCAL_NAME: 1483 hci_send_cmd(&hci_read_local_name); 1484 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1485 break; 1486 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1487 hci_state_reset(); 1488 // prepare reset if command complete not received in 100ms 1489 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1490 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1491 btstack_run_loop_add_timer(&hci_stack->timeout); 1492 // send command 1493 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1494 hci_send_cmd(&hci_reset); 1495 break; 1496 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1497 hci_state_reset(); 1498 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1499 hci_send_cmd(&hci_reset); 1500 break; 1501 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1502 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1503 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1504 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1505 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1506 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1507 break; 1508 } 1509 case HCI_INIT_SET_BD_ADDR: 1510 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1511 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1512 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1513 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1514 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1515 break; 1516 case HCI_INIT_SEND_BAUD_CHANGE: 1517 if (need_baud_change) { 1518 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1519 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1520 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1521 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1522 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1523 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1524 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1525 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1526 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1527 btstack_run_loop_add_timer(&hci_stack->timeout); 1528 } 1529 break; 1530 } 1531 1532 /* fall through */ 1533 1534 case HCI_INIT_CUSTOM_INIT: 1535 // Custom initialization 1536 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1537 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1538 bool send_cmd = false; 1539 switch (hci_stack->chipset_result){ 1540 case BTSTACK_CHIPSET_VALID_COMMAND: 1541 send_cmd = true; 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1543 break; 1544 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1545 send_cmd = true; 1546 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1547 log_info("CSR Warm Boot"); 1548 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1549 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1550 btstack_run_loop_add_timer(&hci_stack->timeout); 1551 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1552 && hci_stack->config 1553 && hci_stack->chipset 1554 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1555 && hci_stack->hci_transport->set_baudrate 1556 && hci_transport_uart_get_main_baud_rate()){ 1557 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1558 } else { 1559 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1560 } 1561 break; 1562 default: 1563 break; 1564 } 1565 1566 if (send_cmd){ 1567 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1568 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1569 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1570 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1571 break; 1572 } 1573 log_info("Init script done"); 1574 1575 // Init script download on Broadcom chipsets causes: 1576 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1577 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1578 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1579 1580 // - baud rate to reset, restore UART baud rate if needed 1581 if (need_baud_change) { 1582 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1583 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1584 hci_stack->hci_transport->set_baudrate(baud_rate); 1585 } 1586 1587 uint16_t bcm_delay_ms = 300; 1588 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1589 // -> Work around: wait here. 1590 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1591 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1592 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1593 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1594 btstack_run_loop_add_timer(&hci_stack->timeout); 1595 break; 1596 } 1597 } 1598 #endif 1599 /* fall through */ 1600 1601 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1602 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1603 hci_send_cmd(&hci_read_local_supported_commands); 1604 break; 1605 case HCI_INIT_READ_BD_ADDR: 1606 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1607 hci_send_cmd(&hci_read_bd_addr); 1608 break; 1609 case HCI_INIT_READ_BUFFER_SIZE: 1610 // only read buffer size if supported 1611 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1612 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1613 hci_send_cmd(&hci_read_buffer_size); 1614 break; 1615 } 1616 1617 /* fall through */ 1618 1619 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1620 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1621 hci_send_cmd(&hci_read_local_supported_features); 1622 break; 1623 1624 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1625 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1626 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1627 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1628 break; 1629 case HCI_INIT_HOST_BUFFER_SIZE: 1630 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1631 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1632 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1633 break; 1634 #endif 1635 1636 case HCI_INIT_SET_EVENT_MASK: 1637 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1638 if (hci_le_supported()){ 1639 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1640 } else { 1641 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1642 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1643 } 1644 break; 1645 1646 #ifdef ENABLE_CLASSIC 1647 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1648 if (hci_classic_supported() && gap_ssp_supported()){ 1649 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1650 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1651 break; 1652 } 1653 1654 /* fall through */ 1655 1656 case HCI_INIT_WRITE_INQUIRY_MODE: 1657 if (hci_classic_supported()){ 1658 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1659 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1660 break; 1661 } 1662 1663 /* fall through */ 1664 1665 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1666 // skip write secure connections host support if not supported or disabled 1667 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1668 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1669 hci_stack->secure_connections_active = true; 1670 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1671 break; 1672 } 1673 1674 #ifdef ENABLE_SCO_OVER_HCI 1675 /* fall through */ 1676 1677 // only sent if ENABLE_SCO_OVER_HCI is defined 1678 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1679 // skip write synchronous flow control if not supported 1680 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1681 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1682 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1683 break; 1684 } 1685 /* fall through */ 1686 1687 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1688 // skip write default erroneous data reporting if not supported 1689 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1690 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1691 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1692 break; 1693 } 1694 #endif 1695 1696 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1697 /* fall through */ 1698 1699 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1700 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1701 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1702 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1703 #ifdef ENABLE_SCO_OVER_HCI 1704 log_info("BCM: Route SCO data via HCI transport"); 1705 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1706 #endif 1707 #ifdef ENABLE_SCO_OVER_PCM 1708 log_info("BCM: Route SCO data via PCM interface"); 1709 #ifdef ENABLE_BCM_PCM_WBS 1710 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1711 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1712 #else 1713 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1714 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1715 #endif 1716 #endif 1717 break; 1718 } 1719 #endif 1720 1721 #ifdef ENABLE_SCO_OVER_PCM 1722 /* fall through */ 1723 1724 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1725 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1726 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1727 log_info("BCM: Config PCM interface for I2S"); 1728 #ifdef ENABLE_BCM_PCM_WBS 1729 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1730 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1731 #else 1732 // 256 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, 1); 1734 #endif 1735 break; 1736 } 1737 #endif 1738 #endif 1739 1740 #ifdef ENABLE_BLE 1741 /* fall through */ 1742 1743 // LE INIT 1744 case HCI_INIT_LE_READ_BUFFER_SIZE: 1745 if (hci_le_supported()){ 1746 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1747 hci_send_cmd(&hci_le_read_buffer_size); 1748 break; 1749 } 1750 1751 /* fall through */ 1752 1753 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1754 // skip write le host if not supported (e.g. on LE only EM9301) 1755 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1756 // LE Supported Host = 1, Simultaneous Host = 0 1757 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1758 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1759 break; 1760 } 1761 1762 /* fall through */ 1763 1764 case HCI_INIT_LE_SET_EVENT_MASK: 1765 if (hci_le_supported()){ 1766 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1767 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1768 break; 1769 } 1770 #endif 1771 1772 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1773 /* fall through */ 1774 1775 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1776 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1777 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1778 hci_send_cmd(&hci_le_read_maximum_data_length); 1779 break; 1780 } 1781 1782 /* fall through */ 1783 1784 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1785 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1786 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1787 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1788 break; 1789 } 1790 #endif 1791 1792 #ifdef ENABLE_LE_CENTRAL 1793 /* fall through */ 1794 1795 case HCI_INIT_READ_WHITE_LIST_SIZE: 1796 if (hci_le_supported()){ 1797 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1798 hci_send_cmd(&hci_le_read_white_list_size); 1799 break; 1800 } 1801 1802 /* fall through */ 1803 1804 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1805 if (hci_le_supported()){ 1806 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1807 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1808 break; 1809 } 1810 #endif 1811 1812 /* fall through */ 1813 1814 case HCI_INIT_DONE: 1815 hci_stack->substate = HCI_INIT_DONE; 1816 #ifdef ENABLE_CLASSIC 1817 // init sequence complete, check if GAP Tasks are completed 1818 if (hci_stack->gap_tasks != 0) { 1819 hci_run_gap_tasks_classic(); 1820 break; 1821 } 1822 #endif 1823 hci_init_done(); 1824 break; 1825 1826 default: 1827 return; 1828 } 1829 } 1830 1831 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1832 bool command_completed = false; 1833 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1834 uint16_t opcode = little_endian_read_16(packet,3); 1835 if (opcode == hci_stack->last_cmd_opcode){ 1836 command_completed = true; 1837 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1838 } else { 1839 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1840 } 1841 } 1842 1843 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1844 uint8_t status = packet[2]; 1845 uint16_t opcode = little_endian_read_16(packet,4); 1846 if (opcode == hci_stack->last_cmd_opcode){ 1847 if (status){ 1848 command_completed = true; 1849 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1850 } else { 1851 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1852 } 1853 } else { 1854 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1855 } 1856 } 1857 #ifndef HAVE_HOST_CONTROLLER_API 1858 // Vendor == CSR 1859 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1860 // TODO: track actual command 1861 command_completed = true; 1862 } 1863 1864 // Vendor == Toshiba 1865 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1866 // TODO: track actual command 1867 command_completed = true; 1868 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1869 hci_stack->num_cmd_packets = 1; 1870 } 1871 #endif 1872 1873 return command_completed; 1874 } 1875 1876 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1877 1878 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1879 1880 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1881 1882 #ifndef HAVE_HOST_CONTROLLER_API 1883 1884 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1885 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1886 // 1887 // HCI Reset 1888 // Timeout 100 ms 1889 // HCI Reset 1890 // Command Complete Reset 1891 // HCI Read Local Version Information 1892 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1893 // hang... 1894 // 1895 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1896 if (!command_completed 1897 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1898 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1899 1900 uint16_t opcode = little_endian_read_16(packet,3); 1901 if (opcode == hci_reset.opcode){ 1902 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1903 return; 1904 } 1905 } 1906 1907 // CSR & H5 1908 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1909 if (!command_completed 1910 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1911 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1912 1913 uint16_t opcode = little_endian_read_16(packet,3); 1914 if (opcode == hci_reset.opcode){ 1915 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1916 return; 1917 } 1918 } 1919 1920 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1921 // fix: Correct substate and behave as command below 1922 if (command_completed){ 1923 switch (hci_stack->substate){ 1924 case HCI_INIT_SEND_RESET: 1925 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1926 break; 1927 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1928 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1929 break; 1930 default: 1931 break; 1932 } 1933 } 1934 1935 #endif 1936 1937 if (!command_completed) return; 1938 1939 bool need_baud_change = false; 1940 bool need_addr_change = false; 1941 1942 #ifndef HAVE_HOST_CONTROLLER_API 1943 need_baud_change = hci_stack->config 1944 && hci_stack->chipset 1945 && hci_stack->chipset->set_baudrate_command 1946 && hci_stack->hci_transport->set_baudrate 1947 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1948 1949 need_addr_change = hci_stack->custom_bd_addr_set 1950 && hci_stack->chipset 1951 && hci_stack->chipset->set_bd_addr_command; 1952 #endif 1953 1954 switch(hci_stack->substate){ 1955 1956 #ifndef HAVE_HOST_CONTROLLER_API 1957 case HCI_INIT_SEND_RESET: 1958 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1959 // fix: just correct substate and behave as command below 1960 1961 /* fall through */ 1962 #endif 1963 1964 case HCI_INIT_W4_SEND_RESET: 1965 btstack_run_loop_remove_timer(&hci_stack->timeout); 1966 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1967 return; 1968 1969 #ifndef HAVE_HOST_CONTROLLER_API 1970 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1971 // for STLC2500D, baud rate change already happened. 1972 // for others, baud rate gets changed now 1973 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1974 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1975 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1976 hci_stack->hci_transport->set_baudrate(baud_rate); 1977 } 1978 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1979 return; 1980 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1981 btstack_run_loop_remove_timer(&hci_stack->timeout); 1982 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1983 return; 1984 case HCI_INIT_W4_CUSTOM_INIT: 1985 // repeat custom init 1986 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1987 return; 1988 #endif 1989 1990 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1991 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1992 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1993 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1994 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1995 return; 1996 } 1997 if (need_addr_change){ 1998 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1999 return; 2000 } 2001 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2002 return; 2003 #ifndef HAVE_HOST_CONTROLLER_API 2004 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2005 if (need_baud_change){ 2006 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2007 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2008 hci_stack->hci_transport->set_baudrate(baud_rate); 2009 } 2010 if (need_addr_change){ 2011 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2012 return; 2013 } 2014 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2015 return; 2016 case HCI_INIT_W4_SET_BD_ADDR: 2017 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2018 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2019 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2020 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2021 return; 2022 } 2023 // skipping st warm boot 2024 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2025 return; 2026 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2027 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2028 return; 2029 #endif 2030 2031 case HCI_INIT_DONE: 2032 // set state if we came here by fall through 2033 hci_stack->substate = HCI_INIT_DONE; 2034 return; 2035 2036 default: 2037 break; 2038 } 2039 hci_initializing_next_state(); 2040 } 2041 2042 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2043 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2044 bd_addr_t bd_address; 2045 (void)memcpy(&bd_address, conn->address, 6); 2046 2047 #ifdef ENABLE_CLASSIC 2048 // cache needed data 2049 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2050 #endif 2051 2052 // connection failed, remove entry 2053 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2054 btstack_memory_hci_connection_free( conn ); 2055 2056 #ifdef ENABLE_CLASSIC 2057 // notify client if dedicated bonding 2058 if (notify_dedicated_bonding_failed){ 2059 log_info("hci notify_dedicated_bonding_failed"); 2060 hci_emit_dedicated_bonding_result(bd_address, status); 2061 } 2062 2063 // if authentication error, also delete link key 2064 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2065 gap_drop_link_key_for_bd_addr(bd_address); 2066 } 2067 #else 2068 UNUSED(status); 2069 #endif 2070 } 2071 2072 #ifdef ENABLE_CLASSIC 2073 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2074 // SSP Controller 2075 if (features[6] & (1 << 3)){ 2076 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2077 } 2078 // eSCO 2079 if (features[3] & (1<<7)){ 2080 conn->remote_supported_features[0] |= 1; 2081 } 2082 // Extended features 2083 if (features[7] & (1<<7)){ 2084 conn->remote_supported_features[0] |= 2; 2085 } 2086 } 2087 2088 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2089 // SSP Host 2090 if (features[0] & (1 << 0)){ 2091 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2092 } 2093 // SC Host 2094 if (features[0] & (1 << 3)){ 2095 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2096 } 2097 } 2098 2099 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2100 // SC Controller 2101 if (features[1] & (1 << 0)){ 2102 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2103 } 2104 } 2105 2106 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2107 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2108 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2109 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2110 if (conn->bonding_flags & BONDING_DEDICATED){ 2111 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2112 } 2113 } 2114 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2115 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2116 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2117 } 2118 2119 #endif 2120 2121 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2122 // handle BT initialization 2123 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2124 hci_initializing_event_handler(packet, size); 2125 } 2126 2127 // help with BT sleep 2128 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2129 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2130 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2131 hci_initializing_next_state(); 2132 } 2133 } 2134 2135 #ifdef ENABLE_CLASSIC 2136 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2137 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2138 conn->encryption_key_size = encryption_key_size; 2139 2140 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2141 conn->requested_security_level = LEVEL_0; 2142 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2143 return; 2144 } 2145 2146 // Request remote features if not already done 2147 hci_trigger_remote_features_for_connection(conn); 2148 2149 // Request Authentication if not already done 2150 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2151 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2152 } 2153 #endif 2154 2155 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2156 UNUSED(size); 2157 2158 uint16_t manufacturer; 2159 #ifdef ENABLE_CLASSIC 2160 hci_con_handle_t handle; 2161 hci_connection_t * conn; 2162 uint8_t status; 2163 #endif 2164 // get num cmd packets - limit to 1 to reduce complexity 2165 