1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 78 #ifndef HCI_HOST_ACL_PACKET_NUM 79 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 80 #endif 81 #ifndef HCI_HOST_ACL_PACKET_LEN 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 83 #endif 84 #ifndef HCI_HOST_SCO_PACKET_NUM 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_LEN 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 89 #endif 90 #endif 91 92 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 93 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_IDLE 0x00 115 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 116 #define GAP_INQUIRY_STATE_ACTIVE 0x81 117 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 118 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 119 120 // GAP Remote Name Request 121 #define GAP_REMOTE_NAME_STATE_IDLE 0 122 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 123 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 124 125 // GAP Pairing 126 #define GAP_PAIRING_STATE_IDLE 0 127 #define GAP_PAIRING_STATE_SEND_PIN 1 128 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 129 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 130 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 132 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 133 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 134 135 // prototypes 136 #ifdef ENABLE_CLASSIC 137 static void hci_update_scan_enable(void); 138 static void hci_emit_discoverable_enabled(uint8_t enabled); 139 static int hci_local_ssp_activated(void); 140 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 141 static bool hci_ssp_supported(hci_connection_t * connection); 142 static void hci_notify_if_sco_can_send_now(void); 143 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 144 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 145 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 146 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 147 static void hci_connection_timestamp(hci_connection_t *connection); 148 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 149 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 150 #endif 151 152 static int hci_power_control_on(void); 153 static void hci_power_control_off(void); 154 static void hci_state_reset(void); 155 static void hci_emit_transport_packet_sent(void); 156 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 157 static void hci_emit_nr_connections_changed(void); 158 static void hci_emit_hci_open_failed(void); 159 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 160 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 161 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 162 static void hci_run(void); 163 static int hci_is_le_connection(hci_connection_t * connection); 164 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 #endif 169 170 #ifdef ENABLE_BLE 171 #ifdef ENABLE_LE_CENTRAL 172 // called from test/ble_client/advertising_data_parser.c 173 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 174 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 175 static hci_connection_t * gap_get_outgoing_connection(void); 176 #endif 177 #endif 178 179 // the STACK is here 180 #ifndef HAVE_MALLOC 181 static hci_stack_t hci_stack_static; 182 #endif 183 static hci_stack_t * hci_stack = NULL; 184 185 #ifdef ENABLE_CLASSIC 186 // default name 187 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 188 189 // test helper 190 static uint8_t disable_l2cap_timeouts = 0; 191 #endif 192 193 // reset connection state on create and on reconnect 194 // don't overwrite addr, con handle, role 195 static void hci_connection_init(hci_connection_t * conn){ 196 conn->authentication_flags = AUTH_FLAG_NONE; 197 conn->bonding_flags = 0; 198 conn->requested_security_level = LEVEL_0; 199 #ifdef ENABLE_CLASSIC 200 conn->request_role = HCI_ROLE_INVALID; 201 conn->sniff_subrating_max_latency = 0xffff; 202 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 203 conn->link_key_type = INVALID_LINK_KEY; 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 #ifdef ENABLE_CLASSIC_PAIRING_OOB 220 conn->classic_oob_c_192 = NULL; 221 conn->classic_oob_r_192 = NULL; 222 conn->classic_oob_c_256 = NULL; 223 conn->classic_oob_r_256 = NULL; 224 #endif 225 } 226 227 /** 228 * create connection for given address 229 * 230 * @return connection OR NULL, if no memory left 231 */ 232 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 233 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 234 235 hci_connection_t * conn = btstack_memory_hci_connection_get(); 236 if (!conn) return NULL; 237 hci_connection_init(conn); 238 239 bd_addr_copy(conn->address, addr); 240 conn->address_type = addr_type; 241 conn->con_handle = HCI_CON_HANDLE_INVALID; 242 conn->role = HCI_ROLE_INVALID; 243 244 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 245 246 return conn; 247 } 248 249 250 /** 251 * get le connection parameter range 252 * 253 * @return le connection parameter range struct 254 */ 255 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 256 *range = hci_stack->le_connection_parameter_range; 257 } 258 259 /** 260 * set le connection parameter range 261 * 262 */ 263 264 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 265 hci_stack->le_connection_parameter_range = *range; 266 } 267 268 /** 269 * @brief Test if connection parameters are inside in existing rage 270 * @param conn_interval_min (unit: 1.25ms) 271 * @param conn_interval_max (unit: 1.25ms) 272 * @param conn_latency 273 * @param supervision_timeout (unit: 10ms) 274 * @returns 1 if included 275 */ 276 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 277 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 278 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 279 280 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 281 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 282 283 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 284 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 285 286 return 1; 287 } 288 289 /** 290 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 291 * @note: default: 1 292 * @param max_peripheral_connections 293 */ 294 #ifdef ENABLE_LE_PERIPHERAL 295 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 296 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 297 } 298 #endif 299 300 /** 301 * get hci connections iterator 302 * 303 * @return hci connections iterator 304 */ 305 306 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 307 btstack_linked_list_iterator_init(it, &hci_stack->connections); 308 } 309 310 /** 311 * get connection for a given handle 312 * 313 * @return connection OR NULL, if not found 314 */ 315 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 320 if ( item->con_handle == con_handle ) { 321 return item; 322 } 323 } 324 return NULL; 325 } 326 327 /** 328 * get connection for given address 329 * 330 * @return connection OR NULL, if not found 331 */ 332 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != addr_type) continue; 338 if (memcmp(addr, connection->address, 6) != 0) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 345 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 346 } 347 348 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 350 } 351 352 #ifdef ENABLE_CLASSIC 353 354 #ifdef ENABLE_SCO_OVER_HCI 355 static int hci_number_sco_connections(void){ 356 int connections = 0; 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 361 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 362 connections++; 363 } 364 return connections; 365 } 366 #endif 367 368 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 369 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 370 #ifdef HAVE_EMBEDDED_TICK 371 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 372 // connections might be timed out 373 hci_emit_l2cap_check_timeout(connection); 374 } 375 #else 376 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 377 // connections might be timed out 378 hci_emit_l2cap_check_timeout(connection); 379 } 380 #endif 381 } 382 383 static void hci_connection_timestamp(hci_connection_t *connection){ 384 #ifdef HAVE_EMBEDDED_TICK 385 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 386 #else 387 connection->timestamp = btstack_run_loop_get_time_ms(); 388 #endif 389 } 390 391 /** 392 * add authentication flags and reset timer 393 * @note: assumes classic connection 394 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 395 */ 396 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 397 bd_addr_t addr; 398 reverse_bd_addr(bd_addr, addr); 399 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 400 if (conn) { 401 connectionSetAuthenticationFlags(conn, flags); 402 hci_connection_timestamp(conn); 403 } 404 } 405 406 static bool hci_pairing_active(hci_connection_t * hci_connection){ 407 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 408 } 409 410 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 411 if (hci_pairing_active(hci_connection)) return; 412 if (ssp){ 413 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 414 } else { 415 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 416 } 417 // if we are initiator, we have sent an HCI Authenticate Request 418 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 419 420 // if we are responder, use minimal service security level as required level 421 if (!initiator){ 422 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 423 } 424 425 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 426 427 uint8_t event[12]; 428 event[0] = GAP_EVENT_PAIRING_STARTED; 429 event[1] = 10; 430 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 431 reverse_bd_addr(hci_connection->address, &event[4]); 432 event[10] = (uint8_t) ssp; 433 event[11] = (uint8_t) initiator; 434 hci_emit_event(event, sizeof(event), 1); 435 } 436 437 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 438 hci_connection->requested_security_level = LEVEL_0; 439 if (!hci_pairing_active(hci_connection)) return; 440 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 441 #ifdef ENABLE_CLASSIC_PAIRING_OOB 442 hci_connection->classic_oob_c_192 = NULL; 443 hci_connection->classic_oob_r_192 = NULL; 444 hci_connection->classic_oob_c_256 = NULL; 445 hci_connection->classic_oob_r_256 = NULL; 446 #endif 447 log_info("pairing complete, status %02x", status); 448 449 uint8_t event[12]; 450 event[0] = GAP_EVENT_PAIRING_COMPLETE; 451 event[1] = 9; 452 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 453 reverse_bd_addr(hci_connection->address, &event[4]); 454 event[10] = status; 455 hci_emit_event(event, sizeof(event), 1); 456 } 457 458 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 459 hci_connection_t * conn = hci_connection_for_handle(handle); 460 if (!conn) return false; 461 return hci_pairing_active(conn); 462 } 463 464 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 465 if (!hci_stack->link_key_db) return; 466 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 467 hci_stack->link_key_db->delete_link_key(addr); 468 } 469 470 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 471 if (!hci_stack->link_key_db) return; 472 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 473 hci_stack->link_key_db->put_link_key(addr, link_key, type); 474 } 475 476 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 477 if (!hci_stack->link_key_db) return false; 478 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 479 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 480 return result; 481 } 482 483 void gap_delete_all_link_keys(void){ 484 bd_addr_t addr; 485 link_key_t link_key; 486 link_key_type_t type; 487 btstack_link_key_iterator_t it; 488 int ok = gap_link_key_iterator_init(&it); 489 if (!ok) { 490 log_error("could not initialize iterator"); 491 return; 492 } 493 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 494 gap_drop_link_key_for_bd_addr(addr); 495 } 496 gap_link_key_iterator_done(&it); 497 } 498 499 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 500 if (!hci_stack->link_key_db) return 0; 501 if (!hci_stack->link_key_db->iterator_init) return 0; 502 return hci_stack->link_key_db->iterator_init(it); 503 } 504 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 505 if (!hci_stack->link_key_db) return 0; 506 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 507 } 508 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 509 if (!hci_stack->link_key_db) return; 510 hci_stack->link_key_db->iterator_done(it); 511 } 512 #endif 513 514 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 515 switch (address_type){ 516 case BD_ADDR_TYPE_LE_PUBLIC: 517 case BD_ADDR_TYPE_LE_RANDOM: 518 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 519 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 520 return true; 521 default: 522 return false; 523 } 524 } 525 526 static int hci_is_le_connection(hci_connection_t * connection){ 527 return hci_is_le_connection_type(connection->address_type); 528 } 529 530 /** 531 * count connections 532 */ 533 static int nr_hci_connections(void){ 534 int count = 0; 535 btstack_linked_item_t *it; 536 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 537 count++; 538 } 539 return count; 540 } 541 542 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 543 544 unsigned int num_packets_sent_classic = 0; 545 unsigned int num_packets_sent_le = 0; 546 547 btstack_linked_item_t *it; 548 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 549 hci_connection_t * connection = (hci_connection_t *) it; 550 if (hci_is_le_connection(connection)){ 551 num_packets_sent_le += connection->num_packets_sent; 552 } 553 if (connection->address_type == BD_ADDR_TYPE_ACL){ 554 num_packets_sent_classic += connection->num_packets_sent; 555 } 556 } 557 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 558 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 559 int free_slots_le = 0; 560 561 if (free_slots_classic < 0){ 562 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 563 return 0; 564 } 565 566 if (hci_stack->le_acl_packets_total_num){ 567 // if we have LE slots, they are used 568 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 569 if (free_slots_le < 0){ 570 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 571 return 0; 572 } 573 } else { 574 // otherwise, classic slots are used for LE, too 575 free_slots_classic -= num_packets_sent_le; 576 if (free_slots_classic < 0){ 577 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 578 return 0; 579 } 580 } 581 582 switch (address_type){ 583 case BD_ADDR_TYPE_UNKNOWN: 584 log_error("hci_number_free_acl_slots: unknown address type"); 585 return 0; 586 587 case BD_ADDR_TYPE_ACL: 588 return free_slots_classic; 589 590 default: 591 if (hci_stack->le_acl_packets_total_num){ 592 return free_slots_le; 593 } 594 return free_slots_classic; 595 } 596 } 597 598 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 599 // get connection type 600 hci_connection_t * connection = hci_connection_for_handle(con_handle); 601 if (!connection){ 602 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 603 return 0; 604 } 605 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 static int hci_number_free_sco_slots(void){ 610 unsigned int num_sco_packets_sent = 0; 611 btstack_linked_item_t *it; 612 if (hci_stack->synchronous_flow_control_enabled){ 613 // explicit flow control 614 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 615 hci_connection_t * connection = (hci_connection_t *) it; 616 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 617 num_sco_packets_sent += connection->num_packets_sent; 618 } 619 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 620 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 621 return 0; 622 } 623 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 624 } else { 625 // implicit flow control -- TODO 626 int num_ready = 0; 627 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 628 hci_connection_t * connection = (hci_connection_t *) it; 629 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 630 if (connection->sco_tx_ready == 0) continue; 631 num_ready++; 632 } 633 return num_ready; 634 } 635 } 636 #endif 637 638 // only used to send HCI Host Number Completed Packets 639 static int hci_can_send_comand_packet_transport(void){ 640 if (hci_stack->hci_packet_buffer_reserved) return 0; 641 642 // check for async hci transport implementations 643 if (hci_stack->hci_transport->can_send_packet_now){ 644 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 645 return 0; 646 } 647 } 648 return 1; 649 } 650 651 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 652 bool hci_can_send_command_packet_now(void){ 653 if (hci_can_send_comand_packet_transport() == 0) return false; 654 return hci_stack->num_cmd_packets > 0u; 655 } 656 657 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 658 // check for async hci transport implementations 659 if (!hci_stack->hci_transport->can_send_packet_now) return true; 660 return hci_stack->hci_transport->can_send_packet_now(packet_type); 661 } 662 663 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 664 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 665 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 666 } 667 668 bool hci_can_send_acl_le_packet_now(void){ 669 if (hci_stack->hci_packet_buffer_reserved) return false; 670 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 671 } 672 673 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 674 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 675 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 676 } 677 678 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 679 if (hci_stack->hci_packet_buffer_reserved) return false; 680 return hci_can_send_prepared_acl_packet_now(con_handle); 681 } 682 683 #ifdef ENABLE_CLASSIC 684 bool hci_can_send_acl_classic_packet_now(void){ 685 if (hci_stack->hci_packet_buffer_reserved) return false; 686 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 687 } 688 689 bool hci_can_send_prepared_sco_packet_now(void){ 690 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 691 if (hci_have_usb_transport()){ 692 return hci_stack->sco_can_send_now; 693 } else { 694 return hci_number_free_sco_slots() > 0; 695 } 696 } 697 698 bool hci_can_send_sco_packet_now(void){ 699 if (hci_stack->hci_packet_buffer_reserved) return false; 700 return hci_can_send_prepared_sco_packet_now(); 701 } 702 703 void hci_request_sco_can_send_now_event(void){ 704 hci_stack->sco_waiting_for_can_send_now = 1; 705 hci_notify_if_sco_can_send_now(); 706 } 707 #endif 708 709 // used for internal checks in l2cap.c 710 bool hci_is_packet_buffer_reserved(void){ 711 return hci_stack->hci_packet_buffer_reserved; 712 } 713 714 // reserves outgoing packet buffer. @returns 1 if successful 715 bool hci_reserve_packet_buffer(void){ 716 if (hci_stack->hci_packet_buffer_reserved) { 717 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 718 return false; 719 } 720 hci_stack->hci_packet_buffer_reserved = true; 721 return true; 722 } 723 724 void hci_release_packet_buffer(void){ 725 hci_stack->hci_packet_buffer_reserved = false; 726 } 727 728 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 729 static int hci_transport_synchronous(void){ 730 return hci_stack->hci_transport->can_send_packet_now == NULL; 731 } 732 733 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 734 735 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 736 737 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 738 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 739 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 740 max_acl_data_packet_length = hci_stack->le_data_packets_length; 741 } 742 743 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 744 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 745 max_acl_data_packet_length = connection->le_max_tx_octets; 746 } 747 #endif 748 749 log_debug("hci_send_acl_packet_fragments entered"); 750 751 uint8_t status = ERROR_CODE_SUCCESS; 752 // multiple packets could be send on a synchronous HCI transport 753 while (true){ 754 755 log_debug("hci_send_acl_packet_fragments loop entered"); 756 757 // get current data 758 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 759 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 760 bool more_fragments = false; 761 762 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 763 if (current_acl_data_packet_length > max_acl_data_packet_length){ 764 more_fragments = true; 765 current_acl_data_packet_length = max_acl_data_packet_length; 766 } 767 768 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 769 if (acl_header_pos > 0u){ 770 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 771 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 772 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 773 } 774 775 // update header len 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 777 778 // count packet 779 connection->num_packets_sent++; 780 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 781 782 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 783 if (more_fragments){ 784 // update start of next fragment to send 785 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 786 } else { 787 // done 788 hci_stack->acl_fragmentation_pos = 0; 789 hci_stack->acl_fragmentation_total_size = 0; 790 } 791 792 // send packet 793 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 794 const int size = current_acl_data_packet_length + 4; 795 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 796 hci_stack->acl_fragmentation_tx_active = 1; 797 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 798 if (err != 0){ 799 // no error from HCI Transport expected 800 status = ERROR_CODE_HARDWARE_FAILURE; 801 } 802 803 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 804 805 // done yet? 806 if (!more_fragments) break; 807 808 // can send more? 809 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 810 } 811 812 log_debug("hci_send_acl_packet_fragments loop over"); 813 814 // release buffer now for synchronous transport 815 if (hci_transport_synchronous()){ 816 hci_stack->acl_fragmentation_tx_active = 0; 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 } 820 821 return status; 822 } 823 824 // pre: caller has reserved the packet buffer 825 uint8_t hci_send_acl_packet_buffer(int size){ 826 btstack_assert(hci_stack->hci_packet_buffer_reserved); 827 828 uint8_t * packet = hci_stack->hci_packet_buffer; 829 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 830 831 // check for free places on Bluetooth module 832 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 833 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return BTSTACK_ACL_BUFFERS_FULL; 837 } 838 839 hci_connection_t *connection = hci_connection_for_handle( con_handle); 840 if (!connection) { 841 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 845 } 846 847 #ifdef ENABLE_CLASSIC 848 hci_connection_timestamp(connection); 849 #endif 850 851 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 852 853 // setup data 854 hci_stack->acl_fragmentation_total_size = size; 855 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 856 857 return hci_send_acl_packet_fragments(connection); 858 } 859 860 #ifdef ENABLE_CLASSIC 861 // pre: caller has reserved the packet buffer 862 uint8_t hci_send_sco_packet_buffer(int size){ 863 btstack_assert(hci_stack->hci_packet_buffer_reserved); 864 865 uint8_t * packet = hci_stack->hci_packet_buffer; 866 867 // skip checks in loopback mode 868 if (!hci_stack->loopback_mode){ 869 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 870 871 // check for free places on Bluetooth module 872 if (!hci_can_send_prepared_sco_packet_now()) { 873 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 874 hci_release_packet_buffer(); 875 hci_emit_transport_packet_sent(); 876 return BTSTACK_ACL_BUFFERS_FULL; 877 } 878 879 // track send packet in connection struct 880 hci_connection_t *connection = hci_connection_for_handle( con_handle); 881 if (!connection) { 882 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 883 hci_release_packet_buffer(); 884 hci_emit_transport_packet_sent(); 885 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 886 } 887 888 if (hci_have_usb_transport()){ 889 // token used 890 hci_stack->sco_can_send_now = false; 891 } else { 892 if (hci_stack->synchronous_flow_control_enabled){ 893 connection->num_packets_sent++; 894 } else { 895 connection->sco_tx_ready--; 896 } 897 } 898 } 899 900 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 901 902 #ifdef HAVE_SCO_TRANSPORT 903 hci_stack->sco_transport->send_packet(packet, size); 904 hci_release_packet_buffer(); 905 hci_emit_transport_packet_sent(); 906 907 return 0; 908 #else 909 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 910 if (hci_transport_synchronous()){ 911 hci_release_packet_buffer(); 912 hci_emit_transport_packet_sent(); 913 } 914 915 if (err != 0){ 916 return ERROR_CODE_HARDWARE_FAILURE; 917 } 918 return ERROR_CODE_SUCCESS; 919 #endif 920 } 921 #endif 922 923 static void acl_handler(uint8_t *packet, uint16_t size){ 924 925 // get info 926 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 927 hci_connection_t *conn = hci_connection_for_handle(con_handle); 928 uint8_t acl_flags = READ_ACL_FLAGS(packet); 929 uint16_t acl_length = READ_ACL_LENGTH(packet); 930 931 // ignore non-registered handle 932 if (!conn){ 933 log_error("acl_handler called with non-registered handle %u!" , con_handle); 934 return; 935 } 936 937 // assert packet is complete 938 if ((acl_length + 4u) != size){ 939 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 940 return; 941 } 942 943 #ifdef ENABLE_CLASSIC 944 // update idle timestamp 945 hci_connection_timestamp(conn); 946 #endif 947 948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 949 hci_stack->host_completed_packets = 1; 950 conn->num_packets_completed++; 951 #endif 952 953 // handle different packet types 954 switch (acl_flags & 0x03u) { 955 956 case 0x01: // continuation fragment 957 958 // sanity checks 959 if (conn->acl_recombination_pos == 0u) { 960 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 961 return; 962 } 963 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 964 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 965 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 966 conn->acl_recombination_pos = 0; 967 return; 968 } 969 970 // append fragment payload (header already stored) 971 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 972 &packet[4], acl_length); 973 conn->acl_recombination_pos += acl_length; 974 975 // forward complete L2CAP packet if complete. 976 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 977 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 978 // reset recombination buffer 979 conn->acl_recombination_length = 0; 980 conn->acl_recombination_pos = 0; 981 } 982 break; 983 984 case 0x02: { // first fragment 985 986 // sanity check 987 if (conn->acl_recombination_pos) { 988 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 989 conn->acl_recombination_pos = 0; 990 } 991 992 // peek into L2CAP packet! 