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