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2166 2167 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2168 switch (opcode){ 2169 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2170 if (packet[5]) break; 2171 // terminate, name 248 chars 2172 packet[6+248] = 0; 2173 log_info("local name: %s", &packet[6]); 2174 break; 2175 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2176 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2177 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2178 uint16_t acl_len = little_endian_read_16(packet, 6); 2179 uint16_t sco_len = packet[8]; 2180 2181 // determine usable ACL/SCO payload size 2182 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2183 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2184 2185 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2186 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2187 2188 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2189 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2190 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2191 } 2192 break; 2193 case HCI_OPCODE_HCI_READ_RSSI: 2194 if (packet[5] == ERROR_CODE_SUCCESS){ 2195 uint8_t event[5]; 2196 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2197 event[1] = 3; 2198 (void)memcpy(&event[2], &packet[6], 3); 2199 hci_emit_event(event, sizeof(event), 1); 2200 } 2201 break; 2202 #ifdef ENABLE_BLE 2203 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2204 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2205 hci_stack->le_acl_packets_total_num = packet[8]; 2206 // determine usable ACL payload size 2207 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2208 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2209 } 2210 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2211 break; 2212 #endif 2213 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2214 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2215 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2216 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2217 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); 2218 break; 2219 #endif 2220 #ifdef ENABLE_LE_CENTRAL 2221 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2222 hci_stack->le_whitelist_capacity = packet[6]; 2223 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2224 break; 2225 #endif 2226 case HCI_OPCODE_HCI_READ_BD_ADDR: 2227 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2228 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)); 2229 #ifdef ENABLE_CLASSIC 2230 if (hci_stack->link_key_db){ 2231 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2232 } 2233 #endif 2234 break; 2235 #ifdef ENABLE_CLASSIC 2236 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2237 hci_emit_discoverable_enabled(hci_stack->discoverable); 2238 break; 2239 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2240 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2241 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2242 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2243 hci_emit_event(event, sizeof(event), 1); 2244 } 2245 break; 2246 #endif 2247 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2248 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2249 2250 #ifdef ENABLE_CLASSIC 2251 // determine usable ACL packet types based on host buffer size and supported features 2252 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2253 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2254 #endif 2255 // Classic/LE 2256 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2257 break; 2258 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2259 manufacturer = little_endian_read_16(packet, 10); 2260 // map Cypress to Broadcom 2261 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2262 log_info("Treat Cypress as Broadcom"); 2263 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2264 little_endian_store_16(packet, 10, manufacturer); 2265 } 2266 hci_stack->manufacturer = manufacturer; 2267 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2268 break; 2269 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2270 hci_stack->local_supported_commands[0] = 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2279 hci_stack->local_supported_commands[1] = 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2283 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2284 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2285 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2286 break; 2287 #ifdef ENABLE_CLASSIC 2288 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2289 if (packet[5]) return; 2290 hci_stack->synchronous_flow_control_enabled = 1; 2291 break; 2292 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2293 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2294 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2295 conn = hci_connection_for_handle(handle); 2296 if (conn != NULL) { 2297 uint8_t key_size = 0; 2298 if (status == 0){ 2299 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2300 log_info("Handle %04x key Size: %u", handle, key_size); 2301 } else { 2302 key_size = 1; 2303 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2304 } 2305 hci_handle_read_encryption_key_size_complete(conn, key_size); 2306 } 2307 break; 2308 // assert pairing complete event is emitted. 2309 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2310 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2311 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2312 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2313 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2314 // lookup connection by gap pairing addr 2315 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2316 if (conn == NULL) break; 2317 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2318 break; 2319 2320 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2321 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2322 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2323 uint8_t event[67]; 2324 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2325 event[1] = 65; 2326 (void)memset(&event[2], 0, 65); 2327 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2328 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2329 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2330 event[2] = 3; 2331 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2332 } else { 2333 event[2] = 1; 2334 } 2335 } 2336 hci_emit_event(event, sizeof(event), 0); 2337 break; 2338 } 2339 2340 // note: only needed if user does not provide OOB data 2341 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2342 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2343 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2344 if (conn == NULL) break; 2345 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2346 break; 2347 #endif 2348 #endif 2349 default: 2350 break; 2351 } 2352 } 2353 2354 #ifdef ENABLE_BLE 2355 static void event_handle_le_connection_complete(const uint8_t * packet){ 2356 bd_addr_t addr; 2357 bd_addr_type_t addr_type; 2358 hci_connection_t * conn; 2359 2360 // Connection management 2361 reverse_bd_addr(&packet[8], addr); 2362 addr_type = (bd_addr_type_t)packet[7]; 2363 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2364 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2365 2366 #ifdef ENABLE_LE_CENTRAL 2367 // handle error: error is reported only to the initiator -> outgoing connection 2368 if (packet[3]){ 2369 2370 // handle cancelled outgoing connection 2371 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2372 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2373 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2374 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2375 // reset state 2376 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2377 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2378 // get outgoing connection conn struct for direct connect 2379 conn = gap_get_outgoing_connection(); 2380 } 2381 2382 // outgoing le connection establishment is done 2383 if (conn){ 2384 // remove entry 2385 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2386 btstack_memory_hci_connection_free( conn ); 2387 } 2388 return; 2389 } 2390 #endif 2391 2392 // on success, both hosts receive connection complete event 2393 if (packet[6] == HCI_ROLE_MASTER){ 2394 #ifdef ENABLE_LE_CENTRAL 2395 // if we're master on an le connection, it was an outgoing connection and we're done with it 2396 // note: no hci_connection_t object exists yet for connect with whitelist 2397 if (hci_is_le_connection_type(addr_type)){ 2398 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2399 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2400 } 2401 #endif 2402 } else { 2403 #ifdef ENABLE_LE_PERIPHERAL 2404 // if we're slave, it was an incoming connection, advertisements have stopped 2405 hci_stack->le_advertisements_active = false; 2406 #endif 2407 } 2408 2409 // LE connections are auto-accepted, so just create a connection if there isn't one already 2410 if (!conn){ 2411 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2412 } 2413 2414 // no memory, sorry. 2415 if (!conn){ 2416 return; 2417 } 2418 2419 conn->state = OPEN; 2420 conn->role = packet[6]; 2421 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2422 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2423 2424 #ifdef ENABLE_LE_PERIPHERAL 2425 if (packet[6] == HCI_ROLE_SLAVE){ 2426 hci_update_advertisements_enabled_for_current_roles(); 2427 } 2428 #endif 2429 2430 // init unenhanced att bearer mtu 2431 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2432 conn->att_connection.mtu_exchanged = false; 2433 2434 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2435 2436 // restart timer 2437 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2438 // btstack_run_loop_add_timer(&conn->timeout); 2439 2440 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2441 2442 hci_emit_nr_connections_changed(); 2443 } 2444 #endif 2445 2446 #ifdef ENABLE_CLASSIC 2447 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){ 2448 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2449 // LEVEL_4 is tested by l2cap 2450 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2451 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2452 if (level >= LEVEL_3){ 2453 // MITM not possible without keyboard or display 2454 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2455 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2456 2457 // MITM possible if one side has keyboard and the other has keyboard or display 2458 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2459 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2460 2461 // MITM not possible if one side has only display and other side has no keyboard 2462 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2463 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2464 } 2465 // LEVEL 2 requires SSP, which is a given 2466 return true; 2467 } 2468 2469 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2470 uint16_t i; 2471 for (i=0; i < size ; i++){ 2472 if (data[i] != 0) { 2473 return false; 2474 } 2475 } 2476 return true; 2477 } 2478 2479 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2480 // get requested security level 2481 gap_security_level_t requested_security_level = conn->requested_security_level; 2482 if (hci_stack->gap_secure_connections_only_mode){ 2483 requested_security_level = LEVEL_4; 2484 } 2485 2486 // assess security: LEVEL 4 requires SC 2487 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2488 if ((requested_security_level == LEVEL_4) && 2489 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2490 !hci_remote_sc_enabled(conn)){ 2491 log_info("Level 4 required, but SC not supported -> abort"); 2492 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2493 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2494 return; 2495 } 2496 2497 // assess security based on io capabilities 2498 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2499 // responder: fully validate io caps of both sides as well as OOB data 2500 bool security_possible = false; 2501 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2502 2503 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2504 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2505 // so we merge the OOB data availability 2506 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2507 if (conn->classic_oob_c_192 != NULL){ 2508 have_oob_data |= 1; 2509 } 2510 if (conn->classic_oob_c_256 != NULL){ 2511 have_oob_data |= 2; 2512 } 2513 // for up to Level 3, either P-192 as well as P-256 will do 2514 // 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 2515 // if remote does not SC, we should not receive P-256 data either 2516 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2517 security_possible = true; 2518 } 2519 // for Level 4, P-256 is needed 2520 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2521 security_possible = true; 2522 } 2523 #endif 2524 2525 if (security_possible == false){ 2526 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2527 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2528 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2529 return; 2530 } 2531 } else { 2532 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2533 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2534 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2535 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2536 log_info("Level 3+ required, but no input/output -> abort"); 2537 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2538 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2539 return; 2540 } 2541 #endif 2542 #endif 2543 } 2544 2545 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2546 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2547 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2548 } else { 2549 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2550 } 2551 #endif 2552 } 2553 2554 #endif 2555 2556 static void event_handler(uint8_t *packet, uint16_t size){ 2557 2558 uint16_t event_length = packet[1]; 2559 2560 // assert packet is complete 2561 if (size != (event_length + 2u)){ 2562 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2563 return; 2564 } 2565 2566 bd_addr_type_t addr_type; 2567 hci_con_handle_t handle; 2568 hci_connection_t * conn; 2569 int i; 2570 int create_connection_cmd; 2571 2572 #ifdef ENABLE_CLASSIC 2573 hci_link_type_t link_type; 2574 bd_addr_t addr; 2575 #endif 2576 2577 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2578 2579 switch (hci_event_packet_get_type(packet)) { 2580 2581 case HCI_EVENT_COMMAND_COMPLETE: 2582 handle_command_complete_event(packet, size); 2583 break; 2584 2585 case HCI_EVENT_COMMAND_STATUS: 2586 // get num cmd packets - limit to 1 to reduce complexity 2587 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2588 2589 // check command status to detected failed outgoing connections 2590 create_connection_cmd = 0; 2591 #ifdef ENABLE_CLASSIC 2592 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2593 create_connection_cmd = 1; 2594 } 2595 #endif 2596 #ifdef ENABLE_LE_CENTRAL 2597 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2598 create_connection_cmd = 1; 2599 } 2600 #endif 2601 if (create_connection_cmd) { 2602 uint8_t status = hci_event_command_status_get_status(packet); 2603 addr_type = hci_stack->outgoing_addr_type; 2604 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2605 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); 2606 2607 // reset outgoing address info 2608 memset(hci_stack->outgoing_addr, 0, 6); 2609 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2610 2611 // on error 2612 if (status != ERROR_CODE_SUCCESS){ 2613 #ifdef ENABLE_LE_CENTRAL 2614 if (hci_is_le_connection_type(addr_type)){ 2615 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2616 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2617 } 2618 #endif 2619 // error => outgoing connection failed 2620 if (conn != NULL){ 2621 hci_handle_connection_failed(conn, status); 2622 } 2623 } 2624 } 2625 2626 #ifdef ENABLE_CLASSIC 2627 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2628 uint8_t status = hci_event_command_status_get_status(packet); 2629 log_info("command status (inquiry), status %x", status); 2630 if (status == ERROR_CODE_SUCCESS) { 2631 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2632 } else { 2633 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2634 } 2635 } 2636 #endif 2637 break; 2638 2639 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2640 if (size < 3) return; 2641 uint16_t num_handles = packet[2]; 2642 if (size != (3u + num_handles * 4u)) return; 2643 uint16_t offset = 3; 2644 for (i=0; i<num_handles;i++){ 2645 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2646 offset += 2u; 2647 uint16_t num_packets = little_endian_read_16(packet, offset); 2648 offset += 2u; 2649 2650 conn = hci_connection_for_handle(handle); 2651 if (!conn){ 2652 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2653 continue; 2654 } 2655 2656 if (conn->num_packets_sent >= num_packets){ 2657 conn->num_packets_sent -= num_packets; 2658 } else { 2659 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2660 conn->num_packets_sent = 0; 2661 } 2662 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2663 2664 #ifdef ENABLE_CLASSIC 2665 // For SCO, we do the can_send_now_check here 2666 hci_notify_if_sco_can_send_now(); 2667 #endif 2668 } 2669 break; 2670 } 2671 2672 #ifdef ENABLE_CLASSIC 2673 case HCI_EVENT_INQUIRY_COMPLETE: 2674 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2675 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2676 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2677 hci_emit_event(event, sizeof(event), 1); 2678 } 2679 break; 2680 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2681 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2682 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2683 } 2684 break; 2685 case HCI_EVENT_CONNECTION_REQUEST: 2686 reverse_bd_addr(&packet[2], addr); 2687 link_type = (hci_link_type_t) packet[11]; 2688 2689 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2690 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2691 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2692 bd_addr_copy(hci_stack->decline_addr, addr); 2693 break; 2694 } 2695 2696 if (hci_stack->gap_classic_accept_callback != NULL){ 2697 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2698 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2699 bd_addr_copy(hci_stack->decline_addr, addr); 2700 break; 2701 } 2702 } 2703 2704 // TODO: eval COD 8-10 2705 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2706 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2707 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2708 if (!conn) { 2709 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2710 } 2711 if (!conn) { 2712 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2713 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2714 bd_addr_copy(hci_stack->decline_addr, addr); 2715 break; 2716 } 2717 conn->role = HCI_ROLE_SLAVE; 2718 conn->state = RECEIVED_CONNECTION_REQUEST; 2719 // store info about eSCO 2720 if (link_type == HCI_LINK_TYPE_ESCO){ 2721 conn->remote_supported_features[0] |= 1; 2722 } 2723 hci_run(); 2724 break; 2725 2726 case HCI_EVENT_CONNECTION_COMPLETE: 2727 // Connection management 2728 reverse_bd_addr(&packet[5], addr); 2729 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2730 addr_type = BD_ADDR_TYPE_ACL; 2731 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2732 if (conn) { 2733 if (!packet[2]){ 2734 conn->state = OPEN; 2735 conn->con_handle = little_endian_read_16(packet, 3); 2736 2737 // queue set supervision timeout if we're master 2738 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2739 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2740 } 2741 2742 // restart timer 2743 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2744 btstack_run_loop_add_timer(&conn->timeout); 2745 2746 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2747 2748 hci_emit_nr_connections_changed(); 2749 } else { 2750 // connection failed 2751 hci_handle_connection_failed(conn, packet[2]); 2752 } 2753 } 2754 break; 2755 2756 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2757 reverse_bd_addr(&packet[5], addr); 2758 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2759 if (packet[2]){ 2760 // connection failed 2761 break; 2762 } 2763 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2764 if (!conn) { 2765 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2766 } 2767 if (!conn) { 2768 break; 2769 } 2770 conn->state = OPEN; 2771 conn->con_handle = little_endian_read_16(packet, 3); 2772 2773 #ifdef ENABLE_SCO_OVER_HCI 2774 // update SCO 2775 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2776 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2777 } 2778 // trigger can send now 2779 if (hci_have_usb_transport()){ 2780 hci_stack->sco_can_send_now = true; 2781 } 2782 #endif 2783 #ifdef HAVE_SCO_TRANSPORT 2784 // configure sco transport 2785 if (hci_stack->sco_transport != NULL){ 2786 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2787 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2788 } 2789 #endif 2790 break; 2791 2792 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2793 handle = little_endian_read_16(packet, 3); 2794 conn = hci_connection_for_handle(handle); 2795 if (!conn) break; 2796 if (!packet[2]){ 2797 const uint8_t * features = &packet[5]; 2798 hci_handle_remote_features_page_0(conn, features); 2799 2800 // read extended features if possible 2801 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2802 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2803 break; 2804 } 2805 } 2806 hci_handle_remote_features_received(conn); 2807 break; 2808 2809 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2810 handle = little_endian_read_16(packet, 3); 2811 conn = hci_connection_for_handle(handle); 2812 if (!conn) break; 2813 // status = ok, page = 1 2814 if (!packet[2]) { 2815 uint8_t page_number = packet[5]; 2816 uint8_t maximum_page_number = packet[6]; 2817 const uint8_t * features = &packet[7]; 2818 bool done = false; 2819 switch (page_number){ 2820 case 1: 2821 hci_handle_remote_features_page_1(conn, features); 2822 if (maximum_page_number >= 2){ 2823 // get Secure Connections (Controller) from Page 2 if available 2824 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2825 } else { 2826 // otherwise, assume SC (Controller) == SC (Host) 2827 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2828 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2829 } 2830 done = true; 2831 } 2832 break; 2833 case 2: 2834 hci_handle_remote_features_page_2(conn, features); 2835 done = true; 2836 break; 2837 default: 2838 break; 2839 } 2840 if (!done) break; 2841 } 2842 hci_handle_remote_features_received(conn); 2843 break; 2844 2845 case HCI_EVENT_LINK_KEY_REQUEST: 2846 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2847 hci_event_link_key_request_get_bd_addr(packet, addr); 2848 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2849 if (!conn) break; 2850 2851 // lookup link key in db if not cached 2852 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2853 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2854 } 2855 2856 // response sent by hci_run() 2857 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2858 #endif 2859 break; 2860 2861 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2862 hci_event_link_key_request_get_bd_addr(packet, addr); 2863 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2864 if (!conn) break; 2865 2866 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2867 2868 // CVE-2020-26555: ignore NULL link key 2869 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2870 if (btstack_is_null(&packet[8], 16)) break; 2871 2872 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2873 // Change Connection Encryption keeps link key type 2874 if (link_key_type != CHANGED_COMBINATION_KEY){ 2875 conn->link_key_type = link_key_type; 2876 } 2877 2878 // cache link key. link keys stored in little-endian format for legacy reasons 2879 memcpy(&conn->link_key, &packet[8], 16); 2880 2881 // only store link key: 2882 // - if bondable enabled 2883 if (hci_stack->bondable == false) break; 2884 // - if security level sufficient 2885 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2886 // - for SSP, also check if remote side requested bonding as well 2887 if (conn->link_key_type != COMBINATION_KEY){ 2888 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2889 if (!remote_bonding){ 2890 break; 2891 } 2892 } 2893 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2894 break; 2895 } 2896 2897 case HCI_EVENT_PIN_CODE_REQUEST: 2898 hci_event_pin_code_request_get_bd_addr(packet, addr); 2899 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2900 if (!conn) break; 2901 2902 hci_pairing_started(conn, false); 2903 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2904 if (!hci_stack->bondable ){ 2905 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2906 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2907 hci_run(); 2908 return; 2909 } 2910 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2911 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2912 log_info("Level 4 required, but SC not supported -> abort"); 2913 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2914 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2915 hci_run(); 2916 return; 2917 } 2918 break; 2919 2920 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2921 hci_event_io_capability_response_get_bd_addr(packet, addr); 2922 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2923 if (!conn) break; 2924 2925 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2926 hci_pairing_started(conn, true); 2927 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2928 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2929 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2930 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2931 #endif 2932 break; 2933 2934 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2935 hci_event_io_capability_response_get_bd_addr(packet, addr); 2936 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2937 if (!conn) break; 2938 2939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2940 hci_connection_timestamp(conn); 2941 hci_pairing_started(conn, true); 2942 break; 2943 2944 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2945 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2946 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2947 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2948 if (!conn) break; 2949 2950 hci_connection_timestamp(conn); 2951 2952 hci_pairing_started(conn, true); 2953 2954 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2955 break; 2956 #endif 2957 2958 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2959 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2961 if (!conn) break; 2962 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2963 if (hci_stack->ssp_auto_accept){ 2964 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2965 }; 2966 } else { 2967 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2968 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2969 // don't forward event to app 2970 hci_run(); 2971 return; 2972 } 2973 break; 2974 2975 case HCI_EVENT_USER_PASSKEY_REQUEST: 2976 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2977 if (hci_stack->ssp_auto_accept){ 2978 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2979 }; 2980 break; 2981 2982 case HCI_EVENT_MODE_CHANGE: 2983 handle = hci_event_mode_change_get_handle(packet); 2984 conn = hci_connection_for_handle(handle); 2985 if (!conn) break; 2986 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2987 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2988 break; 2989 #endif 2990 2991 case HCI_EVENT_ENCRYPTION_CHANGE: 2992 handle = hci_event_encryption_change_get_connection_handle(packet); 2993 conn = hci_connection_for_handle(handle); 2994 if (!conn) break; 2995 if (hci_event_encryption_change_get_status(packet) == 0u) { 2996 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2997 if (encryption_enabled){ 2998 if (hci_is_le_connection(conn)){ 2999 // For LE, we accept connection as encrypted 3000 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3001 } 3002 #ifdef ENABLE_CLASSIC 3003 else { 3004 3005 // dedicated bonding: send result and disconnect 3006 if (conn->bonding_flags & BONDING_DEDICATED){ 3007 conn->bonding_flags &= ~BONDING_DEDICATED; 3008 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3009 conn->bonding_status = packet[2]; 3010 break; 3011 } 3012 3013 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3014 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3015 bool connected_uses_aes_ccm = encryption_enabled == 2; 3016 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3017 log_info("SC during pairing, but only E0 now -> abort"); 3018 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3019 break; 3020 } 3021 3022 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3023 if (connected_uses_aes_ccm){ 3024 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3025 } 3026 3027 #ifdef ENABLE_TESTING_SUPPORT 3028 // work around for issue with PTS dongle 3029 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3030 #endif 3031 3032 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3033 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3034 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3035 } else { 3036 // if not, pretend everything is perfect 3037 hci_handle_read_encryption_key_size_complete(conn, 16); 3038 } 3039 } 3040 #endif 3041 } else { 3042 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3043 } 3044 } 3045 3046 break; 3047 3048 #ifdef ENABLE_CLASSIC 3049 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3050 handle = hci_event_authentication_complete_get_connection_handle(packet); 3051 conn = hci_connection_for_handle(handle); 3052 if (!conn) break; 3053 3054 // clear authentication active flag 3055 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3056 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3057 3058 // authenticated only if auth status == 0 3059 if (hci_event_authentication_complete_get_status(packet) == 0){ 3060 // authenticated 3061 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3062 3063 // If not already encrypted, start encryption 3064 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3065 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3066 break; 3067 } 3068 } 3069 3070 // emit updated security level 3071 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3072 break; 3073 3074 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3075 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3076 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3077 if (!conn) break; 3078 3079 // treat successfully paired connection as authenticated 3080 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3081 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3082 } 3083 3084 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3085 break; 3086 #endif 3087 3088 // HCI_EVENT_DISCONNECTION_COMPLETE 3089 // has been split, to first notify stack before shutting connection down 3090 // see end of function, too. 3091 case HCI_EVENT_DISCONNECTION_COMPLETE: 3092 if (packet[2]) break; // status != 0 3093 handle = little_endian_read_16(packet, 3); 3094 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3095 if (hci_stack->acl_fragmentation_total_size > 0u) { 3096 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3097 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3098 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3099 hci_stack->acl_fragmentation_total_size = 0; 3100 hci_stack->acl_fragmentation_pos = 0; 3101 if (release_buffer){ 3102 hci_release_packet_buffer(); 3103 } 3104 } 3105 } 3106 3107 conn = hci_connection_for_handle(handle); 3108 if (!conn) break; 3109 #ifdef ENABLE_CLASSIC 3110 // pairing failed if it was ongoing 3111 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3112 #endif 3113 3114 // emit dedicatd bonding event 3115 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3116 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3117 } 3118 3119 // mark connection for shutdown, stop timers, reset state 3120 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3121 hci_connection_stop_timer(conn); 3122 hci_connection_init(conn); 3123 3124 #ifdef ENABLE_BLE 3125 #ifdef ENABLE_LE_PERIPHERAL 3126 // re-enable advertisements for le connections if active 3127 if (hci_is_le_connection(conn)){ 3128 hci_update_advertisements_enabled_for_current_roles(); 3129 } 3130 #endif 3131 #endif 3132 break; 3133 3134 case HCI_EVENT_HARDWARE_ERROR: 3135 log_error("Hardware Error: 0x%02x", packet[2]); 3136 if (hci_stack->hardware_error_callback){ 3137 (*hci_stack->hardware_error_callback)(packet[2]); 3138 } else { 3139 // if no special requests, just reboot stack 3140 hci_power_control_off(); 3141 hci_power_control_on(); 3142 } 3143 break; 3144 3145 #ifdef ENABLE_CLASSIC 3146 case HCI_EVENT_ROLE_CHANGE: 3147 if (packet[2]) break; // status != 0 3148 reverse_bd_addr(&packet[3], addr); 3149 addr_type = BD_ADDR_TYPE_ACL; 3150 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3151 if (!conn) break; 3152 conn->role = packet[9]; 3153 break; 3154 #endif 3155 3156 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3157 // release packet buffer only for asynchronous transport and if there are not further fragements 3158 if (hci_transport_synchronous()) { 3159 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3160 return; // instead of break: to avoid re-entering hci_run() 3161 } 3162 hci_stack->acl_fragmentation_tx_active = 0; 3163 if (hci_stack->acl_fragmentation_total_size) break; 3164 hci_release_packet_buffer(); 3165 3166 // L2CAP receives this event via the hci_emit_event below 3167 3168 #ifdef ENABLE_CLASSIC 3169 // For SCO, we do the can_send_now_check here 3170 hci_notify_if_sco_can_send_now(); 3171 #endif 3172 break; 3173 3174 #ifdef ENABLE_CLASSIC 3175 case HCI_EVENT_SCO_CAN_SEND_NOW: 3176 // For SCO, we do the can_send_now_check here 3177 hci_stack->sco_can_send_now = true; 3178 hci_notify_if_sco_can_send_now(); 3179 return; 3180 3181 // explode inquriy results for easier consumption 3182 case HCI_EVENT_INQUIRY_RESULT: 3183 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3184 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3185 gap_inquiry_explode(packet, size); 3186 break; 3187 #endif 3188 3189 #ifdef ENABLE_BLE 3190 case HCI_EVENT_LE_META: 3191 switch (packet[2]){ 3192 #ifdef ENABLE_LE_CENTRAL 3193 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3194 // log_info("advertising report received"); 3195 if (!hci_stack->le_scanning_enabled) break; 3196 le_handle_advertisement_report(packet, size); 3197 break; 3198 #endif 3199 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3200 event_handle_le_connection_complete(packet); 3201 break; 3202 3203 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3204 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3205 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3206 conn = hci_connection_for_handle(handle); 3207 if (!conn) break; 3208 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3209 break; 3210 3211 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3212 // connection 3213 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3214 conn = hci_connection_for_handle(handle); 3215 if (conn) { 3216 // read arguments 3217 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3218 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3219 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3220 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3221 3222 // validate against current connection parameter range 3223 le_connection_parameter_range_t existing_range; 3224 gap_get_connection_parameter_range(&existing_range); 3225 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3226 if (update_parameter){ 3227 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3228 conn->le_conn_interval_min = le_conn_interval_min; 3229 conn->le_conn_interval_max = le_conn_interval_max; 3230 conn->le_conn_latency = le_conn_latency; 3231 conn->le_supervision_timeout = le_supervision_timeout; 3232 } else { 3233 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3234 } 3235 } 3236 break; 3237 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3238 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3239 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3240 conn = hci_connection_for_handle(handle); 3241 if (conn) { 3242 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3243 } 3244 break; 3245 #endif 3246 default: 3247 break; 3248 } 3249 break; 3250 #endif 3251 case HCI_EVENT_VENDOR_SPECIFIC: 3252 // Vendor specific commands often create vendor specific event instead of num completed packets 3253 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3254 switch (hci_stack->manufacturer){ 3255 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3256 hci_stack->num_cmd_packets = 1; 3257 break; 3258 default: 3259 break; 3260 } 3261 break; 3262 default: 3263 break; 3264 } 3265 3266 handle_event_for_current_stack_state(packet, size); 3267 3268 // notify upper stack 3269 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3270 3271 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3272 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3273 handle = little_endian_read_16(packet, 3); 3274 hci_connection_t * aConn = hci_connection_for_handle(handle); 3275 // discard connection if app did not trigger a reconnect in the event handler 3276 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3277 hci_shutdown_connection(aConn); 3278 } 3279 } 3280 3281 // execute main loop 3282 hci_run(); 3283 } 3284 3285 #ifdef ENABLE_CLASSIC 3286 3287 #ifdef ENABLE_SCO_OVER_HCI 3288 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3289 static void sco_schedule_tx(hci_connection_t * conn); 3290 3291 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3292 log_debug("SCO TX Timeout"); 3293 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3294 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3295 if (!conn) return; 3296 3297 // trigger send 3298 conn->sco_tx_ready = 1; 3299 // extra packet if CVSD but SCO buffer is too short 3300 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3301 conn->sco_tx_ready++; 3302 } 3303 hci_notify_if_sco_can_send_now(); 3304 } 3305 3306 3307 #define SCO_TX_AFTER_RX_MS (6) 3308 3309 static void sco_schedule_tx(hci_connection_t * conn){ 3310 3311 uint32_t now = btstack_run_loop_get_time_ms(); 3312 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3313 int time_delta_ms = sco_tx_ms - now; 3314 3315 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3316 3317 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3318 btstack_run_loop_remove_timer(timer); 3319 btstack_run_loop_set_timer(timer, time_delta_ms); 3320 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3321 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3322 btstack_run_loop_add_timer(timer); 3323 } 3324 #endif 3325 3326 static void sco_handler(uint8_t * packet, uint16_t size){ 3327 // lookup connection struct 3328 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3329 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3330 if (!conn) return; 3331 3332 #ifdef ENABLE_SCO_OVER_HCI 3333 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3334 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3335 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3336 packet[2] = 0x3c; 3337 memmove(&packet[3], &packet[23], 63); 3338 size = 63; 3339 } 3340 } 3341 3342 if (hci_have_usb_transport()){ 3343 // Nothing to do 3344 } else { 3345 // 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); 3346 if (hci_stack->synchronous_flow_control_enabled == 0){ 3347 uint32_t now = btstack_run_loop_get_time_ms(); 3348 3349 if (!conn->sco_rx_valid){ 3350 // ignore first 10 packets 3351 conn->sco_rx_count++; 3352 // log_debug("sco rx count %u", conn->sco_rx_count); 3353 if (conn->sco_rx_count == 10) { 3354 // use first timestamp as is and pretent it just started 3355 conn->sco_rx_ms = now; 3356 conn->sco_rx_valid = 1; 3357 conn->sco_rx_count = 0; 3358 sco_schedule_tx(conn); 3359 } 3360 } else { 3361 // track expected arrival timme 3362 conn->sco_rx_count++; 3363 conn->sco_rx_ms += 7; 3364 int delta = (int32_t) (now - conn->sco_rx_ms); 3365 if (delta > 0){ 3366 conn->sco_rx_ms++; 3367 } 3368 // log_debug("sco rx %u", conn->sco_rx_ms); 3369 sco_schedule_tx(conn); 3370 } 3371 } 3372 } 3373 #endif 3374 3375 // deliver to app 3376 if (hci_stack->sco_packet_handler) { 3377 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3378 } 3379 3380 #ifdef HAVE_SCO_TRANSPORT 3381 // We can send one packet for each received packet 3382 conn->sco_tx_ready++; 3383 hci_notify_if_sco_can_send_now(); 3384 #endif 3385 3386 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3387 conn->num_packets_completed++; 3388 hci_stack->host_completed_packets = 1; 3389 hci_run(); 3390 #endif 3391 } 3392 #endif 3393 3394 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3395 hci_dump_packet(packet_type, 1, packet, size); 3396 switch (packet_type) { 3397 case HCI_EVENT_PACKET: 3398 event_handler(packet, size); 3399 break; 3400 case HCI_ACL_DATA_PACKET: 3401 acl_handler(packet, size); 3402 break; 3403 #ifdef ENABLE_CLASSIC 3404 case HCI_SCO_DATA_PACKET: 3405 sco_handler(packet, size); 3406 break; 3407 #endif 3408 default: 3409 break; 3410 } 3411 } 3412 3413 /** 3414 * @brief Add event packet handler. 3415 */ 3416 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3417 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3418 } 3419 3420 /** 3421 * @brief Remove event packet handler. 