993 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 994 995 // compare fragment size to L2CAP packet size 996 if (acl_length >= (l2cap_length + 4u)){ 997 // forward fragment as L2CAP packet 998 hci_emit_acl_packet(packet, acl_length + 4u); 999 } else { 1000 1001 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1002 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1003 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1004 return; 1005 } 1006 1007 // store first fragment and tweak acl length for complete package 1008 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1009 packet, acl_length + 4u); 1010 conn->acl_recombination_pos = acl_length + 4u; 1011 conn->acl_recombination_length = l2cap_length; 1012 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1013 } 1014 break; 1015 1016 } 1017 default: 1018 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1019 return; 1020 } 1021 1022 // execute main loop 1023 hci_run(); 1024 } 1025 1026 static void hci_connection_stop_timer(hci_connection_t * conn){ 1027 btstack_run_loop_remove_timer(&conn->timeout); 1028 #ifdef ENABLE_CLASSIC 1029 btstack_run_loop_remove_timer(&conn->timeout_sco); 1030 #endif 1031 } 1032 1033 static void hci_shutdown_connection(hci_connection_t *conn){ 1034 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1035 1036 #ifdef ENABLE_CLASSIC 1037 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1038 bd_addr_type_t addr_type = conn->address_type; 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 hci_con_handle_t con_handle = conn->con_handle; 1042 #endif 1043 #endif 1044 1045 hci_connection_stop_timer(conn); 1046 1047 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1048 btstack_memory_hci_connection_free( conn ); 1049 1050 // now it's gone 1051 hci_emit_nr_connections_changed(); 1052 1053 #ifdef ENABLE_CLASSIC 1054 #ifdef ENABLE_SCO_OVER_HCI 1055 // update SCO 1056 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1057 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1058 } 1059 #endif 1060 #ifdef HAVE_SCO_TRANSPORT 1061 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1062 hci_stack->sco_transport->close(con_handle); 1063 } 1064 #endif 1065 #endif 1066 } 1067 1068 #ifdef ENABLE_CLASSIC 1069 1070 static const uint16_t packet_type_sizes[] = { 1071 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1072 HCI_ACL_DH1_SIZE, 0, 0, 0, 1073 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1074 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1075 }; 1076 static const uint8_t packet_type_feature_requirement_bit[] = { 1077 0, // 3 slot packets 1078 1, // 5 slot packets 1079 25, // EDR 2 mpbs 1080 26, // EDR 3 mbps 1081 39, // 3 slot EDR packts 1082 40, // 5 slot EDR packet 1083 }; 1084 static const uint16_t packet_type_feature_packet_mask[] = { 1085 0x0f00, // 3 slot packets 1086 0xf000, // 5 slot packets 1087 0x1102, // EDR 2 mpbs 1088 0x2204, // EDR 3 mbps 1089 0x0300, // 3 slot EDR packts 1090 0x3000, // 5 slot EDR packet 1091 }; 1092 1093 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1094 // enable packet types based on size 1095 uint16_t packet_types = 0; 1096 unsigned int i; 1097 for (i=0;i<16;i++){ 1098 if (packet_type_sizes[i] == 0) continue; 1099 if (packet_type_sizes[i] <= buffer_size){ 1100 packet_types |= 1 << i; 1101 } 1102 } 1103 // disable packet types due to missing local supported features 1104 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1105 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1106 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1107 if (feature_set) continue; 1108 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1109 packet_types &= ~packet_type_feature_packet_mask[i]; 1110 } 1111 // flip bits for "may not be used" 1112 packet_types ^= 0x3306; 1113 return packet_types; 1114 } 1115 1116 uint16_t hci_usable_acl_packet_types(void){ 1117 return hci_stack->packet_types; 1118 } 1119 #endif 1120 1121 uint8_t* hci_get_outgoing_packet_buffer(void){ 1122 // hci packet buffer is >= acl data packet length 1123 return hci_stack->hci_packet_buffer; 1124 } 1125 1126 uint16_t hci_max_acl_data_packet_length(void){ 1127 return hci_stack->acl_data_packet_length; 1128 } 1129 1130 #ifdef ENABLE_CLASSIC 1131 bool hci_extended_sco_link_supported(void){ 1132 // No. 31, byte 3, bit 7 1133 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1134 } 1135 #endif 1136 1137 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1138 // No. 54, byte 6, bit 6 1139 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1140 } 1141 1142 static int gap_ssp_supported(void){ 1143 // No. 51, byte 6, bit 3 1144 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1145 } 1146 1147 static int hci_classic_supported(void){ 1148 #ifdef ENABLE_CLASSIC 1149 // No. 37, byte 4, bit 5, = No BR/EDR Support 1150 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1151 #else 1152 return 0; 1153 #endif 1154 } 1155 1156 static int hci_le_supported(void){ 1157 #ifdef ENABLE_BLE 1158 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1159 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1160 #else 1161 return 0; 1162 #endif 1163 } 1164 1165 #ifdef ENABLE_BLE 1166 1167 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1168 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1169 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1170 } else { 1171 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1172 } 1173 } 1174 1175 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1176 *addr_type = hci_stack->le_own_addr_type; 1177 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1178 } 1179 1180 #ifdef ENABLE_LE_PERIPHERAL 1181 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1182 *addr_type = hci_stack->le_advertisements_own_addr_type; 1183 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1184 }; 1185 #endif 1186 1187 #ifdef ENABLE_LE_CENTRAL 1188 1189 /** 1190 * @brief Get own addr type and address used for LE connections (Central) 1191 */ 1192 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1193 *addr_type = hci_stack->le_connection_own_addr_type; 1194 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1195 } 1196 1197 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1198 1199 int offset = 3; 1200 int num_reports = packet[offset]; 1201 offset += 1; 1202 1203 int i; 1204 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1205 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1206 for (i=0; (i<num_reports) && (offset < size);i++){ 1207 // sanity checks on data_length: 1208 uint8_t data_length = packet[offset + 8]; 1209 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1210 if ((offset + 9u + data_length + 1u) > size) return; 1211 // setup event 1212 uint8_t event_size = 10u + data_length; 1213 int pos = 0; 1214 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1215 event[pos++] = event_size; 1216 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1217 offset += 8; 1218 pos += 8; 1219 event[pos++] = packet[offset + 1 + data_length]; // rssi 1220 event[pos++] = data_length; 1221 offset++; 1222 (void)memcpy(&event[pos], &packet[offset], data_length); 1223 pos += data_length; 1224 offset += data_length + 1u; // rssi 1225 hci_emit_event(event, pos, 1); 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_BLE 1232 #ifdef ENABLE_LE_PERIPHERAL 1233 static void hci_update_advertisements_enabled_for_current_roles(void){ 1234 if (hci_stack->le_advertisements_enabled){ 1235 // get number of active le slave connections 1236 int num_slave_connections = 0; 1237 btstack_linked_list_iterator_t it; 1238 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1239 while (btstack_linked_list_iterator_has_next(&it)){ 1240 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1241 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1242 if (con->state != OPEN) continue; 1243 if (con->role != HCI_ROLE_SLAVE) continue; 1244 if (!hci_is_le_connection(con)) continue; 1245 num_slave_connections++; 1246 } 1247 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1248 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1249 } else { 1250 hci_stack->le_advertisements_enabled_for_current_roles = false; 1251 } 1252 } 1253 #endif 1254 #endif 1255 1256 #ifdef ENABLE_CLASSIC 1257 static void gap_run_set_local_name(void){ 1258 hci_reserve_packet_buffer(); 1259 uint8_t * packet = hci_stack->hci_packet_buffer; 1260 // construct HCI Command and send 1261 uint16_t opcode = hci_write_local_name.opcode; 1262 hci_stack->last_cmd_opcode = opcode; 1263 packet[0] = opcode & 0xff; 1264 packet[1] = opcode >> 8; 1265 packet[2] = DEVICE_NAME_LEN; 1266 memset(&packet[3], 0, DEVICE_NAME_LEN); 1267 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1268 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1269 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1270 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1271 // expand '00:00:00:00:00:00' in name with bd_addr 1272 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1273 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1274 } 1275 1276 static void gap_run_set_eir_data(void){ 1277 hci_reserve_packet_buffer(); 1278 uint8_t * packet = hci_stack->hci_packet_buffer; 1279 // construct HCI Command in-place and send 1280 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1281 hci_stack->last_cmd_opcode = opcode; 1282 uint16_t offset = 0; 1283 packet[offset++] = opcode & 0xff; 1284 packet[offset++] = opcode >> 8; 1285 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1286 packet[offset++] = 0; // FEC not required 1287 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1288 if (hci_stack->eir_data){ 1289 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1290 ad_context_t context; 1291 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1292 uint8_t data_type = ad_iterator_get_data_type(&context); 1293 uint8_t size = ad_iterator_get_data_len(&context); 1294 const uint8_t *data = ad_iterator_get_data(&context); 1295 // copy item 1296 packet[offset++] = size + 1; 1297 packet[offset++] = data_type; 1298 memcpy(&packet[offset], data, size); 1299 // update name item 1300 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1301 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1302 } 1303 offset += size; 1304 } 1305 } else { 1306 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1307 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1308 packet[offset++] = bytes_to_copy + 1; 1309 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1310 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1311 // expand '00:00:00:00:00:00' in name with bd_addr 1312 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1313 } 1314 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1315 } 1316 1317 static void hci_run_gap_tasks_classic(void){ 1318 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1319 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1320 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1321 return; 1322 } 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1325 gap_run_set_local_name(); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1330 gap_run_set_eir_data(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1335 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1336 return; 1337 } 1338 // write page scan activity 1339 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1340 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1341 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1342 return; 1343 } 1344 // write page scan type 1345 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1346 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1347 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1348 return; 1349 } 1350 // send scan enable 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1353 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1354 return; 1355 } 1356 } 1357 #endif 1358 1359 #ifndef HAVE_HOST_CONTROLLER_API 1360 1361 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1362 if (!hci_stack->config) return 0; 1363 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1364 // Limit baud rate for Broadcom chipsets to 3 mbps 1365 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1366 baud_rate = 3000000; 1367 } 1368 return baud_rate; 1369 } 1370 1371 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1372 UNUSED(ds); 1373 1374 switch (hci_stack->substate){ 1375 case HCI_INIT_W4_SEND_RESET: 1376 log_info("Resend HCI Reset"); 1377 hci_stack->substate = HCI_INIT_SEND_RESET; 1378 hci_stack->num_cmd_packets = 1; 1379 hci_run(); 1380 break; 1381 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1382 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1383 if (hci_stack->hci_transport->reset_link){ 1384 hci_stack->hci_transport->reset_link(); 1385 } 1386 1387 /* fall through */ 1388 1389 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1390 log_info("Resend HCI Reset - CSR Warm Boot"); 1391 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1392 hci_stack->num_cmd_packets = 1; 1393 hci_run(); 1394 break; 1395 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1396 if (hci_stack->hci_transport->set_baudrate){ 1397 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1398 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1399 hci_stack->hci_transport->set_baudrate(baud_rate); 1400 } 1401 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1402 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1403 if (hci_stack->hci_transport->reset_link){ 1404 log_info("Link Reset"); 1405 hci_stack->hci_transport->reset_link(); 1406 } 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_run(); 1409 } 1410 break; 1411 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1412 // otherwise continue 1413 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1414 hci_send_cmd(&hci_read_local_supported_commands); 1415 break; 1416 default: 1417 break; 1418 } 1419 } 1420 #endif 1421 1422 static void hci_initializing_next_state(void){ 1423 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1424 } 1425 1426 static void hci_init_done(void){ 1427 // done. tell the app 1428 log_info("hci_init_done -> HCI_STATE_WORKING"); 1429 hci_stack->state = HCI_STATE_WORKING; 1430 hci_emit_state(); 1431 } 1432 1433 // assumption: hci_can_send_command_packet_now() == true 1434 static void hci_initializing_run(void){ 1435 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1436 1437 bool need_baud_change = false; 1438 1439 #ifndef HAVE_HOST_CONTROLLER_API 1440 need_baud_change = hci_stack->config 1441 && hci_stack->chipset 1442 && hci_stack->chipset->set_baudrate_command 1443 && hci_stack->hci_transport->set_baudrate 1444 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1445 #endif 1446 1447 switch (hci_stack->substate){ 1448 case HCI_INIT_SEND_RESET: 1449 hci_state_reset(); 1450 1451 #ifndef HAVE_HOST_CONTROLLER_API 1452 // prepare reset if command complete not received in 100ms 1453 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1454 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1455 btstack_run_loop_add_timer(&hci_stack->timeout); 1456 #endif 1457 // send command 1458 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1459 hci_send_cmd(&hci_reset); 1460 break; 1461 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1462 hci_send_cmd(&hci_read_local_version_information); 1463 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1464 break; 1465 case HCI_INIT_SEND_READ_LOCAL_NAME: 1466 hci_send_cmd(&hci_read_local_name); 1467 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1468 break; 1469 1470 #ifndef HAVE_HOST_CONTROLLER_API 1471 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1472 hci_state_reset(); 1473 // prepare reset if command complete not received in 100ms 1474 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1475 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1476 btstack_run_loop_add_timer(&hci_stack->timeout); 1477 // send command 1478 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1479 hci_send_cmd(&hci_reset); 1480 break; 1481 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1482 hci_state_reset(); 1483 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1484 hci_send_cmd(&hci_reset); 1485 break; 1486 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1487 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1488 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1489 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1490 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1491 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1492 break; 1493 } 1494 case HCI_INIT_SET_BD_ADDR: 1495 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1496 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1497 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1498 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1499 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1500 break; 1501 case HCI_INIT_SEND_BAUD_CHANGE: 1502 if (need_baud_change) { 1503 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1504 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1505 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1506 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1507 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1508 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1509 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1510 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1511 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1512 btstack_run_loop_add_timer(&hci_stack->timeout); 1513 } 1514 break; 1515 } 1516 1517 /* fall through */ 1518 1519 case HCI_INIT_CUSTOM_INIT: 1520 // Custom initialization 1521 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1522 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1523 bool send_cmd = false; 1524 switch (hci_stack->chipset_result){ 1525 case BTSTACK_CHIPSET_VALID_COMMAND: 1526 send_cmd = true; 1527 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1528 break; 1529 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1530 send_cmd = true; 1531 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1532 log_info("CSR Warm Boot"); 1533 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1534 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1535 btstack_run_loop_add_timer(&hci_stack->timeout); 1536 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1537 && hci_stack->config 1538 && hci_stack->chipset 1539 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1540 && hci_stack->hci_transport->set_baudrate 1541 && hci_transport_uart_get_main_baud_rate()){ 1542 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1543 } else { 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1545 } 1546 break; 1547 default: 1548 break; 1549 } 1550 1551 if (send_cmd){ 1552 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1553 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1554 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1555 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1556 break; 1557 } 1558 log_info("Init script done"); 1559 1560 // Init script download on Broadcom chipsets causes: 1561 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1562 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1563 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1564 1565 // - baud rate to reset, restore UART baud rate if needed 1566 if (need_baud_change) { 1567 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1568 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1569 hci_stack->hci_transport->set_baudrate(baud_rate); 1570 } 1571 1572 uint16_t bcm_delay_ms = 300; 1573 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1574 // -> Work around: wait here. 1575 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1576 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1577 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1578 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1579 btstack_run_loop_add_timer(&hci_stack->timeout); 1580 break; 1581 } 1582 } 1583 /* fall through */ 1584 #endif 1585 1586 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1587 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1588 hci_send_cmd(&hci_read_local_supported_commands); 1589 break; 1590 case HCI_INIT_READ_BD_ADDR: 1591 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1592 hci_send_cmd(&hci_read_bd_addr); 1593 break; 1594 case HCI_INIT_READ_BUFFER_SIZE: 1595 // only read buffer size if supported 1596 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1597 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1598 hci_send_cmd(&hci_read_buffer_size); 1599 break; 1600 } 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1605 hci_send_cmd(&hci_read_local_supported_features); 1606 break; 1607 1608 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1609 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1610 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1611 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1612 break; 1613 case HCI_INIT_HOST_BUFFER_SIZE: 1614 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1615 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1616 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1617 break; 1618 #endif 1619 1620 case HCI_INIT_SET_EVENT_MASK: 1621 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1622 if (hci_le_supported()){ 1623 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1624 } else { 1625 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1626 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1627 } 1628 break; 1629 1630 #ifdef ENABLE_CLASSIC 1631 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1632 if (hci_classic_supported() && gap_ssp_supported()){ 1633 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1634 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1635 break; 1636 } 1637 /* fall through */ 1638 1639 case HCI_INIT_WRITE_INQUIRY_MODE: 1640 if (hci_classic_supported()){ 1641 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1642 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1643 break; 1644 } 1645 /* fall through */ 1646 1647 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1648 // skip write secure connections host support if not supported or disabled 1649 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1650 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1651 hci_stack->secure_connections_active = true; 1652 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1653 break; 1654 } 1655 /* fall through */ 1656 1657 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1658 if (hci_classic_supported()){ 1659 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1660 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1661 break; 1662 } 1663 /* fall through */ 1664 1665 #ifdef ENABLE_SCO_OVER_HCI 1666 // only sent if ENABLE_SCO_OVER_HCI is defined 1667 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1668 // skip write synchronous flow control if not supported 1669 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1670 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1671 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1672 break; 1673 } 1674 /* fall through */ 1675 1676 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1677 // skip write default erroneous data reporting if not supported 1678 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1679 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1680 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1681 break; 1682 } 1683 /* fall through */ 1684 #endif 1685 1686 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1687 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1688 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1689 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1690 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1691 #ifdef ENABLE_SCO_OVER_HCI 1692 log_info("BCM: Route SCO data via HCI transport"); 1693 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1694 #endif 1695 #ifdef ENABLE_SCO_OVER_PCM 1696 log_info("BCM: Route SCO data via PCM interface"); 1697 #ifdef ENABLE_BCM_PCM_WBS 1698 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1699 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1700 #else 1701 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1702 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1703 #endif 1704 #endif 1705 break; 1706 } 1707 /* fall through */ 1708 #endif 1709 1710 #ifdef ENABLE_SCO_OVER_PCM 1711 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1712 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1713 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1714 log_info("BCM: Config PCM interface for I2S"); 1715 #ifdef ENABLE_BCM_PCM_WBS 1716 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1717 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1718 #else 1719 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1720 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1721 #endif 1722 break; 1723 } 1724 /* fall through */ 1725 #endif 1726 #endif 1727 1728 #ifdef ENABLE_BLE 1729 // LE INIT 1730 case HCI_INIT_LE_READ_BUFFER_SIZE: 1731 if (hci_le_supported()){ 1732 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1733 hci_send_cmd(&hci_le_read_buffer_size); 1734 break; 1735 } 1736 /* fall through */ 1737 1738 case HCI_INIT_LE_SET_EVENT_MASK: 1739 if (hci_le_supported()){ 1740 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1741 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1742 break; 1743 } 1744 /* fall through */ 1745 1746 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1747 if (hci_le_supported()){ 1748 // LE Supported Host = 1, Simultaneous Host = 0 1749 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1750 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1751 break; 1752 } 1753 /* fall through */ 1754 1755 #endif 1756 1757 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1758 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1759 if (hci_le_supported()){ 1760 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1761 hci_send_cmd(&hci_le_read_maximum_data_length); 1762 break; 1763 } 1764 /* fall through */ 1765 1766 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1767 if (hci_le_supported()){ 1768 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1769 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1770 break; 1771 } 1772 /* fall through */ 1773 #endif 1774 1775 #ifdef ENABLE_LE_CENTRAL 1776 case HCI_INIT_READ_WHITE_LIST_SIZE: 1777 if (hci_le_supported()){ 1778 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1779 hci_send_cmd(&hci_le_read_white_list_size); 1780 break; 1781 } 1782 /* fall through */ 1783 1784 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1785 if (hci_le_supported()){ 1786 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1787 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); 1788 break; 1789 } 1790 /* fall through */ 1791 #endif 1792 1793 case HCI_INIT_DONE: 1794 hci_stack->substate = HCI_INIT_DONE; 1795 #ifdef ENABLE_CLASSIC 1796 // init sequence complete, check if GAP Tasks are completed 1797 if (hci_stack->gap_tasks != 0) { 1798 hci_run_gap_tasks_classic(); 1799 break; 1800 } 1801 #endif 1802 hci_init_done(); 1803 break; 1804 1805 default: 1806 return; 1807 } 1808 } 1809 1810 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1811 bool command_completed = false; 1812 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1813 uint16_t opcode = little_endian_read_16(packet,3); 1814 if (opcode == hci_stack->last_cmd_opcode){ 1815 command_completed = true; 1816 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1817 } else { 1818 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1819 } 1820 } 1821 1822 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1823 uint8_t status = packet[2]; 1824 uint16_t opcode = little_endian_read_16(packet,4); 1825 if (opcode == hci_stack->last_cmd_opcode){ 1826 if (status){ 1827 command_completed = true; 1828 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1829 } else { 1830 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1831 } 1832 } else { 1833 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1834 } 1835 } 1836 #ifndef HAVE_HOST_CONTROLLER_API 1837 // Vendor == CSR 1838 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1839 // TODO: track actual command 1840 command_completed = true; 1841 } 1842 1843 // Vendor == Toshiba 1844 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1845 // TODO: track actual command 1846 command_completed = true; 1847 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1848 hci_stack->num_cmd_packets = 1; 1849 } 1850 #endif 1851 1852 return command_completed; 1853 } 1854 1855 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1856 1857 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1858 1859 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1860 1861 #ifndef HAVE_HOST_CONTROLLER_API 1862 1863 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1864 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1865 // 1866 // HCI Reset 1867 // Timeout 100 ms 1868 // HCI Reset 1869 // Command Complete Reset 1870 // HCI Read Local Version Information 1871 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1872 // hang... 1873 // 1874 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1875 if (!command_completed 1876 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1877 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1878 1879 uint16_t opcode = little_endian_read_16(packet,3); 1880 if (opcode == hci_reset.opcode){ 1881 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1882 return; 1883 } 1884 } 1885 1886 // CSR & H5 1887 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1888 if (!command_completed 1889 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1890 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1891 1892 uint16_t opcode = little_endian_read_16(packet,3); 1893 if (opcode == hci_reset.opcode){ 1894 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1895 return; 1896 } 1897 } 1898 1899 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1900 // fix: Correct substate and behave as command below 1901 if (command_completed){ 1902 switch (hci_stack->substate){ 1903 case HCI_INIT_SEND_RESET: 1904 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1905 break; 1906 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1907 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1908 break; 1909 default: 1910 break; 1911 } 1912 } 1913 1914 #endif 1915 1916 if (!command_completed) return; 1917 1918 bool need_baud_change = false; 1919 bool need_addr_change = false; 1920 1921 #ifndef HAVE_HOST_CONTROLLER_API 1922 need_baud_change = hci_stack->config 1923 && hci_stack->chipset 1924 && hci_stack->chipset->set_baudrate_command 1925 && hci_stack->hci_transport->set_baudrate 1926 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1927 1928 need_addr_change = hci_stack->custom_bd_addr_set 1929 && hci_stack->chipset 1930 && hci_stack->chipset->set_bd_addr_command; 1931 #endif 1932 1933 switch(hci_stack->substate){ 1934 1935 #ifndef HAVE_HOST_CONTROLLER_API 1936 case HCI_INIT_SEND_RESET: 1937 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1938 // fix: just correct substate and behave as command below 1939 1940 /* fall through */ 1941 #endif 1942 1943 case HCI_INIT_W4_SEND_RESET: 1944 btstack_run_loop_remove_timer(&hci_stack->timeout); 1945 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1946 return; 1947 1948 #ifndef HAVE_HOST_CONTROLLER_API 1949 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1950 // for STLC2500D, baud rate change already happened. 