1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 156 static void hci_emit_transport_packet_sent(void); 157 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 158 static void hci_emit_nr_connections_changed(void); 159 static void hci_emit_hci_open_failed(void); 160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 161 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 162 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 163 static void hci_run(void); 164 static int hci_is_le_connection(hci_connection_t * connection); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 169 #endif 170 171 #ifdef ENABLE_BLE 172 #ifdef ENABLE_LE_CENTRAL 173 // called from test/ble_client/advertising_data_parser.c 174 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 176 static void hci_whitelist_free(void); 177 static hci_connection_t * gap_get_outgoing_connection(void); 178 #endif 179 #endif 180 181 // the STACK is here 182 #ifndef HAVE_MALLOC 183 static hci_stack_t hci_stack_static; 184 #endif 185 static hci_stack_t * hci_stack = NULL; 186 187 #ifdef ENABLE_CLASSIC 188 // default name 189 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 190 191 // test helper 192 static uint8_t disable_l2cap_timeouts = 0; 193 #endif 194 195 // reset connection state on create and on reconnect 196 // don't overwrite addr, con handle, role 197 static void hci_connection_init(hci_connection_t * conn){ 198 conn->authentication_flags = AUTH_FLAG_NONE; 199 conn->bonding_flags = 0; 200 conn->requested_security_level = LEVEL_0; 201 #ifdef ENABLE_CLASSIC 202 conn->request_role = HCI_ROLE_INVALID; 203 conn->sniff_subrating_max_latency = 0xffff; 204 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 205 conn->link_key_type = INVALID_LINK_KEY; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 #ifdef ENABLE_CLASSIC_PAIRING_OOB 222 conn->classic_oob_c_192 = NULL; 223 conn->classic_oob_r_192 = NULL; 224 conn->classic_oob_c_256 = NULL; 225 conn->classic_oob_r_256 = NULL; 226 #endif 227 } 228 229 /** 230 * create connection for given address 231 * 232 * @return connection OR NULL, if no memory left 233 */ 234 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 235 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 236 237 hci_connection_t * conn = btstack_memory_hci_connection_get(); 238 if (!conn) return NULL; 239 hci_connection_init(conn); 240 241 bd_addr_copy(conn->address, addr); 242 conn->address_type = addr_type; 243 conn->con_handle = HCI_CON_HANDLE_INVALID; 244 conn->role = HCI_ROLE_INVALID; 245 246 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 247 248 return conn; 249 } 250 251 252 /** 253 * get le connection parameter range 254 * 255 * @return le connection parameter range struct 256 */ 257 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 258 *range = hci_stack->le_connection_parameter_range; 259 } 260 261 /** 262 * set le connection parameter range 263 * 264 */ 265 266 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 267 hci_stack->le_connection_parameter_range = *range; 268 } 269 270 /** 271 * @brief Test if connection parameters are inside in existing rage 272 * @param conn_interval_min (unit: 1.25ms) 273 * @param conn_interval_max (unit: 1.25ms) 274 * @param conn_latency 275 * @param supervision_timeout (unit: 10ms) 276 * @return 1 if included 277 */ 278 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 279 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 280 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 281 282 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 283 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 284 285 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 286 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 287 288 return 1; 289 } 290 291 /** 292 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 293 * @note: default: 1 294 * @param max_peripheral_connections 295 */ 296 #ifdef ENABLE_LE_PERIPHERAL 297 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 298 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 299 } 300 #endif 301 302 /** 303 * get hci connections iterator 304 * 305 * @return hci connections iterator 306 */ 307 308 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 309 btstack_linked_list_iterator_init(it, &hci_stack->connections); 310 } 311 312 /** 313 * get connection for a given handle 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if ( item->con_handle == con_handle ) { 323 return item; 324 } 325 } 326 return NULL; 327 } 328 329 /** 330 * get connection for given address 331 * 332 * @return connection OR NULL, if not found 333 */ 334 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 335 btstack_linked_list_iterator_t it; 336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 337 while (btstack_linked_list_iterator_has_next(&it)){ 338 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 339 if (connection->address_type != addr_type) continue; 340 if (memcmp(addr, connection->address, 6) != 0) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 348 } 349 350 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 352 } 353 354 #ifdef ENABLE_CLASSIC 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int hci_number_sco_connections(void){ 358 int connections = 0; 359 btstack_linked_list_iterator_t it; 360 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 361 while (btstack_linked_list_iterator_has_next(&it)){ 362 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 363 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 364 connections++; 365 } 366 return connections; 367 } 368 #endif 369 370 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 371 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 372 #ifdef HAVE_EMBEDDED_TICK 373 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 374 // connections might be timed out 375 hci_emit_l2cap_check_timeout(connection); 376 } 377 #else 378 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 379 // connections might be timed out 380 hci_emit_l2cap_check_timeout(connection); 381 } 382 #endif 383 } 384 385 static void hci_connection_timestamp(hci_connection_t *connection){ 386 #ifdef HAVE_EMBEDDED_TICK 387 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 388 #else 389 connection->timestamp = btstack_run_loop_get_time_ms(); 390 #endif 391 } 392 393 /** 394 * add authentication flags and reset timer 395 * @note: assumes classic connection 396 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 397 */ 398 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 399 bd_addr_t addr; 400 reverse_bd_addr(bd_addr, addr); 401 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 402 if (conn) { 403 connectionSetAuthenticationFlags(conn, flags); 404 hci_connection_timestamp(conn); 405 } 406 } 407 408 static bool hci_pairing_active(hci_connection_t * hci_connection){ 409 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 410 } 411 412 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 413 if (hci_pairing_active(hci_connection)) return; 414 if (ssp){ 415 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 416 } else { 417 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 418 } 419 // if we are initiator, we have sent an HCI Authenticate Request 420 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 421 422 // if we are responder, use minimal service security level as required level 423 if (!initiator){ 424 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 425 } 426 427 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 428 429 uint8_t event[12]; 430 event[0] = GAP_EVENT_PAIRING_STARTED; 431 event[1] = 10; 432 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 433 reverse_bd_addr(hci_connection->address, &event[4]); 434 event[10] = (uint8_t) ssp; 435 event[11] = (uint8_t) initiator; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 440 hci_connection->requested_security_level = LEVEL_0; 441 if (!hci_pairing_active(hci_connection)) return; 442 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 443 #ifdef ENABLE_CLASSIC_PAIRING_OOB 444 hci_connection->classic_oob_c_192 = NULL; 445 hci_connection->classic_oob_r_192 = NULL; 446 hci_connection->classic_oob_c_256 = NULL; 447 hci_connection->classic_oob_r_256 = NULL; 448 #endif 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[11]; 452 event[0] = GAP_EVENT_PAIRING_COMPLETE; 453 event[1] = 9; 454 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 455 reverse_bd_addr(hci_connection->address, &event[4]); 456 event[10] = status; 457 hci_emit_event(event, sizeof(event), 1); 458 } 459 460 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 461 hci_connection_t * conn = hci_connection_for_handle(handle); 462 if (!conn) return false; 463 return hci_pairing_active(conn); 464 } 465 466 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 467 if (!hci_stack->link_key_db) return; 468 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 469 hci_stack->link_key_db->delete_link_key(addr); 470 } 471 472 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 473 if (!hci_stack->link_key_db) return; 474 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 475 hci_stack->link_key_db->put_link_key(addr, link_key, type); 476 } 477 478 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 479 if (!hci_stack->link_key_db) return false; 480 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 481 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 482 return result; 483 } 484 485 void gap_delete_all_link_keys(void){ 486 bd_addr_t addr; 487 link_key_t link_key; 488 link_key_type_t type; 489 btstack_link_key_iterator_t it; 490 int ok = gap_link_key_iterator_init(&it); 491 if (!ok) { 492 log_error("could not initialize iterator"); 493 return; 494 } 495 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 496 gap_drop_link_key_for_bd_addr(addr); 497 } 498 gap_link_key_iterator_done(&it); 499 } 500 501 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 502 if (!hci_stack->link_key_db) return 0; 503 if (!hci_stack->link_key_db->iterator_init) return 0; 504 return hci_stack->link_key_db->iterator_init(it); 505 } 506 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 507 if (!hci_stack->link_key_db) return 0; 508 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 509 } 510 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 511 if (!hci_stack->link_key_db) return; 512 hci_stack->link_key_db->iterator_done(it); 513 } 514 #endif 515 516 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 517 switch (address_type){ 518 case BD_ADDR_TYPE_LE_PUBLIC: 519 case BD_ADDR_TYPE_LE_RANDOM: 520 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 522 return true; 523 default: 524 return false; 525 } 526 } 527 528 static int hci_is_le_connection(hci_connection_t * connection){ 529 return hci_is_le_connection_type(connection->address_type); 530 } 531 532 /** 533 * count connections 534 */ 535 static int nr_hci_connections(void){ 536 int count = 0; 537 btstack_linked_item_t *it; 538 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 539 count++; 540 } 541 return count; 542 } 543 544 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 545 546 unsigned int num_packets_sent_classic = 0; 547 unsigned int num_packets_sent_le = 0; 548 549 btstack_linked_item_t *it; 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (hci_is_le_connection(connection)){ 553 num_packets_sent_le += connection->num_packets_sent; 554 } 555 if (connection->address_type == BD_ADDR_TYPE_ACL){ 556 num_packets_sent_classic += connection->num_packets_sent; 557 } 558 } 559 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 560 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 561 int free_slots_le = 0; 562 563 if (free_slots_classic < 0){ 564 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 565 return 0; 566 } 567 568 if (hci_stack->le_acl_packets_total_num){ 569 // if we have LE slots, they are used 570 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 571 if (free_slots_le < 0){ 572 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 573 return 0; 574 } 575 } else { 576 // otherwise, classic slots are used for LE, too 577 free_slots_classic -= num_packets_sent_le; 578 if (free_slots_classic < 0){ 579 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 580 return 0; 581 } 582 } 583 584 switch (address_type){ 585 case BD_ADDR_TYPE_UNKNOWN: 586 log_error("hci_number_free_acl_slots: unknown address type"); 587 return 0; 588 589 case BD_ADDR_TYPE_ACL: 590 return (uint16_t) free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num > 0){ 594 return (uint16_t) free_slots_le; 595 } 596 return (uint16_t) free_slots_classic; 597 } 598 } 599 600 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 601 // get connection type 602 hci_connection_t * connection = hci_connection_for_handle(con_handle); 603 if (!connection){ 604 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 605 return 0; 606 } 607 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 608 } 609 610 #ifdef ENABLE_CLASSIC 611 static int hci_number_free_sco_slots(void){ 612 unsigned int num_sco_packets_sent = 0; 613 btstack_linked_item_t *it; 614 if (hci_stack->synchronous_flow_control_enabled){ 615 // explicit flow control 616 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 617 hci_connection_t * connection = (hci_connection_t *) it; 618 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 619 num_sco_packets_sent += connection->num_packets_sent; 620 } 621 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 622 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 623 return 0; 624 } 625 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 626 } else { 627 // implicit flow control -- TODO 628 int num_ready = 0; 629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 630 hci_connection_t * connection = (hci_connection_t *) it; 631 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 632 if (connection->sco_tx_ready == 0) continue; 633 num_ready++; 634 } 635 return num_ready; 636 } 637 } 638 #endif 639 640 // only used to send HCI Host Number Completed Packets 641 static int hci_can_send_comand_packet_transport(void){ 642 if (hci_stack->hci_packet_buffer_reserved) return 0; 643 644 // check for async hci transport implementations 645 if (hci_stack->hci_transport->can_send_packet_now){ 646 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 647 return 0; 648 } 649 } 650 return 1; 651 } 652 653 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 654 bool hci_can_send_command_packet_now(void){ 655 if (hci_can_send_comand_packet_transport() == 0) return false; 656 return hci_stack->num_cmd_packets > 0u; 657 } 658 659 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 660 // check for async hci transport implementations 661 if (!hci_stack->hci_transport->can_send_packet_now) return true; 662 return hci_stack->hci_transport->can_send_packet_now(packet_type); 663 } 664 665 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 668 } 669 670 bool hci_can_send_acl_le_packet_now(void){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 673 } 674 675 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 676 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 677 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 678 } 679 680 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_acl_packet_now(con_handle); 683 } 684 685 #ifdef ENABLE_CLASSIC 686 bool hci_can_send_acl_classic_packet_now(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return false; 688 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 689 } 690 691 bool hci_can_send_prepared_sco_packet_now(void){ 692 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 693 if (hci_have_usb_transport()){ 694 return hci_stack->sco_can_send_now; 695 } else { 696 return hci_number_free_sco_slots() > 0; 697 } 698 } 699 700 bool hci_can_send_sco_packet_now(void){ 701 if (hci_stack->hci_packet_buffer_reserved) return false; 702 return hci_can_send_prepared_sco_packet_now(); 703 } 704 705 void hci_request_sco_can_send_now_event(void){ 706 hci_stack->sco_waiting_for_can_send_now = 1; 707 hci_notify_if_sco_can_send_now(); 708 } 709 #endif 710 711 // used for internal checks in l2cap.c 712 bool hci_is_packet_buffer_reserved(void){ 713 return hci_stack->hci_packet_buffer_reserved; 714 } 715 716 // reserves outgoing packet buffer. 717 // @return 1 if successful 718 bool hci_reserve_packet_buffer(void){ 719 if (hci_stack->hci_packet_buffer_reserved) { 720 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 721 return false; 722 } 723 hci_stack->hci_packet_buffer_reserved = true; 724 return true; 725 } 726 727 void hci_release_packet_buffer(void){ 728 hci_stack->hci_packet_buffer_reserved = false; 729 } 730 731 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 732 static int hci_transport_synchronous(void){ 733 return hci_stack->hci_transport->can_send_packet_now == NULL; 734 } 735 736 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 737 738 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 739 740 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 741 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 742 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 743 max_acl_data_packet_length = hci_stack->le_data_packets_length; 744 } 745 746 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 747 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 748 max_acl_data_packet_length = connection->le_max_tx_octets; 749 } 750 #endif 751 752 log_debug("hci_send_acl_packet_fragments entered"); 753 754 uint8_t status = ERROR_CODE_SUCCESS; 755 // multiple packets could be send on a synchronous HCI transport 756 while (true){ 757 758 log_debug("hci_send_acl_packet_fragments loop entered"); 759 760 // get current data 761 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 762 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 763 bool more_fragments = false; 764 765 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 766 if (current_acl_data_packet_length > max_acl_data_packet_length){ 767 more_fragments = true; 768 current_acl_data_packet_length = max_acl_data_packet_length; 769 } 770 771 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 772 if (acl_header_pos > 0u){ 773 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 774 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 775 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 776 } 777 778 // update header len 779 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 780 781 // count packet 782 connection->num_packets_sent++; 783 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 784 785 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 786 if (more_fragments){ 787 // update start of next fragment to send 788 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 789 } else { 790 // done 791 hci_stack->acl_fragmentation_pos = 0; 792 hci_stack->acl_fragmentation_total_size = 0; 793 } 794 795 // send packet 796 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 797 const int size = current_acl_data_packet_length + 4; 798 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 799 hci_stack->acl_fragmentation_tx_active = 1; 800 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 801 if (err != 0){ 802 // no error from HCI Transport expected 803 status = ERROR_CODE_HARDWARE_FAILURE; 804 } 805 806 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 807 808 // done yet? 809 if (!more_fragments) break; 810 811 // can send more? 812 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 813 } 814 815 log_debug("hci_send_acl_packet_fragments loop over"); 816 817 // release buffer now for synchronous transport 818 if (hci_transport_synchronous()){ 819 hci_stack->acl_fragmentation_tx_active = 0; 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 } 823 824 return status; 825 } 826 827 // pre: caller has reserved the packet buffer 828 uint8_t hci_send_acl_packet_buffer(int size){ 829 btstack_assert(hci_stack->hci_packet_buffer_reserved); 830 831 uint8_t * packet = hci_stack->hci_packet_buffer; 832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 833 834 // check for free places on Bluetooth module 835 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 836 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 return BTSTACK_ACL_BUFFERS_FULL; 840 } 841 842 hci_connection_t *connection = hci_connection_for_handle( con_handle); 843 if (!connection) { 844 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 845 hci_release_packet_buffer(); 846 hci_emit_transport_packet_sent(); 847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 848 } 849 850 #ifdef ENABLE_CLASSIC 851 hci_connection_timestamp(connection); 852 #endif 853 854 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 855 856 // setup data 857 hci_stack->acl_fragmentation_total_size = size; 858 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 859 860 return hci_send_acl_packet_fragments(connection); 861 } 862 863 #ifdef ENABLE_CLASSIC 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_sco_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 870 // skip checks in loopback mode 871 if (!hci_stack->loopback_mode){ 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_sco_packet_now()) { 876 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 // track send packet in connection struct 883 hci_connection_t *connection = hci_connection_for_handle( con_handle); 884 if (!connection) { 885 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 889 } 890 891 if (hci_have_usb_transport()){ 892 // token used 893 hci_stack->sco_can_send_now = false; 894 } else { 895 if (hci_stack->synchronous_flow_control_enabled){ 896 connection->num_packets_sent++; 897 } else { 898 connection->sco_tx_ready--; 899 } 900 } 901 } 902 903 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 904 905 #ifdef HAVE_SCO_TRANSPORT 906 hci_stack->sco_transport->send_packet(packet, size); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 910 return 0; 911 #else 912 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 913 if (hci_transport_synchronous()){ 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 } 917 918 if (err != 0){ 919 return ERROR_CODE_HARDWARE_FAILURE; 920 } 921 return ERROR_CODE_SUCCESS; 922 #endif 923 } 924 #endif 925 926 static void acl_handler(uint8_t *packet, uint16_t size){ 927 928 // get info 929 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 930 hci_connection_t *conn = hci_connection_for_handle(con_handle); 931 uint8_t acl_flags = READ_ACL_FLAGS(packet); 932 uint16_t acl_length = READ_ACL_LENGTH(packet); 933 934 // ignore non-registered handle 935 if (!conn){ 936 log_error("acl_handler called with non-registered handle %u!" , con_handle); 937 return; 938 } 939 940 // assert packet is complete 941 if ((acl_length + 4u) != size){ 942 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 943 return; 944 } 945 946 #ifdef ENABLE_CLASSIC 947 // update idle timestamp 948 hci_connection_timestamp(conn); 949 #endif 950 951 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 952 hci_stack->host_completed_packets = 1; 953 conn->num_packets_completed++; 954 #endif 955 956 // handle different packet types 957 switch (acl_flags & 0x03u) { 958 959 case 0x01: // continuation fragment 960 961 // sanity checks 962 if (conn->acl_recombination_pos == 0u) { 963 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 964 return; 965 } 966 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 967 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 968 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 969 conn->acl_recombination_pos = 0; 970 return; 971 } 972 973 // append fragment payload (header already stored) 974 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 975 &packet[4], acl_length); 976 conn->acl_recombination_pos += acl_length; 977 978 // forward complete L2CAP packet if complete. 979 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 980 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 981 // reset recombination buffer 982 conn->acl_recombination_length = 0; 983 conn->acl_recombination_pos = 0; 984 } 985 break; 986 987 case 0x02: { // first fragment 988 989 // sanity check 990 if (conn->acl_recombination_pos) { 991 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 992 conn->acl_recombination_pos = 0; 993 } 994 995 // peek into L2CAP packet! 