3422 */ 3423 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3424 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3425 } 3426 3427 /** Register HCI packet handlers */ 3428 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3429 hci_stack->acl_packet_handler = handler; 3430 } 3431 3432 #ifdef ENABLE_CLASSIC 3433 /** 3434 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3435 */ 3436 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3437 hci_stack->sco_packet_handler = handler; 3438 } 3439 #endif 3440 3441 static void hci_state_reset(void){ 3442 // no connections yet 3443 hci_stack->connections = NULL; 3444 3445 // keep discoverable/connectable as this has been requested by the client(s) 3446 // hci_stack->discoverable = 0; 3447 // hci_stack->connectable = 0; 3448 // hci_stack->bondable = 1; 3449 // hci_stack->own_addr_type = 0; 3450 3451 // buffer is free 3452 hci_stack->hci_packet_buffer_reserved = false; 3453 3454 // no pending cmds 3455 hci_stack->decline_reason = 0; 3456 3457 hci_stack->secure_connections_active = false; 3458 3459 #ifdef ENABLE_CLASSIC 3460 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3461 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3462 3463 hci_stack->gap_tasks = 3464 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3465 GAP_TASK_SET_CLASS_OF_DEVICE | 3466 GAP_TASK_SET_LOCAL_NAME | 3467 GAP_TASK_SET_EIR_DATA | 3468 GAP_TASK_WRITE_SCAN_ENABLE | 3469 GAP_TASK_WRITE_PAGE_TIMEOUT; 3470 #endif 3471 3472 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3473 hci_stack->classic_read_local_oob_data = false; 3474 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3475 #endif 3476 3477 // LE 3478 #ifdef ENABLE_BLE 3479 memset(hci_stack->le_random_address, 0, 6); 3480 hci_stack->le_random_address_set = 0; 3481 #endif 3482 #ifdef ENABLE_LE_CENTRAL 3483 hci_stack->le_scanning_active = false; 3484 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3485 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3486 hci_stack->le_whitelist_capacity = 0; 3487 #endif 3488 #ifdef ENABLE_LE_PERIPHERAL 3489 hci_stack->le_advertisements_active = false; 3490 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3491 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3492 } 3493 if (hci_stack->le_advertisements_data != NULL){ 3494 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3495 } 3496 #endif 3497 } 3498 3499 #ifdef ENABLE_CLASSIC 3500 /** 3501 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3502 */ 3503 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3504 // store and open remote device db 3505 hci_stack->link_key_db = link_key_db; 3506 if (hci_stack->link_key_db) { 3507 hci_stack->link_key_db->open(); 3508 } 3509 } 3510 #endif 3511 3512 void hci_init(const hci_transport_t *transport, const void *config){ 3513 3514 #ifdef HAVE_MALLOC 3515 if (!hci_stack) { 3516 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3517 } 3518 #else 3519 hci_stack = &hci_stack_static; 3520 #endif 3521 memset(hci_stack, 0, sizeof(hci_stack_t)); 3522 3523 // reference to use transport layer implementation 3524 hci_stack->hci_transport = transport; 3525 3526 // reference to used config 3527 hci_stack->config = config; 3528 3529 // setup pointer for outgoing packet buffer 3530 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3531 3532 // max acl payload size defined in config.h 3533 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3534 3535 // register packet handlers with transport 3536 transport->register_packet_handler(&packet_handler); 3537 3538 hci_stack->state = HCI_STATE_OFF; 3539 3540 // class of device 3541 hci_stack->class_of_device = 0x007a020c; // Smartphone 3542 3543 // bondable by default 3544 hci_stack->bondable = 1; 3545 3546 #ifdef ENABLE_CLASSIC 3547 // classic name 3548 hci_stack->local_name = default_classic_name; 3549 3550 // Master slave policy 3551 hci_stack->master_slave_policy = 1; 3552 3553 // Allow Role Switch 3554 hci_stack->allow_role_switch = 1; 3555 3556 // Default / minimum security level = 2 3557 hci_stack->gap_security_level = LEVEL_2; 3558 3559 // Default Security Mode 4 3560 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3561 3562 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3563 hci_stack->gap_required_encyrption_key_size = 7; 3564 3565 // Link Supervision Timeout 3566 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3567 3568 #endif 3569 3570 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3571 hci_stack->ssp_enable = 1; 3572 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3573 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3574 hci_stack->ssp_auto_accept = 1; 3575 3576 // Secure Connections: enable (requires support from Controller) 3577 hci_stack->secure_connections_enable = true; 3578 3579 // voice setting - signed 16 bit pcm data with CVSD over the air 3580 hci_stack->sco_voice_setting = 0x60; 3581 3582 #ifdef ENABLE_LE_CENTRAL 3583 // connection parameter to use for outgoing connections 3584 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3585 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3586 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3587 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3588 hci_stack->le_connection_latency = 4; // 4 3589 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3590 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3591 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3592 3593 // default LE Scanning 3594 hci_stack->le_scan_type = 0x1; // active 3595 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3596 hci_stack->le_scan_window = 0x30; // 30 ms 3597 #endif 3598 3599 #ifdef ENABLE_LE_PERIPHERAL 3600 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3601 #endif 3602 3603 // connection parameter range used to answer connection parameter update requests in l2cap 3604 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3605 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3606 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3607 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3608 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3609 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3610 3611 hci_state_reset(); 3612 } 3613 3614 void hci_deinit(void){ 3615 #ifdef HAVE_MALLOC 3616 if (hci_stack) { 3617 free(hci_stack); 3618 } 3619 #endif 3620 hci_stack = NULL; 3621 3622 #ifdef ENABLE_CLASSIC 3623 disable_l2cap_timeouts = 0; 3624 #endif 3625 } 3626 3627 /** 3628 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3629 */ 3630 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3631 hci_stack->chipset = chipset_driver; 3632 3633 // reset chipset driver - init is also called on power_up 3634 if (hci_stack->chipset && hci_stack->chipset->init){ 3635 hci_stack->chipset->init(hci_stack->config); 3636 } 3637 } 3638 3639 /** 3640 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3641 */ 3642 void hci_set_control(const btstack_control_t *hardware_control){ 3643 // references to used control implementation 3644 hci_stack->control = hardware_control; 3645 // init with transport config 3646 hardware_control->init(hci_stack->config); 3647 } 3648 3649 static void hci_discard_connections(void){ 3650 btstack_linked_list_iterator_t lit; 3651 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3652 while (btstack_linked_list_iterator_has_next(&lit)){ 3653 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3654 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3655 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3656 hci_shutdown_connection(connection); 3657 } 3658 } 3659 3660 void hci_close(void){ 3661 3662 #ifdef ENABLE_CLASSIC 3663 // close remote device db 3664 if (hci_stack->link_key_db) { 3665 hci_stack->link_key_db->close(); 3666 } 3667 #endif 3668 3669 hci_discard_connections(); 3670 3671 hci_power_control(HCI_POWER_OFF); 3672 3673 #ifdef HAVE_MALLOC 3674 free(hci_stack); 3675 #endif 3676 hci_stack = NULL; 3677 } 3678 3679 #ifdef HAVE_SCO_TRANSPORT 3680 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3681 hci_stack->sco_transport = sco_transport; 3682 sco_transport->register_packet_handler(&packet_handler); 3683 } 3684 #endif 3685 3686 #ifdef ENABLE_CLASSIC 3687 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3688 // validate ranage and set 3689 if (encryption_key_size < 7) return; 3690 if (encryption_key_size > 16) return; 3691 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3692 } 3693 3694 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3695 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3696 hci_stack->gap_security_mode = security_mode; 3697 return ERROR_CODE_SUCCESS; 3698 } else { 3699 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3700 } 3701 } 3702 3703 gap_security_mode_t gap_get_security_mode(void){ 3704 return hci_stack->gap_security_mode; 3705 } 3706 3707 void gap_set_security_level(gap_security_level_t security_level){ 3708 hci_stack->gap_security_level = security_level; 3709 } 3710 3711 gap_security_level_t gap_get_security_level(void){ 3712 if (hci_stack->gap_secure_connections_only_mode){ 3713 return LEVEL_4; 3714 } 3715 return hci_stack->gap_security_level; 3716 } 3717 3718 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3719 hci_stack->gap_minimal_service_security_level = security_level; 3720 } 3721 3722 void gap_set_secure_connections_only_mode(bool enable){ 3723 hci_stack->gap_secure_connections_only_mode = enable; 3724 } 3725 3726 bool gap_get_secure_connections_only_mode(void){ 3727 return hci_stack->gap_secure_connections_only_mode; 3728 } 3729 #endif 3730 3731 #ifdef ENABLE_CLASSIC 3732 void gap_set_class_of_device(uint32_t class_of_device){ 3733 hci_stack->class_of_device = class_of_device; 3734 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3735 hci_run(); 3736 } 3737 3738 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3739 hci_stack->default_link_policy_settings = default_link_policy_settings; 3740 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3741 hci_run(); 3742 } 3743 3744 void gap_set_allow_role_switch(bool allow_role_switch){ 3745 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3746 } 3747 3748 uint8_t hci_get_allow_role_switch(void){ 3749 return hci_stack->allow_role_switch; 3750 } 3751 3752 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3753 hci_stack->link_supervision_timeout = link_supervision_timeout; 3754 } 3755 3756 void hci_disable_l2cap_timeout_check(void){ 3757 disable_l2cap_timeouts = 1; 3758 } 3759 #endif 3760 3761 #ifndef HAVE_HOST_CONTROLLER_API 3762 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3763 void hci_set_bd_addr(bd_addr_t addr){ 3764 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3765 hci_stack->custom_bd_addr_set = 1; 3766 } 3767 #endif 3768 3769 // State-Module-Driver overview 3770 // state module low-level 3771 // HCI_STATE_OFF off close 3772 // HCI_STATE_INITIALIZING, on open 3773 // HCI_STATE_WORKING, on open 3774 // HCI_STATE_HALTING, on open 3775 // HCI_STATE_SLEEPING, off/sleep close 3776 // HCI_STATE_FALLING_ASLEEP on open 3777 3778 static int hci_power_control_on(void){ 3779 3780 // power on 3781 int err = 0; 3782 if (hci_stack->control && hci_stack->control->on){ 3783 err = (*hci_stack->control->on)(); 3784 } 3785 if (err){ 3786 log_error( "POWER_ON failed"); 3787 hci_emit_hci_open_failed(); 3788 return err; 3789 } 3790 3791 // int chipset driver 3792 if (hci_stack->chipset && hci_stack->chipset->init){ 3793 hci_stack->chipset->init(hci_stack->config); 3794 } 3795 3796 // init transport 3797 if (hci_stack->hci_transport->init){ 3798 hci_stack->hci_transport->init(hci_stack->config); 3799 } 3800 3801 // open transport 3802 err = hci_stack->hci_transport->open(); 3803 if (err){ 3804 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3805 if (hci_stack->control && hci_stack->control->off){ 3806 (*hci_stack->control->off)(); 3807 } 3808 hci_emit_hci_open_failed(); 3809 return err; 3810 } 3811 return 0; 3812 } 3813 3814 static void hci_power_control_off(void){ 3815 3816 log_info("hci_power_control_off"); 3817 3818 // close low-level device 3819 hci_stack->hci_transport->close(); 3820 3821 log_info("hci_power_control_off - hci_transport closed"); 3822 3823 // power off 3824 if (hci_stack->control && hci_stack->control->off){ 3825 (*hci_stack->control->off)(); 3826 } 3827 3828 log_info("hci_power_control_off - control closed"); 3829 3830 hci_stack->state = HCI_STATE_OFF; 3831 } 3832 3833 static void hci_power_control_sleep(void){ 3834 3835 log_info("hci_power_control_sleep"); 3836 3837 #if 0 3838 // don't close serial port during sleep 3839 3840 // close low-level device 3841 hci_stack->hci_transport->close(hci_stack->config); 3842 #endif 3843 3844 // sleep mode 3845 if (hci_stack->control && hci_stack->control->sleep){ 3846 (*hci_stack->control->sleep)(); 3847 } 3848 3849 hci_stack->state = HCI_STATE_SLEEPING; 3850 } 3851 3852 static int hci_power_control_wake(void){ 3853 3854 log_info("hci_power_control_wake"); 3855 3856 // wake on 3857 if (hci_stack->control && hci_stack->control->wake){ 3858 (*hci_stack->control->wake)(); 3859 } 3860 3861 #if 0 3862 // open low-level device 3863 int err = hci_stack->hci_transport->open(hci_stack->config); 3864 if (err){ 3865 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3866 if (hci_stack->control && hci_stack->control->off){ 3867 (*hci_stack->control->off)(); 3868 } 3869 hci_emit_hci_open_failed(); 3870 return err; 3871 } 3872 #endif 3873 3874 return 0; 3875 } 3876 3877 static void hci_power_transition_to_initializing(void){ 3878 // set up state machine 3879 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3880 hci_stack->hci_packet_buffer_reserved = false; 3881 hci_stack->state = HCI_STATE_INITIALIZING; 3882 hci_stack->substate = HCI_INIT_SEND_RESET; 3883 } 3884 3885 // returns error 3886 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3887 int err; 3888 switch (power_mode){ 3889 case HCI_POWER_ON: 3890 err = hci_power_control_on(); 3891 if (err != 0) { 3892 log_error("hci_power_control_on() error %d", err); 3893 return err; 3894 } 3895 hci_power_transition_to_initializing(); 3896 break; 3897 case HCI_POWER_OFF: 3898 // do nothing 3899 break; 3900 case HCI_POWER_SLEEP: 3901 // do nothing (with SLEEP == OFF) 3902 break; 3903 default: 3904 btstack_assert(false); 3905 break; 3906 } 3907 return ERROR_CODE_SUCCESS; 3908 } 3909 3910 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3911 switch (power_mode){ 3912 case HCI_POWER_ON: 3913 // do nothing 3914 break; 3915 case HCI_POWER_OFF: 3916 // no connections yet, just turn it off 3917 hci_power_control_off(); 3918 break; 3919 case HCI_POWER_SLEEP: 3920 // no connections yet, just turn it off 3921 hci_power_control_sleep(); 3922 break; 3923 default: 3924 btstack_assert(false); 3925 break; 3926 } 3927 return ERROR_CODE_SUCCESS; 3928 } 3929 3930 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3931 switch (power_mode){ 3932 case HCI_POWER_ON: 3933 // do nothing 3934 break; 3935 case HCI_POWER_OFF: 3936 // see hci_run 3937 hci_stack->state = HCI_STATE_HALTING; 3938 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3939 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3940 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3941 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3942 btstack_run_loop_add_timer(&hci_stack->timeout); 3943 break; 3944 case HCI_POWER_SLEEP: 3945 // see hci_run 3946 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3947 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3948 break; 3949 default: 3950 btstack_assert(false); 3951 break; 3952 } 3953 return ERROR_CODE_SUCCESS; 3954 } 3955 3956 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3957 switch (power_mode){ 3958 case HCI_POWER_ON: 3959 hci_power_transition_to_initializing(); 3960 break; 3961 case HCI_POWER_OFF: 3962 // do nothing 3963 break; 3964 case HCI_POWER_SLEEP: 3965 // see hci_run 3966 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3967 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3968 break; 3969 default: 3970 btstack_assert(false); 3971 break; 3972 } 3973 return ERROR_CODE_SUCCESS; 3974 } 3975 3976 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3977 switch (power_mode){ 3978 case HCI_POWER_ON: 3979 hci_power_transition_to_initializing(); 3980 break; 3981 case HCI_POWER_OFF: 3982 // see hci_run 3983 hci_stack->state = HCI_STATE_HALTING; 3984 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3985 break; 3986 case HCI_POWER_SLEEP: 3987 // do nothing 3988 break; 3989 default: 3990 btstack_assert(false); 3991 break; 3992 } 3993 return ERROR_CODE_SUCCESS; 3994 } 3995 3996 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3997 int err; 3998 switch (power_mode){ 3999 case HCI_POWER_ON: 4000 err = hci_power_control_wake(); 4001 if (err) return err; 4002 hci_power_transition_to_initializing(); 4003 break; 4004 case HCI_POWER_OFF: 4005 hci_stack->state = HCI_STATE_HALTING; 4006 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4007 break; 4008 case HCI_POWER_SLEEP: 4009 // do nothing 4010 break; 4011 default: 4012 btstack_assert(false); 4013 break; 4014 } 4015 return ERROR_CODE_SUCCESS; 4016 } 4017 4018 int hci_power_control(HCI_POWER_MODE power_mode){ 4019 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4020 int err = 0; 4021 switch (hci_stack->state){ 4022 case HCI_STATE_OFF: 4023 err = hci_power_control_state_off(power_mode); 4024 break; 4025 case HCI_STATE_INITIALIZING: 4026 err = hci_power_control_state_initializing(power_mode); 4027 break; 4028 case HCI_STATE_WORKING: 4029 err = hci_power_control_state_working(power_mode); 4030 break; 4031 case HCI_STATE_HALTING: 4032 err = hci_power_control_state_halting(power_mode); 4033 break; 4034 case HCI_STATE_FALLING_ASLEEP: 4035 err = hci_power_control_state_falling_asleep(power_mode); 4036 break; 4037 case HCI_STATE_SLEEPING: 4038 err = hci_power_control_state_sleeping(power_mode); 4039 break; 4040 default: 4041 btstack_assert(false); 4042 break; 4043 } 4044 if (err != 0){ 4045 return err; 4046 } 4047 4048 // create internal event 4049 hci_emit_state(); 4050 4051 // trigger next/first action 4052 hci_run(); 4053 4054 return 0; 4055 } 4056 4057 4058 static void hci_halting_run(void){ 4059 4060 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4061 4062 hci_connection_t * connection; 4063 4064 switch (hci_stack->substate) { 4065 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4066 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4067 4068 #ifdef ENABLE_BLE 4069 #ifdef ENABLE_LE_CENTRAL 4070 hci_whitelist_free(); 4071 #endif 4072 #endif 4073 // close all open connections 4074 connection = (hci_connection_t *) hci_stack->connections; 4075 if (connection) { 4076 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4077 if (!hci_can_send_command_packet_now()) return; 4078 4079 // check state 4080 if (connection->state == SENT_DISCONNECT) return; 4081 connection->state = SENT_DISCONNECT; 4082 4083 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4084 4085 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4086 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4087 4088 // ... which would be ignored anyway as we shutdown (free) the connection now 4089 hci_shutdown_connection(connection); 4090 4091 // finally, send the disconnect command 4092 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4093 return; 4094 } 4095 4096 btstack_run_loop_remove_timer(&hci_stack->timeout); 4097 4098 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4099 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4100 log_info("HCI_STATE_HALTING: wait 50 ms"); 4101 hci_stack->substate = HCI_HALTING_W4_TIMER; 4102 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4103 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4104 btstack_run_loop_add_timer(&hci_stack->timeout); 4105 break; 4106 } 4107 4108 /* fall through */ 4109 4110 case HCI_HALTING_CLOSE: 4111 // close left over connections (that had not been properly closed before) 4112 hci_discard_connections(); 4113 4114 log_info("HCI_STATE_HALTING, calling off"); 4115 4116 // switch mode 4117 hci_power_control_off(); 4118 4119 log_info("HCI_STATE_HALTING, emitting state"); 4120 hci_emit_state(); 4121 log_info("HCI_STATE_HALTING, done"); 4122 break; 4123 4124 case HCI_HALTING_W4_TIMER: 4125 // keep waiting 4126 4127 break; 4128 default: 4129 break; 4130 } 4131 }; 4132 4133 static void hci_falling_asleep_run(void){ 4134 hci_connection_t * connection; 4135 switch(hci_stack->substate) { 4136 case HCI_FALLING_ASLEEP_DISCONNECT: 4137 log_info("HCI_STATE_FALLING_ASLEEP"); 4138 // close all open connections 4139 connection = (hci_connection_t *) hci_stack->connections; 4140 if (connection){ 4141 4142 // send disconnect 4143 if (!hci_can_send_command_packet_now()) return; 4144 4145 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4146 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4147 4148 // send disconnected event right away - causes higher layer connections to get closed, too. 4149 hci_shutdown_connection(connection); 4150 return; 4151 } 4152 4153 if (hci_classic_supported()){ 4154 // disable page and inquiry scan 4155 if (!hci_can_send_command_packet_now()) return; 4156 4157 log_info("HCI_STATE_HALTING, disabling inq scans"); 4158 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4159 4160 // continue in next sub state 4161 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4162 break; 4163 } 4164 4165 /* fall through */ 4166 4167 case HCI_FALLING_ASLEEP_COMPLETE: 4168 log_info("HCI_STATE_HALTING, calling sleep"); 4169 // switch mode 4170 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4171 hci_emit_state(); 4172 break; 4173 4174 default: 4175 break; 4176 } 4177 } 4178 4179 #ifdef ENABLE_CLASSIC 4180 4181 static void hci_update_scan_enable(void){ 4182 // 2 = page scan, 1 = inq scan 4183 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4184 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4185 hci_run(); 4186 } 4187 4188 void gap_discoverable_control(uint8_t enable){ 4189 if (enable) enable = 1; // normalize argument 4190 4191 if (hci_stack->discoverable == enable){ 4192 hci_emit_discoverable_enabled(hci_stack->discoverable); 4193 return; 4194 } 4195 4196 hci_stack->discoverable = enable; 4197 hci_update_scan_enable(); 4198 } 4199 4200 void gap_connectable_control(uint8_t enable){ 4201 if (enable) enable = 1; // normalize argument 4202 4203 // don't emit event 4204 if (hci_stack->connectable == enable) return; 4205 4206 hci_stack->connectable = enable; 4207 hci_update_scan_enable(); 4208 } 4209 #endif 4210 4211 void gap_local_bd_addr(bd_addr_t address_buffer){ 4212 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4213 } 4214 4215 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4216 static void hci_host_num_completed_packets(void){ 4217 4218 // create packet manually as arrays are not supported and num_commands should not get reduced 4219 hci_reserve_packet_buffer(); 4220 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4221 4222 uint16_t size = 0; 4223 uint16_t num_handles = 0; 4224 packet[size++] = 0x35; 4225 packet[size++] = 0x0c; 4226 size++; // skip param len 4227 size++; // skip num handles 4228 4229 // add { handle, packets } entries 4230 btstack_linked_item_t * it; 4231 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4232 hci_connection_t * connection = (hci_connection_t *) it; 4233 if (connection->num_packets_completed){ 4234 little_endian_store_16(packet, size, connection->con_handle); 4235 size += 2; 4236 little_endian_store_16(packet, size, connection->num_packets_completed); 4237 size += 2; 4238 // 4239 num_handles++; 4240 connection->num_packets_completed = 0; 4241 } 4242 } 4243 4244 packet[2] = size - 3; 4245 packet[3] = num_handles; 4246 4247 hci_stack->host_completed_packets = 0; 4248 4249 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4250 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4251 4252 // release packet buffer for synchronous transport implementations 4253 if (hci_transport_synchronous()){ 4254 hci_release_packet_buffer(); 4255 hci_emit_transport_packet_sent(); 4256 } 4257 } 4258 #endif 4259 4260 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4261 UNUSED(ds); 4262 hci_stack->substate = HCI_HALTING_CLOSE; 4263 // allow packet handlers to defer final shutdown 4264 hci_emit_state(); 4265 hci_run(); 4266 } 4267 4268 static bool hci_run_acl_fragments(void){ 4269 if (hci_stack->acl_fragmentation_total_size > 0u) { 4270 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4271 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4272 if (connection) { 4273 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4274 hci_send_acl_packet_fragments(connection); 4275 return true; 4276 } 4277 } else { 4278 // connection gone -> discard further fragments 4279 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4280 hci_stack->acl_fragmentation_total_size = 0; 4281 hci_stack->acl_fragmentation_pos = 0; 4282 } 4283 } 4284 return false; 4285 } 4286 4287 #ifdef ENABLE_CLASSIC 4288 static bool hci_run_general_gap_classic(void){ 4289 4290 // assert stack is working and classic is active 4291 if (hci_classic_supported() == false) return false; 4292 if (hci_stack->state != HCI_STATE_WORKING) return false; 4293 4294 // decline incoming connections 4295 if (hci_stack->decline_reason){ 4296 uint8_t reason = hci_stack->decline_reason; 4297 hci_stack->decline_reason = 0; 4298 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4299 