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 // get requested security level 2432 gap_security_level_t requested_security_level = conn->requested_security_level; 2433 if (hci_stack->gap_secure_connections_only_mode){ 2434 requested_security_level = LEVEL_4; 2435 } 2436 2437 // assess security: LEVEL 4 requires SC 2438 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2439 if ((requested_security_level == LEVEL_4) && 2440 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2441 !hci_remote_sc_enabled(conn)){ 2442 log_info("Level 4 required, but SC not supported -> abort"); 2443 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2444 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2445 return; 2446 } 2447 2448 // assess security based on io capabilities 2449 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2450 // responder: fully validate io caps of both sides as well as OOB data 2451 bool security_possible = false; 2452 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2453 2454 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2455 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2456 // so we merge the OOB data availability 2457 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2458 if (conn->classic_oob_c_192 != NULL){ 2459 have_oob_data |= 1; 2460 } 2461 if (conn->classic_oob_c_256 != NULL){ 2462 have_oob_data |= 2; 2463 } 2464 // for up to Level 3, either P-192 as well as P-256 will do 2465 // 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 2466 // if remote does not SC, we should not receive P-256 data either 2467 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2468 security_possible = true; 2469 } 2470 // for Level 4, P-256 is needed 2471 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2472 security_possible = true; 2473 } 2474 #endif 2475 2476 if (security_possible == false){ 2477 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2478 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2479 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2480 return; 2481 } 2482 } else { 2483 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2484 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2485 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2486 log_info("Level 3+ required, but no input/output -> abort"); 2487 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2488 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2489 return; 2490 } 2491 #endif 2492 } 2493 2494 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2495 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2496 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2497 } else { 2498 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2499 } 2500 #endif 2501 } 2502 2503 #endif 2504 2505 static void event_handler(uint8_t *packet, uint16_t size){ 2506 2507 uint16_t event_length = packet[1]; 2508 2509 // assert packet is complete 2510 if (size != (event_length + 2u)){ 2511 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2512 return; 2513 } 2514 2515 bd_addr_type_t addr_type; 2516 hci_con_handle_t handle; 2517 hci_connection_t * conn; 2518 int i; 2519 int create_connection_cmd; 2520 2521 #ifdef ENABLE_CLASSIC 2522 hci_link_type_t link_type; 2523 bd_addr_t addr; 2524 #endif 2525 2526 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2527 2528 switch (hci_event_packet_get_type(packet)) { 2529 2530 case HCI_EVENT_COMMAND_COMPLETE: 2531 handle_command_complete_event(packet, size); 2532 break; 2533 2534 case HCI_EVENT_COMMAND_STATUS: 2535 // get num cmd packets - limit to 1 to reduce complexity 2536 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2537 2538 // check command status to detected failed outgoing connections 2539 create_connection_cmd = 0; 2540 #ifdef ENABLE_CLASSIC 2541 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2542 create_connection_cmd = 1; 2543 } 2544 #endif 2545 #ifdef ENABLE_LE_CENTRAL 2546 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2547 create_connection_cmd = 1; 2548 } 2549 #endif 2550 if (create_connection_cmd) { 2551 uint8_t status = hci_event_command_status_get_status(packet); 2552 addr_type = hci_stack->outgoing_addr_type; 2553 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2554 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); 2555 2556 // reset outgoing address info 2557 memset(hci_stack->outgoing_addr, 0, 6); 2558 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2559 2560 // on error 2561 if (status != ERROR_CODE_SUCCESS){ 2562 #ifdef ENABLE_LE_CENTRAL 2563 if (hci_is_le_connection_type(addr_type)){ 2564 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2565 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2566 } 2567 #endif 2568 // error => outgoing connection failed 2569 if (conn != NULL){ 2570 hci_handle_connection_failed(conn, status); 2571 } 2572 } 2573 } 2574 2575 #ifdef ENABLE_CLASSIC 2576 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2577 uint8_t status = hci_event_command_status_get_status(packet); 2578 log_info("command status (inquiry), status %x", status); 2579 if (status == ERROR_CODE_SUCCESS) { 2580 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2581 } else { 2582 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2583 } 2584 } 2585 #endif 2586 break; 2587 2588 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2589 if (size < 3) return; 2590 uint16_t num_handles = packet[2]; 2591 if (size != (3u + num_handles * 4u)) return; 2592 uint16_t offset = 3; 2593 for (i=0; i<num_handles;i++){ 2594 