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 MATTHIAS 24 * RINGWALD 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 HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 // reset connection state on create and on reconnect 198 // don't overwrite addr, con handle, role 199 static void hci_connection_init(hci_connection_t * conn){ 200 conn->authentication_flags = AUTH_FLAG_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 conn->request_role = HCI_ROLE_INVALID; 205 conn->sniff_subrating_max_latency = 0xffff; 206 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 207 conn->link_key_type = INVALID_LINK_KEY; 208 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 209 btstack_run_loop_set_timer_context(&conn->timeout, conn); 210 hci_connection_timestamp(conn); 211 #endif 212 conn->acl_recombination_length = 0; 213 conn->acl_recombination_pos = 0; 214 conn->num_packets_sent = 0; 215 216 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 217 #ifdef ENABLE_BLE 218 conn->le_phy_update_all_phys = 0xff; 219 #endif 220 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 221 conn->le_max_tx_octets = 27; 222 #endif 223 #ifdef ENABLE_CLASSIC_PAIRING_OOB 224 conn->classic_oob_c_192 = NULL; 225 conn->classic_oob_r_192 = NULL; 226 conn->classic_oob_c_256 = NULL; 227 conn->classic_oob_r_256 = NULL; 228 #endif 229 } 230 231 /** 232 * create connection for given address 233 * 234 * @return connection OR NULL, if no memory left 235 */ 236 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 237 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 238 239 hci_connection_t * conn = btstack_memory_hci_connection_get(); 240 if (!conn) return NULL; 241 hci_connection_init(conn); 242 243 bd_addr_copy(conn->address, addr); 244 conn->address_type = addr_type; 245 conn->con_handle = HCI_CON_HANDLE_INVALID; 246 conn->role = HCI_ROLE_INVALID; 247 248 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 249 250 return conn; 251 } 252 253 254 /** 255 * get le connection parameter range 256 * 257 * @return le connection parameter range struct 258 */ 259 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 260 *range = hci_stack->le_connection_parameter_range; 261 } 262 263 /** 264 * set le connection parameter range 265 * 266 */ 267 268 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 269 hci_stack->le_connection_parameter_range = *range; 270 } 271 272 /** 273 * @brief Test if connection parameters are inside in existing rage 274 * @param conn_interval_min (unit: 1.25ms) 275 * @param conn_interval_max (unit: 1.25ms) 276 * @param conn_latency 277 * @param supervision_timeout (unit: 10ms) 278 * @returns 1 if included 279 */ 280 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){ 281 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 282 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 283 284 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 285 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 286 287 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 288 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 289 290 return 1; 291 } 292 293 /** 294 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 295 * @note: default: 1 296 * @param max_peripheral_connections 297 */ 298 #ifdef ENABLE_LE_PERIPHERAL 299 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 300 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 301 } 302 #endif 303 304 /** 305 * get hci connections iterator 306 * 307 * @return hci connections iterator 308 */ 309 310 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 311 btstack_linked_list_iterator_init(it, &hci_stack->connections); 312 } 313 314 /** 315 * get connection for a given handle 316 * 317 * @return connection OR NULL, if not found 318 */ 319 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 320 btstack_linked_list_iterator_t it; 321 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 322 while (btstack_linked_list_iterator_has_next(&it)){ 323 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 324 if ( item->con_handle == con_handle ) { 325 return item; 326 } 327 } 328 return NULL; 329 } 330 331 /** 332 * get connection for given address 333 * 334 * @return connection OR NULL, if not found 335 */ 336 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 337 btstack_linked_list_iterator_t it; 338 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 339 while (btstack_linked_list_iterator_has_next(&it)){ 340 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 341 if (connection->address_type != addr_type) continue; 342 if (memcmp(addr, connection->address, 6) != 0) continue; 343 return connection; 344 } 345 return NULL; 346 } 347 348 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 350 } 351 352 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 353 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 354 } 355 356 #ifdef ENABLE_CLASSIC 357 358 #ifdef ENABLE_SCO_OVER_HCI 359 static int hci_number_sco_connections(void){ 360 int connections = 0; 361 btstack_linked_list_iterator_t it; 362 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 363 while (btstack_linked_list_iterator_has_next(&it)){ 364 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 365 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 366 connections++; 367 } 368 return connections; 369 } 370 #endif 371 372 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 373 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 374 #ifdef HAVE_EMBEDDED_TICK 375 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 376 // connections might be timed out 377 hci_emit_l2cap_check_timeout(connection); 378 } 379 #else 380 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 381 // connections might be timed out 382 hci_emit_l2cap_check_timeout(connection); 383 } 384 #endif 385 } 386 387 static void hci_connection_timestamp(hci_connection_t *connection){ 388 #ifdef HAVE_EMBEDDED_TICK 389 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 390 #else 391 connection->timestamp = btstack_run_loop_get_time_ms(); 392 #endif 393 } 394 395 /** 396 * add authentication flags and reset timer 397 * @note: assumes classic connection 398 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 399 */ 400 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 401 bd_addr_t addr; 402 reverse_bd_addr(bd_addr, addr); 403 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 404 if (conn) { 405 connectionSetAuthenticationFlags(conn, flags); 406 hci_connection_timestamp(conn); 407 } 408 } 409 410 static bool hci_pairing_active(hci_connection_t * hci_connection){ 411 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 412 } 413 414 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 415 if (hci_pairing_active(hci_connection)) return; 416 if (ssp){ 417 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 418 } else { 419 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 420 } 421 // if we are initiator, we have sent an HCI Authenticate Request 422 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 423 424 // if we are responder, use minimal service security level as required level 425 if (!initiator){ 426 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); 427 } 428 429 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_STARTED; 433 event[1] = 10; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = (uint8_t) ssp; 437 event[11] = (uint8_t) initiator; 438 hci_emit_event(event, sizeof(event), 1); 439 } 440 441 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 442 hci_connection->requested_security_level = LEVEL_0; 443 if (!hci_pairing_active(hci_connection)) return; 444 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 445 hci_connection->classic_oob_c_192 = NULL; 446 hci_connection->classic_oob_r_192 = NULL; 447 hci_connection->classic_oob_c_256 = NULL; 448 hci_connection->classic_oob_r_256 = NULL; 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[12]; 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 static int 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 free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num){ 594 return free_slots_le; 595 } 596 return 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. @returns 1 if successful 717 bool hci_reserve_packet_buffer(void){ 718 if (hci_stack->hci_packet_buffer_reserved) { 719 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 720 return false; 721 } 722 hci_stack->hci_packet_buffer_reserved = true; 723 return true; 724 } 725 726 void hci_release_packet_buffer(void){ 727 hci_stack->hci_packet_buffer_reserved = false; 728 } 729 730 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 731 static int hci_transport_synchronous(void){ 732 return hci_stack->hci_transport->can_send_packet_now == NULL; 733 } 734 735 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 736 737 // 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); 738 739 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 740 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 741 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 742 max_acl_data_packet_length = hci_stack->le_data_packets_length; 743 } 744 745 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 746 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 747 max_acl_data_packet_length = connection->le_max_tx_octets; 748 } 749 #endif 750 751 log_debug("hci_send_acl_packet_fragments entered"); 752 753 uint8_t status = ERROR_CODE_SUCCESS; 754 // multiple packets could be send on a synchronous HCI transport 755 while (true){ 756 757 log_debug("hci_send_acl_packet_fragments loop entered"); 758 759 // get current data 760 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 761 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 762 bool more_fragments = false; 763 764 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 765 if (current_acl_data_packet_length > max_acl_data_packet_length){ 766 more_fragments = true; 767 current_acl_data_packet_length = max_acl_data_packet_length; 768 } 769 770 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 771 if (acl_header_pos > 0u){ 772 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 773 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 774 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 775 } 776 777 // update header len 778 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 779 780 // count packet 781 connection->num_packets_sent++; 782 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 783 784 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 785 if (more_fragments){ 786 // update start of next fragment to send 787 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 788 } else { 789 // done 790 hci_stack->acl_fragmentation_pos = 0; 791 hci_stack->acl_fragmentation_total_size = 0; 792 } 793 794 // send packet 795 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 796 const int size = current_acl_data_packet_length + 4; 797 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 798 hci_stack->acl_fragmentation_tx_active = 1; 799 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 800 if (err != 0){ 801 // no error from HCI Transport expected 802 status = ERROR_CODE_HARDWARE_FAILURE; 803 } 804 805 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 806 807 // done yet? 808 if (!more_fragments) break; 809 810 // can send more? 811 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 812 } 813 814 log_debug("hci_send_acl_packet_fragments loop over"); 815 816 // release buffer now for synchronous transport 817 if (hci_transport_synchronous()){ 818 hci_stack->acl_fragmentation_tx_active = 0; 819 hci_release_packet_buffer(); 820 hci_emit_transport_packet_sent(); 821 } 822 823 return status; 824 } 825 826 // pre: caller has reserved the packet buffer 827 uint8_t hci_send_acl_packet_buffer(int size){ 828 btstack_assert(hci_stack->hci_packet_buffer_reserved); 829 830 uint8_t * packet = hci_stack->hci_packet_buffer; 831 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 832 833 // check for free places on Bluetooth module 834 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 835 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 836 hci_release_packet_buffer(); 837 hci_emit_transport_packet_sent(); 838 return BTSTACK_ACL_BUFFERS_FULL; 839 } 840 841 hci_connection_t *connection = hci_connection_for_handle( con_handle); 842 if (!connection) { 843 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 844 hci_release_packet_buffer(); 845 hci_emit_transport_packet_sent(); 846 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 847 } 848 849 #ifdef ENABLE_CLASSIC 850 hci_connection_timestamp(connection); 851 #endif 852 853 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 854 855 // setup data 856 hci_stack->acl_fragmentation_total_size = size; 857 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 858 859 return hci_send_acl_packet_fragments(connection); 860 } 861 862 #ifdef ENABLE_CLASSIC 863 // pre: caller has reserved the packet buffer 864 uint8_t hci_send_sco_packet_buffer(int size){ 865 btstack_assert(hci_stack->hci_packet_buffer_reserved); 866 867 uint8_t * packet = hci_stack->hci_packet_buffer; 868 869 // skip checks in loopback mode 870 if (!hci_stack->loopback_mode){ 871 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 872 873 // check for free places on Bluetooth module 874 if (!hci_can_send_prepared_sco_packet_now()) { 875 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 876 hci_release_packet_buffer(); 877 hci_emit_transport_packet_sent(); 878 return BTSTACK_ACL_BUFFERS_FULL; 879 } 880 881 // track send packet in connection struct 882 hci_connection_t *connection = hci_connection_for_handle( con_handle); 883 if (!connection) { 884 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 885 hci_release_packet_buffer(); 886 hci_emit_transport_packet_sent(); 887 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 888 } 889 890 if (hci_have_usb_transport()){ 891 // token used 892 hci_stack->sco_can_send_now = false; 893 } else { 894 if (hci_stack->synchronous_flow_control_enabled){ 895 connection->num_packets_sent++; 896 } else { 897 connection->sco_tx_ready--; 898 } 899 } 900 } 901 902 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 903 904 #ifdef HAVE_SCO_TRANSPORT 905 hci_stack->sco_transport->send_packet(packet, size); 906 hci_release_packet_buffer(); 907 hci_emit_transport_packet_sent(); 908 909 return 0; 910 #else 911 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 912 if (hci_transport_synchronous()){ 913 hci_release_packet_buffer(); 914 hci_emit_transport_packet_sent(); 915 } 916 917 if (err != 0){ 918 return ERROR_CODE_HARDWARE_FAILURE; 919 } 920 return ERROR_CODE_SUCCESS; 921 #endif 922 } 923 #endif 924 925 static void acl_handler(uint8_t *packet, uint16_t size){ 926 927 // get info 928 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 929 hci_connection_t *conn = hci_connection_for_handle(con_handle); 930 uint8_t acl_flags = READ_ACL_FLAGS(packet); 931 uint16_t acl_length = READ_ACL_LENGTH(packet); 932 933 // ignore non-registered handle 934 if (!conn){ 935 log_error("acl_handler called with non-registered handle %u!" , con_handle); 936 return; 937 } 938 939 // assert packet is complete 940 if ((acl_length + 4u) != size){ 941 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 942 return; 943 } 944 945 #ifdef ENABLE_CLASSIC 946 // update idle timestamp 947 hci_connection_timestamp(conn); 948 #endif 949 950 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 951 hci_stack->host_completed_packets = 1; 952 conn->num_packets_completed++; 953 #endif 954 955 // handle different packet types 956 switch (acl_flags & 0x03u) { 957 958 case 0x01: // continuation fragment 959 960 // sanity checks 961 if (conn->acl_recombination_pos == 0u) { 962 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 963 return; 964 } 965 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 966 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 967 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 968 conn->acl_recombination_pos = 0; 969 return; 970 } 971 972 // append fragment payload (header already stored) 973 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 974 &packet[4], acl_length); 975 conn->acl_recombination_pos += acl_length; 976 977 // forward complete L2CAP packet if complete. 978 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 979 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 980 // reset recombination buffer 981 conn->acl_recombination_length = 0; 982 conn->acl_recombination_pos = 0; 983 } 984 break; 985 986 case 0x02: { // first fragment 987 988 // sanity check 989 if (conn->acl_recombination_pos) { 990 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 991 conn->acl_recombination_pos = 0; 992 } 993 994 // peek into L2CAP packet! 995 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 996 997 // compare fragment size to L2CAP packet size 998 if (acl_length >= (l2cap_length + 4u)){ 999 // forward fragment as L2CAP packet 1000 hci_emit_acl_packet(packet, acl_length + 4u); 1001 } else { 1002 1003 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1004 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1005 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1006 return; 1007 } 1008 1009 // store first fragment and tweak acl length for complete package 1010 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1011 packet, acl_length + 4u); 1012 conn->acl_recombination_pos = acl_length + 4u; 1013 conn->acl_recombination_length = l2cap_length; 1014 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1015 } 1016 break; 1017 1018 } 1019 default: 1020 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1021 return; 1022 } 1023 1024 // execute main loop 1025 hci_run(); 1026 } 1027 1028 static void hci_connection_stop_timer(hci_connection_t * conn){ 1029 btstack_run_loop_remove_timer(&conn->timeout); 1030 #ifdef ENABLE_CLASSIC 1031 btstack_run_loop_remove_timer(&conn->timeout_sco); 1032 #endif 1033 } 1034 1035 static void hci_shutdown_connection(hci_connection_t *conn){ 1036 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1037 1038 #ifdef ENABLE_CLASSIC 1039 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1040 bd_addr_type_t addr_type = conn->address_type; 1041 #endif 1042 #ifdef HAVE_SCO_TRANSPORT 1043 hci_con_handle_t con_handle = conn->con_handle; 1044 #endif 1045 #endif 1046 1047 hci_connection_stop_timer(conn); 1048 1049 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1050 btstack_memory_hci_connection_free( conn ); 1051 1052 // now it's gone 1053 hci_emit_nr_connections_changed(); 1054 1055 #ifdef ENABLE_CLASSIC 1056 #ifdef ENABLE_SCO_OVER_HCI 1057 // update SCO 1058 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1059 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1060 } 1061 #endif 1062 #ifdef HAVE_SCO_TRANSPORT 1063 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1064 hci_stack->sco_transport->close(con_handle); 1065 } 1066 #endif 1067 #endif 1068 } 1069 1070 #ifdef ENABLE_CLASSIC 1071 1072 static const uint16_t packet_type_sizes[] = { 1073 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1074 HCI_ACL_DH1_SIZE, 0, 0, 0, 1075 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1076 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1077 }; 1078 static const uint8_t packet_type_feature_requirement_bit[] = { 1079 0, // 3 slot packets 1080 1, // 5 slot packets 1081 25, // EDR 2 mpbs 1082 26, // EDR 3 mbps 1083 39, // 3 slot EDR packts 1084 40, // 5 slot EDR packet 1085 }; 1086 static const uint16_t packet_type_feature_packet_mask[] = { 1087 0x0f00, // 3 slot packets 1088 0xf000, // 5 slot packets 1089 0x1102, // EDR 2 mpbs 1090 0x2204, // EDR 3 mbps 1091 0x0300, // 3 slot EDR packts 1092 0x3000, // 5 slot EDR packet 1093 }; 1094 1095 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1096 // enable packet types based on size 1097 uint16_t packet_types = 0; 1098 unsigned int i; 1099 for (i=0;i<16;i++){ 1100 if (packet_type_sizes[i] == 0) continue; 1101 if (packet_type_sizes[i] <= buffer_size){ 1102 packet_types |= 1 << i; 1103 } 1104 } 1105 // disable packet types due to missing local supported features 1106 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1107 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1108 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1109 if (feature_set) continue; 1110 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1111 packet_types &= ~packet_type_feature_packet_mask[i]; 1112 } 1113 // flip bits for "may not be used" 1114 packet_types ^= 0x3306; 1115 return packet_types; 1116 } 1117 1118 uint16_t hci_usable_acl_packet_types(void){ 1119 return hci_stack->packet_types; 1120 } 1121 #endif 1122 1123 uint8_t* hci_get_outgoing_packet_buffer(void){ 1124 // hci packet buffer is >= acl data packet length 1125 return hci_stack->hci_packet_buffer; 1126 } 1127 1128 uint16_t hci_max_acl_data_packet_length(void){ 1129 return hci_stack->acl_data_packet_length; 1130 } 1131 1132 #ifdef ENABLE_CLASSIC 1133 bool hci_extended_sco_link_supported(void){ 1134 // No. 31, byte 3, bit 7 1135 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1136 } 1137 #endif 1138 1139 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1140 // No. 54, byte 6, bit 6 1141 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1142 } 1143 1144 static int gap_ssp_supported(void){ 1145 // No. 51, byte 6, bit 3 1146 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1147 } 1148 1149 static int hci_classic_supported(void){ 1150 #ifdef ENABLE_CLASSIC 1151 // No. 37, byte 4, bit 5, = No BR/EDR Support 1152 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1153 #else 1154 return 0; 1155 #endif 1156 } 1157 1158 static int hci_le_supported(void){ 1159 #ifdef ENABLE_BLE 1160 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1161 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1162 #else 1163 return 0; 1164 #endif 1165 } 1166 1167 #ifdef ENABLE_BLE 1168 1169 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1170 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1171 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1172 } else { 1173 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1174 } 1175 } 1176 1177 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1178 *addr_type = hci_stack->le_own_addr_type; 1179 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1180 } 1181 1182 #ifdef ENABLE_LE_PERIPHERAL 1183 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1184 *addr_type = hci_stack->le_advertisements_own_addr_type; 1185 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1186 }; 1187 #endif 1188 1189 #ifdef ENABLE_LE_CENTRAL 1190 1191 /** 1192 * @brief Get own addr type and address used for LE connections (Central) 1193 */ 1194 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1195 *addr_type = hci_stack->le_connection_own_addr_type; 1196 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1197 } 1198 1199 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1200 1201 int offset = 3; 1202 int num_reports = packet[offset]; 1203 offset += 1; 1204 1205 int i; 1206 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1207 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1208 for (i=0; (i<num_reports) && (offset < size);i++){ 1209 // sanity checks on data_length: 1210 uint8_t data_length = packet[offset + 8]; 1211 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1212 if ((offset + 9u + data_length + 1u) > size) return; 1213 // setup event 1214 uint8_t event_size = 10u + data_length; 1215 int pos = 0; 1216 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1217 event[pos++] = event_size; 1218 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1219 offset += 8; 1220 pos += 8; 1221 event[pos++] = packet[offset + 1 + data_length]; // rssi 1222 event[pos++] = data_length; 1223 offset++; 1224 (void)memcpy(&event[pos], &packet[offset], data_length); 1225 pos += data_length; 1226 offset += data_length + 1u; // rssi 1227 hci_emit_event(event, pos, 1); 1228 } 1229 } 1230 #endif 1231 #endif 1232 1233 #ifdef ENABLE_BLE 1234 #ifdef ENABLE_LE_PERIPHERAL 1235 static void hci_update_advertisements_enabled_for_current_roles(void){ 1236 if (hci_stack->le_advertisements_enabled){ 1237 // get number of active le slave connections 1238 int num_slave_connections = 0; 1239 btstack_linked_list_iterator_t it; 1240 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1241 while (btstack_linked_list_iterator_has_next(&it)){ 1242 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1243 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1244 if (con->state != OPEN) continue; 1245 if (con->role != HCI_ROLE_SLAVE) continue; 1246 if (!hci_is_le_connection(con)) continue; 1247 num_slave_connections++; 1248 } 1249 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1250 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1251 } else { 1252 hci_stack->le_advertisements_enabled_for_current_roles = false; 1253 } 1254 } 1255 #endif 1256 #endif 1257 1258 #ifdef ENABLE_CLASSIC 1259 static void gap_run_set_local_name(void){ 1260 hci_reserve_packet_buffer(); 1261 uint8_t * packet = hci_stack->hci_packet_buffer; 1262 // construct HCI Command and send 1263 uint16_t opcode = hci_write_local_name.opcode; 1264 hci_stack->last_cmd_opcode = opcode; 1265 packet[0] = opcode & 0xff; 1266 packet[1] = opcode >> 8; 1267 packet[2] = DEVICE_NAME_LEN; 1268 memset(&packet[3], 0, DEVICE_NAME_LEN); 1269 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1270 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1271 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1272 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1273 // expand '00:00:00:00:00:00' in name with bd_addr 1274 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1275 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1276 } 1277 1278 static void gap_run_set_eir_data(void){ 1279 hci_reserve_packet_buffer(); 1280 uint8_t * packet = hci_stack->hci_packet_buffer; 1281 // construct HCI Command in-place and send 1282 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1283 hci_stack->last_cmd_opcode = opcode; 1284 uint16_t offset = 0; 1285 packet[offset++] = opcode & 0xff; 1286 packet[offset++] = opcode >> 8; 1287 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1288 packet[offset++] = 0; // FEC not required 1289 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1290 if (hci_stack->eir_data){ 1291 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1292 ad_context_t context; 1293 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1294 uint8_t data_type = ad_iterator_get_data_type(&context); 1295 uint8_t size = ad_iterator_get_data_len(&context); 1296 const uint8_t *data = ad_iterator_get_data(&context); 1297 // copy item 1298 packet[offset++] = size + 1; 1299 packet[offset++] = data_type; 1300 memcpy(&packet[offset], data, size); 1301 // update name item 1302 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1303 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1304 } 1305 offset += size; 1306 } 1307 } else { 1308 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1309 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1310 packet[offset++] = bytes_to_copy + 1; 1311 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1312 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1313 // expand '00:00:00:00:00:00' in name with bd_addr 1314 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1315 } 1316 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1317 } 1318 #endif 1319 1320 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1321 1322 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1323 if (!hci_stack->config) return 0; 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1325 // Limit baud rate for Broadcom chipsets to 3 mbps 1326 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1327 baud_rate = 3000000; 1328 } 1329 return baud_rate; 1330 } 1331 1332 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1333 UNUSED(ds); 1334 1335 switch (hci_stack->substate){ 1336 case HCI_INIT_W4_SEND_RESET: 1337 log_info("Resend HCI Reset"); 1338 hci_stack->substate = HCI_INIT_SEND_RESET; 1339 hci_stack->num_cmd_packets = 1; 1340 hci_run(); 1341 break; 1342 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1343 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1344 if (hci_stack->hci_transport->reset_link){ 1345 hci_stack->hci_transport->reset_link(); 1346 } 1347 1348 /* fall through */ 1349 1350 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1351 log_info("Resend HCI Reset - CSR Warm Boot"); 1352 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1353 hci_stack->num_cmd_packets = 1; 1354 hci_run(); 1355 break; 1356 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1357 if (hci_stack->hci_transport->set_baudrate){ 1358 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1359 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1360 hci_stack->hci_transport->set_baudrate(baud_rate); 1361 } 1362 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1363 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1364 if (hci_stack->hci_transport->reset_link){ 1365 log_info("Link Reset"); 1366 hci_stack->hci_transport->reset_link(); 1367 } 1368 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1369 hci_run(); 1370 } 1371 break; 1372 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1373 // otherwise continue 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1375 hci_send_cmd(&hci_read_local_supported_commands); 1376 break; 1377 default: 1378 break; 1379 } 1380 } 1381 #endif 1382 1383 static void hci_initializing_next_state(void){ 1384 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1385 } 1386 1387 // assumption: hci_can_send_command_packet_now() == true 1388 static void hci_initializing_run(void){ 1389 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1390 switch (hci_stack->substate){ 1391 case HCI_INIT_SEND_RESET: 1392 hci_state_reset(); 1393 1394 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1395 // prepare reset if command complete not received in 100ms 1396 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1397 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1398 btstack_run_loop_add_timer(&hci_stack->timeout); 1399 #endif 1400 // send command 1401 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1402 hci_send_cmd(&hci_reset); 1403 break; 1404 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1405 hci_send_cmd(&hci_read_local_version_information); 1406 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1407 break; 1408 case HCI_INIT_SEND_READ_LOCAL_NAME: 1409 hci_send_cmd(&hci_read_local_name); 1410 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1411 break; 1412 1413 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1414 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1415 hci_state_reset(); 1416 // prepare reset if command complete not received in 100ms 1417 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1418 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1419 btstack_run_loop_add_timer(&hci_stack->timeout); 1420 // send command 1421 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1422 hci_send_cmd(&hci_reset); 1423 break; 1424 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1425 hci_state_reset(); 1426 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1427 hci_send_cmd(&hci_reset); 1428 break; 1429 case HCI_INIT_SEND_BAUD_CHANGE: { 1430 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1431 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1432 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1433 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1434 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1435 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1436 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1437 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1438 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1439 btstack_run_loop_add_timer(&hci_stack->timeout); 1440 } 1441 break; 1442 } 1443 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1444 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1445 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1446 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1447 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1448 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1449 break; 1450 } 1451 case HCI_INIT_CUSTOM_INIT: 1452 // Custom initialization 1453 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1454 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1455 bool send_cmd = false; 1456 switch (hci_stack->chipset_result){ 1457 case BTSTACK_CHIPSET_VALID_COMMAND: 1458 send_cmd = true; 1459 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1460 break; 1461 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1462 send_cmd = true; 1463 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1464 log_info("CSR Warm Boot"); 1465 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1466 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1467 btstack_run_loop_add_timer(&hci_stack->timeout); 1468 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1469 && hci_stack->config 1470 && hci_stack->chipset 1471 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1472 && hci_stack->hci_transport->set_baudrate 1473 && hci_transport_uart_get_main_baud_rate()){ 1474 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1475 } else { 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1477 } 1478 break; 1479 default: 1480 break; 1481 } 1482 1483 if (send_cmd){ 1484 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1485 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1486 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1487 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1488 break; 1489 } 1490 log_info("Init script done"); 1491 1492 // Init script download on Broadcom chipsets causes: 1493 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1494 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1495 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1496 1497 // - baud rate to reset, restore UART baud rate if needed 1498 int need_baud_change = hci_stack->config 1499 && hci_stack->chipset 1500 && hci_stack->chipset->set_baudrate_command 1501 && hci_stack->hci_transport->set_baudrate 1502 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1503 if (need_baud_change) { 1504 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1505 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1506 hci_stack->hci_transport->set_baudrate(baud_rate); 1507 } 1508 1509 uint16_t bcm_delay_ms = 300; 1510 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1511 // -> Work around: wait here. 1512 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1513 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1514 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1515 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1516 btstack_run_loop_add_timer(&hci_stack->timeout); 1517 break; 1518 } 1519 } 1520 // otherwise continue 1521 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1522 hci_send_cmd(&hci_read_local_supported_commands); 1523 break; 1524 case HCI_INIT_SET_BD_ADDR: 1525 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1526 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1527 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1528 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1529 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1530 break; 1531 #endif 1532 1533 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1534 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1535 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1536 hci_send_cmd(&hci_read_local_supported_commands); 1537 break; 1538 case HCI_INIT_READ_BD_ADDR: 1539 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1540 hci_send_cmd(&hci_read_bd_addr); 1541 break; 1542 case HCI_INIT_READ_BUFFER_SIZE: 1543 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1544 hci_send_cmd(&hci_read_buffer_size); 1545 break; 1546 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1547 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1548 hci_send_cmd(&hci_read_local_supported_features); 1549 break; 1550 1551 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1552 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1553 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1554 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1555 break; 1556 case HCI_INIT_HOST_BUFFER_SIZE: 1557 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1558 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1559 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1560 break; 1561 #endif 1562 1563 case HCI_INIT_SET_EVENT_MASK: 1564 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1565 if (hci_le_supported()){ 1566 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1567 } else { 1568 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1569 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1570 } 1571 break; 1572 1573 #ifdef ENABLE_CLASSIC 1574 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1575 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1576 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1577 break; 1578 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1579 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1580 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1581 break; 1582 case HCI_INIT_WRITE_INQUIRY_MODE: 1583 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1584 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1585 break; 1586 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1587 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1588 hci_stack->secure_connections_active = true; 1589 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1590 break; 1591 case HCI_INIT_WRITE_SCAN_ENABLE: 1592 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1593 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1594 break; 1595 // only sent if ENABLE_SCO_OVER_HCI is defined 1596 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1597 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1598 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1599 break; 1600 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1601 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1602 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1603 break; 1604 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1605 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1606 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1607 #ifdef ENABLE_SCO_OVER_HCI 1608 log_info("BCM: Route SCO data via HCI transport"); 1609 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1610 #endif 1611 #ifdef ENABLE_SCO_OVER_PCM 1612 log_info("BCM: Route SCO data via PCM interface"); 1613 #ifdef ENABLE_BCM_PCM_WBS 1614 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1615 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1616 #else 1617 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1618 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1619 #endif 1620 #endif 1621 break; 1622 #ifdef ENABLE_SCO_OVER_PCM 1623 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1624 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1625 log_info("BCM: Config PCM interface for I2S"); 1626 #ifdef ENABLE_BCM_PCM_WBS 1627 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1628 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1629 #else 1630 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1631 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1632 #endif 1633 break; 1634 #endif 1635 #endif 1636 1637 #ifdef ENABLE_BLE 1638 // LE INIT 1639 case HCI_INIT_LE_READ_BUFFER_SIZE: 1640 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1641 hci_send_cmd(&hci_le_read_buffer_size); 1642 break; 1643 case HCI_INIT_LE_SET_EVENT_MASK: 1644 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1645 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1646 break; 1647 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1648 // LE Supported Host = 1, Simultaneous Host = 0 1649 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1650 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1651 break; 1652 #endif 1653 1654 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1655 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1656 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1657 hci_send_cmd(&hci_le_read_maximum_data_length); 1658 break; 1659 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1660 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1661 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1662 break; 1663 #endif 1664 1665 #ifdef ENABLE_LE_CENTRAL 1666 case HCI_INIT_READ_WHITE_LIST_SIZE: 1667 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1668 hci_send_cmd(&hci_le_read_white_list_size); 1669 break; 1670 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1671 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1672 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); 1673 break; 1674 #endif 1675 default: 1676 return; 1677 } 1678 } 1679 1680 static void hci_init_done(void){ 1681 // done. tell the app 1682 log_info("hci_init_done -> HCI_STATE_WORKING"); 1683 hci_stack->state = HCI_STATE_WORKING; 1684 hci_emit_state(); 1685 hci_run(); 1686 } 1687 1688 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1689 bool command_completed = false; 1690 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1691 uint16_t opcode = little_endian_read_16(packet,3); 1692 if (opcode == hci_stack->last_cmd_opcode){ 1693 command_completed = true; 1694 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1695 } else { 1696 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1697 } 1698 } 1699 1700 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1701 uint8_t status = packet[2]; 1702 uint16_t opcode = little_endian_read_16(packet,4); 1703 if (opcode == hci_stack->last_cmd_opcode){ 1704 if (status){ 1705 command_completed = true; 1706 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1707 } else { 1708 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1709 } 1710 } else { 1711 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1712 } 1713 } 1714 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1715 // Vendor == CSR 1716 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1717 // TODO: track actual command 1718 command_completed = true; 1719 } 1720 1721 // Vendor == Toshiba 1722 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1723 // TODO: track actual command 1724 command_completed = true; 1725 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1726 hci_stack->num_cmd_packets = 1; 1727 } 1728 #endif 1729 1730 return command_completed; 1731 } 1732 1733 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1734 1735 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1736 1737 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1738 1739 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1740 1741 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1742 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1743 // 1744 // HCI Reset 1745 // Timeout 100 ms 1746 // HCI Reset 1747 // Command Complete Reset 1748 // HCI Read Local Version Information 1749 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1750 // hang... 1751 // 1752 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1753 if (!command_completed 1754 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1755 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1756 1757 uint16_t opcode = little_endian_read_16(packet,3); 1758 if (opcode == hci_reset.opcode){ 1759 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1760 return; 1761 } 1762 } 1763 1764 // CSR & H5 1765 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1766 if (!command_completed 1767 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1768 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1769 1770 uint16_t opcode = little_endian_read_16(packet,3); 1771 if (opcode == hci_reset.opcode){ 1772 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1773 return; 1774 } 1775 } 1776 1777 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1778 // fix: Correct substate and behave as command below 1779 if (command_completed){ 1780 switch (hci_stack->substate){ 1781 case HCI_INIT_SEND_RESET: 1782 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1783 break; 1784 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1785 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1786 break; 1787 default: 1788 break; 1789 } 1790 } 1791 1792 #endif 1793 1794 if (!command_completed) return; 1795 1796 bool need_baud_change = false; 1797 bool need_addr_change = false; 1798 1799 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1800 need_baud_change = hci_stack->config 1801 && hci_stack->chipset 1802 && hci_stack->chipset->set_baudrate_command 1803 && hci_stack->hci_transport->set_baudrate 1804 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1805 1806 need_addr_change = hci_stack->custom_bd_addr_set 1807 && hci_stack->chipset 1808 && hci_stack->chipset->set_bd_addr_command; 1809 #endif 1810 1811 switch(hci_stack->substate){ 1812 1813 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1814 case HCI_INIT_SEND_RESET: 1815 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1816 // fix: just correct substate and behave as command below 1817 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1818 btstack_run_loop_remove_timer(&hci_stack->timeout); 1819 break; 1820 case HCI_INIT_W4_SEND_RESET: 1821 btstack_run_loop_remove_timer(&hci_stack->timeout); 1822 break; 1823 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1824 log_info("Received local name, need baud change %d", (int) need_baud_change); 1825 if (need_baud_change){ 1826 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1827 return; 1828 } 1829 // skip baud change 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1833 // for STLC2500D, baud rate change already happened. 1834 // for others, baud rate gets changed now 1835 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1836 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1837 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1838 hci_stack->hci_transport->set_baudrate(baud_rate); 1839 } 1840 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1841 return; 1842 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1843 btstack_run_loop_remove_timer(&hci_stack->timeout); 1844 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1845 return; 1846 case HCI_INIT_W4_CUSTOM_INIT: 1847 // repeat custom init 1848 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1849 return; 1850 #else 1851 case HCI_INIT_W4_SEND_RESET: 1852 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1853 return ; 1854 #endif 1855 1856 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1857 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1858 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1859 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1860 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1861 return; 1862 } 1863 if (need_addr_change){ 1864 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1865 return; 1866 } 1867 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1868 return; 1869 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1870 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1871 if (need_baud_change){ 1872 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1873 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1874 hci_stack->hci_transport->set_baudrate(baud_rate); 1875 } 1876 if (need_addr_change){ 1877 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1878 return; 1879 } 1880 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1881 return; 1882 case HCI_INIT_W4_SET_BD_ADDR: 1883 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1884 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1885 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1886 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1887 return; 1888 } 1889 // skipping st warm boot 1890 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1891 return; 1892 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1893 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1894 return; 1895 #endif 1896 case HCI_INIT_W4_READ_BD_ADDR: 1897 // only read buffer size if supported 1898 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1899 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1900 return; 1901 } 1902 // skipping read buffer size 1903 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1904 return; 1905 case HCI_INIT_W4_SET_EVENT_MASK: 1906 // skip Classic init commands for LE only chipsets 1907 if (!hci_classic_supported()){ 1908 #ifdef ENABLE_BLE 1909 if (hci_le_supported()){ 1910 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1911 return; 1912 } 1913 #endif 1914 log_error("Neither BR/EDR nor LE supported"); 1915 hci_init_done(); 1916 return; 1917 } 1918 if (!gap_ssp_supported()){ 1919 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1920 return; 1921 } 1922 break; 1923 #ifdef ENABLE_BLE 1924 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1925 // skip write le host if not supported (e.g. on LE only EM9301) 1926 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1927 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1928 return; 1929 1930 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1931 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1932 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1933 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1934 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1935 return; 1936 } 1937 // explicit fall through to reduce repetitions 1938 1939 #ifdef ENABLE_LE_CENTRAL 1940 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1941 #else 1942 hci_init_done(); 1943 #endif 1944 return; 1945 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1946 1947 #endif /* ENABLE_BLE */ 1948 1949 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1950 // skip write secure connections host support if not supported or disabled 1951 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1952 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1953 return; 1954 } 1955 break; 1956 1957 #ifdef ENABLE_SCO_OVER_HCI 1958 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1959 // skip write synchronous flow control if not supported 1960 if (hci_stack->local_supported_commands[0] & 0x04) break; 1961 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1962 1963 /* fall through */ 1964 1965 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1966 // skip write default erroneous data reporting if not supported 1967 if (hci_stack->local_supported_commands[0] & 0x08) break; 1968 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1969 1970 /* fall through */ 1971 1972 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1973 // skip bcm set sco pcm config on non-Broadcom chipsets 1974 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1975 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1976 1977 /* fall through */ 1978 1979 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1980 if (!hci_le_supported()){ 1981 // SKIP LE init for Classic only configuration 1982 hci_init_done(); 1983 return; 1984 } 1985 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1986 break; 1987 1988 #else /* !ENABLE_SCO_OVER_HCI */ 1989 1990 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1991 #ifdef ENABLE_SCO_OVER_PCM 1992 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1993 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1994 return; 1995 } 1996 #endif 1997 /* fall through */ 1998 1999 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2000 #ifdef ENABLE_BLE 2001 if (hci_le_supported()){ 2002 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2003 return; 2004 } 2005 #endif 2006 // SKIP LE init for Classic only configuration 2007 hci_init_done(); 2008 return; 2009 #endif /* ENABLE_SCO_OVER_HCI */ 2010 2011 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2012 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2013 // Response to command before init done state -> init done 2014 case (HCI_INIT_DONE-1): 2015 hci_init_done(); 2016 return; 2017 #endif 2018 2019 default: 2020 break; 2021 } 2022 hci_initializing_next_state(); 2023 } 2024 2025 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2026 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2027 bd_addr_t bd_address; 2028 (void)memcpy(&bd_address, conn->address, 6); 2029 2030 #ifdef ENABLE_CLASSIC 2031 // cache needed data 2032 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2033 #endif 2034 2035 // connection failed, remove entry 2036 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2037 btstack_memory_hci_connection_free( conn ); 2038 2039 #ifdef ENABLE_CLASSIC 2040 // notify client if dedicated bonding 2041 if (notify_dedicated_bonding_failed){ 2042 log_info("hci notify_dedicated_bonding_failed"); 2043 hci_emit_dedicated_bonding_result(bd_address, status); 2044 } 2045 2046 // if authentication error, also