return true; 4300 } 4301 4302 if (hci_stack->gap_tasks != 0){ 4303 hci_run_gap_tasks_classic(); 4304 return true; 4305 } 4306 4307 // start/stop inquiry 4308 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4309 uint8_t duration = hci_stack->inquiry_state; 4310 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4311 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4312 return true; 4313 } 4314 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4315 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4316 hci_send_cmd(&hci_inquiry_cancel); 4317 return true; 4318 } 4319 // remote name request 4320 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4321 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4322 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4323 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4324 return true; 4325 } 4326 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4327 // Local OOB data 4328 if (hci_stack->classic_read_local_oob_data){ 4329 hci_stack->classic_read_local_oob_data = false; 4330 if (hci_stack->local_supported_commands[1] & 0x10u){ 4331 hci_send_cmd(&hci_read_local_extended_oob_data); 4332 } else { 4333 hci_send_cmd(&hci_read_local_oob_data); 4334 } 4335 } 4336 #endif 4337 // pairing 4338 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4339 uint8_t state = hci_stack->gap_pairing_state; 4340 uint8_t pin_code[16]; 4341 switch (state){ 4342 case GAP_PAIRING_STATE_SEND_PIN: 4343 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4344 memset(pin_code, 0, 16); 4345 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4346 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4347 break; 4348 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4349 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4350 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4351 break; 4352 case GAP_PAIRING_STATE_SEND_PASSKEY: 4353 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4354 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4355 break; 4356 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4357 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4358 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4359 break; 4360 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4361 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4362 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4363 break; 4364 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4365 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4366 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4367 break; 4368 default: 4369 break; 4370 } 4371 return true; 4372 } 4373 return false; 4374 } 4375 #endif 4376 4377 #ifdef ENABLE_BLE 4378 static bool hci_run_general_gap_le(void){ 4379 4380 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4381 4382 if (hci_stack->state != HCI_STATE_WORKING) return false; 4383 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4384 4385 4386 // Phase 1: collect what to stop 4387 4388 bool scanning_stop = false; 4389 bool connecting_stop = false; 4390 bool advertising_stop = false; 4391 4392 #ifndef ENABLE_LE_CENTRAL 4393 UNUSED(scanning_stop); 4394 UNUSED(connecting_stop); 4395 #endif 4396 #ifndef ENABLE_LE_PERIPHERAL 4397 UNUSED(advertising_stop); 4398 #endif 4399 4400 // check if own address changes 4401 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4402 4403 // check if whitelist needs modification 4404 bool whitelist_modification_pending = false; 4405 btstack_linked_list_iterator_t lit; 4406 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4407 while (btstack_linked_list_iterator_has_next(&lit)){ 4408 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4409 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4410 whitelist_modification_pending = true; 4411 break; 4412 } 4413 } 4414 // check if resolving list needs modification 4415 bool resolving_list_modification_pending = false; 4416 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4417 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4418 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4419 resolving_list_modification_pending = true; 4420 } 4421 #endif 4422 4423 #ifdef ENABLE_LE_CENTRAL 4424 // scanning control 4425 if (hci_stack->le_scanning_active) { 4426 // stop if: 4427 // - parameter change required 4428 // - it's disabled 4429 // - whitelist change required but used for scanning 4430 // - resolving list modified 4431 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4432 if ((hci_stack->le_scanning_param_update) || 4433 !hci_stack->le_scanning_enabled || 4434 scanning_uses_whitelist || 4435 resolving_list_modification_pending){ 4436 4437 scanning_stop = true; 4438 } 4439 } 4440 #endif 4441 4442 #ifdef ENABLE_LE_CENTRAL 4443 // connecting control 4444 bool connecting_with_whitelist; 4445 switch (hci_stack->le_connecting_state){ 4446 case LE_CONNECTING_DIRECT: 4447 case LE_CONNECTING_WHITELIST: 4448 // stop connecting if: 4449 // - connecting uses white and whitelist modification pending 4450 // - if it got disabled 4451 // - resolving list modified 4452 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4453 if ((connecting_with_whitelist && whitelist_modification_pending) || 4454 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4455 resolving_list_modification_pending) { 4456 4457 connecting_stop = true; 4458 } 4459 break; 4460 default: 4461 break; 4462 } 4463 #endif 4464 4465 #ifdef ENABLE_LE_PERIPHERAL 4466 // le advertisement control 4467 if (hci_stack->le_advertisements_active){ 4468 // stop if: 4469 // - parameter change required 4470 // - random address used in advertising and changes 4471 // - it's disabled 4472 // - whitelist change required but used for advertisement filter policy 4473 // - resolving list modified 4474 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4475 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4476 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4477 if (advertising_change || 4478 (advertising_uses_random_address && random_address_change) || 4479 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4480 (advertising_uses_whitelist && whitelist_modification_pending) || 4481 resolving_list_modification_pending) { 4482 4483 advertising_stop = true; 4484 } 4485 } 4486 #endif 4487 4488 4489 // Phase 2: stop everything that should be off during modifications 4490 4491 #ifdef ENABLE_LE_CENTRAL 4492 if (scanning_stop){ 4493 hci_stack->le_scanning_active = false; 4494 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4495 return true; 4496 } 4497 #endif 4498 4499 #ifdef ENABLE_LE_CENTRAL 4500 if (connecting_stop){ 4501 hci_send_cmd(&hci_le_create_connection_cancel); 4502 return true; 4503 } 4504 #endif 4505 4506 #ifdef ENABLE_LE_PERIPHERAL 4507 if (advertising_stop){ 4508 hci_stack->le_advertisements_active = false; 4509 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4510 return true; 4511 } 4512 #endif 4513 4514 // Phase 3: modify 4515 4516 if (random_address_change){ 4517 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4518 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4519 return true; 4520 } 4521 4522 #ifdef ENABLE_LE_CENTRAL 4523 if (hci_stack->le_scanning_param_update){ 4524 hci_stack->le_scanning_param_update = false; 4525 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4526 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4527 return true; 4528 } 4529 #endif 4530 4531 #ifdef ENABLE_LE_PERIPHERAL 4532 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4533 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4534 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4535 hci_send_cmd(&hci_le_set_advertising_parameters, 4536 hci_stack->le_advertisements_interval_min, 4537 hci_stack->le_advertisements_interval_max, 4538 hci_stack->le_advertisements_type, 4539 hci_stack->le_advertisements_own_addr_type, 4540 hci_stack->le_advertisements_direct_address_type, 4541 hci_stack->le_advertisements_direct_address, 4542 hci_stack->le_advertisements_channel_map, 4543 hci_stack->le_advertisements_filter_policy); 4544 return true; 4545 } 4546 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4547 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4548 uint8_t adv_data_clean[31]; 4549 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4550 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4551 hci_stack->le_advertisements_data_len); 4552 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4553 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4554 return true; 4555 } 4556 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4557 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4558 uint8_t scan_data_clean[31]; 4559 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4560 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4561 hci_stack->le_scan_response_data_len); 4562 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4563 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4564 return true; 4565 } 4566 #endif 4567 4568 4569 #ifdef ENABLE_LE_CENTRAL 4570 // if connect with whitelist was active and is not cancelled yet, wait until next time 4571 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4572 #endif 4573 4574 // LE Whitelist Management 4575 if (whitelist_modification_pending){ 4576 // add/remove entries 4577 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4578 while (btstack_linked_list_iterator_has_next(&lit)){ 4579 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4580 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4581 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4582 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4583 return true; 4584 } 4585 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4586 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4587 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4588 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4589 return true; 4590 } 4591 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4592 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4593 btstack_memory_whitelist_entry_free(entry); 4594 } 4595 } 4596 } 4597 4598 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4599 // LE Resolving List Management 4600 if (resolving_list_supported) { 4601 uint16_t i; 4602 switch (hci_stack->le_resolving_list_state) { 4603 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4604 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4605 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4606 return true; 4607 case LE_RESOLVING_LIST_READ_SIZE: 4608 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4609 hci_send_cmd(&hci_le_read_resolving_list_size); 4610 return true; 4611 case LE_RESOLVING_LIST_SEND_CLEAR: 4612 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4613 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4614 sizeof(hci_stack->le_resolving_list_add_entries)); 4615 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4616 sizeof(hci_stack->le_resolving_list_remove_entries)); 4617 hci_send_cmd(&hci_le_clear_resolving_list); 4618 return true; 4619 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4620 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4621 uint8_t offset = i >> 3; 4622 uint8_t mask = 1 << (i & 7); 4623 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4624 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4625 bd_addr_t peer_identity_addreses; 4626 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4627 sm_key_t peer_irk; 4628 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4629 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4630 4631 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4632 // trigger whitelist entry 'update' (work around for controller bug) 4633 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4634 while (btstack_linked_list_iterator_has_next(&lit)) { 4635 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4636 if (entry->address_type != peer_identity_addr_type) continue; 4637 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4638 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4639 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4640 } 4641 #endif 4642 4643 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4644 peer_identity_addreses); 4645 return true; 4646 } 4647 4648 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4649 4650 /* fall through */ 4651 4652 case LE_RESOLVING_LIST_ADD_ENTRIES: 4653 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4654 uint8_t offset = i >> 3; 4655 uint8_t mask = 1 << (i & 7); 4656 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4657 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4658 bd_addr_t peer_identity_addreses; 4659 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4660 sm_key_t peer_irk; 4661 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4662 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4663 const uint8_t *local_irk = gap_get_persistent_irk(); 4664 // command uses format specifier 'P' that stores 16-byte value without flip 4665 uint8_t local_irk_flipped[16]; 4666 uint8_t peer_irk_flipped[16]; 4667 reverse_128(local_irk, local_irk_flipped); 4668 reverse_128(peer_irk, peer_irk_flipped); 4669 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4670 peer_irk_flipped, local_irk_flipped); 4671 return true; 4672 } 4673 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4674 break; 4675 4676 default: 4677 break; 4678 } 4679 } 4680 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4681 #endif 4682 4683 // Phase 4: restore state 4684 4685 #ifdef ENABLE_LE_CENTRAL 4686 // re-start scanning 4687 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4688 hci_stack->le_scanning_active = true; 4689 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4690 return true; 4691 } 4692 #endif 4693 4694 #ifdef ENABLE_LE_CENTRAL 4695 // re-start connecting 4696 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4697 bd_addr_t null_addr; 4698 memset(null_addr, 0, 6); 4699 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4700 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4701 hci_send_cmd(&hci_le_create_connection, 4702 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4703 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4704 1, // use whitelist 4705 0, // peer address type 4706 null_addr, // peer bd addr 4707 hci_stack->le_connection_own_addr_type, // our addr type: 4708 hci_stack->le_connection_interval_min, // conn interval min 4709 hci_stack->le_connection_interval_max, // conn interval max 4710 hci_stack->le_connection_latency, // conn latency 4711 hci_stack->le_supervision_timeout, // conn latency 4712 hci_stack->le_minimum_ce_length, // min ce length 4713 hci_stack->le_maximum_ce_length // max ce length 4714 ); 4715 return true; 4716 } 4717 #endif 4718 4719 #ifdef ENABLE_LE_PERIPHERAL 4720 // re-start advertising 4721 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4722 // check if advertisements should be enabled given 4723 hci_stack->le_advertisements_active = true; 4724 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4725 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4726 return true; 4727 } 4728 #endif 4729 4730 return false; 4731 } 4732 #endif 4733 4734 static bool hci_run_general_pending_commands(void){ 4735 btstack_linked_item_t * it; 4736 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4737 hci_connection_t * connection = (hci_connection_t *) it; 4738 4739 switch(connection->state){ 4740 case SEND_CREATE_CONNECTION: 4741 switch(connection->address_type){ 4742 #ifdef ENABLE_CLASSIC 4743 case BD_ADDR_TYPE_ACL: 4744 log_info("sending hci_create_connection"); 4745 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4746 break; 4747 #endif 4748 default: 4749 #ifdef ENABLE_BLE 4750 #ifdef ENABLE_LE_CENTRAL 4751 log_info("sending hci_le_create_connection"); 4752 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4753 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4754 hci_send_cmd(&hci_le_create_connection, 4755 hci_stack->le_connection_scan_interval, // conn scan interval 4756 hci_stack->le_connection_scan_window, // conn scan windows 4757 0, // don't use whitelist 4758 connection->address_type, // peer address type 4759 connection->address, // peer bd addr 4760 hci_stack->le_connection_own_addr_type, // our addr type: 4761 hci_stack->le_connection_interval_min, // conn interval min 4762 hci_stack->le_connection_interval_max, // conn interval max 4763 hci_stack->le_connection_latency, // conn latency 4764 hci_stack->le_supervision_timeout, // conn latency 4765 hci_stack->le_minimum_ce_length, // min ce length 4766 hci_stack->le_maximum_ce_length // max ce length 4767 ); 4768 connection->state = SENT_CREATE_CONNECTION; 4769 #endif 4770 #endif 4771 break; 4772 } 4773 return true; 4774 4775 #ifdef ENABLE_CLASSIC 4776 case RECEIVED_CONNECTION_REQUEST: 4777 connection->role = HCI_ROLE_SLAVE; 4778 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4779 log_info("sending hci_accept_connection_request"); 4780 connection->state = ACCEPTED_CONNECTION_REQUEST; 4781 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4782 } 4783 return true; 4784 #endif 4785 4786 #ifdef ENABLE_BLE 4787 #ifdef ENABLE_LE_CENTRAL 4788 case SEND_CANCEL_CONNECTION: 4789 connection->state = SENT_CANCEL_CONNECTION; 4790 hci_send_cmd(&hci_le_create_connection_cancel); 4791 return true; 4792 #endif 4793 #endif 4794 case SEND_DISCONNECT: 4795 connection->state = SENT_DISCONNECT; 4796 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4797 return true; 4798 4799 default: 4800 break; 4801 } 4802 4803 // no further commands if connection is about to get shut down 4804 if (connection->state == SENT_DISCONNECT) continue; 4805 4806 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4807 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4808 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4809 return true; 4810 } 4811 4812 #ifdef ENABLE_CLASSIC 4813 4814 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4815 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4816 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4817 return true; 4818 } 4819 4820 // Handling link key request requires remote supported features 4821 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4822 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4823 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4824 4825 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4826 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4827 if (have_link_key && security_level_sufficient){ 4828 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4829 } else { 4830 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4831 } 4832 return true; 4833 } 4834 4835 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4836 log_info("denying to pin request"); 4837 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4838 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4839 return true; 4840 } 4841 4842 // security assessment requires remote features 4843 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4844 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4845 hci_ssp_assess_security_on_io_cap_request(connection); 4846 // 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 4847 } 4848 4849 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4850 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4851 // set authentication requirements: 4852 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4853 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4854 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4855 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4856 authreq |= 1; 4857 } 4858 bool bonding = hci_stack->bondable; 4859 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4860 // if we have received IO Cap Response, we're in responder role 4861 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4862 if (bonding && !remote_bonding){ 4863 log_info("Remote not bonding, dropping local flag"); 4864 bonding = false; 4865 } 4866 } 4867 if (bonding){ 4868 if (connection->bonding_flags & BONDING_DEDICATED){ 4869 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4870 } else { 4871 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4872 } 4873 } 4874 uint8_t have_oob_data = 0; 4875 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4876 if (connection->classic_oob_c_192 != NULL){ 4877 have_oob_data |= 1; 4878 } 4879 if (connection->classic_oob_c_256 != NULL){ 4880 have_oob_data |= 2; 4881 } 4882 #endif 4883 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4884 return true; 4885 } 4886 4887 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4888 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4889 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4890 return true; 4891 } 4892 4893 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4894 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4895 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4896 const uint8_t zero[16] = { 0 }; 4897 const uint8_t * r_192 = zero; 4898 const uint8_t * c_192 = zero; 4899 const uint8_t * r_256 = zero; 4900 const uint8_t * c_256 = zero; 4901 // verify P-256 OOB 4902 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4903 c_256 = connection->classic_oob_c_256; 4904 if (connection->classic_oob_r_256 != NULL) { 4905 r_256 = connection->classic_oob_r_256; 4906 } 4907 } 4908 // verify P-192 OOB 4909 if ((connection->classic_oob_c_192 != NULL)) { 4910 c_192 = connection->classic_oob_c_192; 4911 if (connection->classic_oob_r_192 != NULL) { 4912 r_192 = connection->classic_oob_r_192; 4913 } 4914 } 4915 4916 // assess security 4917 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4918 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4919 if (need_level_4 && !can_reach_level_4){ 4920 log_info("Level 4 required, but not possible -> abort"); 4921 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4922 // send oob negative reply 4923 c_256 = NULL; 4924 c_192 = NULL; 4925 } 4926 4927 // Reply 4928 if (c_256 != zero) { 4929 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4930 } else if (c_192 != zero){ 4931 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4932 } else { 4933 hci_stack->classic_oob_con_handle = connection->con_handle; 4934 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4935 } 4936 return true; 4937 } 4938 #endif 4939 4940 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4941 