1951 // for others, baud rate gets changed now 1952 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1953 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1954 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1955 hci_stack->hci_transport->set_baudrate(baud_rate); 1956 } 1957 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1958 return; 1959 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1960 btstack_run_loop_remove_timer(&hci_stack->timeout); 1961 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1962 return; 1963 case HCI_INIT_W4_CUSTOM_INIT: 1964 // repeat custom init 1965 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1966 return; 1967 #endif 1968 1969 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1970 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1971 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1972 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1973 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1974 return; 1975 } 1976 if (need_addr_change){ 1977 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1978 return; 1979 } 1980 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1981 return; 1982 #ifndef HAVE_HOST_CONTROLLER_API 1983 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1984 if (need_baud_change){ 1985 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1986 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1987 hci_stack->hci_transport->set_baudrate(baud_rate); 1988 } 1989 if (need_addr_change){ 1990 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1991 return; 1992 } 1993 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1994 return; 1995 case HCI_INIT_W4_SET_BD_ADDR: 1996 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1997 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1998 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1999 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2000 return; 2001 } 2002 // skipping st warm boot 2003 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2004 return; 2005 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2006 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2007 return; 2008 #endif 2009 2010 #ifdef ENABLE_BLE 2011 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 2012 // skip write le host if not supported (e.g. on LE only EM9301) 2013 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 2014 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2015 return; 2016 2017 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2018 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 2019 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 2020 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 2021 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 2022 return; 2023 } 2024 // explicit fall through to reduce repetitions 2025 2026 #ifdef ENABLE_LE_CENTRAL 2027 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 2028 #else 2029 hci_stack->substate = HCI_INIT_DONE; 2030 #endif 2031 return; 2032 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 2033 2034 #endif /* ENABLE_BLE */ 2035 2036 case HCI_INIT_DONE: 2037 // set state if we came here by fall through 2038 hci_stack->substate = HCI_INIT_DONE; 2039 return; 2040 2041 default: 2042 break; 2043 } 2044 hci_initializing_next_state(); 2045 } 2046 2047 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2048 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2049 bd_addr_t bd_address; 2050 (void)memcpy(&bd_address, conn->address, 6); 2051 2052 #ifdef ENABLE_CLASSIC 2053 // cache needed data 2054 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2055 #endif 2056 2057 // connection failed, remove entry 2058 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2059 btstack_memory_hci_connection_free( conn ); 2060 2061 #ifdef ENABLE_CLASSIC 2062 // notify client if dedicated bonding 2063 if (notify_dedicated_bonding_failed){ 2064 log_info("hci notify_dedicated_bonding_failed"); 2065 hci_emit_dedicated_bonding_result(bd_address, status); 2066 } 2067 2068 // if authentication error, also delete link key 2069 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2070 gap_drop_link_key_for_bd_addr(bd_address); 2071 } 2072 #else 2073 UNUSED(status); 2074 #endif 2075 } 2076 2077 #ifdef ENABLE_CLASSIC 2078 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2079 // SSP Controller 2080 if (features[6] & (1 << 3)){ 2081 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2082 } 2083 // eSCO 2084 if (features[3] & (1<<7)){ 2085 conn->remote_supported_features[0] |= 1; 2086 } 2087 // Extended features 2088 if (features[7] & (1<<7)){ 2089 conn->remote_supported_features[0] |= 2; 2090 } 2091 } 2092 2093 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2094 // SSP Host 2095 if (features[0] & (1 << 0)){ 2096 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2097 } 2098 // SC Host 2099 if (features[0] & (1 << 3)){ 2100 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2101 } 2102 } 2103 2104 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2105 // SC Controller 2106 if (features[1] & (1 << 0)){ 2107 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2108 } 2109 } 2110 2111 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2112 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2113 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2114 if (conn->bonding_flags & BONDING_DEDICATED){ 2115 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2116 } 2117 } 2118 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2119 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2120 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2121 } 2122 2123 #endif 2124 2125 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2126 // handle BT initialization 2127 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2128 hci_initializing_event_handler(packet, size); 2129 } 2130 2131 // help with BT sleep 2132 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2133 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2134 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2135 hci_initializing_next_state(); 2136 } 2137 } 2138 2139 #ifdef ENABLE_CLASSIC 2140 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2141 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2142 conn->encryption_key_size = encryption_key_size; 2143 2144 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2145 conn->requested_security_level = LEVEL_0; 2146 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2147 return; 2148 } 2149 2150 // Request Authentication if not already done 2151 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2152 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2153 } 2154 #endif 2155 2156 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2157 UNUSED(size); 2158 2159 uint16_t manufacturer; 2160 #ifdef ENABLE_CLASSIC 2161 hci_con_handle_t handle; 2162 hci_connection_t * conn; 2163 uint8_t status; 2164 #endif 2165 // get num cmd packets - limit to 1 to reduce complexity 2166 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2167 2168 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2169 switch (opcode){ 2170 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2171 if (packet[5]) break; 2172 // terminate, name 248 chars 2173 packet[6+248] = 0; 2174 log_info("local name: %s", &packet[6]); 2175 break; 2176 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2177 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2178 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2179 uint16_t acl_len = little_endian_read_16(packet, 6); 2180 uint16_t sco_len = packet[8]; 2181 2182 // determine usable ACL/SCO payload size 2183 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2184 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2185 2186 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2187 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2188 2189 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2190 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2191 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2192 } 2193 break; 2194 case HCI_OPCODE_HCI_READ_RSSI: 2195 if (packet[5] == ERROR_CODE_SUCCESS){ 2196 uint8_t event[5]; 2197 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2198 event[1] = 3; 2199 (void)memcpy(&event[2], &packet[6], 3); 2200 hci_emit_event(event, sizeof(event), 1); 2201 } 2202 break; 2203 #ifdef ENABLE_BLE 2204 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2205 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2206 hci_stack->le_acl_packets_total_num = packet[8]; 2207 // determine usable ACL payload size 2208 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2209 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2210 } 2211 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2212 break; 2213 #endif 2214 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2215 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2216 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2217 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2218 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); 2219 break; 2220 #endif 2221 #ifdef ENABLE_LE_CENTRAL 2222 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2223 hci_stack->le_whitelist_capacity = packet[6]; 2224 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2225 break; 2226 #endif 2227 case HCI_OPCODE_HCI_READ_BD_ADDR: 2228 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2229 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)); 2230 #ifdef ENABLE_CLASSIC 2231 if (hci_stack->link_key_db){ 2232 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2233 } 2234 #endif 2235 break; 2236 #ifdef ENABLE_CLASSIC 2237 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2238 hci_emit_discoverable_enabled(hci_stack->discoverable); 2239 break; 2240 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2241 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2242 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2243 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2244 hci_emit_event(event, sizeof(event), 1); 2245 } 2246 break; 2247 #endif 2248 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2249 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2250 2251 #ifdef ENABLE_CLASSIC 2252 // determine usable ACL packet types based on host buffer size and supported features 2253 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2254 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2255 #endif 2256 // Classic/LE 2257 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2258 break; 2259 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2260 manufacturer = little_endian_read_16(packet, 10); 2261 // map Cypress to Broadcom 2262 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2263 log_info("Treat Cypress as Broadcom"); 2264 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2265 little_endian_store_16(packet, 10, manufacturer); 2266 } 2267 hci_stack->manufacturer = manufacturer; 2268 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2269 break; 2270 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2271 hci_stack->local_supported_commands[0] = 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2280 hci_stack->local_supported_commands[1] = 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2283 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2284 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2285 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2286 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2287 break; 2288 #ifdef ENABLE_CLASSIC 2289 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2290 if (packet[5]) return; 2291 hci_stack->synchronous_flow_control_enabled = 1; 2292 break; 2293 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2294 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2295 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2296 conn = hci_connection_for_handle(handle); 2297 if (conn != NULL) { 2298 uint8_t key_size = 0; 2299 if (status == 0){ 2300 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2301 log_info("Handle %04x key Size: %u", handle, key_size); 2302 } else { 2303 key_size = 1; 2304 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2305 } 2306 hci_handle_read_encryption_key_size_complete(conn, key_size); 2307 } 2308 break; 2309 // assert pairing complete event is emitted. 2310 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2311 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2312 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2313 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2314 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2315 // lookup connection by gap pairing addr 2316 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2317 if (conn == NULL) break; 2318 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2319 break; 2320 2321 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2322 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2323 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2324 uint8_t event[67]; 2325 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2326 event[1] = 65; 2327 (void)memset(&event[2], 0, 65); 2328 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2329 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2330 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2331 event[2] = 3; 2332 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2333 } else { 2334 event[2] = 1; 2335 } 2336 } 2337 hci_emit_event(event, sizeof(event), 0); 2338 break; 2339 } 2340 2341 // note: only needed if user does not provide OOB data 2342 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2343 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2344 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2345 if (conn == NULL) break; 2346 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2347 break; 2348 #endif 2349 #endif 2350 default: 2351 break; 2352 } 2353 } 2354 2355 #ifdef ENABLE_BLE 2356 static void event_handle_le_connection_complete(const uint8_t * packet){ 2357 bd_addr_t addr; 2358 bd_addr_type_t addr_type; 2359 hci_connection_t * conn; 2360 2361 // Connection management 2362 reverse_bd_addr(&packet[8], addr); 2363 addr_type = (bd_addr_type_t)packet[7]; 2364 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2365 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2366 2367 #ifdef ENABLE_LE_CENTRAL 2368 // handle error: error is reported only to the initiator -> outgoing connection 2369 if (packet[3]){ 2370 2371 // handle cancelled outgoing connection 2372 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2373 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2374 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2375 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2376 // reset state 2377 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2378 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2379 // get outgoing connection conn struct for direct connect 2380 conn = gap_get_outgoing_connection(); 2381 } 2382 2383 // outgoing le connection establishment is done 2384 if (conn){ 2385 // remove entry 2386 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2387 btstack_memory_hci_connection_free( conn ); 2388 } 2389 return; 2390 } 2391 #endif 2392 2393 // on success, both hosts receive connection complete event 2394 if (packet[6] == HCI_ROLE_MASTER){ 2395 #ifdef ENABLE_LE_CENTRAL 2396 // if we're master on an le connection, it was an outgoing connection and we're done with it 2397 // note: no hci_connection_t object exists yet for connect with whitelist 2398 if (hci_is_le_connection_type(addr_type)){ 2399 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2400 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2401 } 2402 #endif 2403 } else { 2404 #ifdef ENABLE_LE_PERIPHERAL 2405 // if we're slave, it was an incoming connection, advertisements have stopped 2406 hci_stack->le_advertisements_active = false; 2407 #endif 2408 } 2409 2410 // LE connections are auto-accepted, so just create a connection if there isn't one already 2411 if (!conn){ 2412 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2413 } 2414 2415 // no memory, sorry. 2416 if (!conn){ 2417 return; 2418 } 2419 2420 conn->state = OPEN; 2421 conn->role = packet[6]; 2422 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2423 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2424 2425 #ifdef ENABLE_LE_PERIPHERAL 2426 if (packet[6] == HCI_ROLE_SLAVE){ 2427 hci_update_advertisements_enabled_for_current_roles(); 2428 } 2429 #endif 2430 2431 // init unenhanced att bearer mtu 2432 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2433 conn->att_connection.mtu_exchanged = false; 2434 2435 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2436 2437 // restart timer 2438 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2439 // btstack_run_loop_add_timer(&conn->timeout); 2440 2441 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2442 2443 hci_emit_nr_connections_changed(); 2444 } 2445 #endif 2446 2447 #ifdef ENABLE_CLASSIC 2448 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){ 2449 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2450 // LEVEL_4 is tested by l2cap 2451 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2452 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2453 if (level >= LEVEL_3){ 2454 // MITM not possible without keyboard or display 2455 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2456 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2457 2458 // MITM possible if one side has keyboard and the other has keyboard or display 2459 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2460 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2461 2462 // MITM not possible if one side has only display and other side has no keyboard 2463 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2464 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2465 } 2466 // LEVEL 2 requires SSP, which is a given 2467 return true; 2468 } 2469 2470 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2471 uint16_t i; 2472 for (i=0; i < size ; i++){ 2473 if (data[i] != 0) { 2474 return false; 2475 } 2476 } 2477 return true; 2478 } 2479 2480 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2481 // get requested security level 2482 gap_security_level_t requested_security_level = conn->requested_security_level; 2483 if (hci_stack->gap_secure_connections_only_mode){ 2484 requested_security_level = LEVEL_4; 2485 } 2486 2487 // assess security: LEVEL 4 requires SC 2488 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2489 if ((requested_security_level == LEVEL_4) && 2490 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2491 !hci_remote_sc_enabled(conn)){ 2492 log_info("Level 4 required, but SC not supported -> abort"); 2493 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2494 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2495 return; 2496 } 2497 2498 // assess security based on io capabilities 2499 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2500 // responder: fully validate io caps of both sides as well as OOB data 2501 bool security_possible = false; 2502 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2503 2504 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2505 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2506 // so we merge the OOB data availability 2507 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2508 if (conn->classic_oob_c_192 != NULL){ 2509 have_oob_data |= 1; 2510 } 2511 if (conn->classic_oob_c_256 != NULL){ 2512 have_oob_data |= 2; 2513 } 2514 // for up to Level 3, either P-192 as well as P-256 will do 2515 // 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 2516 // if remote does not SC, we should not receive P-256 data either 2517 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2518 security_possible = true; 2519 } 2520 // for Level 4, P-256 is needed 2521 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2522 security_possible = true; 2523 } 2524 #endif 2525 2526 if (security_possible == false){ 2527 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2528 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2529 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2530 return; 2531 } 2532 } else { 2533 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2534 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2535 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2536 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2537 log_info("Level 3+ required, but no input/output -> abort"); 2538 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2539 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2540 return; 2541 } 2542 #endif 2543 #endif 2544 } 2545 2546 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2547 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2548 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2549 } else { 2550 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2551 } 2552 #endif 2553 } 2554 2555 #endif 2556 2557 static void event_handler(uint8_t *packet, uint16_t size){ 2558 2559 uint16_t event_length = packet[1]; 2560 2561 // assert packet is complete 2562 if (size != (event_length + 2u)){ 2563 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2564 return; 2565 } 2566 2567 bd_addr_type_t addr_type; 2568 hci_con_handle_t handle; 2569 hci_connection_t * conn; 2570 int i; 2571 int create_connection_cmd; 2572 2573 #ifdef ENABLE_CLASSIC 2574 hci_link_type_t link_type; 2575 bd_addr_t addr; 2576 #endif 2577 2578 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2579 2580 switch (hci_event_packet_get_type(packet)) { 2581 2582 case HCI_EVENT_COMMAND_COMPLETE: 2583 handle_command_complete_event(packet, size); 2584 break; 2585 2586 case HCI_EVENT_COMMAND_STATUS: 2587 // get num cmd packets - limit to 1 to reduce complexity 2588 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2589 2590 // check command status to detected failed outgoing connections 2591 create_connection_cmd = 0; 2592 #ifdef ENABLE_CLASSIC 2593 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2594 create_connection_cmd = 1; 2595 } 2596 #endif 2597 #ifdef ENABLE_LE_CENTRAL 2598 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2599 create_connection_cmd = 1; 2600 } 2601 #endif 2602 if (create_connection_cmd) { 2603 uint8_t status = hci_event_command_status_get_status(packet); 2604 addr_type = hci_stack->outgoing_addr_type; 2605 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2606 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); 2607 2608 // reset outgoing address info 2609 memset(hci_stack->outgoing_addr, 0, 6); 2610 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2611 2612 // on error 2613 if (status != ERROR_CODE_SUCCESS){ 2614 #ifdef ENABLE_LE_CENTRAL 2615 if (hci_is_le_connection_type(addr_type)){ 2616 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2617 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2618 } 2619 #endif 2620 // error => outgoing connection failed 2621 if (conn != NULL){ 2622 hci_handle_connection_failed(conn, status); 2623 } 2624 } 2625 } 2626 2627 #ifdef ENABLE_CLASSIC 2628 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2629 uint8_t status = hci_event_command_status_get_status(packet); 2630 log_info("command status (inquiry), status %x", status); 2631 if (status == ERROR_CODE_SUCCESS) { 2632 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2633 } else { 2634 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2635 } 2636 } 2637 #endif 2638 break; 2639 2640 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2641 if (size < 3) return; 2642 uint16_t num_handles = packet[2]; 2643 if (size != (3u + num_handles * 4u)) return; 2644 uint16_t offset = 3; 2645 for (i=0; i<num_handles;i++){ 2646 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2647 offset += 2u; 2648 uint16_t num_packets = little_endian_read_16(packet, offset); 2649 offset += 2u; 2650 2651 conn = hci_connection_for_handle(handle); 