delete link key 2047 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2048 gap_drop_link_key_for_bd_addr(bd_address); 2049 } 2050 #else 2051 UNUSED(status); 2052 #endif 2053 } 2054 2055 #ifdef ENABLE_CLASSIC 2056 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2057 // SSP Controller 2058 if (features[6] & (1 << 3)){ 2059 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2060 } 2061 // eSCO 2062 if (features[3] & (1<<7)){ 2063 conn->remote_supported_features[0] |= 1; 2064 } 2065 // Extended features 2066 if (features[7] & (1<<7)){ 2067 conn->remote_supported_features[0] |= 2; 2068 } 2069 } 2070 2071 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2072 // SSP Host 2073 if (features[0] & (1 << 0)){ 2074 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2075 } 2076 // SC Host 2077 if (features[0] & (1 << 3)){ 2078 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2079 } 2080 } 2081 2082 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2083 // SC Controller 2084 if (features[1] & (1 << 0)){ 2085 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2086 } 2087 } 2088 2089 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2090 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2091 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2092 if (conn->bonding_flags & BONDING_DEDICATED){ 2093 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2094 } 2095 } 2096 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2097 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2098 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2099 } 2100 2101 #endif 2102 2103 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2104 // handle BT initialization 2105 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2106 hci_initializing_event_handler(packet, size); 2107 } 2108 2109 // help with BT sleep 2110 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2111 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2112 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2113 hci_initializing_next_state(); 2114 } 2115 } 2116 2117 #ifdef ENABLE_CLASSIC 2118 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2119 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2120 conn->encryption_key_size = encryption_key_size; 2121 2122 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2123 conn->requested_security_level = LEVEL_0; 2124 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2125 return; 2126 } 2127 2128 // Request Authentication if not already done 2129 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2130 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2131 } 2132 #endif 2133 2134 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2135 UNUSED(size); 2136 2137 uint16_t manufacturer; 2138 #ifdef ENABLE_CLASSIC 2139 hci_con_handle_t handle; 2140 hci_connection_t * conn; 2141 uint8_t status; 2142 #endif 2143 // get num cmd packets - limit to 1 to reduce complexity 2144 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2145 2146 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2147 switch (opcode){ 2148 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2149 if (packet[5]) break; 2150 // terminate, name 248 chars 2151 packet[6+248] = 0; 2152 log_info("local name: %s", &packet[6]); 2153 break; 2154 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2155 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2156 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2157 uint16_t acl_len = little_endian_read_16(packet, 6); 2158 uint16_t sco_len = packet[8]; 2159 2160 // determine usable ACL/SCO payload size 2161 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2162 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2163 2164 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2165 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2166 2167 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2168 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2169 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2170 } 2171 break; 2172 case HCI_OPCODE_HCI_READ_RSSI: 2173 if (packet[5] == ERROR_CODE_SUCCESS){ 2174 uint8_t event[5]; 2175 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2176 event[1] = 3; 2177 (void)memcpy(&event[2], &packet[6], 3); 2178 hci_emit_event(event, sizeof(event), 1); 2179 } 2180 break; 2181 #ifdef ENABLE_BLE 2182 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2183 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2184 hci_stack->le_acl_packets_total_num = packet[8]; 2185 // determine usable ACL payload size 2186 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2187 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2188 } 2189 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2190 break; 2191 #endif 2192 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2193 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2194 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2195 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2196 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); 2197 break; 2198 #endif 2199 #ifdef ENABLE_LE_CENTRAL 2200 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2201 hci_stack->le_whitelist_capacity = packet[6]; 2202 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2203 break; 2204 #endif 2205 case HCI_OPCODE_HCI_READ_BD_ADDR: 2206 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2207 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)); 2208 #ifdef ENABLE_CLASSIC 2209 if (hci_stack->link_key_db){ 2210 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2211 } 2212 #endif 2213 break; 2214 #ifdef ENABLE_CLASSIC 2215 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2216 hci_emit_discoverable_enabled(hci_stack->discoverable); 2217 break; 2218 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2219 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2220 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2221 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2222 hci_emit_event(event, sizeof(event), 1); 2223 } 2224 break; 2225 #endif 2226 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2227 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2228 2229 #ifdef ENABLE_CLASSIC 2230 // determine usable ACL packet types based on host buffer size and supported features 2231 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2232 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2233 #endif 2234 // Classic/LE 2235 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2236 break; 2237 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2238 manufacturer = little_endian_read_16(packet, 10); 2239 // map Cypress to Broadcom 2240 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2241 log_info("Treat Cypress as Broadcom"); 2242 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2243 little_endian_store_16(packet, 10, manufacturer); 2244 } 2245 hci_stack->manufacturer = manufacturer; 2246 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2247 break; 2248 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2249 hci_stack->local_supported_commands[0] = 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2258 hci_stack->local_supported_commands[1] = 2259 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2260 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2261 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2262 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2263 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2264 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2265 break; 2266 #ifdef ENABLE_CLASSIC 2267 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2268 if (packet[5]) return; 2269 hci_stack->synchronous_flow_control_enabled = 1; 2270 break; 2271 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2272 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2273 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2274 conn = hci_connection_for_handle(handle); 2275 if (conn != NULL) { 2276 uint8_t key_size = 0; 2277 if (status == 0){ 2278 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2279 log_info("Handle %04x key Size: %u", handle, key_size); 2280 } else { 2281 key_size = 1; 2282 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2283 } 2284 hci_handle_read_encryption_key_size_complete(conn, key_size); 2285 } 2286 break; 2287 // assert pairing complete event is emitted. 2288 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2289 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2290 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2291 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2292 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2293 // lookup connection by gap pairing addr 2294 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2295 if (conn == NULL) break; 2296 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2297 break; 2298 2299 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2300 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2301 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2302 uint8_t event[67]; 2303 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2304 event[1] = 65; 2305 (void)memset(&event[2], 0, 65); 2306 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2307 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2308 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2309 event[2] = 3; 2310 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2311 } else { 2312 event[2] = 1; 2313 } 2314 } 2315 hci_emit_event(event, sizeof(event), 0); 2316 break; 2317 } 2318 2319 // note: only needed if user does not provide OOB data 2320 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2321 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2322 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2323 if (conn == NULL) break; 2324 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2325 break; 2326 #endif 2327 #endif 2328 default: 2329 break; 2330 } 2331 } 2332 2333 #ifdef ENABLE_BLE 2334 static void event_handle_le_connection_complete(const uint8_t * packet){ 2335 bd_addr_t addr; 2336 bd_addr_type_t addr_type; 2337 hci_connection_t * conn; 2338 2339 // Connection management 2340 reverse_bd_addr(&packet[8], addr); 2341 addr_type = (bd_addr_type_t)packet[7]; 2342 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2343 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2344 2345 #ifdef ENABLE_LE_CENTRAL 2346 // handle error: error is reported only to the initiator -> outgoing connection 2347 if (packet[3]){ 2348 2349 // handle cancelled outgoing connection 2350 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2351 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2352 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2353 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2354 // reset state 2355 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2356 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2357 // get outgoing connection conn struct for direct connect 2358 conn = gap_get_outgoing_connection(); 2359 } 2360 2361 // outgoing le connection establishment is done 2362 if (conn){ 2363 // remove entry 2364 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2365 btstack_memory_hci_connection_free( conn ); 2366 } 2367 return; 2368 } 2369 #endif 2370 2371 // on success, both hosts receive connection complete event 2372 if (packet[6] == HCI_ROLE_MASTER){ 2373 #ifdef ENABLE_LE_CENTRAL 2374 // if we're master on an le connection, it was an outgoing connection and we're done with it 2375 // note: no hci_connection_t object exists yet for connect with whitelist 2376 if (hci_is_le_connection_type(addr_type)){ 2377 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2378 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2379 } 2380 #endif 2381 } else { 2382 #ifdef ENABLE_LE_PERIPHERAL 2383 // if we're slave, it was an incoming connection, advertisements have stopped 2384 hci_stack->le_advertisements_active = false; 2385 #endif 2386 } 2387 2388 // LE connections are auto-accepted, so just create a connection if there isn't one already 2389 if (!conn){ 2390 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2391 } 2392 2393 // no memory, sorry. 2394 if (!conn){ 2395 return; 2396 } 2397 2398 conn->state = OPEN; 2399 conn->role = packet[6]; 2400 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2401 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2402 2403 #ifdef ENABLE_LE_PERIPHERAL 2404 if (packet[6] == HCI_ROLE_SLAVE){ 2405 hci_update_advertisements_enabled_for_current_roles(); 2406 } 2407 #endif 2408 2409 // init unenhanced att bearer mtu 2410 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2411 conn->att_connection.mtu_exchanged = false; 2412 2413 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2414 2415 // restart timer 2416 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2417 // btstack_run_loop_add_timer(&conn->timeout); 2418 2419 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2420 2421 hci_emit_nr_connections_changed(); 2422 } 2423 #endif 2424 2425 #ifdef ENABLE_CLASSIC 2426 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){ 2427 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2428 // LEVEL_4 is tested by l2cap 2429 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2430 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2431 if (level >= LEVEL_3){ 2432 // MITM not possible without keyboard or display 2433 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2434 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2435 2436 // MITM possible if one side has keyboard and the other has keyboard or display 2437 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2438 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2439 2440 // MITM not possible if one side has only display and other side has no keyboard 2441 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2442 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2443 } 2444 // LEVEL 2 requires SSP, which is a given 2445 return true; 2446 } 2447 2448 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2449 uint16_t i; 2450 for (i=0; i < size ; i++){ 2451 if (data[i] != 0) { 2452 return false; 2453 } 2454 } 2455 return true; 2456 } 2457 2458 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2459 // get requested security level 2460 gap_security_level_t requested_security_level = conn->requested_security_level; 2461 if (hci_stack->gap_secure_connections_only_mode){ 2462 requested_security_level = LEVEL_4; 2463 } 2464 2465 // assess security: LEVEL 4 requires SC 2466 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2467 if ((requested_security_level == LEVEL_4) && 2468 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2469 !hci_remote_sc_enabled(conn)){ 2470 log_info("Level 4 required, but SC not supported -> abort"); 2471 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2472 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2473 return; 2474 } 2475 2476 // assess security based on io capabilities 2477 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2478 // responder: fully validate io caps of both sides as well as OOB data 2479 bool security_possible = false; 2480 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2481 2482 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2483 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2484 // so we merge the OOB data availability 2485 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2486 if (conn->classic_oob_c_192 != NULL){ 2487 have_oob_data |= 1; 2488 } 2489 if (conn->classic_oob_c_256 != NULL){ 2490 have_oob_data |= 2; 2491 } 2492 // for up to Level 3, either P-192 as well as P-256 will do 2493 // 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 2494 // if remote does not SC, we should not receive P-256 data either 2495 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2496 security_possible = true; 2497 } 2498 // for Level 4, P-256 is needed 2499 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2500 security_possible = true; 2501 } 2502 #endif 2503 2504 if (security_possible == false){ 2505 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2506 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2507 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2508 return; 2509 } 2510 } else { 2511 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2512 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2513 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2514 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2515 log_info("Level 3+ required, but no input/output -> abort"); 2516 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2517 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2518 return; 2519 } 2520 #endif 2521 #endif 2522 } 2523 2524 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2525 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2526 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2527 } else { 2528 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2529 } 2530 #endif 2531 } 2532 2533 #endif 2534 2535 static void event_handler(uint8_t *packet, uint16_t size){ 2536 2537 uint16_t event_length = packet[1]; 2538 2539 // assert packet is complete 2540 if (size != (event_length + 2u)){ 2541 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2542 return; 2543 } 2544 2545 bd_addr_type_t addr_type; 2546 hci_con_handle_t handle; 2547 hci_connection_t * conn; 2548 int i; 2549 int create_connection_cmd; 2550 2551 #ifdef ENABLE_CLASSIC 2552 hci_link_type_t link_type; 2553 bd_addr_t addr; 2554 #endif 2555 2556 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2557 2558 switch (hci_event_packet_get_type(packet)) { 2559 2560 case HCI_EVENT_COMMAND_COMPLETE: 2561 handle_command_complete_event(packet, size); 2562 break; 2563 2564 case HCI_EVENT_COMMAND_STATUS: 2565 // get num cmd packets - limit to 1 to reduce complexity 2566 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2567 2568 // check command status to detected failed outgoing connections 2569 create_connection_cmd = 0; 2570 #ifdef ENABLE_CLASSIC 2571 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2572 create_connection_cmd = 1; 2573 } 2574 #endif 2575 #ifdef ENABLE_LE_CENTRAL 2576 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2577 create_connection_cmd = 1; 2578 } 2579 #endif 2580 if (create_connection_cmd) { 2581 uint8_t status = hci_event_command_status_get_status(packet); 2582 addr_type = hci_stack->outgoing_addr_type; 2583 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2584 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); 2585 2586 // reset outgoing address info 2587 memset(hci_stack->outgoing_addr, 0, 6); 2588 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2589 2590 // on error 2591 if (status != ERROR_CODE_SUCCESS){ 2592 #ifdef ENABLE_LE_CENTRAL 2593 if (hci_is_le_connection_type(addr_type)){ 2594 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2595 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2596 } 2597 #endif 2598 // error => outgoing connection failed 2599 if (conn != NULL){ 2600 hci_handle_connection_failed(conn, status); 2601 } 2602 } 2603 } 2604 2605 #ifdef ENABLE_CLASSIC 2606 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2607 uint8_t status = hci_event_command_status_get_status(packet); 2608 log_info("command status (inquiry), status %x", status); 2609 if (status == ERROR_CODE_SUCCESS) { 2610 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2611 } else { 2612 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2613 } 2614 } 2615 #endif 2616 break; 2617 2618 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2619 if (size < 3) return; 2620 uint16_t num_handles = packet[2]; 2621 if (size != (3u + num_handles * 4u)) return; 2622 uint16_t offset = 3; 2623 for (i=0; i<num_handles;i++){ 2624 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2625 offset += 2u; 2626 uint16_t num_packets = little_endian_read_16(packet, offset); 2627 offset += 2u; 2628 2629 conn = hci_connection_for_handle(handle); 2630 if (!conn){ 2631 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2632 continue; 2633 } 2634 2635 if (conn->num_packets_sent >= num_packets){ 2636 conn->num_packets_sent -= num_packets; 2637 } else { 2638 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2639 conn->num_packets_sent = 0; 2640 } 2641 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2642 2643 #ifdef ENABLE_CLASSIC 2644 // For SCO, we do the can_send_now_check here 2645 hci_notify_if_sco_can_send_now(); 2646 #endif 2647 } 2648 break; 2649 } 2650 2651 #ifdef ENABLE_CLASSIC 2652 case HCI_EVENT_INQUIRY_COMPLETE: 2653 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2654 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2655 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2656 hci_emit_event(event, sizeof(event), 1); 2657 } 2658 break; 2659 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2660 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2661 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2662 } 2663 break; 2664 case HCI_EVENT_CONNECTION_REQUEST: 2665 reverse_bd_addr(&packet[2], addr); 2666 link_type = (hci_link_type_t) packet[11]; 2667 2668 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2669 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2670 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2671 bd_addr_copy(hci_stack->decline_addr, addr); 2672 break; 2673 } 2674 2675 if (hci_stack->gap_classic_accept_callback != NULL){ 2676 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2677 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2678 bd_addr_copy(hci_stack->decline_addr, addr); 2679 break; 2680 } 2681 } 2682 2683 // TODO: eval COD 8-10 2684 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2685 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2686 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2687 if (!conn) { 2688 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2689 } 2690 if (!conn) { 2691 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2692 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2693 bd_addr_copy(hci_stack->decline_addr, addr); 2694 break; 2695 } 2696 conn->role = HCI_ROLE_SLAVE; 2697 conn->state = RECEIVED_CONNECTION_REQUEST; 2698 // store info about eSCO 2699 if (link_type == HCI_LINK_TYPE_ESCO){ 2700 conn->remote_supported_features[0] |= 1; 2701 } 2702 hci_run(); 2703 break; 2704 2705 case HCI_EVENT_CONNECTION_COMPLETE: 2706 // Connection management 2707 reverse_bd_addr(&packet[5], addr); 2708 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2709 addr_type = BD_ADDR_TYPE_ACL; 2710 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2711 if (conn) { 2712 if (!packet[2]){ 2713 conn->state = OPEN; 2714 conn->con_handle = little_endian_read_16(packet, 3); 2715 2716 // queue get remote feature 2717 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2718 2719 // queue set supervision timeout if we're master 2720 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2721 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2722 } 2723 2724 // restart timer 2725 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2726 btstack_run_loop_add_timer(&conn->timeout); 2727 2728 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2729 2730 hci_emit_nr_connections_changed(); 2731 } else { 2732 // connection failed 2733 hci_handle_connection_failed(conn, packet[2]); 2734 } 2735 } 2736 break; 2737 2738 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2739 reverse_bd_addr(&packet[5], addr); 2740 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2741 if (packet[2]){ 2742 // connection failed 2743 break; 2744 } 2745 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2746 if (!conn) { 2747 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2748 } 2749 if (!conn) { 2750 break; 2751 } 2752 conn->state = OPEN; 2753 conn->con_handle = little_endian_read_16(packet, 3); 2754 2755 #ifdef ENABLE_SCO_OVER_HCI 2756 // update SCO 2757 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2758 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2759 } 2760 // trigger can send now 2761 if (hci_have_usb_transport()){ 2762 hci_stack->sco_can_send_now = true; 2763 } 2764 #endif 2765 #ifdef HAVE_SCO_TRANSPORT 2766 // configure sco transport 2767 if (hci_stack->sco_transport != NULL){ 2768 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2769 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2770 } 2771 #endif 2772 break; 2773 2774 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2775 handle = little_endian_read_16(packet, 3); 2776 conn = hci_connection_for_handle(handle); 2777 if (!conn) break; 2778 if (!packet[2]){ 2779 const uint8_t * features = &packet[5]; 2780 hci_handle_remote_features_page_0(conn, features); 2781 2782 // read extended features if possible 2783 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2784 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2785 break; 2786 } 2787 } 2788 hci_handle_remote_features_received(conn); 2789 break; 2790 2791 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2792 handle = little_endian_read_16(packet, 3); 2793 conn = hci_connection_for_handle(handle); 2794 if (!conn) break; 2795 // status = ok, page = 1 2796 if (!packet[2]) { 2797 uint8_t page_number = packet[5]; 2798 uint8_t maximum_page_number = packet[6]; 2799 const uint8_t * features = &packet[7]; 2800 bool done = false; 2801 switch (page_number){ 2802 case 1: 2803 hci_handle_remote_features_page_1(conn, features); 2804 if (maximum_page_number >= 2){ 2805 // get Secure Connections (Controller) from Page 2 if available 2806 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2807 } else { 2808 // otherwise, assume SC (Controller) == SC (Host) 2809 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2810 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2811 } 2812 done = true; 2813 } 2814 break; 2815 case 2: 2816 hci_handle_remote_features_page_2(conn, features); 2817 done = true; 2818 break; 2819 default: 2820 break; 2821 } 2822 if (!done) break; 2823 } 2824 hci_handle_remote_features_received(conn); 2825 break; 2826 2827 case HCI_EVENT_LINK_KEY_REQUEST: 2828 // request handled by hci_run() 2829 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2830 break; 2831 2832 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2833 hci_event_link_key_request_get_bd_addr(packet, addr); 2834 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2835 if (!conn) break; 2836 2837 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2838 2839 // CVE-2020-26555: ignore NULL link key 2840 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2841 