996 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 997 998 // compare fragment size to L2CAP packet size 999 if (acl_length >= (l2cap_length + 4u)){ 1000 // forward fragment as L2CAP packet 1001 hci_emit_acl_packet(packet, acl_length + 4u); 1002 } else { 1003 1004 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1005 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1006 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1007 return; 1008 } 1009 1010 // store first fragment and tweak acl length for complete package 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1012 packet, acl_length + 4u); 1013 conn->acl_recombination_pos = acl_length + 4u; 1014 conn->acl_recombination_length = l2cap_length; 1015 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1016 } 1017 break; 1018 1019 } 1020 default: 1021 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1022 return; 1023 } 1024 1025 // execute main loop 1026 hci_run(); 1027 } 1028 1029 static void hci_connection_stop_timer(hci_connection_t * conn){ 1030 btstack_run_loop_remove_timer(&conn->timeout); 1031 #ifdef ENABLE_CLASSIC 1032 btstack_run_loop_remove_timer(&conn->timeout_sco); 1033 #endif 1034 } 1035 1036 static void hci_shutdown_connection(hci_connection_t *conn){ 1037 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1038 1039 #ifdef ENABLE_CLASSIC 1040 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1041 bd_addr_type_t addr_type = conn->address_type; 1042 #endif 1043 #ifdef HAVE_SCO_TRANSPORT 1044 hci_con_handle_t con_handle = conn->con_handle; 1045 #endif 1046 #endif 1047 1048 hci_connection_stop_timer(conn); 1049 1050 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1051 btstack_memory_hci_connection_free( conn ); 1052 1053 // now it's gone 1054 hci_emit_nr_connections_changed(); 1055 1056 #ifdef ENABLE_CLASSIC 1057 #ifdef ENABLE_SCO_OVER_HCI 1058 // update SCO 1059 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1060 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1061 } 1062 #endif 1063 #ifdef HAVE_SCO_TRANSPORT 1064 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1065 hci_stack->sco_transport->close(con_handle); 1066 } 1067 #endif 1068 #endif 1069 } 1070 1071 #ifdef ENABLE_CLASSIC 1072 1073 static const uint16_t packet_type_sizes[] = { 1074 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1075 HCI_ACL_DH1_SIZE, 0, 0, 0, 1076 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1077 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1078 }; 1079 static const uint8_t packet_type_feature_requirement_bit[] = { 1080 0, // 3 slot packets 1081 1, // 5 slot packets 1082 25, // EDR 2 mpbs 1083 26, // EDR 3 mbps 1084 39, // 3 slot EDR packts 1085 40, // 5 slot EDR packet 1086 }; 1087 static const uint16_t packet_type_feature_packet_mask[] = { 1088 0x0f00, // 3 slot packets 1089 0xf000, // 5 slot packets 1090 0x1102, // EDR 2 mpbs 1091 0x2204, // EDR 3 mbps 1092 0x0300, // 3 slot EDR packts 1093 0x3000, // 5 slot EDR packet 1094 }; 1095 1096 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1097 // enable packet types based on size 1098 uint16_t packet_types = 0; 1099 unsigned int i; 1100 for (i=0;i<16;i++){ 1101 if (packet_type_sizes[i] == 0) continue; 1102 if (packet_type_sizes[i] <= buffer_size){ 1103 packet_types |= 1 << i; 1104 } 1105 } 1106 // disable packet types due to missing local supported features 1107 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1108 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1109 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1110 if (feature_set) continue; 1111 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1112 packet_types &= ~packet_type_feature_packet_mask[i]; 1113 } 1114 // flip bits for "may not be used" 1115 packet_types ^= 0x3306; 1116 return packet_types; 1117 } 1118 1119 uint16_t hci_usable_acl_packet_types(void){ 1120 return hci_stack->packet_types; 1121 } 1122 #endif 1123 1124 uint8_t* hci_get_outgoing_packet_buffer(void){ 1125 // hci packet buffer is >= acl data packet length 1126 return hci_stack->hci_packet_buffer; 1127 } 1128 1129 uint16_t hci_max_acl_data_packet_length(void){ 1130 return hci_stack->acl_data_packet_length; 1131 } 1132 1133 #ifdef ENABLE_CLASSIC 1134 bool hci_extended_sco_link_supported(void){ 1135 // No. 31, byte 3, bit 7 1136 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1137 } 1138 #endif 1139 1140 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1141 // No. 54, byte 6, bit 6 1142 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1143 } 1144 1145 #ifdef ENABLE_CLASSIC 1146 static int gap_ssp_supported(void){ 1147 // No. 51, byte 6, bit 3 1148 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1149 } 1150 #endif 1151 1152 static int hci_classic_supported(void){ 1153 #ifdef ENABLE_CLASSIC 1154 // No. 37, byte 4, bit 5, = No BR/EDR Support 1155 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1156 #else 1157 return 0; 1158 #endif 1159 } 1160 1161 static int hci_le_supported(void){ 1162 #ifdef ENABLE_BLE 1163 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1164 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1165 #else 1166 return 0; 1167 #endif 1168 } 1169 1170 #ifdef ENABLE_BLE 1171 1172 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1173 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1174 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1175 } else { 1176 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1177 } 1178 } 1179 1180 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1181 *addr_type = hci_stack->le_own_addr_type; 1182 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1183 } 1184 1185 #ifdef ENABLE_LE_PERIPHERAL 1186 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1187 *addr_type = hci_stack->le_advertisements_own_addr_type; 1188 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1189 }; 1190 #endif 1191 1192 #ifdef ENABLE_LE_CENTRAL 1193 1194 /** 1195 * @brief Get own addr type and address used for LE connections (Central) 1196 */ 1197 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1198 *addr_type = hci_stack->le_connection_own_addr_type; 1199 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1200 } 1201 1202 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1203 1204 int offset = 3; 1205 int num_reports = packet[offset]; 1206 offset += 1; 1207 1208 int i; 1209 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1210 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1211 for (i=0; (i<num_reports) && (offset < size);i++){ 1212 // sanity checks on data_length: 1213 uint8_t data_length = packet[offset + 8]; 1214 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1215 if ((offset + 9u + data_length + 1u) > size) return; 1216 // setup event 1217 uint8_t event_size = 10u + data_length; 1218 int pos = 0; 1219 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1220 event[pos++] = event_size; 1221 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1222 offset += 8; 1223 pos += 8; 1224 event[pos++] = packet[offset + 1 + data_length]; // rssi 1225 event[pos++] = data_length; 1226 offset++; 1227 (void)memcpy(&event[pos], &packet[offset], data_length); 1228 pos += data_length; 1229 offset += data_length + 1u; // rssi 1230 hci_emit_event(event, pos, 1); 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #ifdef ENABLE_BLE 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 static void hci_update_advertisements_enabled_for_current_roles(void){ 1239 if (hci_stack->le_advertisements_enabled){ 1240 // get number of active le slave connections 1241 int num_slave_connections = 0; 1242 btstack_linked_list_iterator_t it; 1243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1244 while (btstack_linked_list_iterator_has_next(&it)){ 1245 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1246 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1247 if (con->state != OPEN) continue; 1248 if (con->role != HCI_ROLE_SLAVE) continue; 1249 if (!hci_is_le_connection(con)) continue; 1250 num_slave_connections++; 1251 } 1252 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1253 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1254 } else { 1255 hci_stack->le_advertisements_enabled_for_current_roles = false; 1256 } 1257 } 1258 #endif 1259 #endif 1260 1261 #ifdef ENABLE_CLASSIC 1262 static void gap_run_set_local_name(void){ 1263 hci_reserve_packet_buffer(); 1264 uint8_t * packet = hci_stack->hci_packet_buffer; 1265 // construct HCI Command and send 1266 uint16_t opcode = hci_write_local_name.opcode; 1267 hci_stack->last_cmd_opcode = opcode; 1268 packet[0] = opcode & 0xff; 1269 packet[1] = opcode >> 8; 1270 packet[2] = DEVICE_NAME_LEN; 1271 memset(&packet[3], 0, DEVICE_NAME_LEN); 1272 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1273 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1274 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1275 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1276 // expand '00:00:00:00:00:00' in name with bd_addr 1277 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1278 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1279 } 1280 1281 static void gap_run_set_eir_data(void){ 1282 hci_reserve_packet_buffer(); 1283 uint8_t * packet = hci_stack->hci_packet_buffer; 1284 // construct HCI Command in-place and send 1285 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1286 hci_stack->last_cmd_opcode = opcode; 1287 uint16_t offset = 0; 1288 packet[offset++] = opcode & 0xff; 1289 packet[offset++] = opcode >> 8; 1290 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1291 packet[offset++] = 0; // FEC not required 1292 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1293 if (hci_stack->eir_data){ 1294 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1295 ad_context_t context; 1296 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1297 uint8_t data_type = ad_iterator_get_data_type(&context); 1298 uint8_t size = ad_iterator_get_data_len(&context); 1299 const uint8_t *data = ad_iterator_get_data(&context); 1300 // copy item 1301 packet[offset++] = size + 1; 1302 packet[offset++] = data_type; 1303 memcpy(&packet[offset], data, size); 1304 // update name item 1305 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1306 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1307 } 1308 offset += size; 1309 } 1310 } else { 1311 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1312 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1313 packet[offset++] = bytes_to_copy + 1; 1314 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1315 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1316 // expand '00:00:00:00:00:00' in name with bd_addr 1317 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1318 } 1319 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1320 } 1321 1322 static void hci_run_gap_tasks_classic(void){ 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1325 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1330 gap_run_set_local_name(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1335 gap_run_set_eir_data(); 1336 return; 1337 } 1338 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1339 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1340 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1341 return; 1342 } 1343 // write page scan activity 1344 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1345 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1346 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1347 return; 1348 } 1349 // write page scan type 1350 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1351 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1352 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1353 return; 1354 } 1355 // write page timeout 1356 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1357 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1358 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1359 return; 1360 } 1361 // send scan enable 1362 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1363 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1364 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1365 return; 1366 } 1367 // send write scan activity 1368 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1369 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1370 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1371 return; 1372 } 1373 } 1374 #endif 1375 1376 #ifndef HAVE_HOST_CONTROLLER_API 1377 1378 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1379 if (!hci_stack->config) return 0; 1380 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1381 // Limit baud rate for Broadcom chipsets to 3 mbps 1382 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1383 baud_rate = 3000000; 1384 } 1385 return baud_rate; 1386 } 1387 1388 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1389 UNUSED(ds); 1390 1391 switch (hci_stack->substate){ 1392 case HCI_INIT_W4_SEND_RESET: 1393 log_info("Resend HCI Reset"); 1394 hci_stack->substate = HCI_INIT_SEND_RESET; 1395 hci_stack->num_cmd_packets = 1; 1396 hci_run(); 1397 break; 1398 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1399 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1400 if (hci_stack->hci_transport->reset_link){ 1401 hci_stack->hci_transport->reset_link(); 1402 } 1403 1404 /* fall through */ 1405 1406 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1407 log_info("Resend HCI Reset - CSR Warm Boot"); 1408 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1409 hci_stack->num_cmd_packets = 1; 1410 hci_run(); 1411 break; 1412 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1413 if (hci_stack->hci_transport->set_baudrate){ 1414 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1415 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1416 hci_stack->hci_transport->set_baudrate(baud_rate); 1417 } 1418 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1419 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1420 if (hci_stack->hci_transport->reset_link){ 1421 log_info("Link Reset"); 1422 hci_stack->hci_transport->reset_link(); 1423 } 1424 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1425 hci_run(); 1426 } 1427 break; 1428 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1429 // otherwise continue 1430 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1431 hci_send_cmd(&hci_read_local_supported_commands); 1432 break; 1433 default: 1434 break; 1435 } 1436 } 1437 #endif 1438 1439 static void hci_initializing_next_state(void){ 1440 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1441 } 1442 1443 static void hci_init_done(void){ 1444 // done. tell the app 1445 log_info("hci_init_done -> HCI_STATE_WORKING"); 1446 hci_stack->state = HCI_STATE_WORKING; 1447 hci_emit_state(); 1448 } 1449 1450 // assumption: hci_can_send_command_packet_now() == true 1451 static void hci_initializing_run(void){ 1452 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1453 1454 if (!hci_can_send_command_packet_now()) return; 1455 1456 #ifndef HAVE_HOST_CONTROLLER_API 1457 bool need_baud_change = hci_stack->config 1458 && hci_stack->chipset 1459 && hci_stack->chipset->set_baudrate_command 1460 && hci_stack->hci_transport->set_baudrate 1461 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1462 #endif 1463 1464 switch (hci_stack->substate){ 1465 case HCI_INIT_SEND_RESET: 1466 hci_state_reset(); 1467 1468 #ifndef HAVE_HOST_CONTROLLER_API 1469 // prepare reset if command complete not received in 100ms 1470 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1471 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1472 btstack_run_loop_add_timer(&hci_stack->timeout); 1473 #endif 1474 // send command 1475 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1476 hci_send_cmd(&hci_reset); 1477 break; 1478 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1479 hci_send_cmd(&hci_read_local_version_information); 1480 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1481 break; 1482 1483 #ifndef HAVE_HOST_CONTROLLER_API 1484 case HCI_INIT_SEND_READ_LOCAL_NAME: 1485 hci_send_cmd(&hci_read_local_name); 1486 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1487 break; 1488 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1489 hci_state_reset(); 1490 // prepare reset if command complete not received in 100ms 1491 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1492 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1493 btstack_run_loop_add_timer(&hci_stack->timeout); 1494 // send command 1495 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1496 hci_send_cmd(&hci_reset); 1497 break; 1498 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1499 hci_state_reset(); 1500 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1501 hci_send_cmd(&hci_reset); 1502 break; 1503 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1504 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1505 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1506 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1507 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1508 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1509 break; 1510 } 1511 case HCI_INIT_SET_BD_ADDR: 1512 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1513 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1514 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1515 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1516 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1517 break; 1518 case HCI_INIT_SEND_BAUD_CHANGE: 1519 if (need_baud_change) { 1520 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1521 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1522 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1523 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1524 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1525 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1526 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1527 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1528 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1529 btstack_run_loop_add_timer(&hci_stack->timeout); 1530 } 1531 break; 1532 } 1533 1534 /* fall through */ 1535 1536 case HCI_INIT_CUSTOM_INIT: 1537 // Custom initialization 1538 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1539 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1540 bool send_cmd = false; 1541 switch (hci_stack->chipset_result){ 1542 case BTSTACK_CHIPSET_VALID_COMMAND: 1543 send_cmd = true; 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1545 break; 1546 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1547 send_cmd = true; 1548 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1549 log_info("CSR Warm Boot"); 1550 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1551 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1552 btstack_run_loop_add_timer(&hci_stack->timeout); 1553 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1554 && hci_stack->config 1555 && hci_stack->chipset 1556 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1557 && hci_stack->hci_transport->set_baudrate 1558 && hci_transport_uart_get_main_baud_rate()){ 1559 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1560 } else { 1561 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1562 } 1563 break; 1564 default: 1565 break; 1566 } 1567 1568 if (send_cmd){ 1569 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1570 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1571 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1572 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1573 break; 1574 } 1575 log_info("Init script done"); 1576 1577 // Init script download on Broadcom chipsets causes: 1578 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1579 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1580 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1581 1582 // - baud rate to reset, restore UART baud rate if needed 1583 if (need_baud_change) { 1584 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1585 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1586 hci_stack->hci_transport->set_baudrate(baud_rate); 1587 } 1588 1589 uint16_t bcm_delay_ms = 300; 1590 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1591 // -> Work around: wait here. 1592 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1593 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1594 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1595 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1596 btstack_run_loop_add_timer(&hci_stack->timeout); 1597 break; 1598 } 1599 } 1600 #endif 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1605 hci_send_cmd(&hci_read_local_supported_commands); 1606 break; 1607 case HCI_INIT_READ_BD_ADDR: 1608 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1609 hci_send_cmd(&hci_read_bd_addr); 1610 break; 1611 case HCI_INIT_READ_BUFFER_SIZE: 1612 // only read buffer size if supported 1613 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1614 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1615 hci_send_cmd(&hci_read_buffer_size); 1616 break; 1617 } 1618 1619 /* fall through */ 1620 1621 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1622 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1623 hci_send_cmd(&hci_read_local_supported_features); 1624 break; 1625 1626 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1627 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1628 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1629 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1630 break; 1631 case HCI_INIT_HOST_BUFFER_SIZE: 1632 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1633 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1634 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1635 break; 1636 #endif 1637 1638 case HCI_INIT_SET_EVENT_MASK: 1639 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1640 if (hci_le_supported()){ 1641 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1642 } else { 1643 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1644 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1645 } 1646 break; 1647 1648 #ifdef ENABLE_CLASSIC 1649 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1650 if (hci_classic_supported() && gap_ssp_supported()){ 1651 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1652 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1653 break; 1654 } 1655 1656 /* fall through */ 1657 1658 case HCI_INIT_WRITE_INQUIRY_MODE: 1659 if (hci_classic_supported()){ 1660 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1661 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1662 break; 1663 } 1664 1665 /* fall through */ 1666 1667 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1668 // skip write secure connections host support if not supported or disabled 1669 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1670 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1671 hci_stack->secure_connections_active = true; 1672 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1673 break; 1674 } 1675 1676 #ifdef ENABLE_SCO_OVER_HCI 1677 /* fall through */ 1678 1679 // only sent if ENABLE_SCO_OVER_HCI is defined 1680 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1681 // skip write synchronous flow control if not supported 1682 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1683 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1684 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1685 break; 1686 } 1687 /* fall through */ 1688 1689 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1690 // skip write default erroneous data reporting if not supported 1691 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1692 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1693 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1694 break; 1695 } 1696 #endif 1697 1698 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1699 /* fall through */ 1700 1701 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1702 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1703 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1704 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1705 #ifdef ENABLE_SCO_OVER_HCI 1706 log_info("BCM: Route SCO data via HCI transport"); 1707 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1708 #endif 1709 #ifdef ENABLE_SCO_OVER_PCM 1710 log_info("BCM: Route SCO data via PCM interface"); 1711 #ifdef ENABLE_BCM_PCM_WBS 1712 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1713 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1714 #else 1715 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1716 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1717 #endif 1718 #endif 1719 break; 1720 } 1721 #endif 1722 1723 #ifdef ENABLE_SCO_OVER_PCM 1724 /* fall through */ 1725 1726 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1727 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1728 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1729 log_info("BCM: Config PCM interface for I2S"); 1730 #ifdef ENABLE_BCM_PCM_WBS 1731 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1732 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1733 #else 1734 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1735 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1736 #endif 1737 break; 1738 } 1739 #endif 1740 #endif 1741 1742 #ifdef ENABLE_BLE 1743 /* fall through */ 1744 1745 // LE INIT 1746 case HCI_INIT_LE_READ_BUFFER_SIZE: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1749 hci_send_cmd(&hci_le_read_buffer_size); 1750 break; 1751 } 1752 1753 /* fall through */ 1754 1755 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1756 // skip write le host if not supported (e.g. on LE only EM9301) 1757 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1758 // LE Supported Host = 1, Simultaneous Host = 0 1759 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1760 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1761 break; 1762 } 1763 1764 /* fall through */ 1765 1766 case HCI_INIT_LE_SET_EVENT_MASK: 1767 if (hci_le_supported()){ 1768 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1769 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1770 break; 1771 } 1772 #endif 1773 1774 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1775 /* fall through */ 1776 1777 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1778 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1779 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1780 hci_send_cmd(&hci_le_read_maximum_data_length); 1781 break; 1782 } 1783 1784 /* fall through */ 1785 1786 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1787 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1788 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1789 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1790 break; 1791 } 1792 #endif 1793 1794 #ifdef ENABLE_LE_CENTRAL 1795 /* fall through */ 1796 1797 case HCI_INIT_READ_WHITE_LIST_SIZE: 1798 if (hci_le_supported()){ 1799 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1800 hci_send_cmd(&hci_le_read_white_list_size); 1801 break; 1802 } 1803 1804 /* fall through */ 1805 1806 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1807 if (hci_le_supported()){ 1808 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1809 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); 1810 break; 1811 } 1812 #endif 1813 1814 /* fall through */ 1815 1816 case HCI_INIT_DONE: 1817 hci_stack->substate = HCI_INIT_DONE; 1818 #ifdef ENABLE_CLASSIC 1819 // init sequence complete, check if GAP Tasks are completed 1820 if (hci_stack->gap_tasks != 0) { 1821 hci_run_gap_tasks_classic(); 1822 break; 1823 } 1824 #endif 1825 hci_init_done(); 1826 break; 1827 1828 default: 1829 return; 1830 } 1831 } 1832 1833 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1834 bool command_completed = false; 1835 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1836 uint16_t opcode = little_endian_read_16(packet,3); 1837 if (opcode == hci_stack->last_cmd_opcode){ 1838 command_completed = true; 1839 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1840 } else { 1841 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1842 } 1843 } 1844 1845 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1846 uint8_t status = packet[2]; 1847 uint16_t opcode = little_endian_read_16(packet,4); 1848 if (opcode == hci_stack->last_cmd_opcode){ 1849 if (status){ 1850 command_completed = true; 1851 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1852 } else { 1853 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1854 } 1855 } else { 1856 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1857 } 1858 } 1859 #ifndef HAVE_HOST_CONTROLLER_API 1860 // Vendor == CSR 1861 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1862 // TODO: track actual command 1863 command_completed = true; 1864 } 1865 1866 // Vendor == Toshiba 1867 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1868 // TODO: track actual command 1869 command_completed = true; 1870 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1871 hci_stack->num_cmd_packets = 1; 1872 } 1873 #endif 1874 1875 return command_completed; 1876 } 1877 1878 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1879 1880 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1881 1882 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1883 1884 #ifndef HAVE_HOST_CONTROLLER_API 1885 1886 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1887 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1888 // 1889 // HCI Reset 1890 // Timeout 100 ms 1891 // HCI Reset 1892 // Command Complete Reset 1893 // HCI Read Local Version Information 1894 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1895 // hang... 1896 // 1897 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1898 if (!command_completed 1899 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1900 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1901 1902 uint16_t opcode = little_endian_read_16(packet,3); 1903 if (opcode == hci_reset.opcode){ 1904 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1905 return; 1906 } 1907 } 1908 1909 // CSR & H5 1910 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1911 if (!command_completed 1912 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1913 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1914 1915 uint16_t opcode = little_endian_read_16(packet,3); 1916 if (opcode == hci_reset.opcode){ 1917 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1918 return; 1919 } 1920 } 1921 1922 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1923 // fix: Correct substate and behave as command below 1924 if (command_completed){ 1925 switch (hci_stack->substate){ 1926 case HCI_INIT_SEND_RESET: 1927 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1928 break; 1929 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1930 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1931 break; 1932 default: 1933 break; 1934 } 1935 } 1936 1937 #endif 1938 1939 if (!command_completed) return; 1940 1941 bool need_baud_change = false; 1942 bool need_addr_change = false; 1943 1944 #ifndef HAVE_HOST_CONTROLLER_API 1945 need_baud_change = hci_stack->config 1946 && hci_stack->chipset 1947 && hci_stack->chipset->set_baudrate_command 1948 && hci_stack->hci_transport->set_baudrate 1949 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1950 1951 need_addr_change = hci_stack->custom_bd_addr_set 1952 && hci_stack->chipset 1953 && hci_stack->chipset->set_bd_addr_command; 1954 #endif 1955 1956 switch(hci_stack->substate){ 1957 1958 #ifndef HAVE_HOST_CONTROLLER_API 1959 case HCI_INIT_SEND_RESET: 1960 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1961 // fix: just correct substate and behave as command below 1962 1963 /* fall through */ 1964 #endif 1965 1966 case HCI_INIT_W4_SEND_RESET: 1967 btstack_run_loop_remove_timer(&hci_stack->timeout); 1968 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1969 return; 1970 1971 #ifndef HAVE_HOST_CONTROLLER_API 1972 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1973 // for STLC2500D, baud rate change already happened. 