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 HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #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." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 // reset connection state on create and on reconnect 198 // don't overwrite addr, con handle, role 199 static void hci_connection_init(hci_connection_t * conn){ 200 conn->authentication_flags = AUTH_FLAG_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 conn->request_role = HCI_ROLE_INVALID; 205 conn->sniff_subrating_max_latency = 0xffff; 206 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 207 conn->link_key_type = INVALID_LINK_KEY; 208 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 209 btstack_run_loop_set_timer_context(&conn->timeout, conn); 210 hci_connection_timestamp(conn); 211 #endif 212 conn->acl_recombination_length = 0; 213 conn->acl_recombination_pos = 0; 214 conn->num_packets_sent = 0; 215 216 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 217 #ifdef ENABLE_BLE 218 conn->le_phy_update_all_phys = 0xff; 219 #endif 220 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 221 conn->le_max_tx_octets = 27; 222 #endif 223 #ifdef ENABLE_CLASSIC_PAIRING_OOB 224 conn->classic_oob_c_192 = NULL; 225 conn->classic_oob_r_192 = NULL; 226 conn->classic_oob_c_256 = NULL; 227 conn->classic_oob_r_256 = NULL; 228 #endif 229 } 230 231 /** 232 * create connection for given address 233 * 234 * @return connection OR NULL, if no memory left 235 */ 236 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 237 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 238 239 hci_connection_t * conn = btstack_memory_hci_connection_get(); 240 if (!conn) return NULL; 241 hci_connection_init(conn); 242 243 bd_addr_copy(conn->address, addr); 244 conn->address_type = addr_type; 245 conn->con_handle = HCI_CON_HANDLE_INVALID; 246 conn->role = HCI_ROLE_INVALID; 247 248 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 249 250 return conn; 251 } 252 253 254 /** 255 * get le connection parameter range 256 * 257 * @return le connection parameter range struct 258 */ 259 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 260 *range = hci_stack->le_connection_parameter_range; 261 } 262 263 /** 264 * set le connection parameter range 265 * 266 */ 267 268 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 269 hci_stack->le_connection_parameter_range = *range; 270 } 271 272 /** 273 * @brief Test if connection parameters are inside in existing rage 274 * @param conn_interval_min (unit: 1.25ms) 275 * @param conn_interval_max (unit: 1.25ms) 276 * @param conn_latency 277 * @param supervision_timeout (unit: 10ms) 278 * @returns 1 if included 279 */ 280 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){ 281 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 282 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 283 284 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 285 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 286 287 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 288 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 289 290 return 1; 291 } 292 293 /** 294 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 295 * @note: default: 1 296 * @param max_peripheral_connections 297 */ 298 #ifdef ENABLE_LE_PERIPHERAL 299 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 300 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 301 } 302 #endif 303 304 /** 305 * get hci connections iterator 306 * 307 * @return hci connections iterator 308 */ 309 310 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 311 btstack_linked_list_iterator_init(it, &hci_stack->connections); 312 } 313 314 /** 315 * get connection for a given handle 316 * 317 * @return connection OR NULL, if not found 318 */ 319 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 320 btstack_linked_list_iterator_t it; 321 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 322 while (btstack_linked_list_iterator_has_next(&it)){ 323 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 324 if ( item->con_handle == con_handle ) { 325 return item; 326 } 327 } 328 return NULL; 329 } 330 331 /** 332 * get connection for given address 333 * 334 * @return connection OR NULL, if not found 335 */ 336 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 337 btstack_linked_list_iterator_t it; 338 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 339 while (btstack_linked_list_iterator_has_next(&it)){ 340 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 341 if (connection->address_type != addr_type) continue; 342 if (memcmp(addr, connection->address, 6) != 0) continue; 343 return connection; 344 } 345 return NULL; 346 } 347 348 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 349 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 350 } 351 352 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 353 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 354 } 355 356 #ifdef ENABLE_CLASSIC 357 358 #ifdef ENABLE_SCO_OVER_HCI 359 static int hci_number_sco_connections(void){ 360 int connections = 0; 361 btstack_linked_list_iterator_t it; 362 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 363 while (btstack_linked_list_iterator_has_next(&it)){ 364 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 365 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 366 connections++; 367 } 368 return connections; 369 } 370 #endif 371 372 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 373 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 374 #ifdef HAVE_EMBEDDED_TICK 375 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 376 // connections might be timed out 377 hci_emit_l2cap_check_timeout(connection); 378 } 379 #else 380 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 381 // connections might be timed out 382 hci_emit_l2cap_check_timeout(connection); 383 } 384 #endif 385 } 386 387 static void hci_connection_timestamp(hci_connection_t *connection){ 388 #ifdef HAVE_EMBEDDED_TICK 389 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 390 #else 391 connection->timestamp = btstack_run_loop_get_time_ms(); 392 #endif 393 } 394 395 /** 396 * add authentication flags and reset timer 397 * @note: assumes classic connection 398 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 399 */ 400 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 401 bd_addr_t addr; 402 reverse_bd_addr(bd_addr, addr); 403 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 404 if (conn) { 405 connectionSetAuthenticationFlags(conn, flags); 406 hci_connection_timestamp(conn); 407 } 408 } 409 410 static bool hci_pairing_active(hci_connection_t * hci_connection){ 411 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 412 } 413 414 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 415 if (hci_pairing_active(hci_connection)) return; 416 if (ssp){ 417 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 418 } else { 419 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 420 } 421 // if we are initiator, we have sent an HCI Authenticate Request 422 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 423 424 // if we are responder, use minimal service security level as required level 425 if (!initiator){ 426 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); 427 } 428 429 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_STARTED; 433 event[1] = 10; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = (uint8_t) ssp; 437 event[11] = (uint8_t) initiator; 438 hci_emit_event(event, sizeof(event), 1); 439 } 440 441 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 442 hci_connection->requested_security_level = LEVEL_0; 443 if (!hci_pairing_active(hci_connection)) return; 444 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 445 #ifdef ENABLE_CLASSIC_PAIRING_OOB 446 hci_connection->classic_oob_c_192 = NULL; 447 hci_connection->classic_oob_r_192 = NULL; 448 hci_connection->classic_oob_c_256 = NULL; 449 hci_connection->classic_oob_r_256 = NULL; 450 #endif 451 log_info("pairing complete, status %02x", status); 452 453 uint8_t event[12]; 454 event[0] = GAP_EVENT_PAIRING_COMPLETE; 455 event[1] = 9; 456 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 457 reverse_bd_addr(hci_connection->address, &event[4]); 458 event[10] = status; 459 hci_emit_event(event, sizeof(event), 1); 460 } 461 462 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 463 hci_connection_t * conn = hci_connection_for_handle(handle); 464 if (!conn) return false; 465 return hci_pairing_active(conn); 466 } 467 468 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 469 if (!hci_stack->link_key_db) return; 470 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 471 hci_stack->link_key_db->delete_link_key(addr); 472 } 473 474 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 475 if (!hci_stack->link_key_db) return; 476 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 477 hci_stack->link_key_db->put_link_key(addr, link_key, type); 478 } 479 480 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 481 if (!hci_stack->link_key_db) return false; 482 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 483 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 484 return result; 485 } 486 487 void gap_delete_all_link_keys(void){ 488 bd_addr_t addr; 489 link_key_t link_key; 490 link_key_type_t type; 491 btstack_link_key_iterator_t it; 492 int ok = gap_link_key_iterator_init(&it); 493 if (!ok) { 494 log_error("could not initialize iterator"); 495 return; 496 } 497 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 498 gap_drop_link_key_for_bd_addr(addr); 499 } 500 gap_link_key_iterator_done(&it); 501 } 502 503 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 504 if (!hci_stack->link_key_db) return 0; 505 if (!hci_stack->link_key_db->iterator_init) return 0; 506 return hci_stack->link_key_db->iterator_init(it); 507 } 508 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){ 509 if (!hci_stack->link_key_db) return 0; 510 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 511 } 512 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 513 if (!hci_stack->link_key_db) return; 514 hci_stack->link_key_db->iterator_done(it); 515 } 516 #endif 517 518 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 519 switch (address_type){ 520 case BD_ADDR_TYPE_LE_PUBLIC: 521 case BD_ADDR_TYPE_LE_RANDOM: 522 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 523 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 524 return true; 525 default: 526 return false; 527 } 528 } 529 530 static int hci_is_le_connection(hci_connection_t * connection){ 531 return hci_is_le_connection_type(connection->address_type); 532 } 533 534 /** 535 * count connections 536 */ 537 static int nr_hci_connections(void){ 538 int count = 0; 539 btstack_linked_item_t *it; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 541 count++; 542 } 543 return count; 544 } 545 546 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 547 548 unsigned int num_packets_sent_classic = 0; 549 unsigned int num_packets_sent_le = 0; 550 551 btstack_linked_item_t *it; 552 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 553 hci_connection_t * connection = (hci_connection_t *) it; 554 if (hci_is_le_connection(connection)){ 555 num_packets_sent_le += connection->num_packets_sent; 556 } 557 if (connection->address_type == BD_ADDR_TYPE_ACL){ 558 num_packets_sent_classic += connection->num_packets_sent; 559 } 560 } 561 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 562 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 563 int free_slots_le = 0; 564 565 if (free_slots_classic < 0){ 566 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); 567 return 0; 568 } 569 570 if (hci_stack->le_acl_packets_total_num){ 571 // if we have LE slots, they are used 572 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 573 if (free_slots_le < 0){ 574 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); 575 return 0; 576 } 577 } else { 578 // otherwise, classic slots are used for LE, too 579 free_slots_classic -= num_packets_sent_le; 580 if (free_slots_classic < 0){ 581 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); 582 return 0; 583 } 584 } 585 586 switch (address_type){ 587 case BD_ADDR_TYPE_UNKNOWN: 588 log_error("hci_number_free_acl_slots: unknown address type"); 589 return 0; 590 591 case BD_ADDR_TYPE_ACL: 592 return free_slots_classic; 593 594 default: 595 if (hci_stack->le_acl_packets_total_num){ 596 return free_slots_le; 597 } 598 return free_slots_classic; 599 } 600 } 601 602 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 603 // get connection type 604 hci_connection_t * connection = hci_connection_for_handle(con_handle); 605 if (!connection){ 606 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 607 return 0; 608 } 609 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 610 } 611 612 #ifdef ENABLE_CLASSIC 613 static int hci_number_free_sco_slots(void){ 614 unsigned int num_sco_packets_sent = 0; 615 btstack_linked_item_t *it; 616 if (hci_stack->synchronous_flow_control_enabled){ 617 // explicit flow control 618 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 619 hci_connection_t * connection = (hci_connection_t *) it; 620 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 621 num_sco_packets_sent += connection->num_packets_sent; 622 } 623 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 624 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 625 return 0; 626 } 627 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 628 } else { 629 // implicit flow control -- TODO 630 int num_ready = 0; 631 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 632 hci_connection_t * connection = (hci_connection_t *) it; 633 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 634 if (connection->sco_tx_ready == 0) continue; 635 num_ready++; 636 } 637 return num_ready; 638 } 639 } 640 #endif 641 642 // only used to send HCI Host Number Completed Packets 643 static int hci_can_send_comand_packet_transport(void){ 644 if (hci_stack->hci_packet_buffer_reserved) return 0; 645 646 // check for async hci transport implementations 647 if (hci_stack->hci_transport->can_send_packet_now){ 648 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 649 return 0; 650 } 651 } 652 return 1; 653 } 654 655 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 656 bool hci_can_send_command_packet_now(void){ 657 if (hci_can_send_comand_packet_transport() == 0) return false; 658 return hci_stack->num_cmd_packets > 0u; 659 } 660 661 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 662 // check for async hci transport implementations 663 if (!hci_stack->hci_transport->can_send_packet_now) return true; 664 return hci_stack->hci_transport->can_send_packet_now(packet_type); 665 } 666 667 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 668 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 669 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 670 } 671 672 bool hci_can_send_acl_le_packet_now(void){ 673 if (hci_stack->hci_packet_buffer_reserved) return false; 674 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 675 } 676 677 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 678 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 679 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 680 } 681 682 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 683 if (hci_stack->hci_packet_buffer_reserved) return false; 684 return hci_can_send_prepared_acl_packet_now(con_handle); 685 } 686 687 #ifdef ENABLE_CLASSIC 688 bool hci_can_send_acl_classic_packet_now(void){ 689 if (hci_stack->hci_packet_buffer_reserved) return false; 690 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 691 } 692 693 bool hci_can_send_prepared_sco_packet_now(void){ 694 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 695 if (hci_have_usb_transport()){ 696 return hci_stack->sco_can_send_now; 697 } else { 698 return hci_number_free_sco_slots() > 0; 699 } 700 } 701 702 bool hci_can_send_sco_packet_now(void){ 703 if (hci_stack->hci_packet_buffer_reserved) return false; 704 return hci_can_send_prepared_sco_packet_now(); 705 } 706 707 void hci_request_sco_can_send_now_event(void){ 708 hci_stack->sco_waiting_for_can_send_now = 1; 709 hci_notify_if_sco_can_send_now(); 710 } 711 #endif 712 713 // used for internal checks in l2cap.c 714 bool hci_is_packet_buffer_reserved(void){ 715 return hci_stack->hci_packet_buffer_reserved; 716 } 717 718 // reserves outgoing packet buffer. @returns 1 if successful 719 bool hci_reserve_packet_buffer(void){ 720 if (hci_stack->hci_packet_buffer_reserved) { 721 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 722 return false; 723 } 724 hci_stack->hci_packet_buffer_reserved = true; 725 return true; 726 } 727 728 void hci_release_packet_buffer(void){ 729 hci_stack->hci_packet_buffer_reserved = false; 730 } 731 732 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 733 static int hci_transport_synchronous(void){ 734 return hci_stack->hci_transport->can_send_packet_now == NULL; 735 } 736 737 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 738 739 // 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); 740 741 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 742 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 743 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 744 max_acl_data_packet_length = hci_stack->le_data_packets_length; 745 } 746 747 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 748 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 749 max_acl_data_packet_length = connection->le_max_tx_octets; 750 } 751 #endif 752 753 log_debug("hci_send_acl_packet_fragments entered"); 754 755 uint8_t status = ERROR_CODE_SUCCESS; 756 // multiple packets could be send on a synchronous HCI transport 757 while (true){ 758 759 log_debug("hci_send_acl_packet_fragments loop entered"); 760 761 // get current data 762 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 763 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 764 bool more_fragments = false; 765 766 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 767 if (current_acl_data_packet_length > max_acl_data_packet_length){ 768 more_fragments = true; 769 current_acl_data_packet_length = max_acl_data_packet_length; 770 } 771 772 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 773 if (acl_header_pos > 0u){ 774 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 775 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 777 } 778 779 // update header len 780 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 781 782 // count packet 783 connection->num_packets_sent++; 784 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 785 786 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 787 if (more_fragments){ 788 // update start of next fragment to send 789 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 790 } else { 791 // done 792 hci_stack->acl_fragmentation_pos = 0; 793 hci_stack->acl_fragmentation_total_size = 0; 794 } 795 796 // send packet 797 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 798 const int size = current_acl_data_packet_length + 4; 799 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 800 hci_stack->acl_fragmentation_tx_active = 1; 801 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 802 if (err != 0){ 803 // no error from HCI Transport expected 804 status = ERROR_CODE_HARDWARE_FAILURE; 805 } 806 807 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 808 809 // done yet? 810 if (!more_fragments) break; 811 812 // can send more? 813 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 814 } 815 816 log_debug("hci_send_acl_packet_fragments loop over"); 817 818 // release buffer now for synchronous transport 819 if (hci_transport_synchronous()){ 820 hci_stack->acl_fragmentation_tx_active = 0; 821 hci_release_packet_buffer(); 822 hci_emit_transport_packet_sent(); 823 } 824 825 return status; 826 } 827 828 // pre: caller has reserved the packet buffer 829 uint8_t hci_send_acl_packet_buffer(int size){ 830 btstack_assert(hci_stack->hci_packet_buffer_reserved); 831 832 uint8_t * packet = hci_stack->hci_packet_buffer; 833 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 834 835 // check for free places on Bluetooth module 836 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 837 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 return BTSTACK_ACL_BUFFERS_FULL; 841 } 842 843 hci_connection_t *connection = hci_connection_for_handle( con_handle); 844 if (!connection) { 845 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 846 hci_release_packet_buffer(); 847 hci_emit_transport_packet_sent(); 848 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 849 } 850 851 #ifdef ENABLE_CLASSIC 852 hci_connection_timestamp(connection); 853 #endif 854 855 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 856 857 // setup data 858 hci_stack->acl_fragmentation_total_size = size; 859 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 860 861 return hci_send_acl_packet_fragments(connection); 862 } 863 864 #ifdef ENABLE_CLASSIC 865 // pre: caller has reserved the packet buffer 866 uint8_t hci_send_sco_packet_buffer(int size){ 867 btstack_assert(hci_stack->hci_packet_buffer_reserved); 868 869 uint8_t * packet = hci_stack->hci_packet_buffer; 870 871 // skip checks in loopback mode 872 if (!hci_stack->loopback_mode){ 873 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 874 875 // check for free places on Bluetooth module 876 if (!hci_can_send_prepared_sco_packet_now()) { 877 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 878 hci_release_packet_buffer(); 879 hci_emit_transport_packet_sent(); 880 return BTSTACK_ACL_BUFFERS_FULL; 881 } 882 883 // track send packet in connection struct 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 if (hci_have_usb_transport()){ 893 // token used 894 hci_stack->sco_can_send_now = false; 895 } else { 896 if (hci_stack->synchronous_flow_control_enabled){ 897 connection->num_packets_sent++; 898 } else { 899 connection->sco_tx_ready--; 900 } 901 } 902 } 903 904 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 905 906 #ifdef HAVE_SCO_TRANSPORT 907 hci_stack->sco_transport->send_packet(packet, size); 908 hci_release_packet_buffer(); 909 hci_emit_transport_packet_sent(); 910 911 return 0; 912 #else 913 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 914 if (hci_transport_synchronous()){ 915 hci_release_packet_buffer(); 916 hci_emit_transport_packet_sent(); 917 } 918 919 if (err != 0){ 920 return ERROR_CODE_HARDWARE_FAILURE; 921 } 922 return ERROR_CODE_SUCCESS; 923 #endif 924 } 925 #endif 926 927 static void acl_handler(uint8_t *packet, uint16_t size){ 928 929 // get info 930 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 931 hci_connection_t *conn = hci_connection_for_handle(con_handle); 932 uint8_t acl_flags = READ_ACL_FLAGS(packet); 933 uint16_t acl_length = READ_ACL_LENGTH(packet); 934 935 // ignore non-registered handle 936 if (!conn){ 937 log_error("acl_handler called with non-registered handle %u!" , con_handle); 938 return; 939 } 940 941 // assert packet is complete 942 if ((acl_length + 4u) != size){ 943 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 944 return; 945 } 946 947 #ifdef ENABLE_CLASSIC 948 // update idle timestamp 949 hci_connection_timestamp(conn); 950 #endif 951 952 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 953 hci_stack->host_completed_packets = 1; 954 conn->num_packets_completed++; 955 #endif 956 957 // handle different packet types 958 switch (acl_flags & 0x03u) { 959 960 case 0x01: // continuation fragment 961 962 // sanity checks 963 if (conn->acl_recombination_pos == 0u) { 964 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 965 return; 966 } 967 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 968 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 969 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 970 conn->acl_recombination_pos = 0; 971 return; 972 } 973 974 // append fragment payload (header already stored) 975 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 976 &packet[4], acl_length); 977 conn->acl_recombination_pos += acl_length; 978 979 // forward complete L2CAP packet if complete. 980 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 981 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 982 // reset recombination buffer 983 conn->acl_recombination_length = 0; 984 conn->acl_recombination_pos = 0; 985 } 986 break; 987 988 case 0x02: { // first fragment 989 990 // sanity check 991 if (conn->acl_recombination_pos) { 992 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 993 conn->acl_recombination_pos = 0; 994 } 995 996 // peek into L2CAP packet! 