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 hci_event_link_key_request_get_bd_addr(packet, addr); 2831 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2832 if (!conn) break; 2833 2834 // lookup link key in db if not cached 2835 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2836 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2837 } 2838 2839 // response sent by hci_run() 2840 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2841 #endif 2842 break; 2843 2844 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2845 hci_event_link_key_request_get_bd_addr(packet, addr); 2846 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2847 if (!conn) break; 2848 2849 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2850 2851 // CVE-2020-26555: ignore NULL link key 2852 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2853 if (btstack_is_null(&packet[8], 16)) break; 2854 2855 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2856 // Change Connection Encryption keeps link key type 2857 if (link_key_type != CHANGED_COMBINATION_KEY){ 2858 conn->link_key_type = link_key_type; 2859 } 2860 2861 // cache link key. link keys stored in little-endian format for legacy reasons 2862 memcpy(&conn->link_key, &packet[8], 16); 2863 2864 // only store link key: 2865 // - if bondable enabled 2866 if (hci_stack->bondable == false) break; 2867 // - if security level sufficient 2868 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2869 // - for SSP, also check if remote side requested bonding as well 2870 if (conn->link_key_type != COMBINATION_KEY){ 2871 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2872 if (!remote_bonding){ 2873 break; 2874 } 2875 } 2876 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2877 break; 2878 } 2879 2880 case HCI_EVENT_PIN_CODE_REQUEST: 2881 hci_event_pin_code_request_get_bd_addr(packet, addr); 2882 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2883 if (!conn) break; 2884 2885 hci_pairing_started(conn, false); 2886 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2887 if (!hci_stack->bondable ){ 2888 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2889 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2890 hci_run(); 2891 return; 2892 } 2893 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2894 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2895 log_info("Level 4 required, but SC not supported -> abort"); 2896 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2897 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2898 hci_run(); 2899 return; 2900 } 2901 break; 2902 2903 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2904 hci_event_io_capability_response_get_bd_addr(packet, addr); 2905 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2906 if (!conn) break; 2907 2908 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2909 hci_pairing_started(conn, true); 2910 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2911 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2912 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2913 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2914 #endif 2915 break; 2916 2917 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2918 hci_event_io_capability_response_get_bd_addr(packet, addr); 2919 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2920 if (!conn) break; 2921 2922 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2923 hci_connection_timestamp(conn); 2924 hci_pairing_started(conn, true); 2925 break; 2926 2927 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2928 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2929 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2930 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2931 if (!conn) break; 2932 2933 hci_connection_timestamp(conn); 2934 2935 hci_pairing_started(conn, true); 2936 2937 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2938 break; 2939 #endif 2940 2941 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2942 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2943 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2944 if (!conn) break; 2945 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2946 if (hci_stack->ssp_auto_accept){ 2947 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2948 }; 2949 } else { 2950 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2951 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2952 // don't forward event to app 2953 hci_run(); 2954 return; 2955 } 2956 break; 2957 2958 case HCI_EVENT_USER_PASSKEY_REQUEST: 2959 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2960 if (hci_stack->ssp_auto_accept){ 2961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2962 }; 2963 break; 2964 2965 case HCI_EVENT_MODE_CHANGE: 2966 handle = hci_event_mode_change_get_handle(packet); 2967 conn = hci_connection_for_handle(handle); 2968 if (!conn) break; 2969 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2970 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2971 break; 2972 #endif 2973 2974 case HCI_EVENT_ENCRYPTION_CHANGE: 2975 handle = hci_event_encryption_change_get_connection_handle(packet); 2976 conn = hci_connection_for_handle(handle); 2977 if (!conn) break; 2978 if (hci_event_encryption_change_get_status(packet) == 0u) { 2979 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2980 if (encryption_enabled){ 2981 if (hci_is_le_connection(conn)){ 2982 // For LE, we accept connection as encrypted 2983 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2984 } 2985 #ifdef ENABLE_CLASSIC 2986 else { 2987 2988 // dedicated bonding: send result and disconnect 2989 if (conn->bonding_flags & BONDING_DEDICATED){ 2990 conn->bonding_flags &= ~BONDING_DEDICATED; 2991 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2992 conn->bonding_status = packet[2]; 2993 break; 2994 } 2995 2996 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2997 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2998 bool connected_uses_aes_ccm = encryption_enabled == 2; 2999 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3000 log_info("SC during pairing, but only E0 now -> abort"); 3001 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3002 break; 3003 } 3004 3005 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3006 if (connected_uses_aes_ccm){ 3007 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3008 } 3009 3010 #ifdef ENABLE_TESTING_SUPPORT 3011 // work around for issue with PTS dongle 3012 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3013 #endif 3014 3015 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3016 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3017 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3018 } else { 3019 // if not, pretend everything is perfect 3020 hci_handle_read_encryption_key_size_complete(conn, 16); 3021 } 3022 } 3023 #endif 3024 } else { 3025 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3026 } 3027 } 3028 3029 break; 3030 3031 #ifdef ENABLE_CLASSIC 3032 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3033 handle = hci_event_authentication_complete_get_connection_handle(packet); 3034 conn = hci_connection_for_handle(handle); 3035 if (!conn) break; 3036 3037 // clear authentication active flag 3038 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3039 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3040 3041 // authenticated only if auth status == 0 3042 if (hci_event_authentication_complete_get_status(packet) == 0){ 3043 // authenticated 3044 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3045 3046 // If not already encrypted, start encryption 3047 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3048 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3049 break; 3050 } 3051 } 3052 3053 // emit updated security level 3054 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3055 break; 3056 3057 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3058 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3059 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3060 if (!conn) break; 3061 3062 // treat successfully paired connection as authenticated 3063 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3064 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3065 } 3066 3067 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3068 break; 3069 #endif 3070 3071 // HCI_EVENT_DISCONNECTION_COMPLETE 3072 // has been split, to first notify stack before shutting connection down 3073 // see end of function, too. 3074 case HCI_EVENT_DISCONNECTION_COMPLETE: 3075 if (packet[2]) break; // status != 0 3076 handle = little_endian_read_16(packet, 3); 3077 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3078 if (hci_stack->acl_fragmentation_total_size > 0u) { 3079 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3080 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3081 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3082 hci_stack->acl_fragmentation_total_size = 0; 3083 hci_stack->acl_fragmentation_pos = 0; 3084 if (release_buffer){ 3085 hci_release_packet_buffer(); 3086 } 3087 } 3088 } 3089 3090 conn = hci_connection_for_handle(handle); 3091 if (!conn) break; 3092 #ifdef ENABLE_CLASSIC 3093 // pairing failed if it was ongoing 3094 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3095 #endif 3096 3097 // emit dedicatd bonding event 3098 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3099 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3100 } 3101 3102 // mark connection for shutdown, stop timers, reset state 3103 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3104 hci_connection_stop_timer(conn); 3105 hci_connection_init(conn); 3106 3107 #ifdef ENABLE_BLE 3108 #ifdef ENABLE_LE_PERIPHERAL 3109 // re-enable advertisements for le connections if active 3110 if (hci_is_le_connection(conn)){ 3111 hci_update_advertisements_enabled_for_current_roles(); 3112 } 3113 #endif 3114 #endif 3115 break; 3116 3117 case HCI_EVENT_HARDWARE_ERROR: 3118 log_error("Hardware Error: 0x%02x", packet[2]); 3119 if (hci_stack->hardware_error_callback){ 3120 (*hci_stack->hardware_error_callback)(packet[2]); 3121 } else { 3122 // if no special requests, just reboot stack 3123 hci_power_control_off(); 3124 hci_power_control_on(); 3125 } 3126 break; 3127 3128 #ifdef ENABLE_CLASSIC 3129 case HCI_EVENT_ROLE_CHANGE: 3130 if (packet[2]) break; // status != 0 3131 reverse_bd_addr(&packet[3], addr); 3132 addr_type = BD_ADDR_TYPE_ACL; 3133 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3134 if (!conn) break; 3135 conn->role = packet[9]; 3136 break; 3137 #endif 3138 3139 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3140 // release packet buffer only for asynchronous transport and if there are not further fragements 3141 if (hci_transport_synchronous()) { 3142 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3143 return; // instead of break: to avoid re-entering hci_run() 3144 } 3145 hci_stack->acl_fragmentation_tx_active = 0; 3146 if (hci_stack->acl_fragmentation_total_size) break; 3147 hci_release_packet_buffer(); 3148 3149 // L2CAP receives this event via the hci_emit_event below 3150 3151 #ifdef ENABLE_CLASSIC 3152 // For SCO, we do the can_send_now_check here 3153 hci_notify_if_sco_can_send_now(); 3154 #endif 3155 break; 3156 3157 #ifdef ENABLE_CLASSIC 3158 case HCI_EVENT_SCO_CAN_SEND_NOW: 3159 // For SCO, we do the can_send_now_check here 3160 hci_stack->sco_can_send_now = true; 3161 hci_notify_if_sco_can_send_now(); 3162 return; 3163 3164 // explode inquriy results for easier consumption 3165 case HCI_EVENT_INQUIRY_RESULT: 3166 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3167 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3168 gap_inquiry_explode(packet, size); 3169 break; 3170 #endif 3171 3172 #ifdef ENABLE_BLE 3173 case HCI_EVENT_LE_META: 3174 switch (packet[2]){ 3175 #ifdef ENABLE_LE_CENTRAL 3176 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3177 // log_info("advertising report received"); 3178 if (!hci_stack->le_scanning_enabled) break; 3179 le_handle_advertisement_report(packet, size); 3180 break; 3181 #endif 3182 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3183 event_handle_le_connection_complete(packet); 3184 break; 3185 3186 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3187 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3188 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3189 conn = hci_connection_for_handle(handle); 3190 if (!conn) break; 3191 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3192 break; 3193 3194 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3195 // connection 3196 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3197 conn = hci_connection_for_handle(handle); 3198 if (conn) { 3199 // read arguments 3200 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3201 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3202 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3203 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3204 3205 // validate against current connection parameter range 3206 le_connection_parameter_range_t existing_range; 3207 gap_get_connection_parameter_range(&existing_range); 3208 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3209 if (update_parameter){ 3210 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3211 conn->le_conn_interval_min = le_conn_interval_min; 3212 conn->le_conn_interval_max = le_conn_interval_max; 3213 conn->le_conn_latency = le_conn_latency; 3214 conn->le_supervision_timeout = le_supervision_timeout; 3215 } else { 3216 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3217 } 3218 } 3219 break; 3220 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3221 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3222 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3223 conn = hci_connection_for_handle(handle); 3224 if (conn) { 3225 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3226 } 3227 break; 3228 #endif 3229 default: 3230 break; 3231 } 3232 break; 3233 #endif 3234 case HCI_EVENT_VENDOR_SPECIFIC: 3235 // Vendor specific commands often create vendor specific event instead of num completed packets 3236 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3237 switch (hci_stack->manufacturer){ 3238 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3239 hci_stack->num_cmd_packets = 1; 3240 break; 3241 default: 3242 break; 3243 } 3244 break; 3245 default: 3246 break; 3247 } 3248 3249 handle_event_for_current_stack_state(packet, size); 3250 3251 // notify upper stack 3252 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3253 3254 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3255 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3256 handle = little_endian_read_16(packet, 3); 3257 hci_connection_t * aConn = hci_connection_for_handle(handle); 3258 // discard connection if app did not trigger a reconnect in the event handler 3259 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3260 hci_shutdown_connection(aConn); 3261 } 3262 } 3263 3264 // execute main loop 3265 hci_run(); 3266 } 3267 3268 #ifdef ENABLE_CLASSIC 3269 3270 #ifdef ENABLE_SCO_OVER_HCI 3271 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3272 static void sco_schedule_tx(hci_connection_t * conn); 3273 3274 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3275 log_debug("SCO TX Timeout"); 3276 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3277 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3278 if (!conn) return; 3279 3280 // trigger send 3281 conn->sco_tx_ready = 1; 3282 // extra packet if CVSD but SCO buffer is too short 3283 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3284 conn->sco_tx_ready++; 3285 } 3286 hci_notify_if_sco_can_send_now(); 3287 } 3288 3289 3290 #define SCO_TX_AFTER_RX_MS (6) 3291 3292 static void sco_schedule_tx(hci_connection_t * conn){ 3293 3294 uint32_t now = btstack_run_loop_get_time_ms(); 3295 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3296 int time_delta_ms = sco_tx_ms - now; 3297 3298 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3299 3300 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3301 btstack_run_loop_remove_timer(timer); 3302 btstack_run_loop_set_timer(timer, time_delta_ms); 3303 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3304 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3305 btstack_run_loop_add_timer(timer); 3306 } 3307 #endif 3308 3309 static void sco_handler(uint8_t * packet, uint16_t size){ 3310 // lookup connection struct 3311 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3312 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3313 if (!conn) return; 3314 3315 #ifdef ENABLE_SCO_OVER_HCI 3316 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3317 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3318 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3319 packet[2] = 0x3c; 3320 memmove(&packet[3], &packet[23], 63); 3321 size = 63; 3322 } 3323 } 3324 3325 if (hci_have_usb_transport()){ 3326 // Nothing to do 3327 } else { 3328 // 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); 3329 if (hci_stack->synchronous_flow_control_enabled == 0){ 3330 uint32_t now = btstack_run_loop_get_time_ms(); 3331 3332 if (!conn->sco_rx_valid){ 3333 // ignore first 10 packets 3334 conn->sco_rx_count++; 3335 // log_debug("sco rx count %u", conn->sco_rx_count); 3336 if (conn->sco_rx_count == 10) { 3337 // use first timestamp as is and pretent it just started 3338 conn->sco_rx_ms = now; 3339 conn->sco_rx_valid = 1; 3340 conn->sco_rx_count = 0; 3341 sco_schedule_tx(conn); 3342 } 3343 } else { 3344 // track expected arrival timme 3345 conn->sco_rx_count++; 3346 conn->sco_rx_ms += 7; 3347 int delta = (int32_t) (now - conn->sco_rx_ms); 3348 if (delta > 0){ 3349 conn->sco_rx_ms++; 3350 } 3351 // log_debug("sco rx %u", conn->sco_rx_ms); 3352 sco_schedule_tx(conn); 3353 } 3354 } 3355 } 3356 #endif 3357 3358 // deliver to app 3359 if (hci_stack->sco_packet_handler) { 3360 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3361 } 3362 3363 #ifdef HAVE_SCO_TRANSPORT 3364 // We can send one packet for each received packet 3365 conn->sco_tx_ready++; 3366 hci_notify_if_sco_can_send_now(); 3367 #endif 3368 3369 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3370 conn->num_packets_completed++; 3371 hci_stack->host_completed_packets = 1; 3372 hci_run(); 3373 #endif 3374 } 3375 #endif 3376 3377 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3378 hci_dump_packet(packet_type, 1, packet, size); 3379 switch (packet_type) { 3380 case HCI_EVENT_PACKET: 3381 event_handler(packet, size); 3382 break; 3383 case HCI_ACL_DATA_PACKET: 3384 acl_handler(packet, size); 3385 break; 3386 #ifdef ENABLE_CLASSIC 3387 case HCI_SCO_DATA_PACKET: 3388 sco_handler(packet, size); 3389 break; 3390 #endif 3391 default: 3392 break; 3393 } 3394 } 3395 3396 /** 3397 * @brief Add event packet handler. 