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 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 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){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 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); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 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] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return false; 443 return hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 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){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 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); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 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); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 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); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 bool hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return false; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return true; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 bool hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return false; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 bool hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return false; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 bool hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 bool hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 bool hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 bool hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return false; 701 } 702 hci_stack->hci_packet_buffer_reserved = true; 703 return true; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = false; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // 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); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 uint8_t status = ERROR_CODE_SUCCESS; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 if (err != 0){ 781 // no error from HCI Transport expected 782 status = ERROR_CODE_HARDWARE_FAILURE; 783 } 784 785 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 786 787 // done yet? 788 if (!more_fragments) break; 789 790 // can send more? 791 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 792 } 793 794 log_debug("hci_send_acl_packet_fragments loop over"); 795 796 // release buffer now for synchronous transport 797 if (hci_transport_synchronous()){ 798 hci_stack->acl_fragmentation_tx_active = 0; 799 hci_release_packet_buffer(); 800 hci_emit_transport_packet_sent(); 801 } 802 803 return status; 804 } 805 806 // pre: caller has reserved the packet buffer 807 uint8_t hci_send_acl_packet_buffer(int size){ 808 btstack_assert(hci_stack->hci_packet_buffer_reserved); 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 815 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 hci_connection_t *connection = hci_connection_for_handle( con_handle); 822 if (!connection) { 823 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 827 } 828 829 #ifdef ENABLE_CLASSIC 830 hci_connection_timestamp(connection); 831 #endif 832 833 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 834 835 // setup data 836 hci_stack->acl_fragmentation_total_size = size; 837 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 838 839 return hci_send_acl_packet_fragments(connection); 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // pre: caller has reserved the packet buffer 844 uint8_t hci_send_sco_packet_buffer(int size){ 845 btstack_assert(hci_stack->hci_packet_buffer_reserved); 846 847 uint8_t * packet = hci_stack->hci_packet_buffer; 848 849 // skip checks in loopback mode 850 if (!hci_stack->loopback_mode){ 851 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 852 853 // check for free places on Bluetooth module 854 if (!hci_can_send_prepared_sco_packet_now()) { 855 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 return BTSTACK_ACL_BUFFERS_FULL; 859 } 860 861 // track send packet in connection struct 862 hci_connection_t *connection = hci_connection_for_handle( con_handle); 863 if (!connection) { 864 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 865 hci_release_packet_buffer(); 866 hci_emit_transport_packet_sent(); 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 870 if (hci_have_usb_transport()){ 871 // token used 872 hci_stack->sco_can_send_now = false; 873 } else { 874 if (hci_stack->synchronous_flow_control_enabled){ 875 connection->num_packets_sent++; 876 } else { 877 connection->sco_tx_ready--; 878 } 879 } 880 } 881 882 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 883 884 #ifdef HAVE_SCO_TRANSPORT 885 hci_stack->sco_transport->send_packet(packet, size); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 889 return 0; 890 #else 891 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 892 if (hci_transport_synchronous()){ 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 } 896 897 if (err != 0){ 898 return ERROR_CODE_HARDWARE_FAILURE; 899 } 900 return ERROR_CODE_SUCCESS; 901 #endif 902 } 903 #endif 904 905 static void acl_handler(uint8_t *packet, uint16_t size){ 906 907 // get info 908 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 909 hci_connection_t *conn = hci_connection_for_handle(con_handle); 910 uint8_t acl_flags = READ_ACL_FLAGS(packet); 911 uint16_t acl_length = READ_ACL_LENGTH(packet); 912 913 // ignore non-registered handle 914 if (!conn){ 915 log_error("acl_handler called with non-registered handle %u!" , con_handle); 916 return; 917 } 918 919 // assert packet is complete 920 if ((acl_length + 4u) != size){ 921 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 922 return; 923 } 924 925 #ifdef ENABLE_CLASSIC 926 // update idle timestamp 927 hci_connection_timestamp(conn); 928 #endif 929 930 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 931 hci_stack->host_completed_packets = 1; 932 conn->num_packets_completed++; 933 #endif 934 935 // handle different packet types 936 switch (acl_flags & 0x03u) { 937 938 case 0x01: // continuation fragment 939 940 // sanity checks 941 if (conn->acl_recombination_pos == 0u) { 942 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 943 return; 944 } 945 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 946 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 947 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 948 conn->acl_recombination_pos = 0; 949 return; 950 } 951 952 // append fragment payload (header already stored) 953 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 954 &packet[4], acl_length); 955 conn->acl_recombination_pos += acl_length; 956 957 // forward complete L2CAP packet if complete. 958 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 959 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 960 // reset recombination buffer 961 conn->acl_recombination_length = 0; 962 conn->acl_recombination_pos = 0; 963 } 964 break; 965 966 case 0x02: { // first fragment 967 968 // sanity check 969 if (conn->acl_recombination_pos) { 970 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 971 conn->acl_recombination_pos = 0; 972 } 973 974 // peek into L2CAP packet! 975 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 976 977 // compare fragment size to L2CAP packet size 978 if (acl_length >= (l2cap_length + 4u)){ 979 // forward fragment as L2CAP packet 980 hci_emit_acl_packet(packet, acl_length + 4u); 981 } else { 982 983 if (acl_length > HCI_ACL_BUFFER_SIZE){ 984 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 985 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 986 return; 987 } 988 989 // store first fragment and tweak acl length for complete package 990 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 991 packet, acl_length + 4u); 992 conn->acl_recombination_pos = acl_length + 4u; 993 conn->acl_recombination_length = l2cap_length; 994 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 995 } 996 break; 997 998 } 999 default: 1000 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1001 return; 1002 } 1003 1004 // execute main loop 1005 hci_run(); 1006 } 1007 1008 static void hci_shutdown_connection(hci_connection_t *conn){ 1009 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1010 1011 #ifdef ENABLE_CLASSIC 1012 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1013 bd_addr_type_t addr_type = conn->address_type; 1014 #endif 1015 #ifdef HAVE_SCO_TRANSPORT 1016 hci_con_handle_t con_handle = conn->con_handle; 1017 #endif 1018 #endif 1019 1020 btstack_run_loop_remove_timer(&conn->timeout); 1021 1022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1023 btstack_memory_hci_connection_free( conn ); 1024 1025 // now it's gone 1026 hci_emit_nr_connections_changed(); 1027 1028 #ifdef ENABLE_CLASSIC 1029 #ifdef ENABLE_SCO_OVER_HCI 1030 // update SCO 1031 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1032 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1033 } 1034 #endif 1035 #ifdef HAVE_SCO_TRANSPORT 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1037 hci_stack->sco_transport->close(con_handle); 1038 } 1039 #endif 1040 #endif 1041 } 1042 1043 #ifdef ENABLE_CLASSIC 1044 1045 static const uint16_t packet_type_sizes[] = { 1046 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1047 HCI_ACL_DH1_SIZE, 0, 0, 0, 1048 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1049 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1050 }; 1051 static const uint8_t packet_type_feature_requirement_bit[] = { 1052 0, // 3 slot packets 1053 1, // 5 slot packets 1054 25, // EDR 2 mpbs 1055 26, // EDR 3 mbps 1056 39, // 3 slot EDR packts 1057 40, // 5 slot EDR packet 1058 }; 1059 static const uint16_t packet_type_feature_packet_mask[] = { 1060 0x0f00, // 3 slot packets 1061 0xf000, // 5 slot packets 1062 0x1102, // EDR 2 mpbs 1063 0x2204, // EDR 3 mbps 1064 0x0300, // 3 slot EDR packts 1065 0x3000, // 5 slot EDR packet 1066 }; 1067 1068 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1069 // enable packet types based on size 1070 uint16_t packet_types = 0; 1071 unsigned int i; 1072 for (i=0;i<16;i++){ 1073 if (packet_type_sizes[i] == 0) continue; 1074 if (packet_type_sizes[i] <= buffer_size){ 1075 packet_types |= 1 << i; 1076 } 1077 } 1078 // disable packet types due to missing local supported features 1079 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1080 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1081 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1082 if (feature_set) continue; 1083 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1084 packet_types &= ~packet_type_feature_packet_mask[i]; 1085 } 1086 // flip bits for "may not be used" 1087 packet_types ^= 0x3306; 1088 return packet_types; 1089 } 1090 1091 uint16_t hci_usable_acl_packet_types(void){ 1092 return hci_stack->packet_types; 1093 } 1094 #endif 1095 1096 uint8_t* hci_get_outgoing_packet_buffer(void){ 1097 // hci packet buffer is >= acl data packet length 1098 return hci_stack->hci_packet_buffer; 1099 } 1100 1101 uint16_t hci_max_acl_data_packet_length(void){ 1102 return hci_stack->acl_data_packet_length; 1103 } 1104 1105 #ifdef ENABLE_CLASSIC 1106 bool hci_extended_sco_link_supported(void){ 1107 // No. 31, byte 3, bit 7 1108 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1109 } 1110 #endif 1111 1112 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1113 // No. 54, byte 6, bit 6 1114 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1115 } 1116 1117 static int gap_ssp_supported(void){ 1118 // No. 51, byte 6, bit 3 1119 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1120 } 1121 1122 static int hci_classic_supported(void){ 1123 #ifdef ENABLE_CLASSIC 1124 // No. 37, byte 4, bit 5, = No BR/EDR Support 1125 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1126 #else 1127 return 0; 1128 #endif 1129 } 1130 1131 static int hci_le_supported(void){ 1132 #ifdef ENABLE_BLE 1133 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1134 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1135 #else 1136 return 0; 1137 #endif 1138 } 1139 1140 #ifdef ENABLE_BLE 1141 1142 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1143 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1144 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1145 } else { 1146 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1147 } 1148 } 1149 1150 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1151 *addr_type = hci_stack->le_own_addr_type; 1152 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1153 } 1154 1155 #ifdef ENABLE_LE_PERIPHERAL 1156 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1157 *addr_type = hci_stack->le_advertisements_own_addr_type; 1158 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1159 }; 1160 #endif 1161 1162 #ifdef ENABLE_LE_CENTRAL 1163 1164 /** 1165 * @brief Get own addr type and address used for LE connections (Central) 1166 */ 1167 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1168 *addr_type = hci_stack->le_connection_own_addr_type; 1169 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1170 } 1171 1172 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1173 1174 int offset = 3; 1175 int num_reports = packet[offset]; 1176 offset += 1; 1177 1178 int i; 1179 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1180 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1181 for (i=0; (i<num_reports) && (offset < size);i++){ 1182 // sanity checks on data_length: 1183 uint8_t data_length = packet[offset + 8]; 1184 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1185 if ((offset + 9u + data_length + 1u) > size) return; 1186 // setup event 1187 uint8_t event_size = 10u + data_length; 1188 int pos = 0; 1189 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1190 event[pos++] = event_size; 1191 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1192 offset += 8; 1193 pos += 8; 1194 event[pos++] = packet[offset + 1 + data_length]; // rssi 1195 event[pos++] = data_length; 1196 offset++; 1197 (void)memcpy(&event[pos], &packet[offset], data_length); 1198 pos += data_length; 1199 offset += data_length + 1u; // rssi 1200 hci_emit_event(event, pos, 1); 1201 } 1202 } 1203 #endif 1204 #endif 1205 1206 #ifdef ENABLE_BLE 1207 #ifdef ENABLE_LE_PERIPHERAL 1208 static void hci_update_advertisements_enabled_for_current_roles(void){ 1209 if (hci_stack->le_advertisements_enabled){ 1210 // get number of active le slave connections 1211 int num_slave_connections = 0; 1212 btstack_linked_list_iterator_t it; 1213 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1214 while (btstack_linked_list_iterator_has_next(&it)){ 1215 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1216 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1217 if (con->state != OPEN) continue; 1218 if (con->role != HCI_ROLE_SLAVE) continue; 1219 if (!hci_is_le_connection(con)) continue; 1220 num_slave_connections++; 1221 } 1222 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1223 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1224 } else { 1225 hci_stack->le_advertisements_enabled_for_current_roles = false; 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_CLASSIC 1232 static void gap_run_set_local_name(void){ 1233 hci_reserve_packet_buffer(); 1234 uint8_t * packet = hci_stack->hci_packet_buffer; 1235 // construct HCI Command and send 1236 uint16_t opcode = hci_write_local_name.opcode; 1237 hci_stack->last_cmd_opcode = opcode; 1238 packet[0] = opcode & 0xff; 1239 packet[1] = opcode >> 8; 1240 packet[2] = DEVICE_NAME_LEN; 1241 memset(&packet[3], 0, DEVICE_NAME_LEN); 1242 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1243 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1244 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1245 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1246 // expand '00:00:00:00:00:00' in name with bd_addr 1247 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1248 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1249 } 1250 1251 static void gap_run_set_eir_data(void){ 1252 hci_reserve_packet_buffer(); 1253 uint8_t * packet = hci_stack->hci_packet_buffer; 1254 // construct HCI Command in-place and send 1255 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1256 hci_stack->last_cmd_opcode = opcode; 1257 uint16_t offset = 0; 1258 packet[offset++] = opcode & 0xff; 1259 packet[offset++] = opcode >> 8; 1260 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1261 packet[offset++] = 0; // FEC not required 1262 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1263 if (hci_stack->eir_data){ 1264 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1265 ad_context_t context; 1266 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1267 uint8_t data_type = ad_iterator_get_data_type(&context); 1268 uint8_t size = ad_iterator_get_data_len(&context); 1269 const uint8_t *data = ad_iterator_get_data(&context); 1270 // copy item 1271 packet[offset++] = size + 1; 1272 packet[offset++] = data_type; 1273 memcpy(&packet[offset], data, size); 1274 // update name item 1275 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1276 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1277 } 1278 offset += size; 1279 } 1280 } else { 1281 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1282 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1283 packet[offset++] = bytes_to_copy + 1; 1284 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1285 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1286 // expand '00:00:00:00:00:00' in name with bd_addr 1287 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1288 } 1289 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1290 } 1291 #endif 1292 1293 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1294 1295 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1296 if (!hci_stack->config) return 0; 1297 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1298 // Limit baud rate for Broadcom chipsets to 3 mbps 1299 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1300 baud_rate = 3000000; 1301 } 1302 return baud_rate; 1303 } 1304 1305 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1306 UNUSED(ds); 1307 1308 switch (hci_stack->substate){ 1309 case HCI_INIT_W4_SEND_RESET: 1310 log_info("Resend HCI Reset"); 1311 hci_stack->substate = HCI_INIT_SEND_RESET; 1312 hci_stack->num_cmd_packets = 1; 1313 hci_run(); 1314 break; 1315 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1316 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1317 if (hci_stack->hci_transport->reset_link){ 1318 hci_stack->hci_transport->reset_link(); 1319 } 1320 1321 /* fall through */ 1322 1323 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1324 log_info("Resend HCI Reset - CSR Warm Boot"); 1325 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1326 hci_stack->num_cmd_packets = 1; 1327 hci_run(); 1328 break; 1329 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1330 if (hci_stack->hci_transport->set_baudrate){ 1331 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1332 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1336 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1337 if (hci_stack->hci_transport->reset_link){ 1338 log_info("Link Reset"); 1339 hci_stack->hci_transport->reset_link(); 1340 } 1341 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1342 hci_run(); 1343 } 1344 break; 1345 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1346 // otherwise continue 1347 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1348 hci_send_cmd(&hci_read_local_supported_commands); 1349 break; 1350 default: 1351 break; 1352 } 1353 } 1354 #endif 1355 1356 static void hci_initializing_next_state(void){ 1357 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1358 } 1359 1360 // assumption: hci_can_send_command_packet_now() == true 1361 static void hci_initializing_run(void){ 1362 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1363 switch (hci_stack->substate){ 1364 case HCI_INIT_SEND_RESET: 1365 hci_state_reset(); 1366 1367 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1368 // prepare reset if command complete not received in 100ms 1369 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1370 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1371 btstack_run_loop_add_timer(&hci_stack->timeout); 1372 #endif 1373 // send command 1374 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1375 hci_send_cmd(&hci_reset); 1376 break; 1377 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1378 hci_send_cmd(&hci_read_local_version_information); 1379 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1380 break; 1381 case HCI_INIT_SEND_READ_LOCAL_NAME: 1382 hci_send_cmd(&hci_read_local_name); 1383 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1384 break; 1385 1386 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1387 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1388 hci_state_reset(); 1389 // prepare reset if command complete not received in 100ms 1390 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1391 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1392 btstack_run_loop_add_timer(&hci_stack->timeout); 1393 // send command 1394 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1395 hci_send_cmd(&hci_reset); 1396 break; 1397 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1398 hci_state_reset(); 1399 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1400 hci_send_cmd(&hci_reset); 1401 break; 1402 case HCI_INIT_SEND_BAUD_CHANGE: { 1403 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1404 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1405 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1406 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1407 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1408 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1409 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1410 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1411 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1412 btstack_run_loop_add_timer(&hci_stack->timeout); 1413 } 1414 break; 1415 } 1416 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1417 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1418 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1419 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1420 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1421 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1422 break; 1423 } 1424 case HCI_INIT_CUSTOM_INIT: 1425 // Custom initialization 1426 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1427 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1428 bool send_cmd = false; 1429 switch (hci_stack->chipset_result){ 1430 case BTSTACK_CHIPSET_VALID_COMMAND: 1431 send_cmd = true; 1432 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1433 break; 1434 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1435 send_cmd = true; 1436 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1437 log_info("CSR Warm Boot"); 1438 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1439 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1440 btstack_run_loop_add_timer(&hci_stack->timeout); 1441 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1442 && hci_stack->config 1443 && hci_stack->chipset 1444 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1445 && hci_stack->hci_transport->set_baudrate 1446 && hci_transport_uart_get_main_baud_rate()){ 1447 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1448 } else { 1449 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1450 } 1451 break; 1452 default: 1453 break; 1454 } 1455 1456 if (send_cmd){ 1457 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1458 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1459 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1460 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1461 break; 1462 } 1463 log_info("Init script done"); 1464 1465 // Init script download on Broadcom chipsets causes: 1466 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1467 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1468 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1469 1470 // - baud rate to reset, restore UART baud rate if needed 1471 int need_baud_change = hci_stack->config 1472 && hci_stack->chipset 1473 && hci_stack->chipset->set_baudrate_command 1474 && hci_stack->hci_transport->set_baudrate 1475 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1476 if (need_baud_change) { 1477 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1478 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1479 hci_stack->hci_transport->set_baudrate(baud_rate); 1480 } 1481 1482 uint16_t bcm_delay_ms = 300; 1483 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1484 // -> Work around: wait here. 1485 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1486 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1487 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1488 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1489 btstack_run_loop_add_timer(&hci_stack->timeout); 1490 break; 1491 } 1492 } 1493 // otherwise continue 1494 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1495 hci_send_cmd(&hci_read_local_supported_commands); 1496 break; 1497 case HCI_INIT_SET_BD_ADDR: 1498 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1499 