1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef 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_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 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){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 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); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 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){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 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); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 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); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 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); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // 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); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 bool need_baud_change = false; 1438 1439 #ifndef HAVE_HOST_CONTROLLER_API 1440 need_baud_change = hci_stack->config 1441 && hci_stack->chipset 1442 && hci_stack->chipset->set_baudrate_command 1443 && hci_stack->hci_transport->set_baudrate 1444 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1445 #endif 1446 1447 switch (hci_stack->substate){ 1448 case HCI_INIT_SEND_RESET: 1449 hci_state_reset(); 1450 1451 #ifndef HAVE_HOST_CONTROLLER_API 1452 // prepare reset if command complete not received in 100ms 1453 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1454 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1455 btstack_run_loop_add_timer(&hci_stack->timeout); 1456 #endif 1457 // send command 1458 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1459 hci_send_cmd(&hci_reset); 1460 break; 1461 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1462 hci_send_cmd(&hci_read_local_version_information); 1463 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1464 break; 1465 case HCI_INIT_SEND_READ_LOCAL_NAME: 1466 hci_send_cmd(&hci_read_local_name); 1467 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1468 break; 1469 1470 #ifndef HAVE_HOST_CONTROLLER_API 1471 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1472 hci_state_reset(); 1473 // prepare reset if command complete not received in 100ms 1474 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1475 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1476 btstack_run_loop_add_timer(&hci_stack->timeout); 1477 // send command 1478 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1479 hci_send_cmd(&hci_reset); 1480 break; 1481 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1482 hci_state_reset(); 1483 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1484 hci_send_cmd(&hci_reset); 1485 break; 1486 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1487 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1488 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1489 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1490 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1491 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1492 break; 1493 } 1494 case HCI_INIT_SET_BD_ADDR: 1495 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1496 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1497 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1498 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1499 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1500 break; 1501 case HCI_INIT_SEND_BAUD_CHANGE: 1502 if (need_baud_change) { 1503 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1504 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1505 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1506 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1507 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1508 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1509 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1511 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1512 btstack_run_loop_add_timer(&hci_stack->timeout); 1513 } 1514 break; 1515 } 1516 1517 /* fall through */ 1518 1519 case HCI_INIT_CUSTOM_INIT: 1520 // Custom initialization 1521 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1522 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1523 bool send_cmd = false; 1524 switch (hci_stack->chipset_result){ 1525 case BTSTACK_CHIPSET_VALID_COMMAND: 1526 send_cmd = true; 1527 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1528 break; 1529 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1530 send_cmd = true; 1531 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1532 log_info("CSR Warm Boot"); 1533 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1534 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1535 btstack_run_loop_add_timer(&hci_stack->timeout); 1536 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1537 && hci_stack->config 1538 && hci_stack->chipset 1539 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1540 && hci_stack->hci_transport->set_baudrate 1541 && hci_transport_uart_get_main_baud_rate()){ 1542 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1543 } else { 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1545 } 1546 break; 1547 default: 1548 break; 1549 } 1550 1551 if (send_cmd){ 1552 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1553 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1554 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1555 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1556 break; 1557 } 1558 log_info("Init script done"); 1559 1560 // Init script download on Broadcom chipsets causes: 1561 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1562 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1563 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1564 1565 // - baud rate to reset, restore UART baud rate if needed 1566 if (need_baud_change) { 1567 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1568 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1569 hci_stack->hci_transport->set_baudrate(baud_rate); 1570 } 1571 1572 uint16_t bcm_delay_ms = 300; 1573 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1574 // -> Work around: wait here. 1575 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1576 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1577 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1578 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1579 btstack_run_loop_add_timer(&hci_stack->timeout); 1580 break; 1581 } 1582 } 1583 /* fall through */ 1584 #endif 1585 1586 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1587 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1588 hci_send_cmd(&hci_read_local_supported_commands); 1589 break; 1590 case HCI_INIT_READ_BD_ADDR: 1591 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1592 hci_send_cmd(&hci_read_bd_addr); 1593 break; 1594 case HCI_INIT_READ_BUFFER_SIZE: 1595 // only read buffer size if supported 1596 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1597 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1598 hci_send_cmd(&hci_read_buffer_size); 1599 break; 1600 } 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1605 hci_send_cmd(&hci_read_local_supported_features); 1606 break; 1607 1608 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1609 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1610 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1611 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1612 break; 1613 case HCI_INIT_HOST_BUFFER_SIZE: 1614 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1615 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1616 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1617 break; 1618 #endif 1619 1620 case HCI_INIT_SET_EVENT_MASK: 1621 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1622 if (hci_le_supported()){ 1623 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1624 } else { 1625 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1626 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1627 } 1628 break; 1629 1630 #ifdef ENABLE_CLASSIC 1631 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1632 if (hci_classic_supported() && gap_ssp_supported()){ 1633 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1634 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1635 break; 1636 } 1637 /* fall through */ 1638 1639 case HCI_INIT_WRITE_INQUIRY_MODE: 1640 if (hci_classic_supported()){ 1641 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1642 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1643 break; 1644 } 1645 /* fall through */ 1646 1647 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1648 // skip write secure connections host support if not supported or disabled 1649 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1650 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1651 hci_stack->secure_connections_active = true; 1652 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1653 break; 1654 } 1655 /* fall through */ 1656 1657 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1658 if (hci_classic_supported()){ 1659 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1660 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1661 break; 1662 } 1663 /* fall through */ 1664 1665 #ifdef ENABLE_SCO_OVER_HCI 1666 // only sent if ENABLE_SCO_OVER_HCI is defined 1667 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1668 // skip write synchronous flow control if not supported 1669 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1670 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1671 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1672 break; 1673 } 1674 /* fall through */ 1675 1676 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1677 // skip write default erroneous data reporting if not supported 1678 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1679 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1680 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1681 break; 1682 } 1683 /* fall through */ 1684 #endif 1685 1686 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1687 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1688 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1689 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1690 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1691 #ifdef ENABLE_SCO_OVER_HCI 1692 log_info("BCM: Route SCO data via HCI transport"); 1693 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1694 #endif 1695 #ifdef ENABLE_SCO_OVER_PCM 1696 log_info("BCM: Route SCO data via PCM interface"); 1697 #ifdef ENABLE_BCM_PCM_WBS 1698 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1699 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1700 #else 1701 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1702 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1703 #endif 1704 #endif 1705 break; 1706 } 1707 /* fall through */ 1708 #endif 1709 1710 #ifdef ENABLE_SCO_OVER_PCM 1711 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1712 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1713 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1714 log_info("BCM: Config PCM interface for I2S"); 1715 #ifdef ENABLE_BCM_PCM_WBS 1716 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1717 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1718 #else 1719 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1720 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1721 #endif 1722 break; 1723 } 1724 /* fall through */ 1725 #endif 1726 #endif 1727 1728 #ifdef ENABLE_BLE 1729 // LE INIT 1730 case HCI_INIT_LE_READ_BUFFER_SIZE: 1731 if (hci_le_supported()){ 1732 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1733 hci_send_cmd(&hci_le_read_buffer_size); 1734 break; 1735 } 1736 /* fall through */ 1737 1738 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1739 // skip write le host if not supported (e.g. on LE only EM9301) 1740 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1741 // LE Supported Host = 1, Simultaneous Host = 0 1742 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1743 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1744 break; 1745 } 1746 /* fall through */ 1747 1748 case HCI_INIT_LE_SET_EVENT_MASK: 1749 if (hci_le_supported()){ 1750 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1751 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1752 break; 1753 } 1754 /* fall through */ 1755 1756 #endif 1757 1758 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1759 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1760 if (hci_le_supported()){ 1761 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1762 hci_send_cmd(&hci_le_read_maximum_data_length); 1763 break; 1764 } 1765 /* fall through */ 1766 1767 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1768 if (hci_le_supported()){ 1769 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1770 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1771 break; 1772 } 1773 /* fall through */ 1774 #endif 1775 1776 #ifdef ENABLE_LE_CENTRAL 1777 case HCI_INIT_READ_WHITE_LIST_SIZE: 1778 if (hci_le_supported()){ 1779 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1780 hci_send_cmd(&hci_le_read_white_list_size); 1781 break; 1782 } 1783 /* fall through */ 1784 1785 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1786 if (hci_le_supported()){ 1787 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1788 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); 1789 break; 1790 } 1791 /* fall through */ 1792 #endif 1793 1794 case HCI_INIT_DONE: 1795 hci_stack->substate = HCI_INIT_DONE; 1796 #ifdef ENABLE_CLASSIC 1797 // init sequence complete, check if GAP Tasks are completed 1798 if (hci_stack->gap_tasks != 0) { 1799 hci_run_gap_tasks_classic(); 1800 break; 1801 } 1802 #endif 1803 hci_init_done(); 1804 break; 1805 1806 default: 1807 return; 1808 } 1809 } 1810 1811 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1812 bool command_completed = false; 1813 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1814 uint16_t opcode = little_endian_read_16(packet,3); 1815 if (opcode == hci_stack->last_cmd_opcode){ 1816 command_completed = true; 1817 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1818 } else { 1819 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1820 } 1821 } 1822 1823 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1824 uint8_t status = packet[2]; 1825 uint16_t opcode = little_endian_read_16(packet,4); 1826 if (opcode == hci_stack->last_cmd_opcode){ 1827 if (status){ 1828 command_completed = true; 1829 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1830 } else { 1831 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1832 } 1833 } else { 1834 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1835 } 1836 } 1837 #ifndef HAVE_HOST_CONTROLLER_API 1838 // Vendor == CSR 1839 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1840 // TODO: track actual command 1841 command_completed = true; 1842 } 1843 1844 // Vendor == Toshiba 1845 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1846 // TODO: track actual command 1847 command_completed = true; 1848 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1849 hci_stack->num_cmd_packets = 1; 1850 } 1851 #endif 1852 1853 return command_completed; 1854 } 1855 1856 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1857 1858 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1859 1860 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1861 1862 #ifndef HAVE_HOST_CONTROLLER_API 1863 1864 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1865 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1866 // 1867 // HCI Reset 1868 // Timeout 100 ms 1869 // HCI Reset 1870 // Command Complete Reset 1871 // HCI Read Local Version Information 1872 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1873 // hang... 1874 // 1875 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1876 if (!command_completed 1877 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1878 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1879 1880 uint16_t opcode = little_endian_read_16(packet,3); 1881 if (opcode == hci_reset.opcode){ 1882 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1883 return; 1884 } 1885 } 1886 1887 // CSR & H5 1888 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1889 if (!command_completed 1890 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1891 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1892 1893 uint16_t opcode = little_endian_read_16(packet,3); 1894 if (opcode == hci_reset.opcode){ 1895 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1896 return; 1897 } 1898 } 1899 1900 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1901 // fix: Correct substate and behave as command below 1902 if (command_completed){ 1903 switch (hci_stack->substate){ 1904 case HCI_INIT_SEND_RESET: 1905 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1906 break; 1907 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1908 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1909 break; 1910 default: 1911 break; 1912 } 1913 } 1914 1915 #endif 1916 1917 if (!command_completed) return; 1918 1919 bool need_baud_change = false; 1920 bool need_addr_change = false; 1921 1922 #ifndef HAVE_HOST_CONTROLLER_API 1923 need_baud_change = hci_stack->config 1924 && hci_stack->chipset 1925 && hci_stack->chipset->set_baudrate_command 1926 && hci_stack->hci_transport->set_baudrate 1927 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1928 1929 need_addr_change = hci_stack->custom_bd_addr_set 1930 && hci_stack->chipset 1931 && hci_stack->chipset->set_bd_addr_command; 1932 #endif 1933 1934 switch(hci_stack->substate){ 1935 1936 #ifndef HAVE_HOST_CONTROLLER_API 1937 case HCI_INIT_SEND_RESET: 1938 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1939 // fix: just correct substate and behave as command below 1940 1941 /* fall through */ 1942 #endif 1943 1944 case HCI_INIT_W4_SEND_RESET: 1945 btstack_run_loop_remove_timer(&hci_stack->timeout); 1946 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1947 return; 1948 1949 #ifndef HAVE_HOST_CONTROLLER_API 1950 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1951 // for STLC2500D, baud rate change already happened. 1952 // for others, baud rate gets changed now 1953 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1954 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1955 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1956 hci_stack->hci_transport->set_baudrate(baud_rate); 1957 } 1958 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1959 return; 1960 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1961 btstack_run_loop_remove_timer(&hci_stack->timeout); 1962 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1963 return; 1964 case HCI_INIT_W4_CUSTOM_INIT: 1965 // repeat custom init 1966 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1967 return; 1968 #endif 1969 1970 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1971 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1972 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1973 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1974 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1975 return; 1976 } 1977 if (need_addr_change){ 1978 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1979 return; 1980 } 1981 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1982 return; 1983 #ifndef HAVE_HOST_CONTROLLER_API 1984 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1985 if (need_baud_change){ 1986 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1987 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1988 hci_stack->hci_transport->set_baudrate(baud_rate); 1989 } 1990 if (need_addr_change){ 1991 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1992 return; 1993 } 1994 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1995 return; 1996 case HCI_INIT_W4_SET_BD_ADDR: 1997 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1998 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1999 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2000 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2001 return; 2002 } 2003 // skipping st warm boot 2004 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2005 return; 2006 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2007 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2008 return; 2009 #endif 2010 2011 #ifdef ENABLE_BLE 2012 2013 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2014 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 2015 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 2016 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 2017 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2018 return; 2019 } 2020 // explicit fall through to reduce repetitions 2021 2022 #ifdef ENABLE_LE_CENTRAL 2023 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 2024 #else 2025 hci_stack->substate = HCI_INIT_DONE; 2026 #endif 2027 return; 2028 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 2029 2030 #endif /* ENABLE_BLE */ 2031 2032 case HCI_INIT_DONE: 2033 // set state if we came here by fall through 2034 hci_stack->substate = HCI_INIT_DONE; 2035 return; 2036 2037 default: 2038 break; 2039 } 2040 hci_initializing_next_state(); 2041 } 2042 2043 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2044 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2045 bd_addr_t bd_address; 2046 (void)memcpy(&bd_address, conn->address, 6); 2047 2048 #ifdef ENABLE_CLASSIC 2049 // cache needed data 2050 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2051 #endif 2052 2053 // connection failed, remove entry 2054 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2055 btstack_memory_hci_connection_free( conn ); 2056 2057 #ifdef ENABLE_CLASSIC 2058 // notify client if dedicated bonding 2059 if (notify_dedicated_bonding_failed){ 2060 log_info("hci notify_dedicated_bonding_failed"); 2061 hci_emit_dedicated_bonding_result(bd_address, status); 2062 } 2063 2064 // if authentication error, also delete link key 2065 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2066 gap_drop_link_key_for_bd_addr(bd_address); 2067 } 2068 #else 2069 UNUSED(status); 2070 #endif 2071 } 2072 2073 #ifdef ENABLE_CLASSIC 2074 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2075 // SSP Controller 2076 if (features[6] & (1 << 3)){ 2077 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2078 } 2079 // eSCO 2080 if (features[3] & (1<<7)){ 2081 conn->remote_supported_features[0] |= 1; 2082 } 2083 // Extended features 2084 if (features[7] & (1<<7)){ 2085 conn->remote_supported_features[0] |= 2; 2086 } 2087 } 2088 2089 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2090 // SSP Host 2091 if (features[0] & (1 << 0)){ 2092 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2093 } 2094 // SC Host 2095 if (features[0] & (1 << 3)){ 2096 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2097 } 2098 } 2099 2100 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2101 // SC Controller 2102 if (features[1] & (1 << 0)){ 2103 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2104 } 2105 } 2106 2107 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2108 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2109 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2110 if (conn->bonding_flags & BONDING_DEDICATED){ 2111 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2112 } 2113 } 2114 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2115 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2116 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2117 } 2118 2119 #endif 2120 2121 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2122 // handle BT initialization 2123 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2124 hci_initializing_event_handler(packet, size); 2125 } 2126 2127 // help with BT sleep 2128 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2129 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2130 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2131 hci_initializing_next_state(); 2132 } 2133 } 2134 2135 #ifdef ENABLE_CLASSIC 2136 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2137 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2138 conn->encryption_key_size = encryption_key_size; 2139 2140 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2141 conn->requested_security_level = LEVEL_0; 2142 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2143 return; 2144 } 2145 2146 // Request Authentication if not already done 2147 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2148 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2149 } 2150 #endif 2151 2152 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2153 UNUSED(size); 2154 2155 uint16_t manufacturer; 2156 #ifdef ENABLE_CLASSIC 2157 hci_con_handle_t handle; 2158 hci_connection_t * conn; 2159 uint8_t status; 2160 #endif 2161 // get num cmd packets - limit to 1 to reduce complexity 2162 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2163 2164 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2165 switch (opcode){ 2166 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2167 if (packet[5]) break; 2168 // terminate, name 248 chars 2169 packet[6+248] = 0; 2170 log_info("local name: %s", &packet[6]); 2171 break; 2172 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2173 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2174 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2175 uint16_t acl_len = little_endian_read_16(packet, 6); 2176 uint16_t sco_len = packet[8]; 2177 2178 // determine usable ACL/SCO payload size 2179 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2180 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2181 2182 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2183 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2184 2185 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2186 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2187 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2188 } 2189 break; 2190 case HCI_OPCODE_HCI_READ_RSSI: 2191 if (packet[5] == ERROR_CODE_SUCCESS){ 2192 uint8_t event[5]; 2193 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2194 event[1] = 3; 2195 (void)memcpy(&event[2], &packet[6], 3); 2196 hci_emit_event(event, sizeof(event), 1); 2197 } 2198 break; 2199 #ifdef ENABLE_BLE 2200 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2201 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2202 hci_stack->le_acl_packets_total_num = packet[8]; 2203 // determine usable ACL payload size 2204 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2205 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2206 } 2207 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2208 break; 2209 #endif 2210 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2211 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2212 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2213 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2214 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); 2215 break; 2216 #endif 2217 #ifdef ENABLE_LE_CENTRAL 2218 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2219 hci_stack->le_whitelist_capacity = packet[6]; 2220 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2221 break; 2222 #endif 2223 case HCI_OPCODE_HCI_READ_BD_ADDR: 2224 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2225 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)); 2226 #ifdef ENABLE_CLASSIC 2227 if (hci_stack->link_key_db){ 2228 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2229 } 2230 #endif 2231 break; 2232 #ifdef ENABLE_CLASSIC 2233 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2234 hci_emit_discoverable_enabled(hci_stack->discoverable); 2235 break; 2236 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2237 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2238 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2239 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2240 hci_emit_event(event, sizeof(event), 1); 2241 } 2242 break; 2243 #endif 2244 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2245 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2246 2247 #ifdef ENABLE_CLASSIC 2248 // determine usable ACL packet types based on host buffer size and supported features 2249 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2250 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2251 #endif 2252 // Classic/LE 2253 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2254 break; 2255 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2256 manufacturer = little_endian_read_16(packet, 10); 2257 // map Cypress to Broadcom 2258 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2259 log_info("Treat Cypress as Broadcom"); 2260 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2261 little_endian_store_16(packet, 10, manufacturer); 2262 } 2263 hci_stack->manufacturer = manufacturer; 2264 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2265 break; 2266 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2267 hci_stack->local_supported_commands[0] = 2268 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2269 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2270 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2276 hci_stack->local_supported_commands[1] = 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2282 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2283 break; 2284 #ifdef ENABLE_CLASSIC 2285 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2286 if (packet[5]) return; 2287 hci_stack->synchronous_flow_control_enabled = 1; 2288 break; 2289 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2290 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2291 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2292 conn = hci_connection_for_handle(handle); 2293 if (conn != NULL) { 2294 uint8_t key_size = 0; 2295 if (status == 0){ 2296 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2297 log_info("Handle %04x key Size: %u", handle, key_size); 2298 } else { 2299 key_size = 1; 2300 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2301 } 2302 hci_handle_read_encryption_key_size_complete(conn, key_size); 2303 } 2304 break; 2305 // assert pairing complete event is emitted. 2306 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2307 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2308 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2309 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2310 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2311 // lookup connection by gap pairing addr 2312 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2313 if (conn == NULL) break; 2314 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2315 break; 2316 2317 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2318 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2319 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2320 uint8_t event[67]; 2321 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2322 event[1] = 65; 2323 (void)memset(&event[2], 0, 65); 2324 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2325 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2326 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2327 event[2] = 3; 2328 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2329 } else { 2330 event[2] = 1; 2331 } 2332 } 2333 hci_emit_event(event, sizeof(event), 0); 2334 break; 2335 } 2336 2337 // note: only needed if user does not provide OOB data 2338 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2339 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2340 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2341 if (conn == NULL) break; 2342 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2343 break; 2344 #endif 2345 #endif 2346 default: 2347 break; 2348 } 2349 } 2350 2351 #ifdef ENABLE_BLE 2352 static void event_handle_le_connection_complete(const uint8_t * packet){ 2353 bd_addr_t addr; 2354 bd_addr_type_t addr_type; 2355 hci_connection_t * conn; 2356 2357 // Connection management 2358 reverse_bd_addr(&packet[8], addr); 2359 addr_type = (bd_addr_type_t)packet[7]; 2360 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2361 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2362 2363 #ifdef ENABLE_LE_CENTRAL 2364 // handle error: error is reported only to the initiator -> outgoing connection 2365 if (packet[3]){ 2366 2367 // handle cancelled outgoing connection 2368 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2369 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2370 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2371 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2372 // reset state 2373 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2374 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2375 // get outgoing connection conn struct for direct connect 2376 conn = gap_get_outgoing_connection(); 2377 } 2378 2379 // outgoing le connection establishment is done 2380 if (conn){ 2381 // remove entry 2382 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2383 btstack_memory_hci_connection_free( conn ); 2384 } 2385 return; 2386 } 2387 #endif 2388 2389 // on success, both hosts receive connection complete event 2390 if (packet[6] == HCI_ROLE_MASTER){ 2391 #ifdef ENABLE_LE_CENTRAL 2392 // if we're master on an le connection, it was an outgoing connection and we're done with it 2393 // note: no hci_connection_t object exists yet for connect with whitelist 2394 if (hci_is_le_connection_type(addr_type)){ 2395 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2396 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2397 } 2398 #endif 2399 } else { 2400 #ifdef ENABLE_LE_PERIPHERAL 2401 // if we're slave, it was an incoming connection, advertisements have stopped 2402 hci_stack->le_advertisements_active = false; 2403 #endif 2404 } 2405 2406 // LE connections are auto-accepted, so just create a connection if there isn't one already 2407 if (!conn){ 2408 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2409 } 2410 2411 // no memory, sorry. 2412 if (!conn){ 2413 return; 2414 } 2415 2416 conn->state = OPEN; 2417 conn->role = packet[6]; 2418 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2419 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2420 2421 #ifdef ENABLE_LE_PERIPHERAL 2422 if (packet[6] == HCI_ROLE_SLAVE){ 2423 hci_update_advertisements_enabled_for_current_roles(); 2424 } 2425 #endif 2426 2427 // init unenhanced att bearer mtu 2428 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2429 conn->att_connection.mtu_exchanged = false; 2430 2431 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2432 2433 // restart timer 2434 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2435 // btstack_run_loop_add_timer(&conn->timeout); 2436 2437 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2438 2439 hci_emit_nr_connections_changed(); 2440 } 2441 #endif 2442 2443 #ifdef ENABLE_CLASSIC 2444 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){ 2445 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2446 // LEVEL_4 is tested by l2cap 2447 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2448 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2449 if (level >= LEVEL_3){ 2450 // MITM not possible without keyboard or display 2451 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2452 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2453 2454 // MITM possible if one side has keyboard and the other has keyboard or display 2455 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2456 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2457 2458 // MITM not possible if one side has only display and other side has no keyboard 2459 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2460 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2461 } 2462 // LEVEL 2 requires SSP, which is a given 2463 return true; 2464 } 2465 2466 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2467 uint16_t i; 2468 for (i=0; i < size ; i++){ 2469 if (data[i] != 0) { 2470 return false; 2471 } 2472 } 2473 return true; 2474 } 2475 2476 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2477 // get requested security level 2478 gap_security_level_t requested_security_level = conn->requested_security_level; 2479 if (hci_stack->gap_secure_connections_only_mode){ 2480 requested_security_level = LEVEL_4; 2481 } 2482 2483 // assess security: LEVEL 4 requires SC 2484 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2485 if ((requested_security_level == LEVEL_4) && 2486 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2487 !hci_remote_sc_enabled(conn)){ 2488 log_info("Level 4 required, but SC not supported -> abort"); 2489 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2490 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2491 return; 2492 } 2493 2494 // assess security based on io capabilities 2495 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2496 // responder: fully validate io caps of both sides as well as OOB data 2497 bool security_possible = false; 2498 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2499 2500 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2501 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2502 // so we merge the OOB data availability 2503 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2504 if (conn->classic_oob_c_192 != NULL){ 2505 have_oob_data |= 1; 2506 } 2507 if (conn->classic_oob_c_256 != NULL){ 2508 have_oob_data |= 2; 2509 } 2510 // for up to Level 3, either P-192 as well as P-256 will do 2511 // 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 2512 // if remote does not SC, we should not receive P-256 data either 2513 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2514 security_possible = true; 2515 } 2516 // for Level 4, P-256 is needed 2517 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2518 security_possible = true; 2519 } 2520 #endif 2521 2522 if (security_possible == false){ 2523 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2524 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2525 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2526 return; 2527 } 2528 } else { 2529 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2530 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2531 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2532 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2533 log_info("Level 3+ required, but no input/output -> abort"); 2534 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2535 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2536 return; 2537 } 2538 #endif 2539 #endif 2540 } 2541 2542 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2543 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2544 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2545 } else { 2546 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2547 } 2548 #endif 2549 } 2550 2551 #endif 2552 2553 static void event_handler(uint8_t *packet, uint16_t size){ 2554 2555 uint16_t event_length = packet[1]; 2556 2557 // assert packet is complete 2558 if (size != (event_length + 2u)){ 2559 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2560 return; 2561 } 2562 2563 bd_addr_type_t addr_type; 2564 hci_con_handle_t handle; 2565 hci_connection_t * conn; 2566 int i; 2567 int create_connection_cmd; 2568 2569 #ifdef ENABLE_CLASSIC 2570 hci_link_type_t link_type; 2571 bd_addr_t addr; 2572 #endif 2573 2574 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2575 2576 switch (hci_event_packet_get_type(packet)) { 2577 2578 case HCI_EVENT_COMMAND_COMPLETE: 2579 handle_command_complete_event(packet, size); 2580 break; 2581 2582 case HCI_EVENT_COMMAND_STATUS: 2583 // get num cmd packets - limit to 1 to reduce complexity 2584 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2585 2586 // check command status to detected failed outgoing connections 2587 create_connection_cmd = 0; 2588 #ifdef ENABLE_CLASSIC 2589 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2590 create_connection_cmd = 1; 2591 } 2592 #endif 2593 #ifdef ENABLE_LE_CENTRAL 2594 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2595 create_connection_cmd = 1; 2596 } 2597 #endif 2598 if (create_connection_cmd) { 2599 uint8_t status = hci_event_command_status_get_status(packet); 2600 addr_type = hci_stack->outgoing_addr_type; 2601 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2602 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); 2603 2604 // reset outgoing address info 2605 memset(hci_stack->outgoing_addr, 0, 6); 2606 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2607 2608 // on error 2609 if (status != ERROR_CODE_SUCCESS){ 2610 #ifdef ENABLE_LE_CENTRAL 2611 if (hci_is_le_connection_type(addr_type)){ 2612 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2613 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2614 } 2615 #endif 2616 // error => outgoing connection failed 2617 if (conn != NULL){ 2618 hci_handle_connection_failed(conn, status); 2619 } 2620 } 2621 } 2622 2623 #ifdef ENABLE_CLASSIC 2624 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2625 uint8_t status = hci_event_command_status_get_status(packet); 2626 log_info("command status (inquiry), status %x", status); 2627 if (status == ERROR_CODE_SUCCESS) { 2628 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2629 } else { 2630 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2631 } 2632 } 2633 #endif 2634 break; 2635 2636 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2637 if (size < 3) return; 2638 uint16_t num_handles = packet[2]; 2639 if (size != (3u + num_handles * 4u)) return; 2640 uint16_t offset = 3; 2641 for (i=0; i<num_handles;i++){ 2642 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2643 offset += 2u; 2644 uint16_t num_packets = little_endian_read_16(packet, offset); 2645 offset += 2u; 2646 2647 conn = hci_connection_for_handle(handle); 2648 if (!conn){ 2649 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2650 continue; 2651 } 2652 2653 if (conn->num_packets_sent >= num_packets){ 2654 conn->num_packets_sent -= num_packets; 2655 } else { 2656 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2657 conn->num_packets_sent = 0; 2658 } 2659 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2660 2661 #ifdef ENABLE_CLASSIC 2662 // For SCO, we do the can_send_now_check here 2663 hci_notify_if_sco_can_send_now(); 2664 #endif 2665 } 2666 break; 2667 } 2668 2669 #ifdef ENABLE_CLASSIC 2670 case HCI_EVENT_INQUIRY_COMPLETE: 2671 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2672 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2673 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2674 hci_emit_event(event, sizeof(event), 1); 2675 } 2676 break; 2677 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2678 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2679 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2680 } 2681 break; 2682 case HCI_EVENT_CONNECTION_REQUEST: 2683 reverse_bd_addr(&packet[2], addr); 2684 link_type = (hci_link_type_t) packet[11]; 2685 2686 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2687 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2688 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2689 bd_addr_copy(hci_stack->decline_addr, addr); 2690 break; 2691 } 2692 2693 if (hci_stack->gap_classic_accept_callback != NULL){ 2694 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2695 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2696 bd_addr_copy(hci_stack->decline_addr, addr); 2697 break; 2698 } 2699 } 2700 2701 // TODO: eval COD 8-10 2702 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2703 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2704 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2705 if (!conn) { 2706 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2707 } 2708 if (!conn) { 2709 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2710 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2711 bd_addr_copy(hci_stack->decline_addr, addr); 2712 break; 2713 } 2714 conn->role = HCI_ROLE_SLAVE; 2715 conn->state = RECEIVED_CONNECTION_REQUEST; 2716 // store info about eSCO 2717 if (link_type == HCI_LINK_TYPE_ESCO){ 2718 conn->remote_supported_features[0] |= 1; 2719 } 2720 hci_run(); 2721 break; 2722 2723 case HCI_EVENT_CONNECTION_COMPLETE: 2724 // Connection management 2725 reverse_bd_addr(&packet[5], addr); 2726 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2727 addr_type = BD_ADDR_TYPE_ACL; 2728 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2729 if (conn) { 2730 if (!packet[2]){ 2731 conn->state = OPEN; 2732 conn->con_handle = little_endian_read_16(packet, 3); 2733 2734 // queue get remote feature 2735 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2736 2737 // queue set supervision timeout if we're master 2738 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2739 