if (btstack_is_null(&packet[8], 16)) break; 2842 2843 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2844 // Change Connection Encryption keeps link key type 2845 if (link_key_type != CHANGED_COMBINATION_KEY){ 2846 conn->link_key_type = link_key_type; 2847 } 2848 2849 // cache link key. link keys stored in little-endian format for legacy reasons 2850 memcpy(&conn->link_key, &packet[8], 16); 2851 2852 // only store link key: 2853 // - if bondable enabled 2854 if (hci_stack->bondable == false) break; 2855 // - if security level sufficient 2856 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2857 // - for SSP, also check if remote side requested bonding as well 2858 if (conn->link_key_type != COMBINATION_KEY){ 2859 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2860 if (!remote_bonding){ 2861 break; 2862 } 2863 } 2864 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2865 break; 2866 } 2867 2868 case HCI_EVENT_PIN_CODE_REQUEST: 2869 hci_event_pin_code_request_get_bd_addr(packet, addr); 2870 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2871 if (!conn) break; 2872 2873 hci_pairing_started(conn, false); 2874 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2875 if (!hci_stack->bondable ){ 2876 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2877 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2878 hci_run(); 2879 return; 2880 } 2881 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2882 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2883 log_info("Level 4 required, but SC not supported -> abort"); 2884 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2885 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2886 hci_run(); 2887 return; 2888 } 2889 break; 2890 2891 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2892 hci_event_io_capability_response_get_bd_addr(packet, addr); 2893 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2894 if (!conn) break; 2895 2896 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2897 hci_pairing_started(conn, true); 2898 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2899 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2900 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2901 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2902 #endif 2903 break; 2904 2905 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2906 hci_event_io_capability_response_get_bd_addr(packet, addr); 2907 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2908 if (!conn) break; 2909 2910 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2911 hci_connection_timestamp(conn); 2912 hci_pairing_started(conn, true); 2913 break; 2914 2915 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2916 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2917 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2918 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2919 if (!conn) break; 2920 2921 hci_connection_timestamp(conn); 2922 2923 hci_pairing_started(conn, true); 2924 2925 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2926 break; 2927 #endif 2928 2929 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2930 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2931 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2932 if (!conn) break; 2933 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2934 if (hci_stack->ssp_auto_accept){ 2935 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2936 }; 2937 } else { 2938 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2940 // don't forward event to app 2941 hci_run(); 2942 return; 2943 } 2944 break; 2945 2946 case HCI_EVENT_USER_PASSKEY_REQUEST: 2947 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2948 if (hci_stack->ssp_auto_accept){ 2949 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2950 }; 2951 break; 2952 2953 case HCI_EVENT_MODE_CHANGE: 2954 handle = hci_event_mode_change_get_handle(packet); 2955 conn = hci_connection_for_handle(handle); 2956 if (!conn) break; 2957 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2958 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2959 break; 2960 #endif 2961 2962 case HCI_EVENT_ENCRYPTION_CHANGE: 2963 handle = hci_event_encryption_change_get_connection_handle(packet); 2964 conn = hci_connection_for_handle(handle); 2965 if (!conn) break; 2966 if (hci_event_encryption_change_get_status(packet) == 0u) { 2967 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2968 if (encryption_enabled){ 2969 if (hci_is_le_connection(conn)){ 2970 // For LE, we accept connection as encrypted 2971 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2972 } 2973 #ifdef ENABLE_CLASSIC 2974 else { 2975 2976 // dedicated bonding: send result and disconnect 2977 if (conn->bonding_flags & BONDING_DEDICATED){ 2978 conn->bonding_flags &= ~BONDING_DEDICATED; 2979 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2980 conn->bonding_status = packet[2]; 2981 break; 2982 } 2983 2984 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2985 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2986 bool connected_uses_aes_ccm = encryption_enabled == 2; 2987 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2988 log_info("SC during pairing, but only E0 now -> abort"); 2989 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2990 break; 2991 } 2992 2993 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2994 if (connected_uses_aes_ccm){ 2995 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2996 } 2997 2998 #ifdef ENABLE_TESTING_SUPPORT 2999 // work around for issue with PTS dongle 3000 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3001 #endif 3002 3003 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3004 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3005 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3006 } else { 3007 // if not, pretend everything is perfect 3008 hci_handle_read_encryption_key_size_complete(conn, 16); 3009 } 3010 } 3011 #endif 3012 } else { 3013 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3014 } 3015 } 3016 3017 break; 3018 3019 #ifdef ENABLE_CLASSIC 3020 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3021 handle = hci_event_authentication_complete_get_connection_handle(packet); 3022 conn = hci_connection_for_handle(handle); 3023 if (!conn) break; 3024 3025 // clear authentication active flag 3026 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3027 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3028 3029 // authenticated only if auth status == 0 3030 if (hci_event_authentication_complete_get_status(packet) == 0){ 3031 // authenticated 3032 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3033 3034 // If not already encrypted, start encryption 3035 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3036 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3037 break; 3038 } 3039 } 3040 3041 // emit updated security level 3042 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3043 break; 3044 3045 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3046 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3047 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3048 if (!conn) break; 3049 3050 // treat successfully paired connection as authenticated 3051 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3052 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3053 } 3054 3055 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3056 break; 3057 #endif 3058 3059 // HCI_EVENT_DISCONNECTION_COMPLETE 3060 // has been split, to first notify stack before shutting connection down 3061 // see end of function, too. 3062 case HCI_EVENT_DISCONNECTION_COMPLETE: 3063 if (packet[2]) break; // status != 0 3064 handle = little_endian_read_16(packet, 3); 3065 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3066 if (hci_stack->acl_fragmentation_total_size > 0u) { 3067 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3068 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3069 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3070 hci_stack->acl_fragmentation_total_size = 0; 3071 hci_stack->acl_fragmentation_pos = 0; 3072 if (release_buffer){ 3073 hci_release_packet_buffer(); 3074 } 3075 } 3076 } 3077 3078 conn = hci_connection_for_handle(handle); 3079 if (!conn) break; 3080 #ifdef ENABLE_CLASSIC 3081 // pairing failed if it was ongoing 3082 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3083 #endif 3084 3085 // emit dedicatd bonding event 3086 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3087 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3088 } 3089 3090 // mark connection for shutdown, stop timers, reset state 3091 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3092 hci_connection_stop_timer(conn); 3093 hci_connection_init(conn); 3094 3095 #ifdef ENABLE_BLE 3096 #ifdef ENABLE_LE_PERIPHERAL 3097 // re-enable advertisements for le connections if active 3098 if (hci_is_le_connection(conn)){ 3099 hci_update_advertisements_enabled_for_current_roles(); 3100 } 3101 #endif 3102 #endif 3103 break; 3104 3105 case HCI_EVENT_HARDWARE_ERROR: 3106 log_error("Hardware Error: 0x%02x", packet[2]); 3107 if (hci_stack->hardware_error_callback){ 3108 (*hci_stack->hardware_error_callback)(packet[2]); 3109 } else { 3110 // if no special requests, just reboot stack 3111 hci_power_control_off(); 3112 hci_power_control_on(); 3113 } 3114 break; 3115 3116 #ifdef ENABLE_CLASSIC 3117 case HCI_EVENT_ROLE_CHANGE: 3118 if (packet[2]) break; // status != 0 3119 reverse_bd_addr(&packet[3], addr); 3120 addr_type = BD_ADDR_TYPE_ACL; 3121 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3122 if (!conn) break; 3123 conn->role = packet[9]; 3124 break; 3125 #endif 3126 3127 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3128 // release packet buffer only for asynchronous transport and if there are not further fragements 3129 if (hci_transport_synchronous()) { 3130 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3131 return; // instead of break: to avoid re-entering hci_run() 3132 } 3133 hci_stack->acl_fragmentation_tx_active = 0; 3134 if (hci_stack->acl_fragmentation_total_size) break; 3135 hci_release_packet_buffer(); 3136 3137 // L2CAP receives this event via the hci_emit_event below 3138 3139 #ifdef ENABLE_CLASSIC 3140 // For SCO, we do the can_send_now_check here 3141 hci_notify_if_sco_can_send_now(); 3142 #endif 3143 break; 3144 3145 #ifdef ENABLE_CLASSIC 3146 case HCI_EVENT_SCO_CAN_SEND_NOW: 3147 // For SCO, we do the can_send_now_check here 3148 hci_stack->sco_can_send_now = true; 3149 hci_notify_if_sco_can_send_now(); 3150 return; 3151 3152 // explode inquriy results for easier consumption 3153 case HCI_EVENT_INQUIRY_RESULT: 3154 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3155 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3156 gap_inquiry_explode(packet, size); 3157 break; 3158 #endif 3159 3160 #ifdef ENABLE_BLE 3161 case HCI_EVENT_LE_META: 3162 switch (packet[2]){ 3163 #ifdef ENABLE_LE_CENTRAL 3164 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3165 // log_info("advertising report received"); 3166 if (!hci_stack->le_scanning_enabled) break; 3167 le_handle_advertisement_report(packet, size); 3168 break; 3169 #endif 3170 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3171 event_handle_le_connection_complete(packet); 3172 break; 3173 3174 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3175 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3176 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3177 conn = hci_connection_for_handle(handle); 3178 if (!conn) break; 3179 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3180 break; 3181 3182 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3183 // connection 3184 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3185 conn = hci_connection_for_handle(handle); 3186 if (conn) { 3187 // read arguments 3188 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3189 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3190 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3191 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3192 3193 // validate against current connection parameter range 3194 le_connection_parameter_range_t existing_range; 3195 gap_get_connection_parameter_range(&existing_range); 3196 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3197 if (update_parameter){ 3198 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3199 conn->le_conn_interval_min = le_conn_interval_min; 3200 conn->le_conn_interval_max = le_conn_interval_max; 3201 conn->le_conn_latency = le_conn_latency; 3202 conn->le_supervision_timeout = le_supervision_timeout; 3203 } else { 3204 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3205 } 3206 } 3207 break; 3208 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3209 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3210 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3211 conn = hci_connection_for_handle(handle); 3212 if (conn) { 3213 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3214 } 3215 break; 3216 #endif 3217 default: 3218 break; 3219 } 3220 break; 3221 #endif 3222 case HCI_EVENT_VENDOR_SPECIFIC: 3223 // Vendor specific commands often create vendor specific event instead of num completed packets 3224 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3225 switch (hci_stack->manufacturer){ 3226 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3227 hci_stack->num_cmd_packets = 1; 3228 break; 3229 default: 3230 break; 3231 } 3232 break; 3233 default: 3234 break; 3235 } 3236 3237 handle_event_for_current_stack_state(packet, size); 3238 3239 // notify upper stack 3240 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3241 3242 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3243 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3244 handle = little_endian_read_16(packet, 3); 3245 hci_connection_t * aConn = hci_connection_for_handle(handle); 3246 // discard connection if app did not trigger a reconnect in the event handler 3247 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3248 hci_shutdown_connection(aConn); 3249 } 3250 } 3251 3252 // execute main loop 3253 hci_run(); 3254 } 3255 3256 #ifdef ENABLE_CLASSIC 3257 3258 #ifdef ENABLE_SCO_OVER_HCI 3259 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3260 static void sco_schedule_tx(hci_connection_t * conn); 3261 3262 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3263 log_debug("SCO TX Timeout"); 3264 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3265 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3266 if (!conn) return; 3267 3268 // trigger send 3269 conn->sco_tx_ready = 1; 3270 // extra packet if CVSD but SCO buffer is too short 3271 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3272 conn->sco_tx_ready++; 3273 } 3274 hci_notify_if_sco_can_send_now(); 3275 } 3276 3277 3278 #define SCO_TX_AFTER_RX_MS (6) 3279 3280 static void sco_schedule_tx(hci_connection_t * conn){ 3281 3282 uint32_t now = btstack_run_loop_get_time_ms(); 3283 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3284 int time_delta_ms = sco_tx_ms - now; 3285 3286 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3287 3288 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3289 btstack_run_loop_remove_timer(timer); 3290 btstack_run_loop_set_timer(timer, time_delta_ms); 3291 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3292 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3293 btstack_run_loop_add_timer(timer); 3294 } 3295 #endif 3296 3297 static void sco_handler(uint8_t * packet, uint16_t size){ 3298 // lookup connection struct 3299 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3300 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3301 if (!conn) return; 3302 3303 #ifdef ENABLE_SCO_OVER_HCI 3304 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3305 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3306 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3307 packet[2] = 0x3c; 3308 memmove(&packet[3], &packet[23], 63); 3309 size = 63; 3310 } 3311 } 3312 3313 if (hci_have_usb_transport()){ 3314 // Nothing to do 3315 } else { 3316 // 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); 3317 if (hci_stack->synchronous_flow_control_enabled == 0){ 3318 uint32_t now = btstack_run_loop_get_time_ms(); 3319 3320 if (!conn->sco_rx_valid){ 3321 // ignore first 10 packets 3322 conn->sco_rx_count++; 3323 // log_debug("sco rx count %u", conn->sco_rx_count); 3324 if (conn->sco_rx_count == 10) { 3325 // use first timestamp as is and pretent it just started 3326 conn->sco_rx_ms = now; 3327 conn->sco_rx_valid = 1; 3328 conn->sco_rx_count = 0; 3329 sco_schedule_tx(conn); 3330 } 3331 } else { 3332 // track expected arrival timme 3333 conn->sco_rx_count++; 3334 conn->sco_rx_ms += 7; 3335 int delta = (int32_t) (now - conn->sco_rx_ms); 3336 if (delta > 0){ 3337 conn->sco_rx_ms++; 3338 } 3339 // log_debug("sco rx %u", conn->sco_rx_ms); 3340 sco_schedule_tx(conn); 3341 } 3342 } 3343 } 3344 #endif 3345 3346 // deliver to app 3347 if (hci_stack->sco_packet_handler) { 3348 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3349 } 3350 3351 #ifdef HAVE_SCO_TRANSPORT 3352 // We can send one packet for each received packet 3353 conn->sco_tx_ready++; 3354 hci_notify_if_sco_can_send_now(); 3355 #endif 3356 3357 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3358 conn->num_packets_completed++; 3359 hci_stack->host_completed_packets = 1; 3360 hci_run(); 3361 #endif 3362 } 3363 #endif 3364 3365 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3366 hci_dump_packet(packet_type, 1, packet, size); 3367 switch (packet_type) { 3368 case HCI_EVENT_PACKET: 3369 event_handler(packet, size); 3370 break; 3371 case HCI_ACL_DATA_PACKET: 3372 acl_handler(packet, size); 3373 break; 3374 #ifdef ENABLE_CLASSIC 3375 case HCI_SCO_DATA_PACKET: 3376 sco_handler(packet, size); 3377 break; 3378 #endif 3379 default: 3380 break; 3381 } 3382 } 3383 3384 /** 3385 * @brief Add event packet handler. 3386 */ 3387 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3388 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3389 } 3390 3391 3392 /** Register HCI packet handlers */ 3393 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3394 hci_stack->acl_packet_handler = handler; 3395 } 3396 3397 #ifdef ENABLE_CLASSIC 3398 /** 3399 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3400 */ 3401 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3402 hci_stack->sco_packet_handler = handler; 3403 } 3404 #endif 3405 3406 static void hci_state_reset(void){ 3407 // no connections yet 3408 hci_stack->connections = NULL; 3409 3410 // keep discoverable/connectable as this has been requested by the client(s) 3411 // hci_stack->discoverable = 0; 3412 // hci_stack->connectable = 0; 3413 // hci_stack->bondable = 1; 3414 // hci_stack->own_addr_type = 0; 3415 3416 // buffer is free 3417 hci_stack->hci_packet_buffer_reserved = false; 3418 3419 // no pending cmds 3420 hci_stack->decline_reason = 0; 3421 hci_stack->new_scan_enable_value = 0xff; 3422 3423 hci_stack->secure_connections_active = false; 3424 3425 #ifdef ENABLE_CLASSIC 3426 hci_stack->new_page_scan_interval = 0xffff; 3427 hci_stack->new_page_scan_window = 0xffff; 3428 hci_stack->new_page_scan_type = 0xff; 3429 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3430 hci_stack->gap_tasks = 3431 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3432 GAP_TASK_SET_CLASS_OF_DEVICE | 3433 GAP_TASK_SET_LOCAL_NAME | 3434 GAP_TASK_SET_EIR_DATA; 3435 #endif 3436 3437 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3438 hci_stack->classic_read_local_oob_data = true; 3439 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3440 #endif 3441 3442 // LE 3443 #ifdef ENABLE_BLE 3444 memset(hci_stack->le_random_address, 0, 6); 3445 hci_stack->le_random_address_set = 0; 3446 #endif 3447 #ifdef ENABLE_LE_CENTRAL 3448 hci_stack->le_scanning_active = false; 3449 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3450 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3451 hci_stack->le_whitelist_capacity = 0; 3452 #endif 3453 #ifdef ENABLE_LE_PERIPHERAL 3454 hci_stack->le_advertisements_active = false; 3455 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3456 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3457 } 3458 if (hci_stack->le_advertisements_data != NULL){ 3459 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3460 } 3461 #endif 3462 } 3463 3464 #ifdef ENABLE_CLASSIC 3465 /** 3466 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3467 */ 3468 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3469 // store and open remote device db 3470 hci_stack->link_key_db = link_key_db; 3471 if (hci_stack->link_key_db) { 3472 hci_stack->link_key_db->open(); 3473 } 3474 } 3475 #endif 3476 3477 void hci_init(const hci_transport_t *transport, const void *config){ 3478 3479 #ifdef HAVE_MALLOC 3480 if (!hci_stack) { 3481 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3482 } 3483 #else 3484 hci_stack = &hci_stack_static; 3485 #endif 3486 memset(hci_stack, 0, sizeof(hci_stack_t)); 3487 3488 // reference to use transport layer implementation 3489 hci_stack->hci_transport = transport; 3490 3491 // reference to used config 3492 hci_stack->config = config; 3493 3494 // setup pointer for outgoing packet buffer 3495 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3496 3497 // max acl payload size defined in config.h 3498 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3499 3500 // register packet handlers with transport 3501 transport->register_packet_handler(&packet_handler); 3502 3503 hci_stack->state = HCI_STATE_OFF; 3504 3505 // class of device 3506 hci_stack->class_of_device = 0x007a020c; // Smartphone 3507 3508 // bondable by default 3509 hci_stack->bondable = 1; 3510 3511 #ifdef ENABLE_CLASSIC 3512 // classic name 3513 hci_stack->local_name = default_classic_name; 3514 3515 // Master slave policy 3516 hci_stack->master_slave_policy = 1; 3517 3518 // Allow Role Switch 3519 hci_stack->allow_role_switch = 1; 3520 3521 // Default / minimum security level = 2 3522 hci_stack->gap_security_level = LEVEL_2; 3523 3524 // Default Security Mode 4 3525 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3526 3527 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3528 hci_stack->gap_required_encyrption_key_size = 7; 3529 3530 // Link Supervision Timeout 3531 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3532 3533 #endif 3534 3535 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3536 hci_stack->ssp_enable = 1; 3537 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3538 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3539 hci_stack->ssp_auto_accept = 1; 3540 3541 // Secure Connections: enable (requires support from Controller) 3542 hci_stack->secure_connections_enable = true; 3543 3544 // voice setting - signed 16 bit pcm data with CVSD over the air 3545 hci_stack->sco_voice_setting = 0x60; 3546 3547 #ifdef ENABLE_LE_CENTRAL 3548 // connection parameter to use for outgoing connections 3549 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3550 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3551 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3552 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3553 hci_stack->le_connection_latency = 4; // 4 3554 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3555 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3556 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3557 3558 // default LE Scanning 3559 hci_stack->le_scan_type = 0x1; // active 3560 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3561 hci_stack->le_scan_window = 0x30; // 30 ms 3562 #endif 3563 3564 #ifdef ENABLE_LE_PERIPHERAL 3565 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3566 #endif 3567 3568 // connection parameter range used to answer connection parameter update requests in l2cap 3569 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3570 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3571 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3572 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3573 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3574 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3575 3576 hci_state_reset(); 3577 } 3578 3579 void hci_deinit(void){ 3580 #ifdef HAVE_MALLOC 3581 if (hci_stack) { 3582 free(hci_stack); 3583 } 3584 #endif 3585 hci_stack = NULL; 3586 3587 #ifdef ENABLE_CLASSIC 3588 disable_l2cap_timeouts = 0; 3589 #endif 3590 } 3591 3592 /** 3593 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3594 */ 3595 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3596 hci_stack->chipset = chipset_driver; 3597 3598 // reset chipset driver - init is also called on power_up 3599 if (hci_stack->chipset && hci_stack->chipset->init){ 3600 hci_stack->chipset->init(hci_stack->config); 3601 } 3602 } 3603 3604 /** 3605 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3606 */ 3607 void hci_set_control(const btstack_control_t *hardware_control){ 3608 // references to used control implementation 3609 hci_stack->control = hardware_control; 3610 // init with transport config 3611 hardware_control->init(hci_stack->config); 3612 } 3613 3614 void hci_close(void){ 3615 3616 #ifdef ENABLE_CLASSIC 3617 // close remote device db 3618 if (hci_stack->link_key_db) { 3619 hci_stack->link_key_db->close(); 3620 } 3621 #endif 3622 3623 btstack_linked_list_iterator_t lit; 3624 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3625 while (btstack_linked_list_iterator_has_next(&lit)){ 3626 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3627 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3628 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3629 hci_shutdown_connection(connection); 3630 } 3631 3632 hci_power_control(HCI_POWER_OFF); 3633 3634 #ifdef HAVE_MALLOC 3635 free(hci_stack); 3636 #endif 3637 hci_stack = NULL; 3638 } 3639 3640 #ifdef HAVE_SCO_TRANSPORT 3641 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3642 hci_stack->sco_transport = sco_transport; 3643 sco_transport->register_packet_handler(&packet_handler); 3644 } 3645 #endif 3646 3647 #ifdef ENABLE_CLASSIC 3648 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3649 // validate ranage and set 3650 if (encryption_key_size < 7) return; 3651 if (encryption_key_size > 16) return; 3652 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3653 } 3654 3655 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3656 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3657 hci_stack->gap_security_mode = security_mode; 3658 return ERROR_CODE_SUCCESS; 3659 } else { 3660 