2652 if (!conn){ 2653 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2654 continue; 2655 } 2656 2657 if (conn->num_packets_sent >= num_packets){ 2658 conn->num_packets_sent -= num_packets; 2659 } else { 2660 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2661 conn->num_packets_sent = 0; 2662 } 2663 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2664 2665 #ifdef ENABLE_CLASSIC 2666 // For SCO, we do the can_send_now_check here 2667 hci_notify_if_sco_can_send_now(); 2668 #endif 2669 } 2670 break; 2671 } 2672 2673 #ifdef ENABLE_CLASSIC 2674 case HCI_EVENT_INQUIRY_COMPLETE: 2675 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2676 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2677 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2678 hci_emit_event(event, sizeof(event), 1); 2679 } 2680 break; 2681 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2682 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2683 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2684 } 2685 break; 2686 case HCI_EVENT_CONNECTION_REQUEST: 2687 reverse_bd_addr(&packet[2], addr); 2688 link_type = (hci_link_type_t) packet[11]; 2689 2690 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2691 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2692 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2693 bd_addr_copy(hci_stack->decline_addr, addr); 2694 break; 2695 } 2696 2697 if (hci_stack->gap_classic_accept_callback != NULL){ 2698 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2699 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2700 bd_addr_copy(hci_stack->decline_addr, addr); 2701 break; 2702 } 2703 } 2704 2705 // TODO: eval COD 8-10 2706 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2707 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2708 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2709 if (!conn) { 2710 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2711 } 2712 if (!conn) { 2713 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2714 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2715 bd_addr_copy(hci_stack->decline_addr, addr); 2716 break; 2717 } 2718 conn->role = HCI_ROLE_SLAVE; 2719 conn->state = RECEIVED_CONNECTION_REQUEST; 2720 // store info about eSCO 2721 if (link_type == HCI_LINK_TYPE_ESCO){ 2722 conn->remote_supported_features[0] |= 1; 2723 } 2724 hci_run(); 2725 break; 2726 2727 case HCI_EVENT_CONNECTION_COMPLETE: 2728 // Connection management 2729 reverse_bd_addr(&packet[5], addr); 2730 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2731 addr_type = BD_ADDR_TYPE_ACL; 2732 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2733 if (conn) { 2734 if (!packet[2]){ 2735 conn->state = OPEN; 2736 conn->con_handle = little_endian_read_16(packet, 3); 2737 2738 // queue get remote feature 2739 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2740 2741 // queue set supervision timeout if we're master 2742 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2743 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2744 } 2745 2746 // restart timer 2747 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2748 btstack_run_loop_add_timer(&conn->timeout); 2749 2750 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2751 2752 hci_emit_nr_connections_changed(); 2753 } else { 2754 // connection failed 2755 hci_handle_connection_failed(conn, packet[2]); 2756 } 2757 } 2758 break; 2759 2760 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2761 reverse_bd_addr(&packet[5], addr); 2762 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2763 if (packet[2]){ 2764 // connection failed 2765 break; 2766 } 2767 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2768 if (!conn) { 2769 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2770 } 2771 if (!conn) { 2772 break; 2773 } 2774 conn->state = OPEN; 2775 conn->con_handle = little_endian_read_16(packet, 3); 2776 2777 #ifdef ENABLE_SCO_OVER_HCI 2778 // update SCO 2779 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2780 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2781 } 2782 // trigger can send now 2783 if (hci_have_usb_transport()){ 2784 hci_stack->sco_can_send_now = true; 2785 } 2786 #endif 2787 #ifdef HAVE_SCO_TRANSPORT 2788 // configure sco transport 2789 if (hci_stack->sco_transport != NULL){ 2790 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2791 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2792 } 2793 #endif 2794 break; 2795 2796 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2797 handle = little_endian_read_16(packet, 3); 2798 conn = hci_connection_for_handle(handle); 2799 if (!conn) break; 2800 if (!packet[2]){ 2801 const uint8_t * features = &packet[5]; 2802 hci_handle_remote_features_page_0(conn, features); 2803 2804 // read extended features if possible 2805 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2806 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2807 break; 2808 } 2809 } 2810 hci_handle_remote_features_received(conn); 2811 break; 2812 2813 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2814 handle = little_endian_read_16(packet, 3); 2815 conn = hci_connection_for_handle(handle); 2816 if (!conn) break; 2817 // status = ok, page = 1 2818 if (!packet[2]) { 2819 uint8_t page_number = packet[5]; 2820 uint8_t maximum_page_number = packet[6]; 2821 const uint8_t * features = &packet[7]; 2822 bool done = false; 2823 switch (page_number){ 2824 case 1: 2825 hci_handle_remote_features_page_1(conn, features); 2826 if (maximum_page_number >= 2){ 2827 // get Secure Connections (Controller) from Page 2 if available 2828 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2829 } else { 2830 // otherwise, assume SC (Controller) == SC (Host) 2831 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2832 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2833 } 2834 done = true; 2835 } 2836 break; 2837 case 2: 2838 hci_handle_remote_features_page_2(conn, features); 2839 done = true; 2840 break; 2841 default: 2842 break; 2843 } 2844 if (!done) break; 2845 } 2846 hci_handle_remote_features_received(conn); 2847 break; 2848 2849 case HCI_EVENT_LINK_KEY_REQUEST: 2850 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2851 hci_event_link_key_request_get_bd_addr(packet, addr); 2852 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2853 if (!conn) break; 2854 2855 // lookup link key in db if not cached 2856 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2857 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2858 } 2859 2860 // response sent by hci_run() 2861 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2862 #endif 2863 break; 2864 2865 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2866 hci_event_link_key_request_get_bd_addr(packet, addr); 2867 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2868 if (!conn) break; 2869 2870 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2871 2872 // CVE-2020-26555: ignore NULL link key 2873 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2874 if (btstack_is_null(&packet[8], 16)) break; 2875 2876 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2877 // Change Connection Encryption keeps link key type 2878 if (link_key_type != CHANGED_COMBINATION_KEY){ 2879 conn->link_key_type = link_key_type; 2880 } 2881 2882 // cache link key. link keys stored in little-endian format for legacy reasons 2883 memcpy(&conn->link_key, &packet[8], 16); 2884 2885 // only store link key: 2886 // - if bondable enabled 2887 if (hci_stack->bondable == false) break; 2888 // - if security level sufficient 2889 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2890 // - for SSP, also check if remote side requested bonding as well 2891 if (conn->link_key_type != COMBINATION_KEY){ 2892 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2893 if (!remote_bonding){ 2894 break; 2895 } 2896 } 2897 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2898 break; 2899 } 2900 2901 case HCI_EVENT_PIN_CODE_REQUEST: 2902 hci_event_pin_code_request_get_bd_addr(packet, addr); 2903 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2904 if (!conn) break; 2905 2906 hci_pairing_started(conn, false); 2907 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2908 if (!hci_stack->bondable ){ 2909 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2910 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2911 hci_run(); 2912 return; 2913 } 2914 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2915 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2916 log_info("Level 4 required, but SC not supported -> abort"); 2917 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2918 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2919 hci_run(); 2920 return; 2921 } 2922 break; 2923 2924 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2925 hci_event_io_capability_response_get_bd_addr(packet, addr); 2926 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2927 if (!conn) break; 2928 2929 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2930 hci_pairing_started(conn, true); 2931 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2932 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2933 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2934 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2935 #endif 2936 break; 2937 2938 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2939 hci_event_io_capability_response_get_bd_addr(packet, addr); 2940 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2941 if (!conn) break; 2942 2943 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2944 hci_connection_timestamp(conn); 2945 hci_pairing_started(conn, true); 2946 break; 2947 2948 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2949 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2950 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2951 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2952 if (!conn) break; 2953 2954 hci_connection_timestamp(conn); 2955 2956 hci_pairing_started(conn, true); 2957 2958 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2959 break; 2960 #endif 2961 2962 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2963 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2964 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2965 if (!conn) break; 2966 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2967 if (hci_stack->ssp_auto_accept){ 2968 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2969 }; 2970 } else { 2971 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2972 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2973 // don't forward event to app 2974 hci_run(); 2975 return; 2976 } 2977 break; 2978 2979 case HCI_EVENT_USER_PASSKEY_REQUEST: 2980 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2981 if (hci_stack->ssp_auto_accept){ 2982 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2983 }; 2984 break; 2985 2986 case HCI_EVENT_MODE_CHANGE: 2987 handle = hci_event_mode_change_get_handle(packet); 2988 conn = hci_connection_for_handle(handle); 2989 if (!conn) break; 2990 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2991 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2992 break; 2993 #endif 2994 2995 case HCI_EVENT_ENCRYPTION_CHANGE: 2996 handle = hci_event_encryption_change_get_connection_handle(packet); 2997 conn = hci_connection_for_handle(handle); 2998 if (!conn) break; 2999 if (hci_event_encryption_change_get_status(packet) == 0u) { 3000 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3001 if (encryption_enabled){ 3002 if (hci_is_le_connection(conn)){ 3003 // For LE, we accept connection as encrypted 3004 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3005 } 3006 #ifdef ENABLE_CLASSIC 3007 else { 3008 3009 // dedicated bonding: send result and disconnect 3010 if (conn->bonding_flags & BONDING_DEDICATED){ 3011 conn->bonding_flags &= ~BONDING_DEDICATED; 3012 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3013 conn->bonding_status = packet[2]; 3014 break; 3015 } 3016 3017 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3018 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3019 bool connected_uses_aes_ccm = encryption_enabled == 2; 3020 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3021 log_info("SC during pairing, but only E0 now -> abort"); 3022 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3023 break; 3024 } 3025 3026 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3027 if (connected_uses_aes_ccm){ 3028 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3029 } 3030 3031 #ifdef ENABLE_TESTING_SUPPORT 3032 // work around for issue with PTS dongle 3033 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3034 #endif 3035 3036 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3037 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3038 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3039 } else { 3040 // if not, pretend everything is perfect 3041 hci_handle_read_encryption_key_size_complete(conn, 16); 3042 } 3043 } 3044 #endif 3045 } else { 3046 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3047 } 3048 } 3049 3050 break; 3051 3052 #ifdef ENABLE_CLASSIC 3053 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3054 handle = hci_event_authentication_complete_get_connection_handle(packet); 3055 conn = hci_connection_for_handle(handle); 3056 if (!conn) break; 3057 3058 // clear authentication active flag 3059 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3060 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3061 3062 // authenticated only if auth status == 0 3063 if (hci_event_authentication_complete_get_status(packet) == 0){ 3064 // authenticated 3065 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3066 3067 // If not already encrypted, start encryption 3068 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3069 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3070 break; 3071 } 3072 } 3073 3074 // emit updated security level 3075 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3076 break; 3077 3078 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3079 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3080 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3081 if (!conn) break; 3082 3083 // treat successfully paired connection as authenticated 3084 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3085 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3086 } 3087 3088 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3089 break; 3090 #endif 3091 3092 // HCI_EVENT_DISCONNECTION_COMPLETE 3093 // has been split, to first notify stack before shutting connection down 3094 // see end of function, too. 3095 case HCI_EVENT_DISCONNECTION_COMPLETE: 3096 if (packet[2]) break; // status != 0 3097 handle = little_endian_read_16(packet, 3); 3098 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3099 if (hci_stack->acl_fragmentation_total_size > 0u) { 3100 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3101 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3102 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3103 hci_stack->acl_fragmentation_total_size = 0; 3104 hci_stack->acl_fragmentation_pos = 0; 3105 if (release_buffer){ 3106 hci_release_packet_buffer(); 3107 } 3108 } 3109 } 3110 3111 conn = hci_connection_for_handle(handle); 3112 if (!conn) break; 3113 #ifdef ENABLE_CLASSIC 3114 // pairing failed if it was ongoing 3115 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3116 #endif 3117 3118 // emit dedicatd bonding event 3119 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3120 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3121 } 3122 3123 // mark connection for shutdown, stop timers, reset state 3124 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3125 hci_connection_stop_timer(conn); 3126 hci_connection_init(conn); 3127 3128 #ifdef ENABLE_BLE 3129 #ifdef ENABLE_LE_PERIPHERAL 3130 // re-enable advertisements for le connections if active 3131 if (hci_is_le_connection(conn)){ 3132 hci_update_advertisements_enabled_for_current_roles(); 3133 } 3134 #endif 3135 #endif 3136 break; 3137 3138 case HCI_EVENT_HARDWARE_ERROR: 3139 log_error("Hardware Error: 0x%02x", packet[2]); 3140 if (hci_stack->hardware_error_callback){ 3141 (*hci_stack->hardware_error_callback)(packet[2]); 3142 } else { 3143 // if no special requests, just reboot stack 3144 hci_power_control_off(); 3145 hci_power_control_on(); 3146 } 3147 break; 3148 3149 #ifdef ENABLE_CLASSIC 3150 case HCI_EVENT_ROLE_CHANGE: 3151 if (packet[2]) break; // status != 0 3152 reverse_bd_addr(&packet[3], addr); 3153 addr_type = BD_ADDR_TYPE_ACL; 3154 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3155 if (!conn) break; 3156 conn->role = packet[9]; 3157 break; 3158 #endif 3159 3160 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3161 // release packet buffer only for asynchronous transport and if there are not further fragements 3162 if (hci_transport_synchronous()) { 3163 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3164 return; // instead of break: to avoid re-entering hci_run() 3165 } 3166 hci_stack->acl_fragmentation_tx_active = 0; 3167 if (hci_stack->acl_fragmentation_total_size) break; 3168 hci_release_packet_buffer(); 3169 3170 // L2CAP receives this event via the hci_emit_event below 3171 3172 #ifdef ENABLE_CLASSIC 3173 // For SCO, we do the can_send_now_check here 3174 hci_notify_if_sco_can_send_now(); 3175 #endif 3176 break; 3177 3178 #ifdef ENABLE_CLASSIC 3179 case HCI_EVENT_SCO_CAN_SEND_NOW: 3180 // For SCO, we do the can_send_now_check here 3181 hci_stack->sco_can_send_now = true; 3182 hci_notify_if_sco_can_send_now(); 3183 return; 3184 3185 // explode inquriy results for easier consumption 3186 case HCI_EVENT_INQUIRY_RESULT: 3187 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3188 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3189 gap_inquiry_explode(packet, size); 3190 break; 3191 #endif 3192 3193 #ifdef ENABLE_BLE 3194 case HCI_EVENT_LE_META: 3195 switch (packet[2]){ 3196 #ifdef ENABLE_LE_CENTRAL 3197 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3198 // log_info("advertising report received"); 3199 if (!hci_stack->le_scanning_enabled) break; 3200 le_handle_advertisement_report(packet, size); 3201 break; 3202 #endif 3203 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3204 event_handle_le_connection_complete(packet); 3205 break; 3206 3207 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3208 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3209 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3210 conn = hci_connection_for_handle(handle); 3211 if (!conn) break; 3212 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3213 break; 3214 3215 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3216 // connection 3217 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3218 conn = hci_connection_for_handle(handle); 3219 if (conn) { 3220 // read arguments 3221 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3222 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3223 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3224 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3225 3226 // validate against current connection parameter range 3227 le_connection_parameter_range_t existing_range; 3228 gap_get_connection_parameter_range(&existing_range); 3229 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3230 if (update_parameter){ 3231 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3232 conn->le_conn_interval_min = le_conn_interval_min; 3233 conn->le_conn_interval_max = le_conn_interval_max; 3234 conn->le_conn_latency = le_conn_latency; 3235 conn->le_supervision_timeout = le_supervision_timeout; 3236 } else { 3237 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3238 } 3239 } 3240 break; 3241 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3242 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3243 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3244 conn = hci_connection_for_handle(handle); 3245 if (conn) { 3246 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3247 } 3248 break; 3249 #endif 3250 default: 3251 break; 3252 } 3253 break; 3254 #endif 3255 case HCI_EVENT_VENDOR_SPECIFIC: 3256 // Vendor specific commands often create vendor specific event instead of num completed packets 3257 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3258 switch (hci_stack->manufacturer){ 3259 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3260 hci_stack->num_cmd_packets = 1; 3261 break; 3262 default: 3263 break; 3264 } 3265 break; 3266 default: 3267 break; 3268 } 3269 3270 handle_event_for_current_stack_state(packet, size); 3271 3272 // notify upper stack 3273 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3274 3275 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3276 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3277 handle = little_endian_read_16(packet, 3); 3278 hci_connection_t * aConn = hci_connection_for_handle(handle); 3279 // discard connection if app did not trigger a reconnect in the event handler 3280 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3281 hci_shutdown_connection(aConn); 3282 } 3283 } 3284 3285 // execute main loop 3286 hci_run(); 3287 } 3288 3289 #ifdef ENABLE_CLASSIC 3290 3291 #ifdef ENABLE_SCO_OVER_HCI 3292 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3293 static void sco_schedule_tx(hci_connection_t * conn); 3294 3295 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3296 log_debug("SCO TX Timeout"); 3297 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3298 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3299 if (!conn) return; 3300 3301 // trigger send 3302 conn->sco_tx_ready = 1; 3303 // extra packet if CVSD but SCO buffer is too short 3304 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3305 conn->sco_tx_ready++; 3306 } 3307 hci_notify_if_sco_can_send_now(); 3308 } 3309 3310 3311 #define SCO_TX_AFTER_RX_MS (6) 3312 3313 static void sco_schedule_tx(hci_connection_t * conn){ 3314 3315 uint32_t now = btstack_run_loop_get_time_ms(); 3316 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3317 int time_delta_ms = sco_tx_ms - now; 3318 3319 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3320 3321 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3322 btstack_run_loop_remove_timer(timer); 3323 btstack_run_loop_set_timer(timer, time_delta_ms); 3324 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3325 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3326 btstack_run_loop_add_timer(timer); 3327 } 3328 #endif 3329 3330 static void sco_handler(uint8_t * packet, uint16_t size){ 3331 // lookup connection struct 3332 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3333 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3334 if (!conn) return; 3335 3336 #ifdef ENABLE_SCO_OVER_HCI 3337 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3338 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3339 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3340 packet[2] = 0x3c; 3341 memmove(&packet[3], &packet[23], 63); 3342 size = 63; 3343 } 3344 } 3345 3346 if (hci_have_usb_transport()){ 3347 // Nothing to do 3348 } else { 3349 // 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); 3350 if (hci_stack->synchronous_flow_control_enabled == 0){ 3351 uint32_t now = btstack_run_loop_get_time_ms(); 3352 3353 if (!conn->sco_rx_valid){ 3354 // ignore first 10 packets 3355 conn->sco_rx_count++; 3356 // log_debug("sco rx count %u", conn->sco_rx_count); 3357 if (conn->sco_rx_count == 10) { 3358 // use first timestamp as is and pretent it just started 3359 conn->sco_rx_ms = now; 3360 conn->sco_rx_valid = 1; 3361 conn->sco_rx_count = 0; 3362 sco_schedule_tx(conn); 3363 } 3364 } else { 3365 // track expected arrival timme 3366 conn->sco_rx_count++; 3367 conn->sco_rx_ms += 7; 3368 int delta = (int32_t) (now - conn->sco_rx_ms); 3369 if (delta > 0){ 3370 conn->sco_rx_ms++; 3371 } 3372 // log_debug("sco rx %u", conn->sco_rx_ms); 3373 sco_schedule_tx(conn); 3374 } 3375 } 3376 } 3377 #endif 3378 3379 // deliver to app 3380 if (hci_stack->sco_packet_handler) { 3381 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3382 } 3383 3384 #ifdef HAVE_SCO_TRANSPORT 3385 // We can send one packet for each received packet 3386 conn->sco_tx_ready++; 3387 hci_notify_if_sco_can_send_now(); 3388 #endif 3389 3390 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3391 conn->num_packets_completed++; 3392 hci_stack->host_completed_packets = 1; 3393 hci_run(); 3394 #endif 3395 } 3396 #endif 3397 3398 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3399 hci_dump_packet(packet_type, 1, packet, size); 3400 switch (packet_type) { 3401 case HCI_EVENT_PACKET: 3402 event_handler(packet, size); 3403 break; 3404 case HCI_ACL_DATA_PACKET: 3405 acl_handler(packet, size); 3406 break; 3407 #ifdef ENABLE_CLASSIC 3408 case HCI_SCO_DATA_PACKET: 3409 sco_handler(packet, size); 3410 break; 3411 #endif 3412 default: 3413 break; 3414 } 3415 } 3416 3417 /** 3418 * @brief Add event packet handler. 