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1500 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1501 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1502 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1503 break; 1504 #endif 1505 1506 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1507 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1508 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1509 hci_send_cmd(&hci_read_local_supported_commands); 1510 break; 1511 case HCI_INIT_READ_BD_ADDR: 1512 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1513 hci_send_cmd(&hci_read_bd_addr); 1514 break; 1515 case HCI_INIT_READ_BUFFER_SIZE: 1516 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1517 hci_send_cmd(&hci_read_buffer_size); 1518 break; 1519 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1520 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1521 hci_send_cmd(&hci_read_local_supported_features); 1522 break; 1523 1524 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1525 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1526 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1527 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1528 break; 1529 case HCI_INIT_HOST_BUFFER_SIZE: 1530 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1531 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1532 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1533 break; 1534 #endif 1535 1536 case HCI_INIT_SET_EVENT_MASK: 1537 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1538 if (hci_le_supported()){ 1539 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1540 } else { 1541 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1542 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1543 } 1544 break; 1545 1546 #ifdef ENABLE_CLASSIC 1547 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1548 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1549 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1550 break; 1551 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1552 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1553 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1554 break; 1555 case HCI_INIT_WRITE_INQUIRY_MODE: 1556 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1557 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1558 break; 1559 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1560 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1561 hci_stack->secure_connections_active = true; 1562 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1563 break; 1564 case HCI_INIT_WRITE_SCAN_ENABLE: 1565 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1566 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1567 break; 1568 // only sent if ENABLE_SCO_OVER_HCI is defined 1569 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1570 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1571 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1572 break; 1573 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1574 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1575 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1576 break; 1577 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1578 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1579 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1580 #ifdef ENABLE_SCO_OVER_HCI 1581 log_info("BCM: Route SCO data via HCI transport"); 1582 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1583 #endif 1584 #ifdef ENABLE_SCO_OVER_PCM 1585 log_info("BCM: Route SCO data via PCM interface"); 1586 #ifdef ENABLE_BCM_PCM_WBS 1587 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1588 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1589 #else 1590 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1591 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1592 #endif 1593 #endif 1594 break; 1595 #ifdef ENABLE_SCO_OVER_PCM 1596 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1597 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1598 log_info("BCM: Config PCM interface for I2S"); 1599 #ifdef ENABLE_BCM_PCM_WBS 1600 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1601 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1605 #endif 1606 break; 1607 #endif 1608 #endif 1609 1610 #ifdef ENABLE_BLE 1611 // LE INIT 1612 case HCI_INIT_LE_READ_BUFFER_SIZE: 1613 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1614 hci_send_cmd(&hci_le_read_buffer_size); 1615 break; 1616 case HCI_INIT_LE_SET_EVENT_MASK: 1617 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1618 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1619 break; 1620 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1621 // LE Supported Host = 1, Simultaneous Host = 0 1622 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1623 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1624 break; 1625 #endif 1626 1627 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1628 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1629 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1630 hci_send_cmd(&hci_le_read_maximum_data_length); 1631 break; 1632 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1633 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1634 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1635 break; 1636 #endif 1637 1638 #ifdef ENABLE_LE_CENTRAL 1639 case HCI_INIT_READ_WHITE_LIST_SIZE: 1640 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1641 hci_send_cmd(&hci_le_read_white_list_size); 1642 break; 1643 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1644 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1645 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); 1646 break; 1647 #endif 1648 default: 1649 return; 1650 } 1651 } 1652 1653 static void hci_init_done(void){ 1654 // done. tell the app 1655 log_info("hci_init_done -> HCI_STATE_WORKING"); 1656 hci_stack->state = HCI_STATE_WORKING; 1657 hci_emit_state(); 1658 hci_run(); 1659 } 1660 1661 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1662 bool command_completed = false; 1663 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1664 uint16_t opcode = little_endian_read_16(packet,3); 1665 if (opcode == hci_stack->last_cmd_opcode){ 1666 command_completed = true; 1667 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1668 } else { 1669 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1670 } 1671 } 1672 1673 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1674 uint8_t status = packet[2]; 1675 uint16_t opcode = little_endian_read_16(packet,4); 1676 if (opcode == hci_stack->last_cmd_opcode){ 1677 if (status){ 1678 command_completed = true; 1679 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1680 } else { 1681 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1682 } 1683 } else { 1684 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1685 } 1686 } 1687 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1688 // Vendor == CSR 1689 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1690 // TODO: track actual command 1691 command_completed = true; 1692 } 1693 1694 // Vendor == Toshiba 1695 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1696 // TODO: track actual command 1697 command_completed = true; 1698 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1699 hci_stack->num_cmd_packets = 1; 1700 } 1701 #endif 1702 1703 return command_completed; 1704 } 1705 1706 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1707 1708 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1709 1710 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1711 1712 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1713 1714 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1715 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1716 // 1717 // HCI Reset 1718 // Timeout 100 ms 1719 // HCI Reset 1720 // Command Complete Reset 1721 // HCI Read Local Version Information 1722 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1723 // hang... 1724 // 1725 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1726 if (!command_completed 1727 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1728 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1729 1730 uint16_t opcode = little_endian_read_16(packet,3); 1731 if (opcode == hci_reset.opcode){ 1732 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1733 return; 1734 } 1735 } 1736 1737 // CSR & H5 1738 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1739 if (!command_completed 1740 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1741 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1746 return; 1747 } 1748 } 1749 1750 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1751 // fix: Correct substate and behave as command below 1752 if (command_completed){ 1753 switch (hci_stack->substate){ 1754 case HCI_INIT_SEND_RESET: 1755 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1756 break; 1757 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1759 break; 1760 default: 1761 break; 1762 } 1763 } 1764 1765 #endif 1766 1767 if (!command_completed) return; 1768 1769 bool need_baud_change = false; 1770 bool need_addr_change = false; 1771 1772 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1773 need_baud_change = hci_stack->config 1774 && hci_stack->chipset 1775 && hci_stack->chipset->set_baudrate_command 1776 && hci_stack->hci_transport->set_baudrate 1777 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1778 1779 need_addr_change = hci_stack->custom_bd_addr_set 1780 && hci_stack->chipset 1781 && hci_stack->chipset->set_bd_addr_command; 1782 #endif 1783 1784 switch(hci_stack->substate){ 1785 1786 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1787 case HCI_INIT_SEND_RESET: 1788 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1789 // fix: just correct substate and behave as command below 1790 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1791 btstack_run_loop_remove_timer(&hci_stack->timeout); 1792 break; 1793 case HCI_INIT_W4_SEND_RESET: 1794 btstack_run_loop_remove_timer(&hci_stack->timeout); 1795 break; 1796 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1797 log_info("Received local name, need baud change %d", (int) need_baud_change); 1798 if (need_baud_change){ 1799 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1800 return; 1801 } 1802 // skip baud change 1803 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1804 return; 1805 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1806 // for STLC2500D, baud rate change already happened. 1807 // for others, baud rate gets changed now 1808 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1809 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1810 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1811 hci_stack->hci_transport->set_baudrate(baud_rate); 1812 } 1813 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1814 return; 1815 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1816 btstack_run_loop_remove_timer(&hci_stack->timeout); 1817 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1818 return; 1819 case HCI_INIT_W4_CUSTOM_INIT: 1820 // repeat custom init 1821 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1822 return; 1823 #else 1824 case HCI_INIT_W4_SEND_RESET: 1825 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1826 return ; 1827 #endif 1828 1829 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1830 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1831 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1832 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1833 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1834 return; 1835 } 1836 if (need_addr_change){ 1837 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1838 return; 1839 } 1840 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1841 return; 1842 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1843 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1844 if (need_baud_change){ 1845 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1846 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1847 hci_stack->hci_transport->set_baudrate(baud_rate); 1848 } 1849 if (need_addr_change){ 1850 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1851 return; 1852 } 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 case HCI_INIT_W4_SET_BD_ADDR: 1856 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1857 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1858 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1859 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1860 return; 1861 } 1862 // skipping st warm boot 1863 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1864 return; 1865 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 #endif 1869 case HCI_INIT_W4_READ_BD_ADDR: 1870 // only read buffer size if supported 1871 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1872 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1873 return; 1874 } 1875 // skipping read buffer size 1876 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1877 return; 1878 case HCI_INIT_W4_SET_EVENT_MASK: 1879 // skip Classic init commands for LE only chipsets 1880 if (!hci_classic_supported()){ 1881 #ifdef ENABLE_BLE 1882 if (hci_le_supported()){ 1883 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1884 return; 1885 } 1886 #endif 1887 log_error("Neither BR/EDR nor LE supported"); 1888 hci_init_done(); 1889 return; 1890 } 1891 if (!gap_ssp_supported()){ 1892 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1893 return; 1894 } 1895 break; 1896 #ifdef ENABLE_BLE 1897 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1898 // skip write le host if not supported (e.g. on LE only EM9301) 1899 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1900 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1901 return; 1902 1903 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1904 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1905 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1906 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1907 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1908 return; 1909 } 1910 // explicit fall through to reduce repetitions 1911 1912 #ifdef ENABLE_LE_CENTRAL 1913 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1914 #else 1915 hci_init_done(); 1916 #endif 1917 return; 1918 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1919 1920 #endif /* ENABLE_BLE */ 1921 1922 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1923 // skip write secure connections host support if not supported or disabled 1924 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1925 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1926 return; 1927 } 1928 break; 1929 1930 #ifdef ENABLE_SCO_OVER_HCI 1931 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1932 // skip write synchronous flow control if not supported 1933 if (hci_stack->local_supported_commands[0] & 0x04) break; 1934 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1935 1936 /* fall through */ 1937 1938 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1939 // skip write default erroneous data reporting if not supported 1940 if (hci_stack->local_supported_commands[0] & 0x08) break; 1941 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1946 // skip bcm set sco pcm config on non-Broadcom chipsets 1947 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1948 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1953 if (!hci_le_supported()){ 1954 // SKIP LE init for Classic only configuration 1955 hci_init_done(); 1956 return; 1957 } 1958 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1959 break; 1960 1961 #else /* !ENABLE_SCO_OVER_HCI */ 1962 1963 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1964 #ifdef ENABLE_SCO_OVER_PCM 1965 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1966 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1967 return; 1968 } 1969 #endif 1970 /* fall through */ 1971 1972 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1973 #ifdef ENABLE_BLE 1974 if (hci_le_supported()){ 1975 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1976 return; 1977 } 1978 #endif 1979 // SKIP LE init for Classic only configuration 1980 hci_init_done(); 1981 return; 1982 #endif /* ENABLE_SCO_OVER_HCI */ 1983 1984 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1985 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1986 // Response to command before init done state -> init done 1987 case (HCI_INIT_DONE-1): 1988 hci_init_done(); 1989 return; 1990 #endif 1991 1992 default: 1993 break; 1994 } 1995 hci_initializing_next_state(); 1996 } 1997 1998 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1999 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2000 bd_addr_t bd_address; 2001 (void)memcpy(&bd_address, conn->address, 6); 2002 2003 #ifdef ENABLE_CLASSIC 2004 // cache needed data 2005 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2006 #endif 2007 2008 // connection failed, remove entry 2009 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2010 btstack_memory_hci_connection_free( conn ); 2011 2012 #ifdef ENABLE_CLASSIC 2013 // notify client if dedicated bonding 2014 if (notify_dedicated_bonding_failed){ 2015 log_info("hci notify_dedicated_bonding_failed"); 2016 hci_emit_dedicated_bonding_result(bd_address, status); 2017 } 2018 2019 // if authentication error, also delete link key 2020 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2021 gap_drop_link_key_for_bd_addr(bd_address); 2022 } 2023 #else 2024 UNUSED(status); 2025 #endif 2026 } 2027 2028 #ifdef ENABLE_CLASSIC 2029 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2030 // SSP Controller 2031 if (features[6] & (1 << 3)){ 2032 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2033 } 2034 // eSCO 2035 if (features[3] & (1<<7)){ 2036 conn->remote_supported_features[0] |= 1; 2037 } 2038 // Extended features 2039 if (features[7] & (1<<7)){ 2040 conn->remote_supported_features[0] |= 2; 2041 } 2042 } 2043 2044 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2045 // SSP Host 2046 if (features[0] & (1 << 0)){ 2047 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2048 } 2049 // SC Host 2050 if (features[0] & (1 << 3)){ 2051 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2052 } 2053 } 2054 2055 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2056 // SC Controller 2057 if (features[1] & (1 << 0)){ 2058 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2059 } 2060 } 2061 2062 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2063 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2064 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2065 if (conn->bonding_flags & BONDING_DEDICATED){ 2066 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2067 } 2068 } 2069 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2070 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2071 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2072 } 2073 2074 #endif 2075 2076 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2077 // handle BT initialization 2078 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2079 hci_initializing_event_handler(packet, size); 2080 } 2081 2082 // help with BT sleep 2083 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2084 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2085 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2086 hci_initializing_next_state(); 2087 } 2088 } 2089 2090 #ifdef ENABLE_CLASSIC 2091 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2092 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2093 conn->encryption_key_size = encryption_key_size; 2094 2095 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2096 conn->requested_security_level = LEVEL_0; 2097 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2098 return; 2099 } 2100 2101 // Request Authentication if not already done 2102 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2103 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2104 } 2105 #endif 2106 2107 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2108 UNUSED(size); 2109 2110 uint16_t manufacturer; 2111 #ifdef ENABLE_CLASSIC 2112 hci_con_handle_t handle; 2113 hci_connection_t * conn; 2114 uint8_t status; 2115 #endif 2116 // get num cmd packets - limit to 1 to reduce complexity 2117 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2118 2119 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2120 switch (opcode){ 2121 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2122 if (packet[5]) break; 2123 // terminate, name 248 chars 2124 packet[6+248] = 0; 2125 log_info("local name: %s", &packet[6]); 2126 break; 2127 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2128 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2129 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2130 uint16_t acl_len = little_endian_read_16(packet, 6); 2131 uint16_t sco_len = packet[8]; 2132 2133 // determine usable ACL/SCO payload size 2134 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2135 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2136 2137 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2138 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2139 2140 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2141 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2142 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2143 } 2144 break; 2145 case HCI_OPCODE_HCI_READ_RSSI: 2146 if (packet[5] == ERROR_CODE_SUCCESS){ 2147 uint8_t event[5]; 2148 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2149 event[1] = 3; 2150 (void)memcpy(&event[2], &packet[6], 3); 2151 hci_emit_event(event, sizeof(event), 1); 2152 } 2153 break; 2154 #ifdef ENABLE_BLE 2155 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2156 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2157 hci_stack->le_acl_packets_total_num = packet[8]; 2158 // determine usable ACL payload size 2159 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2160 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2161 } 2162 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2163 break; 2164 #endif 2165 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2166 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2167 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2168 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2169 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); 2170 break; 2171 #endif 2172 #ifdef ENABLE_LE_CENTRAL 2173 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2174 hci_stack->le_whitelist_capacity = packet[6]; 2175 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2176 break; 2177 #endif 2178 case HCI_OPCODE_HCI_READ_BD_ADDR: 2179 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2180 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)); 2181 #ifdef ENABLE_CLASSIC 2182 if (hci_stack->link_key_db){ 2183 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2184 } 2185 #endif 2186 break; 2187 #ifdef ENABLE_CLASSIC 2188 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2189 hci_emit_discoverable_enabled(hci_stack->discoverable); 2190 break; 2191 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2192 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2193 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2194 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2195 hci_emit_event(event, sizeof(event), 1); 2196 } 2197 break; 2198 #endif 2199 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2200 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2201 2202 #ifdef ENABLE_CLASSIC 2203 // determine usable ACL packet types based on host buffer size and supported features 2204 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2205 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2206 #endif 2207 // Classic/LE 2208 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2209 break; 2210 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2211 manufacturer = little_endian_read_16(packet, 10); 2212 // map Cypress to Broadcom 2213 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2214 log_info("Treat Cypress as Broadcom"); 2215 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2216 little_endian_store_16(packet, 10, manufacturer); 2217 } 2218 hci_stack->manufacturer = manufacturer; 2219 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2220 break; 2221 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2222 hci_stack->local_supported_commands[0] = 2223 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2224 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2225 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2226 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2227 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2228 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2229 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2230 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2231 hci_stack->local_supported_commands[1] = 2232 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2233 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2234 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2237 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2238 break; 2239 #ifdef ENABLE_CLASSIC 2240 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2241 if (packet[5]) return; 2242 hci_stack->synchronous_flow_control_enabled = 1; 2243 break; 2244 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2245 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2246 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2247 conn = hci_connection_for_handle(handle); 2248 if (conn != NULL) { 2249 uint8_t key_size = 0; 2250 if (status == 0){ 2251 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2252 log_info("Handle %04x key Size: %u", handle, key_size); 2253 } else { 2254 key_size = 1; 2255 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2256 } 2257 hci_handle_read_encryption_key_size_complete(conn, key_size); 2258 } 2259 break; 2260 // assert pairing complete event is emitted. 