3398 */ 3399 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3400 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3401 } 3402 3403 3404 /** Register HCI packet handlers */ 3405 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3406 hci_stack->acl_packet_handler = handler; 3407 } 3408 3409 #ifdef ENABLE_CLASSIC 3410 /** 3411 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3412 */ 3413 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3414 hci_stack->sco_packet_handler = handler; 3415 } 3416 #endif 3417 3418 static void hci_state_reset(void){ 3419 // no connections yet 3420 hci_stack->connections = NULL; 3421 3422 // keep discoverable/connectable as this has been requested by the client(s) 3423 // hci_stack->discoverable = 0; 3424 // hci_stack->connectable = 0; 3425 // hci_stack->bondable = 1; 3426 // hci_stack->own_addr_type = 0; 3427 3428 // buffer is free 3429 hci_stack->hci_packet_buffer_reserved = false; 3430 3431 // no pending cmds 3432 hci_stack->decline_reason = 0; 3433 hci_stack->new_scan_enable_value = 0xff; 3434 3435 hci_stack->secure_connections_active = false; 3436 3437 #ifdef ENABLE_CLASSIC 3438 hci_stack->new_page_scan_interval = 0xffff; 3439 hci_stack->new_page_scan_window = 0xffff; 3440 hci_stack->new_page_scan_type = 0xff; 3441 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3442 hci_stack->gap_tasks = 3443 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3444 GAP_TASK_SET_CLASS_OF_DEVICE | 3445 GAP_TASK_SET_LOCAL_NAME | 3446 GAP_TASK_SET_EIR_DATA; 3447 #endif 3448 3449 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3450 hci_stack->classic_read_local_oob_data = true; 3451 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3452 #endif 3453 3454 // LE 3455 #ifdef ENABLE_BLE 3456 memset(hci_stack->le_random_address, 0, 6); 3457 hci_stack->le_random_address_set = 0; 3458 #endif 3459 #ifdef ENABLE_LE_CENTRAL 3460 hci_stack->le_scanning_active = false; 3461 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3462 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3463 hci_stack->le_whitelist_capacity = 0; 3464 #endif 3465 #ifdef ENABLE_LE_PERIPHERAL 3466 hci_stack->le_advertisements_active = false; 3467 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3468 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3469 } 3470 if (hci_stack->le_advertisements_data != NULL){ 3471 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3472 } 3473 #endif 3474 } 3475 3476 #ifdef ENABLE_CLASSIC 3477 /** 3478 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3479 */ 3480 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3481 // store and open remote device db 3482 hci_stack->link_key_db = link_key_db; 3483 if (hci_stack->link_key_db) { 3484 hci_stack->link_key_db->open(); 3485 } 3486 } 3487 #endif 3488 3489 void hci_init(const hci_transport_t *transport, const void *config){ 3490 3491 #ifdef HAVE_MALLOC 3492 if (!hci_stack) { 3493 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3494 } 3495 #else 3496 hci_stack = &hci_stack_static; 3497 #endif 3498 memset(hci_stack, 0, sizeof(hci_stack_t)); 3499 3500 // reference to use transport layer implementation 3501 hci_stack->hci_transport = transport; 3502 3503 // reference to used config 3504 hci_stack->config = config; 3505 3506 // setup pointer for outgoing packet buffer 3507 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3508 3509 // max acl payload size defined in config.h 3510 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3511 3512 // register packet handlers with transport 3513 transport->register_packet_handler(&packet_handler); 3514 3515 hci_stack->state = HCI_STATE_OFF; 3516 3517 // class of device 3518 hci_stack->class_of_device = 0x007a020c; // Smartphone 3519 3520 // bondable by default 3521 hci_stack->bondable = 1; 3522 3523 #ifdef ENABLE_CLASSIC 3524 // classic name 3525 hci_stack->local_name = default_classic_name; 3526 3527 // Master slave policy 3528 hci_stack->master_slave_policy = 1; 3529 3530 // Allow Role Switch 3531 hci_stack->allow_role_switch = 1; 3532 3533 // Default / minimum security level = 2 3534 hci_stack->gap_security_level = LEVEL_2; 3535 3536 // Default Security Mode 4 3537 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3538 3539 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3540 hci_stack->gap_required_encyrption_key_size = 7; 3541 3542 // Link Supervision Timeout 3543 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3544 3545 #endif 3546 3547 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3548 hci_stack->ssp_enable = 1; 3549 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3550 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3551 hci_stack->ssp_auto_accept = 1; 3552 3553 // Secure Connections: enable (requires support from Controller) 3554 hci_stack->secure_connections_enable = true; 3555 3556 // voice setting - signed 16 bit pcm data with CVSD over the air 3557 hci_stack->sco_voice_setting = 0x60; 3558 3559 #ifdef ENABLE_LE_CENTRAL 3560 // connection parameter to use for outgoing connections 3561 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3562 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3563 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3564 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3565 hci_stack->le_connection_latency = 4; // 4 3566 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3567 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3568 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3569 3570 // default LE Scanning 3571 hci_stack->le_scan_type = 0x1; // active 3572 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3573 hci_stack->le_scan_window = 0x30; // 30 ms 3574 #endif 3575 3576 #ifdef ENABLE_LE_PERIPHERAL 3577 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3578 #endif 3579 3580 // connection parameter range used to answer connection parameter update requests in l2cap 3581 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3582 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3583 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3584 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3585 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3586 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3587 3588 hci_state_reset(); 3589 } 3590 3591 void hci_deinit(void){ 3592 #ifdef HAVE_MALLOC 3593 if (hci_stack) { 3594 free(hci_stack); 3595 } 3596 #endif 3597 hci_stack = NULL; 3598 3599 #ifdef ENABLE_CLASSIC 3600 disable_l2cap_timeouts = 0; 3601 #endif 3602 } 3603 3604 /** 3605 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3606 */ 3607 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3608 hci_stack->chipset = chipset_driver; 3609 3610 // reset chipset driver - init is also called on power_up 3611 if (hci_stack->chipset && hci_stack->chipset->init){ 3612 hci_stack->chipset->init(hci_stack->config); 3613 } 3614 } 3615 3616 /** 3617 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3618 */ 3619 void hci_set_control(const btstack_control_t *hardware_control){ 3620 // references to used control implementation 3621 hci_stack->control = hardware_control; 3622 // init with transport config 3623 hardware_control->init(hci_stack->config); 3624 } 3625 3626 void hci_close(void){ 3627 3628 #ifdef ENABLE_CLASSIC 3629 // close remote device db 3630 if (hci_stack->link_key_db) { 3631 hci_stack->link_key_db->close(); 3632 } 3633 #endif 3634 3635 btstack_linked_list_iterator_t lit; 3636 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3637 while (btstack_linked_list_iterator_has_next(&lit)){ 3638 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3639 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3640 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3641 hci_shutdown_connection(connection); 3642 } 3643 3644 hci_power_control(HCI_POWER_OFF); 3645 3646 #ifdef HAVE_MALLOC 3647 free(hci_stack); 3648 #endif 3649 hci_stack = NULL; 3650 } 3651 3652 #ifdef HAVE_SCO_TRANSPORT 3653 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3654 hci_stack->sco_transport = sco_transport; 3655 sco_transport->register_packet_handler(&packet_handler); 3656 } 3657 #endif 3658 3659 #ifdef ENABLE_CLASSIC 3660 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3661 // validate ranage and set 3662 if (encryption_key_size < 7) return; 3663 if (encryption_key_size > 16) return; 3664 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3665 } 3666 3667 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3668 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3669 hci_stack->gap_security_mode = security_mode; 3670 return ERROR_CODE_SUCCESS; 3671 } else { 3672 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3673 } 3674 } 3675 3676 gap_security_mode_t gap_get_security_mode(void){ 3677 return hci_stack->gap_security_mode; 3678 } 3679 3680 void gap_set_security_level(gap_security_level_t security_level){ 3681 hci_stack->gap_security_level = security_level; 3682 } 3683 3684 gap_security_level_t gap_get_security_level(void){ 3685 if (hci_stack->gap_secure_connections_only_mode){ 3686 return LEVEL_4; 3687 } 3688 return hci_stack->gap_security_level; 3689 } 3690 3691 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3692 hci_stack->gap_minimal_service_security_level = security_level; 3693 } 3694 3695 void gap_set_secure_connections_only_mode(bool enable){ 3696 hci_stack->gap_secure_connections_only_mode = enable; 3697 } 3698 3699 bool gap_get_secure_connections_only_mode(void){ 3700 return hci_stack->gap_secure_connections_only_mode; 3701 } 3702 #endif 3703 3704 #ifdef ENABLE_CLASSIC 3705 void gap_set_class_of_device(uint32_t class_of_device){ 3706 hci_stack->class_of_device = class_of_device; 3707 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3708 hci_run(); 3709 } 3710 3711 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3712 hci_stack->default_link_policy_settings = default_link_policy_settings; 3713 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3714 hci_run(); 3715 } 3716 3717 void gap_set_allow_role_switch(bool allow_role_switch){ 3718 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3719 } 3720 3721 uint8_t hci_get_allow_role_switch(void){ 3722 return hci_stack->allow_role_switch; 3723 } 3724 3725 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3726 hci_stack->link_supervision_timeout = link_supervision_timeout; 3727 } 3728 3729 void hci_disable_l2cap_timeout_check(void){ 3730 disable_l2cap_timeouts = 1; 3731 } 3732 #endif 3733 3734 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3735 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3736 void hci_set_bd_addr(bd_addr_t addr){ 3737 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3738 hci_stack->custom_bd_addr_set = 1; 3739 } 3740 #endif 3741 3742 // State-Module-Driver overview 3743 // state module low-level 3744 // HCI_STATE_OFF off close 3745 // HCI_STATE_INITIALIZING, on open 3746 // HCI_STATE_WORKING, on open 3747 // HCI_STATE_HALTING, on open 3748 // HCI_STATE_SLEEPING, off/sleep close 3749 // HCI_STATE_FALLING_ASLEEP on open 3750 3751 static int hci_power_control_on(void){ 3752 3753 // power on 3754 int err = 0; 3755 if (hci_stack->control && hci_stack->control->on){ 3756 err = (*hci_stack->control->on)(); 3757 } 3758 if (err){ 3759 log_error( "POWER_ON failed"); 3760 hci_emit_hci_open_failed(); 3761 return err; 3762 } 3763 3764 // int chipset driver 3765 if (hci_stack->chipset && hci_stack->chipset->init){ 3766 hci_stack->chipset->init(hci_stack->config); 3767 } 3768 3769 // init transport 3770 if (hci_stack->hci_transport->init){ 3771 hci_stack->hci_transport->init(hci_stack->config); 3772 } 3773 3774 // open transport 3775 err = hci_stack->hci_transport->open(); 3776 if (err){ 3777 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3778 if (hci_stack->control && hci_stack->control->off){ 3779 (*hci_stack->control->off)(); 3780 } 3781 hci_emit_hci_open_failed(); 3782 return err; 3783 } 3784 return 0; 3785 } 3786 3787 static void hci_power_control_off(void){ 3788 3789 log_info("hci_power_control_off"); 3790 3791 // close low-level device 3792 hci_stack->hci_transport->close(); 3793 3794 log_info("hci_power_control_off - hci_transport closed"); 3795 3796 // power off 3797 if (hci_stack->control && hci_stack->control->off){ 3798 (*hci_stack->control->off)(); 3799 } 3800 3801 log_info("hci_power_control_off - control closed"); 3802 3803 hci_stack->state = HCI_STATE_OFF; 3804 } 3805 3806 static void hci_power_control_sleep(void){ 3807 3808 log_info("hci_power_control_sleep"); 3809 3810 #if 0 3811 // don't close serial port during sleep 3812 3813 // close low-level device 3814 hci_stack->hci_transport->close(hci_stack->config); 3815 #endif 3816 3817 // sleep mode 3818 if (hci_stack->control && hci_stack->control->sleep){ 3819 (*hci_stack->control->sleep)(); 3820 } 3821 3822 hci_stack->state = HCI_STATE_SLEEPING; 3823 } 3824 3825 static int hci_power_control_wake(void){ 3826 3827 log_info("hci_power_control_wake"); 3828 3829 // wake on 3830 if (hci_stack->control && hci_stack->control->wake){ 3831 (*hci_stack->control->wake)(); 3832 } 3833 3834 #if 0 3835 // open low-level device 3836 int err = hci_stack->hci_transport->open(hci_stack->config); 3837 if (err){ 3838 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3839 if (hci_stack->control && hci_stack->control->off){ 3840 (*hci_stack->control->off)(); 3841 } 3842 hci_emit_hci_open_failed(); 3843 return err; 3844 } 3845 #endif 3846 3847 return 0; 3848 } 3849 3850 static void hci_power_transition_to_initializing(void){ 3851 // set up state machine 3852 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3853 hci_stack->hci_packet_buffer_reserved = false; 3854 hci_stack->state = HCI_STATE_INITIALIZING; 3855 hci_stack->substate = HCI_INIT_SEND_RESET; 3856 } 3857 3858 // returns error 3859 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3860 int err; 3861 switch (power_mode){ 3862 case HCI_POWER_ON: 3863 err = hci_power_control_on(); 3864 if (err != 0) { 3865 log_error("hci_power_control_on() error %d", err); 3866 return err; 3867 } 3868 hci_power_transition_to_initializing(); 3869 break; 3870 case HCI_POWER_OFF: 3871 // do nothing 3872 break; 3873 case HCI_POWER_SLEEP: 3874 // do nothing (with SLEEP == OFF) 3875 break; 3876 default: 3877 btstack_assert(false); 3878 break; 3879 } 3880 return ERROR_CODE_SUCCESS; 3881 } 3882 3883 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3884 switch (power_mode){ 3885 case HCI_POWER_ON: 3886 // do nothing 3887 break; 3888 case