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2740 } 2741 2742 // restart timer 2743 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2744 btstack_run_loop_add_timer(&conn->timeout); 2745 2746 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2747 2748 hci_emit_nr_connections_changed(); 2749 } else { 2750 // connection failed 2751 hci_handle_connection_failed(conn, packet[2]); 2752 } 2753 } 2754 break; 2755 2756 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2757 reverse_bd_addr(&packet[5], addr); 2758 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2759 if (packet[2]){ 2760 // connection failed 2761 break; 2762 } 2763 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2764 if (!conn) { 2765 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2766 } 2767 if (!conn) { 2768 break; 2769 } 2770 conn->state = OPEN; 2771 conn->con_handle = little_endian_read_16(packet, 3); 2772 2773 #ifdef ENABLE_SCO_OVER_HCI 2774 // update SCO 2775 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2776 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2777 } 2778 // trigger can send now 2779 if (hci_have_usb_transport()){ 2780 hci_stack->sco_can_send_now = true; 2781 } 2782 #endif 2783 #ifdef HAVE_SCO_TRANSPORT 2784 // configure sco transport 2785 if (hci_stack->sco_transport != NULL){ 2786 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2787 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2788 } 2789 #endif 2790 break; 2791 2792 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2793 handle = little_endian_read_16(packet, 3); 2794 conn = hci_connection_for_handle(handle); 2795 if (!conn) break; 2796 if (!packet[2]){ 2797 const uint8_t * features = &packet[5]; 2798 hci_handle_remote_features_page_0(conn, features); 2799 2800 // read extended features if possible 2801 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2802 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2803 break; 2804 } 2805 } 2806 hci_handle_remote_features_received(conn); 2807 break; 2808 2809 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2810 handle = little_endian_read_16(packet, 3); 2811 conn = hci_connection_for_handle(handle); 2812 if (!conn) break; 2813 // status = ok, page = 1 2814 if (!packet[2]) { 2815 uint8_t page_number = packet[5]; 2816 uint8_t maximum_page_number = packet[6]; 2817 const uint8_t * features = &packet[7]; 2818 bool done = false; 2819 switch (page_number){ 2820 case 1: 2821 hci_handle_remote_features_page_1(conn, features); 2822 if (maximum_page_number >= 2){ 2823 // get Secure Connections (Controller) from Page 2 if available 2824 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2825 } else { 2826 // otherwise, assume SC (Controller) == SC (Host) 2827 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2828 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2829 } 2830 done = true; 2831 } 2832 break; 2833 case 2: 2834 hci_handle_remote_features_page_2(conn, features); 2835 done = true; 2836 break; 2837 default: 2838 break; 2839 } 2840 if (!done) break; 2841 } 2842 hci_handle_remote_features_received(conn); 2843 break; 2844 2845 case HCI_EVENT_LINK_KEY_REQUEST: 2846 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2847 hci_event_link_key_request_get_bd_addr(packet, addr); 2848 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2849 if (!conn) break; 2850 2851 // lookup link key in db if not cached 2852 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2853 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2854 } 2855 2856 // response sent by hci_run() 2857 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2858 #endif 2859 break; 2860 2861 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2862 hci_event_link_key_request_get_bd_addr(packet, addr); 2863 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2864 if (!conn) break; 2865 2866 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2867 2868 // CVE-2020-26555: ignore NULL link key 2869 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2870 if (btstack_is_null(&packet[8], 16)) break; 2871 2872 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2873 // Change Connection Encryption keeps link key type 2874 if (link_key_type != CHANGED_COMBINATION_KEY){ 2875 conn->link_key_type = link_key_type; 2876 } 2877 2878 // cache link key. link keys stored in little-endian format for legacy reasons 2879 memcpy(&conn->link_key, &packet[8], 16); 2880 2881 // only store link key: 2882 // - if bondable enabled 2883 if (hci_stack->bondable == false) break; 2884 // - if security level sufficient 2885 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2886 // - for SSP, also check if remote side requested bonding as well 2887 if (conn->link_key_type != COMBINATION_KEY){ 2888 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2889 if (!remote_bonding){ 2890 break; 2891 } 2892 } 2893 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2894 break; 2895 } 2896 2897 case HCI_EVENT_PIN_CODE_REQUEST: 2898 hci_event_pin_code_request_get_bd_addr(packet, addr); 2899 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2900 if (!conn) break; 2901 2902 hci_pairing_started(conn, false); 2903 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2904 if (!hci_stack->bondable ){ 2905 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2906 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2907 hci_run(); 2908 return; 2909 } 2910 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2911 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2912 log_info("Level 4 required, but SC not supported -> abort"); 2913 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2914 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2915 hci_run(); 2916 return; 2917 } 2918 break; 2919 2920 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2921 hci_event_io_capability_response_get_bd_addr(packet, addr); 2922 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2923 if (!conn) break; 2924 2925 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2926 hci_pairing_started(conn, true); 2927 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2928 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2929 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2930 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2931 #endif 2932 break; 2933 2934 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2935 hci_event_io_capability_response_get_bd_addr(packet, addr); 2936 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2937 if (!conn) break; 2938 2939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2940 hci_connection_timestamp(conn); 2941 hci_pairing_started(conn, true); 2942 break; 2943 2944 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2945 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2946 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2947 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2948 if (!conn) break; 2949 2950 hci_connection_timestamp(conn); 2951 2952 hci_pairing_started(conn, true); 2953 2954 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2955 break; 2956 #endif 2957 2958 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2959 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2960 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2961 if (!conn) break; 2962 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2963 if (hci_stack->ssp_auto_accept){ 2964 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2965 }; 2966 } else { 2967 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2968 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2969 // don't forward event to app 2970 hci_run(); 2971 return; 2972 } 2973 break; 2974 2975 case HCI_EVENT_USER_PASSKEY_REQUEST: 2976 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2977 if (hci_stack->ssp_auto_accept){ 2978 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2979 }; 2980 break; 2981 2982 case HCI_EVENT_MODE_CHANGE: 2983 handle = hci_event_mode_change_get_handle(packet); 2984 conn = hci_connection_for_handle(handle); 2985 if (!conn) break; 2986 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2987 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2988 break; 2989 #endif 2990 2991 case HCI_EVENT_ENCRYPTION_CHANGE: 2992 handle = hci_event_encryption_change_get_connection_handle(packet); 2993 conn = hci_connection_for_handle(handle); 2994 if (!conn) break; 2995 if (hci_event_encryption_change_get_status(packet) == 0u) { 2996 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2997 if (encryption_enabled){ 2998 if (hci_is_le_connection(conn)){ 2999 // For LE, we accept connection as encrypted 3000 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3001 } 3002 #ifdef ENABLE_CLASSIC 3003 else { 3004 3005 // dedicated bonding: send result and disconnect 3006 if (conn->bonding_flags & BONDING_DEDICATED){ 3007 conn->bonding_flags &= ~BONDING_DEDICATED; 3008 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3009 conn->bonding_status = packet[2]; 3010 break; 3011 } 3012 3013 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3014 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3015 bool connected_uses_aes_ccm = encryption_enabled == 2; 3016 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3017 log_info("SC during pairing, but only E0 now -> abort"); 3018 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3019 break; 3020 } 3021 3022 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3023 if (connected_uses_aes_ccm){ 3024 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3025 } 3026 3027 #ifdef ENABLE_TESTING_SUPPORT 3028 // work around for issue with PTS dongle 3029 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3030 #endif 3031 3032 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3033 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3034 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3035 } else { 3036 // if not, pretend everything is perfect 3037 hci_handle_read_encryption_key_size_complete(conn, 16); 3038 } 3039 } 3040 #endif 3041 } else { 3042 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3043 } 3044 } 3045 3046 break; 3047 3048 #ifdef ENABLE_CLASSIC 3049 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3050 handle = hci_event_authentication_complete_get_connection_handle(packet); 3051 conn = hci_connection_for_handle(handle); 3052 if (!conn) break; 3053 3054 // clear authentication active flag 3055 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3056 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3057 3058 // authenticated only if auth status == 0 3059 if (hci_event_authentication_complete_get_status(packet) == 0){ 3060 // authenticated 3061 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3062 3063 // If not already encrypted, start encryption 3064 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3065 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3066 break; 3067 } 3068 } 3069 3070 // emit updated security level 3071 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3072 break; 3073 3074 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3075 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3076 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3077 if (!conn) break; 3078 3079 // treat successfully paired connection as authenticated 3080 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3081 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3082 } 3083 3084 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3085 break; 3086 #endif 3087 3088 // HCI_EVENT_DISCONNECTION_COMPLETE 3089 // has been split, to first notify stack before shutting connection down 3090 // see end of function, too. 3091 case HCI_EVENT_DISCONNECTION_COMPLETE: 3092 if (packet[2]) break; // status != 0 3093 handle = little_endian_read_16(packet, 3); 3094 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3095 if (hci_stack->acl_fragmentation_total_size > 0u) { 3096 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3097 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3098 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3099 hci_stack->acl_fragmentation_total_size = 0; 3100 hci_stack->acl_fragmentation_pos = 0; 3101 if (release_buffer){ 3102 hci_release_packet_buffer(); 3103 } 3104 } 3105 } 3106 3107 conn = hci_connection_for_handle(handle); 3108 if (!conn) break; 3109 #ifdef ENABLE_CLASSIC 3110 // pairing failed if it was ongoing 3111 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3112 #endif 3113 3114 // emit dedicatd bonding event 3115 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3116 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3117 } 3118 3119 // mark connection for shutdown, stop timers, reset state 3120 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3121 hci_connection_stop_timer(conn); 3122 hci_connection_init(conn); 3123 3124 #ifdef ENABLE_BLE 3125 #ifdef ENABLE_LE_PERIPHERAL 3126 // re-enable advertisements for le connections if active 3127 if (hci_is_le_connection(conn)){ 3128 hci_update_advertisements_enabled_for_current_roles(); 3129 } 3130 #endif 3131 #endif 3132 break; 3133 3134 case HCI_EVENT_HARDWARE_ERROR: 3135 log_error("Hardware Error: 0x%02x", packet[2]); 3136 if (hci_stack->hardware_error_callback){ 3137 (*hci_stack->hardware_error_callback)(packet[2]); 3138 } else { 3139 // if no special requests, just reboot stack 3140 hci_power_control_off(); 3141 hci_power_control_on(); 3142 } 3143 break; 3144 3145 #ifdef ENABLE_CLASSIC 3146 case HCI_EVENT_ROLE_CHANGE: 3147 if (packet[2]) break; // status != 0 3148 reverse_bd_addr(&packet[3], addr); 3149 addr_type = BD_ADDR_TYPE_ACL; 3150 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3151 if (!conn) break; 3152 conn->role = packet[9]; 3153 break; 3154 #endif 3155 3156 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3157 // release packet buffer only for asynchronous transport and if there are not further fragements 3158 if (hci_transport_synchronous()) { 3159 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3160 return; // instead of break: to avoid re-entering hci_run() 3161 } 3162 hci_stack->acl_fragmentation_tx_active = 0; 3163 if (hci_stack->acl_fragmentation_total_size) break; 3164 hci_release_packet_buffer(); 3165 3166 // L2CAP receives this event via the hci_emit_event below 3167 3168 #ifdef ENABLE_CLASSIC 3169 // For SCO, we do the can_send_now_check here 3170 hci_notify_if_sco_can_send_now(); 3171 #endif 3172 break; 3173 3174 #ifdef ENABLE_CLASSIC 3175 case HCI_EVENT_SCO_CAN_SEND_NOW: 3176 // For SCO, we do the can_send_now_check here 3177 hci_stack->sco_can_send_now = true; 3178 hci_notify_if_sco_can_send_now(); 3179 return; 3180 3181 // explode inquriy results for easier consumption 3182 case HCI_EVENT_INQUIRY_RESULT: 3183 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3184 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3185 gap_inquiry_explode(packet, size); 3186 break; 3187 #endif 3188 3189 #ifdef ENABLE_BLE 3190 case HCI_EVENT_LE_META: 3191 switch (packet[2]){ 3192 #ifdef ENABLE_LE_CENTRAL 3193 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3194 // log_info("advertising report received"); 3195 if (!hci_stack->le_scanning_enabled) break; 3196 le_handle_advertisement_report(packet, size); 3197 break; 3198 #endif 3199 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3200 event_handle_le_connection_complete(packet); 3201 break; 3202 3203 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3204 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3205 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3206 conn = hci_connection_for_handle(handle); 3207 if (!conn) break; 3208 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3209 break; 3210 3211 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3212 // connection 3213 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3214 conn = hci_connection_for_handle(handle); 3215 if (conn) { 3216 // read arguments 3217 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3218 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3219 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3220 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3221 3222 // validate against current connection parameter range 3223 le_connection_parameter_range_t existing_range; 3224 gap_get_connection_parameter_range(&existing_range); 3225 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3226 if (update_parameter){ 3227 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3228 conn->le_conn_interval_min = le_conn_interval_min; 3229 conn->le_conn_interval_max = le_conn_interval_max; 3230 conn->le_conn_latency = le_conn_latency; 3231 conn->le_supervision_timeout = le_supervision_timeout; 3232 } else { 3233 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3234 } 3235 } 3236 break; 3237 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3238 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3239 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3240 conn = hci_connection_for_handle(handle); 3241 if (conn) { 3242 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3243 } 3244 break; 3245 #endif 3246 default: 3247 break; 3248 } 3249 break; 3250 #endif 3251 case HCI_EVENT_VENDOR_SPECIFIC: 3252 // Vendor specific commands often create vendor specific event instead of num completed packets 3253 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3254 switch (hci_stack->manufacturer){ 3255 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3256 hci_stack->num_cmd_packets = 1; 3257 break; 3258 default: 3259 break; 3260 } 3261 break; 3262 default: 3263 break; 3264 } 3265 3266 handle_event_for_current_stack_state(packet, size); 3267 3268 // notify upper stack 3269 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3270 3271 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3272 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3273 handle = little_endian_read_16(packet, 3); 3274 hci_connection_t * aConn = hci_connection_for_handle(handle); 3275 // discard connection if app did not trigger a reconnect in the event handler 3276 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3277 hci_shutdown_connection(aConn); 3278 } 3279 } 3280 3281 // execute main loop 3282 hci_run(); 3283 } 3284 3285 #ifdef ENABLE_CLASSIC 3286 3287 #ifdef ENABLE_SCO_OVER_HCI 3288 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3289 static void sco_schedule_tx(hci_connection_t * conn); 3290 3291 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3292 log_debug("SCO TX Timeout"); 3293 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3294 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3295 if (!conn) return; 3296 3297 // trigger send 3298 conn->sco_tx_ready = 1; 3299 // extra packet if CVSD but SCO buffer is too short 3300 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3301 conn->sco_tx_ready++; 3302 } 3303 hci_notify_if_sco_can_send_now(); 3304 } 3305 3306 3307 #define SCO_TX_AFTER_RX_MS (6) 3308 3309 static void sco_schedule_tx(hci_connection_t * conn){ 3310 3311 uint32_t now = btstack_run_loop_get_time_ms(); 3312 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3313 int time_delta_ms = sco_tx_ms - now; 3314 3315 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3316 3317 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3318 btstack_run_loop_remove_timer(timer); 3319 btstack_run_loop_set_timer(timer, time_delta_ms); 3320 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3321 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3322 btstack_run_loop_add_timer(timer); 3323 } 3324 #endif 3325 3326 static void sco_handler(uint8_t * packet, uint16_t size){ 3327 // lookup connection struct 3328 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3329 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3330 if (!conn) return; 3331 3332 #ifdef ENABLE_SCO_OVER_HCI 3333 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3334 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3335 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3336 packet[2] = 0x3c; 3337 memmove(&packet[3], &packet[23], 63); 3338 size = 63; 3339 } 3340 } 3341 3342 if (hci_have_usb_transport()){ 3343 // Nothing to do 3344 } else { 3345 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 3346 if (hci_stack->synchronous_flow_control_enabled == 0){ 3347 uint32_t now = btstack_run_loop_get_time_ms(); 3348 3349 if (!conn->sco_rx_valid){ 3350 // ignore first 10 packets 3351 conn->sco_rx_count++; 3352 // log_debug("sco rx count %u", conn->sco_rx_count); 3353 if (conn->sco_rx_count == 10) { 3354 // use first timestamp as is and pretent it just started 3355 conn->sco_rx_ms = now; 3356 conn->sco_rx_valid = 1; 3357 conn->sco_rx_count = 0; 3358 sco_schedule_tx(conn); 3359 } 3360 } else { 3361 // track expected arrival timme 3362 conn->sco_rx_count++; 3363 conn->sco_rx_ms += 7; 3364 int delta = (int32_t) (now - conn->sco_rx_ms); 3365 if (delta > 0){ 3366 conn->sco_rx_ms++; 3367 } 3368 // log_debug("sco rx %u", conn->sco_rx_ms); 3369 sco_schedule_tx(conn); 3370 } 3371 } 3372 } 3373 #endif 3374 3375 // deliver to app 3376 if (hci_stack->sco_packet_handler) { 3377 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3378 } 3379 3380 #ifdef HAVE_SCO_TRANSPORT 3381 // We can send one packet for each received packet 3382 conn->sco_tx_ready++; 3383 hci_notify_if_sco_can_send_now(); 3384 #endif 3385 3386 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3387 conn->num_packets_completed++; 3388 hci_stack->host_completed_packets = 1; 3389 hci_run(); 3390 #endif 3391 } 3392 #endif 3393 3394 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3395 hci_dump_packet(packet_type, 1, packet, size); 3396 switch (packet_type) { 3397 case HCI_EVENT_PACKET: 3398 event_handler(packet, size); 3399 break; 3400 case HCI_ACL_DATA_PACKET: 3401 acl_handler(packet, size); 3402 break; 3403 #ifdef ENABLE_CLASSIC 3404 case HCI_SCO_DATA_PACKET: 3405 sco_handler(packet, size); 3406 break; 3407 #endif 3408 default: 3409 break; 3410 } 3411 } 3412 3413 /** 3414 * @brief Add event packet handler. 