2261 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2262 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2263 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2264 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2265 // lookup connection by gap pairing addr 2266 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2267 if (conn == NULL) break; 2268 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2269 break; 2270 2271 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2272 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2273 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2274 uint8_t event[67]; 2275 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2276 event[1] = 65; 2277 (void)memset(&event[2], 0, 65); 2278 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2279 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2280 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2281 event[2] = 3; 2282 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2283 } else { 2284 event[2] = 1; 2285 } 2286 } 2287 hci_emit_event(event, sizeof(event), 0); 2288 break; 2289 } 2290 2291 // note: only needed if user does not provide OOB data 2292 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2293 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2294 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2295 if (conn == NULL) break; 2296 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2297 break; 2298 #endif 2299 #endif 2300 default: 2301 break; 2302 } 2303 } 2304 2305 #ifdef ENABLE_BLE 2306 static void event_handle_le_connection_complete(const uint8_t * packet){ 2307 bd_addr_t addr; 2308 bd_addr_type_t addr_type; 2309 hci_connection_t * conn; 2310 2311 // Connection management 2312 reverse_bd_addr(&packet[8], addr); 2313 addr_type = (bd_addr_type_t)packet[7]; 2314 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2315 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2316 2317 #ifdef ENABLE_LE_CENTRAL 2318 // handle error: error is reported only to the initiator -> outgoing connection 2319 if (packet[3]){ 2320 2321 // handle cancelled outgoing connection 2322 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2323 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2324 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2325 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2326 // reset state 2327 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2328 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2329 // get outgoing connection conn struct for direct connect 2330 conn = gap_get_outgoing_connection(); 2331 } 2332 2333 // outgoing le connection establishment is done 2334 if (conn){ 2335 // remove entry 2336 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2337 btstack_memory_hci_connection_free( conn ); 2338 } 2339 return; 2340 } 2341 #endif 2342 2343 // on success, both hosts receive connection complete event 2344 if (packet[6] == HCI_ROLE_MASTER){ 2345 #ifdef ENABLE_LE_CENTRAL 2346 // if we're master on an le connection, it was an outgoing connection and we're done with it 2347 // note: no hci_connection_t object exists yet for connect with whitelist 2348 if (hci_is_le_connection_type(addr_type)){ 2349 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2350 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2351 } 2352 #endif 2353 } else { 2354 #ifdef ENABLE_LE_PERIPHERAL 2355 // if we're slave, it was an incoming connection, advertisements have stopped 2356 hci_stack->le_advertisements_active = false; 2357 #endif 2358 } 2359 2360 // LE connections are auto-accepted, so just create a connection if there isn't one already 2361 if (!conn){ 2362 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2363 } 2364 2365 // no memory, sorry. 2366 if (!conn){ 2367 return; 2368 } 2369 2370 conn->state = OPEN; 2371 conn->role = packet[6]; 2372 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2373 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2374 2375 #ifdef ENABLE_LE_PERIPHERAL 2376 if (packet[6] == HCI_ROLE_SLAVE){ 2377 hci_update_advertisements_enabled_for_current_roles(); 2378 } 2379 #endif 2380 2381 // init unenhanced att bearer mtu 2382 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2383 conn->att_connection.mtu_exchanged = false; 2384 2385 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2386 2387 // restart timer 2388 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2389 // btstack_run_loop_add_timer(&conn->timeout); 2390 2391 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2392 2393 hci_emit_nr_connections_changed(); 2394 } 2395 #endif 2396 2397 #ifdef ENABLE_CLASSIC 2398 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){ 2399 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2400 // LEVEL_4 is tested by l2cap 2401 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2402 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2403 if (level >= LEVEL_3){ 2404 // MITM not possible without keyboard or display 2405 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2406 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2407 2408 // MITM possible if one side has keyboard and the other has keyboard or display 2409 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2410 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2411 2412 // MITM not possible if one side has only display and other side has no keyboard 2413 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2414 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2415 } 2416 // LEVEL 2 requires SSP, which is a given 2417 return true; 2418 } 2419 2420 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2421 uint16_t i; 2422 for (i=0; i < size ; i++){ 2423 if (data[i] != 0) { 2424 return false; 2425 } 2426 } 2427 return true; 2428 } 2429 2430 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2431 // assess security: LEVEL 4 requires SC 2432 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2433 log_info("Level 4 required, but SC not supported -> abort"); 2434 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2435 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2436 return; 2437 } 2438 2439 // assess security based on io capabilities 2440 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2441 // get requested security level 2442 gap_security_level_t requested_security_level = conn->requested_security_level; 2443 if (hci_stack->gap_secure_connections_only_mode){ 2444 requested_security_level = LEVEL_4; 2445 } 2446 2447 // responder: fully validate io caps of both sides as well as OOB data 2448 bool security_possible = false; 2449 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2450 2451 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2452 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2453 // so we merge the OOB data availability 2454 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2455 if (conn->classic_oob_c_192 != NULL){ 2456 have_oob_data |= 1; 2457 } 2458 if (conn->classic_oob_c_256 != NULL){ 2459 have_oob_data |= 2; 2460 } 2461 // for up to Level 3, either P-192 as well as P-256 will do 2462 // 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 2463 // if remote does not SC, we should not receive P-256 data either 2464 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2465 security_possible = true; 2466 } 2467 // for Level 4, P-256 is needed 2468 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2469 security_possible = true; 2470 } 2471 #endif 2472 2473 if (security_possible == false){ 2474 log_info("IOCap/OOB insufficient for level %u -> abort", conn->requested_security_level); 2475 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2476 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2477 return; 2478 } 2479 } else { 2480 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2481 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2482 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2483 log_info("Level 3+ required, but no input/output -> abort"); 2484 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2485 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2486 return; 2487 } 2488 #endif 2489 } 2490 2491 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2492 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2493 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2494 } else { 2495 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2496 } 2497 #endif 2498 } 2499 2500 #endif 2501 2502 static void event_handler(uint8_t *packet, uint16_t size){ 2503 2504 uint16_t event_length = packet[1]; 2505 2506 // assert packet is complete 2507 if (size != (event_length + 2u)){ 2508 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2509 return; 2510 } 2511 2512 bd_addr_type_t addr_type; 2513 hci_con_handle_t handle; 2514 hci_connection_t * conn; 2515 int i; 2516 int create_connection_cmd; 2517 2518 #ifdef ENABLE_CLASSIC 2519 hci_link_type_t link_type; 2520 bd_addr_t addr; 2521 #endif 2522 2523 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2524 2525 switch (hci_event_packet_get_type(packet)) { 2526 2527 case HCI_EVENT_COMMAND_COMPLETE: 2528 handle_command_complete_event(packet, size); 2529 break; 2530 2531 case HCI_EVENT_COMMAND_STATUS: 2532 // get num cmd packets - limit to 1 to reduce complexity 2533 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2534 2535 // check command status to detected failed outgoing connections 2536 create_connection_cmd = 0; 2537 #ifdef ENABLE_CLASSIC 2538 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2539 create_connection_cmd = 1; 2540 } 2541 #endif 2542 #ifdef ENABLE_LE_CENTRAL 2543 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2544 create_connection_cmd = 1; 2545 } 2546 #endif 2547 if (create_connection_cmd) { 2548 uint8_t status = hci_event_command_status_get_status(packet); 2549 addr_type = hci_stack->outgoing_addr_type; 2550 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2551 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); 2552 2553 // reset outgoing address info 2554 memset(hci_stack->outgoing_addr, 0, 6); 2555 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2556 2557 // on error 2558 if (status != ERROR_CODE_SUCCESS){ 2559 #ifdef ENABLE_LE_CENTRAL 2560 if (hci_is_le_connection_type(addr_type)){ 2561 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2562 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2563 } 2564 #endif 2565 // error => outgoing connection failed 2566 if (conn != NULL){ 2567 hci_handle_connection_failed(conn, status); 2568 } 2569 } 2570 } 2571 2572 #ifdef ENABLE_CLASSIC 2573 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2574 uint8_t status = hci_event_command_status_get_status(packet); 2575 log_info("command status (inquiry), status %x", status); 2576 if (status == ERROR_CODE_SUCCESS) { 2577 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2578 } else { 2579 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2580 } 2581 } 2582 #endif 2583 break; 2584 2585 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2586 if (size < 3) return; 2587 uint16_t num_handles = packet[2]; 2588 if (size != (3u + num_handles * 4u)) return; 2589 uint16_t offset = 3; 2590 for (i=0; i<num_handles;i++){ 2591 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2592 offset += 2u; 2593 uint16_t num_packets = little_endian_read_16(packet, offset); 2594 offset += 2u; 2595 2596 conn = hci_connection_for_handle(handle); 2597 if (!conn){ 2598 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2599 continue; 2600 } 2601 2602 if (conn->num_packets_sent >= num_packets){ 2603 conn->num_packets_sent -= num_packets; 2604 } else { 2605 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2606 conn->num_packets_sent = 0; 2607 } 2608 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2609 2610 #ifdef ENABLE_CLASSIC 2611 // For SCO, we do the can_send_now_check here 2612 hci_notify_if_sco_can_send_now(); 2613 #endif 2614 } 2615 break; 2616 } 2617 2618 #ifdef ENABLE_CLASSIC 2619 case HCI_EVENT_INQUIRY_COMPLETE: 2620 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2621 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2622 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2623 hci_emit_event(event, sizeof(event), 1); 2624 } 2625 break; 2626 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2627 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2628 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2629 } 2630 break; 2631 case HCI_EVENT_CONNECTION_REQUEST: 2632 reverse_bd_addr(&packet[2], addr); 2633 link_type = (hci_link_type_t) packet[11]; 2634 2635 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2636 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2637 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2638 bd_addr_copy(hci_stack->decline_addr, addr); 2639 break; 2640 } 2641 2642 if (hci_stack->gap_classic_accept_callback != NULL){ 2643 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2644 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2645 bd_addr_copy(hci_stack->decline_addr, addr); 2646 break; 2647 } 2648 } 2649 2650 // TODO: eval COD 8-10 2651 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2652 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2653 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2654 if (!conn) { 2655 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2656 } 2657 if (!conn) { 2658 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2659 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2660 bd_addr_copy(hci_stack->decline_addr, addr); 2661 break; 2662 } 2663 conn->role = HCI_ROLE_SLAVE; 2664 conn->state = RECEIVED_CONNECTION_REQUEST; 2665 // store info about eSCO 2666 if (link_type == HCI_LINK_TYPE_ESCO){ 2667 conn->remote_supported_features[0] |= 1; 2668 } 2669 hci_run(); 2670 break; 2671 2672 case HCI_EVENT_CONNECTION_COMPLETE: 2673 // Connection management 2674 reverse_bd_addr(&packet[5], addr); 2675 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2676 addr_type = BD_ADDR_TYPE_ACL; 2677 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2678 if (conn) { 2679 if (!packet[2]){ 2680 conn->state = OPEN; 2681 conn->con_handle = little_endian_read_16(packet, 3); 2682 2683 // queue get remote feature 2684 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2685 2686 // queue set supervision timeout if we're master 2687 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2688 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2689 } 2690 2691 // restart timer 2692 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2693 btstack_run_loop_add_timer(&conn->timeout); 2694 2695 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2696 2697 hci_emit_nr_connections_changed(); 2698 } else { 2699 // connection failed 2700 hci_handle_connection_failed(conn, packet[2]); 2701 } 2702 } 2703 break; 2704 2705 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2706 reverse_bd_addr(&packet[5], addr); 2707 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2708 if (packet[2]){ 2709 // connection failed 2710 break; 2711 } 2712 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2713 if (!conn) { 2714 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2715 } 2716 if (!conn) { 2717 break; 2718 } 2719 conn->state = OPEN; 2720 conn->con_handle = little_endian_read_16(packet, 3); 2721 2722 #ifdef ENABLE_SCO_OVER_HCI 2723 // update SCO 2724 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2725 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2726 } 2727 // trigger can send now 2728 if (hci_have_usb_transport()){ 2729 hci_stack->sco_can_send_now = true; 2730 } 2731 #endif 2732 #ifdef HAVE_SCO_TRANSPORT 2733 // configure sco transport 2734 if (hci_stack->sco_transport != NULL){ 2735 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2736 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2737 } 2738 #endif 2739 break; 2740 2741 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2742 handle = little_endian_read_16(packet, 3); 2743 conn = hci_connection_for_handle(handle); 2744 if (!conn) break; 2745 if (!packet[2]){ 2746 const uint8_t * features = &packet[5]; 2747 hci_handle_remote_features_page_0(conn, features); 2748 2749 // read extended features if possible 2750 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2751 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2752 break; 2753 } 2754 } 2755 hci_handle_remote_features_received(conn); 2756 break; 2757 2758 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2759 handle = little_endian_read_16(packet, 3); 2760 conn = hci_connection_for_handle(handle); 2761 if (!conn) break; 2762 // status = ok, page = 1 2763 if (!packet[2]) { 2764 uint8_t page_number = packet[5]; 2765 uint8_t maximum_page_number = packet[6]; 2766 const uint8_t * features = &packet[7]; 2767 bool done = false; 2768 switch (page_number){ 2769 case 1: 2770 hci_handle_remote_features_page_1(conn, features); 2771 if (maximum_page_number >= 2){ 2772 // get Secure Connections (Controller) from Page 2 if available 2773 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2774 } else { 2775 // otherwise, assume SC (Controller) == SC (Host) 2776 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2777 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2778 } 2779 done = true; 2780 } 2781 break; 2782 case 2: 2783 hci_handle_remote_features_page_2(conn, features); 2784 done = true; 2785 break; 2786 default: 2787 break; 2788 } 2789 if (!done) break; 2790 } 2791 hci_handle_remote_features_received(conn); 2792 break; 2793 2794 case HCI_EVENT_LINK_KEY_REQUEST: 2795 // request handled by hci_run() 2796 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2797 break; 2798 2799 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2800 hci_event_link_key_request_get_bd_addr(packet, addr); 2801 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2802 if (!conn) break; 2803 2804 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2805 2806 // CVE-2020-26555: ignore NULL link key 2807 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2808 if (btstack_is_null(&packet[8], 16)) break; 2809 2810 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2811 // Change Connection Encryption keeps link key type 2812 if (link_key_type != CHANGED_COMBINATION_KEY){ 2813 conn->link_key_type = link_key_type; 2814 } 2815 2816 // cache link key. link keys stored in little-endian format for legacy reasons 2817 memcpy(&conn->link_key, &packet[8], 16); 2818 2819 // only store link key: 2820 // - if bondable enabled 2821 if (hci_stack->bondable == false) break; 2822 // - if security level sufficient 2823 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2824 // - for SSP, also check if remote side requested bonding as well 2825 if (conn->link_key_type != COMBINATION_KEY){ 2826 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2827 if (!remote_bonding){ 2828 break; 2829 } 2830 } 2831 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2832 break; 2833 } 2834 2835 case HCI_EVENT_PIN_CODE_REQUEST: 2836 hci_event_pin_code_request_get_bd_addr(packet, addr); 2837 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2838 if (!conn) break; 2839 2840 hci_pairing_started(conn, false); 2841 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2842 if (!hci_stack->bondable ){ 2843 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2844 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2845 hci_run(); 2846 return; 2847 } 2848 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2849 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2850 log_info("Level 4 required, but SC not supported -> abort"); 2851 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2852 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2853 hci_run(); 2854 return; 2855 } 2856 break; 2857 2858 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2859 hci_event_io_capability_response_get_bd_addr(packet, addr); 2860 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2861 if (!conn) break; 2862 2863 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2864 hci_pairing_started(conn, true); 2865 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2866 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2867 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2868 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2869 #endif 2870 break; 2871 2872 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2873 hci_event_io_capability_response_get_bd_addr(packet, addr); 2874 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2875 if (!conn) break; 2876 2877 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2878 hci_connection_timestamp(conn); 2879 hci_pairing_started(conn, true); 2880 break; 2881 2882 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2883 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2884 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2885 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2886 if (!conn) break; 2887 2888 hci_connection_timestamp(conn); 2889 2890 hci_pairing_started(conn, true); 2891 2892 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2893 break; 2894 #endif 2895 2896 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2897 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2898 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2899 if (!conn) break; 2900 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2901 if (hci_stack->ssp_auto_accept){ 2902 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2903 }; 2904 } else { 2905 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2906 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2907 // don't forward event to app 2908 hci_run(); 2909 return; 2910 } 2911 break; 2912 2913 case HCI_EVENT_USER_PASSKEY_REQUEST: 2914 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2915 if (hci_stack->ssp_auto_accept){ 2916 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2917 }; 2918 break; 2919 2920 case HCI_EVENT_MODE_CHANGE: 2921 handle = hci_event_mode_change_get_handle(packet); 2922 conn = hci_connection_for_handle(handle); 2923 if (!conn) break; 2924 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2925 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2926 break; 2927 #endif 2928 2929 case HCI_EVENT_ENCRYPTION_CHANGE: 2930 handle = hci_event_encryption_change_get_connection_handle(packet); 2931 conn = hci_connection_for_handle(handle); 2932 if (!conn) break; 2933 if (hci_event_encryption_change_get_status(packet) == 0u) { 2934 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2935 if (encryption_enabled){ 2936 if (hci_is_le_connection(conn)){ 2937 // For LE, we accept connection as encrypted 2938 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2939 } 2940 #ifdef ENABLE_CLASSIC 2941 else { 2942 2943 // dedicated bonding: send result and disconnect 2944 if (conn->bonding_flags & BONDING_DEDICATED){ 2945 conn->bonding_flags &= ~BONDING_DEDICATED; 2946 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2947 conn->bonding_status = packet[2]; 2948 break; 2949 } 2950 2951 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2952 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2953 bool connected_uses_aes_ccm = encryption_enabled == 2; 2954 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2955 log_info("SC during pairing, but only E0 now -> abort"); 2956 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2957 break; 2958 } 2959 2960 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2961 if (connected_uses_aes_ccm){ 2962 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2963 } 2964 2965 #ifdef ENABLE_TESTING_SUPPORT 2966 // work around for issue with PTS dongle 2967 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2968 #endif 2969 2970 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2971 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2972 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2973 } else { 2974 // if not, pretend everything is perfect 2975 hci_handle_read_encryption_key_size_complete(conn, 16); 2976 } 2977 } 2978 #endif 2979 } else { 2980 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2981 } 2982 } 2983 2984 break; 2985 2986 #ifdef ENABLE_CLASSIC 2987 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2988 handle = hci_event_authentication_complete_get_connection_handle(packet); 2989 conn = hci_connection_for_handle(handle); 2990 if (!conn) break; 2991 2992 // clear authentication active flag 2993 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2994 