HCI_POWER_OFF: 3889 // no connections yet, just turn it off 3890 hci_power_control_off(); 3891 break; 3892 case HCI_POWER_SLEEP: 3893 // no connections yet, just turn it off 3894 hci_power_control_sleep(); 3895 break; 3896 default: 3897 btstack_assert(false); 3898 break; 3899 } 3900 return ERROR_CODE_SUCCESS; 3901 } 3902 3903 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3904 switch (power_mode){ 3905 case HCI_POWER_ON: 3906 // do nothing 3907 break; 3908 case HCI_POWER_OFF: 3909 // see hci_run 3910 hci_stack->state = HCI_STATE_HALTING; 3911 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3912 break; 3913 case HCI_POWER_SLEEP: 3914 // see hci_run 3915 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3916 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3917 break; 3918 default: 3919 btstack_assert(false); 3920 break; 3921 } 3922 return ERROR_CODE_SUCCESS; 3923 } 3924 3925 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3926 switch (power_mode){ 3927 case HCI_POWER_ON: 3928 hci_power_transition_to_initializing(); 3929 break; 3930 case HCI_POWER_OFF: 3931 // do nothing 3932 break; 3933 case HCI_POWER_SLEEP: 3934 // see hci_run 3935 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3936 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3937 break; 3938 default: 3939 btstack_assert(false); 3940 break; 3941 } 3942 return ERROR_CODE_SUCCESS; 3943 } 3944 3945 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3946 switch (power_mode){ 3947 case HCI_POWER_ON: 3948 3949 #ifdef HAVE_PLATFORM_IPHONE_OS 3950 // nothing to do, if H4 supports power management 3951 if (btstack_control_iphone_power_management_enabled()){ 3952 hci_stack->state = HCI_STATE_INITIALIZING; 3953 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3954 break; 3955 } 3956 #endif 3957 hci_power_transition_to_initializing(); 3958 break; 3959 case HCI_POWER_OFF: 3960 // see hci_run 3961 hci_stack->state = HCI_STATE_HALTING; 3962 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3963 break; 3964 case HCI_POWER_SLEEP: 3965 // do nothing 3966 break; 3967 default: 3968 btstack_assert(false); 3969 break; 3970 } 3971 return ERROR_CODE_SUCCESS; 3972 } 3973 3974 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3975 int err; 3976 switch (power_mode){ 3977 case HCI_POWER_ON: 3978 #ifdef HAVE_PLATFORM_IPHONE_OS 3979 // nothing to do, if H4 supports power management 3980 if (btstack_control_iphone_power_management_enabled()){ 3981 hci_stack->state = HCI_STATE_INITIALIZING; 3982 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3983 hci_update_scan_enable(); 3984 break; 3985 } 3986 #endif 3987 err = hci_power_control_wake(); 3988 if (err) return err; 3989 hci_power_transition_to_initializing(); 3990 break; 3991 case HCI_POWER_OFF: 3992 hci_stack->state = HCI_STATE_HALTING; 3993 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3994 break; 3995 case HCI_POWER_SLEEP: 3996 // do nothing 3997 break; 3998 default: 3999 btstack_assert(false); 4000 break; 4001 } 4002 return ERROR_CODE_SUCCESS; 4003 } 4004 4005 int hci_power_control(HCI_POWER_MODE power_mode){ 4006 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4007 int err = 0; 4008 switch (hci_stack->state){ 4009 case HCI_STATE_OFF: 4010 err = hci_power_control_state_off(power_mode); 4011 break; 4012 case HCI_STATE_INITIALIZING: 4013 err = hci_power_control_state_initializing(power_mode); 4014 break; 4015 case HCI_STATE_WORKING: 4016 err = hci_power_control_state_working(power_mode); 4017 break; 4018 case HCI_STATE_HALTING: 4019 err = hci_power_control_state_halting(power_mode); 4020 break; 4021 case HCI_STATE_FALLING_ASLEEP: 4022 err = hci_power_control_state_falling_asleep(power_mode); 4023 break; 4024 case HCI_STATE_SLEEPING: 4025 err = hci_power_control_state_sleeping(power_mode); 4026 break; 4027 default: 4028 btstack_assert(false); 4029 break; 4030 } 4031 if (err != 0){ 4032 return err; 4033 } 4034 4035 // create internal event 4036 hci_emit_state(); 4037 4038 // trigger next/first action 4039 hci_run(); 4040 4041 return 0; 4042 } 4043 4044 4045 #ifdef ENABLE_CLASSIC 4046 4047 static void hci_update_scan_enable(void){ 4048 // 2 = page scan, 1 = inq scan 4049 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4050 hci_run(); 4051 } 4052 4053 void gap_discoverable_control(uint8_t enable){ 4054 if (enable) enable = 1; // normalize argument 4055 4056 if (hci_stack->discoverable == enable){ 4057 hci_emit_discoverable_enabled(hci_stack->discoverable); 4058 return; 4059 } 4060 4061 hci_stack->discoverable = enable; 4062 hci_update_scan_enable(); 4063 } 4064 4065 void gap_connectable_control(uint8_t enable){ 4066 if (enable) enable = 1; // normalize argument 4067 4068 // don't emit event 4069 if (hci_stack->connectable == enable) return; 4070 4071 hci_stack->connectable = enable; 4072 hci_update_scan_enable(); 4073 } 4074 #endif 4075 4076 void gap_local_bd_addr(bd_addr_t address_buffer){ 4077 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4078 } 4079 4080 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4081 static void hci_host_num_completed_packets(void){ 4082 4083 // create packet manually as arrays are not supported and num_commands should not get reduced 4084 hci_reserve_packet_buffer(); 4085 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4086 4087 uint16_t size = 0; 4088 uint16_t num_handles = 0; 4089 packet[size++] = 0x35; 4090 packet[size++] = 0x0c; 4091 size++; // skip param len 4092 size++; // skip num handles 4093 4094 // add { handle, packets } entries 4095 btstack_linked_item_t * it; 4096 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4097 hci_connection_t * connection = (hci_connection_t *) it; 4098 if (connection->num_packets_completed){ 4099 little_endian_store_16(packet, size, connection->con_handle); 4100 size += 2; 4101 little_endian_store_16(packet, size, connection->num_packets_completed); 4102 size += 2; 4103 // 4104 num_handles++; 4105 connection->num_packets_completed = 0; 4106 } 4107 } 4108 4109 packet[2] = size - 3; 4110 packet[3] = num_handles; 4111 4112 hci_stack->host_completed_packets = 0; 4113 4114 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4115 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4116 4117 // release packet buffer for synchronous transport implementations 4118 if (hci_transport_synchronous()){ 4119 hci_release_packet_buffer(); 4120 hci_emit_transport_packet_sent(); 4121 } 4122 } 4123 #endif 4124 4125 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4126 UNUSED(ds); 4127 hci_stack->substate = HCI_HALTING_CLOSE; 4128 // allow packet handlers to defer final shutdown 4129 hci_emit_state(); 4130 hci_run(); 4131 } 4132 4133 static bool hci_run_acl_fragments(void){ 4134 if (hci_stack->acl_fragmentation_total_size > 0u) { 4135 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4136 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4137 if (connection) { 4138 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4139 hci_send_acl_packet_fragments(connection); 4140 return true; 4141 } 4142 } else { 4143 // connection gone -> discard further fragments 4144 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4145 hci_stack->acl_fragmentation_total_size = 0; 4146 hci_stack->acl_fragmentation_pos = 0; 4147 } 4148 } 4149 return false; 4150 } 4151 4152 #ifdef ENABLE_CLASSIC 4153 static bool hci_run_general_gap_classic(void){ 4154 4155 // assert stack is working and classic is active 4156 if (hci_classic_supported() == false) return false; 4157 if (hci_stack->state != HCI_STATE_WORKING) return false; 4158 4159 // decline incoming connections 4160 if (hci_stack->decline_reason){ 4161 uint8_t reason = hci_stack->decline_reason; 4162 hci_stack->decline_reason = 0; 4163 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4164 return true; 4165 } 4166 4167 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4168 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4169 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4170 return true; 4171 } 4172 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4173 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4174 gap_run_set_local_name(); 4175 return true; 4176 } 4177 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4178 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4179 gap_run_set_eir_data(); 4180 return true; 4181 } 4182 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4183 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4184 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4185 return true; 4186 } 4187 // write page scan activity 4188 if (hci_stack->new_page_scan_interval != 0xffff) { 4189 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4190 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4191 hci_stack->new_page_scan_interval = 0xffff; 4192 hci_stack->new_page_scan_window = 0xffff; 4193 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4194 return true; 4195 } 4196 // write page scan type 4197 if (hci_stack->new_page_scan_type != 0xff) { 4198 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4199 hci_stack->new_page_scan_type = 0xff; 4200 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4201 return true; 4202 } 4203 // send scan enable 4204 if (hci_stack->new_scan_enable_value != 0xff) { 4205 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4206 hci_stack->new_scan_enable_value = 0xff; 4207 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4208 return true; 4209 } 4210 4211 // start/stop inquiry 4212 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4213 uint8_t duration = hci_stack->inquiry_state; 4214 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4215 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4216 return true; 4217 } 4218 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4219 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4220 hci_send_cmd(&hci_inquiry_cancel); 4221 return true; 4222 } 4223 // remote name request 4224 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4225 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4226 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4227 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4228 return true; 4229 } 4230 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4231 // Local OOB data 4232 if (hci_stack->classic_read_local_oob_data){ 4233 hci_stack->classic_read_local_oob_data = false; 4234 if (hci_stack->local_supported_commands[1] & 0x10u){ 4235 hci_send_cmd(&hci_read_local_extended_oob_data); 4236 } else { 4237 hci_send_cmd(&hci_read_local_oob_data); 4238 } 4239 } 4240 #endif 4241 // pairing 4242 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4243 uint8_t state = hci_stack->gap_pairing_state; 4244 uint8_t pin_code[16]; 4245 switch (state){ 4246 case GAP_PAIRING_STATE_SEND_PIN: 4247 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4248 memset(pin_code, 0, 16); 4249 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4250 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4251 break; 4252 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4253 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4254 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4255 break; 4256 case GAP_PAIRING_STATE_SEND_PASSKEY: 4257 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4258 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4259 break; 4260 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4261 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4262 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4263 break; 4264 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4265 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4266 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4267 break; 4268 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4269 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4270 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4271 break; 4272 default: 4273 break; 4274 } 4275 return true; 4276 } 4277 return false; 4278 } 4279 #endif 4280 4281 #ifdef ENABLE_BLE 4282 static bool hci_run_general_gap_le(void){ 4283 4284 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4285 4286 if (hci_stack->state != HCI_STATE_WORKING) return false; 4287 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4288 4289 4290 // Phase 1: collect what to stop 4291 4292 bool scanning_stop = false; 4293 bool connecting_stop = false; 4294 bool advertising_stop = false; 4295 4296 #ifndef ENABLE_LE_CENTRAL 4297 UNUSED(scanning_stop); 4298 UNUSED(connecting_stop); 4299 #endif 4300 #ifndef ENABLE_LE_PERIPHERAL 4301 UNUSED(advertising_stop); 4302 #endif 4303 4304 // check if whitelist needs modification 4305 bool whitelist_modification_pending = false; 4306 btstack_linked_list_iterator_t lit; 4307 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4308 while (btstack_linked_list_iterator_has_next(&lit)){ 4309 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4310 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4311 whitelist_modification_pending = true; 4312 break; 4313 } 4314 } 4315 // check if resolving list needs modification 4316 bool resolving_list_modification_pending = false; 4317 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4318 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4319 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4320 resolving_list_modification_pending = true; 4321 } 4322 #endif 4323 4324 #ifdef ENABLE_LE_CENTRAL 4325 // scanning control 4326 if (hci_stack->le_scanning_active) { 4327 // stop if: 4328 // - parameter change required 4329 // - it's disabled 4330 // - whitelist change required but used for scanning 4331 // - resolving list modified 4332 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4333 if ((hci_stack->le_scanning_param_update) || 4334 !hci_stack->le_scanning_enabled || 4335 scanning_uses_whitelist || 4336 resolving_list_modification_pending){ 4337 4338 scanning_stop = true; 4339 } 4340 } 4341 #endif 4342 4343 #ifdef ENABLE_LE_CENTRAL 4344 // connecting control 4345 bool connecting_with_whitelist; 4346 switch (hci_stack->le_connecting_state){ 4347 case LE_CONNECTING_DIRECT: 4348 case LE_CONNECTING_WHITELIST: 4349 // stop connecting if: 4350 // - connecting uses white and whitelist modification pending 4351 // - if it got disabled 4352 // - resolving list modified 4353 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4354 if ((connecting_with_whitelist && whitelist_modification_pending) || 4355 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4356 resolving_list_modification_pending) { 4357 4358 connecting_stop = true; 4359 } 4360 break; 4361 default: 4362 break; 4363 } 4364 #endif 4365 4366 #ifdef ENABLE_LE_PERIPHERAL 4367 // le advertisement control 4368 if (hci_stack->le_advertisements_active){ 4369 // stop if: 4370 // - parameter change required 4371 // - it's disabled 4372 // - whitelist change required but used for advertisement filter policy 4373 // - resolving list modified 4374 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4375 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4376 if (advertising_change || 4377 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4378 (advertising_uses_whitelist & whitelist_modification_pending) || 4379 resolving_list_modification_pending) { 4380 4381 advertising_stop = true; 4382 } 4383 } 4384 #endif 4385 4386 4387 // Phase 2: stop everything that should be off during modifications 4388 4389 #ifdef ENABLE_LE_CENTRAL 4390 if (scanning_stop){ 4391 hci_stack->le_scanning_active = false; 4392 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4393 return true; 4394 } 4395 #endif 4396 4397 #ifdef ENABLE_LE_CENTRAL 4398 if (connecting_stop){ 4399 hci_send_cmd(&hci_le_create_connection_cancel); 4400 return true; 4401 } 4402 #endif 4403 4404 #ifdef ENABLE_LE_PERIPHERAL 4405 if (advertising_stop){ 4406 hci_stack->le_advertisements_active = false; 4407 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4408 return true; 4409 } 4410 #endif 4411 4412 // Phase 3: modify 4413 4414 #ifdef ENABLE_LE_CENTRAL 4415 if (hci_stack->le_scanning_param_update){ 4416 hci_stack->le_scanning_param_update = false; 4417 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4418 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4419 return true; 4420 } 4421 #endif 4422 4423 #ifdef ENABLE_LE_PERIPHERAL 4424 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4425 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4426 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4427 hci_send_cmd(&hci_le_set_advertising_parameters, 4428 hci_stack->le_advertisements_interval_min, 4429 hci_stack->le_advertisements_interval_max, 4430 hci_stack->le_advertisements_type, 4431 