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3661 } 3662 } 3663 3664 gap_security_mode_t gap_get_security_mode(void){ 3665 return hci_stack->gap_security_mode; 3666 } 3667 3668 void gap_set_security_level(gap_security_level_t security_level){ 3669 hci_stack->gap_security_level = security_level; 3670 } 3671 3672 gap_security_level_t gap_get_security_level(void){ 3673 if (hci_stack->gap_secure_connections_only_mode){ 3674 return LEVEL_4; 3675 } 3676 return hci_stack->gap_security_level; 3677 } 3678 3679 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3680 hci_stack->gap_minimal_service_security_level = security_level; 3681 } 3682 3683 void gap_set_secure_connections_only_mode(bool enable){ 3684 hci_stack->gap_secure_connections_only_mode = enable; 3685 } 3686 3687 bool gap_get_secure_connections_only_mode(void){ 3688 return hci_stack->gap_secure_connections_only_mode; 3689 } 3690 #endif 3691 3692 #ifdef ENABLE_CLASSIC 3693 void gap_set_class_of_device(uint32_t class_of_device){ 3694 hci_stack->class_of_device = class_of_device; 3695 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3696 hci_run(); 3697 } 3698 3699 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3700 hci_stack->default_link_policy_settings = default_link_policy_settings; 3701 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3702 hci_run(); 3703 } 3704 3705 void gap_set_allow_role_switch(bool allow_role_switch){ 3706 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3707 } 3708 3709 uint8_t hci_get_allow_role_switch(void){ 3710 return hci_stack->allow_role_switch; 3711 } 3712 3713 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3714 hci_stack->link_supervision_timeout = link_supervision_timeout; 3715 } 3716 3717 void hci_disable_l2cap_timeout_check(void){ 3718 disable_l2cap_timeouts = 1; 3719 } 3720 #endif 3721 3722 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3723 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3724 void hci_set_bd_addr(bd_addr_t addr){ 3725 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3726 hci_stack->custom_bd_addr_set = 1; 3727 } 3728 #endif 3729 3730 // State-Module-Driver overview 3731 // state module low-level 3732 // HCI_STATE_OFF off close 3733 // HCI_STATE_INITIALIZING, on open 3734 // HCI_STATE_WORKING, on open 3735 // HCI_STATE_HALTING, on open 3736 // HCI_STATE_SLEEPING, off/sleep close 3737 // HCI_STATE_FALLING_ASLEEP on open 3738 3739 static int hci_power_control_on(void){ 3740 3741 // power on 3742 int err = 0; 3743 if (hci_stack->control && hci_stack->control->on){ 3744 err = (*hci_stack->control->on)(); 3745 } 3746 if (err){ 3747 log_error( "POWER_ON failed"); 3748 hci_emit_hci_open_failed(); 3749 return err; 3750 } 3751 3752 // int chipset driver 3753 if (hci_stack->chipset && hci_stack->chipset->init){ 3754 hci_stack->chipset->init(hci_stack->config); 3755 } 3756 3757 // init transport 3758 if (hci_stack->hci_transport->init){ 3759 hci_stack->hci_transport->init(hci_stack->config); 3760 } 3761 3762 // open transport 3763 err = hci_stack->hci_transport->open(); 3764 if (err){ 3765 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3766 if (hci_stack->control && hci_stack->control->off){ 3767 (*hci_stack->control->off)(); 3768 } 3769 hci_emit_hci_open_failed(); 3770 return err; 3771 } 3772 return 0; 3773 } 3774 3775 static void hci_power_control_off(void){ 3776 3777 log_info("hci_power_control_off"); 3778 3779 // close low-level device 3780 hci_stack->hci_transport->close(); 3781 3782 log_info("hci_power_control_off - hci_transport closed"); 3783 3784 // power off 3785 if (hci_stack->control && hci_stack->control->off){ 3786 (*hci_stack->control->off)(); 3787 } 3788 3789 log_info("hci_power_control_off - control closed"); 3790 3791 hci_stack->state = HCI_STATE_OFF; 3792 } 3793 3794 static void hci_power_control_sleep(void){ 3795 3796 log_info("hci_power_control_sleep"); 3797 3798 #if 0 3799 // don't close serial port during sleep 3800 3801 // close low-level device 3802 hci_stack->hci_transport->close(hci_stack->config); 3803 #endif 3804 3805 // sleep mode 3806 if (hci_stack->control && hci_stack->control->sleep){ 3807 (*hci_stack->control->sleep)(); 3808 } 3809 3810 hci_stack->state = HCI_STATE_SLEEPING; 3811 } 3812 3813 static int hci_power_control_wake(void){ 3814 3815 log_info("hci_power_control_wake"); 3816 3817 // wake on 3818 if (hci_stack->control && hci_stack->control->wake){ 3819 (*hci_stack->control->wake)(); 3820 } 3821 3822 #if 0 3823 // open low-level device 3824 int err = hci_stack->hci_transport->open(hci_stack->config); 3825 if (err){ 3826 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3827 if (hci_stack->control && hci_stack->control->off){ 3828 (*hci_stack->control->off)(); 3829 } 3830 hci_emit_hci_open_failed(); 3831 return err; 3832 } 3833 #endif 3834 3835 return 0; 3836 } 3837 3838 static void hci_power_transition_to_initializing(void){ 3839 // set up state machine 3840 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3841 hci_stack->hci_packet_buffer_reserved = false; 3842 hci_stack->state = HCI_STATE_INITIALIZING; 3843 hci_stack->substate = HCI_INIT_SEND_RESET; 3844 } 3845 3846 // returns error 3847 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3848 int err; 3849 switch (power_mode){ 3850 case HCI_POWER_ON: 3851 err = hci_power_control_on(); 3852 if (err != 0) { 3853 log_error("hci_power_control_on() error %d", err); 3854 return err; 3855 } 3856 hci_power_transition_to_initializing(); 3857 break; 3858 case HCI_POWER_OFF: 3859 // do nothing 3860 break; 3861 case HCI_POWER_SLEEP: 3862 // do nothing (with SLEEP == OFF) 3863 break; 3864 default: 3865 btstack_assert(false); 3866 break; 3867 } 3868 return ERROR_CODE_SUCCESS; 3869 } 3870 3871 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3872 switch (power_mode){ 3873 case HCI_POWER_ON: 3874 // do nothing 3875 break; 3876 case HCI_POWER_OFF: 3877 // no connections yet, just turn it off 3878 hci_power_control_off(); 3879 break; 3880 case HCI_POWER_SLEEP: 3881 // no connections yet, just turn it off 3882 hci_power_control_sleep(); 3883 break; 3884 default: 3885 btstack_assert(false); 3886 break; 3887 } 3888 return ERROR_CODE_SUCCESS; 3889 } 3890 3891 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3892 switch (power_mode){ 3893 case HCI_POWER_ON: 3894 // do nothing 3895 break; 3896 case HCI_POWER_OFF: 3897 // see hci_run 3898 hci_stack->state = HCI_STATE_HALTING; 3899 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3900 break; 3901 case HCI_POWER_SLEEP: 3902 // see hci_run 3903 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3904 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3905 break; 3906 default: 3907 btstack_assert(false); 3908 break; 3909 } 3910 return ERROR_CODE_SUCCESS; 3911 } 3912 3913 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3914 switch (power_mode){ 3915 case HCI_POWER_ON: 3916 hci_power_transition_to_initializing(); 3917 break; 3918 case HCI_POWER_OFF: 3919 // do nothing 3920 break; 3921 case HCI_POWER_SLEEP: 3922 // see hci_run 3923 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3924 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3925 break; 3926 default: 3927 btstack_assert(false); 3928 break; 3929 } 3930 return ERROR_CODE_SUCCESS; 3931 } 3932 3933 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3934 switch (power_mode){ 3935 case HCI_POWER_ON: 3936 3937 #ifdef HAVE_PLATFORM_IPHONE_OS 3938 // nothing to do, if H4 supports power management 3939 if (btstack_control_iphone_power_management_enabled()){ 3940 hci_stack->state = HCI_STATE_INITIALIZING; 3941 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3942 break; 3943 } 3944 #endif 3945 hci_power_transition_to_initializing(); 3946 break; 3947 case HCI_POWER_OFF: 3948 // see hci_run 3949 hci_stack->state = HCI_STATE_HALTING; 3950 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3951 break; 3952 case HCI_POWER_SLEEP: 3953 // do nothing 3954 break; 3955 default: 3956 btstack_assert(false); 3957 break; 3958 } 3959 return ERROR_CODE_SUCCESS; 3960 } 3961 3962 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3963 int err; 3964 switch (power_mode){ 3965 case HCI_POWER_ON: 3966 #ifdef HAVE_PLATFORM_IPHONE_OS 3967 // nothing to do, if H4 supports power management 3968 if (btstack_control_iphone_power_management_enabled()){ 3969 hci_stack->state = HCI_STATE_INITIALIZING; 3970 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3971 hci_update_scan_enable(); 3972 break; 3973 } 3974 #endif 3975 err = hci_power_control_wake(); 3976 if (err) return err; 3977 hci_power_transition_to_initializing(); 3978 break; 3979 case HCI_POWER_OFF: 3980 hci_stack->state = HCI_STATE_HALTING; 3981 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3982 break; 3983 case HCI_POWER_SLEEP: 3984 // do nothing 3985 break; 3986 default: 3987 btstack_assert(false); 3988 break; 3989 } 3990 return ERROR_CODE_SUCCESS; 3991 } 3992 3993 int hci_power_control(HCI_POWER_MODE power_mode){ 3994 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3995 int err = 0; 3996 switch (hci_stack->state){ 3997 case HCI_STATE_OFF: 3998 err = hci_power_control_state_off(power_mode); 3999 break; 4000 case HCI_STATE_INITIALIZING: 4001 err = hci_power_control_state_initializing(power_mode); 4002 break; 4003 case HCI_STATE_WORKING: 4004 err = hci_power_control_state_working(power_mode); 4005 break; 4006 case HCI_STATE_HALTING: 4007 err = hci_power_control_state_halting(power_mode); 4008 break; 4009 case HCI_STATE_FALLING_ASLEEP: 4010 err = hci_power_control_state_falling_asleep(power_mode); 4011 break; 4012 case HCI_STATE_SLEEPING: 4013 err = hci_power_control_state_sleeping(power_mode); 4014 break; 4015 default: 4016 btstack_assert(false); 4017 break; 4018 } 4019 if (err != 0){ 4020 return err; 4021 } 4022 4023 // create internal event 4024 hci_emit_state(); 4025 4026 // trigger next/first action 4027 hci_run(); 4028 4029 return 0; 4030 } 4031 4032 4033 #ifdef ENABLE_CLASSIC 4034 4035 static void hci_update_scan_enable(void){ 4036 // 2 = page scan, 1 = inq scan 4037 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4038 hci_run(); 4039 } 4040 4041 void gap_discoverable_control(uint8_t enable){ 4042 if (enable) enable = 1; // normalize argument 4043 4044 if (hci_stack->discoverable == enable){ 4045 hci_emit_discoverable_enabled(hci_stack->discoverable); 4046 return; 4047 } 4048 4049 hci_stack->discoverable = enable; 4050 hci_update_scan_enable(); 4051 } 4052 4053 void gap_connectable_control(uint8_t enable){ 4054 if (enable) enable = 1; // normalize argument 4055 4056 // don't emit event 4057 if (hci_stack->connectable == enable) return; 4058 4059 hci_stack->connectable = enable; 4060 hci_update_scan_enable(); 4061 } 4062 #endif 4063 4064 void gap_local_bd_addr(bd_addr_t address_buffer){ 4065 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4066 } 4067 4068 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4069 static void hci_host_num_completed_packets(void){ 4070 4071 // create packet manually as arrays are not supported and num_commands should not get reduced 4072 hci_reserve_packet_buffer(); 4073 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4074 4075 uint16_t size = 0; 4076 uint16_t num_handles = 0; 4077 packet[size++] = 0x35; 4078 packet[size++] = 0x0c; 4079 size++; // skip param len 4080 size++; // skip num handles 4081 4082 // add { handle, packets } entries 4083 btstack_linked_item_t * it; 4084 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4085 hci_connection_t * connection = (hci_connection_t *) it; 4086 if (connection->num_packets_completed){ 4087 little_endian_store_16(packet, size, connection->con_handle); 4088 size += 2; 4089 little_endian_store_16(packet, size, connection->num_packets_completed); 4090 size += 2; 4091 // 4092 num_handles++; 4093 connection->num_packets_completed = 0; 4094 } 4095 } 4096 4097 packet[2] = size - 3; 4098 packet[3] = num_handles; 4099 4100 hci_stack->host_completed_packets = 0; 4101 4102 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4103 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4104 4105 // release packet buffer for synchronous transport implementations 4106 if (hci_transport_synchronous()){ 4107 hci_release_packet_buffer(); 4108 hci_emit_transport_packet_sent(); 4109 } 4110 } 4111 #endif 4112 4113 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4114 UNUSED(ds); 4115 hci_stack->substate = HCI_HALTING_CLOSE; 4116 // allow packet handlers to defer final shutdown 4117 hci_emit_state(); 4118 hci_run(); 4119 } 4120 4121 static bool hci_run_acl_fragments(void){ 4122 if (hci_stack->acl_fragmentation_total_size > 0u) { 4123 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4124 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4125 if (connection) { 4126 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4127 hci_send_acl_packet_fragments(connection); 4128 return true; 4129 } 4130 } else { 4131 // connection gone -> discard further fragments 4132 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4133 hci_stack->acl_fragmentation_total_size = 0; 4134 hci_stack->acl_fragmentation_pos = 0; 4135 } 4136 } 4137 return false; 4138 } 4139 4140 #ifdef ENABLE_CLASSIC 4141 static bool hci_run_general_gap_classic(void){ 4142 4143 // assert stack is working and classic is active 4144 if (hci_classic_supported() == false) return false; 4145 if (hci_stack->state != HCI_STATE_WORKING) return false; 4146 4147 // decline incoming connections 4148 if (hci_stack->decline_reason){ 4149 uint8_t reason = hci_stack->decline_reason; 4150 hci_stack->decline_reason = 0; 4151 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4152 return true; 4153 } 4154 4155 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4156 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4157 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4158 return true; 4159 } 4160 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4161 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4162 gap_run_set_local_name(); 4163 return true; 4164 } 4165 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4166 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4167 gap_run_set_eir_data(); 4168 return true; 4169 } 4170 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4171 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4172 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4173 return true; 4174 } 4175 // write page scan activity 4176 if (hci_stack->new_page_scan_interval != 0xffff) { 4177 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4178 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4179 hci_stack->new_page_scan_interval = 0xffff; 4180 hci_stack->new_page_scan_window = 0xffff; 4181 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4182 return true; 4183 } 4184 // write page scan type 4185 if (hci_stack->new_page_scan_type != 0xff) { 4186 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4187 hci_stack->new_page_scan_type = 0xff; 4188 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4189 return true; 4190 } 4191 // send scan enable 4192 if (hci_stack->new_scan_enable_value != 0xff) { 4193 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4194 hci_stack->new_scan_enable_value = 0xff; 4195 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4196 return true; 4197 } 4198 4199 // start/stop inquiry 4200 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4201 uint8_t duration = hci_stack->inquiry_state; 4202 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4203 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4204 return true; 4205 } 4206 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4207 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4208 hci_send_cmd(&hci_inquiry_cancel); 4209 return true; 4210 } 4211 // remote name request 4212 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4213 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4214 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4215 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4216 return true; 4217 } 4218 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4219 // Local OOB data 4220 if (hci_stack->classic_read_local_oob_data){ 4221 hci_stack->classic_read_local_oob_data = false; 4222 if (hci_stack->local_supported_commands[1] & 0x10u){ 4223 hci_send_cmd(&hci_read_local_extended_oob_data); 4224 } else { 4225 hci_send_cmd(&hci_read_local_oob_data); 4226 } 4227 } 4228 #endif 4229 // pairing 4230 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4231 uint8_t state = hci_stack->gap_pairing_state; 4232 uint8_t pin_code[16]; 4233 switch (state){ 4234 case GAP_PAIRING_STATE_SEND_PIN: 4235 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4236 memset(pin_code, 0, 16); 4237 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4238 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4239 break; 4240 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4241 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4242 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4243 break; 4244 case GAP_PAIRING_STATE_SEND_PASSKEY: 4245 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4246 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4247 break; 4248 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4249 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4250 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4251 break; 4252 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4253 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4254 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4255 break; 4256 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4257 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4258 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4259 break; 4260 default: 4261 break; 4262 } 4263 return true; 4264 } 4265 return false; 4266 } 4267 #endif 4268 4269 #ifdef ENABLE_BLE 4270 static bool hci_run_general_gap_le(void){ 4271 4272 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4273 4274 if (hci_stack->state != HCI_STATE_WORKING) return false; 4275 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4276 4277 4278 // Phase 1: collect what to stop 4279 4280 bool scanning_stop = false; 4281 bool connecting_stop = false; 4282 bool advertising_stop = false; 4283 4284 #ifndef ENABLE_LE_CENTRAL 4285 UNUSED(scanning_stop); 4286 UNUSED(connecting_stop); 4287 #endif 4288 #ifndef ENABLE_LE_PERIPHERAL 4289 UNUSED(advertising_stop); 4290 #endif 4291 4292 // check if whitelist needs modification 4293 bool whitelist_modification_pending = false; 4294 btstack_linked_list_iterator_t lit; 4295 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4296 while (btstack_linked_list_iterator_has_next(&lit)){ 4297 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4298 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4299 whitelist_modification_pending = true; 4300 break; 4301 } 4302 } 4303 // check if resolving list needs modification 4304 bool resolving_list_modification_pending = false; 4305 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4306 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4307 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4308 resolving_list_modification_pending = true; 4309 } 4310 #endif 4311 4312 #ifdef ENABLE_LE_CENTRAL 4313 // scanning control 4314 if (hci_stack->le_scanning_active) { 4315 // stop if: 4316 // - parameter change required 4317 // - it's disabled 4318 // - whitelist change required but used for scanning 4319 // - resolving list modified 4320 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4321 if ((hci_stack->le_scanning_param_update) || 4322 !hci_stack->le_scanning_enabled || 4323 scanning_uses_whitelist || 4324 resolving_list_modification_pending){ 4325 4326 scanning_stop = true; 4327 } 4328 } 4329 #endif 4330 4331 #ifdef ENABLE_LE_CENTRAL 4332 // connecting control 4333 bool connecting_with_whitelist; 4334 switch (hci_stack->le_connecting_state){ 4335 case LE_CONNECTING_DIRECT: 4336 case LE_CONNECTING_WHITELIST: 4337 // stop connecting if: 4338 // - connecting uses white and whitelist modification pending 4339 // - if it got disabled 4340 // - resolving list modified 4341 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4342 if ((connecting_with_whitelist && whitelist_modification_pending) || 4343 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4344 resolving_list_modification_pending) { 4345 4346 connecting_stop = true; 4347 } 4348 break; 4349 default: 4350 break; 4351 } 4352 #endif 4353 4354 #ifdef ENABLE_LE_PERIPHERAL 4355 // le advertisement control 4356 if (hci_stack->le_advertisements_active){ 4357 // stop if: 4358 // - parameter change required 4359 // - it's disabled 4360 // - whitelist change required but used for advertisement filter policy 4361 // - resolving list modified 4362 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4363 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4364 if (advertising_change || 4365 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4366 (advertising_uses_whitelist & whitelist_modification_pending) || 4367 resolving_list_modification_pending) { 4368 4369 advertising_stop = true; 4370 } 4371 } 4372 #endif 4373 4374 4375 // Phase 2: stop everything that should be off during modifications 4376 4377 #ifdef ENABLE_LE_CENTRAL 4378 if (scanning_stop){ 4379 hci_stack->le_scanning_active = false; 4380 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4381 return true; 4382 } 4383 #endif 4384 4385 #ifdef ENABLE_LE_CENTRAL 4386 if (connecting_stop){ 4387 hci_send_cmd(&hci_le_create_connection_cancel); 4388 return true; 4389 } 4390 #endif 4391 4392 #ifdef ENABLE_LE_PERIPHERAL 4393 if (advertising_stop){ 4394 hci_stack->le_advertisements_active = false; 4395 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4396 return true; 4397 } 4398 #endif 4399 4400 // Phase 3: modify 4401 4402 #ifdef ENABLE_LE_CENTRAL 4403 if (hci_stack->le_scanning_param_update){ 4404 hci_stack->le_scanning_param_update = false; 4405 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4406 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4407 return true; 4408 } 4409 #endif 4410 4411 #ifdef ENABLE_LE_PERIPHERAL 4412 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4413 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4414 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4415 hci_send_cmd(&hci_le_set_advertising_parameters, 4416 hci_stack->le_advertisements_interval_min, 4417 hci_stack->le_advertisements_interval_max, 4418 hci_stack->le_advertisements_type, 4419 hci_stack->le_advertisements_own_addr_type, 4420 hci_stack->le_advertisements_direct_address_type, 4421 hci_stack->le_advertisements_direct_address, 4422 hci_stack->le_advertisements_channel_map, 4423 hci_stack->le_advertisements_filter_policy); 4424 return true; 4425 } 4426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4428 uint8_t adv_data_clean[31]; 4429 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4430 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4431 hci_stack->le_advertisements_data_len); 4432 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4433 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4434 return true; 4435 } 4436 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4437 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4438 uint8_t scan_data_clean[31]; 4439 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4440 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4441 hci_stack->le_scan_response_data_len); 4442 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4443 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4444 return true; 4445 } 4446 #endif 4447 4448 4449 #ifdef ENABLE_LE_CENTRAL 4450 // if connect with whitelist was active and is not cancelled yet, wait until next time 4451 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4452 #endif 4453 4454 // LE Whitelist Management 4455 if (whitelist_modification_pending){ 4456 // add/remove entries 4457 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4458 while (btstack_linked_list_iterator_has_next(&lit)){ 4459 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4460 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4461 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4462 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4463 return true; 4464 } 4465 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4466 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4467 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4468 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4469 return true; 4470 } 4471 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4472 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4473 btstack_memory_whitelist_entry_free(entry); 4474 } 4475 } 4476 } 4477 4478 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4479 // LE Resolving List Management 4480 if (resolving_list_supported) { 4481 uint16_t i; 4482 switch (hci_stack->le_resolving_list_state) { 4483 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4484 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4485 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4486 return true; 4487 case LE_RESOLVING_LIST_READ_SIZE: 4488 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4489 hci_send_cmd(&hci_le_read_resolving_list_size); 4490 return true; 4491 case LE_RESOLVING_LIST_SEND_CLEAR: 4492 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4493 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4494 sizeof(hci_stack->le_resolving_list_add_entries)); 4495 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4496 sizeof(hci_stack->le_resolving_list_remove_entries)); 4497 hci_send_cmd(&hci_le_clear_resolving_list); 4498 return true; 4499 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4500 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4501 uint8_t offset = i >> 3; 4502 uint8_t mask = 1 << (i & 7); 4503 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4504 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4505 bd_addr_t peer_identity_addreses; 4506 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4507 sm_key_t peer_irk; 4508 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4509 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4510 4511 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4512 // trigger whitelist entry 'update' (work around for controller bug) 4513 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4514 while (btstack_linked_list_iterator_has_next(&lit)) { 4515 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4516 if (entry->address_type != peer_identity_addr_type) continue; 4517 