997 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 998 999 // compare fragment size to L2CAP packet size 1000 if (acl_length >= (l2cap_length + 4u)){ 1001 // forward fragment as L2CAP packet 1002 hci_emit_acl_packet(packet, acl_length + 4u); 1003 } else { 1004 1005 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1006 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1007 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1008 return; 1009 } 1010 1011 // store first fragment and tweak acl length for complete package 1012 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1013 packet, acl_length + 4u); 1014 conn->acl_recombination_pos = acl_length + 4u; 1015 conn->acl_recombination_length = l2cap_length; 1016 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1017 } 1018 break; 1019 1020 } 1021 default: 1022 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1023 return; 1024 } 1025 1026 // execute main loop 1027 hci_run(); 1028 } 1029 1030 static void hci_connection_stop_timer(hci_connection_t * conn){ 1031 btstack_run_loop_remove_timer(&conn->timeout); 1032 #ifdef ENABLE_CLASSIC 1033 btstack_run_loop_remove_timer(&conn->timeout_sco); 1034 #endif 1035 } 1036 1037 static void hci_shutdown_connection(hci_connection_t *conn){ 1038 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1039 1040 #ifdef ENABLE_CLASSIC 1041 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1042 bd_addr_type_t addr_type = conn->address_type; 1043 #endif 1044 #ifdef HAVE_SCO_TRANSPORT 1045 hci_con_handle_t con_handle = conn->con_handle; 1046 #endif 1047 #endif 1048 1049 hci_connection_stop_timer(conn); 1050 1051 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1052 btstack_memory_hci_connection_free( conn ); 1053 1054 // now it's gone 1055 hci_emit_nr_connections_changed(); 1056 1057 #ifdef ENABLE_CLASSIC 1058 #ifdef ENABLE_SCO_OVER_HCI 1059 // update SCO 1060 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1061 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1062 } 1063 #endif 1064 #ifdef HAVE_SCO_TRANSPORT 1065 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1066 hci_stack->sco_transport->close(con_handle); 1067 } 1068 #endif 1069 #endif 1070 } 1071 1072 #ifdef ENABLE_CLASSIC 1073 1074 static const uint16_t packet_type_sizes[] = { 1075 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1076 HCI_ACL_DH1_SIZE, 0, 0, 0, 1077 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1078 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1079 }; 1080 static const uint8_t packet_type_feature_requirement_bit[] = { 1081 0, // 3 slot packets 1082 1, // 5 slot packets 1083 25, // EDR 2 mpbs 1084 26, // EDR 3 mbps 1085 39, // 3 slot EDR packts 1086 40, // 5 slot EDR packet 1087 }; 1088 static const uint16_t packet_type_feature_packet_mask[] = { 1089 0x0f00, // 3 slot packets 1090 0xf000, // 5 slot packets 1091 0x1102, // EDR 2 mpbs 1092 0x2204, // EDR 3 mbps 1093 0x0300, // 3 slot EDR packts 1094 0x3000, // 5 slot EDR packet 1095 }; 1096 1097 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1098 // enable packet types based on size 1099 uint16_t packet_types = 0; 1100 unsigned int i; 1101 for (i=0;i<16;i++){ 1102 if (packet_type_sizes[i] == 0) continue; 1103 if (packet_type_sizes[i] <= buffer_size){ 1104 packet_types |= 1 << i; 1105 } 1106 } 1107 // disable packet types due to missing local supported features 1108 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1109 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1110 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1111 if (feature_set) continue; 1112 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1113 packet_types &= ~packet_type_feature_packet_mask[i]; 1114 } 1115 // flip bits for "may not be used" 1116 packet_types ^= 0x3306; 1117 return packet_types; 1118 } 1119 1120 uint16_t hci_usable_acl_packet_types(void){ 1121 return hci_stack->packet_types; 1122 } 1123 #endif 1124 1125 uint8_t* hci_get_outgoing_packet_buffer(void){ 1126 // hci packet buffer is >= acl data packet length 1127 return hci_stack->hci_packet_buffer; 1128 } 1129 1130 uint16_t hci_max_acl_data_packet_length(void){ 1131 return hci_stack->acl_data_packet_length; 1132 } 1133 1134 #ifdef ENABLE_CLASSIC 1135 bool hci_extended_sco_link_supported(void){ 1136 // No. 31, byte 3, bit 7 1137 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1138 } 1139 #endif 1140 1141 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1142 // No. 54, byte 6, bit 6 1143 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1144 } 1145 1146 static int gap_ssp_supported(void){ 1147 // No. 51, byte 6, bit 3 1148 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1149 } 1150 1151 static int hci_classic_supported(void){ 1152 #ifdef ENABLE_CLASSIC 1153 // No. 37, byte 4, bit 5, = No BR/EDR Support 1154 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1155 #else 1156 return 0; 1157 #endif 1158 } 1159 1160 static int hci_le_supported(void){ 1161 #ifdef ENABLE_BLE 1162 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1163 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1164 #else 1165 return 0; 1166 #endif 1167 } 1168 1169 #ifdef ENABLE_BLE 1170 1171 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1172 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1173 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1174 } else { 1175 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1176 } 1177 } 1178 1179 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1180 *addr_type = hci_stack->le_own_addr_type; 1181 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1182 } 1183 1184 #ifdef ENABLE_LE_PERIPHERAL 1185 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1186 *addr_type = hci_stack->le_advertisements_own_addr_type; 1187 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1188 }; 1189 #endif 1190 1191 #ifdef ENABLE_LE_CENTRAL 1192 1193 /** 1194 * @brief Get own addr type and address used for LE connections (Central) 1195 */ 1196 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1197 *addr_type = hci_stack->le_connection_own_addr_type; 1198 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1199 } 1200 1201 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1202 1203 int offset = 3; 1204 int num_reports = packet[offset]; 1205 offset += 1; 1206 1207 int i; 1208 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1209 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1210 for (i=0; (i<num_reports) && (offset < size);i++){ 1211 // sanity checks on data_length: 1212 uint8_t data_length = packet[offset + 8]; 1213 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1214 if ((offset + 9u + data_length + 1u) > size) return; 1215 // setup event 1216 uint8_t event_size = 10u + data_length; 1217 int pos = 0; 1218 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1219 event[pos++] = event_size; 1220 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1221 offset += 8; 1222 pos += 8; 1223 event[pos++] = packet[offset + 1 + data_length]; // rssi 1224 event[pos++] = data_length; 1225 offset++; 1226 (void)memcpy(&event[pos], &packet[offset], data_length); 1227 pos += data_length; 1228 offset += data_length + 1u; // rssi 1229 hci_emit_event(event, pos, 1); 1230 } 1231 } 1232 #endif 1233 #endif 1234 1235 #ifdef ENABLE_BLE 1236 #ifdef ENABLE_LE_PERIPHERAL 1237 static void hci_update_advertisements_enabled_for_current_roles(void){ 1238 if (hci_stack->le_advertisements_enabled){ 1239 // get number of active le slave connections 1240 int num_slave_connections = 0; 1241 btstack_linked_list_iterator_t it; 1242 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1243 while (btstack_linked_list_iterator_has_next(&it)){ 1244 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1245 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1246 if (con->state != OPEN) continue; 1247 if (con->role != HCI_ROLE_SLAVE) continue; 1248 if (!hci_is_le_connection(con)) continue; 1249 num_slave_connections++; 1250 } 1251 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1252 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1253 } else { 1254 hci_stack->le_advertisements_enabled_for_current_roles = false; 1255 } 1256 } 1257 #endif 1258 #endif 1259 1260 #ifdef ENABLE_CLASSIC 1261 static void gap_run_set_local_name(void){ 1262 hci_reserve_packet_buffer(); 1263 uint8_t * packet = hci_stack->hci_packet_buffer; 1264 // construct HCI Command and send 1265 uint16_t opcode = hci_write_local_name.opcode; 1266 hci_stack->last_cmd_opcode = opcode; 1267 packet[0] = opcode & 0xff; 1268 packet[1] = opcode >> 8; 1269 packet[2] = DEVICE_NAME_LEN; 1270 memset(&packet[3], 0, DEVICE_NAME_LEN); 1271 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1272 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1273 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1274 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1275 // expand '00:00:00:00:00:00' in name with bd_addr 1276 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1277 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1278 } 1279 1280 static void gap_run_set_eir_data(void){ 1281 hci_reserve_packet_buffer(); 1282 uint8_t * packet = hci_stack->hci_packet_buffer; 1283 // construct HCI Command in-place and send 1284 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1285 hci_stack->last_cmd_opcode = opcode; 1286 uint16_t offset = 0; 1287 packet[offset++] = opcode & 0xff; 1288 packet[offset++] = opcode >> 8; 1289 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1290 packet[offset++] = 0; // FEC not required 1291 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1292 if (hci_stack->eir_data){ 1293 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1294 ad_context_t context; 1295 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1296 uint8_t data_type = ad_iterator_get_data_type(&context); 1297 uint8_t size = ad_iterator_get_data_len(&context); 1298 const uint8_t *data = ad_iterator_get_data(&context); 1299 // copy item 1300 packet[offset++] = size + 1; 1301 packet[offset++] = data_type; 1302 memcpy(&packet[offset], data, size); 1303 // update name item 1304 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1305 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1306 } 1307 offset += size; 1308 } 1309 } else { 1310 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1311 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1312 packet[offset++] = bytes_to_copy + 1; 1313 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1314 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1315 // expand '00:00:00:00:00:00' in name with bd_addr 1316 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1317 } 1318 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1319 } 1320 #endif 1321 1322 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1323 1324 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1325 if (!hci_stack->config) return 0; 1326 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1327 // Limit baud rate for Broadcom chipsets to 3 mbps 1328 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1329 baud_rate = 3000000; 1330 } 1331 return baud_rate; 1332 } 1333 1334 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1335 UNUSED(ds); 1336 1337 switch (hci_stack->substate){ 1338 case HCI_INIT_W4_SEND_RESET: 1339 log_info("Resend HCI Reset"); 1340 hci_stack->substate = HCI_INIT_SEND_RESET; 1341 hci_stack->num_cmd_packets = 1; 1342 hci_run(); 1343 break; 1344 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1345 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1346 if (hci_stack->hci_transport->reset_link){ 1347 hci_stack->hci_transport->reset_link(); 1348 } 1349 1350 /* fall through */ 1351 1352 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1353 log_info("Resend HCI Reset - CSR Warm Boot"); 1354 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1355 hci_stack->num_cmd_packets = 1; 1356 hci_run(); 1357 break; 1358 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1359 if (hci_stack->hci_transport->set_baudrate){ 1360 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1361 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1362 hci_stack->hci_transport->set_baudrate(baud_rate); 1363 } 1364 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1365 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1366 if (hci_stack->hci_transport->reset_link){ 1367 log_info("Link Reset"); 1368 hci_stack->hci_transport->reset_link(); 1369 } 1370 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1371 hci_run(); 1372 } 1373 break; 1374 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1375 // otherwise continue 1376 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1377 hci_send_cmd(&hci_read_local_supported_commands); 1378 break; 1379 default: 1380 break; 1381 } 1382 } 1383 #endif 1384 1385 static void hci_initializing_next_state(void){ 1386 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1387 } 1388 1389 // assumption: hci_can_send_command_packet_now() == true 1390 static void hci_initializing_run(void){ 1391 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1392 switch (hci_stack->substate){ 1393 case HCI_INIT_SEND_RESET: 1394 hci_state_reset(); 1395 1396 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1397 // prepare reset if command complete not received in 100ms 1398 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1399 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1400 btstack_run_loop_add_timer(&hci_stack->timeout); 1401 #endif 1402 // send command 1403 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1404 hci_send_cmd(&hci_reset); 1405 break; 1406 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1407 hci_send_cmd(&hci_read_local_version_information); 1408 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1409 break; 1410 case HCI_INIT_SEND_READ_LOCAL_NAME: 1411 hci_send_cmd(&hci_read_local_name); 1412 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1413 break; 1414 1415 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1416 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1417 hci_state_reset(); 1418 // prepare reset if command complete not received in 100ms 1419 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1420 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1421 btstack_run_loop_add_timer(&hci_stack->timeout); 1422 // send command 1423 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1424 hci_send_cmd(&hci_reset); 1425 break; 1426 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1427 hci_state_reset(); 1428 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1429 hci_send_cmd(&hci_reset); 1430 break; 1431 case HCI_INIT_SEND_BAUD_CHANGE: { 1432 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1433 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1434 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1435 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1436 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1437 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1438 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1439 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1440 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1441 btstack_run_loop_add_timer(&hci_stack->timeout); 1442 } 1443 break; 1444 } 1445 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1446 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1447 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1448 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1449 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1450 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1451 break; 1452 } 1453 case HCI_INIT_CUSTOM_INIT: 1454 // Custom initialization 1455 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1456 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1457 bool send_cmd = false; 1458 switch (hci_stack->chipset_result){ 1459 case BTSTACK_CHIPSET_VALID_COMMAND: 1460 send_cmd = true; 1461 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1462 break; 1463 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1464 send_cmd = true; 1465 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1466 log_info("CSR Warm Boot"); 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 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1471 && hci_stack->config 1472 && hci_stack->chipset 1473 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1474 && hci_stack->hci_transport->set_baudrate 1475 && hci_transport_uart_get_main_baud_rate()){ 1476 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1477 } else { 1478 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1479 } 1480 break; 1481 default: 1482 break; 1483 } 1484 1485 if (send_cmd){ 1486 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1487 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1488 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1489 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1490 break; 1491 } 1492 log_info("Init script done"); 1493 1494 // Init script download on Broadcom chipsets causes: 1495 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1496 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1497 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1498 1499 // - baud rate to reset, restore UART baud rate if needed 1500 int need_baud_change = hci_stack->config 1501 && hci_stack->chipset 1502 && hci_stack->chipset->set_baudrate_command 1503 && hci_stack->hci_transport->set_baudrate 1504 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1505 if (need_baud_change) { 1506 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1507 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1508 hci_stack->hci_transport->set_baudrate(baud_rate); 1509 } 1510 1511 uint16_t bcm_delay_ms = 300; 1512 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1513 // -> Work around: wait here. 1514 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1515 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1516 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1517 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1518 btstack_run_loop_add_timer(&hci_stack->timeout); 1519 break; 1520 } 1521 } 1522 // otherwise continue 1523 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1524 hci_send_cmd(&hci_read_local_supported_commands); 1525 break; 1526 case HCI_INIT_SET_BD_ADDR: 1527 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1528 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1529 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1530 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1531 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1532 break; 1533 #endif 1534 1535 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1536 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1537 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1538 hci_send_cmd(&hci_read_local_supported_commands); 1539 break; 1540 case HCI_INIT_READ_BD_ADDR: 1541 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1542 hci_send_cmd(&hci_read_bd_addr); 1543 break; 1544 case HCI_INIT_READ_BUFFER_SIZE: 1545 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1546 hci_send_cmd(&hci_read_buffer_size); 1547 break; 1548 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1549 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1550 hci_send_cmd(&hci_read_local_supported_features); 1551 break; 1552 1553 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1554 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1555 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1556 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1557 break; 1558 case HCI_INIT_HOST_BUFFER_SIZE: 1559 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1560 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1561 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1562 break; 1563 #endif 1564 1565 case HCI_INIT_SET_EVENT_MASK: 1566 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1567 if (hci_le_supported()){ 1568 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1569 } else { 1570 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1571 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1572 } 1573 break; 1574 1575 #ifdef ENABLE_CLASSIC 1576 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1577 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1578 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1579 break; 1580 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1581 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1582 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1583 break; 1584 case HCI_INIT_WRITE_INQUIRY_MODE: 1585 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1586 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1587 break; 1588 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1589 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1590 hci_stack->secure_connections_active = true; 1591 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1592 break; 1593 case HCI_INIT_WRITE_SCAN_ENABLE: 1594 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1595 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1596 break; 1597 // only sent if ENABLE_SCO_OVER_HCI is defined 1598 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1599 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1600 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1601 break; 1602 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1603 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1604 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1605 break; 1606 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1607 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1608 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1609 #ifdef ENABLE_SCO_OVER_HCI 1610 log_info("BCM: Route SCO data via HCI transport"); 1611 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1612 #endif 1613 #ifdef ENABLE_SCO_OVER_PCM 1614 log_info("BCM: Route SCO data via PCM interface"); 1615 #ifdef ENABLE_BCM_PCM_WBS 1616 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1617 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1618 #else 1619 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1620 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1621 #endif 1622 #endif 1623 break; 1624 #ifdef ENABLE_SCO_OVER_PCM 1625 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1626 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1627 log_info("BCM: Config PCM interface for I2S"); 1628 #ifdef ENABLE_BCM_PCM_WBS 1629 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1630 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1631 #else 1632 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1633 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1634 #endif 1635 break; 1636 #endif 1637 #endif 1638 1639 #ifdef ENABLE_BLE 1640 // LE INIT 1641 case HCI_INIT_LE_READ_BUFFER_SIZE: 1642 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1643 hci_send_cmd(&hci_le_read_buffer_size); 1644 break; 1645 case HCI_INIT_LE_SET_EVENT_MASK: 1646 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1647 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1648 break; 1649 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1650 // LE Supported Host = 1, Simultaneous Host = 0 1651 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1652 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1653 break; 1654 #endif 1655 1656 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1657 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1658 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1659 hci_send_cmd(&hci_le_read_maximum_data_length); 1660 break; 1661 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1662 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1663 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1664 break; 1665 #endif 1666 1667 #ifdef ENABLE_LE_CENTRAL 1668 case HCI_INIT_READ_WHITE_LIST_SIZE: 1669 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1670 hci_send_cmd(&hci_le_read_white_list_size); 1671 break; 1672 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1673 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1674 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); 1675 break; 1676 #endif 1677 default: 1678 return; 1679 } 1680 } 1681 1682 static void hci_init_done(void){ 1683 // done. tell the app 1684 log_info("hci_init_done -> HCI_STATE_WORKING"); 1685 hci_stack->state = HCI_STATE_WORKING; 1686 hci_emit_state(); 1687 hci_run(); 1688 } 1689 1690 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1691 bool command_completed = false; 1692 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1693 uint16_t opcode = little_endian_read_16(packet,3); 1694 if (opcode == hci_stack->last_cmd_opcode){ 1695 command_completed = true; 1696 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1697 } else { 1698 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1699 } 1700 } 1701 1702 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1703 uint8_t status = packet[2]; 1704 uint16_t opcode = little_endian_read_16(packet,4); 1705 if (opcode == hci_stack->last_cmd_opcode){ 1706 if (status){ 1707 command_completed = true; 1708 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1709 } else { 1710 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1711 } 1712 } else { 1713 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1714 } 1715 } 1716 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1717 // Vendor == CSR 1718 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1719 // TODO: track actual command 1720 command_completed = true; 1721 } 1722 1723 // Vendor == Toshiba 1724 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1725 // TODO: track actual command 1726 command_completed = true; 1727 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1728 hci_stack->num_cmd_packets = 1; 1729 } 1730 #endif 1731 1732 return command_completed; 1733 } 1734 1735 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1736 1737 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1738 1739 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1740 1741 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1742 1743 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1744 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1745 // 1746 // HCI Reset 1747 // Timeout 100 ms 1748 // HCI Reset 1749 // Command Complete Reset 1750 // HCI Read Local Version Information 1751 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1752 // hang... 1753 // 1754 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1755 if (!command_completed 1756 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1757 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1758 1759 uint16_t opcode = little_endian_read_16(packet,3); 1760 if (opcode == hci_reset.opcode){ 1761 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1762 return; 1763 } 1764 } 1765 1766 // CSR & H5 1767 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1768 if (!command_completed 1769 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1770 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1771 1772 uint16_t opcode = little_endian_read_16(packet,3); 1773 if (opcode == hci_reset.opcode){ 1774 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1775 return; 1776 } 1777 } 1778 1779 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1780 // fix: Correct substate and behave as command below 1781 if (command_completed){ 1782 switch (hci_stack->substate){ 1783 case HCI_INIT_SEND_RESET: 1784 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1785 break; 1786 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1787 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1788 break; 1789 default: 1790 break; 1791 } 1792 } 1793 1794 #endif 1795 1796 if (!command_completed) return; 1797 1798 bool need_baud_change = false; 1799 bool need_addr_change = false; 1800 1801 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1802 need_baud_change = hci_stack->config 1803 && hci_stack->chipset 1804 && hci_stack->chipset->set_baudrate_command 1805 && hci_stack->hci_transport->set_baudrate 1806 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1807 1808 need_addr_change = hci_stack->custom_bd_addr_set 1809 && hci_stack->chipset 1810 && hci_stack->chipset->set_bd_addr_command; 1811 #endif 1812 1813 switch(hci_stack->substate){ 1814 1815 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1816 case HCI_INIT_SEND_RESET: 1817 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1818 // fix: just correct substate and behave as command below 1819 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1820 btstack_run_loop_remove_timer(&hci_stack->timeout); 1821 break; 1822 case HCI_INIT_W4_SEND_RESET: 1823 btstack_run_loop_remove_timer(&hci_stack->timeout); 1824 break; 1825 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1826 log_info("Received local name, need baud change %d", (int) need_baud_change); 1827 if (need_baud_change){ 1828 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1829 return; 1830 } 1831 // skip baud change 1832 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1833 return; 1834 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1835 // for STLC2500D, baud rate change already happened. 