hci_stack->le_advertisements_own_addr_type, 4432 hci_stack->le_advertisements_direct_address_type, 4433 hci_stack->le_advertisements_direct_address, 4434 hci_stack->le_advertisements_channel_map, 4435 hci_stack->le_advertisements_filter_policy); 4436 return true; 4437 } 4438 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4439 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4440 uint8_t adv_data_clean[31]; 4441 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4442 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4443 hci_stack->le_advertisements_data_len); 4444 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4445 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4446 return true; 4447 } 4448 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4449 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4450 uint8_t scan_data_clean[31]; 4451 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4452 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4453 hci_stack->le_scan_response_data_len); 4454 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4455 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4456 return true; 4457 } 4458 #endif 4459 4460 4461 #ifdef ENABLE_LE_CENTRAL 4462 // if connect with whitelist was active and is not cancelled yet, wait until next time 4463 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4464 #endif 4465 4466 // LE Whitelist Management 4467 if (whitelist_modification_pending){ 4468 // add/remove entries 4469 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4470 while (btstack_linked_list_iterator_has_next(&lit)){ 4471 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4472 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4473 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4474 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4475 return true; 4476 } 4477 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4478 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4479 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4480 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4481 return true; 4482 } 4483 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4484 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4485 btstack_memory_whitelist_entry_free(entry); 4486 } 4487 } 4488 } 4489 4490 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4491 // LE Resolving List Management 4492 if (resolving_list_supported) { 4493 uint16_t i; 4494 switch (hci_stack->le_resolving_list_state) { 4495 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4496 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4497 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4498 return true; 4499 case LE_RESOLVING_LIST_READ_SIZE: 4500 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4501 hci_send_cmd(&hci_le_read_resolving_list_size); 4502 return true; 4503 case LE_RESOLVING_LIST_SEND_CLEAR: 4504 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4505 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4506 sizeof(hci_stack->le_resolving_list_add_entries)); 4507 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4508 sizeof(hci_stack->le_resolving_list_remove_entries)); 4509 hci_send_cmd(&hci_le_clear_resolving_list); 4510 return true; 4511 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4512 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4513 uint8_t offset = i >> 3; 4514 uint8_t mask = 1 << (i & 7); 4515 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4516 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4517 bd_addr_t peer_identity_addreses; 4518 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4519 sm_key_t peer_irk; 4520 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4521 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4522 4523 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4524 // trigger whitelist entry 'update' (work around for controller bug) 4525 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4526 while (btstack_linked_list_iterator_has_next(&lit)) { 4527 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4528 if (entry->address_type != peer_identity_addr_type) continue; 4529 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4530 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4531 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4532 } 4533 #endif 4534 4535 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4536 peer_identity_addreses); 4537 return true; 4538 } 4539 4540 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4541 4542 /* fall through */ 4543 4544 case LE_RESOLVING_LIST_ADD_ENTRIES: 4545 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4546 uint8_t offset = i >> 3; 4547 uint8_t mask = 1 << (i & 7); 4548 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4549 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4550 bd_addr_t peer_identity_addreses; 4551 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4552 sm_key_t peer_irk; 4553 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4554 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4555 const uint8_t *local_irk = gap_get_persistent_irk(); 4556 // command uses format specifier 'P' that stores 16-byte value without flip 4557 uint8_t local_irk_flipped[16]; 4558 uint8_t peer_irk_flipped[16]; 4559 reverse_128(local_irk, local_irk_flipped); 4560 reverse_128(peer_irk, peer_irk_flipped); 4561 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4562 peer_irk_flipped, local_irk_flipped); 4563 return true; 4564 } 4565 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4566 break; 4567 4568 default: 4569 break; 4570 } 4571 } 4572 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4573 #endif 4574 4575 // Phase 4: restore state 4576 4577 #ifdef ENABLE_LE_CENTRAL 4578 // re-start scanning 4579 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4580 hci_stack->le_scanning_active = true; 4581 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4582 return true; 4583 } 4584 #endif 4585 4586 #ifdef ENABLE_LE_CENTRAL 4587 // re-start connecting 4588 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4589 bd_addr_t null_addr; 4590 memset(null_addr, 0, 6); 4591 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4592 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4593 hci_send_cmd(&hci_le_create_connection, 4594 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4595 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4596 1, // use whitelist 4597 0, // peer address type 4598 null_addr, // peer bd addr 4599 hci_stack->le_connection_own_addr_type, // our addr type: 4600 hci_stack->le_connection_interval_min, // conn interval min 4601 hci_stack->le_connection_interval_max, // conn interval max 4602 hci_stack->le_connection_latency, // conn latency 4603 hci_stack->le_supervision_timeout, // conn latency 4604 hci_stack->le_minimum_ce_length, // min ce length 4605 hci_stack->le_maximum_ce_length // max ce length 4606 ); 4607 return true; 4608 } 4609 #endif 4610 4611 #ifdef ENABLE_LE_PERIPHERAL 4612 // re-start advertising 4613 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4614 // check if advertisements should be enabled given 4615 hci_stack->le_advertisements_active = true; 4616 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4617 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4618 return true; 4619 } 4620 #endif 4621 4622 return false; 4623 } 4624 #endif 4625 4626 static bool hci_run_general_pending_commands(void){ 4627 btstack_linked_item_t * it; 4628 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4629 hci_connection_t * connection = (hci_connection_t *) it; 4630 4631 switch(connection->state){ 4632 case SEND_CREATE_CONNECTION: 4633 switch(connection->address_type){ 4634 #ifdef ENABLE_CLASSIC 4635 case BD_ADDR_TYPE_ACL: 4636 log_info("sending hci_create_connection"); 4637 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4638 break; 4639 #endif 4640 default: 4641 #ifdef ENABLE_BLE 4642 #ifdef ENABLE_LE_CENTRAL 4643 log_info("sending hci_le_create_connection"); 4644 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4645 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4646 hci_send_cmd(&hci_le_create_connection, 4647 hci_stack->le_connection_scan_interval, // conn scan interval 4648 hci_stack->le_connection_scan_window, // conn scan windows 4649 0, // don't use whitelist 4650 connection->address_type, // peer address type 4651 connection->address, // peer bd addr 4652 hci_stack->le_connection_own_addr_type, // our addr type: 4653 hci_stack->le_connection_interval_min, // conn interval min 4654 hci_stack->le_connection_interval_max, // conn interval max 4655 hci_stack->le_connection_latency, // conn latency 4656 hci_stack->le_supervision_timeout, // conn latency 4657 hci_stack->le_minimum_ce_length, // min ce length 4658 hci_stack->le_maximum_ce_length // max ce length 4659 ); 4660 connection->state = SENT_CREATE_CONNECTION; 4661 #endif 4662 #endif 4663 break; 4664 } 4665 return true; 4666 4667 #ifdef ENABLE_CLASSIC 4668 case RECEIVED_CONNECTION_REQUEST: 4669 connection->role = HCI_ROLE_SLAVE; 4670 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4671 log_info("sending hci_accept_connection_request"); 4672 connection->state = ACCEPTED_CONNECTION_REQUEST; 4673 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4674 } 4675 return true; 4676 #endif 4677 4678 #ifdef ENABLE_BLE 4679 #ifdef ENABLE_LE_CENTRAL 4680 case SEND_CANCEL_CONNECTION: 4681 connection->state = SENT_CANCEL_CONNECTION; 4682 hci_send_cmd(&hci_le_create_connection_cancel); 4683 return true; 4684 #endif 4685 #endif 4686 case SEND_DISCONNECT: 4687 connection->state = SENT_DISCONNECT; 4688 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4689 return true; 4690 4691 default: 4692 break; 4693 } 4694 4695 // no further commands if connection is about to get shut down 4696 if (connection->state == SENT_DISCONNECT) continue; 4697 4698 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4699 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4700 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4701 return true; 4702 } 4703 4704 #ifdef ENABLE_CLASSIC 4705 4706 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4707 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4708 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4709 return true; 4710 } 4711 4712 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4713 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4714 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4715 return true; 4716 } 4717 4718 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4719 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4720 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4721 return true; 4722 } 4723 4724 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4725 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4726 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4727 return true; 4728 } 4729 4730 // Handling link key request requires remote supported features 4731 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4732 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4733 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4734 4735 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4736 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4737 if (have_link_key && security_level_sufficient){ 4738 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4739 } else { 4740 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4741 } 4742 return true; 4743 } 4744 4745 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4746 log_info("denying to pin request"); 4747 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4748 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4749 return true; 4750 } 4751 4752 // security assessment requires remote features 4753 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4754 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4755 hci_ssp_assess_security_on_io_cap_request(connection); 4756 // 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 4757 } 4758 4759 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4760 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4761 // set authentication requirements: 4762 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4763 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4764 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4765 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4766 authreq |= 1; 4767 } 4768 bool bonding = hci_stack->bondable; 4769 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4770 // if we have received IO Cap Response, we're in responder role 4771 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4772 if (bonding && !remote_bonding){ 4773 log_info("Remote not bonding, dropping local flag"); 4774 bonding = false; 4775 } 4776 } 4777 if (bonding){ 4778 if (connection->bonding_flags & BONDING_DEDICATED){ 4779 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4780 } else { 4781 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4782 } 4783 } 4784 uint8_t have_oob_data = 0; 4785 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4786 if (connection->classic_oob_c_192 != NULL){ 4787 have_oob_data |= 1; 4788 } 4789 if (connection->classic_oob_c_256 != NULL){ 4790 have_oob_data |= 2; 4791 } 4792 #endif 4793 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4794 return true; 4795 } 4796 4797 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4798 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4799 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4800 return true; 4801 } 4802 4803 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4804 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4805 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4806 const uint8_t zero[16] = { 0 }; 4807 const uint8_t * r_192 = zero; 4808 const uint8_t * c_192 = zero; 4809 const uint8_t * r_256 = zero; 4810 const uint8_t * c_256 = zero; 4811 // verify P-256 OOB 4812 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4813 c_256 = connection->classic_oob_c_256; 4814 if (connection->classic_oob_r_256 != NULL) { 4815 r_256 = connection->classic_oob_r_256; 4816 } 4817 } 4818 // verify P-192 OOB 4819 if ((connection->classic_oob_c_192 != NULL)) { 4820 c_192 = connection->classic_oob_c_192; 4821 if (connection->classic_oob_r_192 != NULL) { 4822 r_192 = connection->classic_oob_r_192; 4823 } 4824 } 4825 4826 // assess security 4827 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4828 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4829 if (need_level_4 && !can_reach_level_4){ 4830 log_info("Level 4 required, but not possible -> abort"); 4831 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4832 // send oob negative reply 4833 c_256 = NULL; 4834 c_192 = NULL; 4835 } 4836 4837 // Reply 4838 if (c_256 != zero) { 4839 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4840 } else if (c_192 != zero){ 4841 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4842 } else { 4843 hci_stack->classic_oob_con_handle = connection->con_handle; 4844 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4845 } 4846 return true; 4847 } 4848 #endif 4849 4850 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4851 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4852 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4853 return true; 4854 } 4855 4856 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4857 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4858 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4859 return true; 4860 } 4861 4862 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4863 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4864 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4865 return true; 4866 } 4867 4868 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4869 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4870 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4871 connection->state = SENT_DISCONNECT; 4872 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4873 return true; 4874 } 4875 4876 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4877 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4878 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4879 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4880 return true; 4881 } 4882 4883 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4884 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4885 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4886 return true; 4887 } 4888 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4889 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4890 