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4518 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4519 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4520 } 4521 #endif 4522 4523 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4524 peer_identity_addreses); 4525 return true; 4526 } 4527 4528 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4529 4530 /* fall through */ 4531 4532 case LE_RESOLVING_LIST_ADD_ENTRIES: 4533 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4534 uint8_t offset = i >> 3; 4535 uint8_t mask = 1 << (i & 7); 4536 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4537 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4538 bd_addr_t peer_identity_addreses; 4539 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4540 sm_key_t peer_irk; 4541 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4542 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4543 const uint8_t *local_irk = gap_get_persistent_irk(); 4544 // command uses format specifier 'P' that stores 16-byte value without flip 4545 uint8_t local_irk_flipped[16]; 4546 uint8_t peer_irk_flipped[16]; 4547 reverse_128(local_irk, local_irk_flipped); 4548 reverse_128(peer_irk, peer_irk_flipped); 4549 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4550 peer_irk_flipped, local_irk_flipped); 4551 return true; 4552 } 4553 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4554 break; 4555 4556 default: 4557 break; 4558 } 4559 } 4560 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4561 #endif 4562 4563 // Phase 4: restore state 4564 4565 #ifdef ENABLE_LE_CENTRAL 4566 // re-start scanning 4567 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4568 hci_stack->le_scanning_active = true; 4569 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4570 return true; 4571 } 4572 #endif 4573 4574 #ifdef ENABLE_LE_CENTRAL 4575 // re-start connecting 4576 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4577 bd_addr_t null_addr; 4578 memset(null_addr, 0, 6); 4579 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4580 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4581 hci_send_cmd(&hci_le_create_connection, 4582 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4583 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4584 1, // use whitelist 4585 0, // peer address type 4586 null_addr, // peer bd addr 4587 hci_stack->le_connection_own_addr_type, // our addr type: 4588 hci_stack->le_connection_interval_min, // conn interval min 4589 hci_stack->le_connection_interval_max, // conn interval max 4590 hci_stack->le_connection_latency, // conn latency 4591 hci_stack->le_supervision_timeout, // conn latency 4592 hci_stack->le_minimum_ce_length, // min ce length 4593 hci_stack->le_maximum_ce_length // max ce length 4594 ); 4595 return true; 4596 } 4597 #endif 4598 4599 #ifdef ENABLE_LE_PERIPHERAL 4600 // re-start advertising 4601 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4602 // check if advertisements should be enabled given 4603 hci_stack->le_advertisements_active = true; 4604 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4605 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4606 return true; 4607 } 4608 #endif 4609 4610 return false; 4611 } 4612 #endif 4613 4614 static bool hci_run_general_pending_commands(void){ 4615 btstack_linked_item_t * it; 4616 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4617 hci_connection_t * connection = (hci_connection_t *) it; 4618 4619 switch(connection->state){ 4620 case SEND_CREATE_CONNECTION: 4621 switch(connection->address_type){ 4622 #ifdef ENABLE_CLASSIC 4623 case BD_ADDR_TYPE_ACL: 4624 log_info("sending hci_create_connection"); 4625 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4626 break; 4627 #endif 4628 default: 4629 #ifdef ENABLE_BLE 4630 #ifdef ENABLE_LE_CENTRAL 4631 log_info("sending hci_le_create_connection"); 4632 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4633 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4634 hci_send_cmd(&hci_le_create_connection, 4635 hci_stack->le_connection_scan_interval, // conn scan interval 4636 hci_stack->le_connection_scan_window, // conn scan windows 4637 0, // don't use whitelist 4638 connection->address_type, // peer address type 4639 connection->address, // peer bd addr 4640 hci_stack->le_connection_own_addr_type, // our addr type: 4641 hci_stack->le_connection_interval_min, // conn interval min 4642 hci_stack->le_connection_interval_max, // conn interval max 4643 hci_stack->le_connection_latency, // conn latency 4644 hci_stack->le_supervision_timeout, // conn latency 4645 hci_stack->le_minimum_ce_length, // min ce length 4646 hci_stack->le_maximum_ce_length // max ce length 4647 ); 4648 connection->state = SENT_CREATE_CONNECTION; 4649 #endif 4650 #endif 4651 break; 4652 } 4653 return true; 4654 4655 #ifdef ENABLE_CLASSIC 4656 case RECEIVED_CONNECTION_REQUEST: 4657 connection->role = HCI_ROLE_SLAVE; 4658 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4659 log_info("sending hci_accept_connection_request"); 4660 connection->state = ACCEPTED_CONNECTION_REQUEST; 4661 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4662 } 4663 return true; 4664 #endif 4665 4666 #ifdef ENABLE_BLE 4667 #ifdef ENABLE_LE_CENTRAL 4668 case SEND_CANCEL_CONNECTION: 4669 connection->state = SENT_CANCEL_CONNECTION; 4670 hci_send_cmd(&hci_le_create_connection_cancel); 4671 return true; 4672 #endif 4673 #endif 4674 case SEND_DISCONNECT: 4675 connection->state = SENT_DISCONNECT; 4676 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4677 return true; 4678 4679 default: 4680 break; 4681 } 4682 4683 // no further commands if connection is about to get shut down 4684 if (connection->state == SENT_DISCONNECT) continue; 4685 4686 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4687 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4688 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4689 return true; 4690 } 4691 4692 #ifdef ENABLE_CLASSIC 4693 4694 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4695 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4696 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4697 return true; 4698 } 4699 4700 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4701 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4702 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4703 return true; 4704 } 4705 4706 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4707 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4708 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4709 return true; 4710 } 4711 4712 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4713 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4714 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4715 return true; 4716 } 4717 4718 // Handling link key request requires remote supported features 4719 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4720 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4721 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4722 4723 // lookup link key using cached key first 4724 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4725 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4726 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4727 } 4728 4729 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4730 if (have_link_key && security_level_sufficient){ 4731 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4732 } else { 4733 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4734 } 4735 return true; 4736 } 4737 4738 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4739 log_info("denying to pin request"); 4740 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4741 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4742 return true; 4743 } 4744 4745 // security assessment requires remote features 4746 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4747 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4748 hci_ssp_assess_security_on_io_cap_request(connection); 4749 // 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 4750 } 4751 4752 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4753 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4754 // set authentication requirements: 4755 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4756 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4757 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4758 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4759 authreq |= 1; 4760 } 4761 bool bonding = hci_stack->bondable; 4762 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4763 // if we have received IO Cap Response, we're in responder role 4764 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4765 if (bonding && !remote_bonding){ 4766 log_info("Remote not bonding, dropping local flag"); 4767 bonding = false; 4768 } 4769 } 4770 if (bonding){ 4771 if (connection->bonding_flags & BONDING_DEDICATED){ 4772 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4773 } else { 4774 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4775 } 4776 } 4777 uint8_t have_oob_data = 0; 4778 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4779 if (connection->classic_oob_c_192 != NULL){ 4780 have_oob_data |= 1; 4781 } 4782 if (connection->classic_oob_c_256 != NULL){ 4783 have_oob_data |= 2; 4784 } 4785 #endif 4786 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4787 return true; 4788 } 4789 4790 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4791 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4792 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4793 return true; 4794 } 4795 4796 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4797 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4798 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4799 const uint8_t zero[16] = { 0 }; 4800 const uint8_t * r_192 = zero; 4801 const uint8_t * c_192 = zero; 4802 const uint8_t * r_256 = zero; 4803 const uint8_t * c_256 = zero; 4804 // verify P-256 OOB 4805 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4806 c_256 = connection->classic_oob_c_256; 4807 if (connection->classic_oob_r_256 != NULL) { 4808 r_256 = connection->classic_oob_r_256; 4809 } 4810 } 4811 // verify P-192 OOB 4812 if ((connection->classic_oob_c_192 != NULL)) { 4813 c_192 = connection->classic_oob_c_192; 4814 if (connection->classic_oob_r_192 != NULL) { 4815 r_192 = connection->classic_oob_r_192; 4816 } 4817 } 4818 4819 // assess security 4820 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4821 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4822 if (need_level_4 && !can_reach_level_4){ 4823 log_info("Level 4 required, but not possible -> abort"); 4824 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4825 // send oob negative reply 4826 c_256 = NULL; 4827 c_192 = NULL; 4828 } 4829 4830 // Reply 4831 if (c_256 != zero) { 4832 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4833 } else if (c_192 != zero){ 4834 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4835 } else { 4836 hci_stack->classic_oob_con_handle = connection->con_handle; 4837 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4838 } 4839 return true; 4840 } 4841 #endif 4842 4843 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4844 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4845 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4846 return true; 4847 } 4848 4849 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4850 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4851 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4852 return true; 4853 } 4854 4855 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4856 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4857 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4858 return true; 4859 } 4860 4861 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4862 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4863 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4864 connection->state = SENT_DISCONNECT; 4865 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4866 return true; 4867 } 4868 4869 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4870 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4871 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4872 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4873 return true; 4874 } 4875 4876 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4877 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4878 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4879 return true; 4880 } 4881 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4882 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4883 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4884 return true; 4885 } 4886 #endif 4887 4888 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4889 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4890 #ifdef ENABLE_CLASSIC 4891 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4892 #endif 4893 if (connection->state != SENT_DISCONNECT){ 4894 connection->state = SENT_DISCONNECT; 4895 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4896 return true; 4897 } 4898 } 4899 4900 #ifdef ENABLE_CLASSIC 4901 uint16_t sniff_min_interval; 4902 switch (connection->sniff_min_interval){ 4903 case 0: 4904 break; 4905 case 0xffff: 4906 connection->sniff_min_interval = 0; 4907 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4908 return true; 4909 default: 4910 sniff_min_interval = connection->sniff_min_interval; 4911 connection->sniff_min_interval = 0; 4912 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4913 return true; 4914 } 4915 4916 if (connection->sniff_subrating_max_latency != 0xffff){ 4917 uint16_t max_latency = connection->sniff_subrating_max_latency; 4918 connection->sniff_subrating_max_latency = 0; 4919 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4920 return true; 4921 } 4922 4923 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4924 uint8_t service_type = (uint8_t) connection->qos_service_type; 4925 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4926 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); 4927 return true; 4928 } 4929 4930 if (connection->request_role != HCI_ROLE_INVALID){ 4931 hci_role_t role = connection->request_role; 4932 connection->request_role = HCI_ROLE_INVALID; 4933 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4934 return true; 4935 } 4936 #endif 4937 4938 #ifdef ENABLE_BLE 4939 switch (connection->le_con_parameter_update_state){ 4940 // response to L2CAP CON PARAMETER UPDATE REQUEST 4941 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4942 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4943 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4944 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4945 0x0000, 0xffff); 4946 return true; 4947 case CON_PARAMETER_UPDATE_REPLY: 4948 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4949 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4950 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4951 0x0000, 0xffff); 4952 return true; 4953 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4954 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4955 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4956 return true; 4957 default: 4958 break; 4959 } 4960 if (connection->le_phy_update_all_phys != 0xffu){ 4961 uint8_t all_phys = connection->le_phy_update_all_phys; 4962 connection->le_phy_update_all_phys = 0xff; 4963 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); 4964 return true; 4965 } 4966 #endif 4967 } 4968 return false; 4969 } 4970 4971 static void hci_run(void){ 4972 4973 bool done; 4974 4975 // send continuation fragments first, as they block the prepared packet buffer 4976 done = hci_run_acl_fragments(); 4977 if (done) return; 4978 4979 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4980 // send host num completed packets next as they don't require num_cmd_packets > 0 4981 if (!hci_can_send_comand_packet_transport()) return; 4982 if (hci_stack->host_completed_packets){ 4983 hci_host_num_completed_packets(); 4984 return; 4985 } 4986 #endif 4987 4988 if (!hci_can_send_command_packet_now()) return; 4989 4990 // global/non-connection oriented commands 4991 4992 4993 #ifdef ENABLE_CLASSIC 4994 // general gap classic 4995 done = hci_run_general_gap_classic(); 4996 if (done) return; 4997 #endif 4998 4999 #ifdef ENABLE_BLE 5000 // general gap le 5001 done = hci_run_general_gap_le(); 5002 if (done) return; 5003 #endif 5004 5005 // send pending HCI commands 5006 done = hci_run_general_pending_commands(); 5007 if (done) return; 5008 5009 // stack state sub statemachines 5010 hci_connection_t * connection; 5011 switch (hci_stack->state){ 5012 case HCI_STATE_INITIALIZING: 5013 hci_initializing_run(); 5014 break; 5015 5016 case HCI_STATE_HALTING: 5017 5018 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5019 switch (hci_stack->substate){ 5020 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5021 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5022 5023 #ifdef ENABLE_BLE 5024 #ifdef ENABLE_LE_CENTRAL 5025 // free whitelist entries 5026 { 5027 btstack_linked_list_iterator_t lit; 5028 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5029 while (btstack_linked_list_iterator_has_next(&lit)){ 5030 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5031 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5032 btstack_memory_whitelist_entry_free(entry); 5033 } 5034 } 5035 #endif 5036 #endif 5037 // close all open connections 5038 connection = (hci_connection_t *) hci_stack->connections; 5039 if (connection){ 5040 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5041 if (!hci_can_send_command_packet_now()) return; 5042 5043 // check state 5044 if (connection->state == SENT_DISCONNECT) return; 5045 connection->state = SENT_DISCONNECT; 5046 5047 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5048 5049 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5050 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5051 5052 // ... which would be ignored anyway as we shutdown (free) the connection now 5053 hci_shutdown_connection(connection); 5054 5055 // finally, send the disconnect command 5056 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5057 return; 5058 } 5059 5060 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5061 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5062 log_info("HCI_STATE_HALTING: wait 50 ms"); 5063 hci_stack->substate = HCI_HALTING_W4_TIMER; 5064 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5065 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5066 btstack_run_loop_add_timer(&hci_stack->timeout); 5067 break; 5068 } 5069 5070 /* fall through */ 5071 5072 case HCI_HALTING_CLOSE: 5073 log_info("HCI_STATE_HALTING, calling off"); 5074 5075 // switch mode 5076 hci_power_control_off(); 5077 5078 log_info("HCI_STATE_HALTING, emitting state"); 5079 hci_emit_state(); 5080 log_info("HCI_STATE_HALTING, done"); 5081 break; 5082 5083 case HCI_HALTING_W4_TIMER: 5084 // keep waiting 5085 5086 break; 5087 default: 5088 break; 5089 } 5090 5091 break; 5092 5093 case HCI_STATE_FALLING_ASLEEP: 5094 switch(hci_stack->substate) { 5095 case HCI_FALLING_ASLEEP_DISCONNECT: 5096 log_info("HCI_STATE_FALLING_ASLEEP"); 5097 // close all open connections 5098 connection = (hci_connection_t *) hci_stack->connections; 5099 5100 #ifdef HAVE_PLATFORM_IPHONE_OS 5101 // don't close connections, if H4 supports power management 5102 if (btstack_control_iphone_power_management_enabled()){ 5103 connection = NULL; 5104 } 5105 #endif 5106 if (connection){ 5107 5108 // send disconnect 5109 if (!hci_can_send_command_packet_now()) return; 5110 5111 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5112 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5113 5114 // send disconnected event right away - causes higher layer connections to get closed, too. 5115 hci_shutdown_connection(connection); 5116 return; 5117 } 5118 5119 if (hci_classic_supported()){ 5120 // disable page and inquiry scan 5121 if (!hci_can_send_command_packet_now()) return; 5122 5123 log_info("HCI_STATE_HALTING, disabling inq scans"); 5124 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5125 5126 // continue in next sub state 5127 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5128 break; 5129 } 5130 5131 /* fall through */ 5132 5133 case HCI_FALLING_ASLEEP_COMPLETE: 5134 log_info("HCI_STATE_HALTING, calling sleep"); 5135 #ifdef HAVE_PLATFORM_IPHONE_OS 5136 // don't actually go to sleep, if H4 supports power management 5137 if (btstack_control_iphone_power_management_enabled()){ 5138 // SLEEP MODE reached 5139 hci_stack->state = HCI_STATE_SLEEPING; 5140 hci_emit_state(); 5141 break; 5142 } 5143 #endif 5144 // switch mode 5145 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5146 hci_emit_state(); 5147 break; 5148 5149 default: 5150 break; 5151 } 5152 break; 5153 5154 default: 5155 break; 5156 } 5157 } 5158 5159 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5160 // house-keeping 5161 5162 #ifdef ENABLE_CLASSIC 5163 bd_addr_t addr; 5164 hci_connection_t * conn; 5165 #endif 5166 #ifdef ENABLE_LE_CENTRAL 5167 uint8_t initiator_filter_policy; 5168 #endif 5169 5170 uint16_t opcode = little_endian_read_16(packet, 0); 5171 switch (opcode) { 5172 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5173 hci_stack->loopback_mode = packet[3]; 5174 break; 5175 5176 #ifdef ENABLE_CLASSIC 5177 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5178 reverse_bd_addr(&packet[3], addr); 5179 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5180 5181 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5182 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5183 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5184 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5185 } 5186 5187 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5188 if (!conn) { 5189 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5190 if (!conn) { 5191 // notify client that alloc failed 5192 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5193 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5194 } 5195 conn->state = SEND_CREATE_CONNECTION; 5196 conn->role = HCI_ROLE_MASTER; 5197 } 5198 5199 conn->con_handle = HCI_CON_HANDLE_INVALID; 5200 conn->role = HCI_ROLE_INVALID; 5201 5202 log_info("conn state %u", conn->state); 5203 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5204 switch (conn->state) { 5205 // if connection active exists 5206 case OPEN: 5207 // and OPEN, emit connection complete command 5208 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5209 // packet not sent to controller 5210 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5211 case RECEIVED_DISCONNECTION_COMPLETE: 5212 // create connection triggered in disconnect complete event, let's do it now 5213 break; 5214 case SEND_CREATE_CONNECTION: 5215 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5216 break; 5217 default: 5218 // otherwise, just ignore as it is already in the open process 5219 // packet not sent to controller 5220 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5221 } 5222 conn->state = SENT_CREATE_CONNECTION; 5223 5224 // track outgoing connection 5225 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5226 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5227 break; 5228 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5229 if (hci_stack->link_key_db) { 5230 reverse_bd_addr(&packet[3], addr); 5231 hci_stack->link_key_db->delete_link_key(addr); 5232 } 5233 break; 5234 5235 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5236 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5237 // setup_synchronous_connection? Voice setting at offset 22 5238 // TODO: compare to current setting if sco connection already active 5239 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5240 break; 5241 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5242 // accept_synchronus_connection? Voice setting at offset 18 5243 // TODO: compare to current setting if sco connection already active 5244 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5245 break; 5246 #endif 5247 #endif 5248 5249 #ifdef ENABLE_BLE 5250 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5251 hci_stack->le_random_address_set = 1; 5252 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5253 break; 5254 #ifdef ENABLE_LE_PERIPHERAL 5255 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5256 hci_stack->le_advertisements_active = packet[3] != 0; 5257 break; 5258 #endif 5259 #ifdef ENABLE_LE_CENTRAL 5260 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5261 // white list used? 5262 initiator_filter_policy = packet[7]; 5263 switch (initiator_filter_policy) { 5264 case 0: 5265 // whitelist not used 5266 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5267 break; 5268 case 1: 5269 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5270 break; 5271 default: 5272 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5273 break; 5274 } 5275 // track outgoing connection 5276 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5277 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5278 break; 5279 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5280 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5281 break; 5282 #endif 5283 #endif 5284 default: 5285 break; 5286 } 5287 5288 hci_stack->num_cmd_packets--; 5289 5290 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5291 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5292 if (err != 0){ 5293 return ERROR_CODE_HARDWARE_FAILURE; 5294 } 5295 return ERROR_CODE_SUCCESS; 5296 } 5297 5298 // disconnect because of security block 5299 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5300 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5301 if (!connection) return; 5302 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5303 } 5304 5305 5306 // Configure Secure Simple Pairing 5307 5308 #ifdef ENABLE_CLASSIC 5309 5310 // enable will enable SSP during init 5311 void gap_ssp_set_enable(int enable){ 5312 hci_stack->ssp_enable = enable; 5313 } 5314 5315 static int hci_local_ssp_activated(void){ 5316 return gap_ssp_supported() && hci_stack->ssp_enable; 5317 } 5318 5319 // if set, BTstack will respond to io capability request using authentication requirement 5320 void gap_ssp_set_io_capability(int io_capability){ 5321 hci_stack->ssp_io_capability = io_capability; 5322 } 5323 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5324 hci_stack->ssp_authentication_requirement = authentication_requirement; 5325 } 5326 5327 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5328 void gap_ssp_set_auto_accept(int auto_accept){ 5329 hci_stack->ssp_auto_accept = auto_accept; 5330 } 5331 5332 void gap_secure_connections_enable(bool enable){ 5333 hci_stack->secure_connections_enable = enable; 5334 } 5335 5336 #endif 5337 5338 // va_list part of hci_send_cmd 5339 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5340 if (!hci_can_send_command_packet_now()){ 5341 log_error("hci_send_cmd called but cannot send packet now"); 5342 return ERROR_CODE_COMMAND_DISALLOWED; 5343 } 5344 5345 // for HCI INITIALIZATION 5346 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5347 hci_stack->last_cmd_opcode = cmd->opcode; 5348 5349 hci_reserve_packet_buffer(); 5350 uint8_t * packet = hci_stack->hci_packet_buffer; 5351 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5352 uint8_t status = hci_send_cmd_packet(packet, size); 5353 5354 // release packet buffer on error or for synchronous transport implementations 5355 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5356 hci_release_packet_buffer(); 5357 hci_emit_transport_packet_sent(); 5358 } 5359 5360 return status; 5361 } 5362 5363 /** 5364 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5365 */ 5366 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5367 va_list argptr; 5368 va_start(argptr, cmd); 5369 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5370 va_end(argptr); 5371 return status; 5372 } 5373 5374 // Create various non-HCI events. 