1836 // for others, baud rate gets changed now 1837 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1838 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1839 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1840 hci_stack->hci_transport->set_baudrate(baud_rate); 1841 } 1842 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1843 return; 1844 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1845 btstack_run_loop_remove_timer(&hci_stack->timeout); 1846 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1847 return; 1848 case HCI_INIT_W4_CUSTOM_INIT: 1849 // repeat custom init 1850 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1851 return; 1852 #else 1853 case HCI_INIT_W4_SEND_RESET: 1854 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1855 return ; 1856 #endif 1857 1858 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1859 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1860 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1861 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1862 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1863 return; 1864 } 1865 if (need_addr_change){ 1866 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1867 return; 1868 } 1869 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1870 return; 1871 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1872 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1873 if (need_baud_change){ 1874 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1875 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1876 hci_stack->hci_transport->set_baudrate(baud_rate); 1877 } 1878 if (need_addr_change){ 1879 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1880 return; 1881 } 1882 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1883 return; 1884 case HCI_INIT_W4_SET_BD_ADDR: 1885 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1886 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1887 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1888 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1889 return; 1890 } 1891 // skipping st warm boot 1892 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1893 return; 1894 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1895 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1896 return; 1897 #endif 1898 case HCI_INIT_W4_READ_BD_ADDR: 1899 // only read buffer size if supported 1900 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1901 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1902 return; 1903 } 1904 // skipping read buffer size 1905 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1906 return; 1907 case HCI_INIT_W4_SET_EVENT_MASK: 1908 // skip Classic init commands for LE only chipsets 1909 if (!hci_classic_supported()){ 1910 #ifdef ENABLE_BLE 1911 if (hci_le_supported()){ 1912 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1913 return; 1914 } 1915 #endif 1916 log_error("Neither BR/EDR nor LE supported"); 1917 hci_init_done(); 1918 return; 1919 } 1920 if (!gap_ssp_supported()){ 1921 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1922 return; 1923 } 1924 break; 1925 #ifdef ENABLE_BLE 1926 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1927 // skip write le host if not supported (e.g. on LE only EM9301) 1928 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1929 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1930 return; 1931 1932 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1933 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1934 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1935 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1936 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1937 return; 1938 } 1939 // explicit fall through to reduce repetitions 1940 1941 #ifdef ENABLE_LE_CENTRAL 1942 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1943 #else 1944 hci_init_done(); 1945 #endif 1946 return; 1947 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1948 1949 #endif /* ENABLE_BLE */ 1950 1951 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1952 // skip write secure connections host support if not supported or disabled 1953 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1954 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1955 return; 1956 } 1957 break; 1958 1959 #ifdef ENABLE_SCO_OVER_HCI 1960 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1961 // skip write synchronous flow control if not supported 1962 if (hci_stack->local_supported_commands[0] & 0x04) break; 1963 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1964 1965 /* fall through */ 1966 1967 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1968 // skip write default erroneous data reporting if not supported 1969 if (hci_stack->local_supported_commands[0] & 0x08) break; 1970 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1971 1972 /* fall through */ 1973 1974 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1975 // skip bcm set sco pcm config on non-Broadcom chipsets 1976 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1977 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1978 1979 /* fall through */ 1980 1981 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1982 if (!hci_le_supported()){ 1983 // SKIP LE init for Classic only configuration 1984 hci_init_done(); 1985 return; 1986 } 1987 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1988 break; 1989 1990 #else /* !ENABLE_SCO_OVER_HCI */ 1991 1992 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1993 #ifdef ENABLE_SCO_OVER_PCM 1994 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1995 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1996 return; 1997 } 1998 #endif 1999 /* fall through */ 2000 2001 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2002 #ifdef ENABLE_BLE 2003 if (hci_le_supported()){ 2004 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 2005 return; 2006 } 2007 #endif 2008 // SKIP LE init for Classic only configuration 2009 hci_init_done(); 2010 return; 2011 #endif /* ENABLE_SCO_OVER_HCI */ 2012 2013 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2014 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2015 // Response to command before init done state -> init done 2016 case (HCI_INIT_DONE-1): 2017 hci_init_done(); 2018 return; 2019 #endif 2020 2021 default: 2022 break; 2023 } 2024 hci_initializing_next_state(); 2025 } 2026 2027 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2028 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2029 bd_addr_t bd_address; 2030 (void)memcpy(&bd_address, conn->address, 6); 2031 2032 #ifdef ENABLE_CLASSIC 2033 // cache needed data 2034 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2035 #endif 2036 2037 // connection failed, remove entry 2038 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2039 btstack_memory_hci_connection_free( conn ); 2040 2041 #ifdef ENABLE_CLASSIC 2042 // notify client if dedicated bonding 2043 if (notify_dedicated_bonding_failed){ 2044 log_info("hci notify_dedicated_bonding_failed"); 2045 hci_emit_dedicated_bonding_result(bd_address, status); 2046 } 2047 2048 // if authentication error, also delete link key 2049 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2050 gap_drop_link_key_for_bd_addr(bd_address); 2051 } 2052 #else 2053 UNUSED(status); 2054 #endif 2055 } 2056 2057 #ifdef ENABLE_CLASSIC 2058 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2059 // SSP Controller 2060 if (features[6] & (1 << 3)){ 2061 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2062 } 2063 // eSCO 2064 if (features[3] & (1<<7)){ 2065 conn->remote_supported_features[0] |= 1; 2066 } 2067 // Extended features 2068 if (features[7] & (1<<7)){ 2069 conn->remote_supported_features[0] |= 2; 2070 } 2071 } 2072 2073 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2074 // SSP Host 2075 if (features[0] & (1 << 0)){ 2076 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2077 } 2078 // SC Host 2079 if (features[0] & (1 << 3)){ 2080 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2081 } 2082 } 2083 2084 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2085 // SC Controller 2086 if (features[1] & (1 << 0)){ 2087 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2088 } 2089 } 2090 2091 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2092 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2093 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2094 if (conn->bonding_flags & BONDING_DEDICATED){ 2095 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2096 } 2097 } 2098 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2099 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2100 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2101 } 2102 2103 #endif 2104 2105 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2106 // handle BT initialization 2107 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2108 hci_initializing_event_handler(packet, size); 2109 } 2110 2111 // help with BT sleep 2112 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2113 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2114 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2115 hci_initializing_next_state(); 2116 } 2117 } 2118 2119 #ifdef ENABLE_CLASSIC 2120 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2121 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2122 conn->encryption_key_size = encryption_key_size; 2123 2124 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2125 conn->requested_security_level = LEVEL_0; 2126 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2127 return; 2128 } 2129 2130 // Request Authentication if not already done 2131 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2132 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2133 } 2134 #endif 2135 2136 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2137 UNUSED(size); 2138 2139 uint16_t manufacturer; 2140 #ifdef ENABLE_CLASSIC 2141 hci_con_handle_t handle; 2142 hci_connection_t * conn; 2143 uint8_t status; 2144 #endif 2145 // get num cmd packets - limit to 1 to reduce complexity 2146 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2147 2148 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2149 switch (opcode){ 2150 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2151 if (packet[5]) break; 2152 // terminate, name 248 chars 2153 packet[6+248] = 0; 2154 log_info("local name: %s", &packet[6]); 2155 break; 2156 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2157 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2158 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2159 uint16_t acl_len = little_endian_read_16(packet, 6); 2160 uint16_t sco_len = packet[8]; 2161 2162 // determine usable ACL/SCO payload size 2163 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2164 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2165 2166 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2167 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2168 2169 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2170 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2171 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2172 } 2173 break; 2174 case HCI_OPCODE_HCI_READ_RSSI: 2175 if (packet[5] == ERROR_CODE_SUCCESS){ 2176 uint8_t event[5]; 2177 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2178 event[1] = 3; 2179 (void)memcpy(&event[2], &packet[6], 3); 2180 hci_emit_event(event, sizeof(event), 1); 2181 } 2182 break; 2183 #ifdef ENABLE_BLE 2184 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2185 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2186 hci_stack->le_acl_packets_total_num = packet[8]; 2187 // determine usable ACL payload size 2188 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2189 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2190 } 2191 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2192 break; 2193 #endif 2194 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2195 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2196 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2197 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2198 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); 2199 break; 2200 #endif 2201 #ifdef ENABLE_LE_CENTRAL 2202 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2203 hci_stack->le_whitelist_capacity = packet[6]; 2204 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2205 break; 2206 #endif 2207 case HCI_OPCODE_HCI_READ_BD_ADDR: 2208 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2209 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)); 2210 #ifdef ENABLE_CLASSIC 2211 if (hci_stack->link_key_db){ 2212 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2213 } 2214 #endif 2215 break; 2216 #ifdef ENABLE_CLASSIC 2217 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2218 hci_emit_discoverable_enabled(hci_stack->discoverable); 2219 break; 2220 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2221 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2222 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2223 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2224 hci_emit_event(event, sizeof(event), 1); 2225 } 2226 break; 2227 #endif 2228 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2229 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2230 2231 #ifdef ENABLE_CLASSIC 2232 // determine usable ACL packet types based on host buffer size and supported features 2233 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2234 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2235 #endif 2236 // Classic/LE 2237 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2238 break; 2239 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2240 manufacturer = little_endian_read_16(packet, 10); 2241 // map Cypress to Broadcom 2242 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2243 log_info("Treat Cypress as Broadcom"); 2244 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2245 little_endian_store_16(packet, 10, manufacturer); 2246 } 2247 hci_stack->manufacturer = manufacturer; 2248 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2249 break; 2250 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2251 hci_stack->local_supported_commands[0] = 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2254 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2255 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2256 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2257 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2258 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2259 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2260 hci_stack->local_supported_commands[1] = 2261 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2262 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2263 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2264 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2265 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2266 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2267 break; 2268 #ifdef ENABLE_CLASSIC 2269 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2270 if (packet[5]) return; 2271 hci_stack->synchronous_flow_control_enabled = 1; 2272 break; 2273 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2274 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2275 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2276 conn = hci_connection_for_handle(handle); 2277 if (conn != NULL) { 2278 uint8_t key_size = 0; 2279 if (status == 0){ 2280 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2281 log_info("Handle %04x key Size: %u", handle, key_size); 2282 } else { 2283 key_size = 1; 2284 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2285 } 2286 hci_handle_read_encryption_key_size_complete(conn, key_size); 2287 } 2288 break; 2289 // assert pairing complete event is emitted. 2290 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2291 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2292 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2293 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2294 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2295 // lookup connection by gap pairing addr 2296 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2297 if (conn == NULL) break; 2298 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2299 break; 2300 2301 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2302 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2303 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2304 uint8_t event[67]; 2305 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2306 event[1] = 65; 2307 (void)memset(&event[2], 0, 65); 2308 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2309 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2310 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2311 event[2] = 3; 2312 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2313 } else { 2314 event[2] = 1; 2315 } 2316 } 2317 hci_emit_event(event, sizeof(event), 0); 2318 break; 2319 } 2320 2321 // note: only needed if user does not provide OOB data 2322 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2323 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2324 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2325 if (conn == NULL) break; 2326 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2327 break; 2328 #endif 2329 #endif 2330 default: 2331 break; 2332 } 2333 } 2334 2335 #ifdef ENABLE_BLE 2336 static void event_handle_le_connection_complete(const uint8_t * packet){ 2337 bd_addr_t addr; 2338 bd_addr_type_t addr_type; 2339 hci_connection_t * conn; 2340 2341 // Connection management 2342 reverse_bd_addr(&packet[8], addr); 2343 addr_type = (bd_addr_type_t)packet[7]; 2344 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2345 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2346 2347 #ifdef ENABLE_LE_CENTRAL 2348 // handle error: error is reported only to the initiator -> outgoing connection 2349 if (packet[3]){ 2350 2351 // handle cancelled outgoing connection 2352 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2353 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2354 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2355 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2356 // reset state 2357 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2358 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2359 // get outgoing connection conn struct for direct connect 2360 conn = gap_get_outgoing_connection(); 2361 } 2362 2363 // outgoing le connection establishment is done 2364 if (conn){ 2365 // remove entry 2366 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2367 btstack_memory_hci_connection_free( conn ); 2368 } 2369 return; 2370 } 2371 #endif 2372 2373 // on success, both hosts receive connection complete event 2374 if (packet[6] == HCI_ROLE_MASTER){ 2375 #ifdef ENABLE_LE_CENTRAL 2376 // if we're master on an le connection, it was an outgoing connection and we're done with it 2377 // note: no hci_connection_t object exists yet for connect with whitelist 2378 if (hci_is_le_connection_type(addr_type)){ 2379 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2380 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2381 } 2382 #endif 2383 } else { 2384 #ifdef ENABLE_LE_PERIPHERAL 2385 // if we're slave, it was an incoming connection, advertisements have stopped 2386 hci_stack->le_advertisements_active = false; 2387 #endif 2388 } 2389 2390 // LE connections are auto-accepted, so just create a connection if there isn't one already 2391 if (!conn){ 2392 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2393 } 2394 2395 // no memory, sorry. 2396 if (!conn){ 2397 return; 2398 } 2399 2400 conn->state = OPEN; 2401 conn->role = packet[6]; 2402 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2403 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2404 2405 #ifdef ENABLE_LE_PERIPHERAL 2406 if (packet[6] == HCI_ROLE_SLAVE){ 2407 hci_update_advertisements_enabled_for_current_roles(); 2408 } 2409 #endif 2410 2411 // init unenhanced att bearer mtu 2412 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2413 conn->att_connection.mtu_exchanged = false; 2414 2415 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2416 2417 // restart timer 2418 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2419 // btstack_run_loop_add_timer(&conn->timeout); 2420 2421 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2422 2423 hci_emit_nr_connections_changed(); 2424 } 2425 #endif 2426 2427 #ifdef ENABLE_CLASSIC 2428 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){ 2429 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2430 // LEVEL_4 is tested by l2cap 2431 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2432 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2433 if (level >= LEVEL_3){ 2434 // MITM not possible without keyboard or display 2435 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2436 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2437 2438 // MITM possible if one side has keyboard and the other has keyboard or display 2439 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2440 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2441 2442 // MITM not possible if one side has only display and other side has no keyboard 2443 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2444 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2445 } 2446 // LEVEL 2 requires SSP, which is a given 2447 return true; 2448 } 2449 2450 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2451 uint16_t i; 2452 for (i=0; i < size ; i++){ 2453 if (data[i] != 0) { 2454 return false; 2455 } 2456 } 2457 return true; 2458 } 2459 2460 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2461 // get requested security level 2462 gap_security_level_t requested_security_level = conn->requested_security_level; 2463 if (hci_stack->gap_secure_connections_only_mode){ 2464 requested_security_level = LEVEL_4; 2465 } 2466 2467 // assess security: LEVEL 4 requires SC 2468 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2469 if ((requested_security_level == LEVEL_4) && 2470 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2471 !hci_remote_sc_enabled(conn)){ 2472 log_info("Level 4 required, but SC not supported -> abort"); 2473 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2474 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2475 return; 2476 } 2477 2478 // assess security based on io capabilities 2479 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2480 // responder: fully validate io caps of both sides as well as OOB data 2481 bool security_possible = false; 2482 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2483 2484 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2485 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2486 // so we merge the OOB data availability 2487 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2488 if (conn->classic_oob_c_192 != NULL){ 2489 have_oob_data |= 1; 2490 } 2491 if (conn->classic_oob_c_256 != NULL){ 2492 have_oob_data |= 2; 2493 } 2494 // for up to Level 3, either P-192 as well as P-256 will do 2495 // 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 2496 // if remote does not SC, we should not receive P-256 data either 2497 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2498 security_possible = true; 2499 } 2500 // for Level 4, P-256 is needed 2501 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2502 security_possible = true; 2503 } 2504 #endif 2505 2506 if (security_possible == false){ 2507 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2508 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2509 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2510 return; 2511 } 2512 } else { 2513 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2514 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2515 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2516 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2517 log_info("Level 3+ required, but no input/output -> abort"); 2518 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2519 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2520 return; 2521 } 2522 #endif 2523 #endif 2524 } 2525 2526 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2527 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2528 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2529 } else { 2530 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2531 } 2532 #endif 2533 } 2534 2535 #endif 2536 2537 static void event_handler(uint8_t *packet, uint16_t size){ 2538 2539 uint16_t event_length = packet[1]; 2540 2541 // assert packet is complete 2542 if (size != (event_length + 2u)){ 2543 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2544 return; 2545 } 2546 2547 bd_addr_type_t addr_type; 2548 hci_con_handle_t handle; 2549 hci_connection_t * conn; 2550 int i; 2551 int create_connection_cmd; 2552 2553 #ifdef ENABLE_CLASSIC 2554 hci_link_type_t link_type; 2555 bd_addr_t addr; 2556 #endif 2557 2558 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2559 2560 switch (hci_event_packet_get_type(packet)) { 2561 2562 case HCI_EVENT_COMMAND_COMPLETE: 2563 handle_command_complete_event(packet, size); 2564 break; 2565 2566 case HCI_EVENT_COMMAND_STATUS: 2567 // get num cmd packets - limit to 1 to reduce complexity 2568 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2569 2570 // check command status to detected failed outgoing connections 2571 create_connection_cmd = 0; 2572 #ifdef ENABLE_CLASSIC 2573 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2574 create_connection_cmd = 1; 2575 } 2576 #endif 2577 #ifdef ENABLE_LE_CENTRAL 2578 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2579 create_connection_cmd = 1; 2580 } 2581 #endif 2582 if (create_connection_cmd) { 2583 uint8_t status = hci_event_command_status_get_status(packet); 2584 addr_type = hci_stack->outgoing_addr_type; 2585 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2586 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); 2587 2588 // reset outgoing address info 2589 memset(hci_stack->outgoing_addr, 0, 6); 2590 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2591 2592 // on error 2593 if (status != ERROR_CODE_SUCCESS){ 2594 #ifdef ENABLE_LE_CENTRAL 2595 if (hci_is_le_connection_type(addr_type)){ 2596 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2597 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2598 } 2599 #endif 2600 // error => outgoing connection failed 2601 if (conn != NULL){ 2602 hci_handle_connection_failed(conn, status); 2603 } 2604 } 2605 } 2606 2607 #ifdef ENABLE_CLASSIC 2608 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2609 uint8_t status = hci_event_command_status_get_status(packet); 2610 log_info("command status (inquiry), status %x", status); 2611 if (status == ERROR_CODE_SUCCESS) { 2612 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2613 } else { 2614 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2615 } 2616 } 2617 #endif 2618 break; 2619 2620 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2621 if (size < 3) return; 2622 uint16_t num_handles = packet[2]; 2623 if (size != (3u + num_handles * 4u)) return; 2624 uint16_t offset = 3; 2625 for (i=0; i<num_handles;i++){ 2626 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2627 offset += 2u; 2628 uint16_t num_packets = little_endian_read_16(packet, offset); 2629 offset += 2u; 2630 2631 conn = hci_connection_for_handle(handle); 2632 if (!conn){ 2633 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2634 continue; 2635 } 2636 2637 if (conn->num_packets_sent >= num_packets){ 2638 conn->num_packets_sent -= num_packets; 2639 } else { 2640 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2641 conn->num_packets_sent = 0; 2642 } 2643 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2644 2645 #ifdef ENABLE_CLASSIC 2646 // For SCO, we do the can_send_now_check here 2647 hci_notify_if_sco_can_send_now(); 2648 #endif 2649 } 2650 break; 2651 } 2652 2653 #ifdef ENABLE_CLASSIC 2654 case HCI_EVENT_INQUIRY_COMPLETE: 2655 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2656 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2657 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2658 hci_emit_event(event, sizeof(event), 1); 2659 } 2660 break; 2661 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2662 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2663 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2664 } 2665 break; 2666 case HCI_EVENT_CONNECTION_REQUEST: 2667 reverse_bd_addr(&packet[2], addr); 2668 link_type = (hci_link_type_t) packet[11]; 2669 2670 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2671 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2672 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2673 bd_addr_copy(hci_stack->decline_addr, addr); 2674 break; 2675 } 2676 2677 if (hci_stack->gap_classic_accept_callback != NULL){ 2678 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2679 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2680 bd_addr_copy(hci_stack->decline_addr, addr); 2681 break; 2682 } 2683 } 2684 2685 // TODO: eval COD 8-10 2686 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2687 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2688 