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4891 return true; 4892 } 4893 #endif 4894 4895 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4896 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4897 #ifdef ENABLE_CLASSIC 4898 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4899 #endif 4900 if (connection->state != SENT_DISCONNECT){ 4901 connection->state = SENT_DISCONNECT; 4902 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4903 return true; 4904 } 4905 } 4906 4907 #ifdef ENABLE_CLASSIC 4908 uint16_t sniff_min_interval; 4909 switch (connection->sniff_min_interval){ 4910 case 0: 4911 break; 4912 case 0xffff: 4913 connection->sniff_min_interval = 0; 4914 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4915 return true; 4916 default: 4917 sniff_min_interval = connection->sniff_min_interval; 4918 connection->sniff_min_interval = 0; 4919 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4920 return true; 4921 } 4922 4923 if (connection->sniff_subrating_max_latency != 0xffff){ 4924 uint16_t max_latency = connection->sniff_subrating_max_latency; 4925 connection->sniff_subrating_max_latency = 0; 4926 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4927 return true; 4928 } 4929 4930 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4931 uint8_t service_type = (uint8_t) connection->qos_service_type; 4932 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4933 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); 4934 return true; 4935 } 4936 4937 if (connection->request_role != HCI_ROLE_INVALID){ 4938 hci_role_t role = connection->request_role; 4939 connection->request_role = HCI_ROLE_INVALID; 4940 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4941 return true; 4942 } 4943 #endif 4944 4945 #ifdef ENABLE_BLE 4946 switch (connection->le_con_parameter_update_state){ 4947 // response to L2CAP CON PARAMETER UPDATE REQUEST 4948 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4949 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4950 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4951 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4952 0x0000, 0xffff); 4953 return true; 4954 case CON_PARAMETER_UPDATE_REPLY: 4955 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4956 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4957 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4958 0x0000, 0xffff); 4959 return true; 4960 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4961 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4962 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4963 return true; 4964 default: 4965 break; 4966 } 4967 if (connection->le_phy_update_all_phys != 0xffu){ 4968 uint8_t all_phys = connection->le_phy_update_all_phys; 4969 connection->le_phy_update_all_phys = 0xff; 4970 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); 4971 return true; 4972 } 4973 #endif 4974 } 4975 return false; 4976 } 4977 4978 static void hci_run(void){ 4979 4980 bool done; 4981 4982 // send continuation fragments first, as they block the prepared packet buffer 4983 done = hci_run_acl_fragments(); 4984 if (done) return; 4985 4986 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4987 // send host num completed packets next as they don't require num_cmd_packets > 0 4988 if (!hci_can_send_comand_packet_transport()) return; 4989 if (hci_stack->host_completed_packets){ 4990 hci_host_num_completed_packets(); 4991 return; 4992 } 4993 #endif 4994 4995 if (!hci_can_send_command_packet_now()) return; 4996 4997 // global/non-connection oriented commands 4998 4999 5000 #ifdef ENABLE_CLASSIC 5001 // general gap classic 5002 done = hci_run_general_gap_classic(); 5003 if (done) return; 5004 #endif 5005 5006 #ifdef ENABLE_BLE 5007 // general gap le 5008 done = hci_run_general_gap_le(); 5009 if (done) return; 5010 #endif 5011 5012 // send pending HCI commands 5013 done = hci_run_general_pending_commands(); 5014 if (done) return; 5015 5016 // stack state sub statemachines 5017 hci_connection_t * connection; 5018 switch (hci_stack->state){ 5019 case HCI_STATE_INITIALIZING: 5020 hci_initializing_run(); 5021 break; 5022 5023 case HCI_STATE_HALTING: 5024 5025 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5026 switch (hci_stack->substate){ 5027 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5028 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5029 5030 #ifdef ENABLE_BLE 5031 #ifdef ENABLE_LE_CENTRAL 5032 // free whitelist entries 5033 { 5034 btstack_linked_list_iterator_t lit; 5035 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5036 while (btstack_linked_list_iterator_has_next(&lit)){ 5037 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5038 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5039 btstack_memory_whitelist_entry_free(entry); 5040 } 5041 } 5042 #endif 5043 #endif 5044 // close all open connections 5045 connection = (hci_connection_t *) hci_stack->connections; 5046 if (connection){ 5047 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5048 if (!hci_can_send_command_packet_now()) return; 5049 5050 // check state 5051 if (connection->state == SENT_DISCONNECT) return; 5052 connection->state = SENT_DISCONNECT; 5053 5054 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5055 5056 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5057 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5058 5059 // ... which would be ignored anyway as we shutdown (free) the connection now 5060 hci_shutdown_connection(connection); 5061 5062 // finally, send the disconnect command 5063 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5064 return; 5065 } 5066 5067 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5068 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5069 log_info("HCI_STATE_HALTING: wait 50 ms"); 5070 hci_stack->substate = HCI_HALTING_W4_TIMER; 5071 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5072 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5073 btstack_run_loop_add_timer(&hci_stack->timeout); 5074 break; 5075 } 5076 5077 /* fall through */ 5078 5079 case HCI_HALTING_CLOSE: 5080 log_info("HCI_STATE_HALTING, calling off"); 5081 5082 // switch mode 5083 hci_power_control_off(); 5084 5085 log_info("HCI_STATE_HALTING, emitting state"); 5086 hci_emit_state(); 5087 log_info("HCI_STATE_HALTING, done"); 5088 break; 5089 5090 case HCI_HALTING_W4_TIMER: 5091 // keep waiting 5092 5093 break; 5094 default: 5095 break; 5096 } 5097 5098 break; 5099 5100 case HCI_STATE_FALLING_ASLEEP: 5101 switch(hci_stack->substate) { 5102 case HCI_FALLING_ASLEEP_DISCONNECT: 5103 log_info("HCI_STATE_FALLING_ASLEEP"); 5104 // close all open connections 5105 connection = (hci_connection_t *) hci_stack->connections; 5106 5107 #ifdef HAVE_PLATFORM_IPHONE_OS 5108 // don't close connections, if H4 supports power management 5109 if (btstack_control_iphone_power_management_enabled()){ 5110 connection = NULL; 5111 } 5112 #endif 5113 if (connection){ 5114 5115 // send disconnect 5116 if (!hci_can_send_command_packet_now()) return; 5117 5118 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5119 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5120 5121 // send disconnected event right away - causes higher layer connections to get closed, too. 5122 hci_shutdown_connection(connection); 5123 return; 5124 } 5125 5126 if (hci_classic_supported()){ 5127 // disable page and inquiry scan 5128 if (!hci_can_send_command_packet_now()) return; 5129 5130 log_info("HCI_STATE_HALTING, disabling inq scans"); 5131 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5132 5133 // continue in next sub state 5134 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5135 break; 5136 } 5137 5138 /* fall through */ 5139 5140 case HCI_FALLING_ASLEEP_COMPLETE: 5141 log_info("HCI_STATE_HALTING, calling sleep"); 5142 #ifdef HAVE_PLATFORM_IPHONE_OS 5143 // don't actually go to sleep, if H4 supports power management 5144 if (btstack_control_iphone_power_management_enabled()){ 5145 // SLEEP MODE reached 5146 hci_stack->state = HCI_STATE_SLEEPING; 5147 hci_emit_state(); 5148 break; 5149 } 5150 #endif 5151 // switch mode 5152 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5153 hci_emit_state(); 5154 break; 5155 5156 default: 5157 break; 5158 } 5159 break; 5160 5161 default: 5162 break; 5163 } 5164 } 5165 5166 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5167 // house-keeping 5168 5169 #ifdef ENABLE_CLASSIC 5170 bd_addr_t addr; 5171 hci_connection_t * conn; 5172 #endif 5173 #ifdef ENABLE_LE_CENTRAL 5174 uint8_t initiator_filter_policy; 5175 #endif 5176 5177 uint16_t opcode = little_endian_read_16(packet, 0); 5178 switch (opcode) { 5179 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5180 hci_stack->loopback_mode = packet[3]; 5181 break; 5182 5183 #ifdef ENABLE_CLASSIC 5184 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5185 reverse_bd_addr(&packet[3], addr); 5186 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5187 5188 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5189 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5190 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5191 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5192 } 5193 5194 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5195 if (!conn) { 5196 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5197 if (!conn) { 5198 // notify client that alloc failed 5199 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5200 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5201 } 5202 conn->state = SEND_CREATE_CONNECTION; 5203 conn->role = HCI_ROLE_MASTER; 5204 } 5205 5206 conn->con_handle = HCI_CON_HANDLE_INVALID; 5207 conn->role = HCI_ROLE_INVALID; 5208 5209 log_info("conn state %u", conn->state); 5210 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5211 switch (conn->state) { 5212 // if connection active exists 5213 case OPEN: 5214 // and OPEN, emit connection complete command 5215 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5216 // packet not sent to controller 5217 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5218 case RECEIVED_DISCONNECTION_COMPLETE: 5219 // create connection triggered in disconnect complete event, let's do it now 5220 break; 5221 case SEND_CREATE_CONNECTION: 5222 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5223 break; 5224 default: 5225 // otherwise, just ignore as it is already in the open process 5226 // packet not sent to controller 5227 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5228 } 5229 conn->state = SENT_CREATE_CONNECTION; 5230 5231 // track outgoing connection 5232 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5233 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5234 break; 5235 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5236 if (hci_stack->link_key_db) { 5237 reverse_bd_addr(&packet[3], addr); 5238 hci_stack->link_key_db->delete_link_key(addr); 5239 } 5240 break; 5241 5242 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5243 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5244 // setup_synchronous_connection? Voice setting at offset 22 5245 // TODO: compare to current setting if sco connection already active 5246 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5247 break; 5248 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5249 // accept_synchronus_connection? Voice setting at offset 18 5250 // TODO: compare to current setting if sco connection already active 5251 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5252 break; 5253 #endif 5254 #endif 5255 5256 #ifdef ENABLE_BLE 5257 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5258 hci_stack->le_random_address_set = 1; 5259 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5260 break; 5261 #ifdef ENABLE_LE_PERIPHERAL 5262 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5263 hci_stack->le_advertisements_active = packet[3] != 0; 5264 break; 5265 #endif 5266 #ifdef ENABLE_LE_CENTRAL 5267 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5268 // white list used? 5269 initiator_filter_policy = packet[7]; 5270 switch (initiator_filter_policy) { 5271 case 0: 5272 // whitelist not used 5273 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5274 break; 5275 case 1: 5276 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5277 break; 5278 default: 5279 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5280 break; 5281 } 5282 // track outgoing connection 5283 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5284 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5285 break; 5286 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5287 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5288 break; 5289 #endif 5290 #endif 5291 default: 5292 break; 5293 } 5294 5295 hci_stack->num_cmd_packets--; 5296 5297 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5298 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5299 if (err != 0){ 5300 return ERROR_CODE_HARDWARE_FAILURE; 5301 } 5302 return ERROR_CODE_SUCCESS; 5303 } 5304 5305 // disconnect because of security block 5306 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5307 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5308 if (!connection) return; 5309 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5310 } 5311 5312 5313 // Configure Secure Simple Pairing 5314 5315 #ifdef ENABLE_CLASSIC 5316 5317 // enable will enable SSP during init 5318 void gap_ssp_set_enable(int enable){ 5319 hci_stack->ssp_enable = enable; 5320 } 5321 5322 static int hci_local_ssp_activated(void){ 5323 return gap_ssp_supported() && hci_stack->ssp_enable; 5324 } 5325 5326 // if set, BTstack will respond to io capability request using authentication requirement 5327 void gap_ssp_set_io_capability(int io_capability){ 5328 hci_stack->ssp_io_capability = io_capability; 5329 } 5330 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5331 hci_stack->ssp_authentication_requirement = authentication_requirement; 5332 } 5333 5334 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5335 void gap_ssp_set_auto_accept(int auto_accept){ 5336 hci_stack->ssp_auto_accept = auto_accept; 5337 } 5338 5339 void gap_secure_connections_enable(bool enable){ 5340 hci_stack->secure_connections_enable = enable; 5341 } 5342 5343 #endif 5344 5345 // va_list part of hci_send_cmd 5346 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5347 if (!hci_can_send_command_packet_now()){ 5348 log_error("hci_send_cmd called but cannot send packet now"); 5349 return ERROR_CODE_COMMAND_DISALLOWED; 5350 } 5351 5352 // for HCI INITIALIZATION 5353 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5354 hci_stack->last_cmd_opcode = cmd->opcode; 5355 5356 hci_reserve_packet_buffer(); 5357 uint8_t * packet = hci_stack->hci_packet_buffer; 5358 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5359 uint8_t status = hci_send_cmd_packet(packet, size); 5360 5361 // release packet buffer on error or for synchronous transport implementations 5362 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5363 hci_release_packet_buffer(); 5364 hci_emit_transport_packet_sent(); 5365 } 5366 5367 return status; 5368 } 5369 5370 /** 5371 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5372 */ 5373 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5374 va_list argptr; 5375 va_start(argptr, cmd); 5376 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5377 va_end(argptr); 5378 return status; 5379 } 5380 5381 // Create various non-HCI events. 