3419 */ 3420 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3421 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3422 } 3423 3424 3425 /** Register HCI packet handlers */ 3426 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3427 hci_stack->acl_packet_handler = handler; 3428 } 3429 3430 #ifdef ENABLE_CLASSIC 3431 /** 3432 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3433 */ 3434 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3435 hci_stack->sco_packet_handler = handler; 3436 } 3437 #endif 3438 3439 static void hci_state_reset(void){ 3440 // no connections yet 3441 hci_stack->connections = NULL; 3442 3443 // keep discoverable/connectable as this has been requested by the client(s) 3444 // hci_stack->discoverable = 0; 3445 // hci_stack->connectable = 0; 3446 // hci_stack->bondable = 1; 3447 // hci_stack->own_addr_type = 0; 3448 3449 // buffer is free 3450 hci_stack->hci_packet_buffer_reserved = false; 3451 3452 // no pending cmds 3453 hci_stack->decline_reason = 0; 3454 3455 hci_stack->secure_connections_active = false; 3456 3457 #ifdef ENABLE_CLASSIC 3458 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3459 hci_stack->gap_tasks = 3460 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3461 GAP_TASK_SET_CLASS_OF_DEVICE | 3462 GAP_TASK_SET_LOCAL_NAME | 3463 GAP_TASK_SET_EIR_DATA | 3464 GAP_TASK_WRITE_SCAN_ENABLE; 3465 #endif 3466 3467 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3468 hci_stack->classic_read_local_oob_data = true; 3469 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3470 #endif 3471 3472 // LE 3473 #ifdef ENABLE_BLE 3474 memset(hci_stack->le_random_address, 0, 6); 3475 hci_stack->le_random_address_set = 0; 3476 #endif 3477 #ifdef ENABLE_LE_CENTRAL 3478 hci_stack->le_scanning_active = false; 3479 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3480 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3481 hci_stack->le_whitelist_capacity = 0; 3482 #endif 3483 #ifdef ENABLE_LE_PERIPHERAL 3484 hci_stack->le_advertisements_active = false; 3485 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3486 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3487 } 3488 if (hci_stack->le_advertisements_data != NULL){ 3489 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3490 } 3491 #endif 3492 } 3493 3494 #ifdef ENABLE_CLASSIC 3495 /** 3496 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3497 */ 3498 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3499 // store and open remote device db 3500 hci_stack->link_key_db = link_key_db; 3501 if (hci_stack->link_key_db) { 3502 hci_stack->link_key_db->open(); 3503 } 3504 } 3505 #endif 3506 3507 void hci_init(const hci_transport_t *transport, const void *config){ 3508 3509 #ifdef HAVE_MALLOC 3510 if (!hci_stack) { 3511 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3512 } 3513 #else 3514 hci_stack = &hci_stack_static; 3515 #endif 3516 memset(hci_stack, 0, sizeof(hci_stack_t)); 3517 3518 // reference to use transport layer implementation 3519 hci_stack->hci_transport = transport; 3520 3521 // reference to used config 3522 hci_stack->config = config; 3523 3524 // setup pointer for outgoing packet buffer 3525 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3526 3527 // max acl payload size defined in config.h 3528 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3529 3530 // register packet handlers with transport 3531 transport->register_packet_handler(&packet_handler); 3532 3533 hci_stack->state = HCI_STATE_OFF; 3534 3535 // class of device 3536 hci_stack->class_of_device = 0x007a020c; // Smartphone 3537 3538 // bondable by default 3539 hci_stack->bondable = 1; 3540 3541 #ifdef ENABLE_CLASSIC 3542 // classic name 3543 hci_stack->local_name = default_classic_name; 3544 3545 // Master slave policy 3546 hci_stack->master_slave_policy = 1; 3547 3548 // Allow Role Switch 3549 hci_stack->allow_role_switch = 1; 3550 3551 // Default / minimum security level = 2 3552 hci_stack->gap_security_level = LEVEL_2; 3553 3554 // Default Security Mode 4 3555 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3556 3557 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3558 hci_stack->gap_required_encyrption_key_size = 7; 3559 3560 // Link Supervision Timeout 3561 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3562 3563 #endif 3564 3565 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3566 hci_stack->ssp_enable = 1; 3567 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3568 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3569 hci_stack->ssp_auto_accept = 1; 3570 3571 // Secure Connections: enable (requires support from Controller) 3572 hci_stack->secure_connections_enable = true; 3573 3574 // voice setting - signed 16 bit pcm data with CVSD over the air 3575 hci_stack->sco_voice_setting = 0x60; 3576 3577 #ifdef ENABLE_LE_CENTRAL 3578 // connection parameter to use for outgoing connections 3579 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3580 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3581 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3582 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3583 hci_stack->le_connection_latency = 4; // 4 3584 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3585 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3586 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3587 3588 // default LE Scanning 3589 hci_stack->le_scan_type = 0x1; // active 3590 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3591 hci_stack->le_scan_window = 0x30; // 30 ms 3592 #endif 3593 3594 #ifdef ENABLE_LE_PERIPHERAL 3595 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3596 #endif 3597 3598 // connection parameter range used to answer connection parameter update requests in l2cap 3599 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3600 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3601 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3602 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3603 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3604 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3605 3606 hci_state_reset(); 3607 } 3608 3609 void hci_deinit(void){ 3610 #ifdef HAVE_MALLOC 3611 if (hci_stack) { 3612 free(hci_stack); 3613 } 3614 #endif 3615 hci_stack = NULL; 3616 3617 #ifdef ENABLE_CLASSIC 3618 disable_l2cap_timeouts = 0; 3619 #endif 3620 } 3621 3622 /** 3623 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3624 */ 3625 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3626 hci_stack->chipset = chipset_driver; 3627 3628 // reset chipset driver - init is also called on power_up 3629 if (hci_stack->chipset && hci_stack->chipset->init){ 3630 hci_stack->chipset->init(hci_stack->config); 3631 } 3632 } 3633 3634 /** 3635 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3636 */ 3637 void hci_set_control(const btstack_control_t *hardware_control){ 3638 // references to used control implementation 3639 hci_stack->control = hardware_control; 3640 // init with transport config 3641 hardware_control->init(hci_stack->config); 3642 } 3643 3644 void hci_close(void){ 3645 3646 #ifdef ENABLE_CLASSIC 3647 // close remote device db 3648 if (hci_stack->link_key_db) { 3649 hci_stack->link_key_db->close(); 3650 } 3651 #endif 3652 3653 btstack_linked_list_iterator_t lit; 3654 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3655 while (btstack_linked_list_iterator_has_next(&lit)){ 3656 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3657 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3658 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3659 hci_shutdown_connection(connection); 3660 } 3661 3662 hci_power_control(HCI_POWER_OFF); 3663 3664 #ifdef HAVE_MALLOC 3665 free(hci_stack); 3666 #endif 3667 hci_stack = NULL; 3668 } 3669 3670 #ifdef HAVE_SCO_TRANSPORT 3671 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3672 hci_stack->sco_transport = sco_transport; 3673 sco_transport->register_packet_handler(&packet_handler); 3674 } 3675 #endif 3676 3677 #ifdef ENABLE_CLASSIC 3678 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3679 // validate ranage and set 3680 if (encryption_key_size < 7) return; 3681 if (encryption_key_size > 16) return; 3682 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3683 } 3684 3685 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3686 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3687 hci_stack->gap_security_mode = security_mode; 3688 return ERROR_CODE_SUCCESS; 3689 } else { 3690 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3691 } 3692 } 3693 3694 gap_security_mode_t gap_get_security_mode(void){ 3695 return hci_stack->gap_security_mode; 3696 } 3697 3698 void gap_set_security_level(gap_security_level_t security_level){ 3699 hci_stack->gap_security_level = security_level; 3700 } 3701 3702 gap_security_level_t gap_get_security_level(void){ 3703 if (hci_stack->gap_secure_connections_only_mode){ 3704 return LEVEL_4; 3705 } 3706 return hci_stack->gap_security_level; 3707 } 3708 3709 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3710 hci_stack->gap_minimal_service_security_level = security_level; 3711 } 3712 3713 void gap_set_secure_connections_only_mode(bool enable){ 3714 hci_stack->gap_secure_connections_only_mode = enable; 3715 } 3716 3717 bool gap_get_secure_connections_only_mode(void){ 3718 return hci_stack->gap_secure_connections_only_mode; 3719 } 3720 #endif 3721 3722 #ifdef ENABLE_CLASSIC 3723 void gap_set_class_of_device(uint32_t class_of_device){ 3724 hci_stack->class_of_device = class_of_device; 3725 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3726 hci_run(); 3727 } 3728 3729 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3730 hci_stack->default_link_policy_settings = default_link_policy_settings; 3731 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3732 hci_run(); 3733 } 3734 3735 void gap_set_allow_role_switch(bool allow_role_switch){ 3736 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3737 } 3738 3739 uint8_t hci_get_allow_role_switch(void){ 3740 return hci_stack->allow_role_switch; 3741 } 3742 3743 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3744 hci_stack->link_supervision_timeout = link_supervision_timeout; 3745 } 3746 3747 void hci_disable_l2cap_timeout_check(void){ 3748 disable_l2cap_timeouts = 1; 3749 } 3750 #endif 3751 3752 #ifndef HAVE_HOST_CONTROLLER_API 3753 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3754 void hci_set_bd_addr(bd_addr_t addr){ 3755 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3756 hci_stack->custom_bd_addr_set = 1; 3757 } 3758 #endif 3759 3760 // State-Module-Driver overview 3761 // state module low-level 3762 // HCI_STATE_OFF off close 3763 // HCI_STATE_INITIALIZING, on open 3764 // HCI_STATE_WORKING, on open 3765 // HCI_STATE_HALTING, on open 3766 // HCI_STATE_SLEEPING, off/sleep close 3767 // HCI_STATE_FALLING_ASLEEP on open 3768 3769 static int hci_power_control_on(void){ 3770 3771 // power on 3772 int err = 0; 3773 if (hci_stack->control && hci_stack->control->on){ 3774 err = (*hci_stack->control->on)(); 3775 } 3776 if (err){ 3777 log_error( "POWER_ON failed"); 3778 hci_emit_hci_open_failed(); 3779 return err; 3780 } 3781 3782 // int chipset driver 3783 if (hci_stack->chipset && hci_stack->chipset->init){ 3784 hci_stack->chipset->init(hci_stack->config); 3785 } 3786 3787 // init transport 3788 if (hci_stack->hci_transport->init){ 3789 hci_stack->hci_transport->init(hci_stack->config); 3790 } 3791 3792 // open transport 3793 err = hci_stack->hci_transport->open(); 3794 if (err){ 3795 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3796 if (hci_stack->control && hci_stack->control->off){ 3797 (*hci_stack->control->off)(); 3798 } 3799 hci_emit_hci_open_failed(); 3800 return err; 3801 } 3802 return 0; 3803 } 3804 3805 static void hci_power_control_off(void){ 3806 3807 log_info("hci_power_control_off"); 3808 3809 // close low-level device 3810 hci_stack->hci_transport->close(); 3811 3812 log_info("hci_power_control_off - hci_transport closed"); 3813 3814 // power off 3815 if (hci_stack->control && hci_stack->control->off){ 3816 (*hci_stack->control->off)(); 3817 } 3818 3819 log_info("hci_power_control_off - control closed"); 3820 3821 hci_stack->state = HCI_STATE_OFF; 3822 } 3823 3824 static void hci_power_control_sleep(void){ 3825 3826 log_info("hci_power_control_sleep"); 3827 3828 #if 0 3829 // don't close serial port during sleep 3830 3831 // close low-level device 3832 hci_stack->hci_transport->close(hci_stack->config); 3833 #endif 3834 3835 // sleep mode 3836 if (hci_stack->control && hci_stack->control->sleep){ 3837 (*hci_stack->control->sleep)(); 3838 } 3839 3840 hci_stack->state = HCI_STATE_SLEEPING; 3841 } 3842 3843 static int hci_power_control_wake(void){ 3844 3845 log_info("hci_power_control_wake"); 3846 3847 // wake on 3848 if (hci_stack->control && hci_stack->control->wake){ 3849 (*hci_stack->control->wake)(); 3850 } 3851 3852 #if 0 3853 // open low-level device 3854 int err = hci_stack->hci_transport->open(hci_stack->config); 3855 if (err){ 3856 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3857 if (hci_stack->control && hci_stack->control->off){ 3858 (*hci_stack->control->off)(); 3859 } 3860 hci_emit_hci_open_failed(); 3861 return err; 3862 } 3863 #endif 3864 3865 return 0; 3866 } 3867 3868 static void hci_power_transition_to_initializing(void){ 3869 // set up state machine 3870 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3871 hci_stack->hci_packet_buffer_reserved = false; 3872 hci_stack->state = HCI_STATE_INITIALIZING; 3873 hci_stack->substate = HCI_INIT_SEND_RESET; 3874 } 3875 3876 // returns error 3877 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3878 int err; 3879 switch (power_mode){ 3880 case HCI_POWER_ON: 3881 err = hci_power_control_on(); 3882 if (err != 0) { 3883 log_error("hci_power_control_on() error %d", err); 3884 return err; 3885 } 3886 hci_power_transition_to_initializing(); 3887 break; 3888 case HCI_POWER_OFF: 3889 // do nothing 3890 break; 3891 case HCI_POWER_SLEEP: 3892 // do nothing (with SLEEP == OFF) 3893 break; 3894 default: 3895 btstack_assert(false); 3896 break; 3897 } 3898 return ERROR_CODE_SUCCESS; 3899 } 3900 3901 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3902 switch (power_mode){ 3903 case HCI_POWER_ON: 3904 // do nothing 3905 break; 3906 case HCI_POWER_OFF: 3907 // no connections yet, just turn it off 3908 hci_power_control_off(); 3909 break; 3910 case HCI_POWER_SLEEP: 3911 // no connections yet, just turn it off 3912 hci_power_control_sleep(); 3913 break; 3914 default: 3915 btstack_assert(false); 3916 break; 3917 } 3918 return ERROR_CODE_SUCCESS; 3919 } 3920 3921 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3922 switch (power_mode){ 3923 case HCI_POWER_ON: 3924 // do nothing 3925 break; 3926 case HCI_POWER_OFF: 3927 // see hci_run 3928 hci_stack->state = HCI_STATE_HALTING; 3929 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3930 break; 3931 case HCI_POWER_SLEEP: 3932 // see hci_run 3933 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3934 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3935 break; 3936 default: 3937 btstack_assert(false); 3938 break; 3939 } 3940 return ERROR_CODE_SUCCESS; 3941 } 3942 3943 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3944 switch (power_mode){ 3945 case HCI_POWER_ON: 3946 hci_power_transition_to_initializing(); 3947 break; 3948 case HCI_POWER_OFF: 3949 // do nothing 3950 break; 3951 case HCI_POWER_SLEEP: 3952 // see hci_run 3953 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3954 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3955 break; 3956 default: 3957 btstack_assert(false); 3958 break; 3959 } 3960 return ERROR_CODE_SUCCESS; 3961 } 3962 3963 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3964 switch (power_mode){ 3965 case HCI_POWER_ON: 3966 hci_power_transition_to_initializing(); 3967 break; 3968 case HCI_POWER_OFF: 3969 // see hci_run 3970 hci_stack->state = HCI_STATE_HALTING; 3971 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3972 break; 3973 case HCI_POWER_SLEEP: 3974 // do nothing 3975 break; 3976 default: 3977 btstack_assert(false); 3978 break; 3979 } 3980 return ERROR_CODE_SUCCESS; 3981 } 3982 3983 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3984 int err; 3985 switch (power_mode){ 3986 case HCI_POWER_ON: 3987 err = hci_power_control_wake(); 3988 if (err) return err; 3989 hci_power_transition_to_initializing(); 3990 break; 3991 case HCI_POWER_OFF: 3992 hci_stack->state = HCI_STATE_HALTING; 3993 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3994 break; 3995 case HCI_POWER_SLEEP: 3996 // do nothing 3997 break; 3998 default: 3999 btstack_assert(false); 4000 break; 4001 } 4002 return ERROR_CODE_SUCCESS; 4003 } 4004 4005 int hci_power_control(HCI_POWER_MODE power_mode){ 4006 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4007 int err = 0; 4008 switch (hci_stack->state){ 4009 case HCI_STATE_OFF: 4010 err = hci_power_control_state_off(power_mode); 4011 break; 4012 case HCI_STATE_INITIALIZING: 4013 err = hci_power_control_state_initializing(power_mode); 4014 break; 4015 case HCI_STATE_WORKING: 4016 err = hci_power_control_state_working(power_mode); 4017 break; 4018 case HCI_STATE_HALTING: 4019 err = hci_power_control_state_halting(power_mode); 4020 break; 4021 case HCI_STATE_FALLING_ASLEEP: 4022 err = hci_power_control_state_falling_asleep(power_mode); 4023 break; 4024 case HCI_STATE_SLEEPING: 4025 err = hci_power_control_state_sleeping(power_mode); 4026 break; 4027 default: 4028 btstack_assert(false); 4029 break; 4030 } 4031 if (err != 0){ 4032 return err; 4033 } 4034 4035 // create internal event 4036 hci_emit_state(); 4037 4038 // trigger next/first action 4039 hci_run(); 4040 4041 return 0; 4042 } 4043 4044 4045 #ifdef ENABLE_CLASSIC 4046 4047 static void hci_update_scan_enable(void){ 4048 // 2 = page scan, 1 = inq scan 4049 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4050 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4051 hci_run(); 4052 } 4053 4054 void gap_discoverable_control(uint8_t enable){ 4055 if (enable) enable = 1; // normalize argument 4056 4057 if (hci_stack->discoverable == enable){ 4058 hci_emit_discoverable_enabled(hci_stack->discoverable); 4059 return; 4060 } 4061 4062 hci_stack->discoverable = enable; 4063 hci_update_scan_enable(); 4064 } 4065 4066 void gap_connectable_control(uint8_t enable){ 4067 if (enable) enable = 1; // normalize argument 4068 4069 // don't emit event 4070 if (hci_stack->connectable == enable) return; 4071 4072 hci_stack->connectable = enable; 4073 hci_update_scan_enable(); 4074 } 4075 #endif 4076 4077 void gap_local_bd_addr(bd_addr_t address_buffer){ 4078 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4079 } 4080 4081 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4082 static void hci_host_num_completed_packets(void){ 4083 4084 // create packet manually as arrays are not supported and num_commands should not get reduced 4085 hci_reserve_packet_buffer(); 4086 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4087 4088 uint16_t size = 0; 4089 uint16_t num_handles = 0; 4090 packet[size++] = 0x35; 4091 packet[size++] = 0x0c; 4092 size++; // skip param len 4093 size++; // skip num handles 4094 4095 // add { handle, packets } entries 4096 btstack_linked_item_t * it; 4097 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4098 hci_connection_t * connection = (hci_connection_t *) it; 4099 if (connection->num_packets_completed){ 4100 little_endian_store_16(packet, size, connection->con_handle); 4101 size += 2; 4102 little_endian_store_16(packet, size, connection->num_packets_completed); 4103 size += 2; 4104 // 4105 num_handles++; 4106 connection->num_packets_completed = 0; 4107 } 4108 } 4109 4110 packet[2] = size - 3; 4111 packet[3] = num_handles; 4112 4113 hci_stack->host_completed_packets = 0; 4114 4115 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4116 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4117 4118 // release packet buffer for synchronous transport implementations 4119 if (hci_transport_synchronous()){ 4120 hci_release_packet_buffer(); 4121 hci_emit_transport_packet_sent(); 4122 } 4123 } 4124 #endif 4125 4126 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4127 UNUSED(ds); 4128 hci_stack->substate = HCI_HALTING_CLOSE; 4129 // allow packet handlers to defer final shutdown 4130 hci_emit_state(); 4131 hci_run(); 4132 } 4133 4134 static bool hci_run_acl_fragments(void){ 4135 if (hci_stack->acl_fragmentation_total_size > 0u) { 4136 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4137 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4138 if (connection) { 4139 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4140 hci_send_acl_packet_fragments(connection); 4141 return true; 4142 } 4143 } else { 4144 // connection gone -> discard further fragments 4145 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4146 hci_stack->acl_fragmentation_total_size = 0; 4147 hci_stack->acl_fragmentation_pos = 0; 4148 } 4149 } 4150 return false; 4151 } 4152 4153 #ifdef ENABLE_CLASSIC 4154 static bool hci_run_general_gap_classic(void){ 4155 4156 // assert stack is working and classic is active 4157 if (hci_classic_supported() == false) return false; 4158 if (hci_stack->state != HCI_STATE_WORKING) return false; 4159 4160 // decline incoming connections 4161 if (hci_stack->decline_reason){ 4162 uint8_t reason = hci_stack->decline_reason; 4163 hci_stack->decline_reason = 0; 4164 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4165 return true; 4166 } 4167 4168 if (hci_stack->gap_tasks != 0){ 4169 hci_run_gap_tasks_classic(); 4170 return true; 4171 } 4172 4173 // start/stop inquiry 4174 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4175 uint8_t duration = hci_stack->inquiry_state; 4176 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4177 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4178 return true; 4179 } 4180 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4181 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4182 hci_send_cmd(&hci_inquiry_cancel); 4183 return true; 4184 } 4185 // remote name request 4186 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4187 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4188 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4189 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4190 return true; 4191 } 4192 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4193 // Local OOB data 4194 if (hci_stack->classic_read_local_oob_data){ 4195 hci_stack->classic_read_local_oob_data = false; 4196 if (hci_stack->local_supported_commands[1] & 0x10u){ 4197 hci_send_cmd(&hci_read_local_extended_oob_data); 4198 } else { 4199 hci_send_cmd(&hci_read_local_oob_data); 4200 } 4201 } 4202 #endif 4203 // pairing 4204 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4205 uint8_t state = hci_stack->gap_pairing_state; 4206 uint8_t pin_code[16]; 4207 switch (state){ 4208 case GAP_PAIRING_STATE_SEND_PIN: 4209 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4210 memset(pin_code, 0, 16); 4211 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4212 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4213 break; 4214 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4215 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4216 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4217 break; 4218 case GAP_PAIRING_STATE_SEND_PASSKEY: 4219 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4220 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4221 break; 4222 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4223 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4224 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4225 break; 4226 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4228 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4229 break; 4230 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4231 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4232 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4233 break; 4234 default: 4235 break; 4236 } 4237 return true; 4238 } 4239 return false; 4240 } 4241 #endif 4242 4243 #ifdef ENABLE_BLE 4244 static bool hci_run_general_gap_le(void){ 4245 4246 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4247 4248 if (hci_stack->state != HCI_STATE_WORKING) return false; 4249 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4250 4251 4252 // Phase 1: collect what to stop 4253 4254 bool scanning_stop = false; 4255 bool connecting_stop = false; 4256 bool advertising_stop = false; 4257 4258 #ifndef ENABLE_LE_CENTRAL 4259 UNUSED(scanning_stop); 4260 UNUSED(connecting_stop); 4261 #endif 4262 #ifndef ENABLE_LE_PERIPHERAL 4263 UNUSED(advertising_stop); 4264 #endif 4265 4266 // check if whitelist needs modification 4267 bool whitelist_modification_pending = false; 4268 btstack_linked_list_iterator_t lit; 4269 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4270 while (btstack_linked_list_iterator_has_next(&lit)){ 4271 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4272 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4273 whitelist_modification_pending = true; 4274 break; 4275 } 4276 } 4277 // check if resolving list needs modification 4278 bool resolving_list_modification_pending = false; 4279 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4280 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4281 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4282 resolving_list_modification_pending = true; 4283 } 4284 #endif 4285 4286 #ifdef ENABLE_LE_CENTRAL 4287 // scanning control 4288 if (hci_stack->le_scanning_active) { 4289 // stop if: 4290 // - parameter change required 4291 // - it's disabled 4292 // - whitelist change required but used for scanning 4293 // - resolving list modified 4294 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4295 if ((hci_stack->le_scanning_param_update) || 4296 !hci_stack->le_scanning_enabled || 4297 scanning_uses_whitelist || 4298 resolving_list_modification_pending){ 4299 4300 scanning_stop = true; 4301 } 4302 } 4303 #endif 4304 4305 #ifdef ENABLE_LE_CENTRAL 4306 // connecting control 4307 bool connecting_with_whitelist; 4308 switch (hci_stack->le_connecting_state){ 4309 case LE_CONNECTING_DIRECT: 4310 case LE_CONNECTING_WHITELIST: 4311 // stop connecting if: 4312 // - connecting uses white and whitelist modification pending 4313 // - if it got disabled 4314 // - resolving list modified 4315 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4316 if ((connecting_with_whitelist && whitelist_modification_pending) || 4317 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4318 resolving_list_modification_pending) { 4319 4320 connecting_stop = true; 4321 } 4322 break; 4323 default: 4324 break; 4325 } 4326 #endif 4327 4328 #ifdef ENABLE_LE_PERIPHERAL 4329 // le advertisement control 4330 if (hci_stack->le_advertisements_active){ 4331 // stop if: 4332 // - parameter change required 4333 // - it's disabled 4334 // - whitelist change required but used for advertisement filter policy 4335 // - resolving list modified 4336 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4337 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4338 if (advertising_change || 4339 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4340 (advertising_uses_whitelist & whitelist_modification_pending) || 4341 resolving_list_modification_pending) { 4342 4343 advertising_stop = true; 4344 } 4345 } 4346 #endif 4347 4348 4349 // Phase 2: stop everything that should be off during modifications 4350 4351 #ifdef ENABLE_LE_CENTRAL 4352 if (scanning_stop){ 4353 hci_stack->le_scanning_active = false; 4354 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4355 return true; 4356 } 4357 #endif 4358 4359 #ifdef ENABLE_LE_CENTRAL 4360 if (connecting_stop){ 4361 hci_send_cmd(&hci_le_create_connection_cancel); 4362 return true; 4363 } 4364 #endif 4365 4366 #ifdef ENABLE_LE_PERIPHERAL 4367 if (advertising_stop){ 4368 hci_stack->le_advertisements_active = false; 4369 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4370 return true; 4371 } 4372 #endif 4373 4374 // Phase 3: modify 4375 4376 #ifdef ENABLE_LE_CENTRAL 4377 if (hci_stack->le_scanning_param_update){ 4378 hci_stack->le_scanning_param_update = false; 4379 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4380 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4381 return true; 4382 } 4383 #endif 4384 4385 #ifdef ENABLE_LE_PERIPHERAL 4386 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4387 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4388 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4389 hci_send_cmd(&hci_le_set_advertising_parameters, 4390 hci_stack->le_advertisements_interval_min, 4391 hci_stack->le_advertisements_interval_max, 4392 hci_stack->le_advertisements_type, 4393 hci_stack->le_advertisements_own_addr_type, 4394 hci_stack->le_advertisements_direct_address_type, 4395 hci_stack->le_advertisements_direct_address, 4396 hci_stack->le_advertisements_channel_map, 4397 hci_stack->le_advertisements_filter_policy); 4398 return true; 4399 } 4400 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4401 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4402 uint8_t adv_data_clean[31]; 4403 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4404 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4405 hci_stack->le_advertisements_data_len); 4406 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4407 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4408 return true; 4409 } 4410 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4411 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4412 uint8_t scan_data_clean[31]; 4413 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4414 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4415 hci_stack->le_scan_response_data_len); 4416 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4417 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4418 return true; 4419 } 4420 #endif 4421 4422 4423 #ifdef ENABLE_LE_CENTRAL 4424 // if connect with whitelist was active and is not cancelled yet, wait until next time 4425 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4426 #endif 4427 4428 // LE Whitelist Management 4429 if (whitelist_modification_pending){ 4430 // add/remove entries 4431 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4432 while (btstack_linked_list_iterator_has_next(&lit)){ 4433 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4434 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4435 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4436 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4437 return true; 4438 } 4439 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4440 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4441 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4442 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4443 return true; 4444 } 4445 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4446 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4447 btstack_memory_whitelist_entry_free(entry); 4448 } 4449 } 4450 } 4451 4452 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4453 // LE Resolving List Management 4454 if (resolving_list_supported) { 4455 uint16_t i; 4456 switch (hci_stack->le_resolving_list_state) { 4457 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4458 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4459 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4460 return true; 4461 case LE_RESOLVING_LIST_READ_SIZE: 4462 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4463 hci_send_cmd(&hci_le_read_resolving_list_size); 4464 return true; 4465 case LE_RESOLVING_LIST_SEND_CLEAR: 4466 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4467 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4468 sizeof(hci_stack->le_resolving_list_add_entries)); 4469 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4470 sizeof(hci_stack->le_resolving_list_remove_entries)); 4471 hci_send_cmd(&hci_le_clear_resolving_list); 4472 return true; 4473 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4474 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4475 uint8_t offset = i >> 3; 4476 uint8_t mask = 1 << (i & 7); 4477 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4478 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4479 bd_addr_t peer_identity_addreses; 4480 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4481 sm_key_t peer_irk; 4482 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4483 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4484 4485 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4486 // trigger whitelist entry 'update' (work around for controller bug) 4487 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4488 while (btstack_linked_list_iterator_has_next(&lit)) { 4489 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4490 if (entry->address_type != peer_identity_addr_type) continue; 4491 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4492 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4493 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4494 } 4495 #endif 4496 4497 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4498 peer_identity_addreses); 4499 return true; 4500 } 4501 4502 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4503 4504 /* fall through */ 4505 4506 case LE_RESOLVING_LIST_ADD_ENTRIES: 4507 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4508 uint8_t offset = i >> 3; 4509 uint8_t mask = 1 << (i & 7); 4510 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4511 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4512 bd_addr_t peer_identity_addreses; 4513 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4514 sm_key_t peer_irk; 4515 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4516 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4517 const uint8_t *local_irk = gap_get_persistent_irk(); 4518 // command uses format specifier 'P' that stores 16-byte value without flip 4519 uint8_t local_irk_flipped[16]; 4520 uint8_t peer_irk_flipped[16]; 4521 reverse_128(local_irk, local_irk_flipped); 4522 reverse_128(peer_irk, peer_irk_flipped); 4523 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4524 peer_irk_flipped, local_irk_flipped); 4525 return true; 4526 } 4527 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4528 break; 4529 4530 default: 4531 break; 4532 } 4533 } 4534 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4535 #endif 4536 4537 // Phase 4: restore state 4538 4539 #ifdef ENABLE_LE_CENTRAL 4540 // re-start scanning 4541 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4542 hci_stack->le_scanning_active = true; 4543 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4544 return true; 4545 } 4546 #endif 4547 4548 #ifdef ENABLE_LE_CENTRAL 4549 // re-start connecting 4550 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4551 bd_addr_t null_addr; 4552 memset(null_addr, 0, 6); 4553 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4554 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4555 hci_send_cmd(&hci_le_create_connection, 4556 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4557 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4558 1, // use whitelist 4559 0, // peer address type 4560 null_addr, // peer bd addr 4561 hci_stack->le_connection_own_addr_type, // our addr type: 4562 hci_stack->le_connection_interval_min, // conn interval min 4563 hci_stack->le_connection_interval_max, // conn interval max 4564 hci_stack->le_connection_latency, // conn latency 4565 hci_stack->le_supervision_timeout, // conn latency 4566 hci_stack->le_minimum_ce_length, // min ce length 4567 hci_stack->le_maximum_ce_length // max ce length 4568 ); 4569 return true; 4570 } 4571 #endif 4572 4573 #ifdef ENABLE_LE_PERIPHERAL 4574 // re-start advertising 4575 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4576 // check if advertisements should be enabled given 4577 hci_stack->le_advertisements_active = true; 4578 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4579 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4580 return true; 4581 } 4582 #endif 4583 4584 return false; 4585 } 4586 #endif 4587 4588 static bool hci_run_general_pending_commands(void){ 4589 btstack_linked_item_t * it; 4590 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4591 hci_connection_t * connection = (hci_connection_t *) it; 4592 4593 switch(connection->state){ 4594 case SEND_CREATE_CONNECTION: 4595 switch(connection->address_type){ 4596 #ifdef ENABLE_CLASSIC 4597 case BD_ADDR_TYPE_ACL: 4598 log_info("sending hci_create_connection"); 4599 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4600 break; 4601 #endif 4602 default: 4603 #ifdef ENABLE_BLE 4604 #ifdef ENABLE_LE_CENTRAL 4605 log_info("sending hci_le_create_connection"); 4606 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4607 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4608 hci_send_cmd(&hci_le_create_connection, 4609 hci_stack->le_connection_scan_interval, // conn scan interval 4610 hci_stack->le_connection_scan_window, // conn scan windows 4611 0, // don't use whitelist 4612 connection->address_type, // peer address type 4613 connection->address, // peer bd addr 4614 hci_stack->le_connection_own_addr_type, // our addr type: 4615 hci_stack->le_connection_interval_min, // conn interval min 4616 hci_stack->le_connection_interval_max, // conn interval max 4617 hci_stack->le_connection_latency, // conn latency 4618 hci_stack->le_supervision_timeout, // conn latency 4619 hci_stack->le_minimum_ce_length, // min ce length 4620 hci_stack->le_maximum_ce_length // max ce length 4621 ); 4622 connection->state = SENT_CREATE_CONNECTION; 4623 #endif 4624 #endif 4625 break; 4626 } 4627 return true; 4628 4629 #ifdef ENABLE_CLASSIC 4630 case RECEIVED_CONNECTION_REQUEST: 4631 connection->role = HCI_ROLE_SLAVE; 4632 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4633 log_info("sending hci_accept_connection_request"); 4634 connection->state = ACCEPTED_CONNECTION_REQUEST; 4635 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4636 } 4637 return true; 4638 #endif 4639 4640 #ifdef ENABLE_BLE 4641 #ifdef ENABLE_LE_CENTRAL 4642 case SEND_CANCEL_CONNECTION: 4643 connection->state = SENT_CANCEL_CONNECTION; 4644 hci_send_cmd(&hci_le_create_connection_cancel); 4645 return true; 4646 #endif 4647 #endif 4648 case SEND_DISCONNECT: 4649 connection->state = SENT_DISCONNECT; 4650 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4651 return true; 4652 4653 default: 4654 break; 4655 } 4656 4657 // no further commands if connection is about to get shut down 4658 if (connection->state == SENT_DISCONNECT) continue; 4659 4660 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4661 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4662 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4663 return true; 4664 } 4665 4666 #ifdef ENABLE_CLASSIC 4667 4668 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4669 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4670 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4671 return true; 4672 } 4673 4674 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4675 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4676 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4677 return true; 4678 } 4679 4680 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4681 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4682 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4683 return true; 4684 } 4685 4686 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4687 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4688 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4689 return true; 4690 } 4691 4692 // Handling link key request requires remote supported features 4693 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4694 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4695 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4696 4697 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4698 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4699 if (have_link_key && security_level_sufficient){ 4700 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4701 } else { 4702 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4703 } 4704 return true; 4705 } 4706 4707 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4708 log_info("denying to pin request"); 4709 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4710 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4711 return true; 4712 } 4713 4714 // security assessment requires remote features 4715 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4716 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4717 hci_ssp_assess_security_on_io_cap_request(connection); 4718 // 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 4719 } 4720 4721 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4722 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4723 // set authentication requirements: 4724 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4725 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4726 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4727 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4728 authreq |= 1; 4729 } 4730 bool bonding = hci_stack->bondable; 4731 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4732 // if we have received IO Cap Response, we're in responder role 4733 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4734 if (bonding && !remote_bonding){ 4735 log_info("Remote not bonding, dropping local flag"); 4736 bonding = false; 4737 } 4738 } 4739 if (bonding){ 4740 if (connection->bonding_flags & BONDING_DEDICATED){ 4741 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4742 } else { 4743 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4744 } 4745 } 4746 uint8_t have_oob_data = 0; 4747 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4748 if (connection->classic_oob_c_192 != NULL){ 4749 have_oob_data |= 1; 4750 } 4751 if (connection->classic_oob_c_256 != NULL){ 4752 have_oob_data |= 2; 4753 } 4754 #endif 4755 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4756 return true; 4757 } 4758 4759 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4760 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4761 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4762 return true; 4763 } 4764 4765 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4766 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4767 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4768 const uint8_t zero[16] = { 0 }; 4769 const uint8_t * r_192 = zero; 4770 const uint8_t * c_192 = zero; 4771 const uint8_t * r_256 = zero; 4772 const uint8_t * c_256 = zero; 4773 // verify P-256 OOB 4774 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4775 c_256 = connection->classic_oob_c_256; 4776 if (connection->classic_oob_r_256 != NULL) { 4777 r_256 = connection->classic_oob_r_256; 4778 } 4779 } 4780 // verify P-192 OOB 4781 if ((connection->classic_oob_c_192 != NULL)) { 4782 c_192 = connection->classic_oob_c_192; 4783 if (connection->classic_oob_r_192 != NULL) { 4784 r_192 = connection->classic_oob_r_192; 4785 } 4786 } 4787 4788 // assess security 4789 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4790 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4791 if (need_level_4 && !can_reach_level_4){ 4792 log_info("Level 4 required, but not possible -> abort"); 4793 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4794 // send oob negative reply 4795 c_256 = NULL; 4796 c_192 = NULL; 4797 } 4798 4799 // Reply 4800 if (c_256 != zero) { 4801 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4802 } else if (c_192 != zero){ 4803 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4804 } else { 4805 hci_stack->classic_oob_con_handle = connection->con_handle; 4806 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4807 } 4808 return true; 4809 } 4810 #endif 4811 4812 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4813 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4814 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4815 return true; 4816 } 4817 4818 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4819 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4820 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4821 return true; 4822 } 4823 4824 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4825 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4826 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4827 return true; 4828 } 4829 4830 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4831 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4832 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4833 connection->state = SENT_DISCONNECT; 4834 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4835 return true; 4836 } 4837 4838 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4839 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4840 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4841 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4842 return true; 4843 } 4844 4845 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4846 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4847 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4848 return true; 4849 } 4850 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4851 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4852 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4853 return true; 4854 } 4855 #endif 4856 4857 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4858 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4859 #ifdef ENABLE_CLASSIC 4860 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4861 #endif 4862 if (connection->state != SENT_DISCONNECT){ 4863 connection->state = SENT_DISCONNECT; 4864 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4865 return true; 4866 } 4867 } 4868 4869 #ifdef ENABLE_CLASSIC 4870 uint16_t sniff_min_interval; 4871 switch (connection->sniff_min_interval){ 4872 case 0: 4873 break; 4874 case 0xffff: 4875 connection->sniff_min_interval = 0; 4876 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4877 return true; 4878 default: 4879 sniff_min_interval = connection->sniff_min_interval; 4880 connection->sniff_min_interval = 0; 4881 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4882 return true; 4883 } 4884 4885 if (connection->sniff_subrating_max_latency != 0xffff){ 4886 uint16_t max_latency = connection->sniff_subrating_max_latency; 4887 connection->sniff_subrating_max_latency = 0; 4888 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4889 return true; 4890 } 4891 4892 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4893 uint8_t service_type = (uint8_t) connection->qos_service_type; 4894 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4895 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); 4896 return true; 4897 } 4898 4899 if (connection->request_role != HCI_ROLE_INVALID){ 4900 hci_role_t role = connection->request_role; 4901 connection->request_role = HCI_ROLE_INVALID; 4902 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4903 return true; 4904 } 4905 #endif 4906 4907 #ifdef ENABLE_BLE 4908 switch (connection->le_con_parameter_update_state){ 4909 // response to L2CAP CON PARAMETER UPDATE REQUEST 4910 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4911 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4912 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4913 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4914 0x0000, 0xffff); 4915 return true; 4916 case CON_PARAMETER_UPDATE_REPLY: 4917 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4918 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4919 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4920 0x0000, 0xffff); 4921 return true; 4922 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4923 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4924 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4925 return true; 4926 default: 4927 break; 4928 } 4929 if (connection->le_phy_update_all_phys != 0xffu){ 4930 uint8_t all_phys = connection->le_phy_update_all_phys; 4931 connection->le_phy_update_all_phys = 0xff; 4932 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); 4933 return true; 4934 } 4935 #endif 4936 } 4937 return false; 4938 } 4939 4940 static void hci_run(void){ 4941 4942 bool done; 4943 4944 // send continuation fragments first, as they block the prepared packet buffer 4945 done = hci_run_acl_fragments(); 4946 if (done) return; 4947 4948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4949 // send host num completed packets next as they don't require num_cmd_packets > 0 4950 if (!hci_can_send_comand_packet_transport()) return; 4951 if (hci_stack->host_completed_packets){ 4952 hci_host_num_completed_packets(); 4953 return; 4954 } 4955 #endif 4956 4957 if (!hci_can_send_command_packet_now()) return; 4958 4959 // global/non-connection oriented commands 4960 4961 4962 #ifdef ENABLE_CLASSIC 4963 // general gap classic 4964 done = hci_run_general_gap_classic(); 4965 if (done) return; 4966 #endif 4967 4968 #ifdef ENABLE_BLE 4969 // general gap le 4970 done = hci_run_general_gap_le(); 4971 if (done) return; 4972 #endif 4973 4974 // send pending HCI commands 4975 done = hci_run_general_pending_commands(); 4976 if (done) return; 4977 4978 // stack state sub statemachines 4979 hci_connection_t * connection; 4980 switch (hci_stack->state){ 4981 case HCI_STATE_INITIALIZING: 4982 hci_initializing_run(); 4983 break; 4984 4985 case HCI_STATE_HALTING: 4986 4987 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4988 switch (hci_stack->substate){ 4989 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4990 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4991 4992 #ifdef ENABLE_BLE 4993 #ifdef ENABLE_LE_CENTRAL 4994 // free whitelist entries 4995 { 4996 btstack_linked_list_iterator_t lit; 4997 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4998 while (btstack_linked_list_iterator_has_next(&lit)){ 4999 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5000 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5001 btstack_memory_whitelist_entry_free(entry); 5002 } 5003 } 5004 #endif 5005 #endif 5006 // close all open connections 5007 connection = (hci_connection_t *) hci_stack->connections; 5008 if (connection){ 5009 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5010 if (!hci_can_send_command_packet_now()) return; 5011 5012 // check state 5013 if (connection->state == SENT_DISCONNECT) return; 5014 connection->state = SENT_DISCONNECT; 5015 5016 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5017 5018 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5019 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5020 5021 // ... which would be ignored anyway as we shutdown (free) the connection now 5022 hci_shutdown_connection(connection); 5023 5024 // finally, send the disconnect command 5025 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5026 return; 5027 } 5028 5029 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5030 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5031 log_info("HCI_STATE_HALTING: wait 50 ms"); 5032 hci_stack->substate = HCI_HALTING_W4_TIMER; 5033 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5034 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5035 btstack_run_loop_add_timer(&hci_stack->timeout); 5036 break; 5037 } 5038 5039 /* fall through */ 5040 5041 case HCI_HALTING_CLOSE: 5042 log_info("HCI_STATE_HALTING, calling off"); 5043 5044 // switch mode 5045 hci_power_control_off(); 5046 5047 log_info("HCI_STATE_HALTING, emitting state"); 5048 hci_emit_state(); 5049 log_info("HCI_STATE_HALTING, done"); 5050 break; 5051 5052 case HCI_HALTING_W4_TIMER: 5053 // keep waiting 5054 5055 break; 5056 default: 5057 break; 5058 } 5059 5060 break; 5061 5062 case HCI_STATE_FALLING_ASLEEP: 5063 switch(hci_stack->substate) { 5064 case HCI_FALLING_ASLEEP_DISCONNECT: 5065 log_info("HCI_STATE_FALLING_ASLEEP"); 5066 // close all open connections 5067 connection = (hci_connection_t *) hci_stack->connections; 5068 if (connection){ 5069 5070 // send disconnect 5071 if (!hci_can_send_command_packet_now()) return; 5072 5073 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5074 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5075 5076 // send disconnected event right away - causes higher layer connections to get closed, too. 5077 hci_shutdown_connection(connection); 5078 return; 5079 } 5080 5081 if (hci_classic_supported()){ 5082 // disable page and inquiry scan 5083 if (!hci_can_send_command_packet_now()) return; 5084 5085 log_info("HCI_STATE_HALTING, disabling inq scans"); 5086 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5087 5088 // continue in next sub state 5089 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5090 break; 5091 } 5092 5093 /* fall through */ 5094 5095 case HCI_FALLING_ASLEEP_COMPLETE: 5096 log_info("HCI_STATE_HALTING, calling sleep"); 5097 // switch mode 5098 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5099 hci_emit_state(); 5100 break; 5101 5102 default: 5103 break; 5104 } 5105 break; 5106 5107 default: 5108 break; 5109 } 5110 } 5111 5112 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5113 // house-keeping 5114 5115 #ifdef ENABLE_CLASSIC 5116 bd_addr_t addr; 5117 hci_connection_t * conn; 5118 #endif 5119 #ifdef ENABLE_LE_CENTRAL 5120 uint8_t initiator_filter_policy; 5121 #endif 5122 5123 uint16_t opcode = little_endian_read_16(packet, 0); 5124 switch (opcode) { 5125 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5126 hci_stack->loopback_mode = packet[3]; 5127 break; 5128 5129 #ifdef ENABLE_CLASSIC 5130 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5131 reverse_bd_addr(&packet[3], addr); 5132 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5133 5134 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5135 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5136 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5137 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5138 } 5139 5140 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5141 if (!conn) { 5142 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5143 if (!conn) { 5144 // notify client that alloc failed 5145 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5146 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5147 } 5148 conn->state = SEND_CREATE_CONNECTION; 5149 conn->role = HCI_ROLE_MASTER; 5150 } 5151 5152 conn->con_handle = HCI_CON_HANDLE_INVALID; 5153 conn->role = HCI_ROLE_INVALID; 5154 5155 log_info("conn state %u", conn->state); 5156 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5157 switch (conn->state) { 5158 // if connection active exists 5159 case OPEN: 5160 // and OPEN, emit connection complete command 5161 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5162 // packet not sent to controller 5163 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5164 case RECEIVED_DISCONNECTION_COMPLETE: 5165 // create connection triggered in disconnect complete event, let's do it now 5166 break; 5167 case SEND_CREATE_CONNECTION: 5168 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5169 break; 5170 default: 5171 // otherwise, just ignore as it is already in the open process 5172 // packet not sent to controller 5173 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5174 } 5175 conn->state = SENT_CREATE_CONNECTION; 5176 5177 // track outgoing connection 5178 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5179 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5180 break; 5181 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5182 if (hci_stack->link_key_db) { 5183 reverse_bd_addr(&packet[3], addr); 5184 hci_stack->link_key_db->delete_link_key(addr); 5185 } 5186 break; 5187 5188 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5189 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5190 // setup_synchronous_connection? Voice setting at offset 22 5191 // TODO: compare to current setting if sco connection already active 5192 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5193 break; 5194 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5195 // accept_synchronus_connection? Voice setting at offset 18 5196 // TODO: compare to current setting if sco connection already active 5197 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5198 break; 5199 #endif 5200 #endif 5201 5202 #ifdef ENABLE_BLE 5203 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5204 hci_stack->le_random_address_set = 1; 5205 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5206 break; 5207 #ifdef ENABLE_LE_PERIPHERAL 5208 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5209 hci_stack->le_advertisements_active = packet[3] != 0; 5210 break; 5211 #endif 5212 #ifdef ENABLE_LE_CENTRAL 5213 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5214 // white list used? 5215 initiator_filter_policy = packet[7]; 5216 switch (initiator_filter_policy) { 5217 case 0: 5218 // whitelist not used 5219 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5220 break; 5221 case 1: 5222 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5223 break; 5224 default: 5225 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5226 break; 5227 } 5228 // track outgoing connection 5229 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5230 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5231 break; 5232 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5233 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5234 break; 5235 #endif 5236 #endif 5237 default: 5238 break; 5239 } 5240 5241 hci_stack->num_cmd_packets--; 5242 5243 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5244 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5245 if (err != 0){ 5246 return ERROR_CODE_HARDWARE_FAILURE; 5247 } 5248 return ERROR_CODE_SUCCESS; 5249 } 5250 5251 // disconnect because of security block 5252 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5253 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5254 if (!connection) return; 5255 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5256 } 5257 5258 5259 // Configure Secure Simple Pairing 5260 5261 #ifdef ENABLE_CLASSIC 5262 5263 // enable will enable SSP during init 5264 void gap_ssp_set_enable(int enable){ 5265 hci_stack->ssp_enable = enable; 5266 } 5267 5268 static int hci_local_ssp_activated(void){ 5269 return gap_ssp_supported() && hci_stack->ssp_enable; 5270 } 5271 5272 // if set, BTstack will respond to io capability request using authentication requirement 5273 void gap_ssp_set_io_capability(int io_capability){ 5274 hci_stack->ssp_io_capability = io_capability; 5275 } 5276 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5277 hci_stack->ssp_authentication_requirement = authentication_requirement; 5278 } 5279 5280 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5281 void gap_ssp_set_auto_accept(int auto_accept){ 5282 hci_stack->ssp_auto_accept = auto_accept; 5283 } 5284 5285 void gap_secure_connections_enable(bool enable){ 5286 hci_stack->secure_connections_enable = enable; 5287 } 5288 5289 #endif 5290 5291 // va_list part of hci_send_cmd 5292 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5293 if (!hci_can_send_command_packet_now()){ 5294 log_error("hci_send_cmd called but cannot send packet now"); 5295 return ERROR_CODE_COMMAND_DISALLOWED; 5296 } 5297 5298 // for HCI INITIALIZATION 5299 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5300 hci_stack->last_cmd_opcode = cmd->opcode; 5301 5302 hci_reserve_packet_buffer(); 5303 uint8_t * packet = hci_stack->hci_packet_buffer; 5304 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5305 uint8_t status = hci_send_cmd_packet(packet, size); 5306 5307 // release packet buffer on error or for synchronous transport implementations 5308 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5309 hci_release_packet_buffer(); 5310 hci_emit_transport_packet_sent(); 5311 } 5312 5313 return status; 5314 } 5315 5316 /** 5317 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5318 */ 5319 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5320 va_list argptr; 5321 va_start(argptr, cmd); 5322 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5323 va_end(argptr); 5324 return status; 5325 } 5326 5327 // Create various non-HCI events. 