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2689 if (!conn) { 2690 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2691 } 2692 if (!conn) { 2693 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2694 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2695 bd_addr_copy(hci_stack->decline_addr, addr); 2696 break; 2697 } 2698 conn->role = HCI_ROLE_SLAVE; 2699 conn->state = RECEIVED_CONNECTION_REQUEST; 2700 // store info about eSCO 2701 if (link_type == HCI_LINK_TYPE_ESCO){ 2702 conn->remote_supported_features[0] |= 1; 2703 } 2704 hci_run(); 2705 break; 2706 2707 case HCI_EVENT_CONNECTION_COMPLETE: 2708 // Connection management 2709 reverse_bd_addr(&packet[5], addr); 2710 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2711 addr_type = BD_ADDR_TYPE_ACL; 2712 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2713 if (conn) { 2714 if (!packet[2]){ 2715 conn->state = OPEN; 2716 conn->con_handle = little_endian_read_16(packet, 3); 2717 2718 // queue get remote feature 2719 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2720 2721 // queue set supervision timeout if we're master 2722 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2723 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2724 } 2725 2726 // restart timer 2727 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2728 btstack_run_loop_add_timer(&conn->timeout); 2729 2730 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2731 2732 hci_emit_nr_connections_changed(); 2733 } else { 2734 // connection failed 2735 hci_handle_connection_failed(conn, packet[2]); 2736 } 2737 } 2738 break; 2739 2740 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2741 reverse_bd_addr(&packet[5], addr); 2742 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2743 if (packet[2]){ 2744 // connection failed 2745 break; 2746 } 2747 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2748 if (!conn) { 2749 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2750 } 2751 if (!conn) { 2752 break; 2753 } 2754 conn->state = OPEN; 2755 conn->con_handle = little_endian_read_16(packet, 3); 2756 2757 #ifdef ENABLE_SCO_OVER_HCI 2758 // update SCO 2759 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2760 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2761 } 2762 // trigger can send now 2763 if (hci_have_usb_transport()){ 2764 hci_stack->sco_can_send_now = true; 2765 } 2766 #endif 2767 #ifdef HAVE_SCO_TRANSPORT 2768 // configure sco transport 2769 if (hci_stack->sco_transport != NULL){ 2770 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2771 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2772 } 2773 #endif 2774 break; 2775 2776 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2777 handle = little_endian_read_16(packet, 3); 2778 conn = hci_connection_for_handle(handle); 2779 if (!conn) break; 2780 if (!packet[2]){ 2781 const uint8_t * features = &packet[5]; 2782 hci_handle_remote_features_page_0(conn, features); 2783 2784 // read extended features if possible 2785 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2786 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2787 break; 2788 } 2789 } 2790 hci_handle_remote_features_received(conn); 2791 break; 2792 2793 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2794 handle = little_endian_read_16(packet, 3); 2795 conn = hci_connection_for_handle(handle); 2796 if (!conn) break; 2797 // status = ok, page = 1 2798 if (!packet[2]) { 2799 uint8_t page_number = packet[5]; 2800 uint8_t maximum_page_number = packet[6]; 2801 const uint8_t * features = &packet[7]; 2802 bool done = false; 2803 switch (page_number){ 2804 case 1: 2805 hci_handle_remote_features_page_1(conn, features); 2806 if (maximum_page_number >= 2){ 2807 // get Secure Connections (Controller) from Page 2 if available 2808 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2809 } else { 2810 // otherwise, assume SC (Controller) == SC (Host) 2811 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2812 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2813 } 2814 done = true; 2815 } 2816 break; 2817 case 2: 2818 hci_handle_remote_features_page_2(conn, features); 2819 done = true; 2820 break; 2821 default: 2822 break; 2823 } 2824 if (!done) break; 2825 } 2826 hci_handle_remote_features_received(conn); 2827 break; 2828 2829 case HCI_EVENT_LINK_KEY_REQUEST: 2830 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2831 hci_event_link_key_request_get_bd_addr(packet, addr); 2832 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2833 if (!conn) break; 2834 2835 // lookup link key in db if not cached 2836 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2837 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2838 } 2839 2840 // response sent by hci_run() 2841 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2842 #endif 2843 break; 2844 2845 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2846 hci_event_link_key_request_get_bd_addr(packet, addr); 2847 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2848 if (!conn) break; 2849 2850 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2851 2852 // CVE-2020-26555: ignore NULL link key 2853 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2854 if (btstack_is_null(&packet[8], 16)) break; 2855 2856 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2857 // Change Connection Encryption keeps link key type 2858 if (link_key_type != CHANGED_COMBINATION_KEY){ 2859 conn->link_key_type = link_key_type; 2860 } 2861 2862 // cache link key. link keys stored in little-endian format for legacy reasons 2863 memcpy(&conn->link_key, &packet[8], 16); 2864 2865 // only store link key: 2866 // - if bondable enabled 2867 if (hci_stack->bondable == false) break; 2868 // - if security level sufficient 2869 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2870 // - for SSP, also check if remote side requested bonding as well 2871 if (conn->link_key_type != COMBINATION_KEY){ 2872 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2873 if (!remote_bonding){ 2874 break; 2875 } 2876 } 2877 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2878 break; 2879 } 2880 2881 case HCI_EVENT_PIN_CODE_REQUEST: 2882 hci_event_pin_code_request_get_bd_addr(packet, addr); 2883 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2884 if (!conn) break; 2885 2886 hci_pairing_started(conn, false); 2887 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2888 if (!hci_stack->bondable ){ 2889 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2890 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2891 hci_run(); 2892 return; 2893 } 2894 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2895 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2896 log_info("Level 4 required, but SC not supported -> abort"); 2897 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2898 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2899 hci_run(); 2900 return; 2901 } 2902 break; 2903 2904 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2905 hci_event_io_capability_response_get_bd_addr(packet, addr); 2906 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2907 if (!conn) break; 2908 2909 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2910 hci_pairing_started(conn, true); 2911 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2912 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2913 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2914 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2915 #endif 2916 break; 2917 2918 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2919 hci_event_io_capability_response_get_bd_addr(packet, addr); 2920 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2921 if (!conn) break; 2922 2923 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2924 hci_connection_timestamp(conn); 2925 hci_pairing_started(conn, true); 2926 break; 2927 2928 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2929 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2930 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2931 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2932 if (!conn) break; 2933 2934 hci_connection_timestamp(conn); 2935 2936 hci_pairing_started(conn, true); 2937 2938 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2939 break; 2940 #endif 2941 2942 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2943 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2944 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2945 if (!conn) break; 2946 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2947 if (hci_stack->ssp_auto_accept){ 2948 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2949 }; 2950 } else { 2951 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2952 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2953 // don't forward event to app 2954 hci_run(); 2955 return; 2956 } 2957 break; 2958 2959 case HCI_EVENT_USER_PASSKEY_REQUEST: 2960 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2961 if (hci_stack->ssp_auto_accept){ 2962 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2963 }; 2964 break; 2965 2966 case HCI_EVENT_MODE_CHANGE: 2967 handle = hci_event_mode_change_get_handle(packet); 2968 conn = hci_connection_for_handle(handle); 2969 if (!conn) break; 2970 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2971 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2972 break; 2973 #endif 2974 2975 case HCI_EVENT_ENCRYPTION_CHANGE: 2976 handle = hci_event_encryption_change_get_connection_handle(packet); 2977 conn = hci_connection_for_handle(handle); 2978 if (!conn) break; 2979 if (hci_event_encryption_change_get_status(packet) == 0u) { 2980 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2981 if (encryption_enabled){ 2982 if (hci_is_le_connection(conn)){ 2983 // For LE, we accept connection as encrypted 2984 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2985 } 2986 #ifdef ENABLE_CLASSIC 2987 else { 2988 2989 // dedicated bonding: send result and disconnect 2990 if (conn->bonding_flags & BONDING_DEDICATED){ 2991 conn->bonding_flags &= ~BONDING_DEDICATED; 2992 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2993 conn->bonding_status = packet[2]; 2994 break; 2995 } 2996 2997 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2998 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2999 bool connected_uses_aes_ccm = encryption_enabled == 2; 3000 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3001 log_info("SC during pairing, but only E0 now -> abort"); 3002 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3003 break; 3004 } 3005 3006 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3007 if (connected_uses_aes_ccm){ 3008 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3009 } 3010 3011 #ifdef ENABLE_TESTING_SUPPORT 3012 // work around for issue with PTS dongle 3013 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3014 #endif 3015 3016 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3017 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3018 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3019 } else { 3020 // if not, pretend everything is perfect 3021 hci_handle_read_encryption_key_size_complete(conn, 16); 3022 } 3023 } 3024 #endif 3025 } else { 3026 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3027 } 3028 } 3029 3030 break; 3031 3032 #ifdef ENABLE_CLASSIC 3033 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3034 handle = hci_event_authentication_complete_get_connection_handle(packet); 3035 conn = hci_connection_for_handle(handle); 3036 if (!conn) break; 3037 3038 // clear authentication active flag 3039 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3040 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3041 3042 // authenticated only if auth status == 0 3043 if (hci_event_authentication_complete_get_status(packet) == 0){ 3044 // authenticated 3045 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3046 3047 // If not already encrypted, start encryption 3048 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3049 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3050 break; 3051 } 3052 } 3053 3054 // emit updated security level 3055 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3056 break; 3057 3058 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3059 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3060 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3061 if (!conn) break; 3062 3063 // treat successfully paired connection as authenticated 3064 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3065 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3066 } 3067 3068 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3069 break; 3070 #endif 3071 3072 // HCI_EVENT_DISCONNECTION_COMPLETE 3073 // has been split, to first notify stack before shutting connection down 3074 // see end of function, too. 3075 case HCI_EVENT_DISCONNECTION_COMPLETE: 3076 if (packet[2]) break; // status != 0 3077 handle = little_endian_read_16(packet, 3); 3078 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3079 if (hci_stack->acl_fragmentation_total_size > 0u) { 3080 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3081 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3082 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3083 hci_stack->acl_fragmentation_total_size = 0; 3084 hci_stack->acl_fragmentation_pos = 0; 3085 if (release_buffer){ 3086 hci_release_packet_buffer(); 3087 } 3088 } 3089 } 3090 3091 conn = hci_connection_for_handle(handle); 3092 if (!conn) break; 3093 #ifdef ENABLE_CLASSIC 3094 // pairing failed if it was ongoing 3095 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3096 #endif 3097 3098 // emit dedicatd bonding event 3099 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3100 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3101 } 3102 3103 // mark connection for shutdown, stop timers, reset state 3104 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3105 hci_connection_stop_timer(conn); 3106 hci_connection_init(conn); 3107 3108 #ifdef ENABLE_BLE 3109 #ifdef ENABLE_LE_PERIPHERAL 3110 // re-enable advertisements for le connections if active 3111 if (hci_is_le_connection(conn)){ 3112 hci_update_advertisements_enabled_for_current_roles(); 3113 } 3114 #endif 3115 #endif 3116 break; 3117 3118 case HCI_EVENT_HARDWARE_ERROR: 3119 log_error("Hardware Error: 0x%02x", packet[2]); 3120 if (hci_stack->hardware_error_callback){ 3121 (*hci_stack->hardware_error_callback)(packet[2]); 3122 } else { 3123 // if no special requests, just reboot stack 3124 hci_power_control_off(); 3125 hci_power_control_on(); 3126 } 3127 break; 3128 3129 #ifdef ENABLE_CLASSIC 3130 case HCI_EVENT_ROLE_CHANGE: 3131 if (packet[2]) break; // status != 0 3132 reverse_bd_addr(&packet[3], addr); 3133 addr_type = BD_ADDR_TYPE_ACL; 3134 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3135 if (!conn) break; 3136 conn->role = packet[9]; 3137 break; 3138 #endif 3139 3140 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3141 // release packet buffer only for asynchronous transport and if there are not further fragements 3142 if (hci_transport_synchronous()) { 3143 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3144 return; // instead of break: to avoid re-entering hci_run() 3145 } 3146 hci_stack->acl_fragmentation_tx_active = 0; 3147 if (hci_stack->acl_fragmentation_total_size) break; 3148 hci_release_packet_buffer(); 3149 3150 // L2CAP receives this event via the hci_emit_event below 3151 3152 #ifdef ENABLE_CLASSIC 3153 // For SCO, we do the can_send_now_check here 3154 hci_notify_if_sco_can_send_now(); 3155 #endif 3156 break; 3157 3158 #ifdef ENABLE_CLASSIC 3159 case HCI_EVENT_SCO_CAN_SEND_NOW: 3160 // For SCO, we do the can_send_now_check here 3161 hci_stack->sco_can_send_now = true; 3162 hci_notify_if_sco_can_send_now(); 3163 return; 3164 3165 // explode inquriy results for easier consumption 3166 case HCI_EVENT_INQUIRY_RESULT: 3167 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3168 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3169 gap_inquiry_explode(packet, size); 3170 break; 3171 #endif 3172 3173 #ifdef ENABLE_BLE 3174 case HCI_EVENT_LE_META: 3175 switch (packet[2]){ 3176 #ifdef ENABLE_LE_CENTRAL 3177 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3178 // log_info("advertising report received"); 3179 if (!hci_stack->le_scanning_enabled) break; 3180 le_handle_advertisement_report(packet, size); 3181 break; 3182 #endif 3183 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3184 event_handle_le_connection_complete(packet); 3185 break; 3186 3187 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3188 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3189 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3190 conn = hci_connection_for_handle(handle); 3191 if (!conn) break; 3192 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3193 break; 3194 3195 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3196 // connection 3197 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3198 conn = hci_connection_for_handle(handle); 3199 if (conn) { 3200 // read arguments 3201 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3202 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3203 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3204 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3205 3206 // validate against current connection parameter range 3207 le_connection_parameter_range_t existing_range; 3208 gap_get_connection_parameter_range(&existing_range); 3209 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3210 if (update_parameter){ 3211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3212 conn->le_conn_interval_min = le_conn_interval_min; 3213 conn->le_conn_interval_max = le_conn_interval_max; 3214 conn->le_conn_latency = le_conn_latency; 3215 conn->le_supervision_timeout = le_supervision_timeout; 3216 } else { 3217 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3218 } 3219 } 3220 break; 3221 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3222 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3223 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3224 conn = hci_connection_for_handle(handle); 3225 if (conn) { 3226 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3227 } 3228 break; 3229 #endif 3230 default: 3231 break; 3232 } 3233 break; 3234 #endif 3235 case HCI_EVENT_VENDOR_SPECIFIC: 3236 // Vendor specific commands often create vendor specific event instead of num completed packets 3237 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3238 switch (hci_stack->manufacturer){ 3239 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3240 hci_stack->num_cmd_packets = 1; 3241 break; 3242 default: 3243 break; 3244 } 3245 break; 3246 default: 3247 break; 3248 } 3249 3250 handle_event_for_current_stack_state(packet, size); 3251 3252 // notify upper stack 3253 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3254 3255 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3256 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3257 handle = little_endian_read_16(packet, 3); 3258 hci_connection_t * aConn = hci_connection_for_handle(handle); 3259 // discard connection if app did not trigger a reconnect in the event handler 3260 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3261 hci_shutdown_connection(aConn); 3262 } 3263 } 3264 3265 // execute main loop 3266 hci_run(); 3267 } 3268 3269 #ifdef ENABLE_CLASSIC 3270 3271 #ifdef ENABLE_SCO_OVER_HCI 3272 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3273 static void sco_schedule_tx(hci_connection_t * conn); 3274 3275 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3276 log_debug("SCO TX Timeout"); 3277 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3278 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3279 if (!conn) return; 3280 3281 // trigger send 3282 conn->sco_tx_ready = 1; 3283 // extra packet if CVSD but SCO buffer is too short 3284 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3285 conn->sco_tx_ready++; 3286 } 3287 hci_notify_if_sco_can_send_now(); 3288 } 3289 3290 3291 #define SCO_TX_AFTER_RX_MS (6) 3292 3293 static void sco_schedule_tx(hci_connection_t * conn){ 3294 3295 uint32_t now = btstack_run_loop_get_time_ms(); 3296 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3297 int time_delta_ms = sco_tx_ms - now; 3298 3299 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3300 3301 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3302 btstack_run_loop_remove_timer(timer); 3303 btstack_run_loop_set_timer(timer, time_delta_ms); 3304 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3305 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3306 btstack_run_loop_add_timer(timer); 3307 } 3308 #endif 3309 3310 static void sco_handler(uint8_t * packet, uint16_t size){ 3311 // lookup connection struct 3312 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3313 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3314 if (!conn) return; 3315 3316 #ifdef ENABLE_SCO_OVER_HCI 3317 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3318 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3319 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3320 packet[2] = 0x3c; 3321 memmove(&packet[3], &packet[23], 63); 3322 size = 63; 3323 } 3324 } 3325 3326 if (hci_have_usb_transport()){ 3327 // Nothing to do 3328 } else { 3329 // 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); 3330 if (hci_stack->synchronous_flow_control_enabled == 0){ 3331 uint32_t now = btstack_run_loop_get_time_ms(); 3332 3333 if (!conn->sco_rx_valid){ 3334 // ignore first 10 packets 3335 conn->sco_rx_count++; 3336 // log_debug("sco rx count %u", conn->sco_rx_count); 3337 if (conn->sco_rx_count == 10) { 3338 // use first timestamp as is and pretent it just started 3339 conn->sco_rx_ms = now; 3340 conn->sco_rx_valid = 1; 3341 conn->sco_rx_count = 0; 3342 sco_schedule_tx(conn); 3343 } 3344 } else { 3345 // track expected arrival timme 3346 conn->sco_rx_count++; 3347 conn->sco_rx_ms += 7; 3348 int delta = (int32_t) (now - conn->sco_rx_ms); 3349 if (delta > 0){ 3350 conn->sco_rx_ms++; 3351 } 3352 // log_debug("sco rx %u", conn->sco_rx_ms); 3353 sco_schedule_tx(conn); 3354 } 3355 } 3356 } 3357 #endif 3358 3359 // deliver to app 3360 if (hci_stack->sco_packet_handler) { 3361 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3362 } 3363 3364 #ifdef HAVE_SCO_TRANSPORT 3365 // We can send one packet for each received packet 3366 conn->sco_tx_ready++; 3367 hci_notify_if_sco_can_send_now(); 3368 #endif 3369 3370 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3371 conn->num_packets_completed++; 3372 hci_stack->host_completed_packets = 1; 3373 hci_run(); 3374 #endif 3375 } 3376 #endif 3377 3378 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3379 hci_dump_packet(packet_type, 1, packet, size); 3380 switch (packet_type) { 3381 case HCI_EVENT_PACKET: 3382 event_handler(packet, size); 3383 break; 3384 case HCI_ACL_DATA_PACKET: 3385 acl_handler(packet, size); 3386 break; 3387 #ifdef ENABLE_CLASSIC 3388 case HCI_SCO_DATA_PACKET: 3389 sco_handler(packet, size); 3390 break; 3391 #endif 3392 default: 3393 break; 3394 } 3395 } 3396 3397 /** 3398 * @brief Add event packet handler. 3399 */ 3400 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3401 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3402 } 3403 3404 3405 /** Register HCI packet handlers */ 3406 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3407 hci_stack->acl_packet_handler = handler; 3408 } 3409 3410 #ifdef ENABLE_CLASSIC 3411 /** 3412 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3413 */ 3414 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3415 hci_stack->sco_packet_handler = handler; 3416 } 3417 #endif 3418 3419 static void hci_state_reset(void){ 3420 // no connections yet 3421 hci_stack->connections = NULL; 3422 3423 // keep discoverable/connectable as this has been requested by the client(s) 3424 // hci_stack->discoverable = 0; 3425 // hci_stack->connectable = 0; 3426 // hci_stack->bondable = 1; 3427 // hci_stack->own_addr_type = 0; 3428 3429 // buffer is free 3430 hci_stack->hci_packet_buffer_reserved = false; 3431 3432 // no pending cmds 3433 hci_stack->decline_reason = 0; 3434 hci_stack->new_scan_enable_value = 0xff; 3435 3436 hci_stack->secure_connections_active = false; 3437 3438 #ifdef ENABLE_CLASSIC 3439 hci_stack->new_page_scan_interval = 0xffff; 3440 hci_stack->new_page_scan_window = 0xffff; 3441 hci_stack->new_page_scan_type = 0xff; 3442 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3443 hci_stack->gap_tasks = 3444 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3445 GAP_TASK_SET_CLASS_OF_DEVICE | 3446 GAP_TASK_SET_LOCAL_NAME | 3447 GAP_TASK_SET_EIR_DATA; 3448 #endif 3449 3450 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3451 hci_stack->classic_read_local_oob_data = true; 3452 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3453 #endif 3454 3455 // LE 3456 #ifdef ENABLE_BLE 3457 memset(hci_stack->le_random_address, 0, 6); 3458 hci_stack->le_random_address_set = 0; 3459 #endif 3460 #ifdef ENABLE_LE_CENTRAL 3461 hci_stack->le_scanning_active = false; 3462 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3463 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3464 hci_stack->le_whitelist_capacity = 0; 3465 #endif 3466 #ifdef ENABLE_LE_PERIPHERAL 3467 hci_stack->le_advertisements_active = false; 3468 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3469 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3470 } 3471 if (hci_stack->le_advertisements_data != NULL){ 3472 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3473 } 3474 #endif 3475 } 3476 3477 #ifdef ENABLE_CLASSIC 3478 /** 3479 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3480 */ 3481 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3482 // store and open remote device db 3483 hci_stack->link_key_db = link_key_db; 3484 if (hci_stack->link_key_db) { 3485 hci_stack->link_key_db->open(); 3486 } 3487 } 3488 #endif 3489 3490 void hci_init(const hci_transport_t *transport, const void *config){ 3491 3492 #ifdef HAVE_MALLOC 3493 if (!hci_stack) { 3494 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3495 } 3496 #else 3497 hci_stack = &hci_stack_static; 3498 #endif 3499 memset(hci_stack, 0, sizeof(hci_stack_t)); 3500 3501 // reference to use transport layer implementation 3502 hci_stack->hci_transport = transport; 3503 3504 // reference to used config 3505 hci_stack->config = config; 3506 3507 // setup pointer for outgoing packet buffer 3508 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3509 3510 // max acl payload size defined in config.h 3511 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3512 3513 // register packet handlers with transport 3514 transport->register_packet_handler(&packet_handler); 3515 3516 hci_stack->state = HCI_STATE_OFF; 3517 3518 // class of device 3519 hci_stack->class_of_device = 0x007a020c; // Smartphone 3520 3521 // bondable by default 3522 hci_stack->bondable = 1; 3523 3524 #ifdef ENABLE_CLASSIC 3525 // classic name 3526 hci_stack->local_name = default_classic_name; 3527 3528 // Master slave policy 3529 hci_stack->master_slave_policy = 1; 3530 3531 // Allow Role Switch 3532 hci_stack->allow_role_switch = 1; 3533 3534 // Default / minimum security level = 2 3535 hci_stack->gap_security_level = LEVEL_2; 3536 3537 // Default Security Mode 4 3538 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3539 3540 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3541 hci_stack->gap_required_encyrption_key_size = 7; 3542 3543 // Link Supervision Timeout 3544 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3545 3546 #endif 3547 3548 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3549 hci_stack->ssp_enable = 1; 3550 