5375 // TODO: generalize, use table similar to hci_create_command 5376 5377 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5378 // dump packet 5379 if (dump) { 5380 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5381 } 5382 5383 // dispatch to all event handlers 5384 btstack_linked_list_iterator_t it; 5385 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5386 while (btstack_linked_list_iterator_has_next(&it)){ 5387 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5388 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5389 } 5390 } 5391 5392 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5393 if (!hci_stack->acl_packet_handler) return; 5394 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5395 } 5396 5397 #ifdef ENABLE_CLASSIC 5398 static void hci_notify_if_sco_can_send_now(void){ 5399 // notify SCO sender if waiting 5400 if (!hci_stack->sco_waiting_for_can_send_now) return; 5401 if (hci_can_send_sco_packet_now()){ 5402 hci_stack->sco_waiting_for_can_send_now = 0; 5403 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5404 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5405 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5406 } 5407 } 5408 5409 // parsing end emitting has been merged to reduce code size 5410 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5411 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5412 5413 uint8_t * eir_data; 5414 ad_context_t context; 5415 const uint8_t * name; 5416 uint8_t name_len; 5417 5418 if (size < 3) return; 5419 5420 int event_type = hci_event_packet_get_type(packet); 5421 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5422 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5423 5424 switch (event_type){ 5425 case HCI_EVENT_INQUIRY_RESULT: 5426 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5427 if (size != (3 + (num_responses * 14))) return; 5428 break; 5429 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5430 if (size != 257) return; 5431 if (num_responses != 1) return; 5432 break; 5433 default: 5434 return; 5435 } 5436 5437 // event[1] is set at the end 5438 int i; 5439 for (i=0; i<num_responses;i++){ 5440 memset(event, 0, sizeof(event)); 5441 event[0] = GAP_EVENT_INQUIRY_RESULT; 5442 uint8_t event_size = 27; // if name is not set by EIR 5443 5444 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5445 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5446 (void)memcpy(&event[9], 5447 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5448 3); // class of device 5449 (void)memcpy(&event[12], 5450 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5451 2); // clock offset 5452 5453 switch (event_type){ 5454 case HCI_EVENT_INQUIRY_RESULT: 5455 // 14,15,16,17 = 0, size 18 5456 break; 5457 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5458 event[14] = 1; 5459 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5460 // 16,17 = 0, size 18 5461 break; 5462 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5463 event[14] = 1; 5464 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5465 // EIR packets only contain a single inquiry response 5466 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5467 name = NULL; 5468 // Iterate over EIR data 5469 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5470 uint8_t data_type = ad_iterator_get_data_type(&context); 5471 uint8_t data_size = ad_iterator_get_data_len(&context); 5472 const uint8_t * data = ad_iterator_get_data(&context); 5473 // Prefer Complete Local Name over Shortened Local Name 5474 switch (data_type){ 5475 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5476 if (name) continue; 5477 /* fall through */ 5478 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5479 name = data; 5480 name_len = data_size; 5481 break; 5482 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5483 if (data_size != 8) break; 5484 event[16] = 1; 5485 memcpy(&event[17], data, 8); 5486 break; 5487 default: 5488 break; 5489 } 5490 } 5491 if (name){ 5492 event[25] = 1; 5493 // truncate name if needed 5494 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5495 event[26] = len; 5496 (void)memcpy(&event[27], name, len); 5497 event_size += len; 5498 } 5499 break; 5500 default: 5501 return; 5502 } 5503 event[1] = event_size - 2; 5504 hci_emit_event(event, event_size, 1); 5505 } 5506 } 5507 #endif 5508 5509 void hci_emit_state(void){ 5510 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5511 uint8_t event[3]; 5512 event[0] = BTSTACK_EVENT_STATE; 5513 event[1] = sizeof(event) - 2u; 5514 event[2] = hci_stack->state; 5515 hci_emit_event(event, sizeof(event), 1); 5516 } 5517 5518 #ifdef ENABLE_CLASSIC 5519 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5520 uint8_t event[13]; 5521 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5522 event[1] = sizeof(event) - 2; 5523 event[2] = status; 5524 little_endian_store_16(event, 3, con_handle); 5525 reverse_bd_addr(address, &event[5]); 5526 event[11] = 1; // ACL connection 5527 event[12] = 0; // encryption disabled 5528 hci_emit_event(event, sizeof(event), 1); 5529 } 5530 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5531 if (disable_l2cap_timeouts) return; 5532 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5533 uint8_t event[4]; 5534 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5535 event[1] = sizeof(event) - 2; 5536 little_endian_store_16(event, 2, conn->con_handle); 5537 hci_emit_event(event, sizeof(event), 1); 5538 } 5539 #endif 5540 5541 #ifdef ENABLE_BLE 5542 #ifdef ENABLE_LE_CENTRAL 5543 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){ 5544 uint8_t event[21]; 5545 event[0] = HCI_EVENT_LE_META; 5546 event[1] = sizeof(event) - 2u; 5547 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5548 event[3] = status; 5549 little_endian_store_16(event, 4, con_handle); 5550 event[6] = 0; // TODO: role 5551 event[7] = address_type; 5552 reverse_bd_addr(address, &event[8]); 5553 little_endian_store_16(event, 14, 0); // interval 5554 little_endian_store_16(event, 16, 0); // latency 5555 little_endian_store_16(event, 18, 0); // supervision timeout 5556 event[20] = 0; // master clock accuracy 5557 hci_emit_event(event, sizeof(event), 1); 5558 } 5559 #endif 5560 #endif 5561 5562 static void hci_emit_transport_packet_sent(void){ 5563 // notify upper stack that it might be possible to send again 5564 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5565 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5566 } 5567 5568 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5569 uint8_t event[6]; 5570 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5571 event[1] = sizeof(event) - 2u; 5572 event[2] = 0; // status = OK 5573 little_endian_store_16(event, 3, con_handle); 5574 event[5] = reason; 5575 hci_emit_event(event, sizeof(event), 1); 5576 } 5577 5578 static void hci_emit_nr_connections_changed(void){ 5579 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5580 uint8_t event[3]; 5581 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5582 event[1] = sizeof(event) - 2u; 5583 event[2] = nr_hci_connections(); 5584 hci_emit_event(event, sizeof(event), 1); 5585 } 5586 5587 static void hci_emit_hci_open_failed(void){ 5588 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5589 uint8_t event[2]; 5590 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5591 event[1] = sizeof(event) - 2u; 5592 hci_emit_event(event, sizeof(event), 1); 5593 } 5594 5595 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5596 log_info("hci_emit_dedicated_bonding_result %u ", status); 5597 uint8_t event[9]; 5598 int pos = 0; 5599 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5600 event[pos++] = sizeof(event) - 2u; 5601 event[pos++] = status; 5602 reverse_bd_addr(address, &event[pos]); 5603 hci_emit_event(event, sizeof(event), 1); 5604 } 5605 5606 5607 #ifdef ENABLE_CLASSIC 5608 5609 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5610 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5611 uint8_t event[5]; 5612 int pos = 0; 5613 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5614 event[pos++] = sizeof(event) - 2; 5615 little_endian_store_16(event, 2, con_handle); 5616 pos += 2; 5617 event[pos++] = level; 5618 hci_emit_event(event, sizeof(event), 1); 5619 } 5620 5621 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5622 if (!connection) return LEVEL_0; 5623 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5624 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5625 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5626 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5627 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5628 // LEVEL 4 always requires 128 bit encrytion key size 5629 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5630 security_level = LEVEL_3; 5631 } 5632 return security_level; 5633 } 5634 5635 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5636 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5637 uint8_t event[3]; 5638 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5639 event[1] = sizeof(event) - 2; 5640 event[2] = enabled; 5641 hci_emit_event(event, sizeof(event), 1); 5642 } 5643 5644 // query if remote side supports eSCO 5645 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5646 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5647 if (!connection) return false; 5648 return (connection->remote_supported_features[0] & 1) != 0; 5649 } 5650 5651 static bool hci_ssp_supported(hci_connection_t * connection){ 5652 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5653 return (connection->bonding_flags & mask) == mask; 5654 } 5655 5656 // query if remote side supports SSP 5657 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5658 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5659 if (!connection) return false; 5660 return hci_ssp_supported(connection) ? 1 : 0; 5661 } 5662 5663 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5664 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5665 } 5666 5667 // GAP API 5668 /** 5669 * @bbrief enable/disable bonding. default is enabled 5670 * @praram enabled 5671 */ 5672 void gap_set_bondable_mode(int enable){ 5673 hci_stack->bondable = enable ? 1 : 0; 5674 } 5675 /** 5676 * @brief Get bondable mode. 5677 * @return 1 if bondable 5678 */ 5679 int gap_get_bondable_mode(void){ 5680 return hci_stack->bondable; 5681 } 5682 5683 /** 5684 * @brief map link keys to security levels 5685 */ 5686 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5687 switch (link_key_type){ 5688 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5689 return LEVEL_4; 5690 case COMBINATION_KEY: 5691 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5692 return LEVEL_3; 5693 default: 5694 return LEVEL_2; 5695 } 5696 } 5697 5698 /** 5699 * @brief map link keys to secure connection yes/no 5700 */ 5701 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5702 switch (link_key_type){ 5703 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5704 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5705 return 1; 5706 default: 5707 return 0; 5708 } 5709 } 5710 5711 /** 5712 * @brief map link keys to authenticated 5713 */ 5714 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5715 switch (link_key_type){ 5716 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5717 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5718 return 1; 5719 default: 5720 return 0; 5721 } 5722 } 5723 5724 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5725 log_info("gap_mitm_protection_required_for_security_level %u", level); 5726 return level > LEVEL_2; 5727 } 5728 5729 /** 5730 * @brief get current security level 5731 */ 5732 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5733 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5734 if (!connection) return LEVEL_0; 5735 return gap_security_level_for_connection(connection); 5736 } 5737 5738 /** 5739 * @brief request connection to device to 5740 * @result GAP_AUTHENTICATION_RESULT 5741 */ 5742 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5743 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5744 if (!connection){ 5745 hci_emit_security_level(con_handle, LEVEL_0); 5746 return; 5747 } 5748 5749 btstack_assert(hci_is_le_connection(connection) == false); 5750 5751 // 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) 5752 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5753 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5754 requested_level = LEVEL_4; 5755 } 5756 5757 gap_security_level_t current_level = gap_security_level(con_handle); 5758 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5759 requested_level, connection->requested_security_level, current_level); 5760 5761 // authentication active if authentication request was sent or planned level > 0 5762 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5763 if (authentication_active){ 5764 // authentication already active 5765 if (connection->requested_security_level < requested_level){ 5766 // increase requested level as new level is higher 5767 // TODO: handle re-authentication when done 5768 connection->requested_security_level = requested_level; 5769 } 5770 } else { 5771 // no request active, notify if security sufficient 5772 if (requested_level <= current_level){ 5773 hci_emit_security_level(con_handle, current_level); 5774 return; 5775 } 5776 5777 // store request 5778 connection->requested_security_level = requested_level; 5779 5780 // start to authenticate connection 5781 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5782 hci_run(); 5783 } 5784 } 5785 5786 /** 5787 * @brief start dedicated bonding with device. disconnect after bonding 5788 * @param device 5789 * @param request MITM protection 5790 * @result GAP_DEDICATED_BONDING_COMPLETE 5791 */ 5792 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5793 5794 // create connection state machine 5795 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5796 5797 if (!connection){ 5798 return BTSTACK_MEMORY_ALLOC_FAILED; 5799 } 5800 5801 // delete linkn key 5802 gap_drop_link_key_for_bd_addr(device); 5803 5804 // configure LEVEL_2/3, dedicated bonding 5805 connection->state = SEND_CREATE_CONNECTION; 5806 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5807 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5808 connection->bonding_flags = BONDING_DEDICATED; 5809 5810 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5811 5812 // handle: connnection failure (connection complete != ok) 5813 // handle: authentication failure 5814 // handle: disconnect on done 5815 5816 hci_run(); 5817 5818 return 0; 5819 } 5820 5821 void gap_set_local_name(const char * local_name){ 5822 hci_stack->local_name = local_name; 5823 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5824 // also update EIR if not set by user 5825 if (hci_stack->eir_data == NULL){ 5826 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5827 } 5828 hci_run(); 5829 } 5830 #endif 5831 5832 5833 #ifdef ENABLE_BLE 5834 5835 #ifdef ENABLE_LE_CENTRAL 5836 void gap_start_scan(void){ 5837 hci_stack->le_scanning_enabled = true; 5838 hci_run(); 5839 } 5840 5841 void gap_stop_scan(void){ 5842 hci_stack->le_scanning_enabled = false; 5843 hci_run(); 5844 } 5845 5846 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5847 hci_stack->le_scan_type = scan_type; 5848 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5849 hci_stack->le_scan_interval = scan_interval; 5850 hci_stack->le_scan_window = scan_window; 5851 hci_stack->le_scanning_param_update = true; 5852 hci_run(); 5853 } 5854 5855 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5856 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5857 } 5858 5859 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5860 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5861 if (!conn){ 5862 // disallow if le connection is already outgoing 5863 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5864 log_error("le connection already active"); 5865 return ERROR_CODE_COMMAND_DISALLOWED; 5866 } 5867 5868 log_info("gap_connect: no connection exists yet, creating context"); 5869 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5870 if (!conn){ 5871 // notify client that alloc failed 5872 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5873 log_info("gap_connect: failed to alloc hci_connection_t"); 5874 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5875 } 5876 5877 // set le connecting state 5878 if (hci_is_le_connection_type(addr_type)){ 5879 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5880 } 5881 5882 conn->state = SEND_CREATE_CONNECTION; 5883 log_info("gap_connect: send create connection next"); 5884 hci_run(); 5885 return ERROR_CODE_SUCCESS; 5886 } 5887 5888 if (!hci_is_le_connection(conn) || 5889 (conn->state == SEND_CREATE_CONNECTION) || 5890 (conn->state == SENT_CREATE_CONNECTION)) { 5891 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5892 log_error("gap_connect: classic connection or connect is already being created"); 5893 return GATT_CLIENT_IN_WRONG_STATE; 5894 } 5895 5896 // check if connection was just disconnected 5897 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5898 log_info("gap_connect: send create connection (again)"); 5899 conn->state = SEND_CREATE_CONNECTION; 5900 hci_run(); 5901 return ERROR_CODE_SUCCESS; 5902 } 5903 5904 log_info("gap_connect: context exists with state %u", conn->state); 5905 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5906 hci_run(); 5907 return ERROR_CODE_SUCCESS; 5908 } 5909 5910 // @assumption: only a single outgoing LE Connection exists 5911 static hci_connection_t * gap_get_outgoing_connection(void){ 5912 btstack_linked_item_t *it; 5913 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5914 hci_connection_t * conn = (hci_connection_t *) it; 5915 if (!hci_is_le_connection(conn)) continue; 5916 switch (conn->state){ 5917 case SEND_CREATE_CONNECTION: 5918 case SENT_CREATE_CONNECTION: 5919 case SENT_CANCEL_CONNECTION: 5920 return conn; 5921 default: 5922 break; 5923 }; 5924 } 5925 return NULL; 5926 } 5927 5928 uint8_t gap_connect_cancel(void){ 5929 hci_connection_t * conn = gap_get_outgoing_connection(); 5930 if (!conn) return 0; 5931 switch (conn->state){ 5932 case SEND_CREATE_CONNECTION: 5933 // skip sending create connection and emit event instead 5934 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5935 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5936 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5937 btstack_memory_hci_connection_free( conn ); 5938 break; 5939 case SENT_CREATE_CONNECTION: 5940 // request to send cancel connection 5941 conn->state = SEND_CANCEL_CONNECTION; 5942 hci_run(); 5943 break; 5944 default: 5945 break; 5946 } 5947 return 0; 5948 } 5949 #endif 5950 5951 #ifdef ENABLE_LE_CENTRAL 5952 /** 5953 * @brief Set connection parameters for outgoing connections 5954 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5955 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5956 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5957 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5958 * @param conn_latency, default: 4 5959 * @param supervision_timeout (unit: 10ms), default: 720 ms 5960 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5961 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5962 */ 5963 5964 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5965 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5966 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5967 hci_stack->le_connection_scan_interval = conn_scan_interval; 5968 hci_stack->le_connection_scan_window = conn_scan_window; 5969 hci_stack->le_connection_interval_min = conn_interval_min; 5970 hci_stack->le_connection_interval_max = conn_interval_max; 5971 hci_stack->le_connection_latency = conn_latency; 5972 hci_stack->le_supervision_timeout = supervision_timeout; 5973 hci_stack->le_minimum_ce_length = min_ce_length; 5974 hci_stack->le_maximum_ce_length = max_ce_length; 5975 } 5976 #endif 5977 5978 /** 5979 * @brief Updates the connection parameters for a given LE connection 5980 * @param handle 5981 * @param conn_interval_min (unit: 1.25ms) 5982 * @param conn_interval_max (unit: 1.25ms) 5983 * @param conn_latency 5984 * @param supervision_timeout (unit: 10ms) 5985 * @returns 0 if ok 5986 */ 5987 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5988 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5989 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5990 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5991 connection->le_conn_interval_min = conn_interval_min; 5992 connection->le_conn_interval_max = conn_interval_max; 5993 connection->le_conn_latency = conn_latency; 5994 connection->le_supervision_timeout = supervision_timeout; 5995 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5996 hci_run(); 5997 return 0; 5998 } 5999 6000 /** 6001 * @brief Request an update of the connection parameter for a given LE connection 6002 * @param handle 6003 * @param conn_interval_min (unit: 1.25ms) 6004 * @param conn_interval_max (unit: 1.25ms) 6005 * @param conn_latency 6006 * @param supervision_timeout (unit: 10ms) 6007 * @returns 0 if ok 6008 */ 6009 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6010 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6011 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6012 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6013 connection->le_conn_interval_min = conn_interval_min; 6014 connection->le_conn_interval_max = conn_interval_max; 6015 connection->le_conn_latency = conn_latency; 6016 connection->le_supervision_timeout = supervision_timeout; 6017 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6018 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6019 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6020 return 0; 6021 } 6022 6023 #ifdef ENABLE_LE_PERIPHERAL 6024 6025 /** 6026 * @brief Set Advertisement Data 6027 * @param advertising_data_length 6028 * @param advertising_data (max 31 octets) 6029 * @note data is not copied, pointer has to stay valid 6030 */ 6031 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6032 hci_stack->le_advertisements_data_len = advertising_data_length; 6033 hci_stack->le_advertisements_data = advertising_data; 6034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6035 hci_run(); 6036 } 6037 6038 /** 6039 * @brief Set Scan Response Data 6040 * @param advertising_data_length 6041 * @param advertising_data (max 31 octets) 6042 * @note data is not copied, pointer has to stay valid 6043 */ 6044 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6045 hci_stack->le_scan_response_data_len = scan_response_data_length; 6046 hci_stack->le_scan_response_data = scan_response_data; 6047 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6048 hci_run(); 6049 } 6050 6051 /** 6052 * @brief Set Advertisement Parameters 6053 * @param adv_int_min 6054 * @param adv_int_max 6055 * @param adv_type 6056 * @param direct_address_type 6057 * @param direct_address 6058 * @param channel_map 6059 * @param filter_policy 6060 * 6061 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6062 */ 6063 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6064 uint8_t direct_address_typ, bd_addr_t direct_address, 6065 uint8_t channel_map, uint8_t filter_policy) { 6066 6067 hci_stack->le_advertisements_interval_min = adv_int_min; 6068 hci_stack->le_advertisements_interval_max = adv_int_max; 6069 hci_stack->le_advertisements_type = adv_type; 6070 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6071 hci_stack->le_advertisements_channel_map = channel_map; 6072 hci_stack->le_advertisements_filter_policy = filter_policy; 6073 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6074 6); 6075 6076 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6077 hci_run(); 6078 } 6079 6080 /** 6081 * @brief Enable/Disable Advertisements 6082 * @param enabled 6083 */ 6084 void gap_advertisements_enable(int enabled){ 6085 hci_stack->le_advertisements_enabled = enabled != 0; 6086 hci_update_advertisements_enabled_for_current_roles(); 6087 hci_run(); 6088 } 6089 6090 #endif 6091 6092 void hci_le_set_own_address_type(uint8_t own_address_type){ 6093 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6094 if (own_address_type == hci_stack->le_own_addr_type) return; 6095 hci_stack->le_own_addr_type = own_address_type; 6096 6097 #ifdef ENABLE_LE_PERIPHERAL 6098 // update advertisement parameters, too 6099 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6100 hci_run(); 6101 #endif 6102 #ifdef ENABLE_LE_CENTRAL 6103 // note: we don't update scan parameters or modify ongoing connection attempts 6104 #endif 6105 } 6106 6107 #endif 6108 6109 uint8_t gap_disconnect(hci_con_handle_t handle){ 6110 hci_connection_t * conn = hci_connection_for_handle(handle); 6111 if (!conn){ 6112 hci_emit_disconnection_complete(handle, 0); 6113 return 0; 6114 } 6115 // ignore if already disconnected 6116 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6117 return 0; 6118 } 6119 conn->state = SEND_DISCONNECT; 6120 hci_run(); 6121 return 0; 6122 } 6123 6124 int gap_read_rssi(hci_con_handle_t con_handle){ 6125 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6126 