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4942 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4943 return true; 4944 } 4945 4946 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4947 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4948 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4949 return true; 4950 } 4951 4952 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4953 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4954 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4955 return true; 4956 } 4957 4958 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4959 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4960 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4961 connection->state = SENT_DISCONNECT; 4962 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4963 return true; 4964 } 4965 4966 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4967 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4968 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4969 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4970 return true; 4971 } 4972 4973 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4974 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4975 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4976 return true; 4977 } 4978 4979 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4980 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4981 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4982 return true; 4983 } 4984 4985 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4986 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4987 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4988 return true; 4989 } 4990 4991 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4992 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4993 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4994 return true; 4995 } 4996 4997 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4998 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4999 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5000 return true; 5001 } 5002 #endif 5003 5004 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5005 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5006 #ifdef ENABLE_CLASSIC 5007 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5008 #endif 5009 if (connection->state != SENT_DISCONNECT){ 5010 connection->state = SENT_DISCONNECT; 5011 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5012 return true; 5013 } 5014 } 5015 5016 #ifdef ENABLE_CLASSIC 5017 uint16_t sniff_min_interval; 5018 switch (connection->sniff_min_interval){ 5019 case 0: 5020 break; 5021 case 0xffff: 5022 connection->sniff_min_interval = 0; 5023 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5024 return true; 5025 default: 5026 sniff_min_interval = connection->sniff_min_interval; 5027 connection->sniff_min_interval = 0; 5028 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5029 return true; 5030 } 5031 5032 if (connection->sniff_subrating_max_latency != 0xffff){ 5033 uint16_t max_latency = connection->sniff_subrating_max_latency; 5034 connection->sniff_subrating_max_latency = 0; 5035 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5036 return true; 5037 } 5038 5039 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5040 uint8_t service_type = (uint8_t) connection->qos_service_type; 5041 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5042 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); 5043 return true; 5044 } 5045 5046 if (connection->request_role != HCI_ROLE_INVALID){ 5047 hci_role_t role = connection->request_role; 5048 connection->request_role = HCI_ROLE_INVALID; 5049 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5050 return true; 5051 } 5052 #endif 5053 5054 #ifdef ENABLE_BLE 5055 switch (connection->le_con_parameter_update_state){ 5056 // response to L2CAP CON PARAMETER UPDATE REQUEST 5057 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5058 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5059 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5060 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5061 0x0000, 0xffff); 5062 return true; 5063 case CON_PARAMETER_UPDATE_REPLY: 5064 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5065 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5066 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5067 0x0000, 0xffff); 5068 return true; 5069 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5070 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5071 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5072 return true; 5073 default: 5074 break; 5075 } 5076 if (connection->le_phy_update_all_phys != 0xffu){ 5077 uint8_t all_phys = connection->le_phy_update_all_phys; 5078 connection->le_phy_update_all_phys = 0xff; 5079 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); 5080 return true; 5081 } 5082 #endif 5083 } 5084 return false; 5085 } 5086 5087 static void hci_run(void){ 5088 5089 // stack state sub statemachines 5090 switch (hci_stack->state) { 5091 case HCI_STATE_INITIALIZING: 5092 hci_initializing_run(); 5093 break; 5094 case HCI_STATE_HALTING: 5095 hci_halting_run(); 5096 break; 5097 case HCI_STATE_FALLING_ASLEEP: 5098 hci_falling_asleep_run(); 5099 break; 5100 default: 5101 break; 5102 } 5103 5104 bool done; 5105 5106 // send continuation fragments first, as they block the prepared packet buffer 5107 done = hci_run_acl_fragments(); 5108 if (done) return; 5109 5110 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5111 // send host num completed packets next as they don't require num_cmd_packets > 0 5112 if (!hci_can_send_comand_packet_transport()) return; 5113 if (hci_stack->host_completed_packets){ 5114 hci_host_num_completed_packets(); 5115 return; 5116 } 5117 #endif 5118 5119 if (!hci_can_send_command_packet_now()) return; 5120 5121 // global/non-connection oriented commands 5122 5123 5124 #ifdef ENABLE_CLASSIC 5125 // general gap classic 5126 done = hci_run_general_gap_classic(); 5127 if (done) return; 5128 #endif 5129 5130 #ifdef ENABLE_BLE 5131 // general gap le 5132 done = hci_run_general_gap_le(); 5133 if (done) return; 5134 #endif 5135 5136 // send pending HCI commands 5137 hci_run_general_pending_commands(); 5138 } 5139 5140 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5141 // house-keeping 5142 5143 #ifdef ENABLE_CLASSIC 5144 bd_addr_t addr; 5145 hci_connection_t * conn; 5146 #endif 5147 #ifdef ENABLE_LE_CENTRAL 5148 uint8_t initiator_filter_policy; 5149 #endif 5150 5151 uint16_t opcode = little_endian_read_16(packet, 0); 5152 switch (opcode) { 5153 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5154 hci_stack->loopback_mode = packet[3]; 5155 break; 5156 5157 #ifdef ENABLE_CLASSIC 5158 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5159 reverse_bd_addr(&packet[3], addr); 5160 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5161 5162 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5163 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5164 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5165 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5166 } 5167 5168 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5169 if (!conn) { 5170 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5171 if (!conn) { 5172 // notify client that alloc failed 5173 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5174 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5175 } 5176 conn->state = SEND_CREATE_CONNECTION; 5177 conn->role = HCI_ROLE_MASTER; 5178 } 5179 5180 conn->con_handle = HCI_CON_HANDLE_INVALID; 5181 conn->role = HCI_ROLE_INVALID; 5182 5183 log_info("conn state %u", conn->state); 5184 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5185 switch (conn->state) { 5186 // if connection active exists 5187 case OPEN: 5188 // and OPEN, emit connection complete command 5189 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5190 // packet not sent to controller 5191 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5192 case RECEIVED_DISCONNECTION_COMPLETE: 5193 // create connection triggered in disconnect complete event, let's do it now 5194 break; 5195 case SEND_CREATE_CONNECTION: 5196 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5197 break; 5198 default: 5199 // otherwise, just ignore as it is already in the open process 5200 // packet not sent to controller 5201 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5202 } 5203 conn->state = SENT_CREATE_CONNECTION; 5204 5205 // track outgoing connection 5206 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5207 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5208 break; 5209 5210 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5211 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5212 // setup_synchronous_connection? Voice setting at offset 22 5213 // TODO: compare to current setting if sco connection already active 5214 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5215 break; 5216 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5217 // accept_synchronous_connection? Voice setting at offset 18 5218 // TODO: compare to current setting if sco connection already active 5219 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5220 break; 5221 #endif 5222 #endif 5223 5224 #ifdef ENABLE_BLE 5225 #ifdef ENABLE_LE_CENTRAL 5226 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5227 // white list used? 5228 initiator_filter_policy = packet[7]; 5229 switch (initiator_filter_policy) { 5230 case 0: 5231 // whitelist not used 5232 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5233 break; 5234 case 1: 5235 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5236 break; 5237 default: 5238 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5239 break; 5240 } 5241 // track outgoing connection 5242 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5243 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5244 break; 5245 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5246 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5247 break; 5248 #endif 5249 #endif 5250 default: 5251 break; 5252 } 5253 5254 hci_stack->num_cmd_packets--; 5255 5256 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5257 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5258 if (err != 0){ 5259 return ERROR_CODE_HARDWARE_FAILURE; 5260 } 5261 return ERROR_CODE_SUCCESS; 5262 } 5263 5264 // disconnect because of security block 5265 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5266 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5267 if (!connection) return; 5268 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5269 } 5270 5271 5272 // Configure Secure Simple Pairing 5273 5274 #ifdef ENABLE_CLASSIC 5275 5276 // enable will enable SSP during init 5277 void gap_ssp_set_enable(int enable){ 5278 hci_stack->ssp_enable = enable; 5279 } 5280 5281 static int hci_local_ssp_activated(void){ 5282 return gap_ssp_supported() && hci_stack->ssp_enable; 5283 } 5284 5285 // if set, BTstack will respond to io capability request using authentication requirement 5286 void gap_ssp_set_io_capability(int io_capability){ 5287 hci_stack->ssp_io_capability = io_capability; 5288 } 5289 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5290 hci_stack->ssp_authentication_requirement = authentication_requirement; 5291 } 5292 5293 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5294 void gap_ssp_set_auto_accept(int auto_accept){ 5295 hci_stack->ssp_auto_accept = auto_accept; 5296 } 5297 5298 void gap_secure_connections_enable(bool enable){ 5299 hci_stack->secure_connections_enable = enable; 5300 } 5301 5302 #endif 5303 5304 // va_list part of hci_send_cmd 5305 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5306 if (!hci_can_send_command_packet_now()){ 5307 log_error("hci_send_cmd called but cannot send packet now"); 5308 return ERROR_CODE_COMMAND_DISALLOWED; 5309 } 5310 5311 // for HCI INITIALIZATION 5312 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5313 hci_stack->last_cmd_opcode = cmd->opcode; 5314 5315 hci_reserve_packet_buffer(); 5316 uint8_t * packet = hci_stack->hci_packet_buffer; 5317 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5318 uint8_t status = hci_send_cmd_packet(packet, size); 5319 5320 // release packet buffer on error or for synchronous transport implementations 5321 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5322 hci_release_packet_buffer(); 5323 hci_emit_transport_packet_sent(); 5324 } 5325 5326 return status; 5327 } 5328 5329 /** 5330 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5331 */ 5332 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5333 va_list argptr; 5334 va_start(argptr, cmd); 5335 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5336 va_end(argptr); 5337 return status; 5338 } 5339 5340 // Create various non-HCI events. 5341 // TODO: generalize, use table similar to hci_create_command 5342 5343 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5344 // dump packet 5345 if (dump) { 5346 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5347 } 5348 5349 // dispatch to all event handlers 5350 btstack_linked_list_iterator_t it; 5351 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5352 while (btstack_linked_list_iterator_has_next(&it)){ 5353 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5354 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5355 } 5356 } 5357 5358 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5359 if (!hci_stack->acl_packet_handler) return; 5360 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5361 } 5362 5363 #ifdef ENABLE_CLASSIC 5364 static void hci_notify_if_sco_can_send_now(void){ 5365 // notify SCO sender if waiting 5366 if (!hci_stack->sco_waiting_for_can_send_now) return; 5367 if (hci_can_send_sco_packet_now()){ 5368 hci_stack->sco_waiting_for_can_send_now = 0; 5369 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5370 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5371 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5372 } 5373 } 5374 5375 // parsing end emitting has been merged to reduce code size 5376 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5377 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5378 5379 uint8_t * eir_data; 5380 ad_context_t context; 5381 const uint8_t * name; 5382 uint8_t name_len; 5383 5384 if (size < 3) return; 5385 5386 int event_type = hci_event_packet_get_type(packet); 5387 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5388 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5389 5390 switch (event_type){ 5391 case HCI_EVENT_INQUIRY_RESULT: 5392 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5393 if (size != (3 + (num_responses * 14))) return; 5394 break; 5395 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5396 if (size != 257) return; 5397 if (num_responses != 1) return; 5398 break; 5399 default: 5400 return; 5401 } 5402 5403 // event[1] is set at the end 5404 int i; 5405 for (i=0; i<num_responses;i++){ 5406 memset(event, 0, sizeof(event)); 5407 event[0] = GAP_EVENT_INQUIRY_RESULT; 5408 uint8_t event_size = 27; // if name is not set by EIR 5409 5410 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5411 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5412 (void)memcpy(&event[9], 5413 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5414 3); // class of device 5415 (void)memcpy(&event[12], 5416 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5417 2); // clock offset 5418 5419 switch (event_type){ 5420 case HCI_EVENT_INQUIRY_RESULT: 5421 // 14,15,16,17 = 0, size 18 5422 break; 5423 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5424 event[14] = 1; 5425 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5426 // 16,17 = 0, size 18 5427 break; 5428 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5429 event[14] = 1; 5430 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5431 // EIR packets only contain a single inquiry response 5432 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5433 name = NULL; 5434 // Iterate over EIR data 5435 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5436 uint8_t data_type = ad_iterator_get_data_type(&context); 5437 uint8_t data_size = ad_iterator_get_data_len(&context); 5438 const uint8_t * data = ad_iterator_get_data(&context); 5439 // Prefer Complete Local Name over Shortened Local Name 5440 switch (data_type){ 5441 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5442 if (name) continue; 5443 /* fall through */ 5444 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5445 name = data; 5446 name_len = data_size; 5447 break; 5448 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5449 if (data_size != 8) break; 5450 event[16] = 1; 5451 memcpy(&event[17], data, 8); 5452 break; 5453 default: 5454 break; 5455 } 5456 } 5457 if (name){ 5458 event[25] = 1; 5459 // truncate name if needed 5460 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5461 event[26] = len; 5462 (void)memcpy(&event[27], name, len); 5463 event_size += len; 5464 } 5465 break; 5466 default: 5467 return; 5468 } 5469 event[1] = event_size - 2; 5470 hci_emit_event(event, event_size, 1); 5471 } 5472 } 5473 #endif 5474 5475 void hci_emit_state(void){ 5476 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5477 uint8_t event[3]; 5478 event[0] = BTSTACK_EVENT_STATE; 5479 event[1] = sizeof(event) - 2u; 5480 event[2] = hci_stack->state; 5481 hci_emit_event(event, sizeof(event), 1); 5482 } 5483 5484 #ifdef ENABLE_CLASSIC 5485 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5486 uint8_t event[13]; 5487 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5488 event[1] = sizeof(event) - 2; 5489 event[2] = status; 5490 little_endian_store_16(event, 3, con_handle); 5491 reverse_bd_addr(address, &event[5]); 5492 event[11] = 1; // ACL connection 5493 event[12] = 0; // encryption disabled 5494 hci_emit_event(event, sizeof(event), 1); 5495 } 5496 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5497 if (disable_l2cap_timeouts) return; 5498 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5499 uint8_t event[4]; 5500 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5501 event[1] = sizeof(event) - 2; 5502 little_endian_store_16(event, 2, conn->con_handle); 5503 hci_emit_event(event, sizeof(event), 1); 5504 } 5505 #endif 5506 5507 #ifdef ENABLE_BLE 5508 #ifdef ENABLE_LE_CENTRAL 5509 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){ 5510 uint8_t event[21]; 5511 event[0] = HCI_EVENT_LE_META; 5512 event[1] = sizeof(event) - 2u; 5513 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5514 event[3] = status; 5515 little_endian_store_16(event, 4, con_handle); 5516 event[6] = 0; // TODO: role 5517 event[7] = address_type; 5518 reverse_bd_addr(address, &event[8]); 5519 little_endian_store_16(event, 14, 0); // interval 5520 little_endian_store_16(event, 16, 0); // latency 5521 little_endian_store_16(event, 18, 0); // supervision timeout 5522 event[20] = 0; // master clock accuracy 5523 hci_emit_event(event, sizeof(event), 1); 5524 } 5525 #endif 5526 #endif 5527 5528 static void hci_emit_transport_packet_sent(void){ 5529 // notify upper stack that it might be possible to send again 5530 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5531 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5532 } 5533 5534 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5535 uint8_t event[6]; 5536 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5537 event[1] = sizeof(event) - 2u; 5538 event[2] = 0; // status = OK 5539 little_endian_store_16(event, 3, con_handle); 5540 event[5] = reason; 5541 hci_emit_event(event, sizeof(event), 1); 5542 } 5543 5544 static void hci_emit_nr_connections_changed(void){ 5545 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5546 uint8_t event[3]; 5547 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5548 event[1] = sizeof(event) - 2u; 5549 event[2] = nr_hci_connections(); 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 static void hci_emit_hci_open_failed(void){ 5554 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5555 uint8_t event[2]; 5556 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5557 event[1] = sizeof(event) - 2u; 5558 hci_emit_event(event, sizeof(event), 1); 5559 } 5560 5561 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5562 log_info("hci_emit_dedicated_bonding_result %u ", status); 5563 uint8_t event[9]; 5564 int pos = 0; 5565 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5566 event[pos++] = sizeof(event) - 2u; 5567 event[pos++] = status; 5568 reverse_bd_addr(address, &event[pos]); 5569 hci_emit_event(event, sizeof(event), 1); 5570 } 5571 5572 5573 #ifdef ENABLE_CLASSIC 5574 5575 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5576 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5577 uint8_t event[5]; 5578 int pos = 0; 5579 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5580 event[pos++] = sizeof(event) - 2; 5581 little_endian_store_16(event, 2, con_handle); 5582 pos += 2; 5583 event[pos++] = level; 5584 hci_emit_event(event, sizeof(event), 1); 5585 } 5586 5587 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5588 if (!connection) return LEVEL_0; 5589 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5590 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5591 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5592 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5593 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5594 // LEVEL 4 always requires 128 bit encrytion key size 5595 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5596 security_level = LEVEL_3; 5597 } 5598 return security_level; 5599 } 5600 5601 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5602 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5603 uint8_t event[3]; 5604 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5605 event[1] = sizeof(event) - 2; 5606 event[2] = enabled; 5607 hci_emit_event(event, sizeof(event), 1); 5608 } 5609 5610 // query if remote side supports eSCO 5611 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5612 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5613 if (!connection) return false; 5614 return (connection->remote_supported_features[0] & 1) != 0; 5615 } 5616 5617 static bool hci_ssp_supported(hci_connection_t * connection){ 5618 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5619 return (connection->bonding_flags & mask) == mask; 5620 } 5621 5622 // query if remote side supports SSP 5623 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5624 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5625 if (!connection) return false; 5626 return hci_ssp_supported(connection) ? 