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3551 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3552 hci_stack->ssp_auto_accept = 1; 3553 3554 // Secure Connections: enable (requires support from Controller) 3555 hci_stack->secure_connections_enable = true; 3556 3557 // voice setting - signed 16 bit pcm data with CVSD over the air 3558 hci_stack->sco_voice_setting = 0x60; 3559 3560 #ifdef ENABLE_LE_CENTRAL 3561 // connection parameter to use for outgoing connections 3562 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3563 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3564 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3565 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3566 hci_stack->le_connection_latency = 4; // 4 3567 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3568 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3569 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3570 3571 // default LE Scanning 3572 hci_stack->le_scan_type = 0x1; // active 3573 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3574 hci_stack->le_scan_window = 0x30; // 30 ms 3575 #endif 3576 3577 #ifdef ENABLE_LE_PERIPHERAL 3578 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3579 #endif 3580 3581 // connection parameter range used to answer connection parameter update requests in l2cap 3582 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3583 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3584 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3585 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3586 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3587 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3588 3589 hci_state_reset(); 3590 } 3591 3592 void hci_deinit(void){ 3593 #ifdef HAVE_MALLOC 3594 if (hci_stack) { 3595 free(hci_stack); 3596 } 3597 #endif 3598 hci_stack = NULL; 3599 3600 #ifdef ENABLE_CLASSIC 3601 disable_l2cap_timeouts = 0; 3602 #endif 3603 } 3604 3605 /** 3606 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3607 */ 3608 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3609 hci_stack->chipset = chipset_driver; 3610 3611 // reset chipset driver - init is also called on power_up 3612 if (hci_stack->chipset && hci_stack->chipset->init){ 3613 hci_stack->chipset->init(hci_stack->config); 3614 } 3615 } 3616 3617 /** 3618 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3619 */ 3620 void hci_set_control(const btstack_control_t *hardware_control){ 3621 // references to used control implementation 3622 hci_stack->control = hardware_control; 3623 // init with transport config 3624 hardware_control->init(hci_stack->config); 3625 } 3626 3627 void hci_close(void){ 3628 3629 #ifdef ENABLE_CLASSIC 3630 // close remote device db 3631 if (hci_stack->link_key_db) { 3632 hci_stack->link_key_db->close(); 3633 } 3634 #endif 3635 3636 btstack_linked_list_iterator_t lit; 3637 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3638 while (btstack_linked_list_iterator_has_next(&lit)){ 3639 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3640 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3641 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3642 hci_shutdown_connection(connection); 3643 } 3644 3645 hci_power_control(HCI_POWER_OFF); 3646 3647 #ifdef HAVE_MALLOC 3648 free(hci_stack); 3649 #endif 3650 hci_stack = NULL; 3651 } 3652 3653 #ifdef HAVE_SCO_TRANSPORT 3654 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3655 hci_stack->sco_transport = sco_transport; 3656 sco_transport->register_packet_handler(&packet_handler); 3657 } 3658 #endif 3659 3660 #ifdef ENABLE_CLASSIC 3661 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3662 // validate ranage and set 3663 if (encryption_key_size < 7) return; 3664 if (encryption_key_size > 16) return; 3665 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3666 } 3667 3668 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3669 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3670 hci_stack->gap_security_mode = security_mode; 3671 return ERROR_CODE_SUCCESS; 3672 } else { 3673 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3674 } 3675 } 3676 3677 gap_security_mode_t gap_get_security_mode(void){ 3678 return hci_stack->gap_security_mode; 3679 } 3680 3681 void gap_set_security_level(gap_security_level_t security_level){ 3682 hci_stack->gap_security_level = security_level; 3683 } 3684 3685 gap_security_level_t gap_get_security_level(void){ 3686 if (hci_stack->gap_secure_connections_only_mode){ 3687 return LEVEL_4; 3688 } 3689 return hci_stack->gap_security_level; 3690 } 3691 3692 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3693 hci_stack->gap_minimal_service_security_level = security_level; 3694 } 3695 3696 void gap_set_secure_connections_only_mode(bool enable){ 3697 hci_stack->gap_secure_connections_only_mode = enable; 3698 } 3699 3700 bool gap_get_secure_connections_only_mode(void){ 3701 return hci_stack->gap_secure_connections_only_mode; 3702 } 3703 #endif 3704 3705 #ifdef ENABLE_CLASSIC 3706 void gap_set_class_of_device(uint32_t class_of_device){ 3707 hci_stack->class_of_device = class_of_device; 3708 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3709 hci_run(); 3710 } 3711 3712 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3713 hci_stack->default_link_policy_settings = default_link_policy_settings; 3714 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3715 hci_run(); 3716 } 3717 3718 void gap_set_allow_role_switch(bool allow_role_switch){ 3719 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3720 } 3721 3722 uint8_t hci_get_allow_role_switch(void){ 3723 return hci_stack->allow_role_switch; 3724 } 3725 3726 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3727 hci_stack->link_supervision_timeout = link_supervision_timeout; 3728 } 3729 3730 void hci_disable_l2cap_timeout_check(void){ 3731 disable_l2cap_timeouts = 1; 3732 } 3733 #endif 3734 3735 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3736 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3737 void hci_set_bd_addr(bd_addr_t addr){ 3738 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3739 hci_stack->custom_bd_addr_set = 1; 3740 } 3741 #endif 3742 3743 // State-Module-Driver overview 3744 // state module low-level 3745 // HCI_STATE_OFF off close 3746 // HCI_STATE_INITIALIZING, on open 3747 // HCI_STATE_WORKING, on open 3748 // HCI_STATE_HALTING, on open 3749 // HCI_STATE_SLEEPING, off/sleep close 3750 // HCI_STATE_FALLING_ASLEEP on open 3751 3752 static int hci_power_control_on(void){ 3753 3754 // power on 3755 int err = 0; 3756 if (hci_stack->control && hci_stack->control->on){ 3757 err = (*hci_stack->control->on)(); 3758 } 3759 if (err){ 3760 log_error( "POWER_ON failed"); 3761 hci_emit_hci_open_failed(); 3762 return err; 3763 } 3764 3765 // int chipset driver 3766 if (hci_stack->chipset && hci_stack->chipset->init){ 3767 hci_stack->chipset->init(hci_stack->config); 3768 } 3769 3770 // init transport 3771 if (hci_stack->hci_transport->init){ 3772 hci_stack->hci_transport->init(hci_stack->config); 3773 } 3774 3775 // open transport 3776 err = hci_stack->hci_transport->open(); 3777 if (err){ 3778 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3779 if (hci_stack->control && hci_stack->control->off){ 3780 (*hci_stack->control->off)(); 3781 } 3782 hci_emit_hci_open_failed(); 3783 return err; 3784 } 3785 return 0; 3786 } 3787 3788 static void hci_power_control_off(void){ 3789 3790 log_info("hci_power_control_off"); 3791 3792 // close low-level device 3793 hci_stack->hci_transport->close(); 3794 3795 log_info("hci_power_control_off - hci_transport closed"); 3796 3797 // power off 3798 if (hci_stack->control && hci_stack->control->off){ 3799 (*hci_stack->control->off)(); 3800 } 3801 3802 log_info("hci_power_control_off - control closed"); 3803 3804 hci_stack->state = HCI_STATE_OFF; 3805 } 3806 3807 static void hci_power_control_sleep(void){ 3808 3809 log_info("hci_power_control_sleep"); 3810 3811 #if 0 3812 // don't close serial port during sleep 3813 3814 // close low-level device 3815 hci_stack->hci_transport->close(hci_stack->config); 3816 #endif 3817 3818 // sleep mode 3819 if (hci_stack->control && hci_stack->control->sleep){ 3820 (*hci_stack->control->sleep)(); 3821 } 3822 3823 hci_stack->state = HCI_STATE_SLEEPING; 3824 } 3825 3826 static int hci_power_control_wake(void){ 3827 3828 log_info("hci_power_control_wake"); 3829 3830 // wake on 3831 if (hci_stack->control && hci_stack->control->wake){ 3832 (*hci_stack->control->wake)(); 3833 } 3834 3835 #if 0 3836 // open low-level device 3837 int err = hci_stack->hci_transport->open(hci_stack->config); 3838 if (err){ 3839 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3840 if (hci_stack->control && hci_stack->control->off){ 3841 (*hci_stack->control->off)(); 3842 } 3843 hci_emit_hci_open_failed(); 3844 return err; 3845 } 3846 #endif 3847 3848 return 0; 3849 } 3850 3851 static void hci_power_transition_to_initializing(void){ 3852 // set up state machine 3853 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3854 hci_stack->hci_packet_buffer_reserved = false; 3855 hci_stack->state = HCI_STATE_INITIALIZING; 3856 hci_stack->substate = HCI_INIT_SEND_RESET; 3857 } 3858 3859 // returns error 3860 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3861 int err; 3862 switch (power_mode){ 3863 case HCI_POWER_ON: 3864 err = hci_power_control_on(); 3865 if (err != 0) { 3866 log_error("hci_power_control_on() error %d", err); 3867 return err; 3868 } 3869 hci_power_transition_to_initializing(); 3870 break; 3871 case HCI_POWER_OFF: 3872 // do nothing 3873 break; 3874 case HCI_POWER_SLEEP: 3875 // do nothing (with SLEEP == OFF) 3876 break; 3877 default: 3878 btstack_assert(false); 3879 break; 3880 } 3881 return ERROR_CODE_SUCCESS; 3882 } 3883 3884 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3885 switch (power_mode){ 3886 case HCI_POWER_ON: 3887 // do nothing 3888 break; 3889 case HCI_POWER_OFF: 3890 // no connections yet, just turn it off 3891 hci_power_control_off(); 3892 break; 3893 case HCI_POWER_SLEEP: 3894 // no connections yet, just turn it off 3895 hci_power_control_sleep(); 3896 break; 3897 default: 3898 btstack_assert(false); 3899 break; 3900 } 3901 return ERROR_CODE_SUCCESS; 3902 } 3903 3904 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3905 switch (power_mode){ 3906 case HCI_POWER_ON: 3907 // do nothing 3908 break; 3909 case HCI_POWER_OFF: 3910 // see hci_run 3911 hci_stack->state = HCI_STATE_HALTING; 3912 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3913 break; 3914 case HCI_POWER_SLEEP: 3915 // see hci_run 3916 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3917 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3918 break; 3919 default: 3920 btstack_assert(false); 3921 break; 3922 } 3923 return ERROR_CODE_SUCCESS; 3924 } 3925 3926 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3927 switch (power_mode){ 3928 case HCI_POWER_ON: 3929 hci_power_transition_to_initializing(); 3930 break; 3931 case HCI_POWER_OFF: 3932 // do nothing 3933 break; 3934 case HCI_POWER_SLEEP: 3935 // see hci_run 3936 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3937 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3938 break; 3939 default: 3940 btstack_assert(false); 3941 break; 3942 } 3943 return ERROR_CODE_SUCCESS; 3944 } 3945 3946 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3947 switch (power_mode){ 3948 case HCI_POWER_ON: 3949 3950 #ifdef HAVE_PLATFORM_IPHONE_OS 3951 // nothing to do, if H4 supports power management 3952 if (btstack_control_iphone_power_management_enabled()){ 3953 hci_stack->state = HCI_STATE_INITIALIZING; 3954 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3955 break; 3956 } 3957 #endif 3958 hci_power_transition_to_initializing(); 3959 break; 3960 case HCI_POWER_OFF: 3961 // see hci_run 3962 hci_stack->state = HCI_STATE_HALTING; 3963 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3964 break; 3965 case HCI_POWER_SLEEP: 3966 // do nothing 3967 break; 3968 default: 3969 btstack_assert(false); 3970 break; 3971 } 3972 return ERROR_CODE_SUCCESS; 3973 } 3974 3975 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3976 int err; 3977 switch (power_mode){ 3978 case HCI_POWER_ON: 3979 #ifdef HAVE_PLATFORM_IPHONE_OS 3980 // nothing to do, if H4 supports power management 3981 if (btstack_control_iphone_power_management_enabled()){ 3982 hci_stack->state = HCI_STATE_INITIALIZING; 3983 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3984 hci_update_scan_enable(); 3985 break; 3986 } 3987 #endif 3988 err = hci_power_control_wake(); 3989 if (err) return err; 3990 hci_power_transition_to_initializing(); 3991 break; 3992 case HCI_POWER_OFF: 3993 hci_stack->state = HCI_STATE_HALTING; 3994 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3995 break; 3996 case HCI_POWER_SLEEP: 3997 // do nothing 3998 break; 3999 default: 4000 btstack_assert(false); 4001 break; 4002 } 4003 return ERROR_CODE_SUCCESS; 4004 } 4005 4006 int hci_power_control(HCI_POWER_MODE power_mode){ 4007 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4008 int err = 0; 4009 switch (hci_stack->state){ 4010 case HCI_STATE_OFF: 4011 err = hci_power_control_state_off(power_mode); 4012 break; 4013 case HCI_STATE_INITIALIZING: 4014 err = hci_power_control_state_initializing(power_mode); 4015 break; 4016 case HCI_STATE_WORKING: 4017 err = hci_power_control_state_working(power_mode); 4018 break; 4019 case HCI_STATE_HALTING: 4020 err = hci_power_control_state_halting(power_mode); 4021 break; 4022 case HCI_STATE_FALLING_ASLEEP: 4023 err = hci_power_control_state_falling_asleep(power_mode); 4024 break; 4025 case HCI_STATE_SLEEPING: 4026 err = hci_power_control_state_sleeping(power_mode); 4027 break; 4028 default: 4029 btstack_assert(false); 4030 break; 4031 } 4032 if (err != 0){ 4033 return err; 4034 } 4035 4036 // create internal event 4037 hci_emit_state(); 4038 4039 // trigger next/first action 4040 hci_run(); 4041 4042 return 0; 4043 } 4044 4045 4046 #ifdef ENABLE_CLASSIC 4047 4048 static void hci_update_scan_enable(void){ 4049 // 2 = page scan, 1 = inq scan 4050 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4051 hci_run(); 4052 } 4053 4054 void gap_discoverable_control(uint8_t enable){ 4055 if (enable) enable = 1; // normalize argument 4056 4057 if (hci_stack->discoverable == enable){ 4058 hci_emit_discoverable_enabled(hci_stack->discoverable); 4059 return; 4060 } 4061 4062 hci_stack->discoverable = enable; 4063 hci_update_scan_enable(); 4064 } 4065 4066 void gap_connectable_control(uint8_t enable){ 4067 if (enable) enable = 1; // normalize argument 4068 4069 // don't emit event 4070 if (hci_stack->connectable == enable) return; 4071 4072 hci_stack->connectable = enable; 4073 hci_update_scan_enable(); 4074 } 4075 #endif 4076 4077 void gap_local_bd_addr(bd_addr_t address_buffer){ 4078 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4079 } 4080 4081 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4082 static void hci_host_num_completed_packets(void){ 4083 4084 // create packet manually as arrays are not supported and num_commands should not get reduced 4085 hci_reserve_packet_buffer(); 4086 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4087 4088 uint16_t size = 0; 4089 uint16_t num_handles = 0; 4090 packet[size++] = 0x35; 4091 packet[size++] = 0x0c; 4092 size++; // skip param len 4093 size++; // skip num handles 4094 4095 // add { handle, packets } entries 4096 btstack_linked_item_t * it; 4097 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4098 hci_connection_t * connection = (hci_connection_t *) it; 4099 if (connection->num_packets_completed){ 4100 little_endian_store_16(packet, size, connection->con_handle); 4101 size += 2; 4102 little_endian_store_16(packet, size, connection->num_packets_completed); 4103 size += 2; 4104 // 4105 num_handles++; 4106 connection->num_packets_completed = 0; 4107 } 4108 } 4109 4110 packet[2] = size - 3; 4111 packet[3] = num_handles; 4112 4113 hci_stack->host_completed_packets = 0; 4114 4115 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4116 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4117 4118 // release packet buffer for synchronous transport implementations 4119 if (hci_transport_synchronous()){ 4120 hci_release_packet_buffer(); 4121 hci_emit_transport_packet_sent(); 4122 } 4123 } 4124 #endif 4125 4126 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4127 UNUSED(ds); 4128 hci_stack->substate = HCI_HALTING_CLOSE; 4129 // allow packet handlers to defer final shutdown 4130 hci_emit_state(); 4131 hci_run(); 4132 } 4133 4134 static bool hci_run_acl_fragments(void){ 4135 if (hci_stack->acl_fragmentation_total_size > 0u) { 4136 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4137 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4138 if (connection) { 4139 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4140 hci_send_acl_packet_fragments(connection); 4141 return true; 4142 } 4143 } else { 4144 // connection gone -> discard further fragments 4145 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4146 hci_stack->acl_fragmentation_total_size = 0; 4147 hci_stack->acl_fragmentation_pos = 0; 4148 } 4149 } 4150 return false; 4151 } 4152 4153 #ifdef ENABLE_CLASSIC 4154 static bool hci_run_general_gap_classic(void){ 4155 4156 // assert stack is working and classic is active 4157 if (hci_classic_supported() == false) return false; 4158 if (hci_stack->state != HCI_STATE_WORKING) return false; 4159 4160 // decline incoming connections 4161 if (hci_stack->decline_reason){ 4162 uint8_t reason = hci_stack->decline_reason; 4163 hci_stack->decline_reason = 0; 4164 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4165 return true; 4166 } 4167 4168 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4169 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4170 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4171 return true; 4172 } 4173 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4174 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4175 gap_run_set_local_name(); 4176 return true; 4177 } 4178 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4179 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4180 gap_run_set_eir_data(); 4181 return true; 4182 } 4183 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4184 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4185 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4186 return true; 4187 } 4188 // write page scan activity 4189 if (hci_stack->new_page_scan_interval != 0xffff) { 4190 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4191 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4192 hci_stack->new_page_scan_interval = 0xffff; 4193 hci_stack->new_page_scan_window = 0xffff; 4194 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4195 return true; 4196 } 4197 // write page scan type 4198 if (hci_stack->new_page_scan_type != 0xff) { 4199 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4200 hci_stack->new_page_scan_type = 0xff; 4201 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4202 return true; 4203 } 4204 // send scan enable 4205 if (hci_stack->new_scan_enable_value != 0xff) { 4206 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4207 hci_stack->new_scan_enable_value = 0xff; 4208 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4209 return true; 4210 } 4211 4212 // start/stop inquiry 4213 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4214 uint8_t duration = hci_stack->inquiry_state; 4215 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4216 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4217 return true; 4218 } 4219 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4220 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4221 hci_send_cmd(&hci_inquiry_cancel); 4222 return true; 4223 } 4224 // remote name request 4225 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4226 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4227 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4228 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4229 return true; 4230 } 4231 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4232 // Local OOB data 4233 if (hci_stack->classic_read_local_oob_data){ 4234 hci_stack->classic_read_local_oob_data = false; 4235 if (hci_stack->local_supported_commands[1] & 0x10u){ 4236 hci_send_cmd(&hci_read_local_extended_oob_data); 4237 } else { 4238 hci_send_cmd(&hci_read_local_oob_data); 4239 } 4240 } 4241 #endif 4242 // pairing 4243 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4244 uint8_t state = hci_stack->gap_pairing_state; 4245 uint8_t pin_code[16]; 4246 switch (state){ 4247 case GAP_PAIRING_STATE_SEND_PIN: 4248 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4249 memset(pin_code, 0, 16); 4250 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4251 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4252 break; 4253 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4254 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4255 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4256 break; 4257 case GAP_PAIRING_STATE_SEND_PASSKEY: 4258 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4259 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4260 break; 4261 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4262 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4263 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4264 break; 4265 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4266 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4267 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4268 break; 4269 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4270 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4271 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4272 break; 4273 default: 4274 break; 4275 } 4276 return true; 4277 } 4278 return false; 4279 } 4280 #endif 4281 4282 #ifdef ENABLE_BLE 4283 static bool hci_run_general_gap_le(void){ 4284 4285 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4286 4287 if (hci_stack->state != HCI_STATE_WORKING) return false; 4288 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4289 4290 4291 // Phase 1: collect what to stop 4292 4293 bool scanning_stop = false; 4294 bool connecting_stop = false; 4295 bool advertising_stop = false; 4296 4297 #ifndef ENABLE_LE_CENTRAL 4298 UNUSED(scanning_stop); 4299 UNUSED(connecting_stop); 4300 #endif 4301 #ifndef ENABLE_LE_PERIPHERAL 4302 UNUSED(advertising_stop); 4303 #endif 4304 4305 // check if whitelist needs modification 4306 bool whitelist_modification_pending = false; 4307 btstack_linked_list_iterator_t lit; 4308 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4309 while (btstack_linked_list_iterator_has_next(&lit)){ 4310 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4311 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4312 whitelist_modification_pending = true; 4313 break; 4314 } 4315 } 4316 // check if resolving list needs modification 4317 bool resolving_list_modification_pending = false; 4318 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4319 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4320 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4321 resolving_list_modification_pending = true; 4322 } 4323 #endif 4324 4325 #ifdef ENABLE_LE_CENTRAL 4326 // scanning control 4327 if (hci_stack->le_scanning_active) { 4328 // stop if: 4329 // - parameter change required 4330 // - it's disabled 4331 // - whitelist change required but used for scanning 4332 // - resolving list modified 4333 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4334 if ((hci_stack->le_scanning_param_update) || 4335 !hci_stack->le_scanning_enabled || 4336 scanning_uses_whitelist || 4337 resolving_list_modification_pending){ 4338 4339 scanning_stop = true; 4340 } 4341 } 4342 #endif 4343 4344 #ifdef ENABLE_LE_CENTRAL 4345 // connecting control 4346 bool connecting_with_whitelist; 4347 switch (hci_stack->le_connecting_state){ 4348 case LE_CONNECTING_DIRECT: 4349 case LE_CONNECTING_WHITELIST: 4350 // stop connecting if: 4351 // - connecting uses white and whitelist modification pending 4352 // - if it got disabled 4353 // - resolving list modified 4354 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4355 if ((connecting_with_whitelist && whitelist_modification_pending) || 4356 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4357 resolving_list_modification_pending) { 4358 4359 connecting_stop = true; 4360 } 4361 break; 4362 default: 4363 break; 4364 } 4365 #endif 4366 4367 #ifdef ENABLE_LE_PERIPHERAL 4368 // le advertisement control 4369 if (hci_stack->le_advertisements_active){ 4370 // stop if: 4371 // - parameter change required 4372 // - it's disabled 4373 // - whitelist change required but used for advertisement filter policy 4374 // - resolving list modified 4375 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4376 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4377 if (advertising_change || 4378 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4379 (advertising_uses_whitelist & whitelist_modification_pending) || 4380 resolving_list_modification_pending) { 4381 4382 advertising_stop = true; 4383 } 4384 } 4385 #endif 4386 4387 4388 // Phase 2: stop everything that should be off during modifications 4389 4390 #ifdef ENABLE_LE_CENTRAL 4391 if (scanning_stop){ 4392 hci_stack->le_scanning_active = false; 4393 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4394 return true; 4395 } 4396 #endif 4397 4398 #ifdef ENABLE_LE_CENTRAL 4399 if (connecting_stop){ 4400 hci_send_cmd(&hci_le_create_connection_cancel); 4401 return true; 4402 } 4403 #endif 4404 4405 #ifdef ENABLE_LE_PERIPHERAL 4406 if (advertising_stop){ 4407 hci_stack->le_advertisements_active = false; 4408 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4409 return true; 4410 } 4411 #endif 4412 4413 // Phase 3: modify 4414 4415 #ifdef ENABLE_LE_CENTRAL 4416 if (hci_stack->le_scanning_param_update){ 4417 hci_stack->le_scanning_param_update = false; 4418 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4419 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4420 return true; 4421 } 4422 #endif 4423 4424 #ifdef ENABLE_LE_PERIPHERAL 4425 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4426 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4427 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4428 hci_send_cmd(&hci_le_set_advertising_parameters, 4429 hci_stack->le_advertisements_interval_min, 4430 hci_stack->le_advertisements_interval_max, 4431 hci_stack->le_advertisements_type, 4432 hci_stack->le_advertisements_own_addr_type, 4433 hci_stack->le_advertisements_direct_address_type, 4434 hci_stack->le_advertisements_direct_address, 4435 hci_stack->le_advertisements_channel_map, 4436 hci_stack->le_advertisements_filter_policy); 4437 return true; 4438 } 4439 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4440 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4441 uint8_t adv_data_clean[31]; 4442 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4443 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4444 hci_stack->le_advertisements_data_len); 4445 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4446 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4447 return true; 4448 } 4449 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4450 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4451 uint8_t scan_data_clean[31]; 4452 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4453 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4454 hci_stack->le_scan_response_data_len); 4455 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4456 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4457 return true; 4458 } 4459 #endif 