1974 // for others, baud rate gets changed now 1975 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1976 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1977 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1978 hci_stack->hci_transport->set_baudrate(baud_rate); 1979 } 1980 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1981 return; 1982 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1983 btstack_run_loop_remove_timer(&hci_stack->timeout); 1984 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1985 return; 1986 case HCI_INIT_W4_CUSTOM_INIT: 1987 // repeat custom init 1988 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1989 return; 1990 #endif 1991 1992 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1993 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1994 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1995 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1996 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1997 return; 1998 } 1999 if (need_addr_change){ 2000 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2001 return; 2002 } 2003 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2004 return; 2005 #ifndef HAVE_HOST_CONTROLLER_API 2006 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2007 if (need_baud_change){ 2008 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2009 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2010 hci_stack->hci_transport->set_baudrate(baud_rate); 2011 } 2012 if (need_addr_change){ 2013 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2014 return; 2015 } 2016 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2017 return; 2018 case HCI_INIT_W4_SET_BD_ADDR: 2019 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2020 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2021 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2022 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2023 return; 2024 } 2025 // skipping st warm boot 2026 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2027 return; 2028 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2029 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2030 return; 2031 #endif 2032 2033 case HCI_INIT_DONE: 2034 // set state if we came here by fall through 2035 hci_stack->substate = HCI_INIT_DONE; 2036 return; 2037 2038 default: 2039 break; 2040 } 2041 hci_initializing_next_state(); 2042 } 2043 2044 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2045 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2046 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2047 // check if the hci connection has been outgoing 2048 if (conn->state != SENT_CREATE_CONNECTION) return; 2049 2050 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2051 bd_addr_t bd_address; 2052 (void)memcpy(&bd_address, conn->address, 6); 2053 2054 #ifdef ENABLE_CLASSIC 2055 // cache needed data 2056 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2057 #endif 2058 2059 // connection failed, remove entry 2060 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2061 btstack_memory_hci_connection_free( conn ); 2062 2063 #ifdef ENABLE_CLASSIC 2064 // notify client if dedicated bonding 2065 if (notify_dedicated_bonding_failed){ 2066 log_info("hci notify_dedicated_bonding_failed"); 2067 hci_emit_dedicated_bonding_result(bd_address, status); 2068 } 2069 2070 // if authentication error, also delete link key 2071 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2072 gap_drop_link_key_for_bd_addr(bd_address); 2073 } 2074 #else 2075 UNUSED(status); 2076 #endif 2077 } 2078 2079 #ifdef ENABLE_CLASSIC 2080 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2081 // SSP Controller 2082 if (features[6] & (1 << 3)){ 2083 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2084 } 2085 // eSCO 2086 if (features[3] & (1<<7)){ 2087 conn->remote_supported_features[0] |= 1; 2088 } 2089 // Extended features 2090 if (features[7] & (1<<7)){ 2091 conn->remote_supported_features[0] |= 2; 2092 } 2093 } 2094 2095 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2096 // SSP Host 2097 if (features[0] & (1 << 0)){ 2098 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2099 } 2100 // SC Host 2101 if (features[0] & (1 << 3)){ 2102 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2103 } 2104 } 2105 2106 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2107 // SC Controller 2108 if (features[1] & (1 << 0)){ 2109 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2110 } 2111 } 2112 2113 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2114 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2115 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2116 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2117 if (conn->bonding_flags & BONDING_DEDICATED){ 2118 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2119 } 2120 } 2121 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2122 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2123 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2124 } 2125 2126 #endif 2127 2128 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2129 // handle BT initialization 2130 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2131 hci_initializing_event_handler(packet, size); 2132 } 2133 2134 // help with BT sleep 2135 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2136 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2137 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2138 hci_initializing_next_state(); 2139 } 2140 } 2141 2142 #ifdef ENABLE_CLASSIC 2143 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2144 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2145 conn->encryption_key_size = encryption_key_size; 2146 2147 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2148 conn->requested_security_level = LEVEL_0; 2149 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2150 return; 2151 } 2152 2153 // Request remote features if not already done 2154 hci_trigger_remote_features_for_connection(conn); 2155 2156 // Request Authentication if not already done 2157 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2158 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2159 } 2160 #endif 2161 2162 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2163 UNUSED(size); 2164 2165 uint16_t manufacturer; 2166 #ifdef ENABLE_CLASSIC 2167 hci_con_handle_t handle; 2168 hci_connection_t * conn; 2169 uint8_t status; 2170 #endif 2171 // get num cmd packets - limit to 1 to reduce complexity 2172 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2173 2174 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2175 switch (opcode){ 2176 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2177 if (packet[5]) break; 2178 // terminate, name 248 chars 2179 packet[6+248] = 0; 2180 log_info("local name: %s", &packet[6]); 2181 break; 2182 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2183 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2184 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2185 uint16_t acl_len = little_endian_read_16(packet, 6); 2186 uint16_t sco_len = packet[8]; 2187 2188 // determine usable ACL/SCO payload size 2189 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2190 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2191 2192 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2193 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2194 2195 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2196 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2197 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2198 } 2199 break; 2200 case HCI_OPCODE_HCI_READ_RSSI: 2201 if (packet[5] == ERROR_CODE_SUCCESS){ 2202 uint8_t event[5]; 2203 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2204 event[1] = 3; 2205 (void)memcpy(&event[2], &packet[6], 3); 2206 hci_emit_event(event, sizeof(event), 1); 2207 } 2208 break; 2209 #ifdef ENABLE_BLE 2210 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2211 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2212 hci_stack->le_acl_packets_total_num = packet[8]; 2213 // determine usable ACL payload size 2214 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2215 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2216 } 2217 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2218 break; 2219 #endif 2220 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2221 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2222 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2223 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2224 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); 2225 break; 2226 #endif 2227 #ifdef ENABLE_LE_CENTRAL 2228 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2229 hci_stack->le_whitelist_capacity = packet[6]; 2230 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2231 break; 2232 #endif 2233 case HCI_OPCODE_HCI_READ_BD_ADDR: 2234 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2235 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)); 2236 #ifdef ENABLE_CLASSIC 2237 if (hci_stack->link_key_db){ 2238 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2239 } 2240 #endif 2241 break; 2242 #ifdef ENABLE_CLASSIC 2243 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2244 hci_emit_discoverable_enabled(hci_stack->discoverable); 2245 break; 2246 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2247 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2248 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2249 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2250 hci_emit_event(event, sizeof(event), 1); 2251 } 2252 break; 2253 #endif 2254 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2255 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2256 2257 #ifdef ENABLE_CLASSIC 2258 // determine usable ACL packet types based on host buffer size and supported features 2259 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2260 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2261 #endif 2262 // Classic/LE 2263 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2264 break; 2265 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2266 manufacturer = little_endian_read_16(packet, 10); 2267 // map Cypress to Broadcom 2268 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2269 log_info("Treat Cypress as Broadcom"); 2270 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2271 little_endian_store_16(packet, 10, manufacturer); 2272 } 2273 hci_stack->manufacturer = manufacturer; 2274 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2275 break; 2276 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2277 hci_stack->local_supported_commands[0] = 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2283 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2284 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2285 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2286 hci_stack->local_supported_commands[1] = 2287 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2288 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2289 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2290 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2292 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2293 break; 2294 #ifdef ENABLE_CLASSIC 2295 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2296 if (packet[5]) return; 2297 hci_stack->synchronous_flow_control_enabled = 1; 2298 break; 2299 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2300 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2301 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2302 conn = hci_connection_for_handle(handle); 2303 if (conn != NULL) { 2304 uint8_t key_size = 0; 2305 if (status == 0){ 2306 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2307 log_info("Handle %04x key Size: %u", handle, key_size); 2308 } else { 2309 key_size = 1; 2310 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2311 } 2312 hci_handle_read_encryption_key_size_complete(conn, key_size); 2313 } 2314 break; 2315 // assert pairing complete event is emitted. 2316 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2317 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2318 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2319 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2320 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2321 // lookup connection by gap pairing addr 2322 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2323 if (conn == NULL) break; 2324 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2325 break; 2326 2327 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2328 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2329 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2330 uint8_t event[67]; 2331 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2332 event[1] = 65; 2333 (void)memset(&event[2], 0, 65); 2334 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2335 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2336 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2337 event[2] = 3; 2338 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2339 } else { 2340 event[2] = 1; 2341 } 2342 } 2343 hci_emit_event(event, sizeof(event), 0); 2344 break; 2345 } 2346 2347 // note: only needed if user does not provide OOB data 2348 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2349 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2350 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2351 if (conn == NULL) break; 2352 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2353 break; 2354 #endif 2355 #endif 2356 default: 2357 break; 2358 } 2359 } 2360 2361 #ifdef ENABLE_BLE 2362 static void event_handle_le_connection_complete(const uint8_t * packet){ 2363 bd_addr_t addr; 2364 bd_addr_type_t addr_type; 2365 hci_connection_t * conn; 2366 2367 // Connection management 2368 reverse_bd_addr(&packet[8], addr); 2369 addr_type = (bd_addr_type_t)packet[7]; 2370 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2371 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2372 2373 #ifdef ENABLE_LE_CENTRAL 2374 // handle error: error is reported only to the initiator -> outgoing connection 2375 if (packet[3]){ 2376 2377 // handle cancelled outgoing connection 2378 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2379 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2380 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2381 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2382 // reset state 2383 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2384 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2385 // get outgoing connection conn struct for direct connect 2386 conn = gap_get_outgoing_connection(); 2387 } 2388 2389 // outgoing le connection establishment is done 2390 if (conn){ 2391 // remove entry 2392 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2393 btstack_memory_hci_connection_free( conn ); 2394 } 2395 return; 2396 } 2397 #endif 2398 2399 // on success, both hosts receive connection complete event 2400 if (packet[6] == HCI_ROLE_MASTER){ 2401 #ifdef ENABLE_LE_CENTRAL 2402 // if we're master on an le connection, it was an outgoing connection and we're done with it 2403 // note: no hci_connection_t object exists yet for connect with whitelist 2404 if (hci_is_le_connection_type(addr_type)){ 2405 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2406 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2407 } 2408 #endif 2409 } else { 2410 #ifdef ENABLE_LE_PERIPHERAL 2411 // if we're slave, it was an incoming connection, advertisements have stopped 2412 hci_stack->le_advertisements_active = false; 2413 #endif 2414 } 2415 2416 // LE connections are auto-accepted, so just create a connection if there isn't one already 2417 if (!conn){ 2418 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2419 } 2420 2421 // no memory, sorry. 2422 if (!conn){ 2423 return; 2424 } 2425 2426 conn->state = OPEN; 2427 conn->role = packet[6]; 2428 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2429 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2430 2431 #ifdef ENABLE_LE_PERIPHERAL 2432 if (packet[6] == HCI_ROLE_SLAVE){ 2433 hci_update_advertisements_enabled_for_current_roles(); 2434 } 2435 #endif 2436 2437 // init unenhanced att bearer mtu 2438 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2439 conn->att_connection.mtu_exchanged = false; 2440 2441 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2442 2443 // restart timer 2444 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2445 // btstack_run_loop_add_timer(&conn->timeout); 2446 2447 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2448 2449 hci_emit_nr_connections_changed(); 2450 } 2451 #endif 2452 2453 #ifdef ENABLE_CLASSIC 2454 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){ 2455 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2456 // LEVEL_4 is tested by l2cap 2457 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2458 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2459 if (level >= LEVEL_3){ 2460 // MITM not possible without keyboard or display 2461 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2462 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2463 2464 // MITM possible if one side has keyboard and the other has keyboard or display 2465 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2466 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2467 2468 // MITM not possible if one side has only display and other side has no keyboard 2469 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2470 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2471 } 2472 // LEVEL 2 requires SSP, which is a given 2473 return true; 2474 } 2475 2476 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2477 uint16_t i; 2478 for (i=0; i < size ; i++){ 2479 if (data[i] != 0) { 2480 return false; 2481 } 2482 } 2483 return true; 2484 } 2485 2486 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2487 // get requested security level 2488 gap_security_level_t requested_security_level = conn->requested_security_level; 2489 if (hci_stack->gap_secure_connections_only_mode){ 2490 requested_security_level = LEVEL_4; 2491 } 2492 2493 // assess security: LEVEL 4 requires SC 2494 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2495 if ((requested_security_level == LEVEL_4) && 2496 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2497 !hci_remote_sc_enabled(conn)){ 2498 log_info("Level 4 required, but SC not supported -> abort"); 2499 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2500 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2501 return; 2502 } 2503 2504 // assess security based on io capabilities 2505 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2506 // responder: fully validate io caps of both sides as well as OOB data 2507 bool security_possible = false; 2508 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2509 2510 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2511 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2512 // so we merge the OOB data availability 2513 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2514 if (conn->classic_oob_c_192 != NULL){ 2515 have_oob_data |= 1; 2516 } 2517 if (conn->classic_oob_c_256 != NULL){ 2518 have_oob_data |= 2; 2519 } 2520 // for up to Level 3, either P-192 as well as P-256 will do 2521 // 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 2522 // if remote does not SC, we should not receive P-256 data either 2523 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2524 security_possible = true; 2525 } 2526 // for Level 4, P-256 is needed 2527 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2528 security_possible = true; 2529 } 2530 #endif 2531 2532 if (security_possible == false){ 2533 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2534 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2535 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2536 return; 2537 } 2538 } else { 2539 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2540 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2541 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2542 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2543 log_info("Level 3+ required, but no input/output -> abort"); 2544 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2545 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2546 return; 2547 } 2548 #endif 2549 #endif 2550 } 2551 2552 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2553 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2554 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2555 } else { 2556 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2557 } 2558 #endif 2559 } 2560 2561 #endif 2562 2563 static void event_handler(uint8_t *packet, uint16_t size){ 2564 2565 uint16_t event_length = packet[1]; 2566 2567 // assert packet is complete 2568 if (size != (event_length + 2u)){ 2569 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2570 return; 2571 } 2572 2573 bd_addr_type_t addr_type; 2574 hci_con_handle_t handle; 2575 hci_connection_t * conn; 2576 int i; 2577 int create_connection_cmd; 2578 2579 #ifdef ENABLE_CLASSIC 2580 hci_link_type_t link_type; 2581 bd_addr_t addr; 2582 #endif 2583 2584 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2585 2586 switch (hci_event_packet_get_type(packet)) { 2587 2588 case HCI_EVENT_COMMAND_COMPLETE: 2589 handle_command_complete_event(packet, size); 2590 break; 2591 2592 case HCI_EVENT_COMMAND_STATUS: 2593 // get num cmd packets - limit to 1 to reduce complexity 2594 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2595 2596 // check command status to detected failed outgoing connections 2597 create_connection_cmd = 0; 2598 #ifdef ENABLE_CLASSIC 2599 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2600 create_connection_cmd = 1; 2601 } 2602 #endif 2603 #ifdef ENABLE_LE_CENTRAL 2604 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2605 create_connection_cmd = 1; 2606 } 2607 #endif 2608 if (create_connection_cmd) { 2609 uint8_t status = hci_event_command_status_get_status(packet); 2610 addr_type = hci_stack->outgoing_addr_type; 2611 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2612 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); 2613 2614 // reset outgoing address info 2615 memset(hci_stack->outgoing_addr, 0, 6); 2616 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2617 2618 // on error 2619 if (status != ERROR_CODE_SUCCESS){ 2620 #ifdef ENABLE_LE_CENTRAL 2621 if (hci_is_le_connection_type(addr_type)){ 2622 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2623 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2624 } 2625 #endif 2626 // error => outgoing connection failed 2627 if (conn != NULL){ 2628 hci_handle_connection_failed(conn, status); 2629 } 2630 } 2631 } 2632 2633 #ifdef ENABLE_CLASSIC 2634 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2635 uint8_t status = hci_event_command_status_get_status(packet); 2636 log_info("command status (inquiry), status %x", status); 2637 if (status == ERROR_CODE_SUCCESS) { 2638 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2639 } else { 2640 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2641 } 2642 } 2643 #endif 2644 break; 2645 2646 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2647 if (size < 3) return; 2648 uint16_t num_handles = packet[2]; 2649 if (size != (3u + num_handles * 4u)) return; 2650 uint16_t offset = 3; 2651 for (i=0; i<num_handles;i++){ 2652 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2653 offset += 2u; 2654 uint16_t num_packets = little_endian_read_16(packet, offset); 2655 offset += 2u; 2656 2657 conn = hci_connection_for_handle(handle); 2658 if (!conn){ 2659 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2660 continue; 2661 } 2662 2663 if (conn->num_packets_sent >= num_packets){ 2664 conn->num_packets_sent -= num_packets; 2665 } else { 2666 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2667 conn->num_packets_sent = 0; 2668 } 2669 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2670 2671 #ifdef ENABLE_CLASSIC 2672 // For SCO, we do the can_send_now_check here 2673 hci_notify_if_sco_can_send_now(); 2674 #endif 2675 } 2676 break; 2677 } 2678 2679 #ifdef ENABLE_CLASSIC 2680 case HCI_EVENT_INQUIRY_COMPLETE: 2681 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2682 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2683 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2684 hci_emit_event(event, sizeof(event), 1); 2685 } 2686 break; 2687 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2688 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2689 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2690 } 2691 break; 2692 case HCI_EVENT_CONNECTION_REQUEST: 2693 reverse_bd_addr(&packet[2], addr); 2694 link_type = (hci_link_type_t) packet[11]; 2695 2696 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2697 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2698 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2699 bd_addr_copy(hci_stack->decline_addr, addr); 2700 break; 2701 } 2702 2703 if (hci_stack->gap_classic_accept_callback != NULL){ 2704 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2705 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2706 bd_addr_copy(hci_stack->decline_addr, addr); 2707 break; 2708 } 2709 } 2710 2711 // TODO: eval COD 8-10 2712 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2713 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2714 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2715 if (!conn) { 2716 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2717 } 2718 if (!conn) { 2719 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2720 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2721 bd_addr_copy(hci_stack->decline_addr, addr); 2722 hci_run(); 2723 // avoid event to higher layer 2724 return; 2725 } 2726 conn->role = HCI_ROLE_SLAVE; 2727 conn->state = RECEIVED_CONNECTION_REQUEST; 2728 // store info about eSCO 2729 if (link_type == HCI_LINK_TYPE_ESCO){ 2730 conn->remote_supported_features[0] |= 1; 2731 } 2732 hci_run(); 2733 break; 2734 2735 case HCI_EVENT_CONNECTION_COMPLETE: 2736 // Connection management 2737 reverse_bd_addr(&packet[5], addr); 2738 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2739 addr_type = BD_ADDR_TYPE_ACL; 2740 