1 : 0; 5627 } 5628 5629 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5630 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5631 } 5632 5633 /** 5634 * Check if remote supported features query has completed 5635 */ 5636 bool hci_remote_features_available(hci_con_handle_t handle){ 5637 hci_connection_t * connection = hci_connection_for_handle(handle); 5638 if (!connection) return false; 5639 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5640 } 5641 5642 /** 5643 * Trigger remote supported features query 5644 */ 5645 5646 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5647 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5648 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5649 } 5650 } 5651 5652 void hci_remote_features_query(hci_con_handle_t con_handle){ 5653 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5654 if (!connection) return; 5655 hci_trigger_remote_features_for_connection(connection); 5656 hci_run(); 5657 } 5658 5659 // GAP API 5660 /** 5661 * @bbrief enable/disable bonding. default is enabled 5662 * @praram enabled 5663 */ 5664 void gap_set_bondable_mode(int enable){ 5665 hci_stack->bondable = enable ? 1 : 0; 5666 } 5667 /** 5668 * @brief Get bondable mode. 5669 * @return 1 if bondable 5670 */ 5671 int gap_get_bondable_mode(void){ 5672 return hci_stack->bondable; 5673 } 5674 5675 /** 5676 * @brief map link keys to security levels 5677 */ 5678 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5679 switch (link_key_type){ 5680 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5681 return LEVEL_4; 5682 case COMBINATION_KEY: 5683 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5684 return LEVEL_3; 5685 default: 5686 return LEVEL_2; 5687 } 5688 } 5689 5690 /** 5691 * @brief map link keys to secure connection yes/no 5692 */ 5693 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5694 switch (link_key_type){ 5695 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5696 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5697 return 1; 5698 default: 5699 return 0; 5700 } 5701 } 5702 5703 /** 5704 * @brief map link keys to authenticated 5705 */ 5706 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5707 switch (link_key_type){ 5708 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5709 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5710 return 1; 5711 default: 5712 return 0; 5713 } 5714 } 5715 5716 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5717 log_info("gap_mitm_protection_required_for_security_level %u", level); 5718 return level > LEVEL_2; 5719 } 5720 5721 /** 5722 * @brief get current security level 5723 */ 5724 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5725 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5726 if (!connection) return LEVEL_0; 5727 return gap_security_level_for_connection(connection); 5728 } 5729 5730 /** 5731 * @brief request connection to device to 5732 * @result GAP_AUTHENTICATION_RESULT 5733 */ 5734 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5735 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5736 if (!connection){ 5737 hci_emit_security_level(con_handle, LEVEL_0); 5738 return; 5739 } 5740 5741 btstack_assert(hci_is_le_connection(connection) == false); 5742 5743 // 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) 5744 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5745 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5746 requested_level = LEVEL_4; 5747 } 5748 5749 gap_security_level_t current_level = gap_security_level(con_handle); 5750 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5751 requested_level, connection->requested_security_level, current_level); 5752 5753 // authentication active if authentication request was sent or planned level > 0 5754 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5755 if (authentication_active){ 5756 // authentication already active 5757 if (connection->requested_security_level < requested_level){ 5758 // increase requested level as new level is higher 5759 // TODO: handle re-authentication when done 5760 connection->requested_security_level = requested_level; 5761 } 5762 } else { 5763 // no request active, notify if security sufficient 5764 if (requested_level <= current_level){ 5765 hci_emit_security_level(con_handle, current_level); 5766 return; 5767 } 5768 5769 // store request 5770 connection->requested_security_level = requested_level; 5771 5772 // request remote features if not already active 5773 hci_remote_features_query(con_handle); 5774 5775 // start to authenticate connection 5776 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5777 hci_run(); 5778 } 5779 } 5780 5781 /** 5782 * @brief start dedicated bonding with device. disconnect after bonding 5783 * @param device 5784 * @param request MITM protection 5785 * @result GAP_DEDICATED_BONDING_COMPLETE 5786 */ 5787 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5788 5789 // create connection state machine 5790 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5791 5792 if (!connection){ 5793 return BTSTACK_MEMORY_ALLOC_FAILED; 5794 } 5795 5796 // delete linkn key 5797 gap_drop_link_key_for_bd_addr(device); 5798 5799 // configure LEVEL_2/3, dedicated bonding 5800 connection->state = SEND_CREATE_CONNECTION; 5801 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5802 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5803 connection->bonding_flags = BONDING_DEDICATED; 5804 5805 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5806 5807 // handle: connnection failure (connection complete != ok) 5808 // handle: authentication failure 5809 // handle: disconnect on done 5810 5811 hci_run(); 5812 5813 return 0; 5814 } 5815 5816 void gap_set_local_name(const char * local_name){ 5817 hci_stack->local_name = local_name; 5818 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5819 // also update EIR if not set by user 5820 if (hci_stack->eir_data == NULL){ 5821 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5822 } 5823 hci_run(); 5824 } 5825 #endif 5826 5827 5828 #ifdef ENABLE_BLE 5829 5830 #ifdef ENABLE_LE_CENTRAL 5831 void gap_start_scan(void){ 5832 hci_stack->le_scanning_enabled = true; 5833 hci_run(); 5834 } 5835 5836 void gap_stop_scan(void){ 5837 hci_stack->le_scanning_enabled = false; 5838 hci_run(); 5839 } 5840 5841 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5842 hci_stack->le_scan_type = scan_type; 5843 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5844 hci_stack->le_scan_interval = scan_interval; 5845 hci_stack->le_scan_window = scan_window; 5846 hci_stack->le_scanning_param_update = true; 5847 hci_run(); 5848 } 5849 5850 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5851 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5852 } 5853 5854 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5855 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5856 if (!conn){ 5857 // disallow if le connection is already outgoing 5858 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5859 log_error("le connection already active"); 5860 return ERROR_CODE_COMMAND_DISALLOWED; 5861 } 5862 5863 log_info("gap_connect: no connection exists yet, creating context"); 5864 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5865 if (!conn){ 5866 // notify client that alloc failed 5867 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5868 log_info("gap_connect: failed to alloc hci_connection_t"); 5869 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5870 } 5871 5872 // set le connecting state 5873 if (hci_is_le_connection_type(addr_type)){ 5874 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5875 } 5876 5877 conn->state = SEND_CREATE_CONNECTION; 5878 log_info("gap_connect: send create connection next"); 5879 hci_run(); 5880 return ERROR_CODE_SUCCESS; 5881 } 5882 5883 if (!hci_is_le_connection(conn) || 5884 (conn->state == SEND_CREATE_CONNECTION) || 5885 (conn->state == SENT_CREATE_CONNECTION)) { 5886 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5887 log_error("gap_connect: classic connection or connect is already being created"); 5888 return GATT_CLIENT_IN_WRONG_STATE; 5889 } 5890 5891 // check if connection was just disconnected 5892 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5893 log_info("gap_connect: send create connection (again)"); 5894 conn->state = SEND_CREATE_CONNECTION; 5895 hci_run(); 5896 return ERROR_CODE_SUCCESS; 5897 } 5898 5899 log_info("gap_connect: context exists with state %u", conn->state); 5900 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5901 hci_run(); 5902 return ERROR_CODE_SUCCESS; 5903 } 5904 5905 // @assumption: only a single outgoing LE Connection exists 5906 static hci_connection_t * gap_get_outgoing_connection(void){ 5907 btstack_linked_item_t *it; 5908 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5909 hci_connection_t * conn = (hci_connection_t *) it; 5910 if (!hci_is_le_connection(conn)) continue; 5911 switch (conn->state){ 5912 case SEND_CREATE_CONNECTION: 5913 case SENT_CREATE_CONNECTION: 5914 case SENT_CANCEL_CONNECTION: 5915 return conn; 5916 default: 5917 break; 5918 }; 5919 } 5920 return NULL; 5921 } 5922 5923 uint8_t gap_connect_cancel(void){ 5924 hci_connection_t * conn = gap_get_outgoing_connection(); 5925 if (!conn) return 0; 5926 switch (conn->state){ 5927 case SEND_CREATE_CONNECTION: 5928 // skip sending create connection and emit event instead 5929 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5930 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5931 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5932 btstack_memory_hci_connection_free( conn ); 5933 break; 5934 case SENT_CREATE_CONNECTION: 5935 // request to send cancel connection 5936 conn->state = SEND_CANCEL_CONNECTION; 5937 hci_run(); 5938 break; 5939 default: 5940 break; 5941 } 5942 return 0; 5943 } 5944 #endif 5945 5946 #ifdef ENABLE_LE_CENTRAL 5947 /** 5948 * @brief Set connection parameters for outgoing connections 5949 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5950 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5951 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5952 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5953 * @param conn_latency, default: 4 5954 * @param supervision_timeout (unit: 10ms), default: 720 ms 5955 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5956 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5957 */ 5958 5959 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5960 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5961 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5962 hci_stack->le_connection_scan_interval = conn_scan_interval; 5963 hci_stack->le_connection_scan_window = conn_scan_window; 5964 hci_stack->le_connection_interval_min = conn_interval_min; 5965 hci_stack->le_connection_interval_max = conn_interval_max; 5966 hci_stack->le_connection_latency = conn_latency; 5967 hci_stack->le_supervision_timeout = supervision_timeout; 5968 hci_stack->le_minimum_ce_length = min_ce_length; 5969 hci_stack->le_maximum_ce_length = max_ce_length; 5970 } 5971 #endif 5972 5973 /** 5974 * @brief Updates the connection parameters for a given LE connection 5975 * @param handle 5976 * @param conn_interval_min (unit: 1.25ms) 5977 * @param conn_interval_max (unit: 1.25ms) 5978 * @param conn_latency 5979 * @param supervision_timeout (unit: 10ms) 5980 * @return 0 if ok 5981 */ 5982 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5983 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5984 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5985 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5986 connection->le_conn_interval_min = conn_interval_min; 5987 connection->le_conn_interval_max = conn_interval_max; 5988 connection->le_conn_latency = conn_latency; 5989 connection->le_supervision_timeout = supervision_timeout; 5990 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5991 hci_run(); 5992 return 0; 5993 } 5994 5995 /** 5996 * @brief Request an update of the connection parameter for a given LE connection 5997 * @param handle 5998 * @param conn_interval_min (unit: 1.25ms) 5999 * @param conn_interval_max (unit: 1.25ms) 6000 * @param conn_latency 6001 * @param supervision_timeout (unit: 10ms) 6002 * @return 0 if ok 6003 */ 6004 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6005 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6006 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6007 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6008 connection->le_conn_interval_min = conn_interval_min; 6009 connection->le_conn_interval_max = conn_interval_max; 6010 connection->le_conn_latency = conn_latency; 6011 connection->le_supervision_timeout = supervision_timeout; 6012 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6013 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6014 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6015 return 0; 6016 } 6017 6018 #ifdef ENABLE_LE_PERIPHERAL 6019 6020 /** 6021 * @brief Set Advertisement Data 6022 * @param advertising_data_length 6023 * @param advertising_data (max 31 octets) 6024 * @note data is not copied, pointer has to stay valid 6025 */ 6026 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6027 hci_stack->le_advertisements_data_len = advertising_data_length; 6028 hci_stack->le_advertisements_data = advertising_data; 6029 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6030 hci_run(); 6031 } 6032 6033 /** 6034 * @brief Set Scan Response Data 6035 * @param advertising_data_length 6036 * @param advertising_data (max 31 octets) 6037 * @note data is not copied, pointer has to stay valid 6038 */ 6039 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6040 hci_stack->le_scan_response_data_len = scan_response_data_length; 6041 hci_stack->le_scan_response_data = scan_response_data; 6042 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6043 hci_run(); 6044 } 6045 6046 /** 6047 * @brief Set Advertisement Parameters 6048 * @param adv_int_min 6049 * @param adv_int_max 6050 * @param adv_type 6051 * @param direct_address_type 6052 * @param direct_address 6053 * @param channel_map 6054 * @param filter_policy 6055 * 6056 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6057 */ 6058 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6059 uint8_t direct_address_typ, bd_addr_t direct_address, 6060 uint8_t channel_map, uint8_t filter_policy) { 6061 6062 hci_stack->le_advertisements_interval_min = adv_int_min; 6063 hci_stack->le_advertisements_interval_max = adv_int_max; 6064 hci_stack->le_advertisements_type = adv_type; 6065 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6066 hci_stack->le_advertisements_channel_map = channel_map; 6067 hci_stack->le_advertisements_filter_policy = filter_policy; 6068 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6069 6); 6070 6071 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6072 hci_run(); 6073 } 6074 6075 /** 6076 * @brief Enable/Disable Advertisements 6077 * @param enabled 6078 */ 6079 void gap_advertisements_enable(int enabled){ 6080 hci_stack->le_advertisements_enabled = enabled != 0; 6081 hci_update_advertisements_enabled_for_current_roles(); 6082 hci_run(); 6083 } 6084 6085 #endif 6086 6087 void hci_le_set_own_address_type(uint8_t own_address_type){ 6088 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6089 if (own_address_type == hci_stack->le_own_addr_type) return; 6090 hci_stack->le_own_addr_type = own_address_type; 6091 6092 #ifdef ENABLE_LE_PERIPHERAL 6093 // update advertisement parameters, too 6094 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6095 hci_run(); 6096 #endif 6097 #ifdef ENABLE_LE_CENTRAL 6098 // note: we don't update scan parameters or modify ongoing connection attempts 6099 #endif 6100 } 6101 6102 void hci_le_random_address_set(const bd_addr_t random_address){ 6103 memcpy(hci_stack->le_random_address, random_address, 6); 6104 hci_stack->le_random_address_set = true; 6105 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6106 hci_run(); 6107 } 6108 6109 #endif 6110 6111 uint8_t gap_disconnect(hci_con_handle_t handle){ 6112 hci_connection_t * conn = hci_connection_for_handle(handle); 6113 if (!conn){ 6114 hci_emit_disconnection_complete(handle, 0); 6115 return 0; 6116 } 6117 // ignore if already disconnected 6118 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6119 return 0; 6120 } 6121 conn->state = SEND_DISCONNECT; 6122 hci_run(); 6123 return 0; 6124 } 6125 6126 int gap_read_rssi(hci_con_handle_t con_handle){ 6127 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6128 if (hci_connection == NULL) return 0; 6129 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6130 hci_run(); 6131 return 1; 6132 } 6133 6134 /** 6135 * @brief Get connection type 6136 * @param con_handle 6137 * @result connection_type 6138 */ 6139 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6140 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6141 if (!conn) return GAP_CONNECTION_INVALID; 6142 switch (conn->address_type){ 6143 case BD_ADDR_TYPE_LE_PUBLIC: 6144 case BD_ADDR_TYPE_LE_RANDOM: 6145 return GAP_CONNECTION_LE; 6146 case BD_ADDR_TYPE_SCO: 6147 return GAP_CONNECTION_SCO; 6148 case BD_ADDR_TYPE_ACL: 6149 return GAP_CONNECTION_ACL; 6150 default: 6151 return GAP_CONNECTION_INVALID; 6152 } 6153 } 6154 6155 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6156 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6157 if (!conn) return HCI_ROLE_INVALID; 6158 return (hci_role_t) conn->role; 6159 } 6160 6161 6162 #ifdef ENABLE_CLASSIC 6163 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6164 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6165 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6166 conn->request_role = role; 6167 hci_run(); 6168 return ERROR_CODE_SUCCESS; 6169 } 6170 #endif 6171 6172 #ifdef ENABLE_BLE 6173 6174 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){ 6175 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6176 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6177 6178 conn->le_phy_update_all_phys = all_phys; 6179 conn->le_phy_update_tx_phys = tx_phys; 6180 conn->le_phy_update_rx_phys = rx_phys; 6181 conn->le_phy_update_phy_options = phy_options; 6182 6183 hci_run(); 6184 6185 return 0; 6186 } 6187 6188 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6189 // check if already in list 6190 btstack_linked_list_iterator_t it; 6191 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6192 while (btstack_linked_list_iterator_has_next(&it)) { 6193 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6194 if (entry->address_type != address_type) { 6195 continue; 6196 } 6197 if (memcmp(entry->address, address, 6) != 0) { 6198 continue; 6199 } 6200 // disallow if already scheduled to add 6201 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6202 return ERROR_CODE_COMMAND_DISALLOWED; 6203 } 6204 // still on controller, but scheduled to remove -> re-add 6205 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6206 return ERROR_CODE_SUCCESS; 6207 } 6208 // alloc and add to list 6209 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6210 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6211 entry->address_type = address_type; 6212 (void)memcpy(entry->address, address, 6); 6213 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6214 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6215 return ERROR_CODE_SUCCESS; 6216 } 6217 6218 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6219 btstack_linked_list_iterator_t it; 6220 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6221 while (btstack_linked_list_iterator_has_next(&it)){ 6222 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6223 if (entry->address_type != address_type) { 6224 continue; 6225 } 6226 if (memcmp(entry->address, address, 6) != 0) { 6227 continue; 6228 } 6229 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6230 // remove from controller if already present 6231 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6232 } else { 6233 // directly remove entry from whitelist 6234 btstack_linked_list_iterator_remove(&it); 6235 btstack_memory_whitelist_entry_free(entry); 6236 } 6237 return ERROR_CODE_SUCCESS; 6238 } 6239 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6240 } 6241 6242 static void hci_whitelist_clear(void){ 6243 btstack_linked_list_iterator_t it; 6244 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6245 while (btstack_linked_list_iterator_has_next(&it)){ 6246 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6247 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6248 // remove from controller if already present 6249 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6250 continue; 6251 } 6252 // directly remove entry from whitelist 6253 btstack_linked_list_iterator_remove(&it); 6254 btstack_memory_whitelist_entry_free(entry); 6255 } 6256 } 6257 6258 // free all entries unconditionally 6259 static void hci_whitelist_free(void){ 6260 btstack_linked_list_iterator_t lit; 6261 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6262 while (btstack_linked_list_iterator_has_next(&lit)){ 6263 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6264 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6265 btstack_memory_whitelist_entry_free(entry); 6266 } 6267 } 6268 6269 /** 6270 * @brief Clear Whitelist 6271 * @return 0 if ok 6272 */ 6273 uint8_t gap_whitelist_clear(void){ 6274 hci_whitelist_clear(); 6275 hci_run(); 6276 return ERROR_CODE_SUCCESS; 6277 } 6278 6279 /** 6280 * @brief Add Device to Whitelist 6281 * @param address_typ 6282 * @param address 6283 * @return 0 if ok 6284 */ 6285 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6286 uint8_t status = hci_whitelist_add(address_type, address); 6287 if (status){ 6288 return status; 6289 } 6290 hci_run(); 6291 return ERROR_CODE_SUCCESS; 6292 } 6293 6294 /** 6295 * @brief Remove Device from Whitelist 6296 * @param address_typ 6297 * @param address 6298 * @return 0 if ok 6299 */ 6300 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6301 uint8_t status = hci_whitelist_remove(address_type, address); 6302 if (status){ 6303 return status; 6304 } 6305 hci_run(); 6306 return ERROR_CODE_SUCCESS; 6307 } 6308 6309 #ifdef ENABLE_LE_CENTRAL 6310 /** 6311 * @brief Connect with Whitelist 6312 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6313 * @return - if