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2595 offset += 2u; 2596 uint16_t num_packets = little_endian_read_16(packet, offset); 2597 offset += 2u; 2598 2599 conn = hci_connection_for_handle(handle); 2600 if (!conn){ 2601 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2602 continue; 2603 } 2604 2605 if (conn->num_packets_sent >= num_packets){ 2606 conn->num_packets_sent -= num_packets; 2607 } else { 2608 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2609 conn->num_packets_sent = 0; 2610 } 2611 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2612 2613 #ifdef ENABLE_CLASSIC 2614 // For SCO, we do the can_send_now_check here 2615 hci_notify_if_sco_can_send_now(); 2616 #endif 2617 } 2618 break; 2619 } 2620 2621 #ifdef ENABLE_CLASSIC 2622 case HCI_EVENT_INQUIRY_COMPLETE: 2623 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2624 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2625 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2626 hci_emit_event(event, sizeof(event), 1); 2627 } 2628 break; 2629 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2630 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2631 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2632 } 2633 break; 2634 case HCI_EVENT_CONNECTION_REQUEST: 2635 reverse_bd_addr(&packet[2], addr); 2636 link_type = (hci_link_type_t) packet[11]; 2637 2638 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2639 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2640 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2641 bd_addr_copy(hci_stack->decline_addr, addr); 2642 break; 2643 } 2644 2645 if (hci_stack->gap_classic_accept_callback != NULL){ 2646 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2647 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2648 bd_addr_copy(hci_stack->decline_addr, addr); 2649 break; 2650 } 2651 } 2652 2653 // TODO: eval COD 8-10 2654 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2655 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2656 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2657 if (!conn) { 2658 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2659 } 2660 if (!conn) { 2661 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2662 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2663 bd_addr_copy(hci_stack->decline_addr, addr); 2664 break; 2665 } 2666 conn->role = HCI_ROLE_SLAVE; 2667 conn->state = RECEIVED_CONNECTION_REQUEST; 2668 // store info about eSCO 2669 if (link_type == HCI_LINK_TYPE_ESCO){ 2670 conn->remote_supported_features[0] |= 1; 2671 } 2672 hci_run(); 2673 break; 2674 2675 case HCI_EVENT_CONNECTION_COMPLETE: 2676 // Connection management 2677 reverse_bd_addr(&packet[5], addr); 2678 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2679 addr_type = BD_ADDR_TYPE_ACL; 2680 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2681 if (conn) { 2682 if (!packet[2]){ 2683 conn->state = OPEN; 2684 conn->con_handle = little_endian_read_16(packet, 3); 2685 2686 // queue get remote feature 2687 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2688 2689 // queue set supervision timeout if we're master 2690 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2691 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2692 } 2693 2694 // restart timer 2695 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2696 btstack_run_loop_add_timer(&conn->timeout); 2697 2698 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2699 2700 hci_emit_nr_connections_changed(); 2701 } else { 2702 // connection failed 2703 hci_handle_connection_failed(conn, packet[2]); 2704 } 2705 } 2706 break; 2707 2708 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2709 reverse_bd_addr(&packet[5], addr); 2710 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2711 if (packet[2]){ 2712 // connection failed 2713 break; 2714 } 2715 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2716 if (!conn) { 2717 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2718 } 2719 if (!conn) { 2720 break; 2721 } 2722 conn->state = OPEN; 2723 conn->con_handle = little_endian_read_16(packet, 3); 2724 2725 #ifdef ENABLE_SCO_OVER_HCI 2726 // update SCO 2727 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2728 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2729 } 2730 // trigger can send now 2731 if (hci_have_usb_transport()){ 2732 hci_stack->sco_can_send_now = true; 2733 } 2734 #endif 2735 #ifdef HAVE_SCO_TRANSPORT 2736 // configure sco transport 2737 if (hci_stack->sco_transport != NULL){ 2738 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2739 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2740 } 2741 #endif 2742 break; 2743 2744 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2745 handle = little_endian_read_16(packet, 3); 2746 conn = hci_connection_for_handle(handle); 2747 if (!conn) break; 2748 if (!packet[2]){ 2749 const uint8_t * features = &packet[5]; 2750 hci_handle_remote_features_page_0(conn, features); 2751 2752 // read extended features if possible 2753 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2754 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2755 break; 2756 } 2757 } 2758 hci_handle_remote_features_received(conn); 2759 break; 2760 2761 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2762 handle = little_endian_read_16(packet, 3); 2763 conn = hci_connection_for_handle(handle); 2764 if (!conn) break; 2765 // status = ok, page = 1 2766 if (!packet[2]) { 2767 uint8_t page_number = packet[5]; 2768 uint8_t maximum_page_number = packet[6]; 2769 const uint8_t * features = &packet[7]; 2770 bool done = false; 2771 switch (page_number){ 2772 case 1: 2773 hci_handle_remote_features_page_1(conn, features); 2774 if (maximum_page_number >= 2){ 2775 // get Secure Connections (Controller) from Page 2 if available 2776 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2777 } else { 2778 // otherwise, assume SC (Controller) == SC (Host) 2779 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2780 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2781 } 2782 done = true; 2783 } 2784 break; 2785 case 2: 2786 hci_handle_remote_features_page_2(conn, features); 2787 done = true; 2788 break; 2789 default: 2790 break; 2791 } 2792 if (!done) break; 2793 } 2794 hci_handle_remote_features_received(conn); 2795 break; 2796 2797 case HCI_EVENT_LINK_KEY_REQUEST: 2798 // request handled by hci_run() 2799 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2800 break; 2801 2802 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2803 hci_event_link_key_request_get_bd_addr(packet, addr); 2804 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2805 if (!conn) break; 2806 2807 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2808 2809 // CVE-2020-26555: ignore NULL link key 2810 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2811 if (btstack_is_null(&packet[8], 16)) break; 2812 2813 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2814 // Change Connection Encryption keeps link key type 2815 if (link_key_type != CHANGED_COMBINATION_KEY){ 2816 conn->link_key_type = link_key_type; 2817 } 2818 2819 // cache link key. link keys stored in little-endian format for legacy reasons 2820 memcpy(&conn->link_key, &packet[8], 16); 2821 2822 // only store link key: 2823 // - if bondable enabled 2824 if (hci_stack->bondable == false) break; 2825 // - if security level sufficient 2826 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2827 // - for SSP, also check if remote side requested bonding as well 2828 if (conn->link_key_type != COMBINATION_KEY){ 2829 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2830 if (!remote_bonding){ 2831 break; 2832 } 2833 } 2834 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2835 break; 2836 } 2837 2838 case HCI_EVENT_PIN_CODE_REQUEST: 2839 hci_event_pin_code_request_get_bd_addr(packet, addr); 2840 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2841 if (!conn) break; 2842 2843 hci_pairing_started(conn, false); 2844 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2845 if (!hci_stack->bondable ){ 2846 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2847 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2848 hci_run(); 2849 return; 2850 } 2851 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2852 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2853 log_info("Level 4 required, but SC not supported -> abort"); 2854 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2855 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2856 hci_run(); 2857 return; 2858 } 2859 break; 2860 2861 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2862 hci_event_io_capability_response_get_bd_addr(packet, addr); 2863 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2864 if (!conn) break; 2865 2866 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2867 hci_pairing_started(conn, true); 2868 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2869 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2870 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2871 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2872 #endif 2873 break; 2874 2875 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2876 hci_event_io_capability_response_get_bd_addr(packet, addr); 2877 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2878 if (!conn) break; 2879 2880 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2881 hci_connection_timestamp(conn); 2882 hci_pairing_started(conn, true); 2883 break; 2884 2885 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2886 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2887 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2888 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2889 if (!conn) break; 2890 2891 hci_connection_timestamp(conn); 2892 2893 hci_pairing_started(conn, true); 2894 2895 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2896 break; 2897 #endif 2898 2899 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2900 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2901 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2902 if (!conn) break; 2903 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2904 if (hci_stack->ssp_auto_accept){ 2905 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2906 }; 2907 } else { 2908 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2909 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2910 // don't forward event to app 2911 hci_run(); 2912 return; 2913 } 2914 break; 2915 2916 case HCI_EVENT_USER_PASSKEY_REQUEST: 2917 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2918 if (hci_stack->ssp_auto_accept){ 2919 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2920 }; 2921 break; 2922 2923 case HCI_EVENT_MODE_CHANGE: 2924 handle = hci_event_mode_change_get_handle(packet); 2925 conn = hci_connection_for_handle(handle); 2926 if (!conn) break; 2927 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2928 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2929 break; 2930 #endif 2931 2932 case HCI_EVENT_ENCRYPTION_CHANGE: 2933 handle = hci_event_encryption_change_get_connection_handle(packet); 2934 conn = hci_connection_for_handle(handle); 2935 if (!conn) break; 2936 if (hci_event_encryption_change_get_status(packet) == 0u) { 2937 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2938 if (encryption_enabled){ 2939 if (hci_is_le_connection(conn)){ 2940 // For LE, we accept connection as encrypted 2941 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2942 } 2943 #ifdef ENABLE_CLASSIC 2944 else { 2945 2946 // dedicated bonding: send result and disconnect 2947 if (conn->bonding_flags & BONDING_DEDICATED){ 2948 conn->bonding_flags &= ~BONDING_DEDICATED; 2949 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2950 conn->bonding_status = packet[2]; 2951 break; 2952 } 2953 2954 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2955 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2956 bool connected_uses_aes_ccm = encryption_enabled == 2; 2957 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2958 log_info("SC during pairing, but only E0 now -> abort"); 2959 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2960 break; 2961 } 2962 2963 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2964 if (connected_uses_aes_ccm){ 2965 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2966 } 2967 2968 #ifdef ENABLE_TESTING_SUPPORT 2969 // work around for issue with PTS dongle 2970 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2971 #endif 2972 2973 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2974 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2975 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2976 } else { 2977 // if not, pretend everything is perfect 2978 hci_handle_read_encryption_key_size_complete(conn, 16); 2979 } 2980 } 2981 #endif 2982 } else { 2983 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2984 } 2985 } 2986 2987 break; 2988 2989 #ifdef ENABLE_CLASSIC 2990 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2991 handle = hci_event_authentication_complete_get_connection_handle(packet); 2992 conn = hci_connection_for_handle(handle); 2993 if (!conn) break; 2994 2995 // clear authentication active flag 2996 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2997 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2998 2999 // authenticated only if auth status == 0 3000 if (hci_event_authentication_complete_get_status(packet) == 0){ 3001 // authenticated 3002 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3003 3004 // If not already encrypted, start encryption 3005 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3006 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3007 break; 3008 } 3009 } 3010 3011 // emit updated security level 3012 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3013 break; 3014 3015 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3016 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3017 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3018 if (!conn) break; 3019 3020 // treat successfully paired connection as authenticated 3021 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3022 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3023 } 3024 3025 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3026 break; 3027 #endif 3028 3029 // HCI_EVENT_DISCONNECTION_COMPLETE 3030 // has been split, to first notify stack before shutting connection down 3031 // see end of function, too. 3032 case HCI_EVENT_DISCONNECTION_COMPLETE: 3033 if (packet[2]) break; // status != 0 3034 handle = little_endian_read_16(packet, 3); 3035 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3036 if (hci_stack->acl_fragmentation_total_size > 0u) { 3037 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3038 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3039 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3040 hci_stack->acl_fragmentation_total_size = 0; 3041 hci_stack->acl_fragmentation_pos = 0; 3042 if (release_buffer){ 3043 hci_release_packet_buffer(); 3044 } 3045 } 3046 } 3047 3048 conn = hci_connection_for_handle(handle); 3049 if (!conn) break; 3050 #ifdef ENABLE_CLASSIC 3051 // pairing failed if it was ongoing 3052 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3053 #endif 3054 // mark connection for shutdown 3055 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3056 3057 // emit dedicatd bonding event 3058 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3059 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3060 } 3061 3062 #ifdef ENABLE_BLE 3063 #ifdef ENABLE_LE_PERIPHERAL 3064 // re-enable advertisements for le connections if active 3065 if (hci_is_le_connection(conn)){ 3066 hci_update_advertisements_enabled_for_current_roles(); 3067 } 3068 #endif 3069 #endif 3070 break; 3071 3072 case HCI_EVENT_HARDWARE_ERROR: 3073 log_error("Hardware Error: 0x%02x", packet[2]); 3074 if (hci_stack->hardware_error_callback){ 3075 (*hci_stack->hardware_error_callback)(packet[2]); 3076 } else { 3077 // if no special requests, just reboot stack 3078 hci_power_control_off(); 3079 hci_power_control_on(); 3080 } 3081 break; 3082 3083 #ifdef ENABLE_CLASSIC 3084 case HCI_EVENT_ROLE_CHANGE: 3085 if (packet[2]) break; // status != 0 3086 reverse_bd_addr(&packet[3], addr); 3087 addr_type = BD_ADDR_TYPE_ACL; 3088 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3089 if (!conn) break; 3090 conn->role = packet[9]; 3091 break; 3092 #endif 3093 3094 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3095 // release packet buffer only for asynchronous transport and if there are not further fragements 3