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2995 2996 // authenticated only if auth status == 0 2997 if (hci_event_authentication_complete_get_status(packet) == 0){ 2998 // authenticated 2999 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3000 3001 // If not already encrypted, start encryption 3002 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3003 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3004 break; 3005 } 3006 } 3007 3008 // emit updated security level 3009 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3010 break; 3011 3012 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3013 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3014 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3015 if (!conn) break; 3016 3017 // treat successfully paired connection as authenticated 3018 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3019 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3020 } 3021 3022 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3023 break; 3024 #endif 3025 3026 // HCI_EVENT_DISCONNECTION_COMPLETE 3027 // has been split, to first notify stack before shutting connection down 3028 // see end of function, too. 3029 case HCI_EVENT_DISCONNECTION_COMPLETE: 3030 if (packet[2]) break; // status != 0 3031 handle = little_endian_read_16(packet, 3); 3032 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3033 if (hci_stack->acl_fragmentation_total_size > 0u) { 3034 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3035 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3036 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3037 hci_stack->acl_fragmentation_total_size = 0; 3038 hci_stack->acl_fragmentation_pos = 0; 3039 if (release_buffer){ 3040 hci_release_packet_buffer(); 3041 } 3042 } 3043 } 3044 3045 conn = hci_connection_for_handle(handle); 3046 if (!conn) break; 3047 #ifdef ENABLE_CLASSIC 3048 // pairing failed if it was ongoing 3049 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3050 #endif 3051 // mark connection for shutdown 3052 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3053 3054 // emit dedicatd bonding event 3055 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3056 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3057 } 3058 3059 #ifdef ENABLE_BLE 3060 #ifdef ENABLE_LE_PERIPHERAL 3061 // re-enable advertisements for le connections if active 3062 if (hci_is_le_connection(conn)){ 3063 hci_update_advertisements_enabled_for_current_roles(); 3064 } 3065 #endif 3066 #endif 3067 break; 3068 3069 case HCI_EVENT_HARDWARE_ERROR: 3070 log_error("Hardware Error: 0x%02x", packet[2]); 3071 if (hci_stack->hardware_error_callback){ 3072 (*hci_stack->hardware_error_callback)(packet[2]); 3073 } else { 3074 // if no special requests, just reboot stack 3075 hci_power_control_off(); 3076 hci_power_control_on(); 3077 } 3078 break; 3079 3080 #ifdef ENABLE_CLASSIC 3081 case HCI_EVENT_ROLE_CHANGE: 3082 if (packet[2]) break; // status != 0 3083 reverse_bd_addr(&packet[3], addr); 3084 addr_type = BD_ADDR_TYPE_ACL; 3085 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3086 if (!conn) break; 3087 conn->role = packet[9]; 3088 break; 3089 #endif 3090 3091 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3092 // release packet buffer only for asynchronous transport and if there are not further fragements 3093 if (hci_transport_synchronous()) { 3094 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3095 return; // instead of break: to avoid re-entering hci_run() 3096 } 3097 hci_stack->acl_fragmentation_tx_active = 0; 3098 if (hci_stack->acl_fragmentation_total_size) break; 3099 hci_release_packet_buffer(); 3100 3101 // L2CAP receives this event via the hci_emit_event below 3102 3103 #ifdef ENABLE_CLASSIC 3104 // For SCO, we do the can_send_now_check here 3105 hci_notify_if_sco_can_send_now(); 3106 #endif 3107 break; 3108 3109 #ifdef ENABLE_CLASSIC 3110 case HCI_EVENT_SCO_CAN_SEND_NOW: 3111 // For SCO, we do the can_send_now_check here 3112 hci_stack->sco_can_send_now = true; 3113 hci_notify_if_sco_can_send_now(); 3114 return; 3115 3116 // explode inquriy results for easier consumption 3117 case HCI_EVENT_INQUIRY_RESULT: 3118 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3119 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3120 gap_inquiry_explode(packet, size); 3121 break; 3122 #endif 3123 3124 #ifdef ENABLE_BLE 3125 case HCI_EVENT_LE_META: 3126 switch (packet[2]){ 3127 #ifdef ENABLE_LE_CENTRAL 3128 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3129 // log_info("advertising report received"); 3130 if (!hci_stack->le_scanning_enabled) break; 3131 le_handle_advertisement_report(packet, size); 3132 break; 3133 #endif 3134 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3135 event_handle_le_connection_complete(packet); 3136 break; 3137 3138 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3139 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3140 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3141 conn = hci_connection_for_handle(handle); 3142 if (!conn) break; 3143 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3144 break; 3145 3146 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3147 // connection 3148 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3149 conn = hci_connection_for_handle(handle); 3150 if (conn) { 3151 // read arguments 3152 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3153 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3154 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3155 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3156 3157 // validate against current connection parameter range 3158 le_connection_parameter_range_t existing_range; 3159 gap_get_connection_parameter_range(&existing_range); 3160 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3161 if (update_parameter){ 3162 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3163 conn->le_conn_interval_min = le_conn_interval_min; 3164 conn->le_conn_interval_max = le_conn_interval_max; 3165 conn->le_conn_latency = le_conn_latency; 3166 conn->le_supervision_timeout = le_supervision_timeout; 3167 } else { 3168 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3169 } 3170 } 3171 break; 3172 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3173 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3174 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3175 conn = hci_connection_for_handle(handle); 3176 if (conn) { 3177 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3178 } 3179 break; 3180 #endif 3181 default: 3182 break; 3183 } 3184 break; 3185 #endif 3186 case HCI_EVENT_VENDOR_SPECIFIC: 3187 // Vendor specific commands often create vendor specific event instead of num completed packets 3188 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3189 switch (hci_stack->manufacturer){ 3190 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3191 hci_stack->num_cmd_packets = 1; 3192 break; 3193 default: 3194 break; 3195 } 3196 break; 3197 default: 3198 break; 3199 } 3200 3201 handle_event_for_current_stack_state(packet, size); 3202 3203 // notify upper stack 3204 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3205 3206 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3207 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3208 handle = little_endian_read_16(packet, 3); 3209 hci_connection_t * aConn = hci_connection_for_handle(handle); 3210 // discard connection if app did not trigger a reconnect in the event handler 3211 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3212 hci_shutdown_connection(aConn); 3213 } 3214 } 3215 3216 // execute main loop 3217 hci_run(); 3218 } 3219 3220 #ifdef ENABLE_CLASSIC 3221 3222 #ifdef ENABLE_SCO_OVER_HCI 3223 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3224 static void sco_schedule_tx(hci_connection_t * conn); 3225 3226 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3227 log_debug("SCO TX Timeout"); 3228 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3229 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3230 if (!conn) return; 3231 3232 // trigger send 3233 conn->sco_tx_ready = 1; 3234 // extra packet if CVSD but SCO buffer is too short 3235 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3236 conn->sco_tx_ready++; 3237 } 3238 hci_notify_if_sco_can_send_now(); 3239 } 3240 3241 3242 #define SCO_TX_AFTER_RX_MS (6) 3243 3244 static void sco_schedule_tx(hci_connection_t * conn){ 3245 3246 uint32_t now = btstack_run_loop_get_time_ms(); 3247 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3248 int time_delta_ms = sco_tx_ms - now; 3249 3250 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3251 3252 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3253 btstack_run_loop_remove_timer(timer); 3254 btstack_run_loop_set_timer(timer, time_delta_ms); 3255 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3256 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3257 btstack_run_loop_add_timer(timer); 3258 } 3259 #endif 3260 3261 static void sco_handler(uint8_t * packet, uint16_t size){ 3262 // lookup connection struct 3263 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3264 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3265 if (!conn) return; 3266 3267 #ifdef ENABLE_SCO_OVER_HCI 3268 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3269 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3270 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3271 packet[2] = 0x3c; 3272 memmove(&packet[3], &packet[23], 63); 3273 size = 63; 3274 } 3275 } 3276 3277 if (hci_have_usb_transport()){ 3278 // Nothing to do 3279 } else { 3280 // 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); 3281 if (hci_stack->synchronous_flow_control_enabled == 0){ 3282 uint32_t now = btstack_run_loop_get_time_ms(); 3283 3284 if (!conn->sco_rx_valid){ 3285 // ignore first 10 packets 3286 conn->sco_rx_count++; 3287 // log_debug("sco rx count %u", conn->sco_rx_count); 3288 if (conn->sco_rx_count == 10) { 3289 // use first timestamp as is and pretent it just started 3290 conn->sco_rx_ms = now; 3291 conn->sco_rx_valid = 1; 3292 conn->sco_rx_count = 0; 3293 sco_schedule_tx(conn); 3294 } 3295 } else { 3296 // track expected arrival timme 3297 conn->sco_rx_count++; 3298 conn->sco_rx_ms += 7; 3299 int delta = (int32_t) (now - conn->sco_rx_ms); 3300 if (delta > 0){ 3301 conn->sco_rx_ms++; 3302 } 3303 // log_debug("sco rx %u", conn->sco_rx_ms); 3304 sco_schedule_tx(conn); 3305 } 3306 } 3307 } 3308 #endif 3309 3310 // deliver to app 3311 if (hci_stack->sco_packet_handler) { 3312 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3313 } 3314 3315 #ifdef HAVE_SCO_TRANSPORT 3316 // We can send one packet for each received packet 3317 conn->sco_tx_ready++; 3318 hci_notify_if_sco_can_send_now(); 3319 #endif 3320 3321 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3322 conn->num_packets_completed++; 3323 hci_stack->host_completed_packets = 1; 3324 hci_run(); 3325 #endif 3326 } 3327 #endif 3328 3329 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3330 hci_dump_packet(packet_type, 1, packet, size); 3331 switch (packet_type) { 3332 case HCI_EVENT_PACKET: 3333 event_handler(packet, size); 3334 break; 3335 case HCI_ACL_DATA_PACKET: 3336 acl_handler(packet, size); 3337 break; 3338 #ifdef ENABLE_CLASSIC 3339 case HCI_SCO_DATA_PACKET: 3340 sco_handler(packet, size); 3341 break; 3342 #endif 3343 default: 3344 break; 3345 } 3346 } 3347 3348 /** 3349 * @brief Add event packet handler. 3350 */ 3351 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3352 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3353 } 3354 3355 3356 /** Register HCI packet handlers */ 3357 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3358 hci_stack->acl_packet_handler = handler; 3359 } 3360 3361 #ifdef ENABLE_CLASSIC 3362 /** 3363 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3364 */ 3365 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3366 hci_stack->sco_packet_handler = handler; 3367 } 3368 #endif 3369 3370 static void hci_state_reset(void){ 3371 // no connections yet 3372 hci_stack->connections = NULL; 3373 3374 // keep discoverable/connectable as this has been requested by the client(s) 3375 // hci_stack->discoverable = 0; 3376 // hci_stack->connectable = 0; 3377 // hci_stack->bondable = 1; 3378 // hci_stack->own_addr_type = 0; 3379 3380 // buffer is free 3381 hci_stack->hci_packet_buffer_reserved = false; 3382 3383 // no pending cmds 3384 hci_stack->decline_reason = 0; 3385 hci_stack->new_scan_enable_value = 0xff; 3386 3387 hci_stack->secure_connections_active = false; 3388 3389 #ifdef ENABLE_CLASSIC 3390 hci_stack->new_page_scan_interval = 0xffff; 3391 hci_stack->new_page_scan_window = 0xffff; 3392 hci_stack->new_page_scan_type = 0xff; 3393 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3394 hci_stack->gap_tasks = 3395 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3396 GAP_TASK_SET_CLASS_OF_DEVICE | 3397 GAP_TASK_SET_LOCAL_NAME | 3398 GAP_TASK_SET_EIR_DATA; 3399 #endif 3400 3401 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3402 hci_stack->classic_read_local_oob_data = true; 3403 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3404 #endif 3405 3406 // LE 3407 #ifdef ENABLE_BLE 3408 memset(hci_stack->le_random_address, 0, 6); 3409 hci_stack->le_random_address_set = 0; 3410 #endif 3411 #ifdef ENABLE_LE_CENTRAL 3412 hci_stack->le_scanning_active = false; 3413 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3414 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3415 hci_stack->le_whitelist_capacity = 0; 3416 #endif 3417 #ifdef ENABLE_LE_PERIPHERAL 3418 hci_stack->le_advertisements_active = false; 3419 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3420 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3421 } 3422 if (hci_stack->le_advertisements_data != NULL){ 3423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3424 } 3425 #endif 3426 } 3427 3428 #ifdef ENABLE_CLASSIC 3429 /** 3430 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3431 */ 3432 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3433 // store and open remote device db 3434 hci_stack->link_key_db = link_key_db; 3435 if (hci_stack->link_key_db) { 3436 hci_stack->link_key_db->open(); 3437 } 3438 } 3439 #endif 3440 3441 void hci_init(const hci_transport_t *transport, const void *config){ 3442 3443 #ifdef HAVE_MALLOC 3444 if (!hci_stack) { 3445 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3446 } 3447 #else 3448 hci_stack = &hci_stack_static; 3449 #endif 3450 memset(hci_stack, 0, sizeof(hci_stack_t)); 3451 3452 // reference to use transport layer implementation 3453 hci_stack->hci_transport = transport; 3454 3455 // reference to used config 3456 hci_stack->config = config; 3457 3458 // setup pointer for outgoing packet buffer 3459 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3460 3461 // max acl payload size defined in config.h 3462 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3463 3464 // register packet handlers with transport 3465 transport->register_packet_handler(&packet_handler); 3466 3467 hci_stack->state = HCI_STATE_OFF; 3468 3469 // class of device 3470 hci_stack->class_of_device = 0x007a020c; // Smartphone 3471 3472 // bondable by default 3473 hci_stack->bondable = 1; 3474 3475 #ifdef ENABLE_CLASSIC 3476 // classic name 3477 hci_stack->local_name = default_classic_name; 3478 3479 // Master slave policy 3480 hci_stack->master_slave_policy = 1; 3481 3482 // Allow Role Switch 3483 hci_stack->allow_role_switch = 1; 3484 3485 // Default / minimum security level = 2 3486 hci_stack->gap_security_level = LEVEL_2; 3487 3488 // Default Security Mode 4 3489 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3490 3491 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3492 hci_stack->gap_required_encyrption_key_size = 7; 3493 3494 // Link Supervision Timeout 3495 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3496 3497 #endif 3498 3499 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3500 hci_stack->ssp_enable = 1; 3501 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3502 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3503 hci_stack->ssp_auto_accept = 1; 3504 3505 // Secure Connections: enable (requires support from Controller) 3506 hci_stack->secure_connections_enable = true; 3507 3508 // voice setting - signed 16 bit pcm data with CVSD over the air 3509 hci_stack->sco_voice_setting = 0x60; 3510 3511 #ifdef ENABLE_LE_CENTRAL 3512 // connection parameter to use for outgoing connections 3513 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3514 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3515 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3516 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3517 hci_stack->le_connection_latency = 4; // 4 3518 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3519 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3520 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3521 3522 // default LE Scanning 3523 hci_stack->le_scan_type = 0x1; // active 3524 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3525 hci_stack->le_scan_window = 0x30; // 30 ms 3526 #endif 3527 3528 #ifdef ENABLE_LE_PERIPHERAL 3529 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3530 #endif 3531 3532 // connection parameter range used to answer connection parameter update requests in l2cap 3533 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3534 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3535 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3536 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3537 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3538 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3539 3540 hci_state_reset(); 3541 } 3542 3543 void hci_deinit(void){ 3544 #ifdef HAVE_MALLOC 3545 if (hci_stack) { 3546 free(hci_stack); 3547 } 3548 #endif 3549 hci_stack = NULL; 3550 3551 #ifdef ENABLE_CLASSIC 3552 disable_l2cap_timeouts = 0; 3553 #endif 3554 } 3555 3556 /** 3557 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3558 */ 3559 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3560 hci_stack->chipset = chipset_driver; 3561 3562 // reset chipset driver - init is also called on power_up 3563 if (hci_stack->chipset && hci_stack->chipset->init){ 3564 hci_stack->chipset->init(hci_stack->config); 3565 } 3566 } 3567 3568 /** 3569 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3570 */ 3571 void hci_set_control(const btstack_control_t *hardware_control){ 3572 // references to used control implementation 3573 hci_stack->control = hardware_control; 3574 // init with transport config 3575 hardware_control->init(hci_stack->config); 3576 } 3577 3578 void hci_close(void){ 3579 3580 #ifdef ENABLE_CLASSIC 3581 // close remote device db 3582 if (hci_stack->link_key_db) { 3583 hci_stack->link_key_db->close(); 3584 } 3585 #endif 3586 3587 btstack_linked_list_iterator_t lit; 3588 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3589 while (btstack_linked_list_iterator_has_next(&lit)){ 3590 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3591 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3592 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3593 hci_shutdown_connection(connection); 3594 } 3595 3596 hci_power_control(HCI_POWER_OFF); 3597 3598 #ifdef HAVE_MALLOC 3599 free(hci_stack); 3600 #endif 3601 hci_stack = NULL; 3602 } 3603 3604 #ifdef HAVE_SCO_TRANSPORT 3605 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3606 hci_stack->sco_transport = sco_transport; 3607 sco_transport->register_packet_handler(&packet_handler); 3608 } 3609 #endif 3610 3611 #ifdef ENABLE_CLASSIC 3612 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3613 // validate ranage and set 3614 if (encryption_key_size < 7) return; 3615 if (encryption_key_size > 16) return; 3616 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3617 } 3618 3619 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3620 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3621 hci_stack->gap_security_mode = security_mode; 3622 return ERROR_CODE_SUCCESS; 3623 } else { 3624 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3625 } 3626 } 3627 3628 gap_security_mode_t gap_get_security_mode(void){ 3629 return hci_stack->gap_security_mode; 3630 } 3631 3632 void gap_set_security_level(gap_security_level_t security_level){ 3633 hci_stack->gap_security_level = security_level; 3634 } 3635 3636 gap_security_level_t gap_get_security_level(void){ 3637 if (hci_stack->gap_secure_connections_only_mode){ 3638 return LEVEL_4; 3639 } 3640 return hci_stack->gap_security_level; 3641 } 3642 3643 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3644 hci_stack->gap_minimal_service_security_level = security_level; 3645 } 3646 3647 void gap_set_secure_connections_only_mode(bool enable){ 3648 hci_stack->gap_secure_connections_only_mode = enable; 3649 } 3650 3651 bool gap_get_secure_connections_only_mode(void){ 3652 return hci_stack->gap_secure_connections_only_mode; 3653 } 3654 #endif 3655 3656 #ifdef ENABLE_CLASSIC 3657 void gap_set_class_of_device(uint32_t class_of_device){ 3658 hci_stack->class_of_device = class_of_device; 3659 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3660 hci_run(); 3661 } 3662 3663 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3664 hci_stack->default_link_policy_settings = default_link_policy_settings; 3665 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3666 hci_run(); 3667 } 3668 3669 void gap_set_allow_role_switch(bool allow_role_switch){ 3670 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3671 } 3672 3673 uint8_t hci_get_allow_role_switch(void){ 3674 return hci_stack->allow_role_switch; 3675 } 3676 3677 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3678 hci_stack->link_supervision_timeout = link_supervision_timeout; 3679 } 3680 3681 void hci_disable_l2cap_timeout_check(void){ 3682 disable_l2cap_timeouts = 1; 3683 } 3684 #endif 3685 3686 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3687 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3688 void hci_set_bd_addr(bd_addr_t addr){ 3689 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3690 hci_stack->custom_bd_addr_set = 1; 3691 } 3692 #endif 3693 3694 // State-Module-Driver overview 3695 // state module low-level 3696 // HCI_STATE_OFF off close 3697 // HCI_STATE_INITIALIZING, on open 3698 // HCI_STATE_WORKING, on open 3699 // HCI_STATE_HALTING, on open 3700 // HCI_STATE_SLEEPING, off/sleep close 3701 // HCI_STATE_FALLING_ASLEEP on open 3702 3703 static int hci_power_control_on(void){ 3704 3705 // power on 3706 int err = 0; 3707 if (hci_stack->control && hci_stack->control->on){ 3708 err = (*hci_stack->control->on)(); 3709 } 3710 if (err){ 3711 log_error( "POWER_ON failed"); 3712 hci_emit_hci_open_failed(); 3713 return err; 3714 } 3715 3716 // int chipset driver 3717 if (hci_stack->chipset && hci_stack->chipset->init){ 3718 hci_stack->chipset->init(hci_stack->config); 3719 } 3720 3721 // init transport 3722 if (hci_stack->hci_transport->init){ 3723 hci_stack->hci_transport->init(hci_stack->config); 3724 } 3725 3726 // open transport 3727 err = hci_stack->hci_transport->open(); 3728 if (err){ 3729 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3730 if (hci_stack->control && hci_stack->control->off){ 3731 (*hci_stack->control->off)(); 3732 } 3733 hci_emit_hci_open_failed(); 3734 return err; 3735 } 3736 return 0; 3737 } 3738 3739 static void hci_power_control_off(void){ 3740 3741 log_info("hci_power_control_off"); 3742 3743 // close low-level device 3744 hci_stack->hci_transport->close(); 3745 3746 log_info("hci_power_control_off - hci_transport closed"); 3747 3748 // power off 3749 if (hci_stack->control && hci_stack->control->off){ 3750 (*hci_stack->control->off)(); 3751 } 3752 3753 log_info("hci_power_control_off - control closed"); 3754 3755 hci_stack->state = HCI_STATE_OFF; 3756 } 3757 3758 static void hci_power_control_sleep(void){ 3759 3760 log_info("hci_power_control_sleep"); 3761 3762 #if 0 3763 // don't close serial port during sleep 3764 3765 // close low-level device 3766 hci_stack->hci_transport->close(hci_stack->config); 3767 #endif 3768 3769 // sleep mode 3770 if (hci_stack->control && hci_stack->control->sleep){ 3771 (*hci_stack->control->sleep)(); 3772 } 3773 3774 hci_stack->state = HCI_STATE_SLEEPING; 3775 } 3776 3777 static int hci_power_control_wake(void){ 3778 3779 log_info("hci_power_control_wake"); 3780 3781 // wake on 3782 if (hci_stack->control && hci_stack->control->wake){ 3783 (*hci_stack->control->wake)(); 3784 } 3785 3786 #if 0 3787 // open low-level device 3788 int err = hci_stack->hci_transport->open(hci_stack->config); 3789 if (err){ 3790 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3791 if (hci_stack->control && hci_stack->control->off){ 3792 (*hci_stack->control->off)(); 3793 } 3794 hci_emit_hci_open_failed(); 3795 return err; 3796 } 3797 #endif 3798 3799 return 0; 3800 } 3801 3802 static void hci_power_transition_to_initializing(void){ 3803 // set up state machine 3804 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3805 hci_stack->hci_packet_buffer_reserved = false; 3806 hci_stack->state = HCI_STATE_INITIALIZING; 3807 hci_stack->substate = HCI_INIT_SEND_RESET; 3808 } 3809 3810 // returns error 3811 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3812 int err; 3813 switch (power_mode){ 