4460 4461 4462 #ifdef ENABLE_LE_CENTRAL 4463 // if connect with whitelist was active and is not cancelled yet, wait until next time 4464 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4465 #endif 4466 4467 // LE Whitelist Management 4468 if (whitelist_modification_pending){ 4469 // add/remove entries 4470 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4471 while (btstack_linked_list_iterator_has_next(&lit)){ 4472 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4473 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4474 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4475 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4476 return true; 4477 } 4478 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4479 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4480 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4481 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4482 return true; 4483 } 4484 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4485 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4486 btstack_memory_whitelist_entry_free(entry); 4487 } 4488 } 4489 } 4490 4491 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4492 // LE Resolving List Management 4493 if (resolving_list_supported) { 4494 uint16_t i; 4495 switch (hci_stack->le_resolving_list_state) { 4496 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4497 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4498 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4499 return true; 4500 case LE_RESOLVING_LIST_READ_SIZE: 4501 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4502 hci_send_cmd(&hci_le_read_resolving_list_size); 4503 return true; 4504 case LE_RESOLVING_LIST_SEND_CLEAR: 4505 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4506 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4507 sizeof(hci_stack->le_resolving_list_add_entries)); 4508 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4509 sizeof(hci_stack->le_resolving_list_remove_entries)); 4510 hci_send_cmd(&hci_le_clear_resolving_list); 4511 return true; 4512 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4513 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4514 uint8_t offset = i >> 3; 4515 uint8_t mask = 1 << (i & 7); 4516 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4517 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4518 bd_addr_t peer_identity_addreses; 4519 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4520 sm_key_t peer_irk; 4521 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4522 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4523 4524 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4525 // trigger whitelist entry 'update' (work around for controller bug) 4526 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4527 while (btstack_linked_list_iterator_has_next(&lit)) { 4528 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4529 if (entry->address_type != peer_identity_addr_type) continue; 4530 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4531 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4532 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4533 } 4534 #endif 4535 4536 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4537 peer_identity_addreses); 4538 return true; 4539 } 4540 4541 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4542 4543 /* fall through */ 4544 4545 case LE_RESOLVING_LIST_ADD_ENTRIES: 4546 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4547 uint8_t offset = i >> 3; 4548 uint8_t mask = 1 << (i & 7); 4549 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4550 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4551 bd_addr_t peer_identity_addreses; 4552 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4553 sm_key_t peer_irk; 4554 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4555 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4556 const uint8_t *local_irk = gap_get_persistent_irk(); 4557 // command uses format specifier 'P' that stores 16-byte value without flip 4558 uint8_t local_irk_flipped[16]; 4559 uint8_t peer_irk_flipped[16]; 4560 reverse_128(local_irk, local_irk_flipped); 4561 reverse_128(peer_irk, peer_irk_flipped); 4562 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4563 peer_irk_flipped, local_irk_flipped); 4564 return true; 4565 } 4566 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4567 break; 4568 4569 default: 4570 break; 4571 } 4572 } 4573 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4574 #endif 4575 4576 // Phase 4: restore state 4577 4578 #ifdef ENABLE_LE_CENTRAL 4579 // re-start scanning 4580 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4581 hci_stack->le_scanning_active = true; 4582 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4583 return true; 4584 } 4585 #endif 4586 4587 #ifdef ENABLE_LE_CENTRAL 4588 // re-start connecting 4589 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4590 bd_addr_t null_addr; 4591 memset(null_addr, 0, 6); 4592 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4593 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4594 hci_send_cmd(&hci_le_create_connection, 4595 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4596 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4597 1, // use whitelist 4598 0, // peer address type 4599 null_addr, // peer bd addr 4600 hci_stack->le_connection_own_addr_type, // our addr type: 4601 hci_stack->le_connection_interval_min, // conn interval min 4602 hci_stack->le_connection_interval_max, // conn interval max 4603 hci_stack->le_connection_latency, // conn latency 4604 hci_stack->le_supervision_timeout, // conn latency 4605 hci_stack->le_minimum_ce_length, // min ce length 4606 hci_stack->le_maximum_ce_length // max ce length 4607 ); 4608 return true; 4609 } 4610 #endif 4611 4612 #ifdef ENABLE_LE_PERIPHERAL 4613 // re-start advertising 4614 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4615 // check if advertisements should be enabled given 4616 hci_stack->le_advertisements_active = true; 4617 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4618 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4619 return true; 4620 } 4621 #endif 4622 4623 return false; 4624 } 4625 #endif 4626 4627 static bool hci_run_general_pending_commands(void){ 4628 btstack_linked_item_t * it; 4629 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4630 hci_connection_t * connection = (hci_connection_t *) it; 4631 4632 switch(connection->state){ 4633 case SEND_CREATE_CONNECTION: 4634 switch(connection->address_type){ 4635 #ifdef ENABLE_CLASSIC 4636 case BD_ADDR_TYPE_ACL: 4637 log_info("sending hci_create_connection"); 4638 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4639 break; 4640 #endif 4641 default: 4642 #ifdef ENABLE_BLE 4643 #ifdef ENABLE_LE_CENTRAL 4644 log_info("sending hci_le_create_connection"); 4645 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4646 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4647 hci_send_cmd(&hci_le_create_connection, 4648 hci_stack->le_connection_scan_interval, // conn scan interval 4649 hci_stack->le_connection_scan_window, // conn scan windows 4650 0, // don't use whitelist 4651 connection->address_type, // peer address type 4652 connection->address, // peer bd addr 4653 hci_stack->le_connection_own_addr_type, // our addr type: 4654 hci_stack->le_connection_interval_min, // conn interval min 4655 hci_stack->le_connection_interval_max, // conn interval max 4656 hci_stack->le_connection_latency, // conn latency 4657 hci_stack->le_supervision_timeout, // conn latency 4658 hci_stack->le_minimum_ce_length, // min ce length 4659 hci_stack->le_maximum_ce_length // max ce length 4660 ); 4661 connection->state = SENT_CREATE_CONNECTION; 4662 #endif 4663 #endif 4664 break; 4665 } 4666 return true; 4667 4668 #ifdef ENABLE_CLASSIC 4669 case RECEIVED_CONNECTION_REQUEST: 4670 connection->role = HCI_ROLE_SLAVE; 4671 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4672 log_info("sending hci_accept_connection_request"); 4673 connection->state = ACCEPTED_CONNECTION_REQUEST; 4674 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4675 } 4676 return true; 4677 #endif 4678 4679 #ifdef ENABLE_BLE 4680 #ifdef ENABLE_LE_CENTRAL 4681 case SEND_CANCEL_CONNECTION: 4682 connection->state = SENT_CANCEL_CONNECTION; 4683 hci_send_cmd(&hci_le_create_connection_cancel); 4684 return true; 4685 #endif 4686 #endif 4687 case SEND_DISCONNECT: 4688 connection->state = SENT_DISCONNECT; 4689 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4690 return true; 4691 4692 default: 4693 break; 4694 } 4695 4696 // no further commands if connection is about to get shut down 4697 if (connection->state == SENT_DISCONNECT) continue; 4698 4699 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4700 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4701 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4702 return true; 4703 } 4704 4705 #ifdef ENABLE_CLASSIC 4706 4707 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4708 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4709 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4710 return true; 4711 } 4712 4713 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4714 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4715 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4716 return true; 4717 } 4718 4719 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4720 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4721 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4722 return true; 4723 } 4724 4725 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4726 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4727 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4728 return true; 4729 } 4730 4731 // Handling link key request requires remote supported features 4732 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4733 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4734 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4735 4736 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4737 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4738 if (have_link_key && security_level_sufficient){ 4739 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4740 } else { 4741 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4742 } 4743 return true; 4744 } 4745 4746 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4747 log_info("denying to pin request"); 4748 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4749 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4750 return true; 4751 } 4752 4753 // security assessment requires remote features 4754 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4755 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4756 hci_ssp_assess_security_on_io_cap_request(connection); 4757 // 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 4758 } 4759 4760 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4761 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4762 // set authentication requirements: 4763 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4764 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4765 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4766 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4767 authreq |= 1; 4768 } 4769 bool bonding = hci_stack->bondable; 4770 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4771 // if we have received IO Cap Response, we're in responder role 4772 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4773 if (bonding && !remote_bonding){ 4774 log_info("Remote not bonding, dropping local flag"); 4775 bonding = false; 4776 } 4777 } 4778 if (bonding){ 4779 if (connection->bonding_flags & BONDING_DEDICATED){ 4780 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4781 } else { 4782 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4783 } 4784 } 4785 uint8_t have_oob_data = 0; 4786 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4787 if (connection->classic_oob_c_192 != NULL){ 4788 have_oob_data |= 1; 4789 } 4790 if (connection->classic_oob_c_256 != NULL){ 4791 have_oob_data |= 2; 4792 } 4793 #endif 4794 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4795 return true; 4796 } 4797 4798 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4799 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4800 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4801 return true; 4802 } 4803 4804 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4805 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4806 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4807 const uint8_t zero[16] = { 0 }; 4808 const uint8_t * r_192 = zero; 4809 const uint8_t * c_192 = zero; 4810 const uint8_t * r_256 = zero; 4811 const uint8_t * c_256 = zero; 4812 // verify P-256 OOB 4813 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4814 c_256 = connection->classic_oob_c_256; 4815 if (connection->classic_oob_r_256 != NULL) { 4816 r_256 = connection->classic_oob_r_256; 4817 } 4818 } 4819 // verify P-192 OOB 4820 if ((connection->classic_oob_c_192 != NULL)) { 4821 c_192 = connection->classic_oob_c_192; 4822 if (connection->classic_oob_r_192 != NULL) { 4823 r_192 = connection->classic_oob_r_192; 4824 } 4825 } 4826 4827 // assess security 4828 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4829 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4830 if (need_level_4 && !can_reach_level_4){ 4831 log_info("Level 4 required, but not possible -> abort"); 4832 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4833 // send oob negative reply 4834 c_256 = NULL; 4835 c_192 = NULL; 4836 } 4837 4838 // Reply 4839 if (c_256 != zero) { 4840 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4841 } else if (c_192 != zero){ 4842 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4843 } else { 4844 hci_stack->classic_oob_con_handle = connection->con_handle; 4845 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4846 } 4847 return true; 4848 } 4849 #endif 4850 4851 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4852 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4853 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4854 return true; 4855 } 4856 4857 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4858 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4859 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4860 return true; 4861 } 4862 4863 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4864 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4865 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4866 return true; 4867 } 4868 4869 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4870 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4871 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4872 connection->state = SENT_DISCONNECT; 4873 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4874 return true; 4875 } 4876 4877 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4878 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4879 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4880 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4881 return true; 4882 } 4883 4884 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4885 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4886 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4887 return true; 4888 } 4889 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4890 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4891 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4892 return true; 4893 } 4894 #endif 4895 4896 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4897 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4898 #ifdef ENABLE_CLASSIC 4899 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4900 #endif 4901 if (connection->state != SENT_DISCONNECT){ 4902 connection->state = SENT_DISCONNECT; 4903 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4904 return true; 4905 } 4906 } 4907 4908 #ifdef ENABLE_CLASSIC 4909 uint16_t sniff_min_interval; 4910 switch (connection->sniff_min_interval){ 4911 case 0: 4912 break; 4913 case 0xffff: 4914 connection->sniff_min_interval = 0; 4915 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4916 return true; 4917 default: 4918 sniff_min_interval = connection->sniff_min_interval; 4919 connection->sniff_min_interval = 0; 4920 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4921 return true; 4922 } 4923 4924 if (connection->sniff_subrating_max_latency != 0xffff){ 4925 uint16_t max_latency = connection->sniff_subrating_max_latency; 4926 connection->sniff_subrating_max_latency = 0; 4927 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4928 return true; 4929 } 4930 4931 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4932 uint8_t service_type = (uint8_t) connection->qos_service_type; 4933 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4934 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); 4935 return true; 4936 } 4937 4938 if (connection->request_role != HCI_ROLE_INVALID){ 4939 hci_role_t role = connection->request_role; 4940 connection->request_role = HCI_ROLE_INVALID; 4941 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4942 return true; 4943 } 4944 #endif 4945 4946 #ifdef ENABLE_BLE 4947 switch (connection->le_con_parameter_update_state){ 4948 // response to L2CAP CON PARAMETER UPDATE REQUEST 4949 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4950 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4951 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4952 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4953 0x0000, 0xffff); 4954 return true; 4955 case CON_PARAMETER_UPDATE_REPLY: 4956 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4957 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4958 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4959 0x0000, 0xffff); 4960 return true; 4961 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4962 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4963 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4964 return true; 4965 default: 4966 break; 4967 } 4968 if (connection->le_phy_update_all_phys != 0xffu){ 4969 uint8_t all_phys = connection->le_phy_update_all_phys; 4970 connection->le_phy_update_all_phys = 0xff; 4971 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); 4972 return true; 4973 } 4974 #endif 4975 } 4976 return false; 4977 } 4978 4979 static void hci_run(void){ 4980 4981 bool done; 4982 4983 // send continuation fragments first, as they block the prepared packet buffer 4984 done = hci_run_acl_fragments(); 4985 if (done) return; 4986 4987 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4988 // send host num completed packets next as they don't require num_cmd_packets > 0 4989 if (!hci_can_send_comand_packet_transport()) return; 4990 if (hci_stack->host_completed_packets){ 4991 hci_host_num_completed_packets(); 4992 return; 4993 } 4994 #endif 4995 4996 if (!hci_can_send_command_packet_now()) return; 4997 4998 // global/non-connection oriented commands 4999 5000 5001 #ifdef ENABLE_CLASSIC 5002 // general gap classic 5003 done = hci_run_general_gap_classic(); 5004 if (done) return; 5005 #endif 5006 5007 #ifdef ENABLE_BLE 5008 // general gap le 5009 done = hci_run_general_gap_le(); 5010 if (done) return; 5011 #endif 5012 5013 // send pending HCI commands 5014 done = hci_run_general_pending_commands(); 5015 if (done) return; 5016 5017 // stack state sub statemachines 5018 hci_connection_t * connection; 5019 switch (hci_stack->state){ 5020 case HCI_STATE_INITIALIZING: 5021 hci_initializing_run(); 5022 break; 5023 5024 case HCI_STATE_HALTING: 5025 5026 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5027 switch (hci_stack->substate){ 5028 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5029 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5030 5031 #ifdef ENABLE_BLE 5032 #ifdef ENABLE_LE_CENTRAL 5033 // free whitelist entries 5034 { 5035 btstack_linked_list_iterator_t lit; 5036 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5037 while (btstack_linked_list_iterator_has_next(&lit)){ 5038 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5039 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5040 btstack_memory_whitelist_entry_free(entry); 5041 } 5042 } 5043 #endif 5044 #endif 5045 // close all open connections 5046 connection = (hci_connection_t *) hci_stack->connections; 5047 if (connection){ 5048 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5049 if (!hci_can_send_command_packet_now()) return; 5050 5051 // check state 5052 if (connection->state == SENT_DISCONNECT) return; 5053 connection->state = SENT_DISCONNECT; 5054 5055 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5056 5057 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5058 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5059 5060 // ... which would be ignored anyway as we shutdown (free) the connection now 5061 hci_shutdown_connection(connection); 5062 5063 // finally, send the disconnect command 5064 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5065 return; 5066 } 5067 5068 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5069 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5070 log_info("HCI_STATE_HALTING: wait 50 ms"); 5071 hci_stack->substate = HCI_HALTING_W4_TIMER; 5072 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5073 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5074 btstack_run_loop_add_timer(&hci_stack->timeout); 5075 break; 5076 } 5077 5078 /* fall through */ 5079 5080 case HCI_HALTING_CLOSE: 5081 log_info("HCI_STATE_HALTING, calling off"); 5082 5083 // switch mode 5084 hci_power_control_off(); 5085 5086 log_info("HCI_STATE_HALTING, emitting state"); 5087 hci_emit_state(); 5088 log_info("HCI_STATE_HALTING, done"); 5089 break; 5090 5091 case HCI_HALTING_W4_TIMER: 5092 // keep waiting 5093 5094 break; 5095 default: 5096 break; 5097 } 5098 5099 break; 5100 5101 case HCI_STATE_FALLING_ASLEEP: 5102 switch(hci_stack->substate) { 5103 case HCI_FALLING_ASLEEP_DISCONNECT: 5104 log_info("HCI_STATE_FALLING_ASLEEP"); 5105 // close all open connections 5106 connection = (hci_connection_t *) hci_stack->connections; 5107 5108 #ifdef HAVE_PLATFORM_IPHONE_OS 5109 // don't close connections, if H4 supports power management 5110 if (btstack_control_iphone_power_management_enabled()){ 5111 connection = NULL; 5112 } 5113 #endif 5114 if (connection){ 5115 5116 // send disconnect 5117 if (!hci_can_send_command_packet_now()) return; 5118 5119 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5120 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5121 5122 // send disconnected event right away - causes higher layer connections to get closed, too. 5123 hci_shutdown_connection(connection); 5124 return; 5125 } 5126 5127 if (hci_classic_supported()){ 5128 // disable page and inquiry scan 5129 if (!hci_can_send_command_packet_now()) return; 5130 5131 log_info("HCI_STATE_HALTING, disabling inq scans"); 5132 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5133 5134 // continue in next sub state 5135 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5136 break; 5137 } 5138 5139 /* fall through */ 5140 5141 case HCI_FALLING_ASLEEP_COMPLETE: 5142 log_info("HCI_STATE_HALTING, calling sleep"); 5143 #ifdef HAVE_PLATFORM_IPHONE_OS 5144 // don't actually go to sleep, if H4 supports power management 5145 if (btstack_control_iphone_power_management_enabled()){ 5146 // SLEEP MODE reached 5147 hci_stack->state = HCI_STATE_SLEEPING; 5148 hci_emit_state(); 5149 break; 5150 } 5151 #endif 5152 // switch mode 5153 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5154 hci_emit_state(); 5155 break; 5156 5157 default: 5158 break; 5159 } 5160 break; 5161 5162 default: 5163 break; 5164 } 5165 } 5166 5167 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5168 // house-keeping 5169 5170 #ifdef ENABLE_CLASSIC 5171 bd_addr_t addr; 5172 hci_connection_t * conn; 5173 #endif 5174 #ifdef ENABLE_LE_CENTRAL 5175 uint8_t initiator_filter_policy; 5176 #endif 5177 5178 uint16_t opcode = little_endian_read_16(packet, 0); 5179 switch (opcode) { 5180 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5181 hci_stack->loopback_mode = packet[3]; 5182 break; 5183 5184 #ifdef ENABLE_CLASSIC 5185 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5186 reverse_bd_addr(&packet[3], addr); 5187 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5188 5189 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5190 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5191 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5192 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5193 } 5194 5195 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5196 if (!conn) { 5197 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5198 if (!conn) { 5199 // notify client that alloc failed 5200 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5201 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5202 } 5203 conn->state = SEND_CREATE_CONNECTION; 5204 conn->role = HCI_ROLE_MASTER; 5205 } 5206 5207 conn->con_handle = HCI_CON_HANDLE_INVALID; 5208 conn->role = HCI_ROLE_INVALID; 5209 5210 log_info("conn state %u", conn->state); 5211 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5212 switch (conn->state) { 5213 // if connection active exists 5214 case OPEN: 5215 // and OPEN, emit connection complete command 5216 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5217 // packet not sent to controller 5218 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5219 case RECEIVED_DISCONNECTION_COMPLETE: 5220 // create connection triggered in disconnect complete event, let's do it now 5221 break; 5222 case SEND_CREATE_CONNECTION: 5223 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5224 break; 5225 default: 5226 // otherwise, just ignore as it is already in the open process 5227 // packet not sent to controller 5228 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5229 } 5230 conn->state = SENT_CREATE_CONNECTION; 5231 5232 // track outgoing connection 5233 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5234 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5235 break; 5236 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5237 if (hci_stack->link_key_db) { 5238 reverse_bd_addr(&packet[3], addr); 5239 hci_stack->link_key_db->delete_link_key(addr); 5240 } 5241 break; 5242 5243 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5244 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5245 // setup_synchronous_connection? Voice setting at offset 22 5246 // TODO: compare to current setting if sco connection already active 5247 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5248 break; 5249 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5250 // accept_synchronus_connection? Voice setting at offset 18 5251 // TODO: compare to current setting if sco connection already active 5252 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5253 break; 5254 #endif 5255 #endif 5256 5257 #ifdef ENABLE_BLE 5258 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5259 hci_stack->le_random_address_set = 1; 5260 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5261 break; 5262 #ifdef ENABLE_LE_PERIPHERAL 5263 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5264 hci_stack->le_advertisements_active = packet[3] != 0; 5265 break; 5266 #endif 5267 #ifdef ENABLE_LE_CENTRAL 5268 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5269 // white list used? 5270 initiator_filter_policy = packet[7]; 5271 switch (initiator_filter_policy) { 5272 case 0: 5273 // whitelist not used 5274 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5275 break; 5276 case 1: 5277 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5278 break; 5279 default: 5280 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5281 break; 5282 } 5283 // track outgoing connection 5284 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5285 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5286 break; 5287 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5288 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5289 break; 5290 #endif 5291 #endif 5292 default: 5293 break; 5294 } 5295 5296 hci_stack->num_cmd_packets--; 5297 5298 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5299 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5300 if (err != 0){ 5301 return ERROR_CODE_HARDWARE_FAILURE; 5302 } 5303 return ERROR_CODE_SUCCESS; 5304 } 5305 5306 // disconnect because of security block 5307 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5308 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5309 if (!connection) return; 5310 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5311 } 5312 5313 5314 // Configure Secure Simple Pairing 5315 5316 #ifdef ENABLE_CLASSIC 5317 5318 // enable will enable SSP during init 5319 void gap_ssp_set_enable(int enable){ 5320 hci_stack->ssp_enable = enable; 5321 } 5322 5323 static int hci_local_ssp_activated(void){ 5324 return gap_ssp_supported() && hci_stack->ssp_enable; 5325 } 5326 5327 // if set, BTstack will respond to io capability request using authentication requirement 5328 void gap_ssp_set_io_capability(int io_capability){ 5329 hci_stack->ssp_io_capability = io_capability; 5330 } 5331 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5332 hci_stack->ssp_authentication_requirement = authentication_requirement; 5333 } 5334 5335 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5336 void gap_ssp_set_auto_accept(int auto_accept){ 5337 hci_stack->ssp_auto_accept = auto_accept; 5338 } 5339 5340 void gap_secure_connections_enable(bool enable){ 5341 hci_stack->secure_connections_enable = enable; 5342 } 5343 5344 #endif 5345 5346 // va_list part of hci_send_cmd 5347 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5348 if (!hci_can_send_command_packet_now()){ 5349 log_error("hci_send_cmd called but cannot send packet now"); 5350 return ERROR_CODE_COMMAND_DISALLOWED; 5351 } 5352 5353 // for HCI INITIALIZATION 5354 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5355 hci_stack->last_cmd_opcode = cmd->opcode; 5356 5357 hci_reserve_packet_buffer(); 5358 uint8_t * packet = hci_stack->hci_packet_buffer; 5359 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5360 uint8_t status = hci_send_cmd_packet(packet, size); 5361 5362 // release packet buffer on error or for synchronous transport implementations 5363 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5364 hci_release_packet_buffer(); 5365 hci_emit_transport_packet_sent(); 5366 } 5367 5368 return status; 5369 } 5370 5371 /** 5372 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5373 */ 5374 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5375 va_list argptr; 5376 va_start(argptr, cmd); 5377 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5378 va_end(argptr); 5379 return status; 5380 } 5381 5382 // Create various non-HCI events. 