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2741 if (conn) { 2742 if (!packet[2]){ 2743 conn->state = OPEN; 2744 conn->con_handle = little_endian_read_16(packet, 3); 2745 2746 // queue set supervision timeout if we're master 2747 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2748 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2749 } 2750 2751 // restart timer 2752 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2753 btstack_run_loop_add_timer(&conn->timeout); 2754 2755 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2756 2757 hci_emit_nr_connections_changed(); 2758 } else { 2759 // connection failed 2760 hci_handle_connection_failed(conn, packet[2]); 2761 } 2762 } 2763 break; 2764 2765 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2766 reverse_bd_addr(&packet[5], addr); 2767 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2768 if (packet[2]){ 2769 // connection failed 2770 break; 2771 } 2772 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2773 if (!conn) { 2774 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2775 } 2776 if (!conn) { 2777 break; 2778 } 2779 conn->state = OPEN; 2780 conn->con_handle = little_endian_read_16(packet, 3); 2781 2782 #ifdef ENABLE_SCO_OVER_HCI 2783 // update SCO 2784 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2785 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2786 } 2787 // trigger can send now 2788 if (hci_have_usb_transport()){ 2789 hci_stack->sco_can_send_now = true; 2790 } 2791 #endif 2792 #ifdef HAVE_SCO_TRANSPORT 2793 // configure sco transport 2794 if (hci_stack->sco_transport != NULL){ 2795 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2796 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2797 } 2798 #endif 2799 break; 2800 2801 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2802 handle = little_endian_read_16(packet, 3); 2803 conn = hci_connection_for_handle(handle); 2804 if (!conn) break; 2805 if (!packet[2]){ 2806 const uint8_t * features = &packet[5]; 2807 hci_handle_remote_features_page_0(conn, features); 2808 2809 // read extended features if possible 2810 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2811 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2812 break; 2813 } 2814 } 2815 hci_handle_remote_features_received(conn); 2816 break; 2817 2818 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2819 handle = little_endian_read_16(packet, 3); 2820 conn = hci_connection_for_handle(handle); 2821 if (!conn) break; 2822 // status = ok, page = 1 2823 if (!packet[2]) { 2824 uint8_t page_number = packet[5]; 2825 uint8_t maximum_page_number = packet[6]; 2826 const uint8_t * features = &packet[7]; 2827 bool done = false; 2828 switch (page_number){ 2829 case 1: 2830 hci_handle_remote_features_page_1(conn, features); 2831 if (maximum_page_number >= 2){ 2832 // get Secure Connections (Controller) from Page 2 if available 2833 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2834 } else { 2835 // otherwise, assume SC (Controller) == SC (Host) 2836 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2837 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2838 } 2839 done = true; 2840 } 2841 break; 2842 case 2: 2843 hci_handle_remote_features_page_2(conn, features); 2844 done = true; 2845 break; 2846 default: 2847 break; 2848 } 2849 if (!done) break; 2850 } 2851 hci_handle_remote_features_received(conn); 2852 break; 2853 2854 case HCI_EVENT_LINK_KEY_REQUEST: 2855 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2856 hci_event_link_key_request_get_bd_addr(packet, addr); 2857 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2858 if (!conn) break; 2859 2860 // lookup link key in db if not cached 2861 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2862 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2863 } 2864 2865 // response sent by hci_run() 2866 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2867 #endif 2868 break; 2869 2870 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2871 hci_event_link_key_request_get_bd_addr(packet, addr); 2872 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2873 if (!conn) break; 2874 2875 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2876 2877 // CVE-2020-26555: ignore NULL link key 2878 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2879 if (btstack_is_null(&packet[8], 16)) break; 2880 2881 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2882 // Change Connection Encryption keeps link key type 2883 if (link_key_type != CHANGED_COMBINATION_KEY){ 2884 conn->link_key_type = link_key_type; 2885 } 2886 2887 // cache link key. link keys stored in little-endian format for legacy reasons 2888 memcpy(&conn->link_key, &packet[8], 16); 2889 2890 // only store link key: 2891 // - if bondable enabled 2892 if (hci_stack->bondable == false) break; 2893 // - if security level sufficient 2894 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2895 // - for SSP, also check if remote side requested bonding as well 2896 if (conn->link_key_type != COMBINATION_KEY){ 2897 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2898 if (!remote_bonding){ 2899 break; 2900 } 2901 } 2902 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2903 break; 2904 } 2905 2906 case HCI_EVENT_PIN_CODE_REQUEST: 2907 hci_event_pin_code_request_get_bd_addr(packet, addr); 2908 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2909 if (!conn) break; 2910 2911 hci_pairing_started(conn, false); 2912 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2913 if (!hci_stack->bondable ){ 2914 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2915 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2916 hci_run(); 2917 return; 2918 } 2919 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2920 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2921 log_info("Level 4 required, but SC not supported -> abort"); 2922 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2923 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2924 hci_run(); 2925 return; 2926 } 2927 break; 2928 2929 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2930 hci_event_io_capability_response_get_bd_addr(packet, addr); 2931 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2932 if (!conn) break; 2933 2934 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2935 hci_pairing_started(conn, true); 2936 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2937 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2938 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2939 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2940 #endif 2941 break; 2942 2943 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2944 hci_event_io_capability_response_get_bd_addr(packet, addr); 2945 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2946 if (!conn) break; 2947 2948 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2949 hci_connection_timestamp(conn); 2950 hci_pairing_started(conn, true); 2951 break; 2952 2953 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2954 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2955 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2956 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2957 if (!conn) break; 2958 2959 hci_connection_timestamp(conn); 2960 2961 hci_pairing_started(conn, true); 2962 2963 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2964 break; 2965 #endif 2966 2967 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2968 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2969 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2970 if (!conn) break; 2971 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2972 if (hci_stack->ssp_auto_accept){ 2973 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2974 }; 2975 } else { 2976 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2977 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2978 // don't forward event to app 2979 hci_run(); 2980 return; 2981 } 2982 break; 2983 2984 case HCI_EVENT_USER_PASSKEY_REQUEST: 2985 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2986 if (hci_stack->ssp_auto_accept){ 2987 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2988 }; 2989 break; 2990 2991 case HCI_EVENT_MODE_CHANGE: 2992 handle = hci_event_mode_change_get_handle(packet); 2993 conn = hci_connection_for_handle(handle); 2994 if (!conn) break; 2995 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2996 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2997 break; 2998 #endif 2999 3000 case HCI_EVENT_ENCRYPTION_CHANGE: 3001 handle = hci_event_encryption_change_get_connection_handle(packet); 3002 conn = hci_connection_for_handle(handle); 3003 if (!conn) break; 3004 if (hci_event_encryption_change_get_status(packet) == 0u) { 3005 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3006 if (encryption_enabled){ 3007 if (hci_is_le_connection(conn)){ 3008 // For LE, we accept connection as encrypted 3009 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3010 } 3011 #ifdef ENABLE_CLASSIC 3012 else { 3013 3014 // dedicated bonding: send result and disconnect 3015 if (conn->bonding_flags & BONDING_DEDICATED){ 3016 conn->bonding_flags &= ~BONDING_DEDICATED; 3017 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3018 conn->bonding_status = packet[2]; 3019 break; 3020 } 3021 3022 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3023 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3024 bool connected_uses_aes_ccm = encryption_enabled == 2; 3025 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3026 log_info("SC during pairing, but only E0 now -> abort"); 3027 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3028 break; 3029 } 3030 3031 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3032 if (connected_uses_aes_ccm){ 3033 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3034 } 3035 3036 #ifdef ENABLE_TESTING_SUPPORT 3037 // work around for issue with PTS dongle 3038 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3039 #endif 3040 3041 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3042 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3043 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3044 } else { 3045 // if not, pretend everything is perfect 3046 hci_handle_read_encryption_key_size_complete(conn, 16); 3047 } 3048 } 3049 #endif 3050 } else { 3051 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3052 } 3053 } 3054 3055 break; 3056 3057 #ifdef ENABLE_CLASSIC 3058 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3059 handle = hci_event_authentication_complete_get_connection_handle(packet); 3060 conn = hci_connection_for_handle(handle); 3061 if (!conn) break; 3062 3063 // clear authentication active flag 3064 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3065 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3066 3067 // authenticated only if auth status == 0 3068 if (hci_event_authentication_complete_get_status(packet) == 0){ 3069 // authenticated 3070 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3071 3072 // If not already encrypted, start encryption 3073 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3074 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3075 break; 3076 } 3077 } 3078 3079 // emit updated security level 3080 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3081 break; 3082 3083 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3084 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3085 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3086 if (!conn) break; 3087 3088 // treat successfully paired connection as authenticated 3089 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3090 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3091 } 3092 3093 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3094 break; 3095 #endif 3096 3097 // HCI_EVENT_DISCONNECTION_COMPLETE 3098 // has been split, to first notify stack before shutting connection down 3099 // see end of function, too. 3100 case HCI_EVENT_DISCONNECTION_COMPLETE: 3101 if (packet[2]) break; // status != 0 3102 handle = little_endian_read_16(packet, 3); 3103 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3104 if (hci_stack->acl_fragmentation_total_size > 0u) { 3105 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3106 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3107 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3108 hci_stack->acl_fragmentation_total_size = 0; 3109 hci_stack->acl_fragmentation_pos = 0; 3110 if (release_buffer){ 3111 hci_release_packet_buffer(); 3112 } 3113 } 3114 } 3115 3116 conn = hci_connection_for_handle(handle); 3117 if (!conn) break; 3118 #ifdef ENABLE_CLASSIC 3119 // pairing failed if it was ongoing 3120 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3121 #endif 3122 3123 // emit dedicatd bonding event 3124 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3125 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3126 } 3127 3128 // mark connection for shutdown, stop timers, reset state 3129 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3130 hci_connection_stop_timer(conn); 3131 hci_connection_init(conn); 3132 3133 #ifdef ENABLE_BLE 3134 #ifdef ENABLE_LE_PERIPHERAL 3135 // re-enable advertisements for le connections if active 3136 if (hci_is_le_connection(conn)){ 3137 hci_update_advertisements_enabled_for_current_roles(); 3138 } 3139 #endif 3140 #endif 3141 break; 3142 3143 case HCI_EVENT_HARDWARE_ERROR: 3144 log_error("Hardware Error: 0x%02x", packet[2]); 3145 if (hci_stack->hardware_error_callback){ 3146 (*hci_stack->hardware_error_callback)(packet[2]); 3147 } else { 3148 // if no special requests, just reboot stack 3149 hci_power_control_off(); 3150 hci_power_control_on(); 3151 } 3152 break; 3153 3154 #ifdef ENABLE_CLASSIC 3155 case HCI_EVENT_ROLE_CHANGE: 3156 if (packet[2]) break; // status != 0 3157 reverse_bd_addr(&packet[3], addr); 3158 addr_type = BD_ADDR_TYPE_ACL; 3159 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3160 if (!conn) break; 3161 conn->role = packet[9]; 3162 break; 3163 #endif 3164 3165 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3166 // release packet buffer only for asynchronous transport and if there are not further fragements 3167 if (hci_transport_synchronous()) { 3168 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3169 return; // instead of break: to avoid re-entering hci_run() 3170 } 3171 hci_stack->acl_fragmentation_tx_active = 0; 3172 if (hci_stack->acl_fragmentation_total_size) break; 3173 hci_release_packet_buffer(); 3174 3175 // L2CAP receives this event via the hci_emit_event below 3176 3177 #ifdef ENABLE_CLASSIC 3178 // For SCO, we do the can_send_now_check here 3179 hci_notify_if_sco_can_send_now(); 3180 #endif 3181 break; 3182 3183 #ifdef ENABLE_CLASSIC 3184 case HCI_EVENT_SCO_CAN_SEND_NOW: 3185 // For SCO, we do the can_send_now_check here 3186 hci_stack->sco_can_send_now = true; 3187 hci_notify_if_sco_can_send_now(); 3188 return; 3189 3190 // explode inquriy results for easier consumption 3191 case HCI_EVENT_INQUIRY_RESULT: 3192 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3193 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3194 gap_inquiry_explode(packet, size); 3195 break; 3196 #endif 3197 3198 #ifdef ENABLE_BLE 3199 case HCI_EVENT_LE_META: 3200 switch (packet[2]){ 3201 #ifdef ENABLE_LE_CENTRAL 3202 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3203 // log_info("advertising report received"); 3204 if (!hci_stack->le_scanning_enabled) break; 3205 le_handle_advertisement_report(packet, size); 3206 break; 3207 #endif 3208 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3209 event_handle_le_connection_complete(packet); 3210 break; 3211 3212 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3213 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3214 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3215 conn = hci_connection_for_handle(handle); 3216 if (!conn) break; 3217 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3218 break; 3219 3220 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3221 // connection 3222 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3223 conn = hci_connection_for_handle(handle); 3224 if (conn) { 3225 // read arguments 3226 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3227 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3228 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3229 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3230 3231 // validate against current connection parameter range 3232 le_connection_parameter_range_t existing_range; 3233 gap_get_connection_parameter_range(&existing_range); 3234 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3235 if (update_parameter){ 3236 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3237 conn->le_conn_interval_min = le_conn_interval_min; 3238 conn->le_conn_interval_max = le_conn_interval_max; 3239 conn->le_conn_latency = le_conn_latency; 3240 conn->le_supervision_timeout = le_supervision_timeout; 3241 } else { 3242 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3243 } 3244 } 3245 break; 3246 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3247 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3248 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3249 conn = hci_connection_for_handle(handle); 3250 if (conn) { 3251 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3252 } 3253 break; 3254 #endif 3255 default: 3256 break; 3257 } 3258 break; 3259 #endif 3260 case HCI_EVENT_VENDOR_SPECIFIC: 3261 // Vendor specific commands often create vendor specific event instead of num completed packets 3262 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3263 switch (hci_stack->manufacturer){ 3264 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3265 hci_stack->num_cmd_packets = 1; 3266 break; 3267 default: 3268 break; 3269 } 3270 break; 3271 default: 3272 break; 3273 } 3274 3275 handle_event_for_current_stack_state(packet, size); 3276 3277 // notify upper stack 3278 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3279 3280 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3281 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3282 handle = little_endian_read_16(packet, 3); 3283 hci_connection_t * aConn = hci_connection_for_handle(handle); 3284 // discard connection if app did not trigger a reconnect in the event handler 3285 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3286 hci_shutdown_connection(aConn); 3287 } 3288 } 3289 3290 // execute main loop 3291 hci_run(); 3292 } 3293 3294 #ifdef ENABLE_CLASSIC 3295 3296 #ifdef ENABLE_SCO_OVER_HCI 3297 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3298 static void sco_schedule_tx(hci_connection_t * conn); 3299 3300 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3301 log_debug("SCO TX Timeout"); 3302 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3303 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3304 if (!conn) return; 3305 3306 // trigger send 3307 conn->sco_tx_ready = 1; 3308 // extra packet if CVSD but SCO buffer is too short 3309 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3310 conn->sco_tx_ready++; 3311 } 3312 hci_notify_if_sco_can_send_now(); 3313 } 3314 3315 3316 #define SCO_TX_AFTER_RX_MS (6) 3317 3318 static void sco_schedule_tx(hci_connection_t * conn){ 3319 3320 uint32_t now = btstack_run_loop_get_time_ms(); 3321 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3322 int time_delta_ms = sco_tx_ms - now; 3323 3324 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3325 3326 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3327 btstack_run_loop_remove_timer(timer); 3328 btstack_run_loop_set_timer(timer, time_delta_ms); 3329 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3330 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3331 btstack_run_loop_add_timer(timer); 3332 } 3333 #endif 3334 3335 static void sco_handler(uint8_t * packet, uint16_t size){ 3336 // lookup connection struct 3337 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3338 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3339 if (!conn) return; 3340 3341 #ifdef ENABLE_SCO_OVER_HCI 3342 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3343 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3344 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3345 packet[2] = 0x3c; 3346 memmove(&packet[3], &packet[23], 63); 3347 size = 63; 3348 } 3349 } 3350 3351 if (hci_have_usb_transport()){ 3352 // Nothing to do 3353 } else { 3354 // 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); 3355 if (hci_stack->synchronous_flow_control_enabled == 0){ 3356 uint32_t now = btstack_run_loop_get_time_ms(); 3357 3358 if (!conn->sco_rx_valid){ 3359 // ignore first 10 packets 3360 conn->sco_rx_count++; 3361 // log_debug("sco rx count %u", conn->sco_rx_count); 3362 if (conn->sco_rx_count == 10) { 3363 // use first timestamp as is and pretent it just started 3364 conn->sco_rx_ms = now; 3365 conn->sco_rx_valid = 1; 3366 conn->sco_rx_count = 0; 3367 sco_schedule_tx(conn); 3368 } 3369 } else { 3370 // track expected arrival timme 3371 conn->sco_rx_count++; 3372 conn->sco_rx_ms += 7; 3373 int delta = (int32_t) (now - conn->sco_rx_ms); 3374 if (delta > 0){ 3375 conn->sco_rx_ms++; 3376 } 3377 // log_debug("sco rx %u", conn->sco_rx_ms); 3378 sco_schedule_tx(conn); 3379 } 3380 } 3381 } 3382 #endif 3383 3384 // deliver to app 3385 if (hci_stack->sco_packet_handler) { 3386 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3387 } 3388 3389 #ifdef HAVE_SCO_TRANSPORT 3390 // We can send one packet for each received packet 3391 conn->sco_tx_ready++; 3392 hci_notify_if_sco_can_send_now(); 3393 #endif 3394 3395 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3396 conn->num_packets_completed++; 3397 hci_stack->host_completed_packets = 1; 3398 hci_run(); 3399 #endif 3400 } 3401 #endif 3402 3403 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3404 hci_dump_packet(packet_type, 1, packet, size); 3405 switch (packet_type) { 3406 case HCI_EVENT_PACKET: 3407 event_handler(packet, size); 3408 break; 3409 case HCI_ACL_DATA_PACKET: 3410 acl_handler(packet, size); 3411 break; 3412 #ifdef ENABLE_CLASSIC 3413 case HCI_SCO_DATA_PACKET: 3414 sco_handler(packet, size); 3415 break; 3416 #endif 3417 default: 3418 break; 3419 } 3420 } 3421 3422 /** 3423 * @brief Add event packet handler. 3424 */ 3425 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3426 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3427 } 3428 3429 /** 3430 * @brief Remove event packet handler. 3431 */ 3432 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3433 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3434 } 3435 3436 /** Register HCI packet handlers */ 3437 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3438 hci_stack->acl_packet_handler = handler; 3439 } 3440 3441 #ifdef ENABLE_CLASSIC 3442 /** 3443 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3444 */ 3445 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3446 hci_stack->sco_packet_handler = handler; 3447 } 3448 #endif 3449 3450 static void hci_state_reset(void){ 3451 // no connections yet 3452 hci_stack->connections = NULL; 3453 3454 // keep discoverable/connectable as this has been requested by the client(s) 3455 // hci_stack->discoverable = 0; 3456 // hci_stack->connectable = 0; 3457 // hci_stack->bondable = 1; 3458 // hci_stack->own_addr_type = 0; 3459 3460 // buffer is free 3461 hci_stack->hci_packet_buffer_reserved = false; 3462 3463 // no pending cmds 3464 hci_stack->decline_reason = 0; 3465 3466 hci_stack->secure_connections_active = false; 3467 3468 #ifdef ENABLE_CLASSIC 3469 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3470 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3471 3472 hci_stack->gap_tasks = 3473 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3474 GAP_TASK_SET_CLASS_OF_DEVICE | 3475 GAP_TASK_SET_LOCAL_NAME | 3476 GAP_TASK_SET_EIR_DATA | 3477 GAP_TASK_WRITE_SCAN_ENABLE | 3478 GAP_TASK_WRITE_PAGE_TIMEOUT; 3479 #endif 3480 3481 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3482 hci_stack->classic_read_local_oob_data = false; 3483 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3484 #endif 3485 3486 // LE 3487 #ifdef ENABLE_BLE 3488 memset(hci_stack->le_random_address, 0, 6); 3489 hci_stack->le_random_address_set = 0; 3490 #endif 3491 #ifdef ENABLE_LE_CENTRAL 3492 hci_stack->le_scanning_active = false; 3493 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3494 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3495 hci_stack->le_whitelist_capacity = 0; 3496 #endif 3497 #ifdef ENABLE_LE_PERIPHERAL 3498 hci_stack->le_advertisements_active = false; 3499 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3500 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3501 } 3502 if (hci_stack->le_advertisements_data != NULL){ 3503 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3504 } 3505 #endif 3506 } 3507 3508 #ifdef ENABLE_CLASSIC 3509 /** 3510 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3511 */ 3512 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3513 // store and open remote device db 3514 hci_stack->link_key_db = link_key_db; 3515 if (hci_stack->link_key_db) { 3516 hci_stack->link_key_db->open(); 3517 } 3518 } 3519 #endif 3520 3521 void hci_init(const hci_transport_t *transport, const void *config){ 3522 3523 #ifdef HAVE_MALLOC 3524 if (!hci_stack) { 3525 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3526 } 3527 #else 3528 hci_stack = &hci_stack_static; 3529 #endif 3530 memset(hci_stack, 0, sizeof(hci_stack_t)); 3531 3532 // reference to use transport layer implementation 3533 hci_stack->hci_transport = transport; 3534 3535 // reference to used config 3536 hci_stack->config = config; 3537 3538 // setup pointer for outgoing packet buffer 3539 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3540 3541 // max acl payload size defined in config.h 3542 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3543 3544 // register packet handlers with transport 3545 transport->register_packet_handler(&packet_handler); 3546 3547 hci_stack->state = HCI_STATE_OFF; 3548 3549 // class of device 3550 hci_stack->class_of_device = 0x007a020c; // Smartphone 3551 3552 // bondable by default 3553 hci_stack->bondable = 1; 3554 3555 #ifdef ENABLE_CLASSIC 3556 // classic name 3557 hci_stack->local_name = default_classic_name; 3558 3559 // Master slave policy 3560 hci_stack->master_slave_policy = 1; 3561 3562 // Allow Role Switch 3563 hci_stack->allow_role_switch = 1; 3564 3565 // Default / minimum security level = 2 3566 hci_stack->gap_security_level = LEVEL_2; 3567 3568 // Default Security Mode 4 3569 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3570 3571 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3572 hci_stack->gap_required_encyrption_key_size = 7; 3573 3574 // Link Supervision Timeout 3575 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3576 3577 #endif 3578 3579 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3580 hci_stack->ssp_enable = 1; 3581 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3582 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3583 hci_stack->ssp_auto_accept = 1; 3584 3585 // Secure Connections: enable (requires support from Controller) 3586 hci_stack->secure_connections_enable = true; 3587 3588 // voice setting - signed 16 bit pcm data with CVSD over the air 3589 hci_stack->sco_voice_setting = 0x60; 3590 3591 #ifdef ENABLE_LE_CENTRAL 3592 // connection parameter to use for outgoing connections 3593 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3594 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3595 