3814 case HCI_POWER_ON: 3815 err = hci_power_control_on(); 3816 if (err != 0) { 3817 log_error("hci_power_control_on() error %d", err); 3818 return err; 3819 } 3820 hci_power_transition_to_initializing(); 3821 break; 3822 case HCI_POWER_OFF: 3823 // do nothing 3824 break; 3825 case HCI_POWER_SLEEP: 3826 // do nothing (with SLEEP == OFF) 3827 break; 3828 default: 3829 btstack_assert(false); 3830 break; 3831 } 3832 return ERROR_CODE_SUCCESS; 3833 } 3834 3835 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3836 switch (power_mode){ 3837 case HCI_POWER_ON: 3838 // do nothing 3839 break; 3840 case HCI_POWER_OFF: 3841 // no connections yet, just turn it off 3842 hci_power_control_off(); 3843 break; 3844 case HCI_POWER_SLEEP: 3845 // no connections yet, just turn it off 3846 hci_power_control_sleep(); 3847 break; 3848 default: 3849 btstack_assert(false); 3850 break; 3851 } 3852 return ERROR_CODE_SUCCESS; 3853 } 3854 3855 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3856 switch (power_mode){ 3857 case HCI_POWER_ON: 3858 // do nothing 3859 break; 3860 case HCI_POWER_OFF: 3861 // see hci_run 3862 hci_stack->state = HCI_STATE_HALTING; 3863 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3864 break; 3865 case HCI_POWER_SLEEP: 3866 // see hci_run 3867 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3868 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3869 break; 3870 default: 3871 btstack_assert(false); 3872 break; 3873 } 3874 return ERROR_CODE_SUCCESS; 3875 } 3876 3877 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3878 switch (power_mode){ 3879 case HCI_POWER_ON: 3880 hci_power_transition_to_initializing(); 3881 break; 3882 case HCI_POWER_OFF: 3883 // do nothing 3884 break; 3885 case HCI_POWER_SLEEP: 3886 // see hci_run 3887 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3888 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3889 break; 3890 default: 3891 btstack_assert(false); 3892 break; 3893 } 3894 return ERROR_CODE_SUCCESS; 3895 } 3896 3897 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3898 switch (power_mode){ 3899 case HCI_POWER_ON: 3900 3901 #ifdef HAVE_PLATFORM_IPHONE_OS 3902 // nothing to do, if H4 supports power management 3903 if (btstack_control_iphone_power_management_enabled()){ 3904 hci_stack->state = HCI_STATE_INITIALIZING; 3905 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3906 break; 3907 } 3908 #endif 3909 hci_power_transition_to_initializing(); 3910 break; 3911 case HCI_POWER_OFF: 3912 // see hci_run 3913 hci_stack->state = HCI_STATE_HALTING; 3914 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3915 break; 3916 case HCI_POWER_SLEEP: 3917 // do nothing 3918 break; 3919 default: 3920 btstack_assert(false); 3921 break; 3922 } 3923 return ERROR_CODE_SUCCESS; 3924 } 3925 3926 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3927 int err; 3928 switch (power_mode){ 3929 case HCI_POWER_ON: 3930 #ifdef HAVE_PLATFORM_IPHONE_OS 3931 // nothing to do, if H4 supports power management 3932 if (btstack_control_iphone_power_management_enabled()){ 3933 hci_stack->state = HCI_STATE_INITIALIZING; 3934 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3935 hci_update_scan_enable(); 3936 break; 3937 } 3938 #endif 3939 err = hci_power_control_wake(); 3940 if (err) return err; 3941 hci_power_transition_to_initializing(); 3942 break; 3943 case HCI_POWER_OFF: 3944 hci_stack->state = HCI_STATE_HALTING; 3945 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3946 break; 3947 case HCI_POWER_SLEEP: 3948 // do nothing 3949 break; 3950 default: 3951 btstack_assert(false); 3952 break; 3953 } 3954 return ERROR_CODE_SUCCESS; 3955 } 3956 3957 int hci_power_control(HCI_POWER_MODE power_mode){ 3958 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3959 int err = 0; 3960 switch (hci_stack->state){ 3961 case HCI_STATE_OFF: 3962 err = hci_power_control_state_off(power_mode); 3963 break; 3964 case HCI_STATE_INITIALIZING: 3965 err = hci_power_control_state_initializing(power_mode); 3966 break; 3967 case HCI_STATE_WORKING: 3968 err = hci_power_control_state_working(power_mode); 3969 break; 3970 case HCI_STATE_HALTING: 3971 err = hci_power_control_state_halting(power_mode); 3972 break; 3973 case HCI_STATE_FALLING_ASLEEP: 3974 err = hci_power_control_state_falling_asleep(power_mode); 3975 break; 3976 case HCI_STATE_SLEEPING: 3977 err = hci_power_control_state_sleeping(power_mode); 3978 break; 3979 default: 3980 btstack_assert(false); 3981 break; 3982 } 3983 if (err != 0){ 3984 return err; 3985 } 3986 3987 // create internal event 3988 hci_emit_state(); 3989 3990 // trigger next/first action 3991 hci_run(); 3992 3993 return 0; 3994 } 3995 3996 3997 #ifdef ENABLE_CLASSIC 3998 3999 static void hci_update_scan_enable(void){ 4000 // 2 = page scan, 1 = inq scan 4001 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4002 hci_run(); 4003 } 4004 4005 void gap_discoverable_control(uint8_t enable){ 4006 if (enable) enable = 1; // normalize argument 4007 4008 if (hci_stack->discoverable == enable){ 4009 hci_emit_discoverable_enabled(hci_stack->discoverable); 4010 return; 4011 } 4012 4013 hci_stack->discoverable = enable; 4014 hci_update_scan_enable(); 4015 } 4016 4017 void gap_connectable_control(uint8_t enable){ 4018 if (enable) enable = 1; // normalize argument 4019 4020 // don't emit event 4021 if (hci_stack->connectable == enable) return; 4022 4023 hci_stack->connectable = enable; 4024 hci_update_scan_enable(); 4025 } 4026 #endif 4027 4028 void gap_local_bd_addr(bd_addr_t address_buffer){ 4029 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4030 } 4031 4032 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4033 static void hci_host_num_completed_packets(void){ 4034 4035 // create packet manually as arrays are not supported and num_commands should not get reduced 4036 hci_reserve_packet_buffer(); 4037 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4038 4039 uint16_t size = 0; 4040 uint16_t num_handles = 0; 4041 packet[size++] = 0x35; 4042 packet[size++] = 0x0c; 4043 size++; // skip param len 4044 size++; // skip num handles 4045 4046 // add { handle, packets } entries 4047 btstack_linked_item_t * it; 4048 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4049 hci_connection_t * connection = (hci_connection_t *) it; 4050 if (connection->num_packets_completed){ 4051 little_endian_store_16(packet, size, connection->con_handle); 4052 size += 2; 4053 little_endian_store_16(packet, size, connection->num_packets_completed); 4054 size += 2; 4055 // 4056 num_handles++; 4057 connection->num_packets_completed = 0; 4058 } 4059 } 4060 4061 packet[2] = size - 3; 4062 packet[3] = num_handles; 4063 4064 hci_stack->host_completed_packets = 0; 4065 4066 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4067 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4068 4069 // release packet buffer for synchronous transport implementations 4070 if (hci_transport_synchronous()){ 4071 hci_release_packet_buffer(); 4072 hci_emit_transport_packet_sent(); 4073 } 4074 } 4075 #endif 4076 4077 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4078 UNUSED(ds); 4079 hci_stack->substate = HCI_HALTING_CLOSE; 4080 // allow packet handlers to defer final shutdown 4081 hci_emit_state(); 4082 hci_run(); 4083 } 4084 4085 static bool hci_run_acl_fragments(void){ 4086 if (hci_stack->acl_fragmentation_total_size > 0u) { 4087 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4088 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4089 if (connection) { 4090 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4091 hci_send_acl_packet_fragments(connection); 4092 return true; 4093 } 4094 } else { 4095 // connection gone -> discard further fragments 4096 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4097 hci_stack->acl_fragmentation_total_size = 0; 4098 hci_stack->acl_fragmentation_pos = 0; 4099 } 4100 } 4101 return false; 4102 } 4103 4104 #ifdef ENABLE_CLASSIC 4105 static bool hci_run_general_gap_classic(void){ 4106 4107 // assert stack is working and classic is active 4108 if (hci_classic_supported() == false) return false; 4109 if (hci_stack->state != HCI_STATE_WORKING) return false; 4110 4111 // decline incoming connections 4112 if (hci_stack->decline_reason){ 4113 uint8_t reason = hci_stack->decline_reason; 4114 hci_stack->decline_reason = 0; 4115 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4116 return true; 4117 } 4118 4119 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4120 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4121 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4122 return true; 4123 } 4124 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4125 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4126 gap_run_set_local_name(); 4127 return true; 4128 } 4129 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4130 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4131 gap_run_set_eir_data(); 4132 return true; 4133 } 4134 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4135 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4136 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4137 return true; 4138 } 4139 // write page scan activity 4140 if (hci_stack->new_page_scan_interval != 0xffff) { 4141 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4142 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4143 hci_stack->new_page_scan_interval = 0xffff; 4144 hci_stack->new_page_scan_window = 0xffff; 4145 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4146 return true; 4147 } 4148 // write page scan type 4149 if (hci_stack->new_page_scan_type != 0xff) { 4150 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4151 hci_stack->new_page_scan_type = 0xff; 4152 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4153 return true; 4154 } 4155 // send scan enable 4156 if (hci_stack->new_scan_enable_value != 0xff) { 4157 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4158 hci_stack->new_scan_enable_value = 0xff; 4159 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4160 return true; 4161 } 4162 4163 // start/stop inquiry 4164 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4165 uint8_t duration = hci_stack->inquiry_state; 4166 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4167 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4168 return true; 4169 } 4170 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4171 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4172 hci_send_cmd(&hci_inquiry_cancel); 4173 return true; 4174 } 4175 // remote name request 4176 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4177 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4178 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4179 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4180 return true; 4181 } 4182 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4183 // Local OOB data 4184 if (hci_stack->classic_read_local_oob_data){ 4185 hci_stack->classic_read_local_oob_data = false; 4186 if (hci_stack->local_supported_commands[1] & 0x10u){ 4187 hci_send_cmd(&hci_read_local_extended_oob_data); 4188 } else { 4189 hci_send_cmd(&hci_read_local_oob_data); 4190 } 4191 } 4192 #endif 4193 // pairing 4194 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4195 uint8_t state = hci_stack->gap_pairing_state; 4196 uint8_t pin_code[16]; 4197 switch (state){ 4198 case GAP_PAIRING_STATE_SEND_PIN: 4199 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4200 memset(pin_code, 0, 16); 4201 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4202 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4203 break; 4204 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4205 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4206 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4207 break; 4208 case GAP_PAIRING_STATE_SEND_PASSKEY: 4209 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4210 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4211 break; 4212 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4213 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4214 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4215 break; 4216 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4217 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4218 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4219 break; 4220 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4221 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4222 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4223 break; 4224 default: 4225 break; 4226 } 4227 return true; 4228 } 4229 return false; 4230 } 4231 #endif 4232 4233 #ifdef ENABLE_BLE 4234 static bool hci_run_general_gap_le(void){ 4235 4236 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4237 4238 if (hci_stack->state != HCI_STATE_WORKING) return false; 4239 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4240 4241 4242 // Phase 1: collect what to stop 4243 4244 bool scanning_stop = false; 4245 bool connecting_stop = false; 4246 bool advertising_stop = false; 4247 4248 #ifndef ENABLE_LE_CENTRAL 4249 UNUSED(scanning_stop); 4250 UNUSED(connecting_stop); 4251 #endif 4252 #ifndef ENABLE_LE_PERIPHERAL 4253 UNUSED(advertising_stop); 4254 #endif 4255 4256 // check if whitelist needs modification 4257 bool whitelist_modification_pending = false; 4258 btstack_linked_list_iterator_t lit; 4259 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4260 while (btstack_linked_list_iterator_has_next(&lit)){ 4261 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4262 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4263 whitelist_modification_pending = true; 4264 break; 4265 } 4266 } 4267 // check if resolving list needs modification 4268 bool resolving_list_modification_pending = false; 4269 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4270 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4271 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4272 resolving_list_modification_pending = true; 4273 } 4274 #endif 4275 4276 #ifdef ENABLE_LE_CENTRAL 4277 // scanning control 4278 if (hci_stack->le_scanning_active) { 4279 // stop if: 4280 // - parameter change required 4281 // - it's disabled 4282 // - whitelist change required but used for scanning 4283 // - resolving list modified 4284 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4285 if ((hci_stack->le_scanning_param_update) || 4286 !hci_stack->le_scanning_enabled || 4287 scanning_uses_whitelist || 4288 resolving_list_modification_pending){ 4289 4290 scanning_stop = true; 4291 } 4292 } 4293 #endif 4294 4295 #ifdef ENABLE_LE_CENTRAL 4296 // connecting control 4297 bool connecting_with_whitelist; 4298 switch (hci_stack->le_connecting_state){ 4299 case LE_CONNECTING_DIRECT: 4300 case LE_CONNECTING_WHITELIST: 4301 // stop connecting if: 4302 // - connecting uses white and whitelist modification pending 4303 // - if it got disabled 4304 // - resolving list modified 4305 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4306 if ((connecting_with_whitelist && whitelist_modification_pending) || 4307 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4308 resolving_list_modification_pending) { 4309 4310 connecting_stop = true; 4311 } 4312 break; 4313 default: 4314 break; 4315 } 4316 #endif 4317 4318 #ifdef ENABLE_LE_PERIPHERAL 4319 // le advertisement control 4320 if (hci_stack->le_advertisements_active){ 4321 // stop if: 4322 // - parameter change required 4323 // - it's disabled 4324 // - whitelist change required but used for advertisement filter policy 4325 // - resolving list modified 4326 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4327 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4328 if (advertising_change || 4329 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4330 (advertising_uses_whitelist & whitelist_modification_pending) || 4331 resolving_list_modification_pending) { 4332 4333 advertising_stop = true; 4334 } 4335 } 4336 #endif 4337 4338 4339 // Phase 2: stop everything that should be off during modifications 4340 4341 #ifdef ENABLE_LE_CENTRAL 4342 if (scanning_stop){ 4343 hci_stack->le_scanning_active = false; 4344 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4345 return true; 4346 } 4347 #endif 4348 4349 #ifdef ENABLE_LE_CENTRAL 4350 if (connecting_stop){ 4351 hci_send_cmd(&hci_le_create_connection_cancel); 4352 return true; 4353 } 4354 #endif 4355 4356 #ifdef ENABLE_LE_PERIPHERAL 4357 if (advertising_stop){ 4358 hci_stack->le_advertisements_active = false; 4359 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4360 return true; 4361 } 4362 #endif 4363 4364 // Phase 3: modify 4365 4366 #ifdef ENABLE_LE_CENTRAL 4367 if (hci_stack->le_scanning_param_update){ 4368 hci_stack->le_scanning_param_update = false; 4369 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4370 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4371 return true; 4372 } 4373 #endif 4374 4375 #ifdef ENABLE_LE_PERIPHERAL 4376 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4377 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4378 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4379 hci_send_cmd(&hci_le_set_advertising_parameters, 4380 hci_stack->le_advertisements_interval_min, 4381 hci_stack->le_advertisements_interval_max, 4382 hci_stack->le_advertisements_type, 4383 hci_stack->le_advertisements_own_addr_type, 4384 hci_stack->le_advertisements_direct_address_type, 4385 hci_stack->le_advertisements_direct_address, 4386 hci_stack->le_advertisements_channel_map, 4387 hci_stack->le_advertisements_filter_policy); 4388 return true; 4389 } 4390 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4391 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4392 uint8_t adv_data_clean[31]; 4393 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4394 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4395 hci_stack->le_advertisements_data_len); 4396 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4397 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4398 return true; 4399 } 4400 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4401 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4402 uint8_t scan_data_clean[31]; 4403 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4404 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4405 hci_stack->le_scan_response_data_len); 4406 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4407 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4408 return true; 4409 } 4410 #endif 4411 4412 4413 #ifdef ENABLE_LE_CENTRAL 4414 // if connect with whitelist was active and is not cancelled yet, wait until next time 4415 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4416 #endif 4417 4418 // LE Whitelist Management 4419 if (whitelist_modification_pending){ 4420 // add/remove entries 4421 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4422 while (btstack_linked_list_iterator_has_next(&lit)){ 4423 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4424 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4425 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4426 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4427 return true; 4428 } 4429 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4430 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4431 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4432 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4433 return true; 4434 } 4435 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4436 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4437 btstack_memory_whitelist_entry_free(entry); 4438 } 4439 } 4440 } 4441 4442 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4443 // LE Resolving List Management 4444 if (resolving_list_supported) { 4445 uint16_t i; 4446 switch (hci_stack->le_resolving_list_state) { 4447 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4448 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4449 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4450 return true; 4451 case LE_RESOLVING_LIST_READ_SIZE: 4452 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4453 hci_send_cmd(&hci_le_read_resolving_list_size); 4454 return true; 4455 case LE_RESOLVING_LIST_SEND_CLEAR: 4456 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4457 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4458 sizeof(hci_stack->le_resolving_list_add_entries)); 4459 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4460 sizeof(hci_stack->le_resolving_list_remove_entries)); 4461 hci_send_cmd(&hci_le_clear_resolving_list); 4462 return true; 4463 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4464 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4465 uint8_t offset = i >> 3; 4466 uint8_t mask = 1 << (i & 7); 4467 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4468 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4469 bd_addr_t peer_identity_addreses; 4470 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4471 sm_key_t peer_irk; 4472 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4473 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4474 4475 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4476 // trigger whitelist entry 'update' (work around for controller bug) 4477 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4478 while (btstack_linked_list_iterator_has_next(&lit)) { 4479 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4480 if (entry->address_type != peer_identity_addr_type) continue; 4481 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4482 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4483 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4484 } 4485 #endif 4486 4487 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4488 peer_identity_addreses); 4489 return true; 4490 } 4491 4492 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4493 4494 /* fall through */ 4495 4496 case LE_RESOLVING_LIST_ADD_ENTRIES: 4497 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4498 uint8_t offset = i >> 3; 4499 uint8_t mask = 1 << (i & 7); 4500 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4501 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4502 bd_addr_t peer_identity_addreses; 4503 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4504 sm_key_t peer_irk; 4505 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4506 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4507 const uint8_t *local_irk = gap_get_persistent_irk(); 4508 // command uses format specifier 'P' that stores 16-byte value without flip 4509 uint8_t local_irk_flipped[16]; 4510 uint8_t peer_irk_flipped[16]; 4511 reverse_128(local_irk, local_irk_flipped); 4512 reverse_128(peer_irk, peer_irk_flipped); 4513 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4514 peer_irk_flipped, local_irk_flipped); 4515 return true; 4516 } 4517 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4518 break; 4519 4520 default: 4521 break; 4522 } 4523 } 4524 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4525 #endif 4526 4527 // Phase 4: restore state 4528 4529 #ifdef ENABLE_LE_CENTRAL 4530 // re-start scanning 4531 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4532 hci_stack->le_scanning_active = true; 4533 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4534 return true; 4535 } 4536 #endif 4537 4538 #ifdef ENABLE_LE_CENTRAL 4539 // re-start connecting 4540 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4541 bd_addr_t null_addr; 4542 memset(null_addr, 0, 6); 4543 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4544 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4545 hci_send_cmd(&hci_le_create_connection, 4546 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4547 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4548 1, // use whitelist 4549 0, // peer address type 4550 null_addr, // peer bd addr 4551 hci_stack->le_connection_own_addr_type, // our addr type: 4552 hci_stack->le_connection_interval_min, // conn interval min 4553 hci_stack->le_connection_interval_max, // conn interval max 4554 hci_stack->le_connection_latency, // conn latency 4555 hci_stack->le_supervision_timeout, // conn latency 4556 hci_stack->le_minimum_ce_length, // min ce length 4557 hci_stack->le_maximum_ce_length // max ce length 4558 ); 4559 return true; 4560 } 4561 #endif 4562 4563 #ifdef ENABLE_LE_PERIPHERAL 4564 // re-start advertising 4565 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4566 // check if advertisements should be enabled given 4567 hci_stack->le_advertisements_active = true; 4568 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4569 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4570 return true; 4571 } 4572 #endif 4573 4574 return false; 4575 } 4576 #endif 4577 4578 static bool hci_run_general_pending_commands(void){ 4579 btstack_linked_item_t * it; 4580 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4581 hci_connection_t * connection = (hci_connection_t *) it; 4582 4583 switch(connection->state){ 4584 case SEND_CREATE_CONNECTION: 4585 switch(connection->address_type){ 4586 #ifdef ENABLE_CLASSIC 4587 case BD_ADDR_TYPE_ACL: 4588 log_info("sending hci_create_connection"); 4589 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4590 break; 4591 #endif 4592 default: 4593 #ifdef ENABLE_BLE 4594 #ifdef ENABLE_LE_CENTRAL 4595 log_info("sending hci_le_create_connection"); 