5328 // TODO: generalize, use table similar to hci_create_command 5329 5330 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5331 // dump packet 5332 if (dump) { 5333 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5334 } 5335 5336 // dispatch to all event handlers 5337 btstack_linked_list_iterator_t it; 5338 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5339 while (btstack_linked_list_iterator_has_next(&it)){ 5340 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5341 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5342 } 5343 } 5344 5345 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5346 if (!hci_stack->acl_packet_handler) return; 5347 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5348 } 5349 5350 #ifdef ENABLE_CLASSIC 5351 static void hci_notify_if_sco_can_send_now(void){ 5352 // notify SCO sender if waiting 5353 if (!hci_stack->sco_waiting_for_can_send_now) return; 5354 if (hci_can_send_sco_packet_now()){ 5355 hci_stack->sco_waiting_for_can_send_now = 0; 5356 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5357 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5358 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5359 } 5360 } 5361 5362 // parsing end emitting has been merged to reduce code size 5363 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5364 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5365 5366 uint8_t * eir_data; 5367 ad_context_t context; 5368 const uint8_t * name; 5369 uint8_t name_len; 5370 5371 if (size < 3) return; 5372 5373 int event_type = hci_event_packet_get_type(packet); 5374 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5375 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5376 5377 switch (event_type){ 5378 case HCI_EVENT_INQUIRY_RESULT: 5379 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5380 if (size != (3 + (num_responses * 14))) return; 5381 break; 5382 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5383 if (size != 257) return; 5384 if (num_responses != 1) return; 5385 break; 5386 default: 5387 return; 5388 } 5389 5390 // event[1] is set at the end 5391 int i; 5392 for (i=0; i<num_responses;i++){ 5393 memset(event, 0, sizeof(event)); 5394 event[0] = GAP_EVENT_INQUIRY_RESULT; 5395 uint8_t event_size = 27; // if name is not set by EIR 5396 5397 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5398 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5399 (void)memcpy(&event[9], 5400 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5401 3); // class of device 5402 (void)memcpy(&event[12], 5403 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5404 2); // clock offset 5405 5406 switch (event_type){ 5407 case HCI_EVENT_INQUIRY_RESULT: 5408 // 14,15,16,17 = 0, size 18 5409 break; 5410 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5411 event[14] = 1; 5412 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5413 // 16,17 = 0, size 18 5414 break; 5415 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5416 event[14] = 1; 5417 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5418 // EIR packets only contain a single inquiry response 5419 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5420 name = NULL; 5421 // Iterate over EIR data 5422 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5423 uint8_t data_type = ad_iterator_get_data_type(&context); 5424 uint8_t data_size = ad_iterator_get_data_len(&context); 5425 const uint8_t * data = ad_iterator_get_data(&context); 5426 // Prefer Complete Local Name over Shortened Local Name 5427 switch (data_type){ 5428 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5429 if (name) continue; 5430 /* fall through */ 5431 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5432 name = data; 5433 name_len = data_size; 5434 break; 5435 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5436 if (data_size != 8) break; 5437 event[16] = 1; 5438 memcpy(&event[17], data, 8); 5439 break; 5440 default: 5441 break; 5442 } 5443 } 5444 if (name){ 5445 event[25] = 1; 5446 // truncate name if needed 5447 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5448 event[26] = len; 5449 (void)memcpy(&event[27], name, len); 5450 event_size += len; 5451 } 5452 break; 5453 default: 5454 return; 5455 } 5456 event[1] = event_size - 2; 5457 hci_emit_event(event, event_size, 1); 5458 } 5459 } 5460 #endif 5461 5462 void hci_emit_state(void){ 5463 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5464 uint8_t event[3]; 5465 event[0] = BTSTACK_EVENT_STATE; 5466 event[1] = sizeof(event) - 2u; 5467 event[2] = hci_stack->state; 5468 hci_emit_event(event, sizeof(event), 1); 5469 } 5470 5471 #ifdef ENABLE_CLASSIC 5472 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5473 uint8_t event[13]; 5474 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5475 event[1] = sizeof(event) - 2; 5476 event[2] = status; 5477 little_endian_store_16(event, 3, con_handle); 5478 reverse_bd_addr(address, &event[5]); 5479 event[11] = 1; // ACL connection 5480 event[12] = 0; // encryption disabled 5481 hci_emit_event(event, sizeof(event), 1); 5482 } 5483 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5484 if (disable_l2cap_timeouts) return; 5485 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5486 uint8_t event[4]; 5487 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5488 event[1] = sizeof(event) - 2; 5489 little_endian_store_16(event, 2, conn->con_handle); 5490 hci_emit_event(event, sizeof(event), 1); 5491 } 5492 #endif 5493 5494 #ifdef ENABLE_BLE 5495 #ifdef ENABLE_LE_CENTRAL 5496 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){ 5497 uint8_t event[21]; 5498 event[0] = HCI_EVENT_LE_META; 5499 event[1] = sizeof(event) - 2u; 5500 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5501 event[3] = status; 5502 little_endian_store_16(event, 4, con_handle); 5503 event[6] = 0; // TODO: role 5504 event[7] = address_type; 5505 reverse_bd_addr(address, &event[8]); 5506 little_endian_store_16(event, 14, 0); // interval 5507 little_endian_store_16(event, 16, 0); // latency 5508 little_endian_store_16(event, 18, 0); // supervision timeout 5509 event[20] = 0; // master clock accuracy 5510 hci_emit_event(event, sizeof(event), 1); 5511 } 5512 #endif 5513 #endif 5514 5515 static void hci_emit_transport_packet_sent(void){ 5516 // notify upper stack that it might be possible to send again 5517 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5518 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5519 } 5520 5521 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5522 uint8_t event[6]; 5523 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5524 event[1] = sizeof(event) - 2u; 5525 event[2] = 0; // status = OK 5526 little_endian_store_16(event, 3, con_handle); 5527 event[5] = reason; 5528 hci_emit_event(event, sizeof(event), 1); 5529 } 5530 5531 static void hci_emit_nr_connections_changed(void){ 5532 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5533 uint8_t event[3]; 5534 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5535 event[1] = sizeof(event) - 2u; 5536 event[2] = nr_hci_connections(); 5537 hci_emit_event(event, sizeof(event), 1); 5538 } 5539 5540 static void hci_emit_hci_open_failed(void){ 5541 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5542 uint8_t event[2]; 5543 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5544 event[1] = sizeof(event) - 2u; 5545 hci_emit_event(event, sizeof(event), 1); 5546 } 5547 5548 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5549 log_info("hci_emit_dedicated_bonding_result %u ", status); 5550 uint8_t event[9]; 5551 int pos = 0; 5552 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5553 event[pos++] = sizeof(event) - 2u; 5554 event[pos++] = status; 5555 reverse_bd_addr(address, &event[pos]); 5556 hci_emit_event(event, sizeof(event), 1); 5557 } 5558 5559 5560 #ifdef ENABLE_CLASSIC 5561 5562 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5563 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5564 uint8_t event[5]; 5565 int pos = 0; 5566 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5567 event[pos++] = sizeof(event) - 2; 5568 little_endian_store_16(event, 2, con_handle); 5569 pos += 2; 5570 event[pos++] = level; 5571 hci_emit_event(event, sizeof(event), 1); 5572 } 5573 5574 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5575 if (!connection) return LEVEL_0; 5576 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5577 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5578 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5579 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5580 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5581 // LEVEL 4 always requires 128 bit encrytion key size 5582 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5583 security_level = LEVEL_3; 5584 } 5585 return security_level; 5586 } 5587 5588 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5589 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5590 uint8_t event[3]; 5591 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5592 event[1] = sizeof(event) - 2; 5593 event[2] = enabled; 5594 hci_emit_event(event, sizeof(event), 1); 5595 } 5596 5597 // query if remote side supports eSCO 5598 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5599 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5600 if (!connection) return false; 5601 return (connection->remote_supported_features[0] & 1) != 0; 5602 } 5603 5604 static bool hci_ssp_supported(hci_connection_t * connection){ 5605 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5606 return (connection->bonding_flags & mask) == mask; 5607 } 5608 5609 // query if remote side supports SSP 5610 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5611 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5612 if (!connection) return false; 5613 return hci_ssp_supported(connection) ? 1 : 0; 5614 } 5615 5616 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5617 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5618 } 5619 5620 // GAP API 5621 /** 5622 * @bbrief enable/disable bonding. default is enabled 5623 * @praram enabled 5624 */ 5625 void gap_set_bondable_mode(int enable){ 5626 hci_stack->bondable = enable ? 1 : 0; 5627 } 5628 /** 5629 * @brief Get bondable mode. 5630 * @return 1 if bondable 5631 */ 5632 int gap_get_bondable_mode(void){ 5633 return hci_stack->bondable; 5634 } 5635 5636 /** 5637 * @brief map link keys to security levels 5638 */ 5639 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5640 switch (link_key_type){ 5641 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5642 return LEVEL_4; 5643 case COMBINATION_KEY: 5644 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5645 return LEVEL_3; 5646 default: 5647 return LEVEL_2; 5648 } 5649 } 5650 5651 /** 5652 * @brief map link keys to secure connection yes/no 5653 */ 5654 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5655 switch (link_key_type){ 5656 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5657 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5658 return 1; 5659 default: 5660 return 0; 5661 } 5662 } 5663 5664 /** 5665 * @brief map link keys to authenticated 5666 */ 5667 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5668 switch (link_key_type){ 5669 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5670 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5671 return 1; 5672 default: 5673 return 0; 5674 } 5675 } 5676 5677 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5678 log_info("gap_mitm_protection_required_for_security_level %u", level); 5679 return level > LEVEL_2; 5680 } 5681 5682 /** 5683 * @brief get current security level 5684 */ 5685 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5686 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5687 if (!connection) return LEVEL_0; 5688 return gap_security_level_for_connection(connection); 5689 } 5690 5691 /** 5692 * @brief request connection to device to 5693 * @result GAP_AUTHENTICATION_RESULT 5694 */ 5695 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5696 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5697 if (!connection){ 5698 hci_emit_security_level(con_handle, LEVEL_0); 5699 return; 5700 } 5701 5702 btstack_assert(hci_is_le_connection(connection) == false); 5703 5704 // 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) 5705 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5706 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5707 requested_level = LEVEL_4; 5708 } 5709 5710 gap_security_level_t current_level = gap_security_level(con_handle); 5711 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5712 requested_level, connection->requested_security_level, current_level); 5713 5714 // authentication active if authentication request was sent or planned level > 0 5715 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5716 if (authentication_active){ 5717 // authentication already active 5718 if (connection->requested_security_level < requested_level){ 5719 // increase requested level as new level is higher 5720 // TODO: handle re-authentication when done 5721 connection->requested_security_level = requested_level; 5722 } 5723 } else { 5724 // no request active, notify if security sufficient 5725 if (requested_level <= current_level){ 5726 hci_emit_security_level(con_handle, current_level); 5727 return; 5728 } 5729 5730 // store request 5731 connection->requested_security_level = requested_level; 5732 5733 // start to authenticate connection 5734 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5735 hci_run(); 5736 } 5737 } 5738 5739 /** 5740 * @brief start dedicated bonding with device. disconnect after bonding 5741 * @param device 5742 * @param request MITM protection 5743 * @result GAP_DEDICATED_BONDING_COMPLETE 5744 */ 5745 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5746 5747 // create connection state machine 5748 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5749 5750 if (!connection){ 5751 return BTSTACK_MEMORY_ALLOC_FAILED; 5752 } 5753 5754 // delete linkn key 5755 gap_drop_link_key_for_bd_addr(device); 5756 5757 // configure LEVEL_2/3, dedicated bonding 5758 connection->state = SEND_CREATE_CONNECTION; 5759 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5760 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5761 connection->bonding_flags = BONDING_DEDICATED; 5762 5763 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5764 5765 // handle: connnection failure (connection complete != ok) 5766 // handle: authentication failure 5767 // handle: disconnect on done 5768 5769 hci_run(); 5770 5771 return 0; 5772 } 5773 5774 void gap_set_local_name(const char * local_name){ 5775 hci_stack->local_name = local_name; 5776 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5777 // also update EIR if not set by user 5778 if (hci_stack->eir_data == NULL){ 5779 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5780 } 5781 hci_run(); 5782 } 5783 #endif 5784 5785 5786 #ifdef ENABLE_BLE 5787 5788 #ifdef ENABLE_LE_CENTRAL 5789 void gap_start_scan(void){ 5790 hci_stack->le_scanning_enabled = true; 5791 hci_run(); 5792 } 5793 5794 void gap_stop_scan(void){ 5795 hci_stack->le_scanning_enabled = false; 5796 hci_run(); 5797 } 5798 5799 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5800 hci_stack->le_scan_type = scan_type; 5801 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5802 hci_stack->le_scan_interval = scan_interval; 5803 hci_stack->le_scan_window = scan_window; 5804 hci_stack->le_scanning_param_update = true; 5805 hci_run(); 5806 } 5807 5808 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5809 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5810 } 5811 5812 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5813 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5814 if (!conn){ 5815 // disallow if le connection is already outgoing 5816 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5817 log_error("le connection already active"); 5818 return ERROR_CODE_COMMAND_DISALLOWED; 5819 } 5820 5821 log_info("gap_connect: no connection exists yet, creating context"); 5822 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5823 if (!conn){ 5824 // notify client that alloc failed 5825 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5826 log_info("gap_connect: failed to alloc hci_connection_t"); 5827 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5828 } 5829 5830 // set le connecting state 5831 if (hci_is_le_connection_type(addr_type)){ 5832 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5833 } 5834 5835 conn->state = SEND_CREATE_CONNECTION; 5836 log_info("gap_connect: send create connection next"); 5837 hci_run(); 5838 return ERROR_CODE_SUCCESS; 5839 } 5840 5841 if (!hci_is_le_connection(conn) || 5842 (conn->state == SEND_CREATE_CONNECTION) || 5843 (conn->state == SENT_CREATE_CONNECTION)) { 5844 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5845 log_error("gap_connect: classic connection or connect is already being created"); 5846 return GATT_CLIENT_IN_WRONG_STATE; 5847 } 5848 5849 // check if connection was just disconnected 5850 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5851 log_info("gap_connect: send create connection (again)"); 5852 conn->state = SEND_CREATE_CONNECTION; 5853 hci_run(); 5854 return ERROR_CODE_SUCCESS; 5855 } 5856 5857 log_info("gap_connect: context exists with state %u", conn->state); 5858 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5859 hci_run(); 5860 return ERROR_CODE_SUCCESS; 5861 } 5862 5863 // @assumption: only a single outgoing LE Connection exists 5864 static hci_connection_t * gap_get_outgoing_connection(void){ 5865 btstack_linked_item_t *it; 5866 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5867 hci_connection_t * conn = (hci_connection_t *) it; 5868 if (!hci_is_le_connection(conn)) continue; 5869 switch (conn->state){ 5870 case SEND_CREATE_CONNECTION: 5871 case SENT_CREATE_CONNECTION: 5872 case SENT_CANCEL_CONNECTION: 5873 return conn; 5874 default: 5875 break; 5876 }; 5877 } 5878 return NULL; 5879 } 5880 5881 uint8_t gap_connect_cancel(void){ 5882 hci_connection_t * conn = gap_get_outgoing_connection(); 5883 if (!conn) return 0; 5884 switch (conn->state){ 5885 case SEND_CREATE_CONNECTION: 5886 // skip sending create connection and emit event instead 5887 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5888 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5889 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5890 btstack_memory_hci_connection_free( conn ); 5891 break; 5892 case SENT_CREATE_CONNECTION: 5893 // request to send cancel connection 5894 conn->state = SEND_CANCEL_CONNECTION; 5895 hci_run(); 5896 break; 5897 default: 5898 break; 5899 } 5900 return 0; 5901 } 5902 #endif 5903 5904 #ifdef ENABLE_LE_CENTRAL 5905 /** 5906 * @brief Set connection parameters for outgoing connections 5907 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5908 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5909 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5910 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5911 * @param conn_latency, default: 4 5912 * @param supervision_timeout (unit: 10ms), default: 720 ms 5913 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5914 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5915 */ 5916 5917 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5918 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5919 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5920 hci_stack->le_connection_scan_interval = conn_scan_interval; 5921 hci_stack->le_connection_scan_window = conn_scan_window; 5922 hci_stack->le_connection_interval_min = conn_interval_min; 5923 hci_stack->le_connection_interval_max = conn_interval_max; 5924 hci_stack->le_connection_latency = conn_latency; 5925 hci_stack->le_supervision_timeout = supervision_timeout; 5926 hci_stack->le_minimum_ce_length = min_ce_length; 5927 hci_stack->le_maximum_ce_length = max_ce_length; 5928 } 5929 #endif 5930 5931 /** 5932 * @brief Updates the connection parameters for a given LE connection 5933 * @param handle 5934 * @param conn_interval_min (unit: 1.25ms) 5935 * @param conn_interval_max (unit: 1.25ms) 5936 * @param conn_latency 5937 * @param supervision_timeout (unit: 10ms) 5938 * @returns 0 if ok 5939 */ 5940 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5941 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5942 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5943 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5944 connection->le_conn_interval_min = conn_interval_min; 5945 connection->le_conn_interval_max = conn_interval_max; 5946 connection->le_conn_latency = conn_latency; 5947 connection->le_supervision_timeout = supervision_timeout; 5948 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5949 hci_run(); 5950 return 0; 5951 } 5952 5953 /** 5954 * @brief Request an update of the connection parameter for a given LE connection 5955 * @param handle 5956 * @param conn_interval_min (unit: 1.25ms) 5957 * @param conn_interval_max (unit: 1.25ms) 5958 * @param conn_latency 5959 * @param supervision_timeout (unit: 10ms) 5960 * @returns 0 if ok 5961 */ 5962 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5963 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5964 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5965 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5966 connection->le_conn_interval_min = conn_interval_min; 5967 connection->le_conn_interval_max = conn_interval_max; 5968 connection->le_conn_latency = conn_latency; 5969 connection->le_supervision_timeout = supervision_timeout; 5970 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5971 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5972 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5973 return 0; 5974 } 5975 5976 #ifdef ENABLE_LE_PERIPHERAL 5977 5978 /** 5979 * @brief Set Advertisement Data 5980 * @param advertising_data_length 5981 * @param advertising_data (max 31 octets) 5982 * @note data is not copied, pointer has to stay valid 5983 */ 5984 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5985 hci_stack->le_advertisements_data_len = advertising_data_length; 5986 hci_stack->le_advertisements_data = advertising_data; 5987 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5988 hci_run(); 5989 } 5990 5991 /** 5992 * @brief Set Scan Response Data 5993 * @param advertising_data_length 5994 * @param advertising_data (max 31 octets) 5995 * @note data is not copied, pointer has to stay valid 5996 */ 5997 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5998 hci_stack->le_scan_response_data_len = scan_response_data_length; 5999 hci_stack->le_scan_response_data = scan_response_data; 6000 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6001 hci_run(); 6002 } 6003 6004 /** 6005 * @brief Set Advertisement Parameters 6006 * @param adv_int_min 6007 * @param adv_int_max 6008 * @param adv_type 6009 * @param direct_address_type 6010 * @param direct_address 6011 * @param channel_map 6012 * @param filter_policy 6013 * 6014 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6015 */ 6016 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6017 uint8_t direct_address_typ, bd_addr_t direct_address, 6018 uint8_t channel_map, uint8_t filter_policy) { 6019 6020 hci_stack->le_advertisements_interval_min = adv_int_min; 6021 hci_stack->le_advertisements_interval_max = adv_int_max; 6022 hci_stack->le_advertisements_type = adv_type; 6023 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6024 hci_stack->le_advertisements_channel_map = channel_map; 6025 hci_stack->le_advertisements_filter_policy = filter_policy; 6026 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6027 6); 6028 6029 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6030 hci_run(); 6031 } 6032 6033 /** 6034 * @brief Enable/Disable Advertisements 6035 * @param enabled 6036 */ 6037 void gap_advertisements_enable(int enabled){ 6038 hci_stack->le_advertisements_enabled = enabled != 0; 6039 hci_update_advertisements_enabled_for_current_roles(); 6040 hci_run(); 6041 } 6042 6043 #endif 6044 6045 void hci_le_set_own_address_type(uint8_t own_address_type){ 6046 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6047 if (own_address_type == hci_stack->le_own_addr_type) return; 6048 hci_stack->le_own_addr_type = own_address_type; 6049 6050 #ifdef ENABLE_LE_PERIPHERAL 6051 // update advertisement parameters, too 6052 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6053 hci_run(); 6054 #endif 6055 #ifdef ENABLE_LE_CENTRAL 6056 // note: we don't update scan parameters or modify ongoing connection attempts 6057 #endif 6058 } 6059 6060 #endif 6061 6062 uint8_t gap_disconnect(hci_con_handle_t handle){ 6063 hci_connection_t * conn = hci_connection_for_handle(handle); 6064 if (!conn){ 6065 hci_emit_disconnection_complete(handle, 0); 6066 return 0; 6067 } 6068 // ignore if already disconnected 6069 