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