4596 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4597 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4598 hci_send_cmd(&hci_le_create_connection, 4599 hci_stack->le_connection_scan_interval, // conn scan interval 4600 hci_stack->le_connection_scan_window, // conn scan windows 4601 0, // don't use whitelist 4602 connection->address_type, // peer address type 4603 connection->address, // peer bd addr 4604 hci_stack->le_connection_own_addr_type, // our addr type: 4605 hci_stack->le_connection_interval_min, // conn interval min 4606 hci_stack->le_connection_interval_max, // conn interval max 4607 hci_stack->le_connection_latency, // conn latency 4608 hci_stack->le_supervision_timeout, // conn latency 4609 hci_stack->le_minimum_ce_length, // min ce length 4610 hci_stack->le_maximum_ce_length // max ce length 4611 ); 4612 connection->state = SENT_CREATE_CONNECTION; 4613 #endif 4614 #endif 4615 break; 4616 } 4617 return true; 4618 4619 #ifdef ENABLE_CLASSIC 4620 case RECEIVED_CONNECTION_REQUEST: 4621 connection->role = HCI_ROLE_SLAVE; 4622 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4623 log_info("sending hci_accept_connection_request"); 4624 connection->state = ACCEPTED_CONNECTION_REQUEST; 4625 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4626 } 4627 return true; 4628 #endif 4629 4630 #ifdef ENABLE_BLE 4631 #ifdef ENABLE_LE_CENTRAL 4632 case SEND_CANCEL_CONNECTION: 4633 connection->state = SENT_CANCEL_CONNECTION; 4634 hci_send_cmd(&hci_le_create_connection_cancel); 4635 return true; 4636 #endif 4637 #endif 4638 case SEND_DISCONNECT: 4639 connection->state = SENT_DISCONNECT; 4640 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4641 return true; 4642 4643 default: 4644 break; 4645 } 4646 4647 // no further commands if connection is about to get shut down 4648 if (connection->state == SENT_DISCONNECT) continue; 4649 4650 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4651 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4652 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4653 return true; 4654 } 4655 4656 #ifdef ENABLE_CLASSIC 4657 4658 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4659 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4660 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4661 return true; 4662 } 4663 4664 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4665 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4666 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4667 return true; 4668 } 4669 4670 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4671 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4672 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4673 return true; 4674 } 4675 4676 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4677 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4678 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4679 return true; 4680 } 4681 4682 // Handling link key request requires remote supported features 4683 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4684 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4686 4687 // lookup link key using cached key first 4688 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4689 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4690 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4691 } 4692 4693 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4694 if (have_link_key && security_level_sufficient){ 4695 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4696 } else { 4697 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4698 } 4699 return true; 4700 } 4701 4702 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4703 log_info("denying to pin request"); 4704 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4705 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4706 return true; 4707 } 4708 4709 // security assessment requires remote features 4710 if (((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4711 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4712 hci_ssp_assess_security_on_io_cap_request(connection); 4713 // 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 4714 } 4715 4716 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4717 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4718 // set authentication requirements: 4719 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4720 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4721 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4722 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4723 authreq |= 1; 4724 } 4725 bool bonding = hci_stack->bondable; 4726 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4727 // if we have received IO Cap Response, we're in responder role 4728 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4729 if (bonding && !remote_bonding){ 4730 log_info("Remote not bonding, dropping local flag"); 4731 bonding = false; 4732 } 4733 } 4734 if (bonding){ 4735 if (connection->bonding_flags & BONDING_DEDICATED){ 4736 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4737 } else { 4738 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4739 } 4740 } 4741 uint8_t have_oob_data = 0; 4742 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4743 if (connection->classic_oob_c_192 != NULL){ 4744 have_oob_data |= 1; 4745 } 4746 if (connection->classic_oob_c_256 != NULL){ 4747 have_oob_data |= 2; 4748 } 4749 #endif 4750 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4751 return true; 4752 } 4753 4754 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4755 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4756 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4757 return true; 4758 } 4759 4760 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4761 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4762 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4763 const uint8_t zero[16] = { 0 }; 4764 const uint8_t * r_192 = zero; 4765 const uint8_t * c_192 = zero; 4766 const uint8_t * r_256 = zero; 4767 const uint8_t * c_256 = zero; 4768 // verify P-256 OOB 4769 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4770 c_256 = connection->classic_oob_c_256; 4771 if (connection->classic_oob_r_256 != NULL) { 4772 r_256 = connection->classic_oob_r_256; 4773 } 4774 } 4775 // verify P-192 OOB 4776 if ((connection->classic_oob_c_192 != NULL)) { 4777 c_192 = connection->classic_oob_c_192; 4778 if (connection->classic_oob_r_192 != NULL) { 4779 r_192 = connection->classic_oob_r_192; 4780 } 4781 } 4782 4783 // assess security 4784 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4785 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4786 if (need_level_4 && !can_reach_level_4){ 4787 log_info("Level 4 required, but not possible -> abort"); 4788 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4789 // send oob negative reply 4790 c_256 = NULL; 4791 c_192 = NULL; 4792 } 4793 4794 // Reply 4795 if (c_256 != zero) { 4796 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4797 } else if (c_192 != zero){ 4798 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4799 } else { 4800 hci_stack->classic_oob_con_handle = connection->con_handle; 4801 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4802 } 4803 return true; 4804 } 4805 #endif 4806 4807 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4808 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4809 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4810 return true; 4811 } 4812 4813 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4814 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4815 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4816 return true; 4817 } 4818 4819 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4820 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4821 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4822 return true; 4823 } 4824 4825 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4826 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4827 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4828 connection->state = SENT_DISCONNECT; 4829 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4830 return true; 4831 } 4832 4833 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4834 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4835 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4836 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4837 return true; 4838 } 4839 4840 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4841 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4842 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4843 return true; 4844 } 4845 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4846 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4847 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4848 return true; 4849 } 4850 #endif 4851 4852 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4853 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4854 #ifdef ENABLE_CLASSIC 4855 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4856 #endif 4857 if (connection->state != SENT_DISCONNECT){ 4858 connection->state = SENT_DISCONNECT; 4859 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4860 return true; 4861 } 4862 } 4863 4864 #ifdef ENABLE_CLASSIC 4865 uint16_t sniff_min_interval; 4866 switch (connection->sniff_min_interval){ 4867 case 0: 4868 break; 4869 case 0xffff: 4870 connection->sniff_min_interval = 0; 4871 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4872 return true; 4873 default: 4874 sniff_min_interval = connection->sniff_min_interval; 4875 connection->sniff_min_interval = 0; 4876 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4877 return true; 4878 } 4879 4880 if (connection->sniff_subrating_max_latency != 0xffff){ 4881 uint16_t max_latency = connection->sniff_subrating_max_latency; 4882 connection->sniff_subrating_max_latency = 0; 4883 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4884 return true; 4885 } 4886 4887 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4888 uint8_t service_type = (uint8_t) connection->qos_service_type; 4889 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4890 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); 4891 return true; 4892 } 4893 4894 if (connection->request_role != HCI_ROLE_INVALID){ 4895 hci_role_t role = connection->request_role; 4896 connection->request_role = HCI_ROLE_INVALID; 4897 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4898 return true; 4899 } 4900 #endif 4901 4902 #ifdef ENABLE_BLE 4903 switch (connection->le_con_parameter_update_state){ 4904 // response to L2CAP CON PARAMETER UPDATE REQUEST 4905 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4906 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4907 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4908 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4909 0x0000, 0xffff); 4910 return true; 4911 case CON_PARAMETER_UPDATE_REPLY: 4912 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4913 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4914 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4915 0x0000, 0xffff); 4916 return true; 4917 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4918 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4919 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4920 return true; 4921 default: 4922 break; 4923 } 4924 if (connection->le_phy_update_all_phys != 0xffu){ 4925 uint8_t all_phys = connection->le_phy_update_all_phys; 4926 connection->le_phy_update_all_phys = 0xff; 4927 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); 4928 return true; 4929 } 4930 #endif 4931 } 4932 return false; 4933 } 4934 4935 static void hci_run(void){ 4936 4937 bool done; 4938 4939 // send continuation fragments first, as they block the prepared packet buffer 4940 done = hci_run_acl_fragments(); 4941 if (done) return; 4942 4943 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4944 // send host num completed packets next as they don't require num_cmd_packets > 0 4945 if (!hci_can_send_comand_packet_transport()) return; 4946 if (hci_stack->host_completed_packets){ 4947 hci_host_num_completed_packets(); 4948 return; 4949 } 4950 #endif 4951 4952 if (!hci_can_send_command_packet_now()) return; 4953 4954 // global/non-connection oriented commands 4955 4956 4957 #ifdef ENABLE_CLASSIC 4958 // general gap classic 4959 done = hci_run_general_gap_classic(); 4960 if (done) return; 4961 #endif 4962 4963 #ifdef ENABLE_BLE 4964 // general gap le 4965 done = hci_run_general_gap_le(); 4966 if (done) return; 4967 #endif 4968 4969 // send pending HCI commands 4970 done = hci_run_general_pending_commands(); 4971 if (done) return; 4972 4973 // stack state sub statemachines 4974 hci_connection_t * connection; 4975 switch (hci_stack->state){ 4976 case HCI_STATE_INITIALIZING: 4977 hci_initializing_run(); 4978 break; 4979 4980 case HCI_STATE_HALTING: 4981 4982 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4983 switch (hci_stack->substate){ 4984 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4985 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4986 4987 #ifdef ENABLE_BLE 4988 #ifdef ENABLE_LE_CENTRAL 4989 // free whitelist entries 4990 { 4991 btstack_linked_list_iterator_t lit; 4992 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4993 while (btstack_linked_list_iterator_has_next(&lit)){ 4994 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4995 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4996 btstack_memory_whitelist_entry_free(entry); 4997 } 4998 } 4999 #endif 5000 #endif 5001 // close all open connections 5002 connection = (hci_connection_t *) hci_stack->connections; 5003 if (connection){ 5004 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5005 if (!hci_can_send_command_packet_now()) return; 5006 5007 // check state 5008 if (connection->state == SENT_DISCONNECT) return; 5009 connection->state = SENT_DISCONNECT; 5010 5011 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5012 5013 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5014 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5015 5016 // ... which would be ignored anyway as we shutdown (free) the connection now 5017 hci_shutdown_connection(connection); 5018 5019 // finally, send the disconnect command 5020 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5021 return; 5022 } 5023 5024 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5025 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5026 log_info("HCI_STATE_HALTING: wait 50 ms"); 5027 hci_stack->substate = HCI_HALTING_W4_TIMER; 5028 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5029 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5030 btstack_run_loop_add_timer(&hci_stack->timeout); 5031 break; 5032 } 5033 5034 /* fall through */ 5035 5036 case HCI_HALTING_CLOSE: 5037 log_info("HCI_STATE_HALTING, calling off"); 5038 5039 // switch mode 5040 hci_power_control_off(); 5041 5042 log_info("HCI_STATE_HALTING, emitting state"); 5043 hci_emit_state(); 5044 log_info("HCI_STATE_HALTING, done"); 5045 break; 5046 5047 case HCI_HALTING_W4_TIMER: 5048 // keep waiting 5049 5050 break; 5051 default: 5052 break; 5053 } 5054 5055 break; 5056 5057 case HCI_STATE_FALLING_ASLEEP: 5058 switch(hci_stack->substate) { 5059 case HCI_FALLING_ASLEEP_DISCONNECT: 5060 log_info("HCI_STATE_FALLING_ASLEEP"); 5061 // close all open connections 5062 connection = (hci_connection_t *) hci_stack->connections; 5063 5064 #ifdef HAVE_PLATFORM_IPHONE_OS 5065 // don't close connections, if H4 supports power management 5066 if (btstack_control_iphone_power_management_enabled()){ 5067 connection = NULL; 5068 } 5069 #endif 5070 if (connection){ 5071 5072 // send disconnect 5073 if (!hci_can_send_command_packet_now()) return; 5074 5075 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5076 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5077 5078 // send disconnected event right away - causes higher layer connections to get closed, too. 5079 hci_shutdown_connection(connection); 5080 return; 5081 } 5082 5083 if (hci_classic_supported()){ 5084 // disable page and inquiry scan 5085 if (!hci_can_send_command_packet_now()) return; 5086 5087 log_info("HCI_STATE_HALTING, disabling inq scans"); 5088 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5089 5090 // continue in next sub state 5091 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5092 break; 5093 } 5094 5095 /* fall through */ 5096 5097 case HCI_FALLING_ASLEEP_COMPLETE: 5098 log_info("HCI_STATE_HALTING, calling sleep"); 5099 #ifdef HAVE_PLATFORM_IPHONE_OS 5100 // don't actually go to sleep, if H4 supports power management 5101 if (btstack_control_iphone_power_management_enabled()){ 5102 // SLEEP MODE reached 5103 hci_stack->state = HCI_STATE_SLEEPING; 5104 hci_emit_state(); 5105 break; 5106 } 5107 #endif 5108 // switch mode 5109 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5110 hci_emit_state(); 5111 break; 5112 5113 default: 5114 break; 5115 } 5116 break; 5117 5118 default: 5119 break; 5120 } 5121 } 5122 5123 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5124 // house-keeping 5125 5126 #ifdef ENABLE_CLASSIC 5127 bd_addr_t addr; 5128 hci_connection_t * conn; 5129 #endif 5130 #ifdef ENABLE_LE_CENTRAL 5131 uint8_t initiator_filter_policy; 5132 #endif 5133 5134 uint16_t opcode = little_endian_read_16(packet, 0); 5135 switch (opcode) { 5136 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5137 hci_stack->loopback_mode = packet[3]; 5138 break; 5139 5140 #ifdef ENABLE_CLASSIC 5141 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5142 reverse_bd_addr(&packet[3], addr); 5143 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5144 5145 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5146 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5147 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5148 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5149 } 5150 5151 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5152 if (!conn) { 5153 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5154 if (!conn) { 5155 // notify client that alloc failed 5156 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5157 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5158 } 5159 conn->state = SEND_CREATE_CONNECTION; 5160 conn->role = HCI_ROLE_MASTER; 5161 } 5162 log_info("conn state %u", conn->state); 5163 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5164 switch (conn->state) { 5165 // if connection active exists 5166 case OPEN: 5167 // and OPEN, emit connection complete command 5168 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5169 // packet not sent to controller 5170 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5171 case RECEIVED_DISCONNECTION_COMPLETE: 5172 // create connection triggered in disconnect complete event, let's do it now 5173 break; 5174 case SEND_CREATE_CONNECTION: 5175 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5176 break; 5177 default: 5178 // otherwise, just ignore as it is already in the open process 5179 // packet not sent to controller 5180 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5181 } 5182 conn->state = SENT_CREATE_CONNECTION; 5183 5184 // track outgoing connection 5185 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5186 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5187 break; 5188 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5189 if (hci_stack->link_key_db) { 5190 reverse_bd_addr(&packet[3], addr); 5191 hci_stack->link_key_db->delete_link_key(addr); 5192 } 5193 break; 5194 5195 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5196 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5197 // setup_synchronous_connection? Voice setting at offset 22 5198 // TODO: compare to current setting if sco connection already active 5199 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5200 break; 5201 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5202 // accept_synchronus_connection? Voice setting at offset 18 5203 // TODO: compare to current setting if sco connection already active 5204 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5205 break; 5206 #endif 5207 #endif 5208 5209 #ifdef ENABLE_BLE 5210 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5211 hci_stack->le_random_address_set = 1; 5212 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5213 break; 5214 #ifdef ENABLE_LE_PERIPHERAL 5215 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5216 hci_stack->le_advertisements_active = packet[3] != 0; 5217 break; 5218 #endif 5219 #ifdef ENABLE_LE_CENTRAL 5220 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5221 // white list used? 5222 initiator_filter_policy = packet[7]; 5223 switch (initiator_filter_policy) { 5224 case 0: 5225 // whitelist not used 5226 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5227 break; 5228 case 1: 5229 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5230 break; 5231 default: 5232 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5233 break; 5234 } 5235 // track outgoing connection 5236 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5237 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5238 break; 5239 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5240 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5241 break; 5242 #endif 5243 #endif 5244 default: 5245 break; 5246 } 5247 5248 hci_stack->num_cmd_packets--; 5249 5250 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5251 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5252 if (err != 0){ 5253 return ERROR_CODE_HARDWARE_FAILURE; 5254 } 5255 return ERROR_CODE_SUCCESS; 5256 } 5257 5258 // disconnect because of security block 5259 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5260 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5261 if (!connection) return; 5262 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5263 } 5264 5265 5266 // Configure Secure Simple Pairing 5267 5268 #ifdef ENABLE_CLASSIC 5269 5270 // enable will enable SSP during init 5271 void gap_ssp_set_enable(int enable){ 5272 hci_stack->ssp_enable = enable; 5273 } 5274 5275 static int hci_local_ssp_activated(void){ 5276 return gap_ssp_supported() && hci_stack->ssp_enable; 5277 } 5278 5279 // if set, BTstack will respond to io capability request using authentication requirement 5280 void gap_ssp_set_io_capability(int io_capability){ 5281 hci_stack->ssp_io_capability = io_capability; 5282 } 5283 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5284 hci_stack->ssp_authentication_requirement = authentication_requirement; 5285 } 5286 5287 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5288 void gap_ssp_set_auto_accept(int auto_accept){ 5289 hci_stack->ssp_auto_accept = auto_accept; 5290 } 5291 5292 void gap_secure_connections_enable(bool enable){ 5293 hci_stack->secure_connections_enable = enable; 5294 } 5295 5296 #endif 5297 5298 // va_list part of hci_send_cmd 5299 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5300 if (!hci_can_send_command_packet_now()){ 5301 log_error("hci_send_cmd called but cannot send packet now"); 5302 return ERROR_CODE_COMMAND_DISALLOWED; 5303 } 5304 5305 // for HCI INITIALIZATION 5306 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5307 hci_stack->last_cmd_opcode = cmd->opcode; 5308 5309 hci_reserve_packet_buffer(); 5310 uint8_t * packet = hci_stack->hci_packet_buffer; 5311 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5312 uint8_t status = hci_send_cmd_packet(packet, size); 5313 5314 // release packet buffer on error or for synchronous transport implementations 5315 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5316 hci_release_packet_buffer(); 5317 hci_emit_transport_packet_sent(); 5318 } 5319 5320 return status; 5321 } 5322 5323 /** 5324 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5325 */ 5326 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5327 va_list argptr; 5328 va_start(argptr, cmd); 5329 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5330 va_end(argptr); 5331 return status; 5332 } 5333 5334 // Create various non-HCI events. 