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3596 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3597 hci_stack->le_connection_latency = 4; // 4 3598 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3599 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3600 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3601 3602 // default LE Scanning 3603 hci_stack->le_scan_type = 0x1; // active 3604 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3605 hci_stack->le_scan_window = 0x30; // 30 ms 3606 #endif 3607 3608 #ifdef ENABLE_LE_PERIPHERAL 3609 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3610 #endif 3611 3612 // connection parameter range used to answer connection parameter update requests in l2cap 3613 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3614 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3615 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3616 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3617 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3618 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3619 3620 hci_state_reset(); 3621 } 3622 3623 void hci_deinit(void){ 3624 #ifdef HAVE_MALLOC 3625 if (hci_stack) { 3626 free(hci_stack); 3627 } 3628 #endif 3629 hci_stack = NULL; 3630 3631 #ifdef ENABLE_CLASSIC 3632 disable_l2cap_timeouts = 0; 3633 #endif 3634 } 3635 3636 /** 3637 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3638 */ 3639 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3640 hci_stack->chipset = chipset_driver; 3641 3642 // reset chipset driver - init is also called on power_up 3643 if (hci_stack->chipset && hci_stack->chipset->init){ 3644 hci_stack->chipset->init(hci_stack->config); 3645 } 3646 } 3647 3648 /** 3649 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3650 */ 3651 void hci_set_control(const btstack_control_t *hardware_control){ 3652 // references to used control implementation 3653 hci_stack->control = hardware_control; 3654 // init with transport config 3655 hardware_control->init(hci_stack->config); 3656 } 3657 3658 static void hci_discard_connections(void){ 3659 btstack_linked_list_iterator_t lit; 3660 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3661 while (btstack_linked_list_iterator_has_next(&lit)){ 3662 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3663 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3664 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3665 hci_shutdown_connection(connection); 3666 } 3667 } 3668 3669 void hci_close(void){ 3670 3671 #ifdef ENABLE_CLASSIC 3672 // close remote device db 3673 if (hci_stack->link_key_db) { 3674 hci_stack->link_key_db->close(); 3675 } 3676 #endif 3677 3678 hci_discard_connections(); 3679 3680 hci_power_control(HCI_POWER_OFF); 3681 3682 #ifdef HAVE_MALLOC 3683 free(hci_stack); 3684 #endif 3685 hci_stack = NULL; 3686 } 3687 3688 #ifdef HAVE_SCO_TRANSPORT 3689 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3690 hci_stack->sco_transport = sco_transport; 3691 sco_transport->register_packet_handler(&packet_handler); 3692 } 3693 #endif 3694 3695 #ifdef ENABLE_CLASSIC 3696 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3697 // validate ranage and set 3698 if (encryption_key_size < 7) return; 3699 if (encryption_key_size > 16) return; 3700 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3701 } 3702 3703 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3704 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3705 hci_stack->gap_security_mode = security_mode; 3706 return ERROR_CODE_SUCCESS; 3707 } else { 3708 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3709 } 3710 } 3711 3712 gap_security_mode_t gap_get_security_mode(void){ 3713 return hci_stack->gap_security_mode; 3714 } 3715 3716 void gap_set_security_level(gap_security_level_t security_level){ 3717 hci_stack->gap_security_level = security_level; 3718 } 3719 3720 gap_security_level_t gap_get_security_level(void){ 3721 if (hci_stack->gap_secure_connections_only_mode){ 3722 return LEVEL_4; 3723 } 3724 return hci_stack->gap_security_level; 3725 } 3726 3727 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3728 hci_stack->gap_minimal_service_security_level = security_level; 3729 } 3730 3731 void gap_set_secure_connections_only_mode(bool enable){ 3732 hci_stack->gap_secure_connections_only_mode = enable; 3733 } 3734 3735 bool gap_get_secure_connections_only_mode(void){ 3736 return hci_stack->gap_secure_connections_only_mode; 3737 } 3738 #endif 3739 3740 #ifdef ENABLE_CLASSIC 3741 void gap_set_class_of_device(uint32_t class_of_device){ 3742 hci_stack->class_of_device = class_of_device; 3743 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3744 hci_run(); 3745 } 3746 3747 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3748 hci_stack->default_link_policy_settings = default_link_policy_settings; 3749 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3750 hci_run(); 3751 } 3752 3753 void gap_set_allow_role_switch(bool allow_role_switch){ 3754 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3755 } 3756 3757 uint8_t hci_get_allow_role_switch(void){ 3758 return hci_stack->allow_role_switch; 3759 } 3760 3761 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3762 hci_stack->link_supervision_timeout = link_supervision_timeout; 3763 } 3764 3765 void hci_disable_l2cap_timeout_check(void){ 3766 disable_l2cap_timeouts = 1; 3767 } 3768 #endif 3769 3770 #ifndef HAVE_HOST_CONTROLLER_API 3771 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3772 void hci_set_bd_addr(bd_addr_t addr){ 3773 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3774 hci_stack->custom_bd_addr_set = 1; 3775 } 3776 #endif 3777 3778 // State-Module-Driver overview 3779 // state module low-level 3780 // HCI_STATE_OFF off close 3781 // HCI_STATE_INITIALIZING, on open 3782 // HCI_STATE_WORKING, on open 3783 // HCI_STATE_HALTING, on open 3784 // HCI_STATE_SLEEPING, off/sleep close 3785 // HCI_STATE_FALLING_ASLEEP on open 3786 3787 static int hci_power_control_on(void){ 3788 3789 // power on 3790 int err = 0; 3791 if (hci_stack->control && hci_stack->control->on){ 3792 err = (*hci_stack->control->on)(); 3793 } 3794 if (err){ 3795 log_error( "POWER_ON failed"); 3796 hci_emit_hci_open_failed(); 3797 return err; 3798 } 3799 3800 // int chipset driver 3801 if (hci_stack->chipset && hci_stack->chipset->init){ 3802 hci_stack->chipset->init(hci_stack->config); 3803 } 3804 3805 // init transport 3806 if (hci_stack->hci_transport->init){ 3807 hci_stack->hci_transport->init(hci_stack->config); 3808 } 3809 3810 // open transport 3811 err = hci_stack->hci_transport->open(); 3812 if (err){ 3813 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3814 if (hci_stack->control && hci_stack->control->off){ 3815 (*hci_stack->control->off)(); 3816 } 3817 hci_emit_hci_open_failed(); 3818 return err; 3819 } 3820 return 0; 3821 } 3822 3823 static void hci_power_control_off(void){ 3824 3825 log_info("hci_power_control_off"); 3826 3827 // close low-level device 3828 hci_stack->hci_transport->close(); 3829 3830 log_info("hci_power_control_off - hci_transport closed"); 3831 3832 // power off 3833 if (hci_stack->control && hci_stack->control->off){ 3834 (*hci_stack->control->off)(); 3835 } 3836 3837 log_info("hci_power_control_off - control closed"); 3838 3839 hci_stack->state = HCI_STATE_OFF; 3840 } 3841 3842 static void hci_power_control_sleep(void){ 3843 3844 log_info("hci_power_control_sleep"); 3845 3846 #if 0 3847 // don't close serial port during sleep 3848 3849 // close low-level device 3850 hci_stack->hci_transport->close(hci_stack->config); 3851 #endif 3852 3853 // sleep mode 3854 if (hci_stack->control && hci_stack->control->sleep){ 3855 (*hci_stack->control->sleep)(); 3856 } 3857 3858 hci_stack->state = HCI_STATE_SLEEPING; 3859 } 3860 3861 static int hci_power_control_wake(void){ 3862 3863 log_info("hci_power_control_wake"); 3864 3865 // wake on 3866 if (hci_stack->control && hci_stack->control->wake){ 3867 (*hci_stack->control->wake)(); 3868 } 3869 3870 #if 0 3871 // open low-level device 3872 int err = hci_stack->hci_transport->open(hci_stack->config); 3873 if (err){ 3874 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3875 if (hci_stack->control && hci_stack->control->off){ 3876 (*hci_stack->control->off)(); 3877 } 3878 hci_emit_hci_open_failed(); 3879 return err; 3880 } 3881 #endif 3882 3883 return 0; 3884 } 3885 3886 static void hci_power_transition_to_initializing(void){ 3887 // set up state machine 3888 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3889 hci_stack->hci_packet_buffer_reserved = false; 3890 hci_stack->state = HCI_STATE_INITIALIZING; 3891 hci_stack->substate = HCI_INIT_SEND_RESET; 3892 } 3893 3894 // returns error 3895 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3896 int err; 3897 switch (power_mode){ 3898 case HCI_POWER_ON: 3899 err = hci_power_control_on(); 3900 if (err != 0) { 3901 log_error("hci_power_control_on() error %d", err); 3902 return err; 3903 } 3904 hci_power_transition_to_initializing(); 3905 break; 3906 case HCI_POWER_OFF: 3907 // do nothing 3908 break; 3909 case HCI_POWER_SLEEP: 3910 // do nothing (with SLEEP == OFF) 3911 break; 3912 default: 3913 btstack_assert(false); 3914 break; 3915 } 3916 return ERROR_CODE_SUCCESS; 3917 } 3918 3919 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3920 switch (power_mode){ 3921 case HCI_POWER_ON: 3922 // do nothing 3923 break; 3924 case HCI_POWER_OFF: 3925 // no connections yet, just turn it off 3926 hci_power_control_off(); 3927 break; 3928 case HCI_POWER_SLEEP: 3929 // no connections yet, just turn it off 3930 hci_power_control_sleep(); 3931 break; 3932 default: 3933 btstack_assert(false); 3934 break; 3935 } 3936 return ERROR_CODE_SUCCESS; 3937 } 3938 3939 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3940 switch (power_mode){ 3941 case HCI_POWER_ON: 3942 // do nothing 3943 break; 3944 case HCI_POWER_OFF: 3945 // see hci_run 3946 hci_stack->state = HCI_STATE_HALTING; 3947 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3948 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3949 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3950 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3951 btstack_run_loop_add_timer(&hci_stack->timeout); 3952 break; 3953 case HCI_POWER_SLEEP: 3954 // see hci_run 3955 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3956 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3957 break; 3958 default: 3959 btstack_assert(false); 3960 break; 3961 } 3962 return ERROR_CODE_SUCCESS; 3963 } 3964 3965 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3966 switch (power_mode){ 3967 case HCI_POWER_ON: 3968 hci_power_transition_to_initializing(); 3969 break; 3970 case HCI_POWER_OFF: 3971 // do nothing 3972 break; 3973 case HCI_POWER_SLEEP: 3974 // see hci_run 3975 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3976 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3977 break; 3978 default: 3979 btstack_assert(false); 3980 break; 3981 } 3982 return ERROR_CODE_SUCCESS; 3983 } 3984 3985 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3986 switch (power_mode){ 3987 case HCI_POWER_ON: 3988 hci_power_transition_to_initializing(); 3989 break; 3990 case HCI_POWER_OFF: 3991 // see hci_run 3992 hci_stack->state = HCI_STATE_HALTING; 3993 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3994 break; 3995 case HCI_POWER_SLEEP: 3996 // do nothing 3997 break; 3998 default: 3999 btstack_assert(false); 4000 break; 4001 } 4002 return ERROR_CODE_SUCCESS; 4003 } 4004 4005 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4006 int err; 4007 switch (power_mode){ 4008 case HCI_POWER_ON: 4009 err = hci_power_control_wake(); 4010 if (err) return err; 4011 hci_power_transition_to_initializing(); 4012 break; 4013 case HCI_POWER_OFF: 4014 hci_stack->state = HCI_STATE_HALTING; 4015 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4016 break; 4017 case HCI_POWER_SLEEP: 4018 // do nothing 4019 break; 4020 default: 4021 btstack_assert(false); 4022 break; 4023 } 4024 return ERROR_CODE_SUCCESS; 4025 } 4026 4027 int hci_power_control(HCI_POWER_MODE power_mode){ 4028 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4029 int err = 0; 4030 switch (hci_stack->state){ 4031 case HCI_STATE_OFF: 4032 err = hci_power_control_state_off(power_mode); 4033 break; 4034 case HCI_STATE_INITIALIZING: 4035 err = hci_power_control_state_initializing(power_mode); 4036 break; 4037 case HCI_STATE_WORKING: 4038 err = hci_power_control_state_working(power_mode); 4039 break; 4040 case HCI_STATE_HALTING: 4041 err = hci_power_control_state_halting(power_mode); 4042 break; 4043 case HCI_STATE_FALLING_ASLEEP: 4044 err = hci_power_control_state_falling_asleep(power_mode); 4045 break; 4046 case HCI_STATE_SLEEPING: 4047 err = hci_power_control_state_sleeping(power_mode); 4048 break; 4049 default: 4050 btstack_assert(false); 4051 break; 4052 } 4053 if (err != 0){ 4054 return err; 4055 } 4056 4057 // create internal event 4058 hci_emit_state(); 4059 4060 // trigger next/first action 4061 hci_run(); 4062 4063 return 0; 4064 } 4065 4066 4067 static void hci_halting_run(void){ 4068 4069 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4070 4071 hci_connection_t * connection; 4072 4073 switch (hci_stack->substate) { 4074 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4075 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4076 4077 #ifdef ENABLE_BLE 4078 #ifdef ENABLE_LE_CENTRAL 4079 hci_whitelist_free(); 4080 #endif 4081 #endif 4082 // close all open connections 4083 connection = (hci_connection_t *) hci_stack->connections; 4084 if (connection) { 4085 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4086 if (!hci_can_send_command_packet_now()) return; 4087 4088 // check state 4089 if (connection->state == SENT_DISCONNECT) return; 4090 connection->state = SENT_DISCONNECT; 4091 4092 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4093 4094 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4095 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4096 4097 // ... which would be ignored anyway as we shutdown (free) the connection now 4098 hci_shutdown_connection(connection); 4099 4100 // finally, send the disconnect command 4101 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4102 return; 4103 } 4104 4105 btstack_run_loop_remove_timer(&hci_stack->timeout); 4106 4107 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4108 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4109 log_info("HCI_STATE_HALTING: wait 50 ms"); 4110 hci_stack->substate = HCI_HALTING_W4_TIMER; 4111 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4112 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4113 btstack_run_loop_add_timer(&hci_stack->timeout); 4114 break; 4115 } 4116 4117 /* fall through */ 4118 4119 case HCI_HALTING_CLOSE: 4120 // close left over connections (that had not been properly closed before) 4121 hci_discard_connections(); 4122 4123 log_info("HCI_STATE_HALTING, calling off"); 4124 4125 // switch mode 4126 hci_power_control_off(); 4127 4128 log_info("HCI_STATE_HALTING, emitting state"); 4129 hci_emit_state(); 4130 log_info("HCI_STATE_HALTING, done"); 4131 break; 4132 4133 case HCI_HALTING_W4_TIMER: 4134 // keep waiting 4135 4136 break; 4137 default: 4138 break; 4139 } 4140 }; 4141 4142 static void hci_falling_asleep_run(void){ 4143 hci_connection_t * connection; 4144 switch(hci_stack->substate) { 4145 case HCI_FALLING_ASLEEP_DISCONNECT: 4146 log_info("HCI_STATE_FALLING_ASLEEP"); 4147 // close all open connections 4148 connection = (hci_connection_t *) hci_stack->connections; 4149 if (connection){ 4150 4151 // send disconnect 4152 if (!hci_can_send_command_packet_now()) return; 4153 4154 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4155 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4156 4157 // send disconnected event right away - causes higher layer connections to get closed, too. 4158 hci_shutdown_connection(connection); 4159 return; 4160 } 4161 4162 if (hci_classic_supported()){ 4163 // disable page and inquiry scan 4164 if (!hci_can_send_command_packet_now()) return; 4165 4166 log_info("HCI_STATE_HALTING, disabling inq scans"); 4167 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4168 4169 // continue in next sub state 4170 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4171 break; 4172 } 4173 4174 /* fall through */ 4175 4176 case HCI_FALLING_ASLEEP_COMPLETE: 4177 log_info("HCI_STATE_HALTING, calling sleep"); 4178 // switch mode 4179 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4180 hci_emit_state(); 4181 break; 4182 4183 default: 4184 break; 4185 } 4186 } 4187 4188 #ifdef ENABLE_CLASSIC 4189 4190 static void hci_update_scan_enable(void){ 4191 // 2 = page scan, 1 = inq scan 4192 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4193 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4194 hci_run(); 4195 } 4196 4197 void gap_discoverable_control(uint8_t enable){ 4198 if (enable) enable = 1; // normalize argument 4199 4200 if (hci_stack->discoverable == enable){ 4201 hci_emit_discoverable_enabled(hci_stack->discoverable); 4202 return; 4203 } 4204 4205 hci_stack->discoverable = enable; 4206 hci_update_scan_enable(); 4207 } 4208 4209 void gap_connectable_control(uint8_t enable){ 4210 if (enable) enable = 1; // normalize argument 4211 4212 // don't emit event 4213 if (hci_stack->connectable == enable) return; 4214 4215 hci_stack->connectable = enable; 4216 hci_update_scan_enable(); 4217 } 4218 #endif 4219 4220 void gap_local_bd_addr(bd_addr_t address_buffer){ 4221 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4222 } 4223 4224 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4225 static void hci_host_num_completed_packets(void){ 4226 4227 // create packet manually as arrays are not supported and num_commands should not get reduced 4228 hci_reserve_packet_buffer(); 4229 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4230 4231 uint16_t size = 0; 4232 uint16_t num_handles = 0; 4233 packet[size++] = 0x35; 4234 packet[size++] = 0x0c; 4235 size++; // skip param len 4236 size++; // skip num handles 4237 4238 // add { handle, packets } entries 4239 btstack_linked_item_t * it; 4240 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4241 hci_connection_t * connection = (hci_connection_t *) it; 4242 if (connection->num_packets_completed){ 4243 little_endian_store_16(packet, size, connection->con_handle); 4244 size += 2; 4245 little_endian_store_16(packet, size, connection->num_packets_completed); 4246 size += 2; 4247 // 4248 num_handles++; 4249 connection->num_packets_completed = 0; 4250 } 4251 } 4252 4253 packet[2] = size - 3; 4254 packet[3] = num_handles; 4255 4256 hci_stack->host_completed_packets = 0; 4257 4258 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4259 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4260 4261 // release packet buffer for synchronous transport implementations 4262 if (hci_transport_synchronous()){ 4263 hci_release_packet_buffer(); 4264 hci_emit_transport_packet_sent(); 4265 } 4266 } 4267 #endif 4268 4269 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4270 UNUSED(ds); 4271 hci_stack->substate = HCI_HALTING_CLOSE; 4272 // allow packet handlers to defer final shutdown 4273 hci_emit_state(); 4274 hci_run(); 4275 } 4276 4277 static bool hci_run_acl_fragments(void){ 4278 if (hci_stack->acl_fragmentation_total_size > 0u) { 4279 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4280 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4281 if (connection) { 4282 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4283 hci_send_acl_packet_fragments(connection); 4284 return true; 4285 } 4286 } else { 4287 // connection gone -> discard further fragments 4288 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4289 hci_stack->acl_fragmentation_total_size = 0; 4290 hci_stack->acl_fragmentation_pos = 0; 4291 } 4292 } 4293 return false; 4294 } 4295 4296 #ifdef ENABLE_CLASSIC 4297 static bool hci_run_general_gap_classic(void){ 4298 4299 // assert stack is working and classic is active 4300 if (hci_classic_supported() == false) return false; 4301 if (hci_stack->state != HCI_STATE_WORKING) return false; 4302 4303 // decline incoming connections 4304 if (hci_stack->decline_reason){ 4305 uint8_t reason = hci_stack->decline_reason; 4306 hci_stack->decline_reason = 0; 4307 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4308 return true; 4309 } 4310 4311 if (hci_stack->gap_tasks != 0){ 4312 hci_run_gap_tasks_classic(); 4313 return true; 4314 } 4315 4316 // start/stop inquiry 4317 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4318 uint8_t duration = hci_stack->inquiry_state; 4319 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4320 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4321 return true; 4322 } 4323 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4324 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4325 hci_send_cmd(&hci_inquiry_cancel); 4326 return true; 4327 } 4328 // remote name request 4329 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4330 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4331 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4332 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4333 return true; 4334 } 4335 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4336 // Local OOB data 4337 if (hci_stack->classic_read_local_oob_data){ 4338 hci_stack->classic_read_local_oob_data = false; 4339 if (hci_stack->local_supported_commands[1] & 0x10u){ 4340 hci_send_cmd(&hci_read_local_extended_oob_data); 4341 } else { 4342 hci_send_cmd(&hci_read_local_oob_data); 4343 } 4344 } 4345 #endif 4346 // pairing 4347 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4348 uint8_t state = hci_stack->gap_pairing_state; 4349 uint8_t pin_code[16]; 4350 switch (state){ 4351 case GAP_PAIRING_STATE_SEND_PIN: 4352 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4353 memset(pin_code, 0, 16); 4354 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4355 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4356 break; 4357 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4358 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4359 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4360 break; 4361 case GAP_PAIRING_STATE_SEND_PASSKEY: 4362 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4363 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4364 break; 4365 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4366 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4367 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4368 break; 4369 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4370 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4371 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4372 break; 4373 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4374 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4375 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4376 break; 4377 default: 4378 break; 4379 } 4380 return true; 4381 } 4382 return false; 4383 } 4384 #endif 4385 4386 #ifdef ENABLE_BLE 4387 static bool hci_run_general_gap_le(void){ 4388 4389 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4390 4391 if (hci_stack->state != HCI_STATE_WORKING) return false; 4392 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4393 4394 4395 // Phase 1: collect what to stop 4396 4397 bool scanning_stop = false; 4398 bool connecting_stop = false; 4399 bool advertising_stop = false; 4400 4401 #ifndef ENABLE_LE_CENTRAL 4402 UNUSED(scanning_stop); 4403 UNUSED(connecting_stop); 4404 #endif 4405 #ifndef ENABLE_LE_PERIPHERAL 4406 UNUSED(advertising_stop); 4407 #endif 4408 4409 // check if own address changes 4410 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4411 4412 // check if whitelist needs modification 4413 bool whitelist_modification_pending = false; 4414 btstack_linked_list_iterator_t lit; 4415 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4416 while (btstack_linked_list_iterator_has_next(&lit)){ 4417 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4418 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4419 whitelist_modification_pending = true; 4420 break; 4421 } 4422 } 4423 // check if resolving list needs modification 4424 bool resolving_list_modification_pending = false; 4425 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4426 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4427 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4428 resolving_list_modification_pending = true; 4429 } 4430 #endif 4431 4432 #ifdef ENABLE_LE_CENTRAL 4433 // scanning control 4434 if (hci_stack->le_scanning_active) { 4435 // stop if: 4436 // - parameter change required 4437 // - it's disabled 4438 // - whitelist change required but used for scanning 4439 // - resolving list modified 4440 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4441 if ((hci_stack->le_scanning_param_update) || 4442 !hci_stack->le_scanning_enabled || 4443 scanning_uses_whitelist || 4444 resolving_list_modification_pending){ 4445 4446 scanning_stop = true; 4447 } 4448 } 4449 #endif 4450 4451 #ifdef ENABLE_LE_CENTRAL 4452 // connecting control 4453 bool connecting_with_whitelist; 4454 switch (hci_stack->le_connecting_state){ 4455 case LE_CONNECTING_DIRECT: 4456 case LE_CONNECTING_WHITELIST: 4457 // stop connecting if: 4458 // - connecting uses white and whitelist modification pending 4459 // - if it got disabled 4460 // - resolving list modified 4461 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4462 if ((connecting_with_whitelist && whitelist_modification_pending) || 4463 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4464 resolving_list_modification_pending) { 4465 4466 connecting_stop = true; 4467 } 4468 break; 4469 default: 4470 break; 4471 } 4472 #endif 4473 4474 #ifdef ENABLE_LE_PERIPHERAL 4475 // le advertisement control 4476 if (hci_stack->le_advertisements_active){ 4477 // stop if: 4478 // - parameter change required 4479 // - random address used in advertising and changes 4480 // - it's disabled 4481 // - whitelist change required but used for advertisement filter policy 4482 // - resolving list modified 4483 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4484 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4485 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4486 if (advertising_change || 4487 (advertising_uses_random_address && random_address_change) || 4488 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4489 (advertising_uses_whitelist && whitelist_modification_pending) || 4490 resolving_list_modification_pending) { 4491 4492 advertising_stop = true; 4493 } 4494 } 4495 #endif 4496 4497 4498 // Phase 2: stop everything that should be off during modifications 4499 4500 #ifdef ENABLE_LE_CENTRAL 4501 if (scanning_stop){ 4502 hci_stack->le_scanning_active = false; 4503 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4504 return true; 4505 } 4506 #endif 4507 4508 #ifdef ENABLE_LE_CENTRAL 4509 if (connecting_stop){ 4510 hci_send_cmd(&hci_le_create_connection_cancel); 4511 return true; 4512 } 4513 #endif 4514 4515 #ifdef ENABLE_LE_PERIPHERAL 4516 if (advertising_stop){ 4517 hci_stack->le_advertisements_active = false; 4518 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4519 return true; 4520 } 4521 #endif 4522 4523 // Phase 3: modify 4524 4525 if (random_address_change){ 4526 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4527 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4528 return true; 4529 } 4530 4531 #ifdef ENABLE_LE_CENTRAL 4532 if (hci_stack->le_scanning_param_update){ 4533 