5382 // TODO: generalize, use table similar to hci_create_command 5383 5384 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5385 // dump packet 5386 if (dump) { 5387 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5388 } 5389 5390 // dispatch to all event handlers 5391 btstack_linked_list_iterator_t it; 5392 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5393 while (btstack_linked_list_iterator_has_next(&it)){ 5394 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5395 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5396 } 5397 } 5398 5399 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5400 if (!hci_stack->acl_packet_handler) return; 5401 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5402 } 5403 5404 #ifdef ENABLE_CLASSIC 5405 static void hci_notify_if_sco_can_send_now(void){ 5406 // notify SCO sender if waiting 5407 if (!hci_stack->sco_waiting_for_can_send_now) return; 5408 if (hci_can_send_sco_packet_now()){ 5409 hci_stack->sco_waiting_for_can_send_now = 0; 5410 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5411 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5412 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5413 } 5414 } 5415 5416 // parsing end emitting has been merged to reduce code size 5417 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5418 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5419 5420 uint8_t * eir_data; 5421 ad_context_t context; 5422 const uint8_t * name; 5423 uint8_t name_len; 5424 5425 if (size < 3) return; 5426 5427 int event_type = hci_event_packet_get_type(packet); 5428 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5429 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5430 5431 switch (event_type){ 5432 case HCI_EVENT_INQUIRY_RESULT: 5433 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5434 if (size != (3 + (num_responses * 14))) return; 5435 break; 5436 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5437 if (size != 257) return; 5438 if (num_responses != 1) return; 5439 break; 5440 default: 5441 return; 5442 } 5443 5444 // event[1] is set at the end 5445 int i; 5446 for (i=0; i<num_responses;i++){ 5447 memset(event, 0, sizeof(event)); 5448 event[0] = GAP_EVENT_INQUIRY_RESULT; 5449 uint8_t event_size = 27; // if name is not set by EIR 5450 5451 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5452 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5453 (void)memcpy(&event[9], 5454 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5455 3); // class of device 5456 (void)memcpy(&event[12], 5457 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5458 2); // clock offset 5459 5460 switch (event_type){ 5461 case HCI_EVENT_INQUIRY_RESULT: 5462 // 14,15,16,17 = 0, size 18 5463 break; 5464 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5465 event[14] = 1; 5466 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5467 // 16,17 = 0, size 18 5468 break; 5469 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5470 event[14] = 1; 5471 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5472 // EIR packets only contain a single inquiry response 5473 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5474 name = NULL; 5475 // Iterate over EIR data 5476 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5477 uint8_t data_type = ad_iterator_get_data_type(&context); 5478 uint8_t data_size = ad_iterator_get_data_len(&context); 5479 const uint8_t * data = ad_iterator_get_data(&context); 5480 // Prefer Complete Local Name over Shortened Local Name 5481 switch (data_type){ 5482 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5483 if (name) continue; 5484 /* fall through */ 5485 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5486 name = data; 5487 name_len = data_size; 5488 break; 5489 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5490 if (data_size != 8) break; 5491 event[16] = 1; 5492 memcpy(&event[17], data, 8); 5493 break; 5494 default: 5495 break; 5496 } 5497 } 5498 if (name){ 5499 event[25] = 1; 5500 // truncate name if needed 5501 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5502 event[26] = len; 5503 (void)memcpy(&event[27], name, len); 5504 event_size += len; 5505 } 5506 break; 5507 default: 5508 return; 5509 } 5510 event[1] = event_size - 2; 5511 hci_emit_event(event, event_size, 1); 5512 } 5513 } 5514 #endif 5515 5516 void hci_emit_state(void){ 5517 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5518 uint8_t event[3]; 5519 event[0] = BTSTACK_EVENT_STATE; 5520 event[1] = sizeof(event) - 2u; 5521 event[2] = hci_stack->state; 5522 hci_emit_event(event, sizeof(event), 1); 5523 } 5524 5525 #ifdef ENABLE_CLASSIC 5526 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5527 uint8_t event[13]; 5528 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5529 event[1] = sizeof(event) - 2; 5530 event[2] = status; 5531 little_endian_store_16(event, 3, con_handle); 5532 reverse_bd_addr(address, &event[5]); 5533 event[11] = 1; // ACL connection 5534 event[12] = 0; // encryption disabled 5535 hci_emit_event(event, sizeof(event), 1); 5536 } 5537 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5538 if (disable_l2cap_timeouts) return; 5539 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5540 uint8_t event[4]; 5541 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5542 event[1] = sizeof(event) - 2; 5543 little_endian_store_16(event, 2, conn->con_handle); 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 #endif 5547 5548 #ifdef ENABLE_BLE 5549 #ifdef ENABLE_LE_CENTRAL 5550 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){ 5551 uint8_t event[21]; 5552 event[0] = HCI_EVENT_LE_META; 5553 event[1] = sizeof(event) - 2u; 5554 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5555 event[3] = status; 5556 little_endian_store_16(event, 4, con_handle); 5557 event[6] = 0; // TODO: role 5558 event[7] = address_type; 5559 reverse_bd_addr(address, &event[8]); 5560 little_endian_store_16(event, 14, 0); // interval 5561 little_endian_store_16(event, 16, 0); // latency 5562 little_endian_store_16(event, 18, 0); // supervision timeout 5563 event[20] = 0; // master clock accuracy 5564 hci_emit_event(event, sizeof(event), 1); 5565 } 5566 #endif 5567 #endif 5568 5569 static void hci_emit_transport_packet_sent(void){ 5570 // notify upper stack that it might be possible to send again 5571 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5572 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5573 } 5574 5575 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5576 uint8_t event[6]; 5577 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5578 event[1] = sizeof(event) - 2u; 5579 event[2] = 0; // status = OK 5580 little_endian_store_16(event, 3, con_handle); 5581 event[5] = reason; 5582 hci_emit_event(event, sizeof(event), 1); 5583 } 5584 5585 static void hci_emit_nr_connections_changed(void){ 5586 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5587 uint8_t event[3]; 5588 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5589 event[1] = sizeof(event) - 2u; 5590 event[2] = nr_hci_connections(); 5591 hci_emit_event(event, sizeof(event), 1); 5592 } 5593 5594 static void hci_emit_hci_open_failed(void){ 5595 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5596 uint8_t event[2]; 5597 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5598 event[1] = sizeof(event) - 2u; 5599 hci_emit_event(event, sizeof(event), 1); 5600 } 5601 5602 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5603 log_info("hci_emit_dedicated_bonding_result %u ", status); 5604 uint8_t event[9]; 5605 int pos = 0; 5606 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5607 event[pos++] = sizeof(event) - 2u; 5608 event[pos++] = status; 5609 reverse_bd_addr(address, &event[pos]); 5610 hci_emit_event(event, sizeof(event), 1); 5611 } 5612 5613 5614 #ifdef ENABLE_CLASSIC 5615 5616 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5617 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5618 uint8_t event[5]; 5619 int pos = 0; 5620 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5621 event[pos++] = sizeof(event) - 2; 5622 little_endian_store_16(event, 2, con_handle); 5623 pos += 2; 5624 event[pos++] = level; 5625 hci_emit_event(event, sizeof(event), 1); 5626 } 5627 5628 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5629 if (!connection) return LEVEL_0; 5630 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5631 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5632 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5633 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5634 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5635 // LEVEL 4 always requires 128 bit encrytion key size 5636 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5637 security_level = LEVEL_3; 5638 } 5639 return security_level; 5640 } 5641 5642 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5643 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5644 uint8_t event[3]; 5645 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5646 event[1] = sizeof(event) - 2; 5647 event[2] = enabled; 5648 hci_emit_event(event, sizeof(event), 1); 5649 } 5650 5651 // query if remote side supports eSCO 5652 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5653 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5654 if (!connection) return false; 5655 return (connection->remote_supported_features[0] & 1) != 0; 5656 } 5657 5658 static bool hci_ssp_supported(hci_connection_t * connection){ 5659 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5660 return (connection->bonding_flags & mask) == mask; 5661 } 5662 5663 // query if remote side supports SSP 5664 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5665 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5666 if (!connection) return false; 5667 return hci_ssp_supported(connection) ? 1 : 0; 5668 } 5669 5670 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5671 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5672 } 5673 5674 // GAP API 5675 /** 5676 * @bbrief enable/disable bonding. default is enabled 5677 * @praram enabled 5678 */ 5679 void gap_set_bondable_mode(int enable){ 5680 hci_stack->bondable = enable ? 1 : 0; 5681 } 5682 /** 5683 * @brief Get bondable mode. 5684 * @return 1 if bondable 5685 */ 5686 int gap_get_bondable_mode(void){ 5687 return hci_stack->bondable; 5688 } 5689 5690 /** 5691 * @brief map link keys to security levels 5692 */ 5693 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5694 switch (link_key_type){ 5695 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5696 return LEVEL_4; 5697 case COMBINATION_KEY: 5698 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5699 return LEVEL_3; 5700 default: 5701 return LEVEL_2; 5702 } 5703 } 5704 5705 /** 5706 * @brief map link keys to secure connection yes/no 5707 */ 5708 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5709 switch (link_key_type){ 5710 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5711 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5712 return 1; 5713 default: 5714 return 0; 5715 } 5716 } 5717 5718 /** 5719 * @brief map link keys to authenticated 5720 */ 5721 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5722 switch (link_key_type){ 5723 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5724 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5725 return 1; 5726 default: 5727 return 0; 5728 } 5729 } 5730 5731 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5732 log_info("gap_mitm_protection_required_for_security_level %u", level); 5733 return level > LEVEL_2; 5734 } 5735 5736 /** 5737 * @brief get current security level 5738 */ 5739 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5740 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5741 if (!connection) return LEVEL_0; 5742 return gap_security_level_for_connection(connection); 5743 } 5744 5745 /** 5746 * @brief request connection to device to 5747 * @result GAP_AUTHENTICATION_RESULT 5748 */ 5749 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5750 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5751 if (!connection){ 5752 hci_emit_security_level(con_handle, LEVEL_0); 5753 return; 5754 } 5755 5756 btstack_assert(hci_is_le_connection(connection) == false); 5757 5758 // 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) 5759 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5760 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5761 requested_level = LEVEL_4; 5762 } 5763 5764 gap_security_level_t current_level = gap_security_level(con_handle); 5765 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5766 requested_level, connection->requested_security_level, current_level); 5767 5768 // authentication active if authentication request was sent or planned level > 0 5769 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5770 if (authentication_active){ 5771 // authentication already active 5772 if (connection->requested_security_level < requested_level){ 5773 // increase requested level as new level is higher 5774 // TODO: handle re-authentication when done 5775 connection->requested_security_level = requested_level; 5776 } 5777 } else { 5778 // no request active, notify if security sufficient 5779 if (requested_level <= current_level){ 5780 hci_emit_security_level(con_handle, current_level); 5781 return; 5782 } 5783 5784 // store request 5785 connection->requested_security_level = requested_level; 5786 5787 // start to authenticate connection 5788 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5789 hci_run(); 5790 } 5791 } 5792 5793 /** 5794 * @brief start dedicated bonding with device. disconnect after bonding 5795 * @param device 5796 * @param request MITM protection 5797 * @result GAP_DEDICATED_BONDING_COMPLETE 5798 */ 5799 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5800 5801 // create connection state machine 5802 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5803 5804 if (!connection){ 5805 return BTSTACK_MEMORY_ALLOC_FAILED; 5806 } 5807 5808 // delete linkn key 5809 gap_drop_link_key_for_bd_addr(device); 5810 5811 // configure LEVEL_2/3, dedicated bonding 5812 connection->state = SEND_CREATE_CONNECTION; 5813 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5814 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5815 connection->bonding_flags = BONDING_DEDICATED; 5816 5817 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5818 5819 // handle: connnection failure (connection complete != ok) 5820 // handle: authentication failure 5821 // handle: disconnect on done 5822 5823 hci_run(); 5824 5825 return 0; 5826 } 5827 5828 void gap_set_local_name(const char * local_name){ 5829 hci_stack->local_name = local_name; 5830 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5831 // also update EIR if not set by user 5832 if (hci_stack->eir_data == NULL){ 5833 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5834 } 5835 hci_run(); 5836 } 5837 #endif 5838 5839 5840 #ifdef ENABLE_BLE 5841 5842 #ifdef ENABLE_LE_CENTRAL 5843 void gap_start_scan(void){ 5844 hci_stack->le_scanning_enabled = true; 5845 hci_run(); 5846 } 5847 5848 void gap_stop_scan(void){ 5849 hci_stack->le_scanning_enabled = false; 5850 hci_run(); 5851 } 5852 5853 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5854 hci_stack->le_scan_type = scan_type; 5855 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5856 hci_stack->le_scan_interval = scan_interval; 5857 hci_stack->le_scan_window = scan_window; 5858 hci_stack->le_scanning_param_update = true; 5859 hci_run(); 5860 } 5861 5862 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5863 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5864 } 5865 5866 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5867 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5868 if (!conn){ 5869 // disallow if le connection is already outgoing 5870 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5871 log_error("le connection already active"); 5872 return ERROR_CODE_COMMAND_DISALLOWED; 5873 } 5874 5875 log_info("gap_connect: no connection exists yet, creating context"); 5876 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5877 if (!conn){ 5878 // notify client that alloc failed 5879 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5880 log_info("gap_connect: failed to alloc hci_connection_t"); 5881 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5882 } 5883 5884 // set le connecting state 5885 if (hci_is_le_connection_type(addr_type)){ 5886 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5887 } 5888 5889 conn->state = SEND_CREATE_CONNECTION; 5890 log_info("gap_connect: send create connection next"); 5891 hci_run(); 5892 return ERROR_CODE_SUCCESS; 5893 } 5894 5895 if (!hci_is_le_connection(conn) || 5896 (conn->state == SEND_CREATE_CONNECTION) || 5897 (conn->state == SENT_CREATE_CONNECTION)) { 5898 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5899 log_error("gap_connect: classic connection or connect is already being created"); 5900 return GATT_CLIENT_IN_WRONG_STATE; 5901 } 5902 5903 // check if connection was just disconnected 5904 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5905 log_info("gap_connect: send create connection (again)"); 5906 conn->state = SEND_CREATE_CONNECTION; 5907 hci_run(); 5908 return ERROR_CODE_SUCCESS; 5909 } 5910 5911 log_info("gap_connect: context exists with state %u", conn->state); 5912 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5913 hci_run(); 5914 return ERROR_CODE_SUCCESS; 5915 } 5916 5917 // @assumption: only a single outgoing LE Connection exists 5918 static hci_connection_t * gap_get_outgoing_connection(void){ 5919 btstack_linked_item_t *it; 5920 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5921 hci_connection_t * conn = (hci_connection_t *) it; 5922 if (!hci_is_le_connection(conn)) continue; 5923 switch (conn->state){ 5924 case SEND_CREATE_CONNECTION: 5925 case SENT_CREATE_CONNECTION: 5926 case SENT_CANCEL_CONNECTION: 5927 return