5335 // TODO: generalize, use table similar to hci_create_command 5336 5337 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5338 // dump packet 5339 if (dump) { 5340 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5341 } 5342 5343 // dispatch to all event handlers 5344 btstack_linked_list_iterator_t it; 5345 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5346 while (btstack_linked_list_iterator_has_next(&it)){ 5347 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5348 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5349 } 5350 } 5351 5352 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5353 if (!hci_stack->acl_packet_handler) return; 5354 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5355 } 5356 5357 #ifdef ENABLE_CLASSIC 5358 static void hci_notify_if_sco_can_send_now(void){ 5359 // notify SCO sender if waiting 5360 if (!hci_stack->sco_waiting_for_can_send_now) return; 5361 if (hci_can_send_sco_packet_now()){ 5362 hci_stack->sco_waiting_for_can_send_now = 0; 5363 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5364 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5365 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5366 } 5367 } 5368 5369 // parsing end emitting has been merged to reduce code size 5370 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5371 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5372 5373 uint8_t * eir_data; 5374 ad_context_t context; 5375 const uint8_t * name; 5376 uint8_t name_len; 5377 5378 if (size < 3) return; 5379 5380 int event_type = hci_event_packet_get_type(packet); 5381 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5382 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5383 5384 switch (event_type){ 5385 case HCI_EVENT_INQUIRY_RESULT: 5386 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5387 if (size != (3 + (num_responses * 14))) return; 5388 break; 5389 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5390 if (size != 257) return; 5391 if (num_responses != 1) return; 5392 break; 5393 default: 5394 return; 5395 } 5396 5397 // event[1] is set at the end 5398 int i; 5399 for (i=0; i<num_responses;i++){ 5400 memset(event, 0, sizeof(event)); 5401 event[0] = GAP_EVENT_INQUIRY_RESULT; 5402 uint8_t event_size = 27; // if name is not set by EIR 5403 5404 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5405 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5406 (void)memcpy(&event[9], 5407 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5408 3); // class of device 5409 (void)memcpy(&event[12], 5410 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5411 2); // clock offset 5412 5413 switch (event_type){ 5414 case HCI_EVENT_INQUIRY_RESULT: 5415 // 14,15,16,17 = 0, size 18 5416 break; 5417 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5418 event[14] = 1; 5419 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5420 // 16,17 = 0, size 18 5421 break; 5422 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5423 event[14] = 1; 5424 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5425 // EIR packets only contain a single inquiry response 5426 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5427 name = NULL; 5428 // Iterate over EIR data 5429 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5430 uint8_t data_type = ad_iterator_get_data_type(&context); 5431 uint8_t data_size = ad_iterator_get_data_len(&context); 5432 const uint8_t * data = ad_iterator_get_data(&context); 5433 // Prefer Complete Local Name over Shortened Local Name 5434 switch (data_type){ 5435 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5436 if (name) continue; 5437 /* fall through */ 5438 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5439 name = data; 5440 name_len = data_size; 5441 break; 5442 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5443 if (data_size != 8) break; 5444 event[16] = 1; 5445 memcpy(&event[17], data, 8); 5446 break; 5447 default: 5448 break; 5449 } 5450 } 5451 if (name){ 5452 event[25] = 1; 5453 // truncate name if needed 5454 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5455 event[26] = len; 5456 (void)memcpy(&event[27], name, len); 5457 event_size += len; 5458 } 5459 break; 5460 default: 5461 return; 5462 } 5463 event[1] = event_size - 2; 5464 hci_emit_event(event, event_size, 1); 5465 } 5466 } 5467 #endif 5468 5469 void hci_emit_state(void){ 5470 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5471 uint8_t event[3]; 5472 event[0] = BTSTACK_EVENT_STATE; 5473 event[1] = sizeof(event) - 2u; 5474 event[2] = hci_stack->state; 5475 hci_emit_event(event, sizeof(event), 1); 5476 } 5477 5478 #ifdef ENABLE_CLASSIC 5479 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5480 uint8_t event[13]; 5481 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5482 event[1] = sizeof(event) - 2; 5483 event[2] = status; 5484 little_endian_store_16(event, 3, con_handle); 5485 reverse_bd_addr(address, &event[5]); 5486 event[11] = 1; // ACL connection 5487 event[12] = 0; // encryption disabled 5488 hci_emit_event(event, sizeof(event), 1); 5489 } 5490 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5491 if (disable_l2cap_timeouts) return; 5492 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5493 uint8_t event[4]; 5494 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5495 event[1] = sizeof(event) - 2; 5496 little_endian_store_16(event, 2, conn->con_handle); 5497 hci_emit_event(event, sizeof(event), 1); 5498 } 5499 #endif 5500 5501 #ifdef ENABLE_BLE 5502 #ifdef ENABLE_LE_CENTRAL 5503 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){ 5504 uint8_t event[21]; 5505 event[0] = HCI_EVENT_LE_META; 5506 event[1] = sizeof(event) - 2u; 5507 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5508 event[3] = status; 5509 little_endian_store_16(event, 4, con_handle); 5510 event[6] = 0; // TODO: role 5511 event[7] = address_type; 5512 reverse_bd_addr(address, &event[8]); 5513 little_endian_store_16(event, 14, 0); // interval 5514 little_endian_store_16(event, 16, 0); // latency 5515 little_endian_store_16(event, 18, 0); // supervision timeout 5516 event[20] = 0; // master clock accuracy 5517 hci_emit_event(event, sizeof(event), 1); 5518 } 5519 #endif 5520 #endif 5521 5522 static void hci_emit_transport_packet_sent(void){ 5523 // notify upper stack that it might be possible to send again 5524 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5525 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5526 } 5527 5528 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5529 uint8_t event[6]; 5530 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5531 event[1] = sizeof(event) - 2u; 5532 event[2] = 0; // status = OK 5533 little_endian_store_16(event, 3, con_handle); 5534 event[5] = reason; 5535 hci_emit_event(event, sizeof(event), 1); 5536 } 5537 5538 static void hci_emit_nr_connections_changed(void){ 5539 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5540 uint8_t event[3]; 5541 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5542 event[1] = sizeof(event) - 2u; 5543 event[2] = nr_hci_connections(); 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 5547 static void hci_emit_hci_open_failed(void){ 5548 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5549 uint8_t event[2]; 5550 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5551 event[1] = sizeof(event) - 2u; 5552 hci_emit_event(event, sizeof(event), 1); 5553 } 5554 5555 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5556 log_info("hci_emit_dedicated_bonding_result %u ", status); 5557 uint8_t event[9]; 5558 int pos = 0; 5559 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5560 event[pos++] = sizeof(event) - 2u; 5561 event[pos++] = status; 5562 reverse_bd_addr(address, &event[pos]); 5563 hci_emit_event(event, sizeof(event), 1); 5564 } 5565 5566 5567 #ifdef ENABLE_CLASSIC 5568 5569 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5570 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5571 uint8_t event[5]; 5572 int pos = 0; 5573 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5574 event[pos++] = sizeof(event) - 2; 5575 little_endian_store_16(event, 2, con_handle); 5576 pos += 2; 5577 event[pos++] = level; 5578 hci_emit_event(event, sizeof(event), 1); 5579 } 5580 5581 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5582 if (!connection) return LEVEL_0; 5583 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5584 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5585 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5586 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5587 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5588 // LEVEL 4 always requires 128 bit encrytion key size 5589 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5590 security_level = LEVEL_3; 5591 } 5592 return security_level; 5593 } 5594 5595 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5596 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5597 uint8_t event[3]; 5598 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5599 event[1] = sizeof(event) - 2; 5600 event[2] = enabled; 5601 hci_emit_event(event, sizeof(event), 1); 5602 } 5603 5604 // query if remote side supports eSCO 5605 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5606 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5607 if (!connection) return false; 5608 return (connection->remote_supported_features[0] & 1) != 0; 5609 } 5610 5611 static bool hci_ssp_supported(hci_connection_t * connection){ 5612 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5613 return (connection->bonding_flags & mask) == mask; 5614 } 5615 5616 // query if remote side supports SSP 5617 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5618 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5619 if (!connection) return false; 5620 return hci_ssp_supported(connection) ? 1 : 0; 5621 } 5622 5623 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5624 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5625 } 5626 5627 // GAP API 5628 /** 5629 * @bbrief enable/disable bonding. default is enabled 5630 * @praram enabled 5631 */ 5632 void gap_set_bondable_mode(int enable){ 5633 hci_stack->bondable = enable ? 1 : 0; 5634 } 5635 /** 5636 * @brief Get bondable mode. 5637 * @return 1 if bondable 5638 */ 5639 int gap_get_bondable_mode(void){ 5640 return hci_stack->bondable; 5641 } 5642 5643 /** 5644 * @brief map link keys to security levels 5645 */ 5646 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5647 switch (link_key_type){ 5648 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5649 return LEVEL_4; 5650 case COMBINATION_KEY: 5651 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5652 return LEVEL_3; 5653 default: 5654 return LEVEL_2; 5655 } 5656 } 5657 5658 /** 5659 * @brief map link keys to secure connection yes/no 5660 */ 5661 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5662 switch (link_key_type){ 5663 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5664 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5665 return 1; 5666 default: 5667 return 0; 5668 } 5669 } 5670 5671 /** 5672 * @brief map link keys to authenticated 5673 */ 5674 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5675 switch (link_key_type){ 5676 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5677 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5678 return 1; 5679 default: 5680 return 0; 5681 } 5682 } 5683 5684 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5685 log_info("gap_mitm_protection_required_for_security_level %u", level); 5686 return level > LEVEL_2; 5687 } 5688 5689 /** 5690 * @brief get current security level 5691 */ 5692 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5693 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5694 if (!connection) return LEVEL_0; 5695 return gap_security_level_for_connection(connection); 5696 } 5697 5698 /** 5699 * @brief request connection to device to 5700 * @result GAP_AUTHENTICATION_RESULT 5701 */ 5702 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5703 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5704 if (!connection){ 5705 hci_emit_security_level(con_handle, LEVEL_0); 5706 return; 5707 } 5708 5709 btstack_assert(hci_is_le_connection(connection) == false); 5710 5711 // 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) 5712 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5713 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5714 requested_level = LEVEL_4; 5715 } 5716 5717 gap_security_level_t current_level = gap_security_level(con_handle); 5718 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5719 requested_level, connection->requested_security_level, current_level); 5720 5721 // authentication active if authentication request was sent or planned level > 0 5722 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5723 if (authentication_active){ 5724 // authentication already active 5725 if (connection->requested_security_level < requested_level){ 5726 // increase requested level as new level is higher 5727 // TODO: handle re-authentication when done 5728 connection->requested_security_level = requested_level; 5729 } 5730 } else { 5731 // no request active, notify if security sufficient 5732 if (requested_level <= current_level){ 5733 hci_emit_security_level(con_handle, current_level); 5734 return; 5735 } 5736 5737 // store request 5738 connection->requested_security_level = requested_level; 5739 5740 // start to authenticate connection 5741 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5742 hci_run(); 5743 } 5744 } 5745 5746 /** 5747 * @brief start dedicated bonding with device. disconnect after bonding 5748 * @param device 5749 * @param request MITM protection 5750 * @result GAP_DEDICATED_BONDING_COMPLETE 5751 */ 5752 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5753 5754 // create connection state machine 5755 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5756 5757 if (!connection){ 5758 return BTSTACK_MEMORY_ALLOC_FAILED; 5759 } 5760 5761 // delete linkn key 5762 gap_drop_link_key_for_bd_addr(device); 5763 5764 // configure LEVEL_2/3, dedicated bonding 5765 connection->state = SEND_CREATE_CONNECTION; 5766 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5767 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5768 connection->bonding_flags = BONDING_DEDICATED; 5769 5770 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5771 5772 // handle: connnection failure (connection complete != ok) 5773 // handle: authentication failure 5774 // handle: disconnect on done 5775 5776 hci_run(); 5777 5778 return 0; 5779 } 5780 #endif 5781 5782 void gap_set_local_name(const char * local_name){ 5783 hci_stack->local_name = local_name; 5784 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5785 // also update EIR if not set by user 5786 if (hci_stack->eir_data == NULL){ 5787 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5788 } 5789 hci_run(); 5790 } 5791 5792 5793 #ifdef ENABLE_BLE 5794 5795 #ifdef ENABLE_LE_CENTRAL 5796 void gap_start_scan(void){ 5797 hci_stack->le_scanning_enabled = true; 5798 hci_run(); 5799 } 5800 5801 void gap_stop_scan(void){ 5802 hci_stack->le_scanning_enabled = false; 5803 hci_run(); 5804 } 5805 5806 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5807 hci_stack->le_scan_type = scan_type; 5808 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5809 hci_stack->le_scan_interval = scan_interval; 5810 hci_stack->le_scan_window = scan_window; 5811 hci_stack->le_scanning_param_update = true; 5812 hci_run(); 5813 } 5814 5815 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5816 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5817 } 5818 5819 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5820 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5821 if (!conn){ 5822 // disallow if le connection is already outgoing 5823 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5824 log_error("le connection already active"); 5825 return ERROR_CODE_COMMAND_DISALLOWED; 5826 } 5827 5828 log_info("gap_connect: no connection exists yet, creating context"); 5829 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5830 if (!conn){ 5831 // notify client that alloc failed 5832 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5833 log_info("gap_connect: failed to alloc hci_connection_t"); 5834 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5835 } 5836 5837 // set le connecting state 5838 if (hci_is_le_connection_type(addr_type)){ 5839 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5840 } 5841 5842 conn->state = SEND_CREATE_CONNECTION; 5843 log_info("gap_connect: send create connection next"); 5844 hci_run(); 5845 return ERROR_CODE_SUCCESS; 5846 } 5847 5848 if (!hci_is_le_connection(conn) || 5849 (conn->state == SEND_CREATE_CONNECTION) || 5850 (conn->state == SENT_CREATE_CONNECTION)) { 5851 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5852 log_error("gap_connect: classic connection or connect is already being created"); 5853 return GATT_CLIENT_IN_WRONG_STATE; 5854 } 5855 5856 // check if connection was just disconnected 5857 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5858 log_info("gap_connect: send create connection (again)"); 5859 conn->state = SEND_CREATE_CONNECTION; 5860 hci_run(); 5861 return ERROR_CODE_SUCCESS; 5862 } 5863 5864 log_info("gap_connect: context exists with state %u", conn->state); 5865 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5866 hci_run(); 5867 return ERROR_CODE_SUCCESS; 5868 } 5869 5870 // @assumption: only a single outgoing LE Connection exists 5871 static hci_connection_t * gap_get_outgoing_connection(void){ 5872 btstack_linked_item_t *it; 5873 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5874 hci_connection_t * conn = (hci_connection_t *) it; 5875 if (!hci_is_le_connection(conn)) continue; 5876 switch (conn->state){ 5877 case SEND_CREATE_CONNECTION: 5878 case SENT_CREATE_CONNECTION: 5879 case SENT_CANCEL_CONNECTION: 5880 return conn; 5881 default: 5882 break; 5883 }; 5884 } 5885 return NULL; 5886 } 5887 5888 uint8_t gap_connect_cancel(void){ 5889 hci_connection_t * conn = gap_get_outgoing_connection(); 5890 if (!conn) return 0; 5891 switch (conn->state){ 5892 case SEND_CREATE_CONNECTION: 5893 // skip sending create connection and emit event instead 5894 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5895 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5896 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5897 btstack_memory_hci_connection_free( conn ); 5898 break; 5899 case SENT_CREATE_CONNECTION: 5900 // request to send cancel connection 5901 conn->state = SEND_CANCEL_CONNECTION; 5902 hci_run(); 5903 break; 5904 default: 5905 break; 5906 } 5907 return 0; 5908 } 5909 #endif 5910 5911 #ifdef ENABLE_LE_CENTRAL 5912 /** 5913 * @brief Set connection parameters for outgoing connections 5914 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5915 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5916 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5917 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5918 * @param conn_latency, default: 4 5919 * @param supervision_timeout (unit: 10ms), default: 720 ms 5920 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5921 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5922 */ 5923 5924 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5925 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5926 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5927 hci_stack->le_connection_scan_interval = conn_scan_interval; 5928 hci_stack->le_connection_scan_window = conn_scan_window; 5929 hci_stack->le_connection_interval_min = conn_interval_min; 5930 hci_stack->le_connection_interval_max = conn_interval_max; 5931 hci_stack->le_connection_latency = conn_latency; 5932 hci_stack->le_supervision_timeout = supervision_timeout; 5933 hci_stack->le_minimum_ce_length = min_ce_length; 5934 hci_stack->le_maximum_ce_length = max_ce_length; 5935 } 5936 #endif 5937 5938 /** 5939 * @brief Updates the connection parameters for a given LE connection 5940 * @param handle 5941 * @param conn_interval_min (unit: 1.25ms) 5942 * @param conn_interval_max (unit: 1.25ms) 5943 * @param conn_latency 5944 * @param supervision_timeout (unit: 10ms) 5945 * @returns 0 if ok 5946 */ 5947 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5948 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5949 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5950 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5951 connection->le_conn_interval_min = conn_interval_min; 5952 connection->le_conn_interval_max = conn_interval_max; 5953 connection->le_conn_latency = conn_latency; 5954 connection->le_supervision_timeout = supervision_timeout; 5955 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5956 hci_run(); 5957 return 0; 5958 } 5959 5960 /** 5961 * @brief Request an update of the connection parameter for a given LE connection 5962 * @param handle 5963 * @param conn_interval_min (unit: 1.25ms) 5964 * @param conn_interval_max (unit: 1.25ms) 5965 * @param conn_latency 5966 * @param supervision_timeout (unit: 10ms) 5967 * @returns 0 if ok 5968 */ 5969 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5970 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5971 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5972 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5973 connection->le_conn_interval_min = conn_interval_min; 5974 connection->le_conn_interval_max = conn_interval_max; 5975 connection->le_conn_latency = conn_latency; 5976 connection->le_supervision_timeout = supervision_timeout; 5977 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5978 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5979 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5980 return 0; 5981 } 5982 5983 #ifdef ENABLE_LE_PERIPHERAL 5984 5985 /** 5986 * @brief Set Advertisement Data 5987 * @param advertising_data_length 5988 * @param advertising_data (max 31 octets) 5989 * @note data is not copied, pointer has to stay valid 5990 */ 5991 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5992 hci_stack->le_advertisements_data_len = advertising_data_length; 5993 hci_stack->le_advertisements_data = advertising_data; 5994 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5995 hci_run(); 5996 } 5997 5998 /** 5999 * @brief Set Scan Response Data 6000 * @param advertising_data_length 6001 * @param advertising_data (max 31 octets) 6002 * @note data is not copied, pointer has to stay valid 6003 */ 6004 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6005 hci_stack->le_scan_response_data_len = scan_response_data_length; 6006 hci_stack->le_scan_response_data = scan_response_data; 6007 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6008 hci_run(); 6009 } 6010 6011 /** 6012 * @brief Set Advertisement Parameters 6013 * @param adv_int_min 6014 * @param adv_int_max 6015 * @param adv_type 6016 * @param direct_address_type 6017 * @param direct_address 6018 * @param channel_map 6019 * @param filter_policy 6020 * 6021 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6022 */ 6023 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6024 uint8_t direct_address_typ, bd_addr_t direct_address, 6025 uint8_t channel_map, uint8_t filter_policy) { 6026 6027 hci_stack->le_advertisements_interval_min = adv_int_min; 6028 hci_stack->le_advertisements_interval_max = adv_int_max; 6029 hci_stack->le_advertisements_type = adv_type; 6030 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6031 hci_stack->le_advertisements_channel_map = channel_map; 6032 hci_stack->le_advertisements_filter_policy = filter_policy; 6033 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6034 6); 6035 6036 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6037 hci_run(); 6038 } 6039 6040 /** 6041 * @brief Enable/Disable Advertisements 6042 * @param enabled 6043 */ 6044 void gap_advertisements_enable(int enabled){ 6045 hci_stack->le_advertisements_enabled = enabled != 0; 6046 hci_update_advertisements_enabled_for_current_roles(); 6047 hci_run(); 6048 } 6049 6050 #endif 6051 6052 void hci_le_set_own_address_type(uint8_t own_address_type){ 6053 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6054 if (own_address_type == hci_stack->le_own_addr_type) return; 6055 hci_stack->le_own_addr_type = own_address_type; 6056 6057 #ifdef ENABLE_LE_PERIPHERAL 6058 // update advertisement parameters, too 6059 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6060 hci_run(); 6061 #endif 6062 #ifdef ENABLE_LE_CENTRAL 6063 // note: we don't update scan parameters or modify ongoing connection attempts 6064 #endif 6065 } 6066 6067 #endif 6068 6069 uint8_t gap_disconnect(hci_con_handle_t handle){ 6070 hci_connection_t * conn = hci_connection_for_handle(handle); 6071 if (!conn){ 6072 hci_emit_disconnection_complete(handle, 0); 6073 return 0; 6074 } 6075 // ignore if already disconnected 6076 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6077 return 0; 6078 } 6079 conn->state = SEND_DISCONNECT; 6080 hci_run(); 6081 return 0; 6082 } 6083 6084 int gap_read_rssi(hci_con_handle_t con_handle){ 6085 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6086 if (hci_connection == NULL) return 0; 6087 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6088 hci_run(); 6089 return 1; 6090 } 6091 6092 /** 6093 * @brief Get connection type 6094 * @param con_handle 6095 * @result connection_type 6096 */ 6097 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6098 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6099 if (!conn) return GAP_CONNECTION_INVALID; 6100 switch (conn->address_type){ 6101 case BD_ADDR_TYPE_LE_PUBLIC: 6102 case BD_ADDR_TYPE_LE_RANDOM: 6103 return GAP_CONNECTION_LE; 6104 case BD_ADDR_TYPE_SCO: 6105 return GAP_CONNECTION_SCO; 6106 case BD_ADDR_TYPE_ACL: 6107 return GAP_CONNECTION_ACL; 6108 default: 6109 return GAP_CONNECTION_INVALID; 6110 } 6111 } 6112 6113 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6114 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6115 if (!conn) return HCI_ROLE_INVALID; 6116 return (hci_role_t) conn->role; 6117 } 6118 6119 6120 #ifdef ENABLE_CLASSIC 6121 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6122 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6123 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6124 conn->request_role = role; 6125 hci_run(); 6126 return ERROR_CODE_SUCCESS; 6127 } 6128 #endif 6129 6130 #ifdef ENABLE_BLE 6131 6132 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){ 6133 