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6070 return 0; 6071 } 6072 conn->state = SEND_DISCONNECT; 6073 hci_run(); 6074 return 0; 6075 } 6076 6077 int gap_read_rssi(hci_con_handle_t con_handle){ 6078 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6079 if (hci_connection == NULL) return 0; 6080 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6081 hci_run(); 6082 return 1; 6083 } 6084 6085 /** 6086 * @brief Get connection type 6087 * @param con_handle 6088 * @result connection_type 6089 */ 6090 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6091 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6092 if (!conn) return GAP_CONNECTION_INVALID; 6093 switch (conn->address_type){ 6094 case BD_ADDR_TYPE_LE_PUBLIC: 6095 case BD_ADDR_TYPE_LE_RANDOM: 6096 return GAP_CONNECTION_LE; 6097 case BD_ADDR_TYPE_SCO: 6098 return GAP_CONNECTION_SCO; 6099 case BD_ADDR_TYPE_ACL: 6100 return GAP_CONNECTION_ACL; 6101 default: 6102 return GAP_CONNECTION_INVALID; 6103 } 6104 } 6105 6106 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6107 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6108 if (!conn) return HCI_ROLE_INVALID; 6109 return (hci_role_t) conn->role; 6110 } 6111 6112 6113 #ifdef ENABLE_CLASSIC 6114 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6115 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6116 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6117 conn->request_role = role; 6118 hci_run(); 6119 return ERROR_CODE_SUCCESS; 6120 } 6121 #endif 6122 6123 #ifdef ENABLE_BLE 6124 6125 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){ 6126 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6127 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6128 6129 conn->le_phy_update_all_phys = all_phys; 6130 conn->le_phy_update_tx_phys = tx_phys; 6131 conn->le_phy_update_rx_phys = rx_phys; 6132 conn->le_phy_update_phy_options = phy_options; 6133 6134 hci_run(); 6135 6136 return 0; 6137 } 6138 6139 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6140 // check if already in list 6141 btstack_linked_list_iterator_t it; 6142 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6143 while (btstack_linked_list_iterator_has_next(&it)) { 6144 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6145 if (entry->address_type != address_type) { 6146 continue; 6147 } 6148 if (memcmp(entry->address, address, 6) != 0) { 6149 continue; 6150 } 6151 // disallow if already scheduled to add 6152 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6153 return ERROR_CODE_COMMAND_DISALLOWED; 6154 } 6155 // still on controller, but scheduled to remove -> re-add 6156 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6157 return ERROR_CODE_SUCCESS; 6158 } 6159 // alloc and add to list 6160 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6161 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6162 entry->address_type = address_type; 6163 (void)memcpy(entry->address, address, 6); 6164 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6165 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6166 return ERROR_CODE_SUCCESS; 6167 } 6168 6169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6170 btstack_linked_list_iterator_t it; 6171 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6172 while (btstack_linked_list_iterator_has_next(&it)){ 6173 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6174 if (entry->address_type != address_type) { 6175 continue; 6176 } 6177 if (memcmp(entry->address, address, 6) != 0) { 6178 continue; 6179 } 6180 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6181 // remove from controller if already present 6182 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6183 } else { 6184 // directly remove entry from whitelist 6185 btstack_linked_list_iterator_remove(&it); 6186 btstack_memory_whitelist_entry_free(entry); 6187 } 6188 return ERROR_CODE_SUCCESS; 6189 } 6190 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6191 } 6192 6193 static void hci_whitelist_clear(void){ 6194 btstack_linked_list_iterator_t it; 6195 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6196 while (btstack_linked_list_iterator_has_next(&it)){ 6197 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6198 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6199 // remove from controller if already present 6200 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6201 continue; 6202 } 6203 // directly remove entry from whitelist 6204 btstack_linked_list_iterator_remove(&it); 6205 btstack_memory_whitelist_entry_free(entry); 6206 } 6207 } 6208 6209 /** 6210 * @brief Clear Whitelist 6211 * @returns 0 if ok 6212 */ 6213 uint8_t gap_whitelist_clear(void){ 6214 hci_whitelist_clear(); 6215 hci_run(); 6216 return ERROR_CODE_SUCCESS; 6217 } 6218 6219 /** 6220 * @brief Add Device to Whitelist 6221 * @param address_typ 6222 * @param address 6223 * @returns 0 if ok 6224 */ 6225 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6226 uint8_t status = hci_whitelist_add(address_type, address); 6227 if (status){ 6228 return status; 6229 } 6230 hci_run(); 6231 return ERROR_CODE_SUCCESS; 6232 } 6233 6234 /** 6235 * @brief Remove Device from Whitelist 6236 * @param address_typ 6237 * @param address 6238 * @returns 0 if ok 6239 */ 6240 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6241 uint8_t status = hci_whitelist_remove(address_type, address); 6242 if (status){ 6243 return status; 6244 } 6245 hci_run(); 6246 return ERROR_CODE_SUCCESS; 6247 } 6248 6249 #ifdef ENABLE_LE_CENTRAL 6250 /** 6251 * @brief Connect with Whitelist 6252 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6253 * @returns - if ok 6254 */ 6255 uint8_t gap_connect_with_whitelist(void){ 6256 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6257 return ERROR_CODE_COMMAND_DISALLOWED; 6258 } 6259 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6260 hci_run(); 6261 return ERROR_CODE_SUCCESS; 6262 } 6263 6264 /** 6265 * @brief Auto Connection Establishment - Start Connecting to device 6266 * @param address_typ 6267 * @param address 6268 * @returns 0 if ok 6269 */ 6270 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6271 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6272 return ERROR_CODE_COMMAND_DISALLOWED; 6273 } 6274 6275 uint8_t status = hci_whitelist_add(address_type, address); 6276 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6277 return status; 6278 } 6279 6280 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6281 6282 hci_run(); 6283 return ERROR_CODE_SUCCESS; 6284 } 6285 6286 /** 6287 * @brief Auto Connection Establishment - Stop Connecting to device 6288 * @param address_typ 6289 * @param address 6290 * @returns 0 if ok 6291 */ 6292 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6293 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6294 return ERROR_CODE_COMMAND_DISALLOWED; 6295 } 6296 6297 hci_whitelist_remove(address_type, address); 6298 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6299 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6300 } 6301 hci_run(); 6302 return 0; 6303 } 6304 6305 /** 6306 * @brief Auto Connection Establishment - Stop everything 6307 * @note Convenience function to stop all active auto connection attempts 6308 */ 6309 uint8_t gap_auto_connection_stop_all(void){ 6310 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6311 return ERROR_CODE_COMMAND_DISALLOWED; 6312 } 6313 hci_whitelist_clear(); 6314 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6315 hci_run(); 6316 return ERROR_CODE_SUCCESS; 6317 } 6318 6319 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6320 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6321 if (!conn) return 0; 6322 return conn->le_connection_interval; 6323 } 6324 #endif 6325 #endif 6326 6327 #ifdef ENABLE_CLASSIC 6328 /** 6329 * @brief Set Extended Inquiry Response data 6330 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6331 * @note has to be done before stack starts up 6332 */ 6333 void gap_set_extended_inquiry_response(const uint8_t * data){ 6334 hci_stack->eir_data = data; 6335 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6336 hci_run(); 6337 } 6338 6339 /** 6340 * @brief Start GAP Classic Inquiry 6341 * @param duration in 1.28s units 6342 * @return 0 if ok 6343 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6344 */ 6345 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6346 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6347 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6348 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6349 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6350 } 6351 hci_stack->inquiry_state = duration_in_1280ms_units; 6352 hci_run(); 6353 return 0; 6354 } 6355 6356 /** 6357 * @brief Stop GAP Classic Inquiry 6358 * @returns 0 if ok 6359 */ 6360 int gap_inquiry_stop(void){ 6361 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6362 // emit inquiry complete event, before it even started 6363 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6364 hci_emit_event(event, sizeof(event), 1); 6365 return 0; 6366 } 6367 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6368 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6369 hci_run(); 6370 return 0; 6371 } 6372 6373 void gap_inquiry_set_lap(uint32_t lap){ 6374 hci_stack->inquiry_lap = lap; 6375 } 6376 6377 6378 /** 6379 * @brief Remote Name Request 6380 * @param addr 6381 * @param page_scan_repetition_mode 6382 * @param clock_offset only used when bit 15 is set 6383 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6384 */ 6385 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6386 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6387 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6388 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6389 hci_stack->remote_name_clock_offset = clock_offset; 6390 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6391 hci_run(); 6392 return 0; 6393 } 6394 6395 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6396 hci_stack->gap_pairing_state = state; 6397 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6398 hci_run(); 6399 return 0; 6400 } 6401 6402 /** 6403 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6404 * @param addr 6405 * @param pin_data 6406 * @param pin_len 6407 * @return 0 if ok 6408 */ 6409 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6410 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6411 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6412 hci_stack->gap_pairing_pin_len = pin_len; 6413 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6414 } 6415 6416 /** 6417 * @brief Legacy Pairing Pin Code Response 6418 * @param addr 6419 * @param pin 6420 * @return 0 if ok 6421 */ 6422 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6423 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6424 } 6425 6426 /** 6427 * @brief Abort Legacy Pairing 6428 * @param addr 6429 * @param pin 6430 * @return 0 if ok 6431 */ 6432 int gap_pin_code_negative(bd_addr_t addr){ 6433 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6434 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6435 } 6436 6437 /** 6438 * @brief SSP Passkey Response 6439 * @param addr 6440 * @param passkey 6441 * @return 0 if ok 6442 */ 6443 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6444 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6445 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6446 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6447 } 6448 6449 /** 6450 * @brief Abort SSP Passkey Entry/Pairing 6451 * @param addr 6452 * @param pin 6453 * @return 0 if ok 6454 */ 6455 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6456 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6457 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6458 } 6459 6460 /** 6461 * @brief Accept SSP Numeric Comparison 6462 * @param addr 6463 * @param passkey 6464 * @return 0 if ok 6465 */ 6466 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6467 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6469 } 6470 6471 /** 6472 * @brief Abort SSP Numeric Comparison/Pairing 6473 * @param addr 6474 * @param pin 6475 * @return 0 if ok 6476 */ 6477 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6478 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6479 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6480 } 6481 6482 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6483 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6484 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6485 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6486 connectionSetAuthenticationFlags(conn, flag); 6487 hci_run(); 6488 return ERROR_CODE_SUCCESS; 6489 } 6490 #endif 6491 6492 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6493 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6494 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6495 } 6496 6497 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6498 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6499 } 6500 #endif 6501 6502 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6503 /** 6504 * @brief Report Remote OOB Data 6505 * @param bd_addr 6506 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6507 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6508 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6509 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6510 */ 6511 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){ 6512 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6513 if (connection == NULL) { 6514 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6515 } 6516 connection->classic_oob_c_192 = c_192; 6517 connection->classic_oob_r_192 = r_192; 6518 6519 // ignore P-256 if not supported by us 6520 if (hci_stack->secure_connections_active){ 6521 connection->classic_oob_c_256 = c_256; 6522 connection->classic_oob_r_256 = r_256; 6523 } 6524 6525 return ERROR_CODE_SUCCESS; 6526 } 6527 /** 6528 * @brief Generate new OOB data 6529 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6530 */ 6531 void gap_ssp_generate_oob_data(void){ 6532 hci_stack->classic_read_local_oob_data = true; 6533 hci_run(); 6534 } 6535 6536 #endif 6537 6538 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6539 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6540 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6541 if (connection == NULL) { 6542 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6543 } 6544 6545 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6546 connection->link_key_type = type; 6547 6548 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6549 } 6550 6551 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6552 /** 6553 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6554 * @param inquiry_mode see bluetooth_defines.h 6555 */ 6556 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6557 hci_stack->inquiry_mode = inquiry_mode; 6558 } 6559 6560 /** 6561 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6562 */ 6563 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6564 hci_stack->sco_voice_setting = voice_setting; 6565 } 6566 6567 /** 6568 * @brief Get SCO Voice Setting 6569 * @return current voice setting 6570 */ 6571 uint16_t hci_get_sco_voice_setting(void){ 6572 return hci_stack->sco_voice_setting; 6573 } 6574 6575 static int hci_have_usb_transport(void){ 6576 if (!hci_stack->hci_transport) return 0; 6577 const char * transport_name = hci_stack->hci_transport->name; 6578 if (!transport_name) return 0; 6579 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6580 } 6581 6582 /** @brief Get SCO packet length for current SCO Voice setting 6583 * @note Using SCO packets of the exact length is required for USB transfer 6584 * @return Length of SCO packets in bytes (not audio frames) 6585 */ 6586 uint16_t hci_get_sco_packet_length(void){ 6587 uint16_t sco_packet_length = 0; 6588 6589 #ifdef ENABLE_SCO_OVER_HCI 6590 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6591 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6592 6593 if (hci_have_usb_transport()){ 6594 // see Core Spec for H2 USB Transfer. 6595 // 3 byte SCO header + 24 bytes per connection 6596 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6597 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6598 } else { 6599 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6600 sco_packet_length = 3 + 60 * multiplier; 6601 // assert that it still fits inside an SCO buffer 6602 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6603 sco_packet_length = 3 + 60; 6604 } 6605 } 6606 #endif 6607 6608 #ifdef HAVE_SCO_TRANSPORT 6609 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6610 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6611 sco_packet_length = 3 + 60 * multiplier; 6612 #endif 6613 return sco_packet_length; 6614 } 6615 6616 /** 6617 * @brief Sets the master/slave policy 6618 * @param policy (0: attempt to become master, 1: let connecting device decide) 6619 */ 6620 void hci_set_master_slave_policy(uint8_t policy){ 6621 hci_stack->master_slave_policy = policy; 6622 } 6623 6624 #endif 6625 6626 HCI_STATE hci_get_state(void){ 6627 return hci_stack->state; 6628 } 6629 6630 #ifdef ENABLE_CLASSIC 6631 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6632 hci_stack->gap_classic_accept_callback = accept_callback; 6633 } 6634 #endif 6635 6636 /** 6637 * @brief Set callback for Bluetooth Hardware Error 6638 */ 6639 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6640 hci_stack->hardware_error_callback = fn; 6641 } 6642 6643 void hci_disconnect_all(void){ 6644 btstack_linked_list_iterator_t it; 6645 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6646 while (btstack_linked_list_iterator_has_next(&it)){ 6647 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6648 if (con->state == SENT_DISCONNECT) continue; 6649 con->state = SEND_DISCONNECT; 6650 } 6651 hci_run(); 6652 } 6653 6654 uint16_t hci_get_manufacturer(void){ 6655 return hci_stack->manufacturer; 6656 } 6657 6658 #ifdef ENABLE_BLE 6659 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6660 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6661 if (!hci_con) return NULL; 6662 return &hci_con->sm_connection; 6663 } 6664 6665 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6666 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6667 #endif 6668 6669 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6670 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6671 if (hci_connection == NULL) return 0; 6672 if (hci_is_le_connection(hci_connection)){ 6673 #ifdef ENABLE_BLE 6674 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6675 if (sm_conn->sm_connection_encrypted) { 6676 return sm_conn->sm_actual_encryption_key_size; 6677 } 6678 #endif 6679 } else { 6680 #ifdef ENABLE_CLASSIC 6681 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6682 return hci_connection->encryption_key_size; 6683 } 6684 #endif 6685 } 6686 return 0; 6687 } 6688 6689 int gap_authenticated(hci_con_handle_t con_handle){ 6690 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6691 if (hci_connection == NULL) return 0; 6692 6693 switch (hci_connection->address_type){ 6694 #ifdef ENABLE_BLE 6695 case BD_ADDR_TYPE_LE_PUBLIC: 6696 case BD_ADDR_TYPE_LE_RANDOM: 6697 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6698 return hci_connection->sm_connection.sm_connection_authenticated; 6699 #endif 6700 #ifdef ENABLE_CLASSIC 6701 case BD_ADDR_TYPE_SCO: 6702 case BD_ADDR_TYPE_ACL: 6703 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6704 #endif 6705 default: 6706 return 0; 6707 } 6708 } 6709 6710 int gap_secure_connection(hci_con_handle_t con_handle){ 6711 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6712 if (hci_connection == NULL) return 0; 6713 6714 switch (hci_connection->address_type){ 6715 #ifdef ENABLE_BLE 6716 case BD_ADDR_TYPE_LE_PUBLIC: 6717 case BD_ADDR_TYPE_LE_RANDOM: 6718 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6719 return hci_connection->sm_connection.sm_connection_sc; 6720 #endif 6721 #ifdef ENABLE_CLASSIC 6722 case BD_ADDR_TYPE_SCO: 6723 case BD_ADDR_TYPE_ACL: 6724 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6725 #endif 6726 default: 6727 return 0; 6728 } 6729 } 6730 6731 bool gap_bonded(hci_con_handle_t con_handle){ 6732 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6733 if (hci_connection == NULL) return 0; 6734 6735 #ifdef ENABLE_CLASSIC 6736 link_key_t link_key; 6737 link_key_type_t link_key_type; 6738 #endif 6739 switch (hci_connection->address_type){ 6740 #ifdef ENABLE_BLE 6741 case BD_ADDR_TYPE_LE_PUBLIC: 6742 case BD_ADDR_TYPE_LE_RANDOM: 6743 return hci_connection->sm_connection.sm_le_db_index >= 0; 6744 #endif 6745 #ifdef ENABLE_CLASSIC 6746 case BD_ADDR_TYPE_SCO: 6747 case BD_ADDR_TYPE_ACL: 6748 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6749 #endif 6750 default: 6751 return false; 6752 } 6753 } 6754 6755 #ifdef ENABLE_BLE 6756 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6757 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6758 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6759 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6760 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6761 return sm_conn->sm_connection_authorization_state; 6762 } 6763 #endif 6764 6765 #ifdef ENABLE_CLASSIC 6766 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){ 6767 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6768 if (!conn) return GAP_CONNECTION_INVALID; 6769 conn->sniff_min_interval = sniff_min_interval; 6770 conn->sniff_max_interval = sniff_max_interval; 6771 conn->sniff_attempt = sniff_attempt; 6772 conn->sniff_timeout = sniff_timeout; 6773 hci_run(); 6774 return 0; 6775 } 6776 6777 /** 6778 * @brief Exit Sniff mode 6779 * @param con_handle 6780 @ @return 0 if ok 6781 */ 6782 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6783 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6784 if (!conn) return GAP_CONNECTION_INVALID; 6785 conn->sniff_min_interval = 0xffff; 6786 hci_run(); 6787 return 0; 6788 } 6789 6790 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){ 6791 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6792 if (!conn) return GAP_CONNECTION_INVALID; 6793 conn->sniff_subrating_max_latency = max_latency; 6794 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6795 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6796 hci_run(); 6797 return ERROR_CODE_SUCCESS; 6798 } 6799 6800 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){ 6801 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6802 if (!conn) return GAP_CONNECTION_INVALID; 6803 conn->qos_service_type = service_type; 6804 conn->qos_token_rate = token_rate; 6805 conn->qos_peak_bandwidth = peak_bandwidth; 6806 conn->qos_latency = latency; 6807 conn->qos_delay_variation = delay_variation; 6808 hci_run(); 6809 return ERROR_CODE_SUCCESS; 6810 } 6811 6812 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6813 hci_stack->new_page_scan_interval = page_scan_interval; 6814 hci_stack->new_page_scan_window = page_scan_window; 6815 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6816 hci_run(); 6817 } 6818 6819 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6820 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6821 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6822 hci_run(); 6823 } 6824 6825 #endif 6826 6827 void hci_halting_defer(void){ 6828 if (hci_stack->state != HCI_STATE_HALTING) return; 6829 switch (hci_stack->substate){ 6830 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6831 case HCI_HALTING_CLOSE: 6832 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6833 break; 6834 default: 6835 break; 6836 } 6837 } 6838 6839 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6840 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6841 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6842 if (le_device_db_index >= le_device_db_max_count()) return; 6843 uint8_t offset = le_device_db_index >> 3; 6844 uint8_t mask = 1 << (le_device_db_index & 7); 6845 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6846 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6847 // note: go back to remove entries, otherwise, a remove + add will skip the add 6848 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6849 } 6850 } 6851 6852 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6853 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6854 if (le_device_db_index >= le_device_db_max_count()) return; 6855 uint8_t offset = le_device_db_index >> 3; 6856 uint8_t mask = 1 << (le_device_db_index & 7); 6857 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6858 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6859 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6860 } 6861 } 6862 6863 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6864 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6865 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6866 } 6867 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6868 // restart le resolving list update 6869 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6870 } 6871 return ERROR_CODE_SUCCESS; 6872 } 6873 #endif 6874 6875 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6876 void hci_setup_test_connections_fuzz(void){ 6877 hci_connection_t * conn; 6878 6879 // default address: 66:55:44:33:00:01 6880 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6881 6882 // setup Controller info 6883 hci_stack->num_cmd_packets = 255; 6884 hci_stack->acl_packets_total_num = 255; 6885 6886 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6887 addr[5] = 0x01; 6888 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6889 conn->con_handle = addr[5]; 6890 conn->role = HCI_ROLE_SLAVE; 6891 conn->state = RECEIVED_CONNECTION_REQUEST; 6892 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6893 6894 // setup incoming Classic SCO connection with con handle 0x0002 6895 addr[5] = 0x02; 6896 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6897 conn->con_handle = addr[5]; 6898 conn->role = HCI_ROLE_SLAVE; 6899 conn->state = RECEIVED_CONNECTION_REQUEST; 6900 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6901 6902 // setup ready Classic ACL connection with con handle 0x0003 6903 addr[5] = 0x03; 6904 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6905 conn->con_handle = addr[5]; 6906 conn->role = HCI_ROLE_SLAVE; 6907 conn->state = OPEN; 6908 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6909 6910 // setup ready Classic SCO connection with con handle 0x0004 6911 addr[5] = 0x04; 6912 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6913 conn->con_handle = addr[5]; 6914 conn->role = HCI_ROLE_SLAVE; 6915 conn->state = OPEN; 6916 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6917 6918 // setup ready LE ACL connection with con handle 0x005 and public address 6919 addr[5] = 0x05; 6920 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6921 conn->con_handle = addr[5]; 6922 conn->role = HCI_ROLE_SLAVE; 6923 conn->state = OPEN; 6924 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6925 conn->sm_connection.sm_connection_encrypted = 1; 6926 } 6927 6928 void hci_free_connections_fuzz(void){ 6929 btstack_linked_list_iterator_t it; 6930 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6931 while (btstack_linked_list_iterator_has_next(&it)){ 6932 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6933 btstack_linked_list_iterator_remove(&it); 6934 btstack_memory_hci_connection_free(con); 6935 } 6936 } 6937 void hci_simulate_working_fuzz(void){ 6938 hci_init_done(); 6939 hci_stack->num_cmd_packets = 255; 6940 } 6941 #endif 6942