conn; 5928 default: 5929 break; 5930 }; 5931 } 5932 return NULL; 5933 } 5934 5935 uint8_t gap_connect_cancel(void){ 5936 hci_connection_t * conn = gap_get_outgoing_connection(); 5937 if (!conn) return 0; 5938 switch (conn->state){ 5939 case SEND_CREATE_CONNECTION: 5940 // skip sending create connection and emit event instead 5941 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5942 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5943 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5944 btstack_memory_hci_connection_free( conn ); 5945 break; 5946 case SENT_CREATE_CONNECTION: 5947 // request to send cancel connection 5948 conn->state = SEND_CANCEL_CONNECTION; 5949 hci_run(); 5950 break; 5951 default: 5952 break; 5953 } 5954 return 0; 5955 } 5956 #endif 5957 5958 #ifdef ENABLE_LE_CENTRAL 5959 /** 5960 * @brief Set connection parameters for outgoing connections 5961 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5962 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5963 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5964 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5965 * @param conn_latency, default: 4 5966 * @param supervision_timeout (unit: 10ms), default: 720 ms 5967 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5968 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5969 */ 5970 5971 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5972 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5973 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5974 hci_stack->le_connection_scan_interval = conn_scan_interval; 5975 hci_stack->le_connection_scan_window = conn_scan_window; 5976 hci_stack->le_connection_interval_min = conn_interval_min; 5977 hci_stack->le_connection_interval_max = conn_interval_max; 5978 hci_stack->le_connection_latency = conn_latency; 5979 hci_stack->le_supervision_timeout = supervision_timeout; 5980 hci_stack->le_minimum_ce_length = min_ce_length; 5981 hci_stack->le_maximum_ce_length = max_ce_length; 5982 } 5983 #endif 5984 5985 /** 5986 * @brief Updates the connection parameters for a given LE connection 5987 * @param handle 5988 * @param conn_interval_min (unit: 1.25ms) 5989 * @param conn_interval_max (unit: 1.25ms) 5990 * @param conn_latency 5991 * @param supervision_timeout (unit: 10ms) 5992 * @returns 0 if ok 5993 */ 5994 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5995 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5996 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5997 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5998 connection->le_conn_interval_min = conn_interval_min; 5999 connection->le_conn_interval_max = conn_interval_max; 6000 connection->le_conn_latency = conn_latency; 6001 connection->le_supervision_timeout = supervision_timeout; 6002 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6003 hci_run(); 6004 return 0; 6005 } 6006 6007 /** 6008 * @brief Request an update of the connection parameter for a given LE connection 6009 * @param handle 6010 * @param conn_interval_min (unit: 1.25ms) 6011 * @param conn_interval_max (unit: 1.25ms) 6012 * @param conn_latency 6013 * @param supervision_timeout (unit: 10ms) 6014 * @returns 0 if ok 6015 */ 6016 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6017 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6018 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6019 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6020 connection->le_conn_interval_min = conn_interval_min; 6021 connection->le_conn_interval_max = conn_interval_max; 6022 connection->le_conn_latency = conn_latency; 6023 connection->le_supervision_timeout = supervision_timeout; 6024 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6025 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6026 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6027 return 0; 6028 } 6029 6030 #ifdef ENABLE_LE_PERIPHERAL 6031 6032 /** 6033 * @brief Set Advertisement Data 6034 * @param advertising_data_length 6035 * @param advertising_data (max 31 octets) 6036 * @note data is not copied, pointer has to stay valid 6037 */ 6038 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6039 hci_stack->le_advertisements_data_len = advertising_data_length; 6040 hci_stack->le_advertisements_data = advertising_data; 6041 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6042 hci_run(); 6043 } 6044 6045 /** 6046 * @brief Set Scan Response Data 6047 * @param advertising_data_length 6048 * @param advertising_data (max 31 octets) 6049 * @note data is not copied, pointer has to stay valid 6050 */ 6051 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6052 hci_stack->le_scan_response_data_len = scan_response_data_length; 6053 hci_stack->le_scan_response_data = scan_response_data; 6054 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6055 hci_run(); 6056 } 6057 6058 /** 6059 * @brief Set Advertisement Parameters 6060 * @param adv_int_min 6061 * @param adv_int_max 6062 * @param adv_type 6063 * @param direct_address_type 6064 * @param direct_address 6065 * @param channel_map 6066 * @param filter_policy 6067 * 6068 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6069 */ 6070 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6071 uint8_t direct_address_typ, bd_addr_t direct_address, 6072 uint8_t channel_map, uint8_t filter_policy) { 6073 6074 hci_stack->le_advertisements_interval_min = adv_int_min; 6075 hci_stack->le_advertisements_interval_max = adv_int_max; 6076 hci_stack->le_advertisements_type = adv_type; 6077 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6078 hci_stack->le_advertisements_channel_map = channel_map; 6079 hci_stack->le_advertisements_filter_policy = filter_policy; 6080 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6081 6); 6082 6083 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6084 hci_run(); 6085 } 6086 6087 /** 6088 * @brief Enable/Disable Advertisements 6089 * @param enabled 6090 */ 6091 void gap_advertisements_enable(int enabled){ 6092 hci_stack->le_advertisements_enabled = enabled != 0; 6093 hci_update_advertisements_enabled_for_current_roles(); 6094 hci_run(); 6095 } 6096 6097 #endif 6098 6099 void hci_le_set_own_address_type(uint8_t own_address_type){ 6100 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6101 if (own_address_type == hci_stack->le_own_addr_type) return; 6102 hci_stack->le_own_addr_type = own_address_type; 6103 6104 #ifdef ENABLE_LE_PERIPHERAL 6105 // update advertisement parameters, too 6106 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6107 hci_run(); 6108 #endif 6109 #ifdef ENABLE_LE_CENTRAL 6110 // note: we don't update scan parameters or modify ongoing connection attempts 6111 #endif 6112 } 6113 6114 #endif 6115 6116 uint8_t gap_disconnect(hci_con_handle_t handle){ 6117 hci_connection_t * conn = hci_connection_for_handle(handle); 6118 if (!conn){ 6119 hci_emit_disconnection_complete(handle, 0); 6120 return 0; 6121 } 6122 // ignore if already disconnected 6123 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6124 return 0; 6125 } 6126 conn->state = SEND_DISCONNECT; 6127 hci_run(); 6128 return 0; 6129 } 6130 6131 int gap_read_rssi(hci_con_handle_t con_handle){ 6132 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6133 if (hci_connection == NULL) return 0; 6134 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6135 hci_run(); 6136 return 1; 6137 } 6138 6139 /** 6140 * @brief Get connection type 6141 * @param con_handle 6142 * @result connection_type 6143 */ 6144 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6145 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6146 if (!conn) return GAP_CONNECTION_INVALID; 6147 switch (conn->address_type){ 6148 case BD_ADDR_TYPE_LE_PUBLIC: 6149 case BD_ADDR_TYPE_LE_RANDOM: 6150 return GAP_CONNECTION_LE; 6151 case BD_ADDR_TYPE_SCO: 6152 return GAP_CONNECTION_SCO; 6153 case BD_ADDR_TYPE_ACL: 6154 return GAP_CONNECTION_ACL; 6155 default: 6156 return GAP_CONNECTION_INVALID; 6157 } 6158 } 6159 6160 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6161 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6162 if (!conn) return HCI_ROLE_INVALID; 6163 return (hci_role_t) conn->role; 6164 } 6165 6166 6167 #ifdef ENABLE_CLASSIC 6168 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6169 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6170 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6171 conn->request_role = role; 6172 hci_run(); 6173 return ERROR_CODE_SUCCESS; 6174 } 6175 #endif 6176 6177 #ifdef ENABLE_BLE 6178 6179 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){ 6180 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6181 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6182 6183 conn->le_phy_update_all_phys = all_phys; 6184 conn->le_phy_update_tx_phys = tx_phys; 6185 conn->le_phy_update_rx_phys = rx_phys; 6186 conn->le_phy_update_phy_options = phy_options; 6187 6188 hci_run(); 6189 6190 return 0; 6191 } 6192 6193 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6194 // check if already in list 6195 btstack_linked_list_iterator_t it; 6196 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6197 while (btstack_linked_list_iterator_has_next(&it)) { 6198 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6199 if (entry->address_type != address_type) { 6200 continue; 6201 } 6202 if (memcmp(entry->address, address, 6) != 0) { 6203 continue; 6204 } 6205 // disallow if already scheduled to add 6206 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6207 return ERROR_CODE_COMMAND_DISALLOWED; 6208 } 6209 // still on controller, but scheduled to remove -> re-add 6210 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6211 return ERROR_CODE_SUCCESS; 6212 } 6213 // alloc and add to list 6214 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6215 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6216 entry->address_type = address_type; 6217 (void)memcpy(entry->address, address, 6); 6218 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6219 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6220 return ERROR_CODE_SUCCESS; 6221 } 6222 6223 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6224 btstack_linked_list_iterator_t it; 6225 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6226 while (btstack_linked_list_iterator_has_next(&it)){ 6227 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6228 if (entry->address_type != address_type) { 6229 continue; 6230 } 6231 if (memcmp(entry->address, address, 6) != 0) { 6232 continue; 6233 } 6234 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6235 // remove from controller if already present 6236 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6237 } else { 6238 // directly remove entry from whitelist 6239 btstack_linked_list_iterator_remove(&it); 6240 btstack_memory_whitelist_entry_free(entry); 6241 } 6242 return ERROR_CODE_SUCCESS; 6243 } 6244 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6245 } 6246 6247 static void hci_whitelist_clear(void){ 6248 btstack_linked_list_iterator_t it; 6249 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6250 while (btstack_linked_list_iterator_has_next(&it)){ 6251 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6252 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6253 // remove from controller if already present 6254 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6255 continue; 6256 } 6257 // directly remove entry from whitelist 6258 btstack_linked_list_iterator_remove(&it); 6259 btstack_memory_whitelist_entry_free(entry); 6260 } 6261 } 6262 6263 /** 6264 * @brief Clear Whitelist 6265 * @returns 0 if ok 6266 */ 6267 uint8_t gap_whitelist_clear(void){ 6268 hci_whitelist_clear(); 6269 hci_run(); 6270 return ERROR_CODE_SUCCESS; 6271 } 6272 6273 /** 6274 * @brief Add Device to Whitelist 6275 * @param address_typ 6276 * @param address 6277 * @returns 0 if ok 6278 */ 6279 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6280 uint8_t status = hci_whitelist_add(address_type, address); 6281 if (status){ 6282 return status; 6283 } 6284 hci_run(); 6285 return ERROR_CODE_SUCCESS; 6286 } 6287 6288 /** 6289 * @brief Remove Device from Whitelist 6290 * @param address_typ 6291 * @param address 6292 * @returns 0 if ok 6293 */ 6294 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6295 uint8_t status = hci_whitelist_remove(address_type, address); 6296 if (status){ 6297 return status; 6298 } 6299 hci_run(); 6300 return ERROR_CODE_SUCCESS; 6301 } 6302 6303 #ifdef ENABLE_LE_CENTRAL 6304 /** 6305 * @brief Connect with Whitelist 6306 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6307 * @returns - if ok 6308 */ 6309 uint8_t gap_connect_with_whitelist(void){ 6310 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6311 return ERROR_CODE_COMMAND_DISALLOWED; 6312 } 6313 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6314 hci_run(); 6315 return ERROR_CODE_SUCCESS; 6316 } 6317 6318 /** 6319 * @brief Auto Connection Establishment - Start Connecting to device 6320 * @param address_typ 6321 * @param address 6322 * @returns 0 if ok 6323 */ 6324 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6325 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6326 return ERROR_CODE_COMMAND_DISALLOWED; 6327 } 6328 6329 uint8_t status = hci_whitelist_add(address_type, address); 6330 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6331 return status; 6332 } 6333 6334 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6335 6336 hci_run(); 6337 return ERROR_CODE_SUCCESS; 6338 } 6339 6340 /** 6341 * @brief Auto Connection Establishment - Stop Connecting to device 6342 * @param address_typ 6343 * @param address 6344 * @returns 0 if ok 6345 */ 6346 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6347 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6348 return ERROR_CODE_COMMAND_DISALLOWED; 6349 } 6350 6351 hci_whitelist_remove(address_type, address); 6352 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6353 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6354 } 6355 hci_run(); 6356 return 0; 6357 } 6358 6359 /** 6360 * @brief Auto Connection Establishment - Stop everything 6361 * @note Convenience function to stop all active auto connection attempts 6362 */ 6363 uint8_t gap_auto_connection_stop_all(void){ 6364 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6365 return ERROR_CODE_COMMAND_DISALLOWED; 6366 } 6367 hci_whitelist_clear(); 6368 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6369 hci_run(); 6370 return ERROR_CODE_SUCCESS; 6371 } 6372 6373 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6374 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6375 if (!conn) return 0; 6376 return conn->le_connection_interval; 6377 } 6378 #endif 6379 #endif 6380 6381 #ifdef ENABLE_CLASSIC 6382 /** 6383 * @brief Set Extended Inquiry Response data 6384 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6385 * @note has to be done before stack starts up 6386 */ 6387 void gap_set_extended_inquiry_response(const uint8_t * data){ 6388 hci_stack->eir_data = data; 6389 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6390 hci_run(); 6391 } 6392 6393 /** 6394 * @brief Start GAP Classic Inquiry 6395 * @param duration in 1.28s units 6396 * @return 0 if ok 6397 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6398 */ 6399 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6400 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6401 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6402 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6403 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6404 } 6405 hci_stack->inquiry_state = duration_in_1280ms_units; 6406 hci_run(); 6407 return 0; 6408 } 6409 6410 /** 6411 * @brief Stop GAP Classic Inquiry 6412 * @returns 0 if ok 6413 */ 6414 int gap_inquiry_stop(void){ 6415 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6416 // emit inquiry complete event, before it even started 6417 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6418 hci_emit_event(event, sizeof(event), 1); 6419 return 0; 6420 } 6421 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6422 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6423 hci_run(); 6424 return 0; 6425 } 6426 6427 void gap_inquiry_set_lap(uint32_t lap){ 6428 hci_stack->inquiry_lap = lap; 6429 } 6430 6431 6432 /** 6433 * @brief Remote Name Request 6434 * @param addr 6435 * @param page_scan_repetition_mode 6436 * @param clock_offset only used when bit 15 is set 6437 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6438 */ 6439 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6440 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6441 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6442 