if (hci_connection == NULL) return 0; 6127 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6128 hci_run(); 6129 return 1; 6130 } 6131 6132 /** 6133 * @brief Get connection type 6134 * @param con_handle 6135 * @result connection_type 6136 */ 6137 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6138 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6139 if (!conn) return GAP_CONNECTION_INVALID; 6140 switch (conn->address_type){ 6141 case BD_ADDR_TYPE_LE_PUBLIC: 6142 case BD_ADDR_TYPE_LE_RANDOM: 6143 return GAP_CONNECTION_LE; 6144 case BD_ADDR_TYPE_SCO: 6145 return GAP_CONNECTION_SCO; 6146 case BD_ADDR_TYPE_ACL: 6147 return GAP_CONNECTION_ACL; 6148 default: 6149 return GAP_CONNECTION_INVALID; 6150 } 6151 } 6152 6153 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6154 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6155 if (!conn) return HCI_ROLE_INVALID; 6156 return (hci_role_t) conn->role; 6157 } 6158 6159 6160 #ifdef ENABLE_CLASSIC 6161 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6162 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6163 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6164 conn->request_role = role; 6165 hci_run(); 6166 return ERROR_CODE_SUCCESS; 6167 } 6168 #endif 6169 6170 #ifdef ENABLE_BLE 6171 6172 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){ 6173 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6174 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6175 6176 conn->le_phy_update_all_phys = all_phys; 6177 conn->le_phy_update_tx_phys = tx_phys; 6178 conn->le_phy_update_rx_phys = rx_phys; 6179 conn->le_phy_update_phy_options = phy_options; 6180 6181 hci_run(); 6182 6183 return 0; 6184 } 6185 6186 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6187 // check if already in list 6188 btstack_linked_list_iterator_t it; 6189 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6190 while (btstack_linked_list_iterator_has_next(&it)) { 6191 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6192 if (entry->address_type != address_type) { 6193 continue; 6194 } 6195 if (memcmp(entry->address, address, 6) != 0) { 6196 continue; 6197 } 6198 // disallow if already scheduled to add 6199 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6200 return ERROR_CODE_COMMAND_DISALLOWED; 6201 } 6202 // still on controller, but scheduled to remove -> re-add 6203 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6204 return ERROR_CODE_SUCCESS; 6205 } 6206 // alloc and add to list 6207 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6208 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6209 entry->address_type = address_type; 6210 (void)memcpy(entry->address, address, 6); 6211 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6212 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6213 return ERROR_CODE_SUCCESS; 6214 } 6215 6216 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6217 btstack_linked_list_iterator_t it; 6218 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6219 while (btstack_linked_list_iterator_has_next(&it)){ 6220 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6221 if (entry->address_type != address_type) { 6222 continue; 6223 } 6224 if (memcmp(entry->address, address, 6) != 0) { 6225 continue; 6226 } 6227 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6228 // remove from controller if already present 6229 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6230 } else { 6231 // directly remove entry from whitelist 6232 btstack_linked_list_iterator_remove(&it); 6233 btstack_memory_whitelist_entry_free(entry); 6234 } 6235 return ERROR_CODE_SUCCESS; 6236 } 6237 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6238 } 6239 6240 static void hci_whitelist_clear(void){ 6241 btstack_linked_list_iterator_t it; 6242 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6243 while (btstack_linked_list_iterator_has_next(&it)){ 6244 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6245 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6246 // remove from controller if already present 6247 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6248 continue; 6249 } 6250 // directly remove entry from whitelist 6251 btstack_linked_list_iterator_remove(&it); 6252 btstack_memory_whitelist_entry_free(entry); 6253 } 6254 } 6255 6256 /** 6257 * @brief Clear Whitelist 6258 * @returns 0 if ok 6259 */ 6260 uint8_t gap_whitelist_clear(void){ 6261 hci_whitelist_clear(); 6262 hci_run(); 6263 return ERROR_CODE_SUCCESS; 6264 } 6265 6266 /** 6267 * @brief Add Device to Whitelist 6268 * @param address_typ 6269 * @param address 6270 * @returns 0 if ok 6271 */ 6272 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6273 uint8_t status = hci_whitelist_add(address_type, address); 6274 if (status){ 6275 return status; 6276 } 6277 hci_run(); 6278 return ERROR_CODE_SUCCESS; 6279 } 6280 6281 /** 6282 * @brief Remove Device from Whitelist 6283 * @param address_typ 6284 * @param address 6285 * @returns 0 if ok 6286 */ 6287 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6288 uint8_t status = hci_whitelist_remove(address_type, address); 6289 if (status){ 6290 return status; 6291 } 6292 hci_run(); 6293 return ERROR_CODE_SUCCESS; 6294 } 6295 6296 #ifdef ENABLE_LE_CENTRAL 6297 /** 6298 * @brief Connect with Whitelist 6299 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6300 * @returns - if ok 6301 */ 6302 uint8_t gap_connect_with_whitelist(void){ 6303 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6304 return ERROR_CODE_COMMAND_DISALLOWED; 6305 } 6306 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6307 hci_run(); 6308 return ERROR_CODE_SUCCESS; 6309 } 6310 6311 /** 6312 * @brief Auto Connection Establishment - Start Connecting to device 6313 * @param address_typ 6314 * @param address 6315 * @returns 0 if ok 6316 */ 6317 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6318 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6319 return ERROR_CODE_COMMAND_DISALLOWED; 6320 } 6321 6322 uint8_t status = hci_whitelist_add(address_type, address); 6323 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6324 return status; 6325 } 6326 6327 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6328 6329 hci_run(); 6330 return ERROR_CODE_SUCCESS; 6331 } 6332 6333 /** 6334 * @brief Auto Connection Establishment - Stop Connecting to device 6335 * @param address_typ 6336 * @param address 6337 * @returns 0 if ok 6338 */ 6339 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6340 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6341 return ERROR_CODE_COMMAND_DISALLOWED; 6342 } 6343 6344 hci_whitelist_remove(address_type, address); 6345 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6346 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6347 } 6348 hci_run(); 6349 return 0; 6350 } 6351 6352 /** 6353 * @brief Auto Connection Establishment - Stop everything 6354 * @note Convenience function to stop all active auto connection attempts 6355 */ 6356 uint8_t gap_auto_connection_stop_all(void){ 6357 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6358 return ERROR_CODE_COMMAND_DISALLOWED; 6359 } 6360 hci_whitelist_clear(); 6361 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6362 hci_run(); 6363 return ERROR_CODE_SUCCESS; 6364 } 6365 6366 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6367 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6368 if (!conn) return 0; 6369 return conn->le_connection_interval; 6370 } 6371 #endif 6372 #endif 6373 6374 #ifdef ENABLE_CLASSIC 6375 /** 6376 * @brief Set Extended Inquiry Response data 6377 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6378 * @note has to be done before stack starts up 6379 */ 6380 void gap_set_extended_inquiry_response(const uint8_t * data){ 6381 hci_stack->eir_data = data; 6382 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6383 hci_run(); 6384 } 6385 6386 /** 6387 * @brief Start GAP Classic Inquiry 6388 * @param duration in 1.28s units 6389 * @return 0 if ok 6390 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6391 */ 6392 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6393 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6394 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6395 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6396 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6397 } 6398 hci_stack->inquiry_state = duration_in_1280ms_units; 6399 hci_run(); 6400 return 0; 6401 } 6402 6403 /** 6404 * @brief Stop GAP Classic Inquiry 6405 * @returns 0 if ok 6406 */ 6407 int gap_inquiry_stop(void){ 6408 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6409 // emit inquiry complete event, before it even started 6410 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6411 hci_emit_event(event, sizeof(event), 1); 6412 return 0; 6413 } 6414 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6415 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6416 hci_run(); 6417 return 0; 6418 } 6419 6420 void gap_inquiry_set_lap(uint32_t lap){ 6421 hci_stack->inquiry_lap = lap; 6422 } 6423 6424 6425 /** 6426 * @brief Remote Name Request 6427 * @param addr 6428 * @param page_scan_repetition_mode 6429 * @param clock_offset only used when bit 15 is set 6430 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6431 */ 6432 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6433 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6434 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6435 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6436 hci_stack->remote_name_clock_offset = clock_offset; 6437 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6438 hci_run(); 6439 return 0; 6440 } 6441 6442 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6443 hci_stack->gap_pairing_state = state; 6444 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6445 hci_run(); 6446 return 0; 6447 } 6448 6449 /** 6450 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6451 * @param addr 6452 * @param pin_data 6453 * @param pin_len 6454 * @return 0 if ok 6455 */ 6456 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6457 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6458 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6459 hci_stack->gap_pairing_pin_len = pin_len; 6460 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6461 } 6462 6463 /** 6464 * @brief Legacy Pairing Pin Code Response 6465 * @param addr 6466 * @param pin 6467 * @return 0 if ok 6468 */ 6469 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6470 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6471 } 6472 6473 /** 6474 * @brief Abort Legacy Pairing 6475 * @param addr 6476 * @param pin 6477 * @return 0 if ok 6478 */ 6479 int gap_pin_code_negative(bd_addr_t addr){ 6480 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6481 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6482 } 6483 6484 /** 6485 * @brief SSP Passkey Response 6486 * @param addr 6487 * @param passkey 6488 * @return 0 if ok 6489 */ 6490 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6491 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6492 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6493 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6494 } 6495 6496 /** 6497 * @brief Abort SSP Passkey Entry/Pairing 6498 * @param addr 6499 * @param pin 6500 * @return 0 if ok 6501 */ 6502 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6505 } 6506 6507 /** 6508 * @brief Accept SSP Numeric Comparison 6509 * @param addr 6510 * @param passkey 6511 * @return 0 if ok 6512 */ 6513 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6514 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6515 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6516 } 6517 6518 /** 6519 * @brief Abort SSP Numeric Comparison/Pairing 6520 * @param addr 6521 * @param pin 6522 * @return 0 if ok 6523 */ 6524 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6525 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6526 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6527 } 6528 6529 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6530 6531 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6532 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6533 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6534 connectionSetAuthenticationFlags(conn, flag); 6535 hci_run(); 6536 return ERROR_CODE_SUCCESS; 6537 } 6538 6539 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6540 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6541 } 6542 6543 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6544 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6545 } 6546 #endif 6547 6548 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6549 /** 6550 * @brief Report Remote OOB Data 6551 * @param bd_addr 6552 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6553 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6554 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6555 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6556 */ 6557 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){ 6558 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6559 if (connection == NULL) { 6560 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6561 } 6562 connection->classic_oob_c_192 = c_192; 6563 connection->classic_oob_r_192 = r_192; 6564 6565 // ignore P-256 if not supported by us 6566 if (hci_stack->secure_connections_active){ 6567 connection->classic_oob_c_256 = c_256; 6568 connection->classic_oob_r_256 = r_256; 6569 } 6570 6571 return ERROR_CODE_SUCCESS; 6572 } 6573 /** 6574 * @brief Generate new OOB data 6575 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6576 */ 6577 void gap_ssp_generate_oob_data(void){ 6578 hci_stack->classic_read_local_oob_data = true; 6579 hci_run(); 6580 } 6581 6582 #endif 6583 6584 /** 6585 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6586 * @param inquiry_mode see bluetooth_defines.h 6587 */ 6588 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6589 hci_stack->inquiry_mode = inquiry_mode; 6590 } 6591 6592 /** 6593 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6594 */ 6595 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6596 hci_stack->sco_voice_setting = voice_setting; 6597 } 6598 6599 /** 6600 * @brief Get SCO Voice Setting 6601 * @return current voice setting 6602 */ 6603 uint16_t hci_get_sco_voice_setting(void){ 6604 return hci_stack->sco_voice_setting; 6605 } 6606 6607 static int hci_have_usb_transport(void){ 6608 if (!hci_stack->hci_transport) return 0; 6609 const char * transport_name = hci_stack->hci_transport->name; 6610 if (!transport_name) return 0; 6611 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6612 } 6613 6614 /** @brief Get SCO packet length for current SCO Voice setting 6615 * @note Using SCO packets of the exact length is required for USB transfer 6616 * @return Length of SCO packets in bytes (not audio frames) 6617 */ 6618 uint16_t hci_get_sco_packet_length(void){ 6619 uint16_t sco_packet_length = 0; 6620 6621 #ifdef ENABLE_SCO_OVER_HCI 6622 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6623 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6624 6625 if (hci_have_usb_transport()){ 6626 // see Core Spec for H2 USB Transfer. 6627 // 3 byte SCO header + 24 bytes per connection 6628 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6629 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6630 } else { 6631 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6632 sco_packet_length = 3 + 60 * multiplier; 6633 // assert that it still fits inside an SCO buffer 6634 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6635 sco_packet_length = 3 + 60; 6636 } 6637 } 6638 #endif 6639 6640 #ifdef HAVE_SCO_TRANSPORT 6641 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6642 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6643 sco_packet_length = 3 + 60 * multiplier; 6644 #endif 6645 return sco_packet_length; 6646 } 6647 6648 /** 6649 * @brief Sets the master/slave policy 6650 * @param policy (0: attempt to become master, 1: let connecting device decide) 6651 */ 6652 void hci_set_master_slave_policy(uint8_t policy){ 6653 hci_stack->master_slave_policy = policy; 6654 } 6655 6656 #endif 6657 6658 HCI_STATE hci_get_state(void){ 6659 return hci_stack->state; 6660 } 6661 6662 #ifdef ENABLE_CLASSIC 6663 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6664 hci_stack->gap_classic_accept_callback = accept_callback; 6665 } 6666 #endif 6667 6668 /** 6669 * @brief Set callback for Bluetooth Hardware Error 6670 */ 6671 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6672 hci_stack->hardware_error_callback = fn; 6673 } 6674 6675 void hci_disconnect_all(void){ 6676 btstack_linked_list_iterator_t it; 6677 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6678 while (btstack_linked_list_iterator_has_next(&it)){ 6679 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6680 if (con->state == SENT_DISCONNECT) continue; 6681 con->state = SEND_DISCONNECT; 6682 } 6683 hci_run(); 6684 } 6685 6686 uint16_t hci_get_manufacturer(void){ 6687 return hci_stack->manufacturer; 6688 } 6689 6690 #ifdef ENABLE_BLE 6691 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6692 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6693 if (!hci_con) return NULL; 6694 return &hci_con->sm_connection; 6695 } 6696 6697 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6698 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6699 #endif 6700 6701 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6702 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6703 if (hci_connection == NULL) return 0; 6704 if (hci_is_le_connection(hci_connection)){ 6705 #ifdef ENABLE_BLE 6706 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6707 if (sm_conn->sm_connection_encrypted) { 6708 return sm_conn->sm_actual_encryption_key_size; 6709 } 6710 #endif 6711 } else { 6712 #ifdef ENABLE_CLASSIC 6713 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6714 return hci_connection->encryption_key_size; 6715 } 6716 #endif 6717 } 6718 return 0; 6719 } 6720 6721 int gap_authenticated(hci_con_handle_t con_handle){ 6722 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6723 if (hci_connection == NULL) return 0; 6724 6725 switch (hci_connection->address_type){ 6726 #ifdef ENABLE_BLE 6727 case BD_ADDR_TYPE_LE_PUBLIC: 6728 case BD_ADDR_TYPE_LE_RANDOM: 6729 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6730 return hci_connection->sm_connection.sm_connection_authenticated; 6731 #endif 6732 #ifdef ENABLE_CLASSIC 6733 case BD_ADDR_TYPE_SCO: 6734 case BD_ADDR_TYPE_ACL: 6735 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6736 #endif 6737 default: 6738 return 0; 6739 } 6740 } 6741 6742 int gap_secure_connection(hci_con_handle_t con_handle){ 6743 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6744 if (hci_connection == NULL) return 0; 6745 6746 switch (hci_connection->address_type){ 6747 #ifdef ENABLE_BLE 6748 case BD_ADDR_TYPE_LE_PUBLIC: 6749 case BD_ADDR_TYPE_LE_RANDOM: 6750 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6751 return hci_connection->sm_connection.sm_connection_sc; 6752 #endif 6753 #ifdef ENABLE_CLASSIC 6754 case BD_ADDR_TYPE_SCO: 6755 case BD_ADDR_TYPE_ACL: 6756 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6757 #endif 6758 default: 6759 return 0; 6760 } 6761 } 6762 6763 bool gap_bonded(hci_con_handle_t con_handle){ 6764 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6765 if (hci_connection == NULL) return 0; 6766 6767 #ifdef ENABLE_CLASSIC 6768 link_key_t link_key; 6769 link_key_type_t link_key_type; 6770 #endif 6771 switch (hci_connection->address_type){ 6772 #ifdef ENABLE_BLE 6773 case BD_ADDR_TYPE_LE_PUBLIC: 6774 case BD_ADDR_TYPE_LE_RANDOM: 6775 return hci_connection->sm_connection.sm_le_db_index >= 0; 6776 #endif 6777 #ifdef ENABLE_CLASSIC 6778 case BD_ADDR_TYPE_SCO: 6779 case BD_ADDR_TYPE_ACL: 6780 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6781 #endif 6782 default: 6783 return false; 6784 } 6785 } 6786 6787 #ifdef ENABLE_BLE 6788 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6789 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6790 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6791 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6792 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6793 return sm_conn->sm_connection_authorization_state; 6794 } 6795 #endif 6796 6797 #ifdef ENABLE_CLASSIC 6798 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){ 6799 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6800 if (!conn) return GAP_CONNECTION_INVALID; 6801 conn->sniff_min_interval = sniff_min_interval; 6802 conn->sniff_max_interval = sniff_max_interval; 6803 conn->sniff_attempt = sniff_attempt; 6804 conn->sniff_timeout = sniff_timeout; 6805 hci_run(); 6806 return 0; 6807 } 6808 6809 /** 6810 * @brief Exit Sniff mode 6811 * @param con_handle 6812 @ @return 0 if ok 6813 */ 6814 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6815 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6816 if (!conn) return GAP_CONNECTION_INVALID; 6817 conn->sniff_min_interval = 0xffff; 6818 hci_run(); 6819 return 0; 6820 } 6821 6822 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){ 6823 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6824 if (!conn) return GAP_CONNECTION_INVALID; 6825 conn->sniff_subrating_max_latency = max_latency; 6826 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6827 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6828 hci_run(); 6829 return ERROR_CODE_SUCCESS; 6830 } 6831 6832 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){ 6833 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6834 if (!conn) return GAP_CONNECTION_INVALID; 6835 conn->qos_service_type = service_type; 6836 conn->qos_token_rate = token_rate; 6837 conn->qos_peak_bandwidth = peak_bandwidth; 6838 conn->qos_latency = latency; 6839 conn->qos_delay_variation = delay_variation; 6840 hci_run(); 6841 return ERROR_CODE_SUCCESS; 6842 } 6843 6844 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6845 hci_stack->new_page_scan_interval = page_scan_interval; 6846 hci_stack->new_page_scan_window = page_scan_window; 6847 hci_run(); 6848 } 6849 6850 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6851 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6852 hci_run(); 6853 } 6854 6855 #endif 6856 6857 void hci_halting_defer(void){ 6858 if (hci_stack->state != HCI_STATE_HALTING) return; 6859 switch (hci_stack->substate){ 6860 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6861 case HCI_HALTING_CLOSE: 6862 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6863 break; 6864 default: 6865 break; 6866 } 6867 } 6868 6869 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6870 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6871 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6872 if (le_device_db_index >= le_device_db_max_count()) return; 6873 uint8_t offset = le_device_db_index >> 3; 6874 uint8_t mask = 1 << (le_device_db_index & 7); 6875 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6876 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6877 // note: go back to remove entries, otherwise, a remove + add will skip the add 6878 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6879 } 6880 } 6881 6882 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6883 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6884 if (le_device_db_index >= le_device_db_max_count()) return; 6885 uint8_t offset = le_device_db_index >> 3; 6886 uint8_t mask = 1 << (le_device_db_index & 7); 6887 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6888 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6889 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6890 } 6891 } 6892 6893 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6894 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6895 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6896 } 6897 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6898 // restart le resolving list update 6899 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6900 } 6901 return ERROR_CODE_SUCCESS; 6902 } 6903 #endif 6904 6905 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6906 void hci_setup_test_connections_fuzz(void){ 6907 hci_connection_t * conn; 6908 6909 // default address: 66:55:44:33:00:01 6910 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6911 6912 // setup Controller info 6913 hci_stack->num_cmd_packets = 255; 6914 hci_stack->acl_packets_total_num = 255; 6915 6916 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6917 addr[5] = 0x01; 6918 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6919 conn->con_handle = addr[5]; 6920 conn->role = HCI_ROLE_SLAVE; 6921 conn->state = RECEIVED_CONNECTION_REQUEST; 6922 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6923 6924 // setup incoming Classic SCO connection with con handle 0x0002 6925 addr[5] = 0x02; 6926 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6927 conn->con_handle = addr[5]; 6928 conn->role = HCI_ROLE_SLAVE; 6929 conn->state = RECEIVED_CONNECTION_REQUEST; 6930 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6931 6932 // setup ready Classic ACL connection with con handle 0x0003 6933 addr[5] = 0x03; 6934 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6935 conn->con_handle = addr[5]; 6936 conn->role = HCI_ROLE_SLAVE; 6937 conn->state = OPEN; 6938 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6939 6940 // setup ready Classic SCO connection with con handle 0x0004 6941 addr[5] = 0x04; 6942 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6943 conn->con_handle = addr[5]; 6944 conn->role = HCI_ROLE_SLAVE; 6945 conn->state = OPEN; 6946 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6947 6948 // setup ready LE ACL connection with con handle 0x005 and public address 6949 addr[5] = 0x05; 6950 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6951 conn->con_handle = addr[5]; 6952 conn->role = HCI_ROLE_SLAVE; 6953 conn->state = OPEN; 6954 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6955 conn->sm_connection.sm_connection_encrypted = 1; 6956 } 6957 6958 void hci_free_connections_fuzz(void){ 6959 btstack_linked_list_iterator_t it; 6960 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6961 while (btstack_linked_list_iterator_has_next(&it)){ 6962 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6963 btstack_linked_list_iterator_remove(&it); 6964 btstack_memory_hci_connection_free(con); 6965 } 6966 } 6967 void hci_simulate_working_fuzz(void){ 6968 hci_init_done(); 6969 hci_stack->num_cmd_packets = 255; 6970 } 6971 #endif 6972