3415 */ 3416 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3417 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3418 } 3419 3420 3421 /** Register HCI packet handlers */ 3422 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3423 hci_stack->acl_packet_handler = handler; 3424 } 3425 3426 #ifdef ENABLE_CLASSIC 3427 /** 3428 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3429 */ 3430 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3431 hci_stack->sco_packet_handler = handler; 3432 } 3433 #endif 3434 3435 static void hci_state_reset(void){ 3436 // no connections yet 3437 hci_stack->connections = NULL; 3438 3439 // keep discoverable/connectable as this has been requested by the client(s) 3440 // hci_stack->discoverable = 0; 3441 // hci_stack->connectable = 0; 3442 // hci_stack->bondable = 1; 3443 // hci_stack->own_addr_type = 0; 3444 3445 // buffer is free 3446 hci_stack->hci_packet_buffer_reserved = false; 3447 3448 // no pending cmds 3449 hci_stack->decline_reason = 0; 3450 3451 hci_stack->secure_connections_active = false; 3452 3453 #ifdef ENABLE_CLASSIC 3454 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3455 hci_stack->gap_tasks = 3456 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3457 GAP_TASK_SET_CLASS_OF_DEVICE | 3458 GAP_TASK_SET_LOCAL_NAME | 3459 GAP_TASK_SET_EIR_DATA | 3460 GAP_TASK_WRITE_SCAN_ENABLE; 3461 #endif 3462 3463 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3464 hci_stack->classic_read_local_oob_data = true; 3465 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3466 #endif 3467 3468 // LE 3469 #ifdef ENABLE_BLE 3470 memset(hci_stack->le_random_address, 0, 6); 3471 hci_stack->le_random_address_set = 0; 3472 #endif 3473 #ifdef ENABLE_LE_CENTRAL 3474 hci_stack->le_scanning_active = false; 3475 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3476 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3477 hci_stack->le_whitelist_capacity = 0; 3478 #endif 3479 #ifdef ENABLE_LE_PERIPHERAL 3480 hci_stack->le_advertisements_active = false; 3481 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3482 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3483 } 3484 if (hci_stack->le_advertisements_data != NULL){ 3485 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3486 } 3487 #endif 3488 } 3489 3490 #ifdef ENABLE_CLASSIC 3491 /** 3492 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3493 */ 3494 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3495 // store and open remote device db 3496 hci_stack->link_key_db = link_key_db; 3497 if (hci_stack->link_key_db) { 3498 hci_stack->link_key_db->open(); 3499 } 3500 } 3501 #endif 3502 3503 void hci_init(const hci_transport_t *transport, const void *config){ 3504 3505 #ifdef HAVE_MALLOC 3506 if (!hci_stack) { 3507 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3508 } 3509 #else 3510 hci_stack = &hci_stack_static; 3511 #endif 3512 memset(hci_stack, 0, sizeof(hci_stack_t)); 3513 3514 // reference to use transport layer implementation 3515 hci_stack->hci_transport = transport; 3516 3517 // reference to used config 3518 hci_stack->config = config; 3519 3520 // setup pointer for outgoing packet buffer 3521 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3522 3523 // max acl payload size defined in config.h 3524 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3525 3526 // register packet handlers with transport 3527 transport->register_packet_handler(&packet_handler); 3528 3529 hci_stack->state = HCI_STATE_OFF; 3530 3531 // class of device 3532 hci_stack->class_of_device = 0x007a020c; // Smartphone 3533 3534 // bondable by default 3535 hci_stack->bondable = 1; 3536 3537 #ifdef ENABLE_CLASSIC 3538 // classic name 3539 hci_stack->local_name = default_classic_name; 3540 3541 // Master slave policy 3542 hci_stack->master_slave_policy = 1; 3543 3544 // Allow Role Switch 3545 hci_stack->allow_role_switch = 1; 3546 3547 // Default / minimum security level = 2 3548 hci_stack->gap_security_level = LEVEL_2; 3549 3550 // Default Security Mode 4 3551 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3552 3553 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3554 hci_stack->gap_required_encyrption_key_size = 7; 3555 3556 // Link Supervision Timeout 3557 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3558 3559 #endif 3560 3561 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3562 hci_stack->ssp_enable = 1; 3563 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3564 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3565 hci_stack->ssp_auto_accept = 1; 3566 3567 // Secure Connections: enable (requires support from Controller) 3568 hci_stack->secure_connections_enable = true; 3569 3570 // voice setting - signed 16 bit pcm data with CVSD over the air 3571 hci_stack->sco_voice_setting = 0x60; 3572 3573 #ifdef ENABLE_LE_CENTRAL 3574 // connection parameter to use for outgoing connections 3575 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3576 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3577 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3578 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3579 hci_stack->le_connection_latency = 4; // 4 3580 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3581 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3582 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3583 3584 // default LE Scanning 3585 hci_stack->le_scan_type = 0x1; // active 3586 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3587 hci_stack->le_scan_window = 0x30; // 30 ms 3588 #endif 3589 3590 #ifdef ENABLE_LE_PERIPHERAL 3591 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3592 #endif 3593 3594 // connection parameter range used to answer connection parameter update requests in l2cap 3595 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3596 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3597 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3598 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3599 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3600 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3601 3602 hci_state_reset(); 3603 } 3604 3605 void hci_deinit(void){ 3606 #ifdef HAVE_MALLOC 3607 if (hci_stack) { 3608 free(hci_stack); 3609 } 3610 #endif 3611 hci_stack = NULL; 3612 3613 #ifdef ENABLE_CLASSIC 3614 disable_l2cap_timeouts = 0; 3615 #endif 3616 } 3617 3618 /** 3619 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3620 */ 3621 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3622 hci_stack->chipset = chipset_driver; 3623 3624 // reset chipset driver - init is also called on power_up 3625 if (hci_stack->chipset && hci_stack->chipset->init){ 3626 hci_stack->chipset->init(hci_stack->config); 3627 } 3628 } 3629 3630 /** 3631 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3632 */ 3633 void hci_set_control(const btstack_control_t *hardware_control){ 3634 // references to used control implementation 3635 hci_stack->control = hardware_control; 3636 // init with transport config 3637 hardware_control->init(hci_stack->config); 3638 } 3639 3640 void hci_close(void){ 3641 3642 #ifdef ENABLE_CLASSIC 3643 // close remote device db 3644 if (hci_stack->link_key_db) { 3645 hci_stack->link_key_db->close(); 3646 } 3647 #endif 3648 3649 btstack_linked_list_iterator_t lit; 3650 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3651 while (btstack_linked_list_iterator_has_next(&lit)){ 3652 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3653 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3654 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3655 hci_shutdown_connection(connection); 3656 } 3657 3658 hci_power_control(HCI_POWER_OFF); 3659 3660 #ifdef HAVE_MALLOC 3661 free(hci_stack); 3662 #endif 3663 hci_stack = NULL; 3664 } 3665 3666 #ifdef HAVE_SCO_TRANSPORT 3667 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3668 hci_stack->sco_transport = sco_transport; 3669 sco_transport->register_packet_handler(&packet_handler); 3670 } 3671 #endif 3672 3673 #ifdef ENABLE_CLASSIC 3674 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3675 // validate ranage and set 3676 if (encryption_key_size < 7) return; 3677 if (encryption_key_size > 16) return; 3678 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3679 } 3680 3681 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3682 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3683 hci_stack->gap_security_mode = security_mode; 3684 return ERROR_CODE_SUCCESS; 3685 } else { 3686 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3687 } 3688 } 3689 3690 gap_security_mode_t gap_get_security_mode(void){ 3691 return hci_stack->gap_security_mode; 3692 } 3693 3694 void gap_set_security_level(gap_security_level_t security_level){ 3695 hci_stack->gap_security_level = security_level; 3696 } 3697 3698 gap_security_level_t gap_get_security_level(void){ 3699 if (hci_stack->gap_secure_connections_only_mode){ 3700 return LEVEL_4; 3701 } 3702 return hci_stack->gap_security_level; 3703 } 3704 3705 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3706 hci_stack->gap_minimal_service_security_level = security_level; 3707 } 3708 3709 void gap_set_secure_connections_only_mode(bool enable){ 3710 hci_stack->gap_secure_connections_only_mode = enable; 3711 } 3712 3713 bool gap_get_secure_connections_only_mode(void){ 3714 return hci_stack->gap_secure_connections_only_mode; 3715 } 3716 #endif 3717 3718 #ifdef ENABLE_CLASSIC 3719 void gap_set_class_of_device(uint32_t class_of_device){ 3720 hci_stack->class_of_device = class_of_device; 3721 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3722 hci_run(); 3723 } 3724 3725 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3726 hci_stack->default_link_policy_settings = default_link_policy_settings; 3727 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3728 hci_run(); 3729 } 3730 3731 void gap_set_allow_role_switch(bool allow_role_switch){ 3732 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3733 } 3734 3735 uint8_t hci_get_allow_role_switch(void){ 3736 return hci_stack->allow_role_switch; 3737 } 3738 3739 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3740 hci_stack->link_supervision_timeout = link_supervision_timeout; 3741 } 3742 3743 void hci_disable_l2cap_timeout_check(void){ 3744 disable_l2cap_timeouts = 1; 3745 } 3746 #endif 3747 3748 #ifndef HAVE_HOST_CONTROLLER_API 3749 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3750 void hci_set_bd_addr(bd_addr_t addr){ 3751 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3752 hci_stack->custom_bd_addr_set = 1; 3753 } 3754 #endif 3755 3756 // State-Module-Driver overview 3757 // state module low-level 3758 // HCI_STATE_OFF off close 3759 // HCI_STATE_INITIALIZING, on open 3760 // HCI_STATE_WORKING, on open 3761 // HCI_STATE_HALTING, on open 3762 // HCI_STATE_SLEEPING, off/sleep close 3763 // HCI_STATE_FALLING_ASLEEP on open 3764 3765 static int hci_power_control_on(void){ 3766 3767 // power on 3768 int err = 0; 3769 if (hci_stack->control && hci_stack->control->on){ 3770 err = (*hci_stack->control->on)(); 3771 } 3772 if (err){ 3773 log_error( "POWER_ON failed"); 3774 hci_emit_hci_open_failed(); 3775 return err; 3776 } 3777 3778 // int chipset driver 3779 if (hci_stack->chipset && hci_stack->chipset->init){ 3780 hci_stack->chipset->init(hci_stack->config); 3781 } 3782 3783 // init transport 3784 if (hci_stack->hci_transport->init){ 3785 hci_stack->hci_transport->init(hci_stack->config); 3786 } 3787 3788 // open transport 3789 err = hci_stack->hci_transport->open(); 3790 if (err){ 3791 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3792 if (hci_stack->control && hci_stack->control->off){ 3793 (*hci_stack->control->off)(); 3794 } 3795 hci_emit_hci_open_failed(); 3796 return err; 3797 } 3798 return 0; 3799 } 3800 3801 static void hci_power_control_off(void){ 3802 3803 log_info("hci_power_control_off"); 3804 3805 // close low-level device 3806 hci_stack->hci_transport->close(); 3807 3808 log_info("hci_power_control_off - hci_transport closed"); 3809 3810 // power off 3811 if (hci_stack->control && hci_stack->control->off){ 3812 (*hci_stack->control->off)(); 3813 } 3814 3815 log_info("hci_power_control_off - control closed"); 3816 3817 hci_stack->state = HCI_STATE_OFF; 3818 } 3819 3820 static void hci_power_control_sleep(void){ 3821 3822 log_info("hci_power_control_sleep"); 3823 3824 #if 0 3825 // don't close serial port during sleep 3826 3827 // close low-level device 3828 hci_stack->hci_transport->close(hci_stack->config); 3829 #endif 3830 3831 // sleep mode 3832 if (hci_stack->control && hci_stack->control->sleep){ 3833 (*hci_stack->control->sleep)(); 3834 } 3835 3836 hci_stack->state = HCI_STATE_SLEEPING; 3837 } 3838 3839 static int hci_power_control_wake(void){ 3840 3841 log_info("hci_power_control_wake"); 3842 3843 // wake on 3844 if (hci_stack->control && hci_stack->control->wake){ 3845 (*hci_stack->control->wake)(); 3846 } 3847 3848 #if 0 3849 // open low-level device 3850 int err = hci_stack->hci_transport->open(hci_stack->config); 3851 if (err){ 3852 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3853 if (hci_stack->control && hci_stack->control->off){ 3854 (*hci_stack->control->off)(); 3855 } 3856 hci_emit_hci_open_failed(); 3857 return err; 3858 } 3859 #endif 3860 3861 return 0; 3862 } 3863 3864 static void hci_power_transition_to_initializing(void){ 3865 // set up state machine 3866 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3867 hci_stack->hci_packet_buffer_reserved = false; 3868 hci_stack->state = HCI_STATE_INITIALIZING; 3869 hci_stack->substate = HCI_INIT_SEND_RESET; 3870 } 3871 3872 // returns error 3873 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3874 int err; 3875 switch (power_mode){ 3876 case HCI_POWER_ON: 3877 err = hci_power_control_on(); 3878 if (err != 0) { 3879 log_error("hci_power_control_on() error %d", err); 3880 return err; 3881 } 3882 hci_power_transition_to_initializing(); 3883 break; 3884 case HCI_POWER_OFF: 3885 // do nothing 3886 break; 3887 case HCI_POWER_SLEEP: 3888 // do nothing (with SLEEP == OFF) 3889 break; 3890 default: 3891 btstack_assert(false); 3892 break; 3893 } 3894 return ERROR_CODE_SUCCESS; 3895 } 3896 3897 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3898 switch (power_mode){ 3899 case HCI_POWER_ON: 3900 // do nothing 3901 break; 3902 case HCI_POWER_OFF: 3903 // no connections yet, just turn it off 3904 hci_power_control_off(); 3905 break; 3906 case HCI_POWER_SLEEP: 3907 // no connections yet, just turn it off 3908 hci_power_control_sleep(); 3909 break; 3910 default: 3911 btstack_assert(false); 3912 break; 3913 } 3914 return ERROR_CODE_SUCCESS; 3915 } 3916 3917 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3918 switch (power_mode){ 3919 case HCI_POWER_ON: 3920 // do nothing 3921 break; 3922 case HCI_POWER_OFF: 3923 // see hci_run 3924 hci_stack->state = HCI_STATE_HALTING; 3925 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3926 break; 3927 case HCI_POWER_SLEEP: 3928 // see hci_run 3929 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3930 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 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_halting(HCI_POWER_MODE power_mode) { 3940 switch (power_mode){ 3941 case HCI_POWER_ON: 3942 hci_power_transition_to_initializing(); 3943 break; 3944 case HCI_POWER_OFF: 3945 // do nothing 3946 break; 3947 case HCI_POWER_SLEEP: 3948 // see hci_run 3949 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3950 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3951 break; 3952 default: 3953 btstack_assert(false); 3954 break; 3955 } 3956 return ERROR_CODE_SUCCESS; 3957 } 3958 3959 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3960 switch (power_mode){ 3961 case HCI_POWER_ON: 3962 hci_power_transition_to_initializing(); 3963 break; 3964 case HCI_POWER_OFF: 3965 // see hci_run 3966 hci_stack->state = HCI_STATE_HALTING; 3967 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3968 break; 3969 case HCI_POWER_SLEEP: 3970 // do nothing 3971 break; 3972 default: 3973 btstack_assert(false); 3974 break; 3975 } 3976 return ERROR_CODE_SUCCESS; 3977 } 3978 3979 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3980 int err; 3981 switch (power_mode){ 3982 case HCI_POWER_ON: 3983 err = hci_power_control_wake(); 3984 if (err) return err; 3985 hci_power_transition_to_initializing(); 3986 break; 3987 case HCI_POWER_OFF: 3988 hci_stack->state = HCI_STATE_HALTING; 3989 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3990 break; 3991 case HCI_POWER_SLEEP: 3992 // do nothing 3993 break; 3994 default: 3995 btstack_assert(false); 3996 break; 3997 } 3998 return ERROR_CODE_SUCCESS; 3999 } 4000 4001 int hci_power_control(HCI_POWER_MODE power_mode){ 4002 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4003 int err = 0; 4004 switch (hci_stack->state){ 4005 case HCI_STATE_OFF: 4006 err = hci_power_control_state_off(power_mode); 4007 break; 4008 case HCI_STATE_INITIALIZING: 4009 err = hci_power_control_state_initializing(power_mode); 4010 break; 4011 case HCI_STATE_WORKING: 4012 err = hci_power_control_state_working(power_mode); 4013 break; 4014 case HCI_STATE_HALTING: 4015 err = hci_power_control_state_halting(power_mode); 4016 break; 4017 case HCI_STATE_FALLING_ASLEEP: 4018 err = hci_power_control_state_falling_asleep(power_mode); 4019 break; 4020 case HCI_STATE_SLEEPING: 4021 err = hci_power_control_state_sleeping(power_mode); 4022 break; 4023 default: 4024 btstack_assert(false); 4025 break; 4026 } 4027 if (err != 0){ 4028 return err; 4029 } 4030 4031 // create internal event 4032 hci_emit_state(); 4033 4034 // trigger next/first action 4035 hci_run(); 4036 4037 return 0; 4038 } 4039 4040 4041 #ifdef ENABLE_CLASSIC 4042 4043 static void hci_update_scan_enable(void){ 4044 // 2 = page scan, 1 = inq scan 4045 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4046 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4047 hci_run(); 4048 } 4049 4050 void gap_discoverable_control(uint8_t enable){ 4051 if (enable) enable = 1; // normalize argument 4052 4053 if (hci_stack->discoverable == enable){ 4054 hci_emit_discoverable_enabled(hci_stack->discoverable); 4055 return; 4056 } 4057 4058 hci_stack->discoverable = enable; 4059 hci_update_scan_enable(); 4060 } 4061 4062 void gap_connectable_control(uint8_t enable){ 4063 if (enable) enable = 1; // normalize argument 4064 4065 // don't emit event 4066 if (hci_stack->connectable == enable) return; 4067 4068 hci_stack->connectable = enable; 4069 hci_update_scan_enable(); 4070 } 4071 #endif 4072 4073 void gap_local_bd_addr(bd_addr_t address_buffer){ 4074 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4075 } 4076 4077 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4078 static void hci_host_num_completed_packets(void){ 4079 4080 // create packet manually as arrays are not supported and num_commands should not get reduced 4081 hci_reserve_packet_buffer(); 4082 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4083 4084 uint16_t size = 0; 4085 uint16_t num_handles = 0; 4086 packet[size++] = 0x35; 4087 packet[size++] = 0x0c; 4088 size++; // skip param len 4089 size++; // skip num handles 4090 4091 // add { handle, packets } entries 4092 btstack_linked_item_t * it; 4093 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4094 hci_connection_t * connection = (hci_connection_t *) it; 4095 if (connection->num_packets_completed){ 4096 little_endian_store_16(packet, size, connection->con_handle); 4097 size += 2; 4098 little_endian_store_16(packet, size, connection->num_packets_completed); 4099 size += 2; 4100 // 4101 num_handles++; 4102 connection->num_packets_completed = 0; 4103 } 4104 } 4105 4106 packet[2] = size - 3; 4107 packet[3] = num_handles; 4108 4109 hci_stack->host_completed_packets = 0; 4110 4111 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4112 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4113 4114 // release packet buffer for synchronous transport implementations 4115 if (hci_transport_synchronous()){ 4116 hci_release_packet_buffer(); 4117 hci_emit_transport_packet_sent(); 4118 } 4119 } 4120 #endif 4121 4122 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4123 UNUSED(ds); 4124 hci_stack->substate = HCI_HALTING_CLOSE; 4125 // allow packet handlers to defer final shutdown 4126 hci_emit_state(); 4127 hci_run(); 4128 } 4129 4130 static bool hci_run_acl_fragments(void){ 4131 if (hci_stack->acl_fragmentation_total_size > 0u) { 4132 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4133 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4134 if (connection) { 4135 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4136 hci_send_acl_packet_fragments(connection); 4137 return true; 4138 } 4139 } else { 4140 // connection gone -> discard further fragments 4141 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4142 hci_stack->acl_fragmentation_total_size = 0; 4143 hci_stack->acl_fragmentation_pos = 0; 4144 } 4145 } 4146 return false; 4147 } 4148 4149 #ifdef ENABLE_CLASSIC 4150 static bool hci_run_general_gap_classic(void){ 4151 4152 // assert stack is working and classic is active 4153 if (hci_classic_supported() == false) return false; 4154 if (hci_stack->state != HCI_STATE_WORKING) return false; 4155 4156 // decline incoming connections 4157 if (hci_stack->decline_reason){ 4158 uint8_t reason = hci_stack->decline_reason; 4159 hci_stack->decline_reason = 0; 4160 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4161 return true; 4162 } 4163 4164 if (hci_stack->gap_tasks != 0){ 4165 hci_run_gap_tasks_classic(); 4166 return true; 4167 } 4168 4169 // start/stop inquiry 4170 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4171 uint8_t duration = hci_stack->inquiry_state; 4172 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4173 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4174 return true; 4175 } 4176 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4177 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4178 hci_send_cmd(&hci_inquiry_cancel); 4179 return true; 4180 } 4181 // remote name request 4182 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4183 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4184 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4185 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4186 return true; 4187 } 4188 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4189 // Local OOB data 4190 if (hci_stack->classic_read_local_oob_data){ 4191 hci_stack->classic_read_local_oob_data = false; 4192 if (hci_stack->local_supported_commands[1] & 0x10u){ 4193 hci_send_cmd(&hci_read_local_extended_oob_data); 4194 } else { 4195 hci_send_cmd(&hci_read_local_oob_data); 4196 } 4197 } 4198 #endif 4199 // pairing 4200 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4201 uint8_t state = hci_stack->gap_pairing_state; 4202 uint8_t pin_code[16]; 4203 switch (state){ 4204 case GAP_PAIRING_STATE_SEND_PIN: 4205 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4206 