5383 // TODO: generalize, use table similar to hci_create_command 5384 5385 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5386 // dump packet 5387 if (dump) { 5388 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5389 } 5390 5391 // dispatch to all event handlers 5392 btstack_linked_list_iterator_t it; 5393 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5394 while (btstack_linked_list_iterator_has_next(&it)){ 5395 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5396 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5397 } 5398 } 5399 5400 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5401 if (!hci_stack->acl_packet_handler) return; 5402 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5403 } 5404 5405 #ifdef ENABLE_CLASSIC 5406 static void hci_notify_if_sco_can_send_now(void){ 5407 // notify SCO sender if waiting 5408 if (!hci_stack->sco_waiting_for_can_send_now) return; 5409 if (hci_can_send_sco_packet_now()){ 5410 hci_stack->sco_waiting_for_can_send_now = 0; 5411 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5412 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5413 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5414 } 5415 } 5416 5417 // parsing end emitting has been merged to reduce code size 5418 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5419 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5420 5421 uint8_t * eir_data; 5422 ad_context_t context; 5423 const uint8_t * name; 5424 uint8_t name_len; 5425 5426 if (size < 3) return; 5427 5428 int event_type = hci_event_packet_get_type(packet); 5429 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5430 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5431 5432 switch (event_type){ 5433 case HCI_EVENT_INQUIRY_RESULT: 5434 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5435 if (size != (3 + (num_responses * 14))) return; 5436 break; 5437 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5438 if (size != 257) return; 5439 if (num_responses != 1) return; 5440 break; 5441 default: 5442 return; 5443 } 5444 5445 // event[1] is set at the end 5446 int i; 5447 for (i=0; i<num_responses;i++){ 5448 memset(event, 0, sizeof(event)); 5449 event[0] = GAP_EVENT_INQUIRY_RESULT; 5450 uint8_t event_size = 27; // if name is not set by EIR 5451 5452 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5453 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5454 (void)memcpy(&event[9], 5455 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5456 3); // class of device 5457 (void)memcpy(&event[12], 5458 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5459 2); // clock offset 5460 5461 switch (event_type){ 5462 case HCI_EVENT_INQUIRY_RESULT: 5463 // 14,15,16,17 = 0, size 18 5464 break; 5465 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5466 event[14] = 1; 5467 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5468 // 16,17 = 0, size 18 5469 break; 5470 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5471 event[14] = 1; 5472 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5473 // EIR packets only contain a single inquiry response 5474 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5475 name = NULL; 5476 // Iterate over EIR data 5477 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5478 uint8_t data_type = ad_iterator_get_data_type(&context); 5479 uint8_t data_size = ad_iterator_get_data_len(&context); 5480 const uint8_t * data = ad_iterator_get_data(&context); 5481 // Prefer Complete Local Name over Shortened Local Name 5482 switch (data_type){ 5483 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5484 if (name) continue; 5485 /* fall through */ 5486 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5487 name = data; 5488 name_len = data_size; 5489 break; 5490 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5491 if (data_size != 8) break; 5492 event[16] = 1; 5493 memcpy(&event[17], data, 8); 5494 break; 5495 default: 5496 break; 5497 } 5498 } 5499 if (name){ 5500 event[25] = 1; 5501 // truncate name if needed 5502 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5503 event[26] = len; 5504 (void)memcpy(&event[27], name, len); 5505 event_size += len; 5506 } 5507 break; 5508 default: 5509 return; 5510 } 5511 event[1] = event_size - 2; 5512 hci_emit_event(event, event_size, 1); 5513 } 5514 } 5515 #endif 5516 5517 void hci_emit_state(void){ 5518 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5519 uint8_t event[3]; 5520 event[0] = BTSTACK_EVENT_STATE; 5521 event[1] = sizeof(event) - 2u; 5522 event[2] = hci_stack->state; 5523 hci_emit_event(event, sizeof(event), 1); 5524 } 5525 5526 #ifdef ENABLE_CLASSIC 5527 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5528 uint8_t event[13]; 5529 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5530 event[1] = sizeof(event) - 2; 5531 event[2] = status; 5532 little_endian_store_16(event, 3, con_handle); 5533 reverse_bd_addr(address, &event[5]); 5534 event[11] = 1; // ACL connection 5535 event[12] = 0; // encryption disabled 5536 hci_emit_event(event, sizeof(event), 1); 5537 } 5538 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5539 if (disable_l2cap_timeouts) return; 5540 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5541 uint8_t event[4]; 5542 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5543 event[1] = sizeof(event) - 2; 5544 little_endian_store_16(event, 2, conn->con_handle); 5545 hci_emit_event(event, sizeof(event), 1); 5546 } 5547 #endif 5548 5549 #ifdef ENABLE_BLE 5550 #ifdef ENABLE_LE_CENTRAL 5551 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){ 5552 uint8_t event[21]; 5553 event[0] = HCI_EVENT_LE_META; 5554 event[1] = sizeof(event) - 2u; 5555 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5556 event[3] = status; 5557 little_endian_store_16(event, 4, con_handle); 5558 event[6] = 0; // TODO: role 5559 event[7] = address_type; 5560 reverse_bd_addr(address, &event[8]); 5561 little_endian_store_16(event, 14, 0); // interval 5562 little_endian_store_16(event, 16, 0); // latency 5563 little_endian_store_16(event, 18, 0); // supervision timeout 5564 event[20] = 0; // master clock accuracy 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 #endif 5568 #endif 5569 5570 static void hci_emit_transport_packet_sent(void){ 5571 // notify upper stack that it might be possible to send again 5572 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5573 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5574 } 5575 5576 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5577 uint8_t event[6]; 5578 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5579 event[1] = sizeof(event) - 2u; 5580 event[2] = 0; // status = OK 5581 little_endian_store_16(event, 3, con_handle); 5582 event[5] = reason; 5583 hci_emit_event(event, sizeof(event), 1); 5584 } 5585 5586 static void hci_emit_nr_connections_changed(void){ 5587 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5588 uint8_t event[3]; 5589 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5590 event[1] = sizeof(event) - 2u; 5591 event[2] = nr_hci_connections(); 5592 hci_emit_event(event, sizeof(event), 1); 5593 } 5594 5595 static void hci_emit_hci_open_failed(void){ 5596 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5597 uint8_t event[2]; 5598 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5599 event[1] = sizeof(event) - 2u; 5600 hci_emit_event(event, sizeof(event), 1); 5601 } 5602 5603 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5604 log_info("hci_emit_dedicated_bonding_result %u ", status); 5605 uint8_t event[9]; 5606 int pos = 0; 5607 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5608 event[pos++] = sizeof(event) - 2u; 5609 event[pos++] = status; 5610 reverse_bd_addr(address, &event[pos]); 5611 hci_emit_event(event, sizeof(event), 1); 5612 } 5613 5614 5615 #ifdef ENABLE_CLASSIC 5616 5617 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5618 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5619 uint8_t event[5]; 5620 int pos = 0; 5621 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5622 event[pos++] = sizeof(event) - 2; 5623 little_endian_store_16(event, 2, con_handle); 5624 pos += 2; 5625 event[pos++] = level; 5626 hci_emit_event(event, sizeof(event), 1); 5627 } 5628 5629 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5630 if (!connection) return LEVEL_0; 5631 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5632 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5633 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5634 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5635 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5636 // LEVEL 4 always requires 128 bit encrytion key size 5637 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5638 security_level = LEVEL_3; 5639 } 5640 return security_level; 5641 } 5642 5643 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5644 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5645 uint8_t event[3]; 5646 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5647 event[1] = sizeof(event) - 2; 5648 event[2] = enabled; 5649 hci_emit_event(event, sizeof(event), 1); 5650 } 5651 5652 // query if remote side supports eSCO 5653 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5654 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5655 if (!connection) return false; 5656 return (connection->remote_supported_features[0] & 1) != 0; 5657 } 5658 5659 static bool hci_ssp_supported(hci_connection_t * connection){ 5660 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5661 return (connection->bonding_flags & mask) == mask; 5662 } 5663 5664 // query if remote side supports SSP 5665 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5666 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5667 if (!connection) return false; 5668 return hci_ssp_supported(connection) ? 1 : 0; 5669 } 5670 5671 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5672 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5673 } 5674 5675 // GAP API 5676 /** 5677 * @bbrief enable/disable bonding. default is enabled 5678 * @praram enabled 5679 */ 5680 void gap_set_bondable_mode(int enable){ 5681 hci_stack->bondable = enable ? 1 : 0; 5682 } 5683 /** 5684 * @brief Get bondable mode. 5685 * @return 1 if bondable 5686 */ 5687 int gap_get_bondable_mode(void){ 5688 return hci_stack->bondable; 5689 } 5690 5691 /** 5692 * @brief map link keys to security levels 5693 */ 5694 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5695 switch (link_key_type){ 5696 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5697 return LEVEL_4; 5698 case COMBINATION_KEY: 5699 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5700 return LEVEL_3; 5701 default: 5702 return LEVEL_2; 5703 } 5704 } 5705 5706 /** 5707 * @brief map link keys to secure connection yes/no 5708 */ 5709 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5710 switch (link_key_type){ 5711 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5712 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5713 return 1; 5714 default: 5715 return 0; 5716 } 5717 } 5718 5719 /** 5720 * @brief map link keys to authenticated 5721 */ 5722 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5723 switch (link_key_type){ 5724 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5725 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5726 return 1; 5727 default: 5728 return 0; 5729 } 5730 } 5731 5732 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5733 log_info("gap_mitm_protection_required_for_security_level %u", level); 5734 return level > LEVEL_2; 5735 } 5736 5737 /** 5738 * @brief get current security level 5739 */ 5740 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5741 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5742 if (!connection) return LEVEL_0; 5743 return gap_security_level_for_connection(connection); 5744 } 5745 5746 /** 5747 * @brief request connection to device to 5748 * @result GAP_AUTHENTICATION_RESULT 5749 */ 5750 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5751 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5752 if (!connection){ 5753 hci_emit_security_level(con_handle, LEVEL_0); 5754 return; 5755 } 5756 5757 btstack_assert(hci_is_le_connection(connection) == false); 5758 5759 // 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) 5760 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5761 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5762 requested_level = LEVEL_4; 5763 } 5764 5765 gap_security_level_t current_level = gap_security_level(con_handle); 5766 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5767 requested_level, connection->requested_security_level, current_level); 5768 5769 // authentication active if authentication request was sent or planned level > 0 5770 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5771 if (authentication_active){ 5772 // authentication already active 5773 if (connection->requested_security_level < requested_level){ 5774 // increase requested level as new level is higher 5775 // TODO: handle re-authentication when done 5776 connection->requested_security_level = requested_level; 5777 } 5778 } else { 5779 // no request active, notify if security sufficient 5780 if (requested_level <= current_level){ 5781 hci_emit_security_level(con_handle, current_level); 5782 return; 5783 } 5784 5785 // store request 5786 connection->requested_security_level = requested_level; 5787 5788 // start to authenticate connection 5789 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5790 hci_run(); 5791 } 5792 } 5793 5794 /** 5795 * @brief start dedicated bonding with device. disconnect after bonding 5796 * @param device 5797 * @param request MITM protection 5798 * @result GAP_DEDICATED_BONDING_COMPLETE 5799 */ 5800 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5801 5802 // create connection state machine 5803 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5804 5805 if (!connection){ 5806 return BTSTACK_MEMORY_ALLOC_FAILED; 5807 } 5808 5809 // delete linkn key 5810 gap_drop_link_key_for_bd_addr(device); 5811 5812 // configure LEVEL_2/3, dedicated bonding 5813 connection->state = SEND_CREATE_CONNECTION; 5814 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5815 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5816 connection->bonding_flags = BONDING_DEDICATED; 5817 5818 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5819 5820 // handle: connnection failure (connection complete != ok) 5821 // handle: authentication failure 5822 // handle: disconnect on done 5823 5824 hci_run(); 5825 5826 return 0; 5827 } 5828 5829 void gap_set_local_name(const char * local_name){ 5830 hci_stack->local_name = local_name; 5831 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5832 // also update EIR if not set by user 5833 if (hci_stack->eir_data == NULL){ 5834 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5835 } 5836 hci_run(); 5837 } 5838 #endif 5839 5840 5841 #ifdef ENABLE_BLE 5842 5843 #ifdef ENABLE_LE_CENTRAL 5844 void gap_start_scan(void){ 5845 hci_stack->le_scanning_enabled = true; 5846 hci_run(); 5847 } 5848 5849 void gap_stop_scan(void){ 5850 hci_stack->le_scanning_enabled = false; 5851 hci_run(); 5852 } 5853 5854 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5855 hci_stack->le_scan_type = scan_type; 5856 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5857 hci_stack->le_scan_interval = scan_interval; 5858 hci_stack->le_scan_window = scan_window; 5859 hci_stack->le_scanning_param_update = true; 5860 hci_run(); 5861 } 5862 5863 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5864 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5865 } 5866 5867 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5868 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5869 if (!conn){ 5870 // disallow if le connection is already outgoing 5871 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5872 log_error("le connection already active"); 5873 return ERROR_CODE_COMMAND_DISALLOWED; 5874 } 5875 5876 log_info("gap_connect: no connection exists yet, creating context"); 5877 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5878 if (!conn){ 5879 // notify client that alloc failed 5880 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5881 log_info("gap_connect: failed to alloc hci_connection_t"); 5882 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5883 } 5884 5885 // set le connecting state 5886 if (hci_is_le_connection_type(addr_type)){ 5887 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5888 } 5889 5890 conn->state = SEND_CREATE_CONNECTION; 5891 log_info("gap_connect: send create connection next"); 5892 hci_run(); 5893 return ERROR_CODE_SUCCESS; 5894 } 5895 5896 if (!hci_is_le_connection(conn) || 5897 (conn->state == SEND_CREATE_CONNECTION) || 5898 (conn->state == SENT_CREATE_CONNECTION)) { 5899 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5900 log_error("gap_connect: classic connection or connect is already being created"); 5901 return GATT_CLIENT_IN_WRONG_STATE; 5902 } 5903 5904 // check if connection was just disconnected 5905 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5906 log_info("gap_connect: send create connection (again)"); 5907 conn->state = SEND_CREATE_CONNECTION; 5908 hci_run(); 5909 return ERROR_CODE_SUCCESS; 5910 } 5911 5912 log_info("gap_connect: context exists with state %u", conn->state); 5913 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5914 hci_run(); 5915 return ERROR_CODE_SUCCESS; 5916 } 5917 5918 // @assumption: only a single outgoing LE Connection exists 5919 static hci_connection_t * gap_get_outgoing_connection(void){ 5920 btstack_linked_item_t *it; 5921 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5922 hci_connection_t * conn = (hci_connection_t *) it; 5923 if (!hci_is_le_connection(conn)) continue; 5924 switch (conn->state){ 5925 case SEND_CREATE_CONNECTION: 5926 case SENT_CREATE_CONNECTION: 5927 case SENT_CANCEL_CONNECTION: 5928 return conn; 5929 default: 5930 break; 5931 }; 5932 } 5933 return NULL; 5934 } 5935 5936 uint8_t gap_connect_cancel(void){ 5937 hci_connection_t * conn = gap_get_outgoing_connection(); 5938 if (!conn) return 0; 5939 switch (conn->state){ 5940 case SEND_CREATE_CONNECTION: 5941 // skip sending create connection and emit event instead 5942 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5943 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5944 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5945 btstack_memory_hci_connection_free( conn ); 5946 break; 5947 case SENT_CREATE_CONNECTION: 5948 // request to send cancel connection 5949 conn->state = SEND_CANCEL_CONNECTION; 5950 hci_run(); 5951 break; 5952 default: 5953 break; 5954 } 5955 return 0; 5956 } 5957 #endif 5958 5959 #ifdef ENABLE_LE_CENTRAL 5960 /** 5961 * @brief Set connection parameters for outgoing connections 5962 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5963 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5964 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5965 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5966 * @param conn_latency, default: 4 5967 * @param supervision_timeout (unit: 10ms), default: 720 ms 5968 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5969 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5970 */ 5971 5972 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5973 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5974 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5975 hci_stack->le_connection_scan_interval = conn_scan_interval; 5976 hci_stack->le_connection_scan_window = conn_scan_window; 5977 hci_stack->le_connection_interval_min = conn_interval_min; 5978 hci_stack->le_connection_interval_max = conn_interval_max; 5979 hci_stack->le_connection_latency = conn_latency; 5980 hci_stack->le_supervision_timeout = supervision_timeout; 5981 hci_stack->le_minimum_ce_length = min_ce_length; 5982 hci_stack->le_maximum_ce_length = max_ce_length; 5983 } 5984 #endif 5985 5986 /** 5987 * @brief Updates the connection parameters for a given LE connection 5988 * @param handle 5989 * @param conn_interval_min (unit: 1.25ms) 5990 * @param conn_interval_max (unit: 1.25ms) 5991 * @param conn_latency 5992 * @param supervision_timeout (unit: 10ms) 5993 * @returns 0 if ok 5994 */ 5995 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5996 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5997 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5998 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5999 connection->le_conn_interval_min = conn_interval_min; 6000 connection->le_conn_interval_max = conn_interval_max; 6001 connection->le_conn_latency = conn_latency; 6002 connection->le_supervision_timeout = supervision_timeout; 6003 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6004 hci_run(); 6005 return 0; 6006 } 6007 6008 /** 6009 * @brief Request an update of the connection parameter for a given LE connection 6010 * @param handle 6011 * @param conn_interval_min (unit: 1.25ms) 6012 * @param conn_interval_max (unit: 1.25ms) 6013 * @param conn_latency 6014 * @param supervision_timeout (unit: 10ms) 6015 * @returns 0 if ok 6016 */ 6017 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6018 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6019 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6020 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6021 connection->le_conn_interval_min = conn_interval_min; 6022 connection->le_conn_interval_max = conn_interval_max; 6023 connection->le_conn_latency = conn_latency; 6024 connection->le_supervision_timeout = supervision_timeout; 6025 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6026 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6027 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6028 return 0; 6029 } 6030 6031 #ifdef ENABLE_LE_PERIPHERAL 6032 6033 /** 6034 * @brief Set Advertisement Data 6035 * @param advertising_data_length 6036 * @param advertising_data (max 31 octets) 6037 * @note data is not copied, pointer has to stay valid 6038 */ 6039 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6040 hci_stack->le_advertisements_data_len = advertising_data_length; 6041 hci_stack->le_advertisements_data = advertising_data; 6042 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6043 hci_run(); 6044 } 6045 6046 /** 6047 * @brief Set Scan Response Data 6048 * @param advertising_data_length 6049 * @param advertising_data (max 31 octets) 6050 * @note data is not copied, pointer has to stay valid 6051 */ 6052 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6053 hci_stack->le_scan_response_data_len = scan_response_data_length; 6054 hci_stack->le_scan_response_data = scan_response_data; 6055 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6056 hci_run(); 6057 } 6058 6059 /** 6060 * @brief Set Advertisement Parameters 6061 * @param adv_int_min 6062 * @param adv_int_max 6063 * @param adv_type 6064 * @param direct_address_type 6065 * @param direct_address 6066 * @param channel_map 6067 * @param filter_policy 6068 * 6069 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6070 */ 6071 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6072 uint8_t direct_address_typ, bd_addr_t direct_address, 6073 uint8_t channel_map, uint8_t filter_policy) { 6074 6075 hci_stack->le_advertisements_interval_min = adv_int_min; 6076 hci_stack->le_advertisements_interval_max = adv_int_max; 6077 hci_stack->le_advertisements_type = adv_type; 6078 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6079 hci_stack->le_advertisements_channel_map = channel_map; 6080 hci_stack->le_advertisements_filter_policy = filter_policy; 6081 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6082 6); 6083 6084 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6085 hci_run(); 6086 } 6087 6088 /** 6089 * @brief Enable/Disable Advertisements 6090 * @param enabled 6091 */ 6092 void gap_advertisements_enable(int enabled){ 6093 hci_stack->le_advertisements_enabled = enabled != 0; 6094 hci_update_advertisements_enabled_for_current_roles(); 6095 hci_run(); 6096 } 6097 6098 #endif 6099 6100 void hci_le_set_own_address_type(uint8_t own_address_type){ 6101 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6102 if (own_address_type == hci_stack->le_own_addr_type) return; 6103 hci_stack->le_own_addr_type = own_address_type; 6104 6105 #ifdef ENABLE_LE_PERIPHERAL 6106 // update advertisement parameters, too 6107 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6108 hci_run(); 6109 #endif 6110 #ifdef ENABLE_LE_CENTRAL 6111 // note: we don't update scan parameters or modify ongoing connection attempts 6112 #endif 6113 } 6114 6115 #endif 6116 6117 uint8_t gap_disconnect(hci_con_handle_t handle){ 6118 hci_connection_t * conn = hci_connection_for_handle(handle); 6119 if (!conn){ 6120 hci_emit_disconnection_complete(handle, 0); 6121 return 0; 6122 } 6123 // ignore if already disconnected 6124 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6125 return 0; 6126 } 6127 conn->state = SEND_DISCONNECT; 6128 hci_run(); 6129 return 0; 6130 } 6131 6132 int gap_read_rssi(hci_con_handle_t con_handle){ 6133 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6134 if (hci_connection == NULL) return 0; 6135 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6136 hci_run(); 6137 return 1; 6138 } 6139 6140 /** 6141 * @brief Get connection type 6142 * @param con_handle 6143 * @result connection_type 6144 */ 6145 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6146 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6147 if (!conn) return GAP_CONNECTION_INVALID; 6148 switch (conn->address_type){ 6149 case BD_ADDR_TYPE_LE_PUBLIC: 6150 case BD_ADDR_TYPE_LE_RANDOM: 6151 return GAP_CONNECTION_LE; 6152 case BD_ADDR_TYPE_SCO: 6153 return GAP_CONNECTION_SCO; 6154 case BD_ADDR_TYPE_ACL: 6155 return GAP_CONNECTION_ACL; 6156 default: 6157 return GAP_CONNECTION_INVALID; 6158 } 6159 } 6160 6161 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6162 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6163 if (!conn) return HCI_ROLE_INVALID; 6164 return (hci_role_t) conn->role; 6165 } 6166 6167 6168 #ifdef ENABLE_CLASSIC 6169 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6170 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6171 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6172 conn->request_role = role; 6173 hci_run(); 6174 return ERROR_CODE_SUCCESS; 6175 } 6176 #endif 6177 6178 #ifdef ENABLE_BLE 6179 6180 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){ 6181 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6182 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6183 6184 conn->le_phy_update_all_phys = all_phys; 6185 conn->le_phy_update_tx_phys = tx_phys; 6186 conn->le_phy_update_rx_phys = rx_phys; 6187 conn->le_phy_update_phy_options = phy_options; 6188 6189 hci_run(); 6190 6191 return 0; 6192 } 6193 6194 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6195 // check if already in list 6196 btstack_linked_list_iterator_t it; 6197 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6198 while (btstack_linked_list_iterator_has_next(&it)) { 6199 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6200 if (entry->address_type != address_type) { 6201 continue; 6202 } 6203 if (memcmp(entry->address, address, 6) != 0) { 6204 continue; 6205 } 6206 // disallow if already scheduled to add 6207 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6208 return ERROR_CODE_COMMAND_DISALLOWED; 6209 } 6210 // still on controller, but scheduled to remove -> re-add 6211 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6212 return ERROR_CODE_SUCCESS; 6213 } 6214 // alloc and add to list 6215 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6216 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6217 entry->address_type = address_type; 6218 (void)memcpy(entry->address, address, 6); 6219 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6220 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6221 return ERROR_CODE_SUCCESS; 6222 } 6223 6224 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6225 btstack_linked_list_iterator_t it; 6226 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6227 while (btstack_linked_list_iterator_has_next(&it)){ 6228 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6229 if (entry->address_type != address_type) { 6230 continue; 6231 } 6232 if (memcmp(entry->address, address, 6) != 0) { 6233 continue; 6234 } 6235 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6236 // remove from controller if already present 6237 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6238 } else { 6239 // directly remove entry from whitelist 6240 btstack_linked_list_iterator_remove(&it); 6241 btstack_memory_whitelist_entry_free(entry); 6242 } 6243 return ERROR_CODE_SUCCESS; 6244 } 6245 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6246 } 6247 6248 static void hci_whitelist_clear(void){ 6249 btstack_linked_list_iterator_t it; 6250 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6251 while (btstack_linked_list_iterator_has_next(&it)){ 6252 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6253 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6254 // remove from controller if already present 6255 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6256 continue; 6257 } 6258 // directly remove entry from whitelist 6259 btstack_linked_list_iterator_remove(&it); 6260 btstack_memory_whitelist_entry_free(entry); 6261 } 6262 } 6263 6264 /** 6265 * @brief Clear Whitelist 6266 * @returns 0 if ok 6267 */ 6268 uint8_t gap_whitelist_clear(void){ 6269 hci_whitelist_clear(); 6270 hci_run(); 6271 return ERROR_CODE_SUCCESS; 6272 } 6273 6274 /** 6275 * @brief Add Device to Whitelist 6276 * @param address_typ 6277 * @param address 6278 * @returns 0 if ok 6279 */ 6280 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6281 uint8_t status = hci_whitelist_add(address_type, address); 6282 if (status){ 6283 return status; 6284 } 6285 hci_run(); 6286 return ERROR_CODE_SUCCESS; 6287 } 6288 6289 /** 6290 * @brief Remove Device from Whitelist 6291 * @param address_typ 6292 * @param address 6293 * @returns 0 if ok 6294 */ 6295 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6296 uint8_t status = hci_whitelist_remove(address_type, address); 6297 if (status){ 6298 return status; 6299 } 6300 hci_run(); 6301 return ERROR_CODE_SUCCESS; 6302 } 6303 6304 #ifdef ENABLE_LE_CENTRAL 6305 /** 6306 * @brief Connect with Whitelist 6307 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6308 * @returns - if ok 6309 */ 6310 uint8_t gap_connect_with_whitelist(void){ 6311 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6312 return ERROR_CODE_COMMAND_DISALLOWED; 6313 } 6314 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6315 hci_run(); 6316 return ERROR_CODE_SUCCESS; 6317 } 6318 6319 /** 6320 * @brief Auto Connection Establishment - Start Connecting to device 6321 * @param address_typ 6322 * @param address 6323 * @returns 0 if ok 6324 */ 6325 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6326 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6327 return ERROR_CODE_COMMAND_DISALLOWED; 6328 } 6329 6330 uint8_t status = hci_whitelist_add(address_type, address); 6331 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6332 return status; 6333 } 6334 6335 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6336 6337 hci_run(); 6338 return ERROR_CODE_SUCCESS; 6339 } 6340 6341 /** 6342 * @brief Auto Connection Establishment - Stop Connecting to device 6343 * @param address_typ 6344 * @param address 6345 * @returns 0 if ok 6346 */ 6347 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6348 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6349 return ERROR_CODE_COMMAND_DISALLOWED; 6350 } 6351 6352 hci_whitelist_remove(address_type, address); 6353 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6354 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6355 } 6356 hci_run(); 6357 return 0; 6358 } 6359 6360 /** 6361 * @brief Auto Connection Establishment - Stop everything 6362 * @note Convenience function to stop all active auto connection attempts 6363 */ 6364 uint8_t gap_auto_connection_stop_all(void){ 6365 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6366 return ERROR_CODE_COMMAND_DISALLOWED; 6367 } 6368 hci_whitelist_clear(); 6369 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6370 hci_run(); 6371 return ERROR_CODE_SUCCESS; 6372 } 6373 6374 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6375 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6376 if (!conn) return 0; 6377 return conn->le_connection_interval; 6378 } 6379 #endif 6380 #endif 6381 6382 #ifdef ENABLE_CLASSIC 6383 /** 6384 * @brief Set Extended Inquiry Response data 6385 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6386 * @note has to be done before stack starts up 6387 */ 6388 void gap_set_extended_inquiry_response(const uint8_t * data){ 6389 hci_stack->eir_data = data; 6390 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6391 hci_run(); 6392 } 6393 6394 /** 6395 * @brief Start GAP Classic Inquiry 6396 * @param duration in 1.28s units 6397 * @return 0 if ok 6398 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6399 */ 6400 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6401 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6402 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6403 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6404 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6405 } 6406 hci_stack->inquiry_state = duration_in_1280ms_units; 6407 hci_run(); 6408 return 0; 6409 } 6410 6411 /** 6412 * @brief Stop GAP Classic Inquiry 6413 * @returns 0 if ok 6414 */ 6415 int gap_inquiry_stop(void){ 6416 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6417 // emit inquiry complete event, before it even started 6418 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6419 hci_emit_event(event, sizeof(event), 1); 6420 return 0; 6421 } 6422 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6423 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6424 hci_run(); 6425 return 0; 6426 } 6427 6428 void gap_inquiry_set_lap(uint32_t lap){ 6429 hci_stack->inquiry_lap = lap; 6430 } 6431 6432 6433 /** 6434 * @brief Remote Name Request 6435 * @param addr 6436 * @param page_scan_repetition_mode 6437 * @param clock_offset only used when bit 15 is set 6438 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6439 */ 6440 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6441 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6442 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6443 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6444 hci_stack->remote_name_clock_offset = clock_offset; 6445 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6446 hci_run(); 6447 return 0; 6448 } 6449 6450 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6451 hci_stack->gap_pairing_state = state; 6452 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6453 hci_run(); 6454 return 0; 6455 } 6456 6457 /** 6458 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6459 * @param addr 6460 * @param pin_data 6461 * @param pin_len 6462 * @return 0 if ok 6463 */ 6464 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6465 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6466 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6467 hci_stack->gap_pairing_pin_len = pin_len; 6468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6469 } 6470 6471 /** 6472 * @brief Legacy Pairing Pin Code Response 6473 * @param addr 6474 * @param pin 6475 * @return 0 if ok 6476 */ 6477 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6478 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6479 } 6480 6481 /** 6482 * @brief Abort Legacy Pairing 6483 * @param addr 6484 * @param pin 6485 * @return 0 if ok 6486 */ 6487 int gap_pin_code_negative(bd_addr_t addr){ 6488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6489 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6490 } 6491 6492 /** 6493 * @brief SSP Passkey Response 6494 * @param addr 6495 * @param passkey 6496 * @return 0 if ok 6497 */ 6498 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6499 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6500 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6501 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6502 } 6503 6504 /** 6505 * @brief Abort SSP Passkey Entry/Pairing 6506 * @param addr 6507 * @param pin 6508 * @return 0 if ok 6509 */ 6510 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6511 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6512 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6513 } 6514 6515 /** 6516 * @brief Accept SSP Numeric Comparison 6517 * @param addr 6518 * @param passkey 6519 * @return 0 if ok 6520 */ 6521 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6522 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6523 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6524 } 6525 6526 /** 6527 * @brief Abort SSP Numeric Comparison/Pairing 6528 * @param addr 6529 * @param pin 6530 * @return 0 if ok 6531 */ 6532 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6533 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6534 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6535 } 6536 6537 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6538 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6539 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6540 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6541 connectionSetAuthenticationFlags(conn, flag); 6542 hci_run(); 6543 return ERROR_CODE_SUCCESS; 6544 } 6545 #endif 6546 6547 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6548 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6549 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6550 } 6551 6552 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6553 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6554 } 6555 #endif 6556 6557 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6558 /** 6559 * @brief Report Remote OOB Data 6560 * @param bd_addr 6561 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6562 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6563 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6564 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6565 */ 6566 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){ 6567 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6568 if (connection == NULL) { 6569 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6570 } 6571 connection->classic_oob_c_192 = c_192; 6572 connection->classic_oob_r_192 = r_192; 6573 6574 // ignore P-256 if not supported by us 6575 if (hci_stack->secure_connections_active){ 6576 connection->classic_oob_c_256 = c_256; 6577 connection->classic_oob_r_256 = r_256; 6578 } 6579 6580 return ERROR_CODE_SUCCESS; 6581 } 6582 /** 6583 * @brief Generate new OOB data 6584 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6585 */ 6586 void gap_ssp_generate_oob_data(void){ 6587 hci_stack->classic_read_local_oob_data = true; 6588 hci_run(); 6589 } 6590 6591 #endif 6592 6593 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6594 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6595 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6596 if (connection == NULL) { 6597 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6598 } 6599 6600 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6601 connection->link_key_type = type; 6602 6603 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6604 } 6605 6606 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6607 /** 6608 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6609 * @param inquiry_mode see bluetooth_defines.h 6610 */ 6611 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6612 hci_stack->inquiry_mode = inquiry_mode; 6613 } 6614 6615 /** 6616 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6617 */ 6618 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6619 hci_stack->sco_voice_setting = voice_setting; 6620 } 6621 6622 /** 6623 * @brief Get SCO Voice Setting 6624 * @return current voice setting 6625 */ 6626 uint16_t hci_get_sco_voice_setting(void){ 6627 return hci_stack->sco_voice_setting; 6628 } 6629 6630 static int hci_have_usb_transport(void){ 6631 if (!hci_stack->hci_transport) return 0; 6632 const char * transport_name = hci_stack->hci_transport->name; 6633 if (!transport_name) return 0; 6634 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6635 } 6636 6637 /** @brief Get SCO packet length for current SCO Voice setting 6638 * @note Using SCO packets of the exact length is required for USB transfer 6639 * @return Length of SCO packets in bytes (not audio frames) 6640 */ 6641 uint16_t hci_get_sco_packet_length(void){ 6642 uint16_t sco_packet_length = 0; 6643 6644 #ifdef ENABLE_SCO_OVER_HCI 6645 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6646 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6647 6648 if (hci_have_usb_transport()){ 6649 // see Core Spec for H2 USB Transfer. 6650 // 3 byte SCO header + 24 bytes per connection 6651 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6652 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6653 } else { 6654 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6655 sco_packet_length = 3 + 60 * multiplier; 6656 // assert that it still fits inside an SCO buffer 6657 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6658 sco_packet_length = 3 + 60; 6659 } 6660 } 6661 #endif 6662 6663 #ifdef HAVE_SCO_TRANSPORT 6664 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6665 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6666 sco_packet_length = 3 + 60 * multiplier; 6667 #endif 6668 return sco_packet_length; 6669 } 6670 6671 /** 6672 * @brief Sets the master/slave policy 6673 * @param policy (0: attempt to become master, 1: let connecting device decide) 6674 */ 6675 void hci_set_master_slave_policy(uint8_t policy){ 6676 hci_stack->master_slave_policy = policy; 6677 } 6678 6679 #endif 6680 6681 HCI_STATE hci_get_state(void){ 6682 return hci_stack->state; 6683 } 6684 6685 #ifdef ENABLE_CLASSIC 6686 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6687 hci_stack->gap_classic_accept_callback = accept_callback; 6688 } 6689 #endif 6690 6691 /** 6692 * @brief Set callback for Bluetooth Hardware Error 6693 */ 6694 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6695 hci_stack->hardware_error_callback = fn; 6696 } 6697 6698 void hci_disconnect_all(void){ 6699 btstack_linked_list_iterator_t it; 6700 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6701 while (btstack_linked_list_iterator_has_next(&it)){ 6702 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6703 if (con->state == SENT_DISCONNECT) continue; 6704 con->state = SEND_DISCONNECT; 6705 } 6706 hci_run(); 6707 } 6708 6709 uint16_t hci_get_manufacturer(void){ 6710 return hci_stack->manufacturer; 6711 } 6712 6713 #ifdef ENABLE_BLE 6714 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6715 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6716 if (!hci_con) return NULL; 6717 return &hci_con->sm_connection; 6718 } 6719 6720 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6721 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6722 #endif 6723 6724 int gap_encryption_key_size(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 if (hci_is_le_connection(hci_connection)){ 6728 #ifdef ENABLE_BLE 6729 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6730 if (sm_conn->sm_connection_encrypted) { 6731 return sm_conn->sm_actual_encryption_key_size; 6732 } 6733 #endif 6734 } else { 6735 #ifdef ENABLE_CLASSIC 6736 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6737 return hci_connection->encryption_key_size; 6738 } 6739 #endif 6740 } 6741 return 0; 6742 } 6743 6744 int gap_authenticated(hci_con_handle_t con_handle){ 6745 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6746 if (hci_connection == NULL) return 0; 6747 6748 switch (hci_connection->address_type){ 6749 #ifdef ENABLE_BLE 6750 case BD_ADDR_TYPE_LE_PUBLIC: 6751 case BD_ADDR_TYPE_LE_RANDOM: 6752 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6753 return hci_connection->sm_connection.sm_connection_authenticated; 6754 #endif 6755 #ifdef ENABLE_CLASSIC 6756 case BD_ADDR_TYPE_SCO: 6757 case BD_ADDR_TYPE_ACL: 6758 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6759 #endif 6760 default: 6761 return 0; 6762 } 6763 } 6764 6765 int gap_secure_connection(hci_con_handle_t con_handle){ 6766 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6767 if (hci_connection == NULL) return 0; 6768 6769 switch (hci_connection->address_type){ 6770 #ifdef ENABLE_BLE 6771 case BD_ADDR_TYPE_LE_PUBLIC: 6772 case BD_ADDR_TYPE_LE_RANDOM: 6773 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6774 return hci_connection->sm_connection.sm_connection_sc; 6775 #endif 6776 #ifdef ENABLE_CLASSIC 6777 case BD_ADDR_TYPE_SCO: 6778 case BD_ADDR_TYPE_ACL: 6779 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6780 #endif 6781 default: 6782 return 0; 6783 } 6784 } 6785 6786 bool gap_bonded(hci_con_handle_t con_handle){ 6787 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6788 if (hci_connection == NULL) return 0; 6789 6790 #ifdef ENABLE_CLASSIC 6791 link_key_t link_key; 6792 link_key_type_t link_key_type; 6793 #endif 6794 switch (hci_connection->address_type){ 6795 #ifdef ENABLE_BLE 6796 case BD_ADDR_TYPE_LE_PUBLIC: 6797 case BD_ADDR_TYPE_LE_RANDOM: 6798 return hci_connection->sm_connection.sm_le_db_index >= 0; 6799 #endif 6800 #ifdef ENABLE_CLASSIC 6801 case BD_ADDR_TYPE_SCO: 6802 case BD_ADDR_TYPE_ACL: 6803 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6804 #endif 6805 default: 6806 return false; 6807 } 6808 } 6809 6810 #ifdef ENABLE_BLE 6811 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6812 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6813 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6814 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6815 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6816 return sm_conn->sm_connection_authorization_state; 6817 } 6818 #endif 6819 6820 #ifdef ENABLE_CLASSIC 6821 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){ 6822 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6823 if (!conn) return GAP_CONNECTION_INVALID; 6824 conn->sniff_min_interval = sniff_min_interval; 6825 conn->sniff_max_interval = sniff_max_interval; 6826 conn->sniff_attempt = sniff_attempt; 6827 conn->sniff_timeout = sniff_timeout; 6828 hci_run(); 6829 return 0; 6830 } 6831 6832 /** 6833 * @brief Exit Sniff mode 6834 * @param con_handle 6835 @ @return 0 if ok 6836 */ 6837 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6838 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6839 if (!conn) return GAP_CONNECTION_INVALID; 6840 conn->sniff_min_interval = 0xffff; 6841 hci_run(); 6842 return 0; 6843 } 6844 6845 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){ 6846 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6847 if (!conn) return GAP_CONNECTION_INVALID; 6848 conn->sniff_subrating_max_latency = max_latency; 6849 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6850 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6851 hci_run(); 6852 return ERROR_CODE_SUCCESS; 6853 } 6854 6855 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){ 6856 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6857 if (!conn) return GAP_CONNECTION_INVALID; 6858 conn->qos_service_type = service_type; 6859 conn->qos_token_rate = token_rate; 6860 conn->qos_peak_bandwidth = peak_bandwidth; 6861 conn->qos_latency = latency; 6862 conn->qos_delay_variation = delay_variation; 6863 hci_run(); 6864 return ERROR_CODE_SUCCESS; 6865 } 6866 6867 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6868 hci_stack->new_page_scan_interval = page_scan_interval; 6869 hci_stack->new_page_scan_window = page_scan_window; 6870 hci_run(); 6871 } 6872 6873 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6874 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6875 hci_run(); 6876 } 6877 6878 #endif 6879 6880 void hci_halting_defer(void){ 6881 if (hci_stack->state != HCI_STATE_HALTING) return; 6882 switch (hci_stack->substate){ 6883 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6884 case HCI_HALTING_CLOSE: 6885 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6886 break; 6887 default: 6888 break; 6889 } 6890 } 6891 6892 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6893 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6894 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6895 if (le_device_db_index >= le_device_db_max_count()) return; 6896 uint8_t offset = le_device_db_index >> 3; 6897 uint8_t mask = 1 << (le_device_db_index & 7); 6898 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6899 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6900 // note: go back to remove entries, otherwise, a remove + add will skip the add 6901 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6902 } 6903 } 6904 6905 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6906 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6907 if (le_device_db_index >= le_device_db_max_count()) return; 6908 uint8_t offset = le_device_db_index >> 3; 6909 uint8_t mask = 1 << (le_device_db_index & 7); 6910 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6911 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6912 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6913 } 6914 } 6915 6916 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6917 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6918 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6919 } 6920 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6921 // restart le resolving list update 6922 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6923 } 6924 return ERROR_CODE_SUCCESS; 6925 } 6926 #endif 6927 6928 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6929 void hci_setup_test_connections_fuzz(void){ 6930 hci_connection_t * conn; 6931 6932 // default address: 66:55:44:33:00:01 6933 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6934 6935 // setup Controller info 6936 hci_stack->num_cmd_packets = 255; 6937 hci_stack->acl_packets_total_num = 255; 6938 6939 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6940 addr[5] = 0x01; 6941 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6942 conn->con_handle = addr[5]; 6943 conn->role = HCI_ROLE_SLAVE; 6944 conn->state = RECEIVED_CONNECTION_REQUEST; 6945 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6946 6947 // setup incoming Classic SCO connection with con handle 0x0002 6948 addr[5] = 0x02; 6949 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6950 conn->con_handle = addr[5]; 6951 conn->role = HCI_ROLE_SLAVE; 6952 conn->state = RECEIVED_CONNECTION_REQUEST; 6953 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6954 6955 // setup ready Classic ACL connection with con handle 0x0003 6956 addr[5] = 0x03; 6957 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6958 conn->con_handle = addr[5]; 6959 conn->role = HCI_ROLE_SLAVE; 6960 conn->state = OPEN; 6961 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6962 6963 // setup ready Classic SCO connection with con handle 0x0004 6964 addr[5] = 0x04; 6965 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6966 conn->con_handle = addr[5]; 6967 conn->role = HCI_ROLE_SLAVE; 6968 conn->state = OPEN; 6969 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6970 6971 // setup ready LE ACL connection with con handle 0x005 and public address 6972 addr[5] = 0x05; 6973 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6974 conn->con_handle = addr[5]; 6975 conn->role = HCI_ROLE_SLAVE; 6976 conn->state = OPEN; 6977 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6978 conn->sm_connection.sm_connection_encrypted = 1; 6979 } 6980 6981 void hci_free_connections_fuzz(void){ 6982 btstack_linked_list_iterator_t it; 6983 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6984 while (btstack_linked_list_iterator_has_next(&it)){ 6985 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6986 btstack_linked_list_iterator_remove(&it); 6987 btstack_memory_hci_connection_free(con); 6988 } 6989 } 6990 void hci_simulate_working_fuzz(void){ 6991 hci_init_done(); 6992 hci_stack->num_cmd_packets = 255; 6993 } 6994 #endif 6995