hci_stack->le_scanning_param_update = false; 4534 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4535 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4536 return true; 4537 } 4538 #endif 4539 4540 #ifdef ENABLE_LE_PERIPHERAL 4541 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4542 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4543 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4544 hci_send_cmd(&hci_le_set_advertising_parameters, 4545 hci_stack->le_advertisements_interval_min, 4546 hci_stack->le_advertisements_interval_max, 4547 hci_stack->le_advertisements_type, 4548 hci_stack->le_advertisements_own_addr_type, 4549 hci_stack->le_advertisements_direct_address_type, 4550 hci_stack->le_advertisements_direct_address, 4551 hci_stack->le_advertisements_channel_map, 4552 hci_stack->le_advertisements_filter_policy); 4553 return true; 4554 } 4555 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4556 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4557 uint8_t adv_data_clean[31]; 4558 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4559 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4560 hci_stack->le_advertisements_data_len); 4561 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4562 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4563 return true; 4564 } 4565 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4566 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4567 uint8_t scan_data_clean[31]; 4568 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4569 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4570 hci_stack->le_scan_response_data_len); 4571 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4572 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4573 return true; 4574 } 4575 #endif 4576 4577 4578 #ifdef ENABLE_LE_CENTRAL 4579 // if connect with whitelist was active and is not cancelled yet, wait until next time 4580 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4581 #endif 4582 4583 // LE Whitelist Management 4584 if (whitelist_modification_pending){ 4585 // add/remove entries 4586 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4587 while (btstack_linked_list_iterator_has_next(&lit)){ 4588 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4589 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4590 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4591 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4592 return true; 4593 } 4594 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4595 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4596 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4597 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4598 return true; 4599 } 4600 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4601 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4602 btstack_memory_whitelist_entry_free(entry); 4603 } 4604 } 4605 } 4606 4607 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4608 // LE Resolving List Management 4609 if (resolving_list_supported) { 4610 uint16_t i; 4611 switch (hci_stack->le_resolving_list_state) { 4612 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4613 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4614 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4615 return true; 4616 case LE_RESOLVING_LIST_READ_SIZE: 4617 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4618 hci_send_cmd(&hci_le_read_resolving_list_size); 4619 return true; 4620 case LE_RESOLVING_LIST_SEND_CLEAR: 4621 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4622 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4623 sizeof(hci_stack->le_resolving_list_add_entries)); 4624 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4625 sizeof(hci_stack->le_resolving_list_remove_entries)); 4626 hci_send_cmd(&hci_le_clear_resolving_list); 4627 return true; 4628 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4629 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4630 uint8_t offset = i >> 3; 4631 uint8_t mask = 1 << (i & 7); 4632 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4633 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4634 bd_addr_t peer_identity_addreses; 4635 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4636 sm_key_t peer_irk; 4637 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4638 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4639 4640 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4641 // trigger whitelist entry 'update' (work around for controller bug) 4642 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4643 while (btstack_linked_list_iterator_has_next(&lit)) { 4644 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4645 if (entry->address_type != peer_identity_addr_type) continue; 4646 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4647 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4648 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4649 } 4650 #endif 4651 4652 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4653 peer_identity_addreses); 4654 return true; 4655 } 4656 4657 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4658 4659 /* fall through */ 4660 4661 case LE_RESOLVING_LIST_ADD_ENTRIES: 4662 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4663 uint8_t offset = i >> 3; 4664 uint8_t mask = 1 << (i & 7); 4665 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4666 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4667 bd_addr_t peer_identity_addreses; 4668 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4669 sm_key_t peer_irk; 4670 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4671 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4672 const uint8_t *local_irk = gap_get_persistent_irk(); 4673 // command uses format specifier 'P' that stores 16-byte value without flip 4674 uint8_t local_irk_flipped[16]; 4675 uint8_t peer_irk_flipped[16]; 4676 reverse_128(local_irk, local_irk_flipped); 4677 reverse_128(peer_irk, peer_irk_flipped); 4678 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4679 peer_irk_flipped, local_irk_flipped); 4680 return true; 4681 } 4682 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4683 break; 4684 4685 default: 4686 break; 4687 } 4688 } 4689 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4690 #endif 4691 4692 // Phase 4: restore state 4693 4694 #ifdef ENABLE_LE_CENTRAL 4695 // re-start scanning 4696 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4697 hci_stack->le_scanning_active = true; 4698 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4699 return true; 4700 } 4701 #endif 4702 4703 #ifdef ENABLE_LE_CENTRAL 4704 // re-start connecting 4705 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4706 bd_addr_t null_addr; 4707 memset(null_addr, 0, 6); 4708 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4709 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4710 hci_send_cmd(&hci_le_create_connection, 4711 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4712 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4713 1, // use whitelist 4714 0, // peer address type 4715 null_addr, // peer bd addr 4716 hci_stack->le_connection_own_addr_type, // our addr type: 4717 hci_stack->le_connection_interval_min, // conn interval min 4718 hci_stack->le_connection_interval_max, // conn interval max 4719 hci_stack->le_connection_latency, // conn latency 4720 hci_stack->le_supervision_timeout, // conn latency 4721 hci_stack->le_minimum_ce_length, // min ce length 4722 hci_stack->le_maximum_ce_length // max ce length 4723 ); 4724 return true; 4725 } 4726 #endif 4727 4728 #ifdef ENABLE_LE_PERIPHERAL 4729 // re-start advertising 4730 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4731 // check if advertisements should be enabled given 4732 hci_stack->le_advertisements_active = true; 4733 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4734 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4735 return true; 4736 } 4737 #endif 4738 4739 return false; 4740 } 4741 #endif 4742 4743 static bool hci_run_general_pending_commands(void){ 4744 btstack_linked_item_t * it; 4745 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4746 hci_connection_t * connection = (hci_connection_t *) it; 4747 4748 switch(connection->state){ 4749 case SEND_CREATE_CONNECTION: 4750 switch(connection->address_type){ 4751 #ifdef ENABLE_CLASSIC 4752 case BD_ADDR_TYPE_ACL: 4753 log_info("sending hci_create_connection"); 4754 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4755 break; 4756 #endif 4757 default: 4758 #ifdef ENABLE_BLE 4759 #ifdef ENABLE_LE_CENTRAL 4760 log_info("sending hci_le_create_connection"); 4761 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4762 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4763 hci_send_cmd(&hci_le_create_connection, 4764 hci_stack->le_connection_scan_interval, // conn scan interval 4765 hci_stack->le_connection_scan_window, // conn scan windows 4766 0, // don't use whitelist 4767 connection->address_type, // peer address type 4768 connection->address, // peer bd addr 4769 hci_stack->le_connection_own_addr_type, // our addr type: 4770 hci_stack->le_connection_interval_min, // conn interval min 4771 hci_stack->le_connection_interval_max, // conn interval max 4772 hci_stack->le_connection_latency, // conn latency 4773 hci_stack->le_supervision_timeout, // conn latency 4774 hci_stack->le_minimum_ce_length, // min ce length 4775 hci_stack->le_maximum_ce_length // max ce length 4776 ); 4777 connection->state = SENT_CREATE_CONNECTION; 4778 #endif 4779 #endif 4780 break; 4781 } 4782 return true; 4783 4784 #ifdef ENABLE_CLASSIC 4785 case RECEIVED_CONNECTION_REQUEST: 4786 connection->role = HCI_ROLE_SLAVE; 4787 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4788 log_info("sending hci_accept_connection_request"); 4789 connection->state = ACCEPTED_CONNECTION_REQUEST; 4790 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4791 } 4792 return true; 4793 #endif 4794 4795 #ifdef ENABLE_BLE 4796 #ifdef ENABLE_LE_CENTRAL 4797 case SEND_CANCEL_CONNECTION: 4798 connection->state = SENT_CANCEL_CONNECTION; 4799 hci_send_cmd(&hci_le_create_connection_cancel); 4800 return true; 4801 #endif 4802 #endif 4803 case SEND_DISCONNECT: 4804 connection->state = SENT_DISCONNECT; 4805 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4806 return true; 4807 4808 default: 4809 break; 4810 } 4811 4812 // no further commands if connection is about to get shut down 4813 if (connection->state == SENT_DISCONNECT) continue; 4814 4815 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4816 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4817 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4818 return true; 4819 } 4820 4821 #ifdef ENABLE_CLASSIC 4822 4823 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4824 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4825 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4826 return true; 4827 } 4828 4829 // Handling link key request requires remote supported features 4830 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4831 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4832 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4833 4834 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4835 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4836 if (have_link_key && security_level_sufficient){ 4837 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4838 } else { 4839 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4840 } 4841 return true; 4842 } 4843 4844 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4845 log_info("denying to pin request"); 4846 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4847 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4848 return true; 4849 } 4850 4851 // security assessment requires remote features 4852 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4853 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4854 hci_ssp_assess_security_on_io_cap_request(connection); 4855 // 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 4856 } 4857 4858 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4859 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4860 // set authentication requirements: 4861 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4862 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4863 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4864 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4865 authreq |= 1; 4866 } 4867 bool bonding = hci_stack->bondable; 4868 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4869 // if we have received IO Cap Response, we're in responder role 4870 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4871 if (bonding && !remote_bonding){ 4872 log_info("Remote not bonding, dropping local flag"); 4873 bonding = false; 4874 } 4875 } 4876 if (bonding){ 4877 if (connection->bonding_flags & BONDING_DEDICATED){ 4878 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4879 } else { 4880 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4881 } 4882 } 4883 uint8_t have_oob_data = 0; 4884 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4885 if (connection->classic_oob_c_192 != NULL){ 4886 have_oob_data |= 1; 4887 } 4888 if (connection->classic_oob_c_256 != NULL){ 4889 have_oob_data |= 2; 4890 } 4891 #endif 4892 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4893 return true; 4894 } 4895 4896 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4897 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4898 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4899 return true; 4900 } 4901 4902 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4903 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4904 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4905 const uint8_t zero[16] = { 0 }; 4906 const uint8_t * r_192 = zero; 4907 const uint8_t * c_192 = zero; 4908 const uint8_t * r_256 = zero; 4909 const uint8_t * c_256 = zero; 4910 // verify P-256 OOB 4911 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4912 c_256 = connection->classic_oob_c_256; 4913 if (connection->classic_oob_r_256 != NULL) { 4914 r_256 = connection->classic_oob_r_256; 4915 } 4916 } 4917 // verify P-192 OOB 4918 if ((connection->classic_oob_c_192 != NULL)) { 4919 c_192 = connection->classic_oob_c_192; 4920 if (connection->classic_oob_r_192 != NULL) { 4921 r_192 = connection->classic_oob_r_192; 4922 } 4923 } 4924 4925 // assess security 4926 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4927 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4928 if (need_level_4 && !can_reach_level_4){ 4929 log_info("Level 4 required, but not possible -> abort"); 4930 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4931 // send oob negative reply 4932 c_256 = NULL; 4933 c_192 = NULL; 4934 } 4935 4936 // Reply 4937 if (c_256 != zero) { 4938 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4939 } else if (c_192 != zero){ 4940 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4941 } else { 4942 hci_stack->classic_oob_con_handle = connection->con_handle; 4943 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4944 } 4945 return true; 4946 } 4947 #endif 4948 4949 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4950 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4951 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4952 return true; 4953 } 4954 4955 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4956 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4957 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4958 return true; 4959 } 4960 4961 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4962 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4963 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4964 return true; 4965 } 4966 4967 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4968 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4969 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4970 connection->state = SENT_DISCONNECT; 4971 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4972 return true; 4973 } 4974 4975 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4976 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4977 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4978 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4979 return true; 4980 } 4981 4982 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4983 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4984 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4985 return true; 4986 } 4987 4988 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4989 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4990 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4991 return true; 4992 } 4993 4994 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4995 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4996 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4997 return true; 4998 } 4999 5000 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5001 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5002 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5003 return true; 5004 } 5005 5006 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5007 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5008 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5009 return true; 5010 } 5011 #endif 5012 5013 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5014 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5015 #ifdef ENABLE_CLASSIC 5016 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5017 #endif 5018 if (connection->state != SENT_DISCONNECT){ 5019 connection->state = SENT_DISCONNECT; 5020 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5021 return true; 5022 } 5023 } 5024 5025 #ifdef ENABLE_CLASSIC 5026 uint16_t sniff_min_interval; 5027 switch (connection->sniff_min_interval){ 5028 case 0: 5029 break; 5030 case 0xffff: 5031 connection->sniff_min_interval = 0; 5032 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5033 return true; 5034 default: 5035 sniff_min_interval = connection->sniff_min_interval; 5036 connection->sniff_min_interval = 0; 5037 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5038 return true; 5039 } 5040 5041 if (connection->sniff_subrating_max_latency != 0xffff){ 5042 uint16_t max_latency = connection->sniff_subrating_max_latency; 5043 connection->sniff_subrating_max_latency = 0; 5044 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5045 return true; 5046 } 5047 5048 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5049 uint8_t service_type = (uint8_t) connection->qos_service_type; 5050 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5051 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); 5052 return true; 5053 } 5054 5055 if (connection->request_role != HCI_ROLE_INVALID){ 5056 hci_role_t role = connection->request_role; 5057 connection->request_role = HCI_ROLE_INVALID; 5058 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5059 return true; 5060 } 5061 #endif 5062 5063 #ifdef ENABLE_BLE 5064 switch (connection->le_con_parameter_update_state){ 5065 // response to L2CAP CON PARAMETER UPDATE REQUEST 5066 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5067 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5068 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5069 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5070 0x0000, 0xffff); 5071 return true; 5072 case CON_PARAMETER_UPDATE_REPLY: 5073 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5074 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5075 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5076 0x0000, 0xffff); 5077 return true; 5078 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5079 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5080 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5081 return true; 5082 default: 5083 break; 5084 } 5085 if (connection->le_phy_update_all_phys != 0xffu){ 5086 uint8_t all_phys = connection->le_phy_update_all_phys; 5087 connection->le_phy_update_all_phys = 0xff; 5088 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); 5089 return true; 5090 } 5091 #endif 5092 } 5093 return false; 5094 } 5095 5096 static void hci_run(void){ 5097 5098 // stack state sub statemachines 5099 // halting needs to be called even if we cannot send command packet now 5100 switch (hci_stack->state) { 5101 case HCI_STATE_INITIALIZING: 5102 hci_initializing_run(); 5103 break; 5104 case HCI_STATE_HALTING: 5105 hci_halting_run(); 5106 break; 5107 case HCI_STATE_FALLING_ASLEEP: 5108 hci_falling_asleep_run(); 5109 break; 5110 default: 5111 break; 5112 } 5113 5114 bool done; 5115 5116 // send continuation fragments first, as they block the prepared packet buffer 5117 done = hci_run_acl_fragments(); 5118 if (done) return; 5119 5120 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5121 // send host num completed packets next as they don't require num_cmd_packets > 0 5122 if (!hci_can_send_comand_packet_transport()) return; 5123 if (hci_stack->host_completed_packets){ 5124 hci_host_num_completed_packets(); 5125 return; 5126 } 5127 #endif 5128 5129 if (!hci_can_send_command_packet_now()) return; 5130 5131 // global/non-connection oriented commands 5132 5133 5134 #ifdef ENABLE_CLASSIC 5135 // general gap classic 5136 done = hci_run_general_gap_classic(); 5137 if (done) return; 5138 #endif 5139 5140 #ifdef ENABLE_BLE 5141 // general gap le 5142 done = hci_run_general_gap_le(); 5143 if (done) return; 5144 #endif 5145 5146 // send pending HCI commands 5147 hci_run_general_pending_commands(); 5148 } 5149 5150 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5151 // house-keeping 5152 5153 #ifdef ENABLE_CLASSIC 5154 bd_addr_t addr; 5155 hci_connection_t * conn; 5156 #endif 5157 #ifdef ENABLE_LE_CENTRAL 5158 uint8_t initiator_filter_policy; 5159 #endif 5160 5161 uint16_t opcode = little_endian_read_16(packet, 0); 5162 switch (opcode) { 5163 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5164 hci_stack->loopback_mode = packet[3]; 5165 break; 5166 5167 #ifdef ENABLE_CLASSIC 5168 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5169 reverse_bd_addr(&packet[3], addr); 5170 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5171 5172 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5173 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5174 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5175 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5176 } 5177 5178 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5179 if (!conn) { 5180 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5181 if (!conn) { 5182 // notify client that alloc failed 5183 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5184 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5185 } 5186 conn->state = SEND_CREATE_CONNECTION; 5187 conn->role = HCI_ROLE_MASTER; 5188 } 5189 5190 conn->con_handle = HCI_CON_HANDLE_INVALID; 5191 conn->role = HCI_ROLE_INVALID; 5192 5193 log_info("conn state %u", conn->state); 5194 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5195 switch (conn->state) { 5196 // if connection active exists 5197 case OPEN: 5198 // and OPEN, emit connection complete command 5199 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5200 // packet not sent to controller 5201 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5202 case RECEIVED_DISCONNECTION_COMPLETE: 5203 // create connection triggered in disconnect complete event, let's do it now 5204 break; 5205 case SEND_CREATE_CONNECTION: 5206 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5207 break; 5208 default: 5209 // otherwise, just ignore as it is already in the open process 5210 // packet not sent to controller 5211 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5212 } 5213 conn->state = SENT_CREATE_CONNECTION; 5214 5215 // track outgoing connection 5216 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5217 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5218 break; 5219 5220 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5221 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5222 // setup_synchronous_connection? Voice setting at offset 22 5223 // TODO: compare to current setting if sco connection already active 5224 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5225 break; 5226 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5227 // accept_synchronous_connection? Voice setting at offset 18 5228 // TODO: compare to current setting if sco connection already active 5229 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5230 break; 5231 #endif 5232 #endif 5233 5234 #ifdef ENABLE_BLE 5235 #ifdef ENABLE_LE_CENTRAL 5236 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5237 // white list used? 5238 initiator_filter_policy = packet[7]; 5239 switch (initiator_filter_policy) { 5240 case 0: 5241 // whitelist not used 5242 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5243 break; 5244 case 1: 5245 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5246 break; 5247 default: 5248 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5249 break; 5250 } 5251 // track outgoing connection 5252 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5253 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5254 break; 5255 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5256 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5257 break; 5258 #endif 5259 #endif 5260 default: 5261 break; 5262 } 5263 5264 hci_stack->num_cmd_packets--; 5265 5266 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5267 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5268 if (err != 0){ 5269 return ERROR_CODE_HARDWARE_FAILURE; 5270 } 5271 return ERROR_CODE_SUCCESS; 5272 } 5273 5274 // disconnect because of security block 5275 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5276 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5277 if (!connection) return; 5278 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5279 } 5280 5281 5282 // Configure Secure Simple Pairing 5283 5284 #ifdef ENABLE_CLASSIC 5285 5286 // enable will enable SSP during init 5287 void gap_ssp_set_enable(int enable){ 5288 hci_stack->ssp_enable = enable; 5289 } 5290 5291 static int hci_local_ssp_activated(void){ 5292 return gap_ssp_supported() && hci_stack->ssp_enable; 5293 } 5294 5295 // if set, BTstack will respond to io capability request using authentication requirement 5296 void gap_ssp_set_io_capability(int io_capability){ 5297 hci_stack->ssp_io_capability = io_capability; 5298 } 5299 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5300 hci_stack->ssp_authentication_requirement = authentication_requirement; 5301 } 5302 5303 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5304 void gap_ssp_set_auto_accept(int auto_accept){ 5305 hci_stack->ssp_auto_accept = auto_accept; 5306 } 5307 5308 void gap_secure_connections_enable(bool enable){ 5309 hci_stack->secure_connections_enable = enable; 5310 } 5311 5312 #endif 5313 5314 // va_list part of hci_send_cmd 5315 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5316 if (!hci_can_send_command_packet_now()){ 5317 log_error("hci_send_cmd called but cannot send packet now"); 5318 return ERROR_CODE_COMMAND_DISALLOWED; 5319 } 5320 5321 // for HCI INITIALIZATION 5322 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5323 hci_stack->last_cmd_opcode = cmd->opcode; 5324 5325 hci_reserve_packet_buffer(); 5326 uint8_t * packet = hci_stack->hci_packet_buffer; 5327 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5328 uint8_t status = hci_send_cmd_packet(packet, size); 5329 5330 // release packet buffer on error or for synchronous transport implementations 5331 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5332 hci_release_packet_buffer(); 5333 hci_emit_transport_packet_sent(); 5334 } 5335 5336 return status; 5337 } 5338 5339 /** 5340 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5341 */ 5342 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5343 va_list argptr; 5344 va_start(argptr, cmd); 5345 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5346 va_end(argptr); 5347 return status; 5348 } 5349 5350 // Create various non-HCI events. 