memset(pin_code, 0, 16); 4207 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4208 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4209 break; 4210 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4211 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4212 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4213 break; 4214 case GAP_PAIRING_STATE_SEND_PASSKEY: 4215 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4216 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4217 break; 4218 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4219 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4220 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4221 break; 4222 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4223 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4224 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4225 break; 4226 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4228 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4229 break; 4230 default: 4231 break; 4232 } 4233 return true; 4234 } 4235 return false; 4236 } 4237 #endif 4238 4239 #ifdef ENABLE_BLE 4240 static bool hci_run_general_gap_le(void){ 4241 4242 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4243 4244 if (hci_stack->state != HCI_STATE_WORKING) return false; 4245 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4246 4247 4248 // Phase 1: collect what to stop 4249 4250 bool scanning_stop = false; 4251 bool connecting_stop = false; 4252 bool advertising_stop = false; 4253 4254 #ifndef ENABLE_LE_CENTRAL 4255 UNUSED(scanning_stop); 4256 UNUSED(connecting_stop); 4257 #endif 4258 #ifndef ENABLE_LE_PERIPHERAL 4259 UNUSED(advertising_stop); 4260 #endif 4261 4262 // check if whitelist needs modification 4263 bool whitelist_modification_pending = false; 4264 btstack_linked_list_iterator_t lit; 4265 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4266 while (btstack_linked_list_iterator_has_next(&lit)){ 4267 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4268 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4269 whitelist_modification_pending = true; 4270 break; 4271 } 4272 } 4273 // check if resolving list needs modification 4274 bool resolving_list_modification_pending = false; 4275 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4276 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4277 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4278 resolving_list_modification_pending = true; 4279 } 4280 #endif 4281 4282 #ifdef ENABLE_LE_CENTRAL 4283 // scanning control 4284 if (hci_stack->le_scanning_active) { 4285 // stop if: 4286 // - parameter change required 4287 // - it's disabled 4288 // - whitelist change required but used for scanning 4289 // - resolving list modified 4290 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4291 if ((hci_stack->le_scanning_param_update) || 4292 !hci_stack->le_scanning_enabled || 4293 scanning_uses_whitelist || 4294 resolving_list_modification_pending){ 4295 4296 scanning_stop = true; 4297 } 4298 } 4299 #endif 4300 4301 #ifdef ENABLE_LE_CENTRAL 4302 // connecting control 4303 bool connecting_with_whitelist; 4304 switch (hci_stack->le_connecting_state){ 4305 case LE_CONNECTING_DIRECT: 4306 case LE_CONNECTING_WHITELIST: 4307 // stop connecting if: 4308 // - connecting uses white and whitelist modification pending 4309 // - if it got disabled 4310 // - resolving list modified 4311 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4312 if ((connecting_with_whitelist && whitelist_modification_pending) || 4313 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4314 resolving_list_modification_pending) { 4315 4316 connecting_stop = true; 4317 } 4318 break; 4319 default: 4320 break; 4321 } 4322 #endif 4323 4324 #ifdef ENABLE_LE_PERIPHERAL 4325 // le advertisement control 4326 if (hci_stack->le_advertisements_active){ 4327 // stop if: 4328 // - parameter change required 4329 // - it's disabled 4330 // - whitelist change required but used for advertisement filter policy 4331 // - resolving list modified 4332 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4333 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4334 if (advertising_change || 4335 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4336 (advertising_uses_whitelist & whitelist_modification_pending) || 4337 resolving_list_modification_pending) { 4338 4339 advertising_stop = true; 4340 } 4341 } 4342 #endif 4343 4344 4345 // Phase 2: stop everything that should be off during modifications 4346 4347 #ifdef ENABLE_LE_CENTRAL 4348 if (scanning_stop){ 4349 hci_stack->le_scanning_active = false; 4350 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4351 return true; 4352 } 4353 #endif 4354 4355 #ifdef ENABLE_LE_CENTRAL 4356 if (connecting_stop){ 4357 hci_send_cmd(&hci_le_create_connection_cancel); 4358 return true; 4359 } 4360 #endif 4361 4362 #ifdef ENABLE_LE_PERIPHERAL 4363 if (advertising_stop){ 4364 hci_stack->le_advertisements_active = false; 4365 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4366 return true; 4367 } 4368 #endif 4369 4370 // Phase 3: modify 4371 4372 #ifdef ENABLE_LE_CENTRAL 4373 if (hci_stack->le_scanning_param_update){ 4374 hci_stack->le_scanning_param_update = false; 4375 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4376 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4377 return true; 4378 } 4379 #endif 4380 4381 #ifdef ENABLE_LE_PERIPHERAL 4382 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4383 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4384 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4385 hci_send_cmd(&hci_le_set_advertising_parameters, 4386 hci_stack->le_advertisements_interval_min, 4387 hci_stack->le_advertisements_interval_max, 4388 hci_stack->le_advertisements_type, 4389 hci_stack->le_advertisements_own_addr_type, 4390 hci_stack->le_advertisements_direct_address_type, 4391 hci_stack->le_advertisements_direct_address, 4392 hci_stack->le_advertisements_channel_map, 4393 hci_stack->le_advertisements_filter_policy); 4394 return true; 4395 } 4396 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4397 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4398 uint8_t adv_data_clean[31]; 4399 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4400 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4401 hci_stack->le_advertisements_data_len); 4402 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4403 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4404 return true; 4405 } 4406 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4407 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4408 uint8_t scan_data_clean[31]; 4409 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4410 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4411 hci_stack->le_scan_response_data_len); 4412 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4413 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4414 return true; 4415 } 4416 #endif 4417 4418 4419 #ifdef ENABLE_LE_CENTRAL 4420 // if connect with whitelist was active and is not cancelled yet, wait until next time 4421 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4422 #endif 4423 4424 // LE Whitelist Management 4425 if (whitelist_modification_pending){ 4426 // add/remove entries 4427 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4428 while (btstack_linked_list_iterator_has_next(&lit)){ 4429 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4430 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4431 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4432 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4433 return true; 4434 } 4435 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4436 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4437 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4438 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4439 return true; 4440 } 4441 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4442 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4443 btstack_memory_whitelist_entry_free(entry); 4444 } 4445 } 4446 } 4447 4448 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4449 // LE Resolving List Management 4450 if (resolving_list_supported) { 4451 uint16_t i; 4452 switch (hci_stack->le_resolving_list_state) { 4453 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4454 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4455 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4456 return true; 4457 case LE_RESOLVING_LIST_READ_SIZE: 4458 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4459 hci_send_cmd(&hci_le_read_resolving_list_size); 4460 return true; 4461 case LE_RESOLVING_LIST_SEND_CLEAR: 4462 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4463 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4464 sizeof(hci_stack->le_resolving_list_add_entries)); 4465 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4466 sizeof(hci_stack->le_resolving_list_remove_entries)); 4467 hci_send_cmd(&hci_le_clear_resolving_list); 4468 return true; 4469 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4470 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4471 uint8_t offset = i >> 3; 4472 uint8_t mask = 1 << (i & 7); 4473 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4474 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4475 bd_addr_t peer_identity_addreses; 4476 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4477 sm_key_t peer_irk; 4478 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4479 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4480 4481 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4482 // trigger whitelist entry 'update' (work around for controller bug) 4483 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4484 while (btstack_linked_list_iterator_has_next(&lit)) { 4485 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4486 if (entry->address_type != peer_identity_addr_type) continue; 4487 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4488 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4489 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4490 } 4491 #endif 4492 4493 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4494 peer_identity_addreses); 4495 return true; 4496 } 4497 4498 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4499 4500 /* fall through */ 4501 4502 case LE_RESOLVING_LIST_ADD_ENTRIES: 4503 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4504 uint8_t offset = i >> 3; 4505 uint8_t mask = 1 << (i & 7); 4506 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4507 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4508 bd_addr_t peer_identity_addreses; 4509 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4510 sm_key_t peer_irk; 4511 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4512 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4513 const uint8_t *local_irk = gap_get_persistent_irk(); 4514 // command uses format specifier 'P' that stores 16-byte value without flip 4515 uint8_t local_irk_flipped[16]; 4516 uint8_t peer_irk_flipped[16]; 4517 reverse_128(local_irk, local_irk_flipped); 4518 reverse_128(peer_irk, peer_irk_flipped); 4519 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4520 peer_irk_flipped, local_irk_flipped); 4521 return true; 4522 } 4523 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4524 break; 4525 4526 default: 4527 break; 4528 } 4529 } 4530 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4531 #endif 4532 4533 // Phase 4: restore state 4534 4535 #ifdef ENABLE_LE_CENTRAL 4536 // re-start scanning 4537 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4538 hci_stack->le_scanning_active = true; 4539 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4540 return true; 4541 } 4542 #endif 4543 4544 #ifdef ENABLE_LE_CENTRAL 4545 // re-start connecting 4546 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4547 bd_addr_t null_addr; 4548 memset(null_addr, 0, 6); 4549 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4550 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4551 hci_send_cmd(&hci_le_create_connection, 4552 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4553 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4554 1, // use whitelist 4555 0, // peer address type 4556 null_addr, // peer bd addr 4557 hci_stack->le_connection_own_addr_type, // our addr type: 4558 hci_stack->le_connection_interval_min, // conn interval min 4559 hci_stack->le_connection_interval_max, // conn interval max 4560 hci_stack->le_connection_latency, // conn latency 4561 hci_stack->le_supervision_timeout, // conn latency 4562 hci_stack->le_minimum_ce_length, // min ce length 4563 hci_stack->le_maximum_ce_length // max ce length 4564 ); 4565 return true; 4566 } 4567 #endif 4568 4569 #ifdef ENABLE_LE_PERIPHERAL 4570 // re-start advertising 4571 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4572 // check if advertisements should be enabled given 4573 hci_stack->le_advertisements_active = true; 4574 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4575 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4576 return true; 4577 } 4578 #endif 4579 4580 return false; 4581 } 4582 #endif 4583 4584 static bool hci_run_general_pending_commands(void){ 4585 btstack_linked_item_t * it; 4586 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4587 hci_connection_t * connection = (hci_connection_t *) it; 4588 4589 switch(connection->state){ 4590 case SEND_CREATE_CONNECTION: 4591 switch(connection->address_type){ 4592 #ifdef ENABLE_CLASSIC 4593 case BD_ADDR_TYPE_ACL: 4594 log_info("sending hci_create_connection"); 4595 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4596 break; 4597 #endif 4598 default: 4599 #ifdef ENABLE_BLE 4600 #ifdef ENABLE_LE_CENTRAL 4601 log_info("sending hci_le_create_connection"); 4602 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4603 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4604 hci_send_cmd(&hci_le_create_connection, 4605 hci_stack->le_connection_scan_interval, // conn scan interval 4606 hci_stack->le_connection_scan_window, // conn scan windows 4607 0, // don't use whitelist 4608 connection->address_type, // peer address type 4609 connection->address, // peer bd addr 4610 hci_stack->le_connection_own_addr_type, // our addr type: 4611 hci_stack->le_connection_interval_min, // conn interval min 4612 hci_stack->le_connection_interval_max, // conn interval max 4613 hci_stack->le_connection_latency, // conn latency 4614 hci_stack->le_supervision_timeout, // conn latency 4615 hci_stack->le_minimum_ce_length, // min ce length 4616 hci_stack->le_maximum_ce_length // max ce length 4617 ); 4618 connection->state = SENT_CREATE_CONNECTION; 4619 #endif 4620 #endif 4621 break; 4622 } 4623 return true; 4624 4625 #ifdef ENABLE_CLASSIC 4626 case RECEIVED_CONNECTION_REQUEST: 4627 connection->role = HCI_ROLE_SLAVE; 4628 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4629 log_info("sending hci_accept_connection_request"); 4630 connection->state = ACCEPTED_CONNECTION_REQUEST; 4631 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4632 } 4633 return true; 4634 #endif 4635 4636 #ifdef ENABLE_BLE 4637 #ifdef ENABLE_LE_CENTRAL 4638 case SEND_CANCEL_CONNECTION: 4639 connection->state = SENT_CANCEL_CONNECTION; 4640 hci_send_cmd(&hci_le_create_connection_cancel); 4641 return true; 4642 #endif 4643 #endif 4644 case SEND_DISCONNECT: 4645 connection->state = SENT_DISCONNECT; 4646 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4647 return true; 4648 4649 default: 4650 break; 4651 } 4652 4653 // no further commands if connection is about to get shut down 4654 if (connection->state == SENT_DISCONNECT) continue; 4655 4656 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4657 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4658 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4659 return true; 4660 } 4661 4662 #ifdef ENABLE_CLASSIC 4663 4664 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4665 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4666 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4667 return true; 4668 } 4669 4670 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4671 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4672 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4673 return true; 4674 } 4675 4676 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4677 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4678 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4679 return true; 4680 } 4681 4682 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4683 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4684 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4685 return true; 4686 } 4687 4688 // Handling link key request requires remote supported features 4689 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4690 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4692 4693 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4694 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4695 if (have_link_key && security_level_sufficient){ 4696 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4697 } else { 4698 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4699 } 4700 return true; 4701 } 4702 4703 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4704 log_info("denying to pin request"); 4705 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4706 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4707 return true; 4708 } 4709 4710 // security assessment requires remote features 4711 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4712 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4713 hci_ssp_assess_security_on_io_cap_request(connection); 4714 // 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 4715 } 4716 4717 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4718 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4719 // set authentication requirements: 4720 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4721 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4722 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4723 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4724 authreq |= 1; 4725 } 4726 bool bonding = hci_stack->bondable; 4727 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4728 // if we have received IO Cap Response, we're in responder role 4729 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4730 if (bonding && !remote_bonding){ 4731 log_info("Remote not bonding, dropping local flag"); 4732 bonding = false; 4733 } 4734 } 4735 if (bonding){ 4736 if (connection->bonding_flags & BONDING_DEDICATED){ 4737 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4738 } else { 4739 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4740 } 4741 } 4742 uint8_t have_oob_data = 0; 4743 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4744 if (connection->classic_oob_c_192 != NULL){ 4745 have_oob_data |= 1; 4746 } 4747 if (connection->classic_oob_c_256 != NULL){ 4748 have_oob_data |= 2; 4749 } 4750 #endif 4751 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4752 return true; 4753 } 4754 4755 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4756 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4757 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4758 return true; 4759 } 4760 4761 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4762 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4763 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4764 const uint8_t zero[16] = { 0 }; 4765 const uint8_t * r_192 = zero; 4766 const uint8_t * c_192 = zero; 4767 const uint8_t * r_256 = zero; 4768 const uint8_t * c_256 = zero; 4769 // verify P-256 OOB 4770 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4771 c_256 = connection->classic_oob_c_256; 4772 if (connection->classic_oob_r_256 != NULL) { 4773 r_256 = connection->classic_oob_r_256; 4774 } 4775 } 4776 // verify P-192 OOB 4777 if ((connection->classic_oob_c_192 != NULL)) { 4778 c_192 = connection->classic_oob_c_192; 4779 if (connection->classic_oob_r_192 != NULL) { 4780 r_192 = connection->classic_oob_r_192; 4781 } 4782 } 4783 4784 // assess security 4785 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4786 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4787 if (need_level_4 && !can_reach_level_4){ 4788 log_info("Level 4 required, but not possible -> abort"); 4789 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4790 // send oob negative reply 4791 c_256 = NULL; 4792 c_192 = NULL; 4793 } 4794 4795 // Reply 4796 if (c_256 != zero) { 4797 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4798 } else if (c_192 != zero){ 4799 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4800 } else { 4801 hci_stack->classic_oob_con_handle = connection->con_handle; 4802 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4803 } 4804 return true; 4805 } 4806 #endif 4807 4808 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4809 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4810 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4811 return true; 4812 } 4813 4814 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4815 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4816 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4817 return true; 4818 } 4819 4820 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4821 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4822 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4823 return true; 4824 } 4825 4826 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4827 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4828 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4829 connection->state = SENT_DISCONNECT; 4830 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4831 return true; 4832 } 4833 4834 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4835 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4836 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4837 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4838 return true; 4839 } 4840 4841 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4842 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4843 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4844 return true; 4845 } 4846 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4847 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4848 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4849 