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6134 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6135 6136 conn->le_phy_update_all_phys = all_phys; 6137 conn->le_phy_update_tx_phys = tx_phys; 6138 conn->le_phy_update_rx_phys = rx_phys; 6139 conn->le_phy_update_phy_options = phy_options; 6140 6141 hci_run(); 6142 6143 return 0; 6144 } 6145 6146 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6147 // check if already in list 6148 btstack_linked_list_iterator_t it; 6149 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6150 while (btstack_linked_list_iterator_has_next(&it)) { 6151 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6152 if (entry->address_type != address_type) { 6153 continue; 6154 } 6155 if (memcmp(entry->address, address, 6) != 0) { 6156 continue; 6157 } 6158 // disallow if already scheduled to add 6159 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6160 return ERROR_CODE_COMMAND_DISALLOWED; 6161 } 6162 // still on controller, but scheduled to remove -> re-add 6163 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6164 return ERROR_CODE_SUCCESS; 6165 } 6166 // alloc and add to list 6167 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6168 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6169 entry->address_type = address_type; 6170 (void)memcpy(entry->address, address, 6); 6171 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6172 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6173 return ERROR_CODE_SUCCESS; 6174 } 6175 6176 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6177 btstack_linked_list_iterator_t it; 6178 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6179 while (btstack_linked_list_iterator_has_next(&it)){ 6180 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6181 if (entry->address_type != address_type) { 6182 continue; 6183 } 6184 if (memcmp(entry->address, address, 6) != 0) { 6185 continue; 6186 } 6187 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6188 // remove from controller if already present 6189 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6190 } else { 6191 // directly remove entry from whitelist 6192 btstack_linked_list_iterator_remove(&it); 6193 btstack_memory_whitelist_entry_free(entry); 6194 } 6195 return ERROR_CODE_SUCCESS; 6196 } 6197 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6198 } 6199 6200 static void hci_whitelist_clear(void){ 6201 btstack_linked_list_iterator_t it; 6202 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6203 while (btstack_linked_list_iterator_has_next(&it)){ 6204 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6205 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6206 // remove from controller if already present 6207 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6208 continue; 6209 } 6210 // directly remove entry from whitelist 6211 btstack_linked_list_iterator_remove(&it); 6212 btstack_memory_whitelist_entry_free(entry); 6213 } 6214 } 6215 6216 /** 6217 * @brief Clear Whitelist 6218 * @returns 0 if ok 6219 */ 6220 uint8_t gap_whitelist_clear(void){ 6221 hci_whitelist_clear(); 6222 hci_run(); 6223 return ERROR_CODE_SUCCESS; 6224 } 6225 6226 /** 6227 * @brief Add Device to Whitelist 6228 * @param address_typ 6229 * @param address 6230 * @returns 0 if ok 6231 */ 6232 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6233 uint8_t status = hci_whitelist_add(address_type, address); 6234 if (status){ 6235 return status; 6236 } 6237 hci_run(); 6238 return ERROR_CODE_SUCCESS; 6239 } 6240 6241 /** 6242 * @brief Remove Device from Whitelist 6243 * @param address_typ 6244 * @param address 6245 * @returns 0 if ok 6246 */ 6247 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6248 uint8_t status = hci_whitelist_remove(address_type, address); 6249 if (status){ 6250 return status; 6251 } 6252 hci_run(); 6253 return ERROR_CODE_SUCCESS; 6254 } 6255 6256 #ifdef ENABLE_LE_CENTRAL 6257 /** 6258 * @brief Connect with Whitelist 6259 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6260 * @returns - if ok 6261 */ 6262 uint8_t gap_connect_with_whitelist(void){ 6263 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6264 return ERROR_CODE_COMMAND_DISALLOWED; 6265 } 6266 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 /** 6272 * @brief Auto Connection Establishment - Start Connecting to device 6273 * @param address_typ 6274 * @param address 6275 * @returns 0 if ok 6276 */ 6277 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6278 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6279 return ERROR_CODE_COMMAND_DISALLOWED; 6280 } 6281 6282 uint8_t status = hci_whitelist_add(address_type, address); 6283 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6284 return status; 6285 } 6286 6287 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6288 6289 hci_run(); 6290 return ERROR_CODE_SUCCESS; 6291 } 6292 6293 /** 6294 * @brief Auto Connection Establishment - Stop Connecting to device 6295 * @param address_typ 6296 * @param address 6297 * @returns 0 if ok 6298 */ 6299 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6300 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6301 return ERROR_CODE_COMMAND_DISALLOWED; 6302 } 6303 6304 hci_whitelist_remove(address_type, address); 6305 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6306 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6307 } 6308 hci_run(); 6309 return 0; 6310 } 6311 6312 /** 6313 * @brief Auto Connection Establishment - Stop everything 6314 * @note Convenience function to stop all active auto connection attempts 6315 */ 6316 uint8_t gap_auto_connection_stop_all(void){ 6317 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6318 return ERROR_CODE_COMMAND_DISALLOWED; 6319 } 6320 hci_whitelist_clear(); 6321 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6322 hci_run(); 6323 return ERROR_CODE_SUCCESS; 6324 } 6325 6326 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6327 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6328 if (!conn) return 0; 6329 return conn->le_connection_interval; 6330 } 6331 #endif 6332 #endif 6333 6334 #ifdef ENABLE_CLASSIC 6335 /** 6336 * @brief Set Extended Inquiry Response data 6337 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6338 * @note has to be done before stack starts up 6339 */ 6340 void gap_set_extended_inquiry_response(const uint8_t * data){ 6341 hci_stack->eir_data = data; 6342 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6343 hci_run(); 6344 } 6345 6346 /** 6347 * @brief Start GAP Classic Inquiry 6348 * @param duration in 1.28s units 6349 * @return 0 if ok 6350 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6351 */ 6352 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6353 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6354 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6355 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6356 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6357 } 6358 hci_stack->inquiry_state = duration_in_1280ms_units; 6359 hci_run(); 6360 return 0; 6361 } 6362 6363 /** 6364 * @brief Stop GAP Classic Inquiry 6365 * @returns 0 if ok 6366 */ 6367 int gap_inquiry_stop(void){ 6368 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6369 // emit inquiry complete event, before it even started 6370 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6371 hci_emit_event(event, sizeof(event), 1); 6372 return 0; 6373 } 6374 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6375 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6376 hci_run(); 6377 return 0; 6378 } 6379 6380 void gap_inquiry_set_lap(uint32_t lap){ 6381 hci_stack->inquiry_lap = lap; 6382 } 6383 6384 6385 /** 6386 * @brief Remote Name Request 6387 * @param addr 6388 * @param page_scan_repetition_mode 6389 * @param clock_offset only used when bit 15 is set 6390 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6391 */ 6392 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6393 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6394 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6395 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6396 hci_stack->remote_name_clock_offset = clock_offset; 6397 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6398 hci_run(); 6399 return 0; 6400 } 6401 6402 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6403 hci_stack->gap_pairing_state = state; 6404 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6405 hci_run(); 6406 return 0; 6407 } 6408 6409 /** 6410 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6411 * @param addr 6412 * @param pin_data 6413 * @param pin_len 6414 * @return 0 if ok 6415 */ 6416 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6417 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6418 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6419 hci_stack->gap_pairing_pin_len = pin_len; 6420 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6421 } 6422 6423 /** 6424 * @brief Legacy Pairing Pin Code Response 6425 * @param addr 6426 * @param pin 6427 * @return 0 if ok 6428 */ 6429 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6430 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6431 } 6432 6433 /** 6434 * @brief Abort Legacy Pairing 6435 * @param addr 6436 * @param pin 6437 * @return 0 if ok 6438 */ 6439 int gap_pin_code_negative(bd_addr_t addr){ 6440 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6441 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6442 } 6443 6444 /** 6445 * @brief SSP Passkey Response 6446 * @param addr 6447 * @param passkey 6448 * @return 0 if ok 6449 */ 6450 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6451 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6452 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6453 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6454 } 6455 6456 /** 6457 * @brief Abort SSP Passkey Entry/Pairing 6458 * @param addr 6459 * @param pin 6460 * @return 0 if ok 6461 */ 6462 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6463 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6464 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6465 } 6466 6467 /** 6468 * @brief Accept SSP Numeric Comparison 6469 * @param addr 6470 * @param passkey 6471 * @return 0 if ok 6472 */ 6473 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6474 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6475 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6476 } 6477 6478 /** 6479 * @brief Abort SSP Numeric Comparison/Pairing 6480 * @param addr 6481 * @param pin 6482 * @return 0 if ok 6483 */ 6484 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6485 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6486 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6487 } 6488 6489 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6490 6491 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6492 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6493 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6494 connectionSetAuthenticationFlags(conn, flag); 6495 hci_run(); 6496 return ERROR_CODE_SUCCESS; 6497 } 6498 6499 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6500 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6501 } 6502 6503 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6504 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6505 } 6506 #endif 6507 6508 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6509 /** 6510 * @brief Report Remote OOB Data 6511 * @param bd_addr 6512 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6513 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6514 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6515 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6516 */ 6517 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){ 6518 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6519 if (connection == NULL) { 6520 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6521 } 6522 connection->classic_oob_c_192 = c_192; 6523 connection->classic_oob_r_192 = r_192; 6524 6525 // ignore P-256 if not supported by us 6526 if (hci_stack->secure_connections_active){ 6527 connection->classic_oob_c_256 = c_256; 6528 connection->classic_oob_r_256 = r_256; 6529 } 6530 6531 return ERROR_CODE_SUCCESS; 6532 } 6533 /** 6534 * @brief Generate new OOB data 6535 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6536 */ 6537 void gap_ssp_generate_oob_data(void){ 6538 hci_stack->classic_read_local_oob_data = true; 6539 hci_run(); 6540 } 6541 6542 #endif 6543 6544 /** 6545 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6546 * @param inquiry_mode see bluetooth_defines.h 6547 */ 6548 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6549 hci_stack->inquiry_mode = inquiry_mode; 6550 } 6551 6552 /** 6553 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6554 */ 6555 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6556 hci_stack->sco_voice_setting = voice_setting; 6557 } 6558 6559 /** 6560 * @brief Get SCO Voice Setting 6561 * @return current voice setting 6562 */ 6563 uint16_t hci_get_sco_voice_setting(void){ 6564 return hci_stack->sco_voice_setting; 6565 } 6566 6567 static int hci_have_usb_transport(void){ 6568 if (!hci_stack->hci_transport) return 0; 6569 const char * transport_name = hci_stack->hci_transport->name; 6570 if (!transport_name) return 0; 6571 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6572 } 6573 6574 /** @brief Get SCO packet length for current SCO Voice setting 6575 * @note Using SCO packets of the exact length is required for USB transfer 6576 * @return Length of SCO packets in bytes (not audio frames) 6577 */ 6578 uint16_t hci_get_sco_packet_length(void){ 6579 uint16_t sco_packet_length = 0; 6580 6581 #ifdef ENABLE_SCO_OVER_HCI 6582 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6583 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6584 6585 if (hci_have_usb_transport()){ 6586 // see Core Spec for H2 USB Transfer. 6587 // 3 byte SCO header + 24 bytes per connection 6588 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6589 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6590 } else { 6591 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6592 sco_packet_length = 3 + 60 * multiplier; 6593 // assert that it still fits inside an SCO buffer 6594 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6595 sco_packet_length = 3 + 60; 6596 } 6597 } 6598 #endif 6599 6600 #ifdef HAVE_SCO_TRANSPORT 6601 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6602 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6603 sco_packet_length = 3 + 60 * multiplier; 6604 #endif 6605 return sco_packet_length; 6606 } 6607 6608 /** 6609 * @brief Sets the master/slave policy 6610 * @param policy (0: attempt to become master, 1: let connecting device decide) 6611 */ 6612 void hci_set_master_slave_policy(uint8_t policy){ 6613 hci_stack->master_slave_policy = policy; 6614 } 6615 6616 #endif 6617 6618 HCI_STATE hci_get_state(void){ 6619 return hci_stack->state; 6620 } 6621 6622 #ifdef ENABLE_CLASSIC 6623 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6624 hci_stack->gap_classic_accept_callback = accept_callback; 6625 } 6626 #endif 6627 6628 /** 6629 * @brief Set callback for Bluetooth Hardware Error 6630 */ 6631 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6632 hci_stack->hardware_error_callback = fn; 6633 } 6634 6635 void hci_disconnect_all(void){ 6636 btstack_linked_list_iterator_t it; 6637 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6638 while (btstack_linked_list_iterator_has_next(&it)){ 6639 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6640 if (con->state == SENT_DISCONNECT) continue; 6641 con->state = SEND_DISCONNECT; 6642 } 6643 hci_run(); 6644 } 6645 6646 uint16_t hci_get_manufacturer(void){ 6647 return hci_stack->manufacturer; 6648 } 6649 6650 #ifdef ENABLE_BLE 6651 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6652 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6653 if (!hci_con) return NULL; 6654 return &hci_con->sm_connection; 6655 } 6656 6657 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6658 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6659 #endif 6660 6661 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6662 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6663 if (hci_connection == NULL) return 0; 6664 if (hci_is_le_connection(hci_connection)){ 6665 #ifdef ENABLE_BLE 6666 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6667 if (sm_conn->sm_connection_encrypted) { 6668 return sm_conn->sm_actual_encryption_key_size; 6669 } 6670 #endif 6671 } else { 6672 #ifdef ENABLE_CLASSIC 6673 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6674 return hci_connection->encryption_key_size; 6675 } 6676 #endif 6677 } 6678 return 0; 6679 } 6680 6681 int gap_authenticated(hci_con_handle_t con_handle){ 6682 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6683 if (hci_connection == NULL) return 0; 6684 6685 switch (hci_connection->address_type){ 6686 #ifdef ENABLE_BLE 6687 case BD_ADDR_TYPE_LE_PUBLIC: 6688 case BD_ADDR_TYPE_LE_RANDOM: 6689 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6690 return hci_connection->sm_connection.sm_connection_authenticated; 6691 #endif 6692 #ifdef ENABLE_CLASSIC 6693 case BD_ADDR_TYPE_SCO: 6694 case BD_ADDR_TYPE_ACL: 6695 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6696 #endif 6697 default: 6698 return 0; 6699 } 6700 } 6701 6702 int gap_secure_connection(hci_con_handle_t con_handle){ 6703 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6704 if (hci_connection == NULL) return 0; 6705 6706 switch (hci_connection->address_type){ 6707 #ifdef ENABLE_BLE 6708 case BD_ADDR_TYPE_LE_PUBLIC: 6709 case BD_ADDR_TYPE_LE_RANDOM: 6710 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6711 return hci_connection->sm_connection.sm_connection_sc; 6712 #endif 6713 #ifdef ENABLE_CLASSIC 6714 case BD_ADDR_TYPE_SCO: 6715 case BD_ADDR_TYPE_ACL: 6716 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6717 #endif 6718 default: 6719 return 0; 6720 } 6721 } 6722 6723 bool gap_bonded(hci_con_handle_t con_handle){ 6724 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6725 if (hci_connection == NULL) return 0; 6726 6727 #ifdef ENABLE_CLASSIC 6728 link_key_t link_key; 6729 link_key_type_t link_key_type; 6730 #endif 6731 switch (hci_connection->address_type){ 6732 #ifdef ENABLE_BLE 6733 case BD_ADDR_TYPE_LE_PUBLIC: 6734 case BD_ADDR_TYPE_LE_RANDOM: 6735 return hci_connection->sm_connection.sm_le_db_index >= 0; 6736 #endif 6737 #ifdef ENABLE_CLASSIC 6738 case BD_ADDR_TYPE_SCO: 6739 case BD_ADDR_TYPE_ACL: 6740 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6741 #endif 6742 default: 6743 return false; 6744 } 6745 } 6746 6747 #ifdef ENABLE_BLE 6748 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6749 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6750 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6751 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6752 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6753 return sm_conn->sm_connection_authorization_state; 6754 } 6755 #endif 6756 6757 #ifdef ENABLE_CLASSIC 6758 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){ 6759 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6760 if (!conn) return GAP_CONNECTION_INVALID; 6761 conn->sniff_min_interval = sniff_min_interval; 6762 conn->sniff_max_interval = sniff_max_interval; 6763 conn->sniff_attempt = sniff_attempt; 6764 conn->sniff_timeout = sniff_timeout; 6765 hci_run(); 6766 return 0; 6767 } 6768 6769 /** 6770 * @brief Exit Sniff mode 6771 * @param con_handle 6772 @ @return 0 if ok 6773 */ 6774 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6775 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6776 if (!conn) return GAP_CONNECTION_INVALID; 6777 conn->sniff_min_interval = 0xffff; 6778 hci_run(); 6779 return 0; 6780 } 6781 6782 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){ 6783 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6784 if (!conn) return GAP_CONNECTION_INVALID; 6785 conn->sniff_subrating_max_latency = max_latency; 6786 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6787 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6788 hci_run(); 6789 return ERROR_CODE_SUCCESS; 6790 } 6791 6792 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){ 6793 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6794 if (!conn) return GAP_CONNECTION_INVALID; 6795 conn->qos_service_type = service_type; 6796 conn->qos_token_rate = token_rate; 6797 conn->qos_peak_bandwidth = peak_bandwidth; 6798 conn->qos_latency = latency; 6799 conn->qos_delay_variation = delay_variation; 6800 hci_run(); 6801 return ERROR_CODE_SUCCESS; 6802 } 6803 6804 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6805 hci_stack->new_page_scan_interval = page_scan_interval; 6806 hci_stack->new_page_scan_window = page_scan_window; 6807 hci_run(); 6808 } 6809 6810 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6811 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6812 hci_run(); 6813 } 6814 6815 #endif 6816 6817 void hci_halting_defer(void){ 6818 if (hci_stack->state != HCI_STATE_HALTING) return; 6819 switch (hci_stack->substate){ 6820 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6821 case HCI_HALTING_CLOSE: 6822 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6823 break; 6824 default: 6825 break; 6826 } 6827 } 6828 6829 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6830 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6831 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6832 if (le_device_db_index >= le_device_db_max_count()) return; 6833 uint8_t offset = le_device_db_index >> 3; 6834 uint8_t mask = 1 << (le_device_db_index & 7); 6835 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6836 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6837 // note: go back to remove entries, otherwise, a remove + add will skip the add 6838 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6839 } 6840 } 6841 6842 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6843 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6844 if (le_device_db_index >= le_device_db_max_count()) return; 6845 uint8_t offset = le_device_db_index >> 3; 6846 uint8_t mask = 1 << (le_device_db_index & 7); 6847 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6848 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6849 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6850 } 6851 } 6852 6853 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6854 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6855 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6856 } 6857 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6858 // restart le resolving list update 6859 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6860 } 6861 return ERROR_CODE_SUCCESS; 6862 } 6863 #endif 6864 6865 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6866 void hci_setup_test_connections_fuzz(void){ 6867 hci_connection_t * conn; 6868 6869 // default address: 66:55:44:33:00:01 6870 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6871 6872 // setup Controller info 6873 hci_stack->num_cmd_packets = 255; 6874 hci_stack->acl_packets_total_num = 255; 6875 6876 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6877 addr[5] = 0x01; 6878 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6879 conn->con_handle = addr[5]; 6880 conn->role = HCI_ROLE_SLAVE; 6881 conn->state = RECEIVED_CONNECTION_REQUEST; 6882 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6883 6884 // setup incoming Classic SCO connection with con handle 0x0002 6885 addr[5] = 0x02; 6886 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6887 conn->con_handle = addr[5]; 6888 conn->role = HCI_ROLE_SLAVE; 6889 conn->state = RECEIVED_CONNECTION_REQUEST; 6890 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6891 6892 // setup ready Classic ACL connection with con handle 0x0003 6893 addr[5] = 0x03; 6894 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6895 conn->con_handle = addr[5]; 6896 conn->role = HCI_ROLE_SLAVE; 6897 conn->state = OPEN; 6898 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6899 6900 // setup ready Classic SCO connection with con handle 0x0004 6901 addr[5] = 0x04; 6902 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6903 conn->con_handle = addr[5]; 6904 conn->role = HCI_ROLE_SLAVE; 6905 conn->state = OPEN; 6906 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6907 6908 // setup ready LE ACL connection with con handle 0x005 and public address 6909 addr[5] = 0x05; 6910 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6911 conn->con_handle = addr[5]; 6912 conn->role = HCI_ROLE_SLAVE; 6913 conn->state = OPEN; 6914 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6915 conn->sm_connection.sm_connection_encrypted = 1; 6916 } 6917 6918 void hci_free_connections_fuzz(void){ 6919 btstack_linked_list_iterator_t it; 6920 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6921 while (btstack_linked_list_iterator_has_next(&it)){ 6922 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6923 btstack_linked_list_iterator_remove(&it); 6924 btstack_memory_hci_connection_free(con); 6925 } 6926 } 6927 void hci_simulate_working_fuzz(void){ 6928 hci_init_done(); 6929 hci_stack->num_cmd_packets = 255; 6930 } 6931 #endif 6932