5351 // TODO: generalize, use table similar to hci_create_command 5352 5353 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5354 // dump packet 5355 if (dump) { 5356 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5357 } 5358 5359 // dispatch to all event handlers 5360 btstack_linked_list_iterator_t it; 5361 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5362 while (btstack_linked_list_iterator_has_next(&it)){ 5363 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5364 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5365 } 5366 } 5367 5368 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5369 if (!hci_stack->acl_packet_handler) return; 5370 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5371 } 5372 5373 #ifdef ENABLE_CLASSIC 5374 static void hci_notify_if_sco_can_send_now(void){ 5375 // notify SCO sender if waiting 5376 if (!hci_stack->sco_waiting_for_can_send_now) return; 5377 if (hci_can_send_sco_packet_now()){ 5378 hci_stack->sco_waiting_for_can_send_now = 0; 5379 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5380 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5381 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5382 } 5383 } 5384 5385 // parsing end emitting has been merged to reduce code size 5386 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5387 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5388 5389 uint8_t * eir_data; 5390 ad_context_t context; 5391 const uint8_t * name; 5392 uint8_t name_len; 5393 5394 if (size < 3) return; 5395 5396 int event_type = hci_event_packet_get_type(packet); 5397 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5398 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5399 5400 switch (event_type){ 5401 case HCI_EVENT_INQUIRY_RESULT: 5402 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5403 if (size != (3 + (num_responses * 14))) return; 5404 break; 5405 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5406 if (size != 257) return; 5407 if (num_responses != 1) return; 5408 break; 5409 default: 5410 return; 5411 } 5412 5413 // event[1] is set at the end 5414 int i; 5415 for (i=0; i<num_responses;i++){ 5416 memset(event, 0, sizeof(event)); 5417 event[0] = GAP_EVENT_INQUIRY_RESULT; 5418 uint8_t event_size = 27; // if name is not set by EIR 5419 5420 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5421 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5422 (void)memcpy(&event[9], 5423 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5424 3); // class of device 5425 (void)memcpy(&event[12], 5426 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5427 2); // clock offset 5428 5429 switch (event_type){ 5430 case HCI_EVENT_INQUIRY_RESULT: 5431 // 14,15,16,17 = 0, size 18 5432 break; 5433 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5434 event[14] = 1; 5435 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5436 // 16,17 = 0, size 18 5437 break; 5438 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5439 event[14] = 1; 5440 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5441 // EIR packets only contain a single inquiry response 5442 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5443 name = NULL; 5444 // Iterate over EIR data 5445 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5446 uint8_t data_type = ad_iterator_get_data_type(&context); 5447 uint8_t data_size = ad_iterator_get_data_len(&context); 5448 const uint8_t * data = ad_iterator_get_data(&context); 5449 // Prefer Complete Local Name over Shortened Local Name 5450 switch (data_type){ 5451 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5452 if (name) continue; 5453 /* fall through */ 5454 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5455 name = data; 5456 name_len = data_size; 5457 break; 5458 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5459 if (data_size != 8) break; 5460 event[16] = 1; 5461 memcpy(&event[17], data, 8); 5462 break; 5463 default: 5464 break; 5465 } 5466 } 5467 if (name){ 5468 event[25] = 1; 5469 // truncate name if needed 5470 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5471 event[26] = len; 5472 (void)memcpy(&event[27], name, len); 5473 event_size += len; 5474 } 5475 break; 5476 default: 5477 return; 5478 } 5479 event[1] = event_size - 2; 5480 hci_emit_event(event, event_size, 1); 5481 } 5482 } 5483 #endif 5484 5485 void hci_emit_state(void){ 5486 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5487 uint8_t event[3]; 5488 event[0] = BTSTACK_EVENT_STATE; 5489 event[1] = sizeof(event) - 2u; 5490 event[2] = hci_stack->state; 5491 hci_emit_event(event, sizeof(event), 1); 5492 } 5493 5494 #ifdef ENABLE_CLASSIC 5495 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5496 uint8_t event[13]; 5497 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5498 event[1] = sizeof(event) - 2; 5499 event[2] = status; 5500 little_endian_store_16(event, 3, con_handle); 5501 reverse_bd_addr(address, &event[5]); 5502 event[11] = 1; // ACL connection 5503 event[12] = 0; // encryption disabled 5504 hci_emit_event(event, sizeof(event), 1); 5505 } 5506 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5507 if (disable_l2cap_timeouts) return; 5508 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5509 uint8_t event[4]; 5510 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5511 event[1] = sizeof(event) - 2; 5512 little_endian_store_16(event, 2, conn->con_handle); 5513 hci_emit_event(event, sizeof(event), 1); 5514 } 5515 #endif 5516 5517 #ifdef ENABLE_BLE 5518 #ifdef ENABLE_LE_CENTRAL 5519 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){ 5520 uint8_t event[21]; 5521 event[0] = HCI_EVENT_LE_META; 5522 event[1] = sizeof(event) - 2u; 5523 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5524 event[3] = status; 5525 little_endian_store_16(event, 4, con_handle); 5526 event[6] = 0; // TODO: role 5527 event[7] = address_type; 5528 reverse_bd_addr(address, &event[8]); 5529 little_endian_store_16(event, 14, 0); // interval 5530 little_endian_store_16(event, 16, 0); // latency 5531 little_endian_store_16(event, 18, 0); // supervision timeout 5532 event[20] = 0; // master clock accuracy 5533 hci_emit_event(event, sizeof(event), 1); 5534 } 5535 #endif 5536 #endif 5537 5538 static void hci_emit_transport_packet_sent(void){ 5539 // notify upper stack that it might be possible to send again 5540 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5541 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5542 } 5543 5544 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5545 uint8_t event[6]; 5546 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5547 event[1] = sizeof(event) - 2u; 5548 event[2] = 0; // status = OK 5549 little_endian_store_16(event, 3, con_handle); 5550 event[5] = reason; 5551 hci_emit_event(event, sizeof(event), 1); 5552 } 5553 5554 static void hci_emit_nr_connections_changed(void){ 5555 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5556 uint8_t event[3]; 5557 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5558 event[1] = sizeof(event) - 2u; 5559 event[2] = nr_hci_connections(); 5560 hci_emit_event(event, sizeof(event), 1); 5561 } 5562 5563 static void hci_emit_hci_open_failed(void){ 5564 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5565 uint8_t event[2]; 5566 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5567 event[1] = sizeof(event) - 2u; 5568 hci_emit_event(event, sizeof(event), 1); 5569 } 5570 5571 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5572 log_info("hci_emit_dedicated_bonding_result %u ", status); 5573 uint8_t event[9]; 5574 int pos = 0; 5575 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5576 event[pos++] = sizeof(event) - 2u; 5577 event[pos++] = status; 5578 reverse_bd_addr(address, &event[pos]); 5579 hci_emit_event(event, sizeof(event), 1); 5580 } 5581 5582 5583 #ifdef ENABLE_CLASSIC 5584 5585 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5586 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5587 uint8_t event[5]; 5588 int pos = 0; 5589 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5590 event[pos++] = sizeof(event) - 2; 5591 little_endian_store_16(event, 2, con_handle); 5592 pos += 2; 5593 event[pos++] = level; 5594 hci_emit_event(event, sizeof(event), 1); 5595 } 5596 5597 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5598 if (!connection) return LEVEL_0; 5599 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5600 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5601 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5602 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5603 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5604 // LEVEL 4 always requires 128 bit encrytion key size 5605 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5606 security_level = LEVEL_3; 5607 } 5608 return security_level; 5609 } 5610 5611 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5612 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5613 uint8_t event[3]; 5614 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5615 event[1] = sizeof(event) - 2; 5616 event[2] = enabled; 5617 hci_emit_event(event, sizeof(event), 1); 5618 } 5619 5620 // query if remote side supports eSCO 5621 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5622 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5623 if (!connection) return false; 5624 return (connection->remote_supported_features[0] & 1) != 0; 5625 } 5626 5627 static bool hci_ssp_supported(hci_connection_t * connection){ 5628 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5629 return (connection->bonding_flags & mask) == mask; 5630 } 5631 5632 // query if remote side supports SSP 5633 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5634 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5635 if (!connection) return false; 5636 return hci_ssp_supported(connection) ? 1 : 0; 5637 } 5638 5639 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5640 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5641 } 5642 5643 /** 5644 * Check if remote supported features query has completed 5645 */ 5646 bool hci_remote_features_available(hci_con_handle_t handle){ 5647 hci_connection_t * connection = hci_connection_for_handle(handle); 5648 if (!connection) return false; 5649 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5650 } 5651 5652 /** 5653 * Trigger remote supported features query 5654 */ 5655 5656 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5657 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5658 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5659 } 5660 } 5661 5662 void hci_remote_features_query(hci_con_handle_t con_handle){ 5663 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5664 if (!connection) return; 5665 hci_trigger_remote_features_for_connection(connection); 5666 hci_run(); 5667 } 5668 5669 // GAP API 5670 /** 5671 * @bbrief enable/disable bonding. default is enabled 5672 * @praram enabled 5673 */ 5674 void gap_set_bondable_mode(int enable){ 5675 hci_stack->bondable = enable ? 1 : 0; 5676 } 5677 /** 5678 * @brief Get bondable mode. 5679 * @return 1 if bondable 5680 */ 5681 int gap_get_bondable_mode(void){ 5682 return hci_stack->bondable; 5683 } 5684 5685 /** 5686 * @brief map link keys to security levels 5687 */ 5688 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5689 switch (link_key_type){ 5690 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5691 return LEVEL_4; 5692 case COMBINATION_KEY: 5693 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5694 return LEVEL_3; 5695 default: 5696 return LEVEL_2; 5697 } 5698 } 5699 5700 /** 5701 * @brief map link keys to secure connection yes/no 5702 */ 5703 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5704 switch (link_key_type){ 5705 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5706 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5707 return 1; 5708 default: 5709 return 0; 5710 } 5711 } 5712 5713 /** 5714 * @brief map link keys to authenticated 5715 */ 5716 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5717 switch (link_key_type){ 5718 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5719 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5720 return 1; 5721 default: 5722 return 0; 5723 } 5724 } 5725 5726 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5727 log_info("gap_mitm_protection_required_for_security_level %u", level); 5728 return level > LEVEL_2; 5729 } 5730 5731 /** 5732 * @brief get current security level 5733 */ 5734 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5735 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5736 if (!connection) return LEVEL_0; 5737 return gap_security_level_for_connection(connection); 5738 } 5739 5740 /** 5741 * @brief request connection to device to 5742 * @result GAP_AUTHENTICATION_RESULT 5743 */ 5744 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5745 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5746 if (!connection){ 5747 hci_emit_security_level(con_handle, LEVEL_0); 5748 return; 5749 } 5750 5751 btstack_assert(hci_is_le_connection(connection) == false); 5752 5753 // 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) 5754 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5755 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5756 requested_level = LEVEL_4; 5757 } 5758 5759 gap_security_level_t current_level = gap_security_level(con_handle); 5760 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5761 requested_level, connection->requested_security_level, current_level); 5762 5763 // authentication active if authentication request was sent or planned level > 0 5764 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5765 if (authentication_active){ 5766 // authentication already active 5767 if (connection->requested_security_level < requested_level){ 5768 // increase requested level as new level is higher 5769 // TODO: handle re-authentication when done 5770 connection->requested_security_level = requested_level; 5771 } 5772 } else { 5773 // no request active, notify if security sufficient 5774 if (requested_level <= current_level){ 5775 hci_emit_security_level(con_handle, current_level); 5776 return; 5777 } 5778 5779 // store request 5780 connection->requested_security_level = requested_level; 5781 5782 // request remote features if not already active 5783 hci_remote_features_query(con_handle); 5784 5785 // start to authenticate connection 5786 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5787 hci_run(); 5788 } 5789 } 5790 5791 /** 5792 * @brief start dedicated bonding with device. disconnect after bonding 5793 * @param device 5794 * @param request MITM protection 5795 * @result GAP_DEDICATED_BONDING_COMPLETE 5796 */ 5797 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5798 5799 // create connection state machine 5800 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5801 5802 if (!connection){ 5803 return BTSTACK_MEMORY_ALLOC_FAILED; 5804 } 5805 5806 // delete linkn key 5807 gap_drop_link_key_for_bd_addr(device); 5808 5809 // configure LEVEL_2/3, dedicated bonding 5810 connection->state = SEND_CREATE_CONNECTION; 5811 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5812 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5813 connection->bonding_flags = BONDING_DEDICATED; 5814 5815 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5816 5817 // handle: connnection failure (connection complete != ok) 5818 // handle: authentication failure 5819 // handle: disconnect on done 5820 5821 hci_run(); 5822 5823 return 0; 5824 } 5825 5826 void gap_set_local_name(const char * local_name){ 5827 hci_stack->local_name = local_name; 5828 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5829 // also update EIR if not set by user 5830 if (hci_stack->eir_data == NULL){ 5831 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5832 } 5833 hci_run(); 5834 } 5835 #endif 5836 5837 5838 #ifdef ENABLE_BLE 5839 5840 #ifdef ENABLE_LE_CENTRAL 5841 void gap_start_scan(void){ 5842 hci_stack->le_scanning_enabled = true; 5843 hci_run(); 5844 } 5845 5846 void gap_stop_scan(void){ 5847 hci_stack->le_scanning_enabled = false; 5848 hci_run(); 5849 } 5850 5851 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5852 hci_stack->le_scan_type = scan_type; 5853 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5854 hci_stack->le_scan_interval = scan_interval; 5855 hci_stack->le_scan_window = scan_window; 5856 hci_stack->le_scanning_param_update = true; 5857 hci_run(); 5858 } 5859 5860 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5861 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5862 } 5863 5864 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5865 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5866 if (!conn){ 5867 // disallow if le connection is already outgoing 5868 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5869 log_error("le connection already active"); 5870 return ERROR_CODE_COMMAND_DISALLOWED; 5871 } 5872 5873 log_info("gap_connect: no connection exists yet, creating context"); 5874 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5875 if (!conn){ 5876 // notify client that alloc failed 5877 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5878 log_info("gap_connect: failed to alloc hci_connection_t"); 5879 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5880 } 5881 5882 // set le connecting state 5883 if (hci_is_le_connection_type(addr_type)){ 5884 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5885 } 5886 5887 conn->state = SEND_CREATE_CONNECTION; 5888 log_info("gap_connect: send create connection next"); 5889 hci_run(); 5890 return ERROR_CODE_SUCCESS; 5891 } 5892 5893 if (!hci_is_le_connection(conn) || 5894 (conn->state == SEND_CREATE_CONNECTION) || 5895 (conn->state == SENT_CREATE_CONNECTION)) { 5896 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5897 log_error("gap_connect: classic connection or connect is already being created"); 5898 return GATT_CLIENT_IN_WRONG_STATE; 5899 } 5900 5901 // check if connection was just disconnected 5902 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5903 log_info("gap_connect: send create connection (again)"); 5904 conn->state = SEND_CREATE_CONNECTION; 5905 hci_run(); 5906 return ERROR_CODE_SUCCESS; 5907 } 5908 5909 log_info("gap_connect: context exists with state %u", conn->state); 5910 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5911 hci_run(); 5912 return ERROR_CODE_SUCCESS; 5913 } 5914 5915 // @assumption: only a single outgoing LE Connection exists 5916 static hci_connection_t * gap_get_outgoing_connection(void){ 5917 btstack_linked_item_t *it; 5918 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5919 hci_connection_t * conn = (hci_connection_t *) it; 5920 if (!hci_is_le_connection(conn)) continue; 5921 switch (conn->state){ 5922 case SEND_CREATE_CONNECTION: 5923 case SENT_CREATE_CONNECTION: 5924 case SENT_CANCEL_CONNECTION: 5925 return conn; 5926 default: 5927 break; 5928 }; 5929 } 5930 return NULL; 5931 } 5932 5933 uint8_t gap_connect_cancel(void){ 5934 hci_connection_t * conn = gap_get_outgoing_connection(); 5935 if (!conn) return 0; 5936 switch (conn->state){ 5937 case SEND_CREATE_CONNECTION: 5938 // skip sending create connection and emit event instead 5939 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5940 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5941 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5942 btstack_memory_hci_connection_free( conn ); 5943 break; 5944 case SENT_CREATE_CONNECTION: 5945 // request to send cancel connection 5946 conn->state = SEND_CANCEL_CONNECTION; 5947 hci_run(); 5948 break; 5949 default: 5950 break; 5951 } 5952 return 0; 5953 } 5954 #endif 5955 5956 #ifdef ENABLE_LE_CENTRAL 5957 /** 5958 * @brief Set connection parameters for outgoing connections 5959 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5960 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5961 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5962 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5963 * @param conn_latency, default: 4 5964 * @param supervision_timeout (unit: 10ms), default: 720 ms 5965 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5966 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5967 */ 5968 5969 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5970 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5971 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5972 hci_stack->le_connection_scan_interval = conn_scan_interval; 5973 hci_stack->le_connection_scan_window = conn_scan_window; 5974 hci_stack->le_connection_interval_min = conn_interval_min; 5975 hci_stack->le_connection_interval_max = conn_interval_max; 5976 hci_stack->le_connection_latency = conn_latency; 5977 hci_stack->le_supervision_timeout = supervision_timeout; 5978 hci_stack->le_minimum_ce_length = min_ce_length; 5979 hci_stack->le_maximum_ce_length = max_ce_length; 5980 } 5981 #endif 5982 5983 /** 5984 * @brief Updates the connection parameters for a given LE connection 5985 * @param handle 5986 * @param conn_interval_min (unit: 1.25ms) 5987 * @param conn_interval_max (unit: 1.25ms) 5988 * @param conn_latency 5989 * @param supervision_timeout (unit: 10ms) 5990 * @return 0 if ok 5991 */ 5992 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5993 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5994 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5995 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5996 connection->le_conn_interval_min = conn_interval_min; 5997 connection->le_conn_interval_max = conn_interval_max; 5998 connection->le_conn_latency = conn_latency; 5999 connection->le_supervision_timeout = supervision_timeout; 6000 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6001 hci_run(); 6002 return 0; 6003 } 6004 6005 /** 6006 * @brief Request an update of the connection parameter for a given LE connection 6007 * @param handle 6008 * @param conn_interval_min (unit: 1.25ms) 6009 * @param conn_interval_max (unit: 1.25ms) 6010 * @param conn_latency 6011 * @param supervision_timeout (unit: 10ms) 6012 * @return 0 if ok 6013 */ 6014 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6015 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6016 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6017 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6018 connection->le_conn_interval_min = conn_interval_min; 6019 connection->le_conn_interval_max = conn_interval_max; 6020 connection->le_conn_latency = conn_latency; 6021 connection->le_supervision_timeout = supervision_timeout; 6022 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6023 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6024 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6025 return 0; 6026 } 6027 6028 #ifdef ENABLE_LE_PERIPHERAL 6029 6030 /** 6031 * @brief Set Advertisement Data 6032 * @param advertising_data_length 6033 * @param advertising_data (max 31 octets) 6034 * @note data is not copied, pointer has to stay valid 6035 */ 6036 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6037 hci_stack->le_advertisements_data_len = advertising_data_length; 6038 hci_stack->le_advertisements_data = advertising_data; 6039 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6040 hci_run(); 6041 } 6042 6043 /** 6044 * @brief Set Scan Response Data 6045 * @param advertising_data_length 6046 * @param advertising_data (max 31 octets) 6047 * @note data is not copied, pointer has to stay valid 6048 */ 6049 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6050 hci_stack->le_scan_response_data_len = scan_response_data_length; 6051 hci_stack->le_scan_response_data = scan_response_data; 6052 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6053 hci_run(); 6054 } 6055 6056 /** 6057 * @brief Set Advertisement Parameters 6058 * @param adv_int_min 6059 * @param adv_int_max 6060 * @param adv_type 6061 * @param direct_address_type 6062 * @param direct_address 6063 * @param channel_map 6064 * @param filter_policy 6065 * 6066 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6067 */ 6068 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6069 uint8_t direct_address_typ, bd_addr_t direct_address, 6070 uint8_t channel_map, uint8_t filter_policy) { 6071 6072 hci_stack->le_advertisements_interval_min = adv_int_min; 6073 hci_stack->le_advertisements_interval_max = adv_int_max; 6074 hci_stack->le_advertisements_type = adv_type; 6075 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6076 hci_stack->le_advertisements_channel_map = channel_map; 6077 hci_stack->le_advertisements_filter_policy = filter_policy; 6078 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6079 6); 6080 6081 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6082 hci_run(); 6083 } 6084 6085 /** 6086 * @brief Enable/Disable Advertisements 6087 * @param enabled 6088 */ 6089 void gap_advertisements_enable(int enabled){ 6090 hci_stack->le_advertisements_enabled = enabled != 0; 6091 hci_update_advertisements_enabled_for_current_roles(); 6092 hci_run(); 6093 } 6094 6095 #endif 6096 6097 void hci_le_set_own_address_type(uint8_t own_address_type){ 6098 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6099 if (own_address_type == hci_stack->le_own_addr_type) return; 6100 hci_stack->le_own_addr_type = own_address_type; 6101 6102 #ifdef ENABLE_LE_PERIPHERAL 6103 // update advertisement parameters, too 6104 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6105 hci_run(); 6106 #endif 6107 #ifdef ENABLE_LE_CENTRAL 6108 // note: we don't update scan parameters or modify ongoing connection attempts 6109 #endif 6110 } 6111 6112 void hci_le_random_address_set(const bd_addr_t random_address){ 6113 memcpy(hci_stack->le_random_address, random_address, 6); 6114 hci_stack->le_random_address_set = true; 6115 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6116 hci_run(); 6117 } 6118 6119 #endif 6120 6121 uint8_t gap_disconnect(hci_con_handle_t handle){ 6122 hci_connection_t * conn = hci_connection_for_handle(handle); 6123 if (!conn){ 6124 hci_emit_disconnection_complete(handle, 0); 6125 return 0; 6126 } 6127 // ignore if already disconnected 6128 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6129 return 0; 6130 } 6131 conn->state = SEND_DISCONNECT; 6132 hci_run(); 6133 return 0; 6134 } 6135 6136 int gap_read_rssi(hci_con_handle_t con_handle){ 6137 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6138 if (hci_connection == NULL) return 0; 6139 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6140 hci_run(); 6141 return 1; 6142 } 6143 6144 /** 6145 * @brief Get connection type 6146 * @param con_handle 6147 * @result connection_type 6148 */ 6149 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6150 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6151 if (!conn) return GAP_CONNECTION_INVALID; 6152 switch (conn->address_type){ 6153 case BD_ADDR_TYPE_LE_PUBLIC: 6154 case BD_ADDR_TYPE_LE_RANDOM: 6155 return GAP_CONNECTION_LE; 6156 case BD_ADDR_TYPE_SCO: 6157 return GAP_CONNECTION_SCO; 6158 case BD_ADDR_TYPE_ACL: 6159 return GAP_CONNECTION_ACL; 6160 