return true; 4850 } 4851 #endif 4852 4853 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4854 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4855 #ifdef ENABLE_CLASSIC 4856 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4857 #endif 4858 if (connection->state != SENT_DISCONNECT){ 4859 connection->state = SENT_DISCONNECT; 4860 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4861 return true; 4862 } 4863 } 4864 4865 #ifdef ENABLE_CLASSIC 4866 uint16_t sniff_min_interval; 4867 switch (connection->sniff_min_interval){ 4868 case 0: 4869 break; 4870 case 0xffff: 4871 connection->sniff_min_interval = 0; 4872 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4873 return true; 4874 default: 4875 sniff_min_interval = connection->sniff_min_interval; 4876 connection->sniff_min_interval = 0; 4877 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4878 return true; 4879 } 4880 4881 if (connection->sniff_subrating_max_latency != 0xffff){ 4882 uint16_t max_latency = connection->sniff_subrating_max_latency; 4883 connection->sniff_subrating_max_latency = 0; 4884 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4885 return true; 4886 } 4887 4888 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4889 uint8_t service_type = (uint8_t) connection->qos_service_type; 4890 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4891 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); 4892 return true; 4893 } 4894 4895 if (connection->request_role != HCI_ROLE_INVALID){ 4896 hci_role_t role = connection->request_role; 4897 connection->request_role = HCI_ROLE_INVALID; 4898 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4899 return true; 4900 } 4901 #endif 4902 4903 #ifdef ENABLE_BLE 4904 switch (connection->le_con_parameter_update_state){ 4905 // response to L2CAP CON PARAMETER UPDATE REQUEST 4906 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4907 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4908 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4909 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4910 0x0000, 0xffff); 4911 return true; 4912 case CON_PARAMETER_UPDATE_REPLY: 4913 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4914 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4915 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4916 0x0000, 0xffff); 4917 return true; 4918 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4919 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4920 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4921 return true; 4922 default: 4923 break; 4924 } 4925 if (connection->le_phy_update_all_phys != 0xffu){ 4926 uint8_t all_phys = connection->le_phy_update_all_phys; 4927 connection->le_phy_update_all_phys = 0xff; 4928 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); 4929 return true; 4930 } 4931 #endif 4932 } 4933 return false; 4934 } 4935 4936 static void hci_run(void){ 4937 4938 bool done; 4939 4940 // send continuation fragments first, as they block the prepared packet buffer 4941 done = hci_run_acl_fragments(); 4942 if (done) return; 4943 4944 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4945 // send host num completed packets next as they don't require num_cmd_packets > 0 4946 if (!hci_can_send_comand_packet_transport()) return; 4947 if (hci_stack->host_completed_packets){ 4948 hci_host_num_completed_packets(); 4949 return; 4950 } 4951 #endif 4952 4953 if (!hci_can_send_command_packet_now()) return; 4954 4955 // global/non-connection oriented commands 4956 4957 4958 #ifdef ENABLE_CLASSIC 4959 // general gap classic 4960 done = hci_run_general_gap_classic(); 4961 if (done) return; 4962 #endif 4963 4964 #ifdef ENABLE_BLE 4965 // general gap le 4966 done = hci_run_general_gap_le(); 4967 if (done) return; 4968 #endif 4969 4970 // send pending HCI commands 4971 done = hci_run_general_pending_commands(); 4972 if (done) return; 4973 4974 // stack state sub statemachines 4975 hci_connection_t * connection; 4976 switch (hci_stack->state){ 4977 case HCI_STATE_INITIALIZING: 4978 hci_initializing_run(); 4979 break; 4980 4981 case HCI_STATE_HALTING: 4982 4983 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4984 switch (hci_stack->substate){ 4985 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4986 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4987 4988 #ifdef ENABLE_BLE 4989 #ifdef ENABLE_LE_CENTRAL 4990 // free whitelist entries 4991 { 4992 btstack_linked_list_iterator_t lit; 4993 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4994 while (btstack_linked_list_iterator_has_next(&lit)){ 4995 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4996 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4997 btstack_memory_whitelist_entry_free(entry); 4998 } 4999 } 5000 #endif 5001 #endif 5002 // close all open connections 5003 connection = (hci_connection_t *) hci_stack->connections; 5004 if (connection){ 5005 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5006 if (!hci_can_send_command_packet_now()) return; 5007 5008 // check state 5009 if (connection->state == SENT_DISCONNECT) return; 5010 connection->state = SENT_DISCONNECT; 5011 5012 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5013 5014 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5015 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5016 5017 // ... which would be ignored anyway as we shutdown (free) the connection now 5018 hci_shutdown_connection(connection); 5019 5020 // finally, send the disconnect command 5021 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5022 return; 5023 } 5024 5025 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5026 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5027 log_info("HCI_STATE_HALTING: wait 50 ms"); 5028 hci_stack->substate = HCI_HALTING_W4_TIMER; 5029 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5030 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5031 btstack_run_loop_add_timer(&hci_stack->timeout); 5032 break; 5033 } 5034 5035 /* fall through */ 5036 5037 case HCI_HALTING_CLOSE: 5038 log_info("HCI_STATE_HALTING, calling off"); 5039 5040 // switch mode 5041 hci_power_control_off(); 5042 5043 log_info("HCI_STATE_HALTING, emitting state"); 5044 hci_emit_state(); 5045 log_info("HCI_STATE_HALTING, done"); 5046 break; 5047 5048 case HCI_HALTING_W4_TIMER: 5049 // keep waiting 5050 5051 break; 5052 default: 5053 break; 5054 } 5055 5056 break; 5057 5058 case HCI_STATE_FALLING_ASLEEP: 5059 switch(hci_stack->substate) { 5060 case HCI_FALLING_ASLEEP_DISCONNECT: 5061 log_info("HCI_STATE_FALLING_ASLEEP"); 5062 // close all open connections 5063 connection = (hci_connection_t *) hci_stack->connections; 5064 if (connection){ 5065 5066 // send disconnect 5067 if (!hci_can_send_command_packet_now()) return; 5068 5069 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5070 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5071 5072 // send disconnected event right away - causes higher layer connections to get closed, too. 5073 hci_shutdown_connection(connection); 5074 return; 5075 } 5076 5077 if (hci_classic_supported()){ 5078 // disable page and inquiry scan 5079 if (!hci_can_send_command_packet_now()) return; 5080 5081 log_info("HCI_STATE_HALTING, disabling inq scans"); 5082 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5083 5084 // continue in next sub state 5085 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5086 break; 5087 } 5088 5089 /* fall through */ 5090 5091 case HCI_FALLING_ASLEEP_COMPLETE: 5092 log_info("HCI_STATE_HALTING, calling sleep"); 5093 // switch mode 5094 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5095 hci_emit_state(); 5096 break; 5097 5098 default: 5099 break; 5100 } 5101 break; 5102 5103 default: 5104 break; 5105 } 5106 } 5107 5108 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5109 // house-keeping 5110 5111 #ifdef ENABLE_CLASSIC 5112 bd_addr_t addr; 5113 hci_connection_t * conn; 5114 #endif 5115 #ifdef ENABLE_LE_CENTRAL 5116 uint8_t initiator_filter_policy; 5117 #endif 5118 5119 uint16_t opcode = little_endian_read_16(packet, 0); 5120 switch (opcode) { 5121 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5122 hci_stack->loopback_mode = packet[3]; 5123 break; 5124 5125 #ifdef ENABLE_CLASSIC 5126 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5127 reverse_bd_addr(&packet[3], addr); 5128 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5129 5130 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5131 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5132 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5133 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5134 } 5135 5136 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5137 if (!conn) { 5138 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5139 if (!conn) { 5140 // notify client that alloc failed 5141 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5142 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5143 } 5144 conn->state = SEND_CREATE_CONNECTION; 5145 conn->role = HCI_ROLE_MASTER; 5146 } 5147 5148 conn->con_handle = HCI_CON_HANDLE_INVALID; 5149 conn->role = HCI_ROLE_INVALID; 5150 5151 log_info("conn state %u", conn->state); 5152 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5153 switch (conn->state) { 5154 // if connection active exists 5155 case OPEN: 5156 // and OPEN, emit connection complete command 5157 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5158 // packet not sent to controller 5159 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5160 case RECEIVED_DISCONNECTION_COMPLETE: 5161 // create connection triggered in disconnect complete event, let's do it now 5162 break; 5163 case SEND_CREATE_CONNECTION: 5164 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5165 break; 5166 default: 5167 // otherwise, just ignore as it is already in the open process 5168 // packet not sent to controller 5169 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5170 } 5171 conn->state = SENT_CREATE_CONNECTION; 5172 5173 // track outgoing connection 5174 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5175 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5176 break; 5177 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5178 if (hci_stack->link_key_db) { 5179 reverse_bd_addr(&packet[3], addr); 5180 hci_stack->link_key_db->delete_link_key(addr); 5181 } 5182 break; 5183 5184 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5185 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5186 // setup_synchronous_connection? Voice setting at offset 22 5187 // TODO: compare to current setting if sco connection already active 5188 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5189 break; 5190 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5191 // accept_synchronus_connection? Voice setting at offset 18 5192 // TODO: compare to current setting if sco connection already active 5193 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5194 break; 5195 #endif 5196 #endif 5197 5198 #ifdef ENABLE_BLE 5199 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5200 hci_stack->le_random_address_set = 1; 5201 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5202 break; 5203 #ifdef ENABLE_LE_PERIPHERAL 5204 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5205 hci_stack->le_advertisements_active = packet[3] != 0; 5206 break; 5207 #endif 5208 #ifdef ENABLE_LE_CENTRAL 5209 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5210 // white list used? 5211 initiator_filter_policy = packet[7]; 5212 switch (initiator_filter_policy) { 5213 case 0: 5214 // whitelist not used 5215 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5216 break; 5217 case 1: 5218 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5219 break; 5220 default: 5221 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5222 break; 5223 } 5224 // track outgoing connection 5225 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5226 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5227 break; 5228 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5229 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5230 break; 5231 #endif 5232 #endif 5233 default: 5234 break; 5235 } 5236 5237 hci_stack->num_cmd_packets--; 5238 5239 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5240 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5241 if (err != 0){ 5242 return ERROR_CODE_HARDWARE_FAILURE; 5243 } 5244 return ERROR_CODE_SUCCESS; 5245 } 5246 5247 // disconnect because of security block 5248 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5249 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5250 if (!connection) return; 5251 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5252 } 5253 5254 5255 // Configure Secure Simple Pairing 5256 5257 #ifdef ENABLE_CLASSIC 5258 5259 // enable will enable SSP during init 5260 void gap_ssp_set_enable(int enable){ 5261 hci_stack->ssp_enable = enable; 5262 } 5263 5264 static int hci_local_ssp_activated(void){ 5265 return gap_ssp_supported() && hci_stack->ssp_enable; 5266 } 5267 5268 // if set, BTstack will respond to io capability request using authentication requirement 5269 void gap_ssp_set_io_capability(int io_capability){ 5270 hci_stack->ssp_io_capability = io_capability; 5271 } 5272 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5273 hci_stack->ssp_authentication_requirement = authentication_requirement; 5274 } 5275 5276 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5277 void gap_ssp_set_auto_accept(int auto_accept){ 5278 hci_stack->ssp_auto_accept = auto_accept; 5279 } 5280 5281 void gap_secure_connections_enable(bool enable){ 5282 hci_stack->secure_connections_enable = enable; 5283 } 5284 5285 #endif 5286 5287 // va_list part of hci_send_cmd 5288 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5289 if (!hci_can_send_command_packet_now()){ 5290 log_error("hci_send_cmd called but cannot send packet now"); 5291 return ERROR_CODE_COMMAND_DISALLOWED; 5292 } 5293 5294 // for HCI INITIALIZATION 5295 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5296 hci_stack->last_cmd_opcode = cmd->opcode; 5297 5298 hci_reserve_packet_buffer(); 5299 uint8_t * packet = hci_stack->hci_packet_buffer; 5300 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5301 uint8_t status = hci_send_cmd_packet(packet, size); 5302 5303 // release packet buffer on error or for synchronous transport implementations 5304 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5305 hci_release_packet_buffer(); 5306 hci_emit_transport_packet_sent(); 5307 } 5308 5309 return status; 5310 } 5311 5312 /** 5313 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5314 */ 5315 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5316 va_list argptr; 5317 va_start(argptr, cmd); 5318 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5319 va_end(argptr); 5320 return status; 5321 } 5322 5323 // Create various non-HCI events. 5324 // TODO: generalize, use table similar to hci_create_command 5325 5326 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5327 // dump packet 5328 if (dump) { 5329 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5330 } 5331 5332 // dispatch to all event handlers 5333 btstack_linked_list_iterator_t it; 5334 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5335 while (btstack_linked_list_iterator_has_next(&it)){ 5336 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5337 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5338 } 5339 } 5340 5341 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5342 if (!hci_stack->acl_packet_handler) return; 5343 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5344 } 5345 5346 #ifdef ENABLE_CLASSIC 5347 static void hci_notify_if_sco_can_send_now(void){ 5348 // notify SCO sender if waiting 5349 if (!hci_stack->sco_waiting_for_can_send_now) return; 5350 if (hci_can_send_sco_packet_now()){ 5351 hci_stack->sco_waiting_for_can_send_now = 0; 5352 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5353 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5354 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5355 } 5356 } 5357 5358 // parsing end emitting has been merged to reduce code size 5359 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5360 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5361 5362 uint8_t * eir_data; 5363 ad_context_t context; 5364 const uint8_t * name; 5365 uint8_t name_len; 5366 5367 if (size < 3) return; 5368 5369 int event_type = hci_event_packet_get_type(packet); 5370 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5371 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5372 5373 switch (event_type){ 5374 case HCI_EVENT_INQUIRY_RESULT: 5375 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5376 if (size != (3 + (num_responses * 14))) return; 5377 break; 5378 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5379 if (size != 257) return; 5380 if (num_responses != 1) return; 5381 break; 5382 default: 5383 return; 5384 } 5385 5386 // event[1] is set at the end 5387 int i; 5388 for (i=0; i<num_responses;i++){ 5389 memset(event, 0, sizeof(event)); 5390 event[0] = GAP_EVENT_INQUIRY_RESULT; 5391 uint8_t event_size = 27; // if name is not set by EIR 5392 5393 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5394 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5395 (void)memcpy(&event[9], 5396 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5397 3); // class of device 5398 (void)memcpy(&event[12], 5399 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5400 2); // clock offset 5401 5402 switch (event_type){ 5403 case HCI_EVENT_INQUIRY_RESULT: 5404 // 14,15,16,17 = 0, size 18 5405 break; 5406 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5407 event[14] = 1; 5408 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5409 // 16,17 = 0, size 18 5410 break; 5411 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5412 event[14] = 1; 5413 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5414 // EIR packets only contain a single inquiry response 5415 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5416 name = NULL; 5417 // Iterate over EIR data 5418 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5419 uint8_t data_type = ad_iterator_get_data_type(&context); 5420 uint8_t data_size = ad_iterator_get_data_len(&context); 5421 const uint8_t * data = ad_iterator_get_data(&context); 5422 // Prefer Complete Local Name over Shortened Local Name 5423 switch (data_type){ 5424 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5425 if (name) continue; 5426 /* fall through */ 5427 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5428 name = data; 5429 name_len = data_size; 5430 break; 5431 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5432 if (data_size != 8) break; 5433 event[16] = 1; 5434 memcpy(&event[17], data, 8); 5435 break; 5436 default: 5437 break; 5438 } 5439 } 5440 if (name){ 5441 event[25] = 1; 5442 // truncate name if needed 5443 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5444 event[26] = len; 5445 (void)memcpy(&event[27], name, len); 5446 event_size += len; 5447 } 5448 break; 5449 default: 5450 return; 5451 } 5452 event[1] = event_size - 2; 5453 hci_emit_event(event, event_size, 1); 5454 } 5455 } 5456 #endif 5457 5458 void hci_emit_state(void){ 5459 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5460 uint8_t event[3]; 5461 event[0] = BTSTACK_EVENT_STATE; 5462 event[1] = sizeof(event) - 2u; 5463 event[2] = hci_stack->state; 5464 hci_emit_event(event, sizeof(event), 1); 5465 } 5466 5467 #ifdef ENABLE_CLASSIC 5468 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5469 uint8_t event[13]; 5470 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5471 event[1] = sizeof(event) - 2; 5472 event[2] = status; 5473 little_endian_store_16(event, 3, con_handle); 5474 reverse_bd_addr(address, &event[5]); 5475 event[11] = 1; // ACL connection 5476 event[12] = 0; // encryption disabled 5477 hci_emit_event(event, sizeof(event), 1); 5478 } 5479 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5480 if (disable_l2cap_timeouts) return; 5481 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5482 uint8_t event[4]; 5483 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5484 event[1] = sizeof(event) - 2; 5485 little_endian_store_16(event, 2, conn->con_handle); 5486 hci_emit_event(event, sizeof(event), 1); 5487 } 5488 #endif 5489 5490 #ifdef ENABLE_BLE 5491 #ifdef ENABLE_LE_CENTRAL 5492 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){ 5493 uint8_t event[21]; 5494 event[0] = HCI_EVENT_LE_META; 5495 event[1] = sizeof(event) - 2u; 5496 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5497 event[3] = status; 5498 little_endian_store_16(event, 4, con_handle); 5499 event[6] = 0; // TODO: role 5500 event[7] = address_type; 5501 reverse_bd_addr(address, &event[8]); 5502 little_endian_store_16(event, 14, 0); // interval 5503 little_endian_store_16(event, 16, 0); // latency 5504 little_endian_store_16(event, 18, 0); // supervision timeout 5505 event[20] = 0; // master clock accuracy 5506 hci_emit_event(event, sizeof(event), 1); 5507 } 5508 #endif 5509 #endif 5510 5511 static void hci_emit_transport_packet_sent(void){ 5512 // notify upper stack that it might be possible to send again 5513 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5514 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5515 } 5516 5517 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5518 uint8_t event[6]; 5519 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5520 event[1] = sizeof(event) - 2u; 5521 event[2] = 0; // status = OK 5522 little_endian_store_16(event, 3, con_handle); 5523 event[5] = reason; 5524 hci_emit_event(event, sizeof(event), 1); 5525 } 5526 5527 static void hci_emit_nr_connections_changed(void){ 5528 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5529 uint8_t event[3]; 5530 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5531 event[1] = sizeof(event) - 2u; 5532 event[2] = nr_hci_connections(); 5533 hci_emit_event(event, sizeof(event), 1); 5534 } 5535 5536 static void hci_emit_hci_open_failed(void){ 5537 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5538 uint8_t event[2]; 5539 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5540 event[1] = sizeof(event) - 2u; 5541 hci_emit_event(event, sizeof(event), 1); 5542 } 5543 5544 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5545 log_info("hci_emit_dedicated_bonding_result %u ", status); 5546 uint8_t event[9]; 5547 int pos = 0; 5548 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5549 event[pos++] = sizeof(event) - 2u; 5550 event[pos++] = status; 5551 reverse_bd_addr(address, &event[pos]); 5552 hci_emit_event(event, sizeof(event), 1); 5553 } 5554 5555 5556 #ifdef ENABLE_CLASSIC 5557 5558 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5559 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5560 uint8_t event[5]; 5561 int pos = 0; 5562 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5563 event[pos++] = sizeof(event) - 2; 5564 little_endian_store_16(event, 2, con_handle); 5565 pos += 2; 5566 event[pos++] = level; 5567 hci_emit_event(event, sizeof(event), 1); 5568 } 5569 5570 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5571 if (!connection) return LEVEL_0; 5572 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5573 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5574 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5575 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5576 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5577 // LEVEL 4 always requires 128 bit encrytion key size 5578 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5579 security_level = LEVEL_3; 5580 } 5581 return security_level; 5582 } 5583 5584 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5585 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5586 uint8_t event[3]; 5587 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5588 event[1] = sizeof(event) - 2; 5589 event[2] = enabled; 5590 hci_emit_event(event, sizeof(event), 1); 5591 } 5592 5593 // query if remote side supports eSCO 5594 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5595 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5596 if (!connection) return false; 5597 return (connection->remote_supported_features[0] & 1) != 0; 5598 } 5599 5600 static bool hci_ssp_supported(hci_connection_t * connection){ 5601 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5602 return (connection->bonding_flags & mask) == mask; 5603 } 5604 5605 // query if remote side supports SSP 5606 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5607 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5608 if (!connection) return false; 5609 return hci_ssp_supported(connection) ? 