ok 6314 */ 6315 uint8_t gap_connect_with_whitelist(void){ 6316 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6317 return ERROR_CODE_COMMAND_DISALLOWED; 6318 } 6319 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6320 hci_run(); 6321 return ERROR_CODE_SUCCESS; 6322 } 6323 6324 /** 6325 * @brief Auto Connection Establishment - Start Connecting to device 6326 * @param address_typ 6327 * @param address 6328 * @return 0 if ok 6329 */ 6330 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6331 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6332 return ERROR_CODE_COMMAND_DISALLOWED; 6333 } 6334 6335 uint8_t status = hci_whitelist_add(address_type, address); 6336 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6337 return status; 6338 } 6339 6340 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6341 6342 hci_run(); 6343 return ERROR_CODE_SUCCESS; 6344 } 6345 6346 /** 6347 * @brief Auto Connection Establishment - Stop Connecting to device 6348 * @param address_typ 6349 * @param address 6350 * @return 0 if ok 6351 */ 6352 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6353 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6354 return ERROR_CODE_COMMAND_DISALLOWED; 6355 } 6356 6357 hci_whitelist_remove(address_type, address); 6358 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6359 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6360 } 6361 hci_run(); 6362 return 0; 6363 } 6364 6365 /** 6366 * @brief Auto Connection Establishment - Stop everything 6367 * @note Convenience function to stop all active auto connection attempts 6368 */ 6369 uint8_t gap_auto_connection_stop_all(void){ 6370 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6371 return ERROR_CODE_COMMAND_DISALLOWED; 6372 } 6373 hci_whitelist_clear(); 6374 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6375 hci_run(); 6376 return ERROR_CODE_SUCCESS; 6377 } 6378 6379 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6380 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6381 if (!conn) return 0; 6382 return conn->le_connection_interval; 6383 } 6384 #endif 6385 #endif 6386 6387 #ifdef ENABLE_CLASSIC 6388 /** 6389 * @brief Set Extended Inquiry Response data 6390 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6391 * @note has to be done before stack starts up 6392 */ 6393 void gap_set_extended_inquiry_response(const uint8_t * data){ 6394 hci_stack->eir_data = data; 6395 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6396 hci_run(); 6397 } 6398 6399 /** 6400 * @brief Start GAP Classic Inquiry 6401 * @param duration in 1.28s units 6402 * @return 0 if ok 6403 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6404 */ 6405 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6406 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6407 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6408 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6409 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6410 } 6411 hci_stack->inquiry_state = duration_in_1280ms_units; 6412 hci_run(); 6413 return 0; 6414 } 6415 6416 /** 6417 * @brief Stop GAP Classic Inquiry 6418 * @return 0 if ok 6419 */ 6420 int gap_inquiry_stop(void){ 6421 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6422 // emit inquiry complete event, before it even started 6423 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6424 hci_emit_event(event, sizeof(event), 1); 6425 return 0; 6426 } 6427 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6428 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6429 hci_run(); 6430 return 0; 6431 } 6432 6433 void gap_inquiry_set_lap(uint32_t lap){ 6434 hci_stack->inquiry_lap = lap; 6435 } 6436 6437 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6438 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6439 hci_stack->inquiry_scan_window = inquiry_scan_window; 6440 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6441 hci_run(); 6442 } 6443 6444 6445 /** 6446 * @brief Remote Name Request 6447 * @param addr 6448 * @param page_scan_repetition_mode 6449 * @param clock_offset only used when bit 15 is set 6450 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6451 */ 6452 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6453 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6454 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6455 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6456 hci_stack->remote_name_clock_offset = clock_offset; 6457 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6458 hci_run(); 6459 return 0; 6460 } 6461 6462 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6463 hci_stack->gap_pairing_state = state; 6464 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6465 hci_run(); 6466 return 0; 6467 } 6468 6469 /** 6470 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6471 * @param addr 6472 * @param pin_data 6473 * @param pin_len 6474 * @return 0 if ok 6475 */ 6476 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6477 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6478 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6479 hci_stack->gap_pairing_pin_len = pin_len; 6480 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6481 } 6482 6483 /** 6484 * @brief Legacy Pairing Pin Code Response 6485 * @param addr 6486 * @param pin 6487 * @return 0 if ok 6488 */ 6489 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6490 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6491 } 6492 6493 /** 6494 * @brief Abort Legacy Pairing 6495 * @param addr 6496 * @param pin 6497 * @return 0 if ok 6498 */ 6499 int gap_pin_code_negative(bd_addr_t addr){ 6500 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6501 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6502 } 6503 6504 /** 6505 * @brief SSP Passkey Response 6506 * @param addr 6507 * @param passkey 6508 * @return 0 if ok 6509 */ 6510 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6511 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6512 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6513 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6514 } 6515 6516 /** 6517 * @brief Abort SSP Passkey Entry/Pairing 6518 * @param addr 6519 * @param pin 6520 * @return 0 if ok 6521 */ 6522 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6523 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6524 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6525 } 6526 6527 /** 6528 * @brief Accept SSP Numeric Comparison 6529 * @param addr 6530 * @param passkey 6531 * @return 0 if ok 6532 */ 6533 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6534 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6535 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6536 } 6537 6538 /** 6539 * @brief Abort SSP Numeric Comparison/Pairing 6540 * @param addr 6541 * @param pin 6542 * @return 0 if ok 6543 */ 6544 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6545 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6546 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6547 } 6548 6549 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6550 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6551 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6552 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6553 connectionSetAuthenticationFlags(conn, flag); 6554 hci_run(); 6555 return ERROR_CODE_SUCCESS; 6556 } 6557 #endif 6558 6559 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6560 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6561 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6562 } 6563 6564 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6565 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6566 } 6567 #endif 6568 6569 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6570 /** 6571 * @brief Report Remote OOB Data 6572 * @param bd_addr 6573 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6574 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6575 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6576 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6577 */ 6578 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){ 6579 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6580 if (connection == NULL) { 6581 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6582 } 6583 connection->classic_oob_c_192 = c_192; 6584 connection->classic_oob_r_192 = r_192; 6585 6586 // ignore P-256 if not supported by us 6587 if (hci_stack->secure_connections_active){ 6588 connection->classic_oob_c_256 = c_256; 6589 connection->classic_oob_r_256 = r_256; 6590 } 6591 6592 return ERROR_CODE_SUCCESS; 6593 } 6594 /** 6595 * @brief Generate new OOB data 6596 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6597 */ 6598 void gap_ssp_generate_oob_data(void){ 6599 hci_stack->classic_read_local_oob_data = true; 6600 hci_run(); 6601 } 6602 6603 #endif 6604 6605 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6606 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6607 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6608 if (connection == NULL) { 6609 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6610 } 6611 6612 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6613 connection->link_key_type = type; 6614 6615 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6616 } 6617 6618 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6619 /** 6620 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6621 * @param inquiry_mode see bluetooth_defines.h 6622 */ 6623 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6624 hci_stack->inquiry_mode = inquiry_mode; 6625 } 6626 6627 /** 6628 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6629 */ 6630 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6631 hci_stack->sco_voice_setting = voice_setting; 6632 } 6633 6634 /** 6635 * @brief Get SCO Voice Setting 6636 * @return current voice setting 6637 */ 6638 uint16_t hci_get_sco_voice_setting(void){ 6639 return hci_stack->sco_voice_setting; 6640 } 6641 6642 static int hci_have_usb_transport(void){ 6643 if (!hci_stack->hci_transport) return 0; 6644 const char * transport_name = hci_stack->hci_transport->name; 6645 if (!transport_name) return 0; 6646 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6647 } 6648 6649 /** @brief Get SCO packet length for current SCO Voice setting 6650 * @note Using SCO packets of the exact length is required for USB transfer 6651 * @return Length of SCO packets in bytes (not audio frames) 6652 */ 6653 uint16_t hci_get_sco_packet_length(void){ 6654 uint16_t sco_packet_length = 0; 6655 6656 #ifdef ENABLE_SCO_OVER_HCI 6657 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6658 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6659 6660 if (hci_have_usb_transport()){ 6661 // see Core Spec for H2 USB Transfer. 6662 // 3 byte SCO header + 24 bytes per connection 6663 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6664 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6665 } else { 6666 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6667 sco_packet_length = 3 + 60 * multiplier; 6668 // assert that it still fits inside an SCO buffer 6669 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6670 sco_packet_length = 3 + 60; 6671 } 6672 } 6673 #endif 6674 6675 #ifdef HAVE_SCO_TRANSPORT 6676 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6677 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6678 sco_packet_length = 3 + 60 * multiplier; 6679 #endif 6680 return sco_packet_length; 6681 } 6682 6683 /** 6684 * @brief Sets the master/slave policy 6685 * @param policy (0: attempt to become master, 1: let connecting device decide) 6686 */ 6687 void hci_set_master_slave_policy(uint8_t policy){ 6688 hci_stack->master_slave_policy = policy; 6689 } 6690 6691 #endif 6692 6693 HCI_STATE hci_get_state(void){ 6694 return hci_stack->state; 6695 } 6696 6697 #ifdef ENABLE_CLASSIC 6698 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6699 hci_stack->gap_classic_accept_callback = accept_callback; 6700 } 6701 #endif 6702 6703 /** 6704 * @brief Set callback for Bluetooth Hardware Error 6705 */ 6706 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6707 hci_stack->hardware_error_callback = fn; 6708 } 6709 6710 void hci_disconnect_all(void){ 6711 btstack_linked_list_iterator_t it; 6712 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6713 while (btstack_linked_list_iterator_has_next(&it)){ 6714 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6715 if (con->state == SENT_DISCONNECT) continue; 6716 con->state = SEND_DISCONNECT; 6717 } 6718 hci_run(); 6719 } 6720 6721 uint16_t hci_get_manufacturer(void){ 6722 return hci_stack->manufacturer; 6723 } 6724 6725 #ifdef ENABLE_BLE 6726 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6727 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6728 if (!hci_con) return NULL; 6729 return &hci_con->sm_connection; 6730 } 6731 6732 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6733 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6734 #endif 6735 6736 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6737 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6738 if (hci_connection == NULL) return 0; 6739 if (hci_is_le_connection(hci_connection)){ 6740 #ifdef ENABLE_BLE 6741 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6742 if (sm_conn->sm_connection_encrypted) { 6743 return sm_conn->sm_actual_encryption_key_size; 6744 } 6745 #endif 6746 } else { 6747 #ifdef ENABLE_CLASSIC 6748 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6749 return hci_connection->encryption_key_size; 6750 } 6751 #endif 6752 } 6753 return 0; 6754 } 6755 6756 int gap_authenticated(hci_con_handle_t con_handle){ 6757 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6758 if (hci_connection == NULL) return 0; 6759 6760 switch (hci_connection->address_type){ 6761 #ifdef ENABLE_BLE 6762 case BD_ADDR_TYPE_LE_PUBLIC: 6763 case BD_ADDR_TYPE_LE_RANDOM: 6764 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6765 return hci_connection->sm_connection.sm_connection_authenticated; 6766 #endif 6767 #ifdef ENABLE_CLASSIC 6768 case BD_ADDR_TYPE_SCO: 6769 case BD_ADDR_TYPE_ACL: 6770 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6771 #endif 6772 default: 6773 return 0; 6774 } 6775 } 6776 6777 int gap_secure_connection(hci_con_handle_t con_handle){ 6778 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6779 if (hci_connection == NULL) return 0; 6780 6781 switch (hci_connection->address_type){ 6782 #ifdef ENABLE_BLE 6783 case BD_ADDR_TYPE_LE_PUBLIC: 6784 case BD_ADDR_TYPE_LE_RANDOM: 6785 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6786 return hci_connection->sm_connection.sm_connection_sc; 6787 #endif 6788 #ifdef ENABLE_CLASSIC 6789 case BD_ADDR_TYPE_SCO: 6790 case BD_ADDR_TYPE_ACL: 6791 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6792 #endif 6793 default: 6794 return 0; 6795 } 6796 } 6797 6798 bool gap_bonded(hci_con_handle_t con_handle){ 6799 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6800 if (hci_connection == NULL) return 0; 6801 6802 #ifdef ENABLE_CLASSIC 6803 link_key_t link_key; 6804 link_key_type_t link_key_type; 6805 #endif 6806 switch (hci_connection->address_type){ 6807 #ifdef ENABLE_BLE 6808 case BD_ADDR_TYPE_LE_PUBLIC: 6809 case BD_ADDR_TYPE_LE_RANDOM: 6810 return hci_connection->sm_connection.sm_le_db_index >= 0; 6811 #endif 6812 #ifdef ENABLE_CLASSIC 6813 case BD_ADDR_TYPE_SCO: 6814 case BD_ADDR_TYPE_ACL: 6815 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6816 #endif 6817 default: 6818 return false; 6819 } 6820 } 6821 6822 #ifdef ENABLE_BLE 6823 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6824 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6825 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6826 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6827 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6828 return sm_conn->sm_connection_authorization_state; 6829 } 6830 #endif 6831 6832 #ifdef ENABLE_CLASSIC 6833 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){ 6834 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6835 if (!conn) return GAP_CONNECTION_INVALID; 6836 conn->sniff_min_interval = sniff_min_interval; 6837 conn->sniff_max_interval = sniff_max_interval; 6838 conn->sniff_attempt = sniff_attempt; 6839 conn->sniff_timeout = sniff_timeout; 6840 hci_run(); 6841 return 0; 6842 } 6843 6844 /** 6845 * @brief Exit Sniff mode 6846 * @param con_handle 6847 @ @return 0 if ok 6848 */ 6849 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6850 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6851 if (!conn) return GAP_CONNECTION_INVALID; 6852 conn->sniff_min_interval = 0xffff; 6853 hci_run(); 6854 return 0; 6855 } 6856 6857 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){ 6858 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6859 if (!conn) return GAP_CONNECTION_INVALID; 6860 conn->sniff_subrating_max_latency = max_latency; 6861 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6862 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6863 hci_run(); 6864 return ERROR_CODE_SUCCESS; 6865 } 6866 6867 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){ 6868 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6869 if (!conn) return GAP_CONNECTION_INVALID; 6870 conn->qos_service_type = service_type; 6871 conn->qos_token_rate = token_rate; 6872 conn->qos_peak_bandwidth = peak_bandwidth; 6873 conn->qos_latency = latency; 6874 conn->qos_delay_variation = delay_variation; 6875 hci_run(); 6876 return ERROR_CODE_SUCCESS; 6877 } 6878 6879 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6880 hci_stack->new_page_scan_interval = page_scan_interval; 6881 hci_stack->new_page_scan_window = page_scan_window; 6882 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6883 hci_run(); 6884 } 6885 6886 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6887 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6888 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6889 hci_run(); 6890 } 6891 6892 void gap_set_page_timeout(uint16_t page_timeout){ 6893 hci_stack->page_timeout = page_timeout; 6894 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6895 hci_run(); 6896 } 6897 6898 #endif 6899 6900 void hci_halting_defer(void){ 6901 if (hci_stack->state != HCI_STATE_HALTING) return; 6902 switch (hci_stack->substate){ 6903 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6904 case HCI_HALTING_CLOSE: 6905 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6906 break; 6907 default: 6908 break; 6909 } 6910 } 6911 6912 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6913 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6914 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6915 if (le_device_db_index >= le_device_db_max_count()) return; 6916 uint8_t offset = le_device_db_index >> 3; 6917 uint8_t mask = 1 << (le_device_db_index & 7); 6918 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6919 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6920 // note: go back to remove entries, otherwise, a remove + add will skip the add 6921 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6922 } 6923 } 6924 6925 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6926 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6927 if (le_device_db_index >= le_device_db_max_count()) return; 6928 uint8_t offset = le_device_db_index >> 3; 6929 uint8_t mask = 1 << (le_device_db_index & 7); 6930 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6931 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6932 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6933 } 6934 } 6935 6936 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6937 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6938 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6939 } 6940 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6941 // restart le resolving list update 6942 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6943 } 6944 return ERROR_CODE_SUCCESS; 6945 } 6946 #endif 6947 6948 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6949 void hci_setup_test_connections_fuzz(void){ 6950 hci_connection_t * conn; 6951 6952 // default address: 66:55:44:33:00:01 6953 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6954 6955 // setup Controller info 6956 hci_stack->num_cmd_packets = 255; 6957 hci_stack->acl_packets_total_num = 255; 6958 6959 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6960 addr[5] = 0x01; 6961 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6962 conn->con_handle = addr[5]; 6963 conn->role = HCI_ROLE_SLAVE; 6964 conn->state = RECEIVED_CONNECTION_REQUEST; 6965 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6966 6967 // setup incoming Classic SCO connection with con handle 0x0002 6968 addr[5] = 0x02; 6969 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6970 conn->con_handle = addr[5]; 6971 conn->role = HCI_ROLE_SLAVE; 6972 conn->state = RECEIVED_CONNECTION_REQUEST; 6973 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6974 6975 // setup ready Classic ACL connection with con handle 0x0003 6976 addr[5] = 0x03; 6977 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6978 conn->con_handle = addr[5]; 6979 conn->role = HCI_ROLE_SLAVE; 6980 conn->state = OPEN; 6981 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6982 6983 // setup ready Classic SCO connection with con handle 0x0004 6984 addr[5] = 0x04; 6985 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6986 conn->con_handle = addr[5]; 6987 conn->role = HCI_ROLE_SLAVE; 6988 conn->state = OPEN; 6989 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6990 6991 // setup ready LE ACL connection with con handle 0x005 and public address 6992 addr[5] = 0x05; 6993 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6994 conn->con_handle = addr[5]; 6995 conn->role = HCI_ROLE_SLAVE; 6996 conn->state = OPEN; 6997 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6998 conn->sm_connection.sm_connection_encrypted = 1; 6999 } 7000 7001 void hci_free_connections_fuzz(void){ 7002 btstack_linked_list_iterator_t it; 7003 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7004 while (btstack_linked_list_iterator_has_next(&it)){ 7005 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7006 btstack_linked_list_iterator_remove(&it); 7007 btstack_memory_hci_connection_free(con); 7008 } 7009 } 7010 void hci_simulate_working_fuzz(void){ 7011 hci_init_done(); 7012 hci_stack->num_cmd_packets = 255; 7013 } 7014 #endif 7015