default: 6161 return GAP_CONNECTION_INVALID; 6162 } 6163 } 6164 6165 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6166 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6167 if (!conn) return HCI_ROLE_INVALID; 6168 return (hci_role_t) conn->role; 6169 } 6170 6171 6172 #ifdef ENABLE_CLASSIC 6173 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6174 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6175 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6176 conn->request_role = role; 6177 hci_run(); 6178 return ERROR_CODE_SUCCESS; 6179 } 6180 #endif 6181 6182 #ifdef ENABLE_BLE 6183 6184 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){ 6185 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6186 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6187 6188 conn->le_phy_update_all_phys = all_phys; 6189 conn->le_phy_update_tx_phys = tx_phys; 6190 conn->le_phy_update_rx_phys = rx_phys; 6191 conn->le_phy_update_phy_options = phy_options; 6192 6193 hci_run(); 6194 6195 return 0; 6196 } 6197 6198 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6199 // check if already in list 6200 btstack_linked_list_iterator_t it; 6201 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6202 while (btstack_linked_list_iterator_has_next(&it)) { 6203 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6204 if (entry->address_type != address_type) { 6205 continue; 6206 } 6207 if (memcmp(entry->address, address, 6) != 0) { 6208 continue; 6209 } 6210 // disallow if already scheduled to add 6211 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6212 return ERROR_CODE_COMMAND_DISALLOWED; 6213 } 6214 // still on controller, but scheduled to remove -> re-add 6215 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6216 return ERROR_CODE_SUCCESS; 6217 } 6218 // alloc and add to list 6219 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6220 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6221 entry->address_type = address_type; 6222 (void)memcpy(entry->address, address, 6); 6223 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6224 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6225 return ERROR_CODE_SUCCESS; 6226 } 6227 6228 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6229 btstack_linked_list_iterator_t it; 6230 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6231 while (btstack_linked_list_iterator_has_next(&it)){ 6232 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6233 if (entry->address_type != address_type) { 6234 continue; 6235 } 6236 if (memcmp(entry->address, address, 6) != 0) { 6237 continue; 6238 } 6239 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6240 // remove from controller if already present 6241 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6242 } else { 6243 // directly remove entry from whitelist 6244 btstack_linked_list_iterator_remove(&it); 6245 btstack_memory_whitelist_entry_free(entry); 6246 } 6247 return ERROR_CODE_SUCCESS; 6248 } 6249 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6250 } 6251 6252 static void hci_whitelist_clear(void){ 6253 btstack_linked_list_iterator_t it; 6254 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6255 while (btstack_linked_list_iterator_has_next(&it)){ 6256 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6257 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6258 // remove from controller if already present 6259 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6260 continue; 6261 } 6262 // directly remove entry from whitelist 6263 btstack_linked_list_iterator_remove(&it); 6264 btstack_memory_whitelist_entry_free(entry); 6265 } 6266 } 6267 6268 // free all entries unconditionally 6269 static void hci_whitelist_free(void){ 6270 btstack_linked_list_iterator_t lit; 6271 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6272 while (btstack_linked_list_iterator_has_next(&lit)){ 6273 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6274 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6275 btstack_memory_whitelist_entry_free(entry); 6276 } 6277 } 6278 6279 /** 6280 * @brief Clear Whitelist 6281 * @return 0 if ok 6282 */ 6283 uint8_t gap_whitelist_clear(void){ 6284 hci_whitelist_clear(); 6285 hci_run(); 6286 return ERROR_CODE_SUCCESS; 6287 } 6288 6289 /** 6290 * @brief Add Device to Whitelist 6291 * @param address_typ 6292 * @param address 6293 * @return 0 if ok 6294 */ 6295 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6296 uint8_t status = hci_whitelist_add(address_type, address); 6297 if (status){ 6298 return status; 6299 } 6300 hci_run(); 6301 return ERROR_CODE_SUCCESS; 6302 } 6303 6304 /** 6305 * @brief Remove Device from Whitelist 6306 * @param address_typ 6307 * @param address 6308 * @return 0 if ok 6309 */ 6310 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6311 uint8_t status = hci_whitelist_remove(address_type, address); 6312 if (status){ 6313 return status; 6314 } 6315 hci_run(); 6316 return ERROR_CODE_SUCCESS; 6317 } 6318 6319 #ifdef ENABLE_LE_CENTRAL 6320 /** 6321 * @brief Connect with Whitelist 6322 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6323 * @return - if ok 6324 */ 6325 uint8_t gap_connect_with_whitelist(void){ 6326 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6327 return ERROR_CODE_COMMAND_DISALLOWED; 6328 } 6329 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6330 hci_run(); 6331 return ERROR_CODE_SUCCESS; 6332 } 6333 6334 /** 6335 * @brief Auto Connection Establishment - Start Connecting to device 6336 * @param address_typ 6337 * @param address 6338 * @return 0 if ok 6339 */ 6340 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6341 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6342 return ERROR_CODE_COMMAND_DISALLOWED; 6343 } 6344 6345 uint8_t status = hci_whitelist_add(address_type, address); 6346 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6347 return status; 6348 } 6349 6350 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6351 6352 hci_run(); 6353 return ERROR_CODE_SUCCESS; 6354 } 6355 6356 /** 6357 * @brief Auto Connection Establishment - Stop Connecting to device 6358 * @param address_typ 6359 * @param address 6360 * @return 0 if ok 6361 */ 6362 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6363 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6364 return ERROR_CODE_COMMAND_DISALLOWED; 6365 } 6366 6367 hci_whitelist_remove(address_type, address); 6368 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6369 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6370 } 6371 hci_run(); 6372 return 0; 6373 } 6374 6375 /** 6376 * @brief Auto Connection Establishment - Stop everything 6377 * @note Convenience function to stop all active auto connection attempts 6378 */ 6379 uint8_t gap_auto_connection_stop_all(void){ 6380 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6381 return ERROR_CODE_COMMAND_DISALLOWED; 6382 } 6383 hci_whitelist_clear(); 6384 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6385 hci_run(); 6386 return ERROR_CODE_SUCCESS; 6387 } 6388 6389 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6390 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6391 if (!conn) return 0; 6392 return conn->le_connection_interval; 6393 } 6394 #endif 6395 #endif 6396 6397 #ifdef ENABLE_CLASSIC 6398 /** 6399 * @brief Set Extended Inquiry Response data 6400 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6401 * @note has to be done before stack starts up 6402 */ 6403 void gap_set_extended_inquiry_response(const uint8_t * data){ 6404 hci_stack->eir_data = data; 6405 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6406 hci_run(); 6407 } 6408 6409 /** 6410 * @brief Start GAP Classic Inquiry 6411 * @param duration in 1.28s units 6412 * @return 0 if ok 6413 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6414 */ 6415 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6416 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6417 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6418 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6419 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6420 } 6421 hci_stack->inquiry_state = duration_in_1280ms_units; 6422 hci_run(); 6423 return 0; 6424 } 6425 6426 /** 6427 * @brief Stop GAP Classic Inquiry 6428 * @return 0 if ok 6429 */ 6430 int gap_inquiry_stop(void){ 6431 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6432 // emit inquiry complete event, before it even started 6433 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6434 hci_emit_event(event, sizeof(event), 1); 6435 return 0; 6436 } 6437 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6438 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6439 hci_run(); 6440 return 0; 6441 } 6442 6443 void gap_inquiry_set_lap(uint32_t lap){ 6444 hci_stack->inquiry_lap = lap; 6445 } 6446 6447 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6448 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6449 hci_stack->inquiry_scan_window = inquiry_scan_window; 6450 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6451 hci_run(); 6452 } 6453 6454 6455 /** 6456 * @brief Remote Name Request 6457 * @param addr 6458 * @param page_scan_repetition_mode 6459 * @param clock_offset only used when bit 15 is set 6460 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6461 */ 6462 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6463 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6464 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6465 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6466 hci_stack->remote_name_clock_offset = clock_offset; 6467 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6468 hci_run(); 6469 return 0; 6470 } 6471 6472 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6473 hci_stack->gap_pairing_state = state; 6474 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6475 hci_run(); 6476 return 0; 6477 } 6478 6479 /** 6480 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6481 * @param addr 6482 * @param pin_data 6483 * @param pin_len 6484 * @return 0 if ok 6485 */ 6486 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6487 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6488 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6489 hci_stack->gap_pairing_pin_len = pin_len; 6490 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6491 } 6492 6493 /** 6494 * @brief Legacy Pairing Pin Code Response 6495 * @param addr 6496 * @param pin 6497 * @return 0 if ok 6498 */ 6499 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6500 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6501 } 6502 6503 /** 6504 * @brief Abort Legacy Pairing 6505 * @param addr 6506 * @param pin 6507 * @return 0 if ok 6508 */ 6509 int gap_pin_code_negative(bd_addr_t addr){ 6510 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6511 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6512 } 6513 6514 /** 6515 * @brief SSP Passkey Response 6516 * @param addr 6517 * @param passkey 6518 * @return 0 if ok 6519 */ 6520 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6521 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6522 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6523 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6524 } 6525 6526 /** 6527 * @brief Abort SSP Passkey Entry/Pairing 6528 * @param addr 6529 * @param pin 6530 * @return 0 if ok 6531 */ 6532 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6533 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6534 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6535 } 6536 6537 /** 6538 * @brief Accept SSP Numeric Comparison 6539 * @param addr 6540 * @param passkey 6541 * @return 0 if ok 6542 */ 6543 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6544 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6545 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6546 } 6547 6548 /** 6549 * @brief Abort SSP Numeric Comparison/Pairing 6550 * @param addr 6551 * @param pin 6552 * @return 0 if ok 6553 */ 6554 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6555 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6556 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6557 } 6558 6559 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6560 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6561 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6562 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6563 connectionSetAuthenticationFlags(conn, flag); 6564 hci_run(); 6565 return ERROR_CODE_SUCCESS; 6566 } 6567 #endif 6568 6569 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6570 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6571 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6572 } 6573 6574 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6575 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6576 } 6577 #endif 6578 6579 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6580 /** 6581 * @brief Report Remote OOB Data 6582 * @param bd_addr 6583 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6584 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6585 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6586 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6587 */ 6588 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){ 6589 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6590 if (connection == NULL) { 6591 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6592 } 6593 connection->classic_oob_c_192 = c_192; 6594 connection->classic_oob_r_192 = r_192; 6595 6596 // ignore P-256 if not supported by us 6597 if (hci_stack->secure_connections_active){ 6598 connection->classic_oob_c_256 = c_256; 6599 connection->classic_oob_r_256 = r_256; 6600 } 6601 6602 return ERROR_CODE_SUCCESS; 6603 } 6604 /** 6605 * @brief Generate new OOB data 6606 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6607 */ 6608 void gap_ssp_generate_oob_data(void){ 6609 hci_stack->classic_read_local_oob_data = true; 6610 hci_run(); 6611 } 6612 6613 #endif 6614 6615 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6616 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6617 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6618 if (connection == NULL) { 6619 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6620 } 6621 6622 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6623 connection->link_key_type = type; 6624 6625 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6626 } 6627 6628 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6629 /** 6630 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6631 * @param inquiry_mode see bluetooth_defines.h 6632 */ 6633 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6634 hci_stack->inquiry_mode = inquiry_mode; 6635 } 6636 6637 /** 6638 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6639 */ 6640 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6641 hci_stack->sco_voice_setting = voice_setting; 6642 } 6643 6644 /** 6645 * @brief Get SCO Voice Setting 6646 * @return current voice setting 6647 */ 6648 uint16_t hci_get_sco_voice_setting(void){ 6649 return hci_stack->sco_voice_setting; 6650 } 6651 6652 static int hci_have_usb_transport(void){ 6653 if (!hci_stack->hci_transport) return 0; 6654 const char * transport_name = hci_stack->hci_transport->name; 6655 if (!transport_name) return 0; 6656 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6657 } 6658 6659 /** @brief Get SCO packet length for current SCO Voice setting 6660 * @note Using SCO packets of the exact length is required for USB transfer 6661 * @return Length of SCO packets in bytes (not audio frames) 6662 */ 6663 uint16_t hci_get_sco_packet_length(void){ 6664 uint16_t sco_packet_length = 0; 6665 6666 #ifdef ENABLE_SCO_OVER_HCI 6667 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6668 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6669 6670 if (hci_have_usb_transport()){ 6671 // see Core Spec for H2 USB Transfer. 6672 // 3 byte SCO header + 24 bytes per connection 6673 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6674 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6675 } else { 6676 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6677 sco_packet_length = 3 + 60 * multiplier; 6678 // assert that it still fits inside an SCO buffer 6679 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6680 sco_packet_length = 3 + 60; 6681 } 6682 } 6683 #endif 6684 6685 #ifdef HAVE_SCO_TRANSPORT 6686 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6687 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6688 sco_packet_length = 3 + 60 * multiplier; 6689 #endif 6690 return sco_packet_length; 6691 } 6692 6693 /** 6694 * @brief Sets the master/slave policy 6695 * @param policy (0: attempt to become master, 1: let connecting device decide) 6696 */ 6697 void hci_set_master_slave_policy(uint8_t policy){ 6698 hci_stack->master_slave_policy = policy; 6699 } 6700 6701 #endif 6702 6703 HCI_STATE hci_get_state(void){ 6704 return hci_stack->state; 6705 } 6706 6707 #ifdef ENABLE_CLASSIC 6708 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6709 hci_stack->gap_classic_accept_callback = accept_callback; 6710 } 6711 #endif 6712 6713 /** 6714 * @brief Set callback for Bluetooth Hardware Error 6715 */ 6716 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6717 hci_stack->hardware_error_callback = fn; 6718 } 6719 6720 void hci_disconnect_all(void){ 6721 btstack_linked_list_iterator_t it; 6722 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6723 while (btstack_linked_list_iterator_has_next(&it)){ 6724 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6725 if (con->state == SENT_DISCONNECT) continue; 6726 con->state = SEND_DISCONNECT; 6727 } 6728 hci_run(); 6729 } 6730 6731 uint16_t hci_get_manufacturer(void){ 6732 return hci_stack->manufacturer; 6733 } 6734 6735 #ifdef ENABLE_BLE 6736 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6737 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6738 if (!hci_con) return NULL; 6739 return &hci_con->sm_connection; 6740 } 6741 6742 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6743 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6744 #endif 6745 6746 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6747 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6748 if (hci_connection == NULL) return 0; 6749 if (hci_is_le_connection(hci_connection)){ 6750 #ifdef ENABLE_BLE 6751 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6752 if (sm_conn->sm_connection_encrypted) { 6753 return sm_conn->sm_actual_encryption_key_size; 6754 } 6755 #endif 6756 } else { 6757 #ifdef ENABLE_CLASSIC 6758 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6759 return hci_connection->encryption_key_size; 6760 } 6761 #endif 6762 } 6763 return 0; 6764 } 6765 6766 int gap_authenticated(hci_con_handle_t con_handle){ 6767 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6768 if (hci_connection == NULL) return 0; 6769 6770 switch (hci_connection->address_type){ 6771 #ifdef ENABLE_BLE 6772 case BD_ADDR_TYPE_LE_PUBLIC: 6773 case BD_ADDR_TYPE_LE_RANDOM: 6774 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6775 return hci_connection->sm_connection.sm_connection_authenticated; 6776 #endif 6777 #ifdef ENABLE_CLASSIC 6778 case BD_ADDR_TYPE_SCO: 6779 case BD_ADDR_TYPE_ACL: 6780 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6781 #endif 6782 default: 6783 return 0; 6784 } 6785 } 6786 6787 int gap_secure_connection(hci_con_handle_t con_handle){ 6788 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6789 if (hci_connection == NULL) return 0; 6790 6791 switch (hci_connection->address_type){ 6792 #ifdef ENABLE_BLE 6793 case BD_ADDR_TYPE_LE_PUBLIC: 6794 case BD_ADDR_TYPE_LE_RANDOM: 6795 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6796 return hci_connection->sm_connection.sm_connection_sc; 6797 #endif 6798 #ifdef ENABLE_CLASSIC 6799 case BD_ADDR_TYPE_SCO: 6800 case BD_ADDR_TYPE_ACL: 6801 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6802 #endif 6803 default: 6804 return 0; 6805 } 6806 } 6807 6808 bool gap_bonded(hci_con_handle_t con_handle){ 6809 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6810 if (hci_connection == NULL) return 0; 6811 6812 #ifdef ENABLE_CLASSIC 6813 link_key_t link_key; 6814 link_key_type_t link_key_type; 6815 #endif 6816 switch (hci_connection->address_type){ 6817 #ifdef ENABLE_BLE 6818 case BD_ADDR_TYPE_LE_PUBLIC: 6819 case BD_ADDR_TYPE_LE_RANDOM: 6820 return hci_connection->sm_connection.sm_le_db_index >= 0; 6821 #endif 6822 #ifdef ENABLE_CLASSIC 6823 case BD_ADDR_TYPE_SCO: 6824 case BD_ADDR_TYPE_ACL: 6825 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6826 #endif 6827 default: 6828 return false; 6829 } 6830 } 6831 6832 #ifdef ENABLE_BLE 6833 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6834 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6835 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6836 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6837 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6838 return sm_conn->sm_connection_authorization_state; 6839 } 6840 #endif 6841 6842 #ifdef ENABLE_CLASSIC 6843 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){ 6844 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6845 if (!conn) return GAP_CONNECTION_INVALID; 6846 conn->sniff_min_interval = sniff_min_interval; 6847 conn->sniff_max_interval = sniff_max_interval; 6848 conn->sniff_attempt = sniff_attempt; 6849 conn->sniff_timeout = sniff_timeout; 6850 hci_run(); 6851 return 0; 6852 } 6853 6854 /** 6855 * @brief Exit Sniff mode 6856 * @param con_handle 6857 @ @return 0 if ok 6858 */ 6859 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6860 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6861 if (!conn) return GAP_CONNECTION_INVALID; 6862 conn->sniff_min_interval = 0xffff; 6863 hci_run(); 6864 return 0; 6865 } 6866 6867 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){ 6868 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6869 if (!conn) return GAP_CONNECTION_INVALID; 6870 conn->sniff_subrating_max_latency = max_latency; 6871 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6872 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6873 hci_run(); 6874 return ERROR_CODE_SUCCESS; 6875 } 6876 6877 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){ 6878 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6879 if (!conn) return GAP_CONNECTION_INVALID; 6880 conn->qos_service_type = service_type; 6881 conn->qos_token_rate = token_rate; 6882 conn->qos_peak_bandwidth = peak_bandwidth; 6883 conn->qos_latency = latency; 6884 conn->qos_delay_variation = delay_variation; 6885 hci_run(); 6886 return ERROR_CODE_SUCCESS; 6887 } 6888 6889 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6890 hci_stack->new_page_scan_interval = page_scan_interval; 6891 hci_stack->new_page_scan_window = page_scan_window; 6892 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6893 hci_run(); 6894 } 6895 6896 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6897 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6898 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6899 hci_run(); 6900 } 6901 6902 void gap_set_page_timeout(uint16_t page_timeout){ 6903 hci_stack->page_timeout = page_timeout; 6904 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6905 hci_run(); 6906 } 6907 6908 #endif 6909 6910 void hci_halting_defer(void){ 6911 if (hci_stack->state != HCI_STATE_HALTING) return; 6912 switch (hci_stack->substate){ 6913 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6914 case HCI_HALTING_CLOSE: 6915 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6916 break; 6917 default: 6918 break; 6919 } 6920 } 6921 6922 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6923 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6924 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6925 if (le_device_db_index >= le_device_db_max_count()) return; 6926 uint8_t offset = le_device_db_index >> 3; 6927 uint8_t mask = 1 << (le_device_db_index & 7); 6928 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6929 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6930 // note: go back to remove entries, otherwise, a remove + add will skip the add 6931 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6932 } 6933 } 6934 6935 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6936 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6937 if (le_device_db_index >= le_device_db_max_count()) return; 6938 uint8_t offset = le_device_db_index >> 3; 6939 uint8_t mask = 1 << (le_device_db_index & 7); 6940 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6941 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6942 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6943 } 6944 } 6945 6946 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6947 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6948 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6949 } 6950 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6951 // restart le resolving list update 6952 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6953 } 6954 return ERROR_CODE_SUCCESS; 6955 } 6956 #endif 6957 6958 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6959 void hci_setup_test_connections_fuzz(void){ 6960 hci_connection_t * conn; 6961 6962 // default address: 66:55:44:33:00:01 6963 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6964 6965 // setup Controller info 6966 hci_stack->num_cmd_packets = 255; 6967 hci_stack->acl_packets_total_num = 255; 6968 6969 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6970 addr[5] = 0x01; 6971 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6972 conn->con_handle = addr[5]; 6973 conn->role = HCI_ROLE_SLAVE; 6974 conn->state = RECEIVED_CONNECTION_REQUEST; 6975 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6976 6977 // setup incoming Classic SCO connection with con handle 0x0002 6978 addr[5] = 0x02; 6979 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6980 conn->con_handle = addr[5]; 6981 conn->role = HCI_ROLE_SLAVE; 6982 conn->state = RECEIVED_CONNECTION_REQUEST; 6983 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6984 6985 // setup ready Classic ACL connection with con handle 0x0003 6986 addr[5] = 0x03; 6987 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6988 conn->con_handle = addr[5]; 6989 conn->role = HCI_ROLE_SLAVE; 6990 conn->state = OPEN; 6991 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6992 6993 // setup ready Classic SCO connection with con handle 0x0004 6994 addr[5] = 0x04; 6995 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6996 conn->con_handle = addr[5]; 6997 conn->role = HCI_ROLE_SLAVE; 6998 conn->state = OPEN; 6999 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7000 7001 // setup ready LE ACL connection with con handle 0x005 and public address 7002 addr[5] = 0x05; 7003 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7004 conn->con_handle = addr[5]; 7005 conn->role = HCI_ROLE_SLAVE; 7006 conn->state = OPEN; 7007 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7008 conn->sm_connection.sm_connection_encrypted = 1; 7009 } 7010 7011 void hci_free_connections_fuzz(void){ 7012 btstack_linked_list_iterator_t it; 7013 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7014 while (btstack_linked_list_iterator_has_next(&it)){ 7015 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7016 btstack_linked_list_iterator_remove(&it); 7017 btstack_memory_hci_connection_free(con); 7018 } 7019 } 7020 void hci_simulate_working_fuzz(void){ 7021 hci_init_done(); 7022 hci_stack->num_cmd_packets = 255; 7023 } 7024 #endif 7025