1 : 0; 5610 } 5611 5612 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5613 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5614 } 5615 5616 // GAP API 5617 /** 5618 * @bbrief enable/disable bonding. default is enabled 5619 * @praram enabled 5620 */ 5621 void gap_set_bondable_mode(int enable){ 5622 hci_stack->bondable = enable ? 1 : 0; 5623 } 5624 /** 5625 * @brief Get bondable mode. 5626 * @return 1 if bondable 5627 */ 5628 int gap_get_bondable_mode(void){ 5629 return hci_stack->bondable; 5630 } 5631 5632 /** 5633 * @brief map link keys to security levels 5634 */ 5635 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5636 switch (link_key_type){ 5637 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5638 return LEVEL_4; 5639 case COMBINATION_KEY: 5640 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5641 return LEVEL_3; 5642 default: 5643 return LEVEL_2; 5644 } 5645 } 5646 5647 /** 5648 * @brief map link keys to secure connection yes/no 5649 */ 5650 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5651 switch (link_key_type){ 5652 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5653 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5654 return 1; 5655 default: 5656 return 0; 5657 } 5658 } 5659 5660 /** 5661 * @brief map link keys to authenticated 5662 */ 5663 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5664 switch (link_key_type){ 5665 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5666 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5667 return 1; 5668 default: 5669 return 0; 5670 } 5671 } 5672 5673 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5674 log_info("gap_mitm_protection_required_for_security_level %u", level); 5675 return level > LEVEL_2; 5676 } 5677 5678 /** 5679 * @brief get current security level 5680 */ 5681 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5682 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5683 if (!connection) return LEVEL_0; 5684 return gap_security_level_for_connection(connection); 5685 } 5686 5687 /** 5688 * @brief request connection to device to 5689 * @result GAP_AUTHENTICATION_RESULT 5690 */ 5691 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5692 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5693 if (!connection){ 5694 hci_emit_security_level(con_handle, LEVEL_0); 5695 return; 5696 } 5697 5698 btstack_assert(hci_is_le_connection(connection) == false); 5699 5700 // 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) 5701 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5702 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5703 requested_level = LEVEL_4; 5704 } 5705 5706 gap_security_level_t current_level = gap_security_level(con_handle); 5707 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5708 requested_level, connection->requested_security_level, current_level); 5709 5710 // authentication active if authentication request was sent or planned level > 0 5711 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5712 if (authentication_active){ 5713 // authentication already active 5714 if (connection->requested_security_level < requested_level){ 5715 // increase requested level as new level is higher 5716 // TODO: handle re-authentication when done 5717 connection->requested_security_level = requested_level; 5718 } 5719 } else { 5720 // no request active, notify if security sufficient 5721 if (requested_level <= current_level){ 5722 hci_emit_security_level(con_handle, current_level); 5723 return; 5724 } 5725 5726 // store request 5727 connection->requested_security_level = requested_level; 5728 5729 // start to authenticate connection 5730 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5731 hci_run(); 5732 } 5733 } 5734 5735 /** 5736 * @brief start dedicated bonding with device. disconnect after bonding 5737 * @param device 5738 * @param request MITM protection 5739 * @result GAP_DEDICATED_BONDING_COMPLETE 5740 */ 5741 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5742 5743 // create connection state machine 5744 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5745 5746 if (!connection){ 5747 return BTSTACK_MEMORY_ALLOC_FAILED; 5748 } 5749 5750 // delete linkn key 5751 gap_drop_link_key_for_bd_addr(device); 5752 5753 // configure LEVEL_2/3, dedicated bonding 5754 connection->state = SEND_CREATE_CONNECTION; 5755 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5756 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5757 connection->bonding_flags = BONDING_DEDICATED; 5758 5759 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5760 5761 // handle: connnection failure (connection complete != ok) 5762 // handle: authentication failure 5763 // handle: disconnect on done 5764 5765 hci_run(); 5766 5767 return 0; 5768 } 5769 5770 void gap_set_local_name(const char * local_name){ 5771 hci_stack->local_name = local_name; 5772 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5773 // also update EIR if not set by user 5774 if (hci_stack->eir_data == NULL){ 5775 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5776 } 5777 hci_run(); 5778 } 5779 #endif 5780 5781 5782 #ifdef ENABLE_BLE 5783 5784 #ifdef ENABLE_LE_CENTRAL 5785 void gap_start_scan(void){ 5786 hci_stack->le_scanning_enabled = true; 5787 hci_run(); 5788 } 5789 5790 void gap_stop_scan(void){ 5791 hci_stack->le_scanning_enabled = false; 5792 hci_run(); 5793 } 5794 5795 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5796 hci_stack->le_scan_type = scan_type; 5797 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5798 hci_stack->le_scan_interval = scan_interval; 5799 hci_stack->le_scan_window = scan_window; 5800 hci_stack->le_scanning_param_update = true; 5801 hci_run(); 5802 } 5803 5804 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5805 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5806 } 5807 5808 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5809 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5810 if (!conn){ 5811 // disallow if le connection is already outgoing 5812 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5813 log_error("le connection already active"); 5814 return ERROR_CODE_COMMAND_DISALLOWED; 5815 } 5816 5817 log_info("gap_connect: no connection exists yet, creating context"); 5818 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5819 if (!conn){ 5820 // notify client that alloc failed 5821 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5822 log_info("gap_connect: failed to alloc hci_connection_t"); 5823 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5824 } 5825 5826 // set le connecting state 5827 if (hci_is_le_connection_type(addr_type)){ 5828 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5829 } 5830 5831 conn->state = SEND_CREATE_CONNECTION; 5832 log_info("gap_connect: send create connection next"); 5833 hci_run(); 5834 return ERROR_CODE_SUCCESS; 5835 } 5836 5837 if (!hci_is_le_connection(conn) || 5838 (conn->state == SEND_CREATE_CONNECTION) || 5839 (conn->state == SENT_CREATE_CONNECTION)) { 5840 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5841 log_error("gap_connect: classic connection or connect is already being created"); 5842 return GATT_CLIENT_IN_WRONG_STATE; 5843 } 5844 5845 // check if connection was just disconnected 5846 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5847 log_info("gap_connect: send create connection (again)"); 5848 conn->state = SEND_CREATE_CONNECTION; 5849 hci_run(); 5850 return ERROR_CODE_SUCCESS; 5851 } 5852 5853 log_info("gap_connect: context exists with state %u", conn->state); 5854 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5855 hci_run(); 5856 return ERROR_CODE_SUCCESS; 5857 } 5858 5859 // @assumption: only a single outgoing LE Connection exists 5860 static hci_connection_t * gap_get_outgoing_connection(void){ 5861 btstack_linked_item_t *it; 5862 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5863 hci_connection_t * conn = (hci_connection_t *) it; 5864 if (!hci_is_le_connection(conn)) continue; 5865 switch (conn->state){ 5866 case SEND_CREATE_CONNECTION: 5867 case SENT_CREATE_CONNECTION: 5868 case SENT_CANCEL_CONNECTION: 5869 return conn; 5870 default: 5871 break; 5872 }; 5873 } 5874 return NULL; 5875 } 5876 5877 uint8_t gap_connect_cancel(void){ 5878 hci_connection_t * conn = gap_get_outgoing_connection(); 5879 if (!conn) return 0; 5880 switch (conn->state){ 5881 case SEND_CREATE_CONNECTION: 5882 // skip sending create connection and emit event instead 5883 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5884 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5885 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5886 btstack_memory_hci_connection_free( conn ); 5887 break; 5888 case SENT_CREATE_CONNECTION: 5889 // request to send cancel connection 5890 conn->state = SEND_CANCEL_CONNECTION; 5891 hci_run(); 5892 break; 5893 default: 5894 break; 5895 } 5896 return 0; 5897 } 5898 #endif 5899 5900 #ifdef ENABLE_LE_CENTRAL 5901 /** 5902 * @brief Set connection parameters for outgoing connections 5903 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5904 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5905 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5906 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5907 * @param conn_latency, default: 4 5908 * @param supervision_timeout (unit: 10ms), default: 720 ms 5909 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5910 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5911 */ 5912 5913 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5914 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5915 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5916 hci_stack->le_connection_scan_interval = conn_scan_interval; 5917 hci_stack->le_connection_scan_window = conn_scan_window; 5918 hci_stack->le_connection_interval_min = conn_interval_min; 5919 hci_stack->le_connection_interval_max = conn_interval_max; 5920 hci_stack->le_connection_latency = conn_latency; 5921 hci_stack->le_supervision_timeout = supervision_timeout; 5922 hci_stack->le_minimum_ce_length = min_ce_length; 5923 hci_stack->le_maximum_ce_length = max_ce_length; 5924 } 5925 #endif 5926 5927 /** 5928 * @brief Updates the connection parameters for a given LE connection 5929 * @param handle 5930 * @param conn_interval_min (unit: 1.25ms) 5931 * @param conn_interval_max (unit: 1.25ms) 5932 * @param conn_latency 5933 * @param supervision_timeout (unit: 10ms) 5934 * @returns 0 if ok 5935 */ 5936 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5937 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5938 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5939 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5940 connection->le_conn_interval_min = conn_interval_min; 5941 connection->le_conn_interval_max = conn_interval_max; 5942 connection->le_conn_latency = conn_latency; 5943 connection->le_supervision_timeout = supervision_timeout; 5944 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5945 hci_run(); 5946 return 0; 5947 } 5948 5949 /** 5950 * @brief Request an update of the connection parameter for a given LE connection 5951 * @param handle 5952 * @param conn_interval_min (unit: 1.25ms) 5953 * @param conn_interval_max (unit: 1.25ms) 5954 * @param conn_latency 5955 * @param supervision_timeout (unit: 10ms) 5956 * @returns 0 if ok 5957 */ 5958 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5959 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5960 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5961 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5962 connection->le_conn_interval_min = conn_interval_min; 5963 connection->le_conn_interval_max = conn_interval_max; 5964 connection->le_conn_latency = conn_latency; 5965 connection->le_supervision_timeout = supervision_timeout; 5966 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5967 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5968 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5969 return 0; 5970 } 5971 5972 #ifdef ENABLE_LE_PERIPHERAL 5973 5974 /** 5975 * @brief Set Advertisement Data 5976 * @param advertising_data_length 5977 * @param advertising_data (max 31 octets) 5978 * @note data is not copied, pointer has to stay valid 5979 */ 5980 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5981 hci_stack->le_advertisements_data_len = advertising_data_length; 5982 hci_stack->le_advertisements_data = advertising_data; 5983 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5984 hci_run(); 5985 } 5986 5987 /** 5988 * @brief Set Scan Response Data 5989 * @param advertising_data_length 5990 * @param advertising_data (max 31 octets) 5991 * @note data is not copied, pointer has to stay valid 5992 */ 5993 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5994 hci_stack->le_scan_response_data_len = scan_response_data_length; 5995 hci_stack->le_scan_response_data = scan_response_data; 5996 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5997 hci_run(); 5998 } 5999 6000 /** 6001 * @brief Set Advertisement Parameters 6002 * @param adv_int_min 6003 * @param adv_int_max 6004 * @param adv_type 6005 * @param direct_address_type 6006 * @param direct_address 6007 * @param channel_map 6008 * @param filter_policy 6009 * 6010 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6011 */ 6012 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6013 uint8_t direct_address_typ, bd_addr_t direct_address, 6014 uint8_t channel_map, uint8_t filter_policy) { 6015 6016 hci_stack->le_advertisements_interval_min = adv_int_min; 6017 hci_stack->le_advertisements_interval_max = adv_int_max; 6018 hci_stack->le_advertisements_type = adv_type; 6019 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6020 hci_stack->le_advertisements_channel_map = channel_map; 6021 hci_stack->le_advertisements_filter_policy = filter_policy; 6022 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6023 6); 6024 6025 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6026 hci_run(); 6027 } 6028 6029 /** 6030 * @brief Enable/Disable Advertisements 6031 * @param enabled 6032 */ 6033 void gap_advertisements_enable(int enabled){ 6034 hci_stack->le_advertisements_enabled = enabled != 0; 6035 hci_update_advertisements_enabled_for_current_roles(); 6036 hci_run(); 6037 } 6038 6039 #endif 6040 6041 void hci_le_set_own_address_type(uint8_t own_address_type){ 6042 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6043 if (own_address_type == hci_stack->le_own_addr_type) return; 6044 hci_stack->le_own_addr_type = own_address_type; 6045 6046 #ifdef ENABLE_LE_PERIPHERAL 6047 // update advertisement parameters, too 6048 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6049 hci_run(); 6050 #endif 6051 #ifdef ENABLE_LE_CENTRAL 6052 // note: we don't update scan parameters or modify ongoing connection attempts 6053 #endif 6054 } 6055 6056 #endif 6057 6058 uint8_t gap_disconnect(hci_con_handle_t handle){ 6059 hci_connection_t * conn = hci_connection_for_handle(handle); 6060 if (!conn){ 6061 hci_emit_disconnection_complete(handle, 0); 6062 return 0; 6063 } 6064 // ignore if already disconnected 6065 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6066 return 0; 6067 } 6068 conn->state = SEND_DISCONNECT; 6069 hci_run(); 6070 return 0; 6071 } 6072 6073 int gap_read_rssi(hci_con_handle_t con_handle){ 6074 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6075 if (hci_connection == NULL) return 0; 6076 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6077 hci_run(); 6078 return 1; 6079 } 6080 6081 /** 6082 * @brief Get connection type 6083 * @param con_handle 6084 * @result connection_type 6085 */ 6086 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6087 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6088 if (!conn) return GAP_CONNECTION_INVALID; 6089 switch (conn->address_type){ 6090 case BD_ADDR_TYPE_LE_PUBLIC: 6091 case BD_ADDR_TYPE_LE_RANDOM: 6092 return GAP_CONNECTION_LE; 6093 case BD_ADDR_TYPE_SCO: 6094 return GAP_CONNECTION_SCO; 6095 case BD_ADDR_TYPE_ACL: 6096 return GAP_CONNECTION_ACL; 6097 default: 6098 return GAP_CONNECTION_INVALID; 6099 } 6100 } 6101 6102 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6103 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6104 if (!conn) return HCI_ROLE_INVALID; 6105 return (hci_role_t) conn->role; 6106 } 6107 6108 6109 #ifdef ENABLE_CLASSIC 6110 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6111 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6112 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6113 conn->request_role = role; 6114 hci_run(); 6115 return ERROR_CODE_SUCCESS; 6116 } 6117 #endif 6118 6119 #ifdef ENABLE_BLE 6120 6121 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){ 6122 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6123 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6124 6125 conn->le_phy_update_all_phys = all_phys; 6126 conn->le_phy_update_tx_phys = tx_phys; 6127 conn->le_phy_update_rx_phys = rx_phys; 6128 conn->le_phy_update_phy_options = phy_options; 6129 6130 hci_run(); 6131 6132 return 0; 6133 } 6134 6135 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6136 // check if already in list 6137 btstack_linked_list_iterator_t it; 6138 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6139 while (btstack_linked_list_iterator_has_next(&it)) { 6140 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6141 if (entry->address_type != address_type) { 6142 continue; 6143 } 6144 if (memcmp(entry->address, address, 6) != 0) { 6145 continue; 6146 } 6147 // disallow if already scheduled to add 6148 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6149 return ERROR_CODE_COMMAND_DISALLOWED; 6150 } 6151 // still on controller, but scheduled to remove -> re-add 6152 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6153 return ERROR_CODE_SUCCESS; 6154 } 6155 // alloc and add to list 6156 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6157 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6158 entry->address_type = address_type; 6159 (void)memcpy(entry->address, address, 6); 6160 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6161 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6162 return ERROR_CODE_SUCCESS; 6163 } 6164 6165 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6166 btstack_linked_list_iterator_t it; 6167 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6168 while (btstack_linked_list_iterator_has_next(&it)){ 6169 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6170 if (entry->address_type != address_type) { 6171 continue; 6172 } 6173 if (memcmp(entry->address, address, 6) != 0) { 6174 continue; 6175 } 6176 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6177 // remove from controller if already present 6178 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6179 } else { 6180 // directly remove entry from whitelist 6181 btstack_linked_list_iterator_remove(&it); 6182 btstack_memory_whitelist_entry_free(entry); 6183 } 6184 return ERROR_CODE_SUCCESS; 6185 } 6186 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6187 } 6188 6189 static void hci_whitelist_clear(void){ 6190 btstack_linked_list_iterator_t it; 6191 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6192 while (btstack_linked_list_iterator_has_next(&it)){ 6193 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6194 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6195 // remove from controller if already present 6196 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6197 continue; 6198 } 6199 // directly remove entry from whitelist 6200 btstack_linked_list_iterator_remove(&it); 6201 btstack_memory_whitelist_entry_free(entry); 6202 } 6203 } 6204 6205 /** 6206 * @brief Clear Whitelist 6207 * @returns 0 if ok 6208 */ 6209 uint8_t gap_whitelist_clear(void){ 6210 hci_whitelist_clear(); 6211 hci_run(); 6212 return ERROR_CODE_SUCCESS; 6213 } 6214 6215 /** 6216 * @brief Add Device to Whitelist 6217 * @param address_typ 6218 * @param address 6219 * @returns 0 if ok 6220 */ 6221 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6222 uint8_t status = hci_whitelist_add(address_type, address); 6223 if (status){ 6224 return status; 6225 } 6226 hci_run(); 6227 return ERROR_CODE_SUCCESS; 6228 } 6229 6230 /** 6231 * @brief Remove Device from Whitelist 6232 * @param address_typ 6233 * @param address 6234 * @returns 0 if ok 6235 */ 6236 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6237 uint8_t status = hci_whitelist_remove(address_type, address); 6238 if (status){ 6239 return status; 6240 } 6241 hci_run(); 6242 return ERROR_CODE_SUCCESS; 6243 } 6244 6245 #ifdef ENABLE_LE_CENTRAL 6246 /** 6247 * @brief Connect with Whitelist 6248 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6249 * @returns - if ok 6250 */ 6251 uint8_t gap_connect_with_whitelist(void){ 6252 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6253 return ERROR_CODE_COMMAND_DISALLOWED; 6254 } 6255 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6256 hci_run(); 6257 return ERROR_CODE_SUCCESS; 6258 } 6259 6260 /** 6261 * @brief Auto Connection Establishment - Start Connecting to device 6262 * @param address_typ 6263 * @param address 6264 * @returns 0 if ok 6265 */ 6266 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6267 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6268 return ERROR_CODE_COMMAND_DISALLOWED; 6269 } 6270 6271 uint8_t status = hci_whitelist_add(address_type, address); 6272 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6273 return status; 6274 } 6275 6276 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6277 6278 hci_run(); 6279 return ERROR_CODE_SUCCESS; 6280 } 6281 6282 /** 6283 * @brief Auto Connection Establishment - Stop Connecting to device 6284 * @param address_typ 6285 * @param address 6286 * @returns 0 if ok 6287 */ 6288 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6289 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6290 return ERROR_CODE_COMMAND_DISALLOWED; 6291 } 6292 6293 hci_whitelist_remove(address_type, address); 6294 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6295 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6296 } 6297 hci_run(); 6298 return 0; 6299 } 6300 6301 /** 6302 * @brief Auto Connection Establishment - Stop everything 6303 * @note Convenience function to stop all active auto connection attempts 6304 */ 6305 uint8_t gap_auto_connection_stop_all(void){ 6306 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6307 return ERROR_CODE_COMMAND_DISALLOWED; 6308 } 6309 hci_whitelist_clear(); 6310 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6311 hci_run(); 6312 return ERROR_CODE_SUCCESS; 6313 } 6314 6315 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6316 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6317 if (!conn) return 0; 6318 return conn->le_connection_interval; 6319 } 6320 #endif 6321 #endif 6322 6323 #ifdef ENABLE_CLASSIC 6324 /** 6325 * @brief Set Extended Inquiry Response data 6326 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6327 * @note has to be done before stack starts up 6328 */ 6329 void gap_set_extended_inquiry_response(const uint8_t * data){ 6330 hci_stack->eir_data = data; 6331 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6332 hci_run(); 6333 } 6334 6335 /** 6336 * @brief Start GAP Classic Inquiry 6337 * @param duration in 1.28s units 6338 * @return 0 if ok 6339 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6340 */ 6341 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6342 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6343 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6344 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6345 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6346 } 6347 hci_stack->inquiry_state = duration_in_1280ms_units; 6348 hci_run(); 6349 return 0; 6350 } 6351 6352 /** 6353 * @brief Stop GAP Classic Inquiry 6354 * @returns 0 if ok 6355 */ 6356 int gap_inquiry_stop(void){ 6357 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6358 // emit inquiry complete event, before it even started 6359 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6360 hci_emit_event(event, sizeof(event), 1); 6361 return 0; 6362 } 6363 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6364 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6365 hci_run(); 6366 return 0; 6367 } 6368 6369 void gap_inquiry_set_lap(uint32_t lap){ 6370 hci_stack->inquiry_lap = lap; 6371 } 6372 6373 6374 /** 6375 * @brief Remote Name Request 6376 * @param addr 6377 * @param page_scan_repetition_mode 6378 * @param clock_offset only used when bit 15 is set 6379 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6380 */ 6381 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6382 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6383 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6384 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6385 hci_stack->remote_name_clock_offset = clock_offset; 6386 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6387 hci_run(); 6388 return 0; 6389 } 6390 6391 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6392 hci_stack->gap_pairing_state = state; 6393 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6394 hci_run(); 6395 return 0; 6396 } 6397 6398 /** 6399 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6400 * @param addr 6401 * @param pin_data 6402 * @param pin_len 6403 * @return 0 if ok 6404 */ 6405 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6406 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6407 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6408 hci_stack->gap_pairing_pin_len = pin_len; 6409 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6410 } 6411 6412 /** 6413 * @brief Legacy Pairing Pin Code Response 6414 * @param addr 6415 * @param pin 6416 * @return 0 if ok 6417 */ 6418 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6419 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6420 } 6421 6422 /** 6423 * @brief Abort Legacy Pairing 6424 * @param addr 6425 * @param pin 6426 * @return 0 if ok 6427 */ 6428 int gap_pin_code_negative(bd_addr_t addr){ 6429 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6430 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6431 } 6432 6433 /** 6434 * @brief SSP Passkey Response 6435 * @param addr 6436 * @param passkey 6437 * @return 0 if ok 6438 */ 6439 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6440 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6441 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6442 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6443 } 6444 6445 /** 6446 * @brief Abort SSP Passkey Entry/Pairing 6447 * @param addr 6448 * @param pin 6449 * @return 0 if ok 6450 */ 6451 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6452 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6453 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6454 } 6455 6456 /** 6457 * @brief Accept SSP Numeric Comparison 6458 * @param addr 6459 * @param passkey 6460 * @return 0 if ok 6461 */ 6462 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6463 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6464 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6465 } 6466 6467 /** 6468 * @brief Abort SSP Numeric Comparison/Pairing 6469 * @param addr 6470 * @param pin 6471 * @return 0 if ok 6472 */ 6473 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6474 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6475 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6476 } 6477 6478 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6479 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6480 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6481 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6482 connectionSetAuthenticationFlags(conn, flag); 6483 hci_run(); 6484 return ERROR_CODE_SUCCESS; 6485 } 6486 #endif 6487 6488 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6489 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6490 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6491 } 6492 6493 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6494 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6495 } 6496 #endif 6497 6498 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6499 /** 6500 * @brief Report Remote OOB Data 6501 * @param bd_addr 6502 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6503 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6504 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6505 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6506 */ 6507 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){ 6508 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6509 if (connection == NULL) { 6510 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6511 } 6512 connection->classic_oob_c_192 = c_192; 6513 connection->classic_oob_r_192 = r_192; 6514 6515 // ignore P-256 if not supported by us 6516 if (hci_stack->secure_connections_active){ 6517 connection->classic_oob_c_256 = c_256; 6518 connection->classic_oob_r_256 = r_256; 6519 } 6520 6521 return ERROR_CODE_SUCCESS; 6522 } 6523 /** 6524 * @brief Generate new OOB data 6525 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6526 */ 6527 void gap_ssp_generate_oob_data(void){ 6528 hci_stack->classic_read_local_oob_data = true; 6529 hci_run(); 6530 } 6531 6532 #endif 6533 6534 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6535 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6536 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6537 if (connection == NULL) { 6538 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6539 } 6540 6541 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6542 connection->link_key_type = type; 6543 6544 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6545 } 6546 6547 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6548 /** 6549 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6550 * @param inquiry_mode see bluetooth_defines.h 6551 */ 6552 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6553 hci_stack->inquiry_mode = inquiry_mode; 6554 } 6555 6556 /** 6557 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6558 */ 6559 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6560 hci_stack->sco_voice_setting = voice_setting; 6561 } 6562 6563 /** 6564 * @brief Get SCO Voice Setting 6565 * @return current voice setting 6566 */ 6567 uint16_t hci_get_sco_voice_setting(void){ 6568 return hci_stack->sco_voice_setting; 6569 } 6570 6571 static int hci_have_usb_transport(void){ 6572 if (!hci_stack->hci_transport) return 0; 6573 const char * transport_name = hci_stack->hci_transport->name; 6574 if (!transport_name) return 0; 6575 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6576 } 6577 6578 /** @brief Get SCO packet length for current SCO Voice setting 6579 * @note Using SCO packets of the exact length is required for USB transfer 6580 * @return Length of SCO packets in bytes (not audio frames) 6581 */ 6582 uint16_t hci_get_sco_packet_length(void){ 6583 uint16_t sco_packet_length = 0; 6584 6585 #ifdef ENABLE_SCO_OVER_HCI 6586 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6587 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6588 6589 if (hci_have_usb_transport()){ 6590 // see Core Spec for H2 USB Transfer. 6591 // 3 byte SCO header + 24 bytes per connection 6592 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6593 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6594 } else { 6595 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6596 sco_packet_length = 3 + 60 * multiplier; 6597 // assert that it still fits inside an SCO buffer 6598 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6599 sco_packet_length = 3 + 60; 6600 } 6601 } 6602 #endif 6603 6604 #ifdef HAVE_SCO_TRANSPORT 6605 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6606 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6607 sco_packet_length = 3 + 60 * multiplier; 6608 #endif 6609 return sco_packet_length; 6610 } 6611 6612 /** 6613 * @brief Sets the master/slave policy 6614 * @param policy (0: attempt to become master, 1: let connecting device decide) 6615 */ 6616 void hci_set_master_slave_policy(uint8_t policy){ 6617 hci_stack->master_slave_policy = policy; 6618 } 6619 6620 #endif 6621 6622 HCI_STATE hci_get_state(void){ 6623 return hci_stack->state; 6624 } 6625 6626 #ifdef ENABLE_CLASSIC 6627 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6628 hci_stack->gap_classic_accept_callback = accept_callback; 6629 } 6630 #endif 6631 6632 /** 6633 * @brief Set callback for Bluetooth Hardware Error 6634 */ 6635 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6636 hci_stack->hardware_error_callback = fn; 6637 } 6638 6639 void hci_disconnect_all(void){ 6640 btstack_linked_list_iterator_t it; 6641 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6642 while (btstack_linked_list_iterator_has_next(&it)){ 6643 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6644 if (con->state == SENT_DISCONNECT) continue; 6645 con->state = SEND_DISCONNECT; 6646 } 6647 hci_run(); 6648 } 6649 6650 uint16_t hci_get_manufacturer(void){ 6651 return hci_stack->manufacturer; 6652 } 6653 6654 #ifdef ENABLE_BLE 6655 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6656 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6657 if (!hci_con) return NULL; 6658 return &hci_con->sm_connection; 6659 } 6660 6661 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6662 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6663 #endif 6664 6665 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6666 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6667 if (hci_connection == NULL) return 0; 6668 if (hci_is_le_connection(hci_connection)){ 6669 #ifdef ENABLE_BLE 6670 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6671 if (sm_conn->sm_connection_encrypted) { 6672 return sm_conn->sm_actual_encryption_key_size; 6673 } 6674 #endif 6675 } else { 6676 #ifdef ENABLE_CLASSIC 6677 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6678 return hci_connection->encryption_key_size; 6679 } 6680 #endif 6681 } 6682 return 0; 6683 } 6684 6685 int gap_authenticated(hci_con_handle_t con_handle){ 6686 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6687 if (hci_connection == NULL) return 0; 6688 6689 switch (hci_connection->address_type){ 6690 #ifdef ENABLE_BLE 6691 case BD_ADDR_TYPE_LE_PUBLIC: 6692 case BD_ADDR_TYPE_LE_RANDOM: 6693 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6694 return hci_connection->sm_connection.sm_connection_authenticated; 6695 #endif 6696 #ifdef ENABLE_CLASSIC 6697 case BD_ADDR_TYPE_SCO: 6698 case BD_ADDR_TYPE_ACL: 6699 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6700 #endif 6701 default: 6702 return 0; 6703 } 6704 } 6705 6706 int gap_secure_connection(hci_con_handle_t con_handle){ 6707 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6708 if (hci_connection == NULL) return 0; 6709 6710 switch (hci_connection->address_type){ 6711 #ifdef ENABLE_BLE 6712 case BD_ADDR_TYPE_LE_PUBLIC: 6713 case BD_ADDR_TYPE_LE_RANDOM: 6714 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6715 return hci_connection->sm_connection.sm_connection_sc; 6716 #endif 6717 #ifdef ENABLE_CLASSIC 6718 case BD_ADDR_TYPE_SCO: 6719 case BD_ADDR_TYPE_ACL: 6720 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6721 #endif 6722 default: 6723 return 0; 6724 } 6725 } 6726 6727 bool gap_bonded(hci_con_handle_t con_handle){ 6728 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6729 if (hci_connection == NULL) return 0; 6730 6731 #ifdef ENABLE_CLASSIC 6732 link_key_t link_key; 6733 link_key_type_t link_key_type; 6734 #endif 6735 switch (hci_connection->address_type){ 6736 #ifdef ENABLE_BLE 6737 case BD_ADDR_TYPE_LE_PUBLIC: 6738 case BD_ADDR_TYPE_LE_RANDOM: 6739 return hci_connection->sm_connection.sm_le_db_index >= 0; 6740 #endif 6741 #ifdef ENABLE_CLASSIC 6742 case BD_ADDR_TYPE_SCO: 6743 case BD_ADDR_TYPE_ACL: 6744 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6745 #endif 6746 default: 6747 return false; 6748 } 6749 } 6750 6751 #ifdef ENABLE_BLE 6752 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6753 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6754 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6755 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6756 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6757 return sm_conn->sm_connection_authorization_state; 6758 } 6759 #endif 6760 6761 #ifdef ENABLE_CLASSIC 6762 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){ 6763 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6764 if (!conn) return GAP_CONNECTION_INVALID; 6765 conn->sniff_min_interval = sniff_min_interval; 6766 conn->sniff_max_interval = sniff_max_interval; 6767 conn->sniff_attempt = sniff_attempt; 6768 conn->sniff_timeout = sniff_timeout; 6769 hci_run(); 6770 return 0; 6771 } 6772 6773 /** 6774 * @brief Exit Sniff mode 6775 * @param con_handle 6776 @ @return 0 if ok 6777 */ 6778 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6779 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6780 if (!conn) return GAP_CONNECTION_INVALID; 6781 conn->sniff_min_interval = 0xffff; 6782 hci_run(); 6783 return 0; 6784 } 6785 6786 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){ 6787 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6788 if (!conn) return GAP_CONNECTION_INVALID; 6789 conn->sniff_subrating_max_latency = max_latency; 6790 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6791 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6792 hci_run(); 6793 return ERROR_CODE_SUCCESS; 6794 } 6795 6796 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){ 6797 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6798 if (!conn) return GAP_CONNECTION_INVALID; 6799 conn->qos_service_type = service_type; 6800 conn->qos_token_rate = token_rate; 6801 conn->qos_peak_bandwidth = peak_bandwidth; 6802 conn->qos_latency = latency; 6803 conn->qos_delay_variation = delay_variation; 6804 hci_run(); 6805 return ERROR_CODE_SUCCESS; 6806 } 6807 6808 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6809 hci_stack->new_page_scan_interval = page_scan_interval; 6810 hci_stack->new_page_scan_window = page_scan_window; 6811 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6812 hci_run(); 6813 } 6814 6815 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6816 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6817 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6818 hci_run(); 6819 } 6820 6821 #endif 6822 6823 void hci_halting_defer(void){ 6824 if (hci_stack->state != HCI_STATE_HALTING) return; 6825 switch (hci_stack->substate){ 6826 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6827 case HCI_HALTING_CLOSE: 6828 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6829 break; 6830 default: 6831 break; 6832 } 6833 } 6834 6835 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6836 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6837 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6838 if (le_device_db_index >= le_device_db_max_count()) return; 6839 uint8_t offset = le_device_db_index >> 3; 6840 uint8_t mask = 1 << (le_device_db_index & 7); 6841 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6842 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6843 // note: go back to remove entries, otherwise, a remove + add will skip the add 6844 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6845 } 6846 } 6847 6848 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6849 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6850 if (le_device_db_index >= le_device_db_max_count()) return; 6851 uint8_t offset = le_device_db_index >> 3; 6852 uint8_t mask = 1 << (le_device_db_index & 7); 6853 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6854 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6855 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6856 } 6857 } 6858 6859 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6860 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6861 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6862 } 6863 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6864 // restart le resolving list update 6865 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6866 } 6867 return ERROR_CODE_SUCCESS; 6868 } 6869 #endif 6870 6871 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6872 void hci_setup_test_connections_fuzz(void){ 6873 hci_connection_t * conn; 6874 6875 // default address: 66:55:44:33:00:01 6876 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6877 6878 // setup Controller info 6879 hci_stack->num_cmd_packets = 255; 6880 hci_stack->acl_packets_total_num = 255; 6881 6882 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6883 addr[5] = 0x01; 6884 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6885 conn->con_handle = addr[5]; 6886 conn->role = HCI_ROLE_SLAVE; 6887 conn->state = RECEIVED_CONNECTION_REQUEST; 6888 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6889 6890 // setup incoming Classic SCO connection with con handle 0x0002 6891 addr[5] = 0x02; 6892 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6893 conn->con_handle = addr[5]; 6894 conn->role = HCI_ROLE_SLAVE; 6895 conn->state = RECEIVED_CONNECTION_REQUEST; 6896 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6897 6898 // setup ready Classic ACL connection with con handle 0x0003 6899 addr[5] = 0x03; 6900 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6901 conn->con_handle = addr[5]; 6902 conn->role = HCI_ROLE_SLAVE; 6903 conn->state = OPEN; 6904 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6905 6906 // setup ready Classic SCO connection with con handle 0x0004 6907 addr[5] = 0x04; 6908 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6909 conn->con_handle = addr[5]; 6910 conn->role = HCI_ROLE_SLAVE; 6911 conn->state = OPEN; 6912 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6913 6914 // setup ready LE ACL connection with con handle 0x005 and public address 6915 addr[5] = 0x05; 6916 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6917 conn->con_handle = addr[5]; 6918 conn->role = HCI_ROLE_SLAVE; 6919 conn->state = OPEN; 6920 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6921 conn->sm_connection.sm_connection_encrypted = 1; 6922 } 6923 6924 void hci_free_connections_fuzz(void){ 6925 btstack_linked_list_iterator_t it; 6926 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6927 while (btstack_linked_list_iterator_has_next(&it)){ 6928 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6929 btstack_linked_list_iterator_remove(&it); 6930 btstack_memory_hci_connection_free(con); 6931 } 6932 } 6933 void hci_simulate_working_fuzz(void){ 6934 hci_init_done(); 6935 hci_stack->num_cmd_packets = 255; 6936 } 6937 #endif 6938