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6443 hci_stack->remote_name_clock_offset = clock_offset; 6444 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6445 hci_run(); 6446 return 0; 6447 } 6448 6449 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6450 hci_stack->gap_pairing_state = state; 6451 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6452 hci_run(); 6453 return 0; 6454 } 6455 6456 /** 6457 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6458 * @param addr 6459 * @param pin_data 6460 * @param pin_len 6461 * @return 0 if ok 6462 */ 6463 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6464 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6465 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6466 hci_stack->gap_pairing_pin_len = pin_len; 6467 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6468 } 6469 6470 /** 6471 * @brief Legacy Pairing Pin Code Response 6472 * @param addr 6473 * @param pin 6474 * @return 0 if ok 6475 */ 6476 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6477 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6478 } 6479 6480 /** 6481 * @brief Abort Legacy Pairing 6482 * @param addr 6483 * @param pin 6484 * @return 0 if ok 6485 */ 6486 int gap_pin_code_negative(bd_addr_t addr){ 6487 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6488 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6489 } 6490 6491 /** 6492 * @brief SSP Passkey Response 6493 * @param addr 6494 * @param passkey 6495 * @return 0 if ok 6496 */ 6497 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6498 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6499 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6500 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6501 } 6502 6503 /** 6504 * @brief Abort SSP Passkey Entry/Pairing 6505 * @param addr 6506 * @param pin 6507 * @return 0 if ok 6508 */ 6509 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6510 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6511 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6512 } 6513 6514 /** 6515 * @brief Accept SSP Numeric Comparison 6516 * @param addr 6517 * @param passkey 6518 * @return 0 if ok 6519 */ 6520 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6521 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6522 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6523 } 6524 6525 /** 6526 * @brief Abort SSP Numeric Comparison/Pairing 6527 * @param addr 6528 * @param pin 6529 * @return 0 if ok 6530 */ 6531 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6532 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6533 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6534 } 6535 6536 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6537 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 6546 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6547 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6548 } 6549 6550 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6551 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6552 } 6553 #endif 6554 6555 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6556 /** 6557 * @brief Report Remote OOB Data 6558 * @param bd_addr 6559 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6560 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6561 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6562 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6563 */ 6564 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){ 6565 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6566 if (connection == NULL) { 6567 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6568 } 6569 connection->classic_oob_c_192 = c_192; 6570 connection->classic_oob_r_192 = r_192; 6571 6572 // ignore P-256 if not supported by us 6573 if (hci_stack->secure_connections_active){ 6574 connection->classic_oob_c_256 = c_256; 6575 connection->classic_oob_r_256 = r_256; 6576 } 6577 6578 return ERROR_CODE_SUCCESS; 6579 } 6580 /** 6581 * @brief Generate new OOB data 6582 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6583 */ 6584 void gap_ssp_generate_oob_data(void){ 6585 hci_stack->classic_read_local_oob_data = true; 6586 hci_run(); 6587 } 6588 6589 #endif 6590 6591 /** 6592 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6593 * @param inquiry_mode see bluetooth_defines.h 6594 */ 6595 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6596 hci_stack->inquiry_mode = inquiry_mode; 6597 } 6598 6599 /** 6600 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6601 */ 6602 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6603 hci_stack->sco_voice_setting = voice_setting; 6604 } 6605 6606 /** 6607 * @brief Get SCO Voice Setting 6608 * @return current voice setting 6609 */ 6610 uint16_t hci_get_sco_voice_setting(void){ 6611 return hci_stack->sco_voice_setting; 6612 } 6613 6614 static int hci_have_usb_transport(void){ 6615 if (!hci_stack->hci_transport) return 0; 6616 const char * transport_name = hci_stack->hci_transport->name; 6617 if (!transport_name) return 0; 6618 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6619 } 6620 6621 /** @brief Get SCO packet length for current SCO Voice setting 6622 * @note Using SCO packets of the exact length is required for USB transfer 6623 * @return Length of SCO packets in bytes (not audio frames) 6624 */ 6625 uint16_t hci_get_sco_packet_length(void){ 6626 uint16_t sco_packet_length = 0; 6627 6628 #ifdef ENABLE_SCO_OVER_HCI 6629 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6630 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6631 6632 if (hci_have_usb_transport()){ 6633 // see Core Spec for H2 USB Transfer. 6634 // 3 byte SCO header + 24 bytes per connection 6635 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6636 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6637 } else { 6638 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6639 sco_packet_length = 3 + 60 * multiplier; 6640 // assert that it still fits inside an SCO buffer 6641 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6642 sco_packet_length = 3 + 60; 6643 } 6644 } 6645 #endif 6646 6647 #ifdef HAVE_SCO_TRANSPORT 6648 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6649 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6650 sco_packet_length = 3 + 60 * multiplier; 6651 #endif 6652 return sco_packet_length; 6653 } 6654 6655 /** 6656 * @brief Sets the master/slave policy 6657 * @param policy (0: attempt to become master, 1: let connecting device decide) 6658 */ 6659 void hci_set_master_slave_policy(uint8_t policy){ 6660 hci_stack->master_slave_policy = policy; 6661 } 6662 6663 #endif 6664 6665 HCI_STATE hci_get_state(void){ 6666 return hci_stack->state; 6667 } 6668 6669 #ifdef ENABLE_CLASSIC 6670 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6671 hci_stack->gap_classic_accept_callback = accept_callback; 6672 } 6673 #endif 6674 6675 /** 6676 * @brief Set callback for Bluetooth Hardware Error 6677 */ 6678 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6679 hci_stack->hardware_error_callback = fn; 6680 } 6681 6682 void hci_disconnect_all(void){ 6683 btstack_linked_list_iterator_t it; 6684 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6685 while (btstack_linked_list_iterator_has_next(&it)){ 6686 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6687 if (con->state == SENT_DISCONNECT) continue; 6688 con->state = SEND_DISCONNECT; 6689 } 6690 hci_run(); 6691 } 6692 6693 uint16_t hci_get_manufacturer(void){ 6694 return hci_stack->manufacturer; 6695 } 6696 6697 #ifdef ENABLE_BLE 6698 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6699 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6700 if (!hci_con) return NULL; 6701 return &hci_con->sm_connection; 6702 } 6703 6704 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6705 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6706 #endif 6707 6708 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6709 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6710 if (hci_connection == NULL) return 0; 6711 if (hci_is_le_connection(hci_connection)){ 6712 #ifdef ENABLE_BLE 6713 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6714 if (sm_conn->sm_connection_encrypted) { 6715 return sm_conn->sm_actual_encryption_key_size; 6716 } 6717 #endif 6718 } else { 6719 #ifdef ENABLE_CLASSIC 6720 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6721 return hci_connection->encryption_key_size; 6722 } 6723 #endif 6724 } 6725 return 0; 6726 } 6727 6728 int gap_authenticated(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 6732 switch (hci_connection->address_type){ 6733 #ifdef ENABLE_BLE 6734 case BD_ADDR_TYPE_LE_PUBLIC: 6735 case BD_ADDR_TYPE_LE_RANDOM: 6736 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6737 return hci_connection->sm_connection.sm_connection_authenticated; 6738 #endif 6739 #ifdef ENABLE_CLASSIC 6740 case BD_ADDR_TYPE_SCO: 6741 case BD_ADDR_TYPE_ACL: 6742 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6743 #endif 6744 default: 6745 return 0; 6746 } 6747 } 6748 6749 int gap_secure_connection(hci_con_handle_t con_handle){ 6750 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6751 if (hci_connection == NULL) return 0; 6752 6753 switch (hci_connection->address_type){ 6754 #ifdef ENABLE_BLE 6755 case BD_ADDR_TYPE_LE_PUBLIC: 6756 case BD_ADDR_TYPE_LE_RANDOM: 6757 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6758 return hci_connection->sm_connection.sm_connection_sc; 6759 #endif 6760 #ifdef ENABLE_CLASSIC 6761 case BD_ADDR_TYPE_SCO: 6762 case BD_ADDR_TYPE_ACL: 6763 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6764 #endif 6765 default: 6766 return 0; 6767 } 6768 } 6769 6770 bool gap_bonded(hci_con_handle_t con_handle){ 6771 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6772 if (hci_connection == NULL) return 0; 6773 6774 #ifdef ENABLE_CLASSIC 6775 link_key_t link_key; 6776 link_key_type_t link_key_type; 6777 #endif 6778 switch (hci_connection->address_type){ 6779 #ifdef ENABLE_BLE 6780 case BD_ADDR_TYPE_LE_PUBLIC: 6781 case BD_ADDR_TYPE_LE_RANDOM: 6782 return hci_connection->sm_connection.sm_le_db_index >= 0; 6783 #endif 6784 #ifdef ENABLE_CLASSIC 6785 case BD_ADDR_TYPE_SCO: 6786 case BD_ADDR_TYPE_ACL: 6787 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6788 #endif 6789 default: 6790 return false; 6791 } 6792 } 6793 6794 #ifdef ENABLE_BLE 6795 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6796 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6797 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6798 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6799 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6800 return sm_conn->sm_connection_authorization_state; 6801 } 6802 #endif 6803 6804 #ifdef ENABLE_CLASSIC 6805 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){ 6806 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6807 if (!conn) return GAP_CONNECTION_INVALID; 6808 conn->sniff_min_interval = sniff_min_interval; 6809 conn->sniff_max_interval = sniff_max_interval; 6810 conn->sniff_attempt = sniff_attempt; 6811 conn->sniff_timeout = sniff_timeout; 6812 hci_run(); 6813 return 0; 6814 } 6815 6816 /** 6817 * @brief Exit Sniff mode 6818 * @param con_handle 6819 @ @return 0 if ok 6820 */ 6821 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6822 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6823 if (!conn) return GAP_CONNECTION_INVALID; 6824 conn->sniff_min_interval = 0xffff; 6825 hci_run(); 6826 return 0; 6827 } 6828 6829 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){ 6830 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6831 if (!conn) return GAP_CONNECTION_INVALID; 6832 conn->sniff_subrating_max_latency = max_latency; 6833 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6834 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6835 hci_run(); 6836 return ERROR_CODE_SUCCESS; 6837 } 6838 6839 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){ 6840 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6841 if (!conn) return GAP_CONNECTION_INVALID; 6842 conn->qos_service_type = service_type; 6843 conn->qos_token_rate = token_rate; 6844 conn->qos_peak_bandwidth = peak_bandwidth; 6845 conn->qos_latency = latency; 6846 conn->qos_delay_variation = delay_variation; 6847 hci_run(); 6848 return ERROR_CODE_SUCCESS; 6849 } 6850 6851 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6852 hci_stack->new_page_scan_interval = page_scan_interval; 6853 hci_stack->new_page_scan_window = page_scan_window; 6854 hci_run(); 6855 } 6856 6857 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6858 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6859 hci_run(); 6860 } 6861 6862 #endif 6863 6864 void hci_halting_defer(void){ 6865 if (hci_stack->state != HCI_STATE_HALTING) return; 6866 switch (hci_stack->substate){ 6867 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6868 case HCI_HALTING_CLOSE: 6869 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6870 break; 6871 default: 6872 break; 6873 } 6874 } 6875 6876 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6877 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6878 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6879 if (le_device_db_index >= le_device_db_max_count()) return; 6880 uint8_t offset = le_device_db_index >> 3; 6881 uint8_t mask = 1 << (le_device_db_index & 7); 6882 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6883 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6884 // note: go back to remove entries, otherwise, a remove + add will skip the add 6885 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6886 } 6887 } 6888 6889 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6890 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6891 if (le_device_db_index >= le_device_db_max_count()) return; 6892 uint8_t offset = le_device_db_index >> 3; 6893 uint8_t mask = 1 << (le_device_db_index & 7); 6894 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6895 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6896 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6897 } 6898 } 6899 6900 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6901 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6902 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6903 } 6904 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6905 // restart le resolving list update 6906 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6907 } 6908 return ERROR_CODE_SUCCESS; 6909 } 6910 #endif 6911 6912 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6913 void hci_setup_test_connections_fuzz(void){ 6914 hci_connection_t * conn; 6915 6916 // default address: 66:55:44:33:00:01 6917 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6918 6919 // setup Controller info 6920 hci_stack->num_cmd_packets = 255; 6921 hci_stack->acl_packets_total_num = 255; 6922 6923 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6924 addr[5] = 0x01; 6925 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6926 conn->con_handle = addr[5]; 6927 conn->role = HCI_ROLE_SLAVE; 6928 conn->state = RECEIVED_CONNECTION_REQUEST; 6929 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6930 6931 // setup incoming Classic SCO connection with con handle 0x0002 6932 addr[5] = 0x02; 6933 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6934 conn->con_handle = addr[5]; 6935 conn->role = HCI_ROLE_SLAVE; 6936 conn->state = RECEIVED_CONNECTION_REQUEST; 6937 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6938 6939 // setup ready Classic ACL connection with con handle 0x0003 6940 addr[5] = 0x03; 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 = OPEN; 6945 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6946 6947 // setup ready Classic SCO connection with con handle 0x0004 6948 addr[5] = 0x04; 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 = OPEN; 6953 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6954 6955 // setup ready LE ACL connection with con handle 0x005 and public address 6956 addr[5] = 0x05; 6957 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 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 conn->sm_connection.sm_connection_encrypted = 1; 6963 } 6964 6965 void hci_free_connections_fuzz(void){ 6966 btstack_linked_list_iterator_t it; 6967 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6968 while (btstack_linked_list_iterator_has_next(&it)){ 6969 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6970 btstack_linked_list_iterator_remove(&it); 6971 btstack_memory_hci_connection_free(con); 6972 } 6973 } 6974 void hci_simulate_working_fuzz(void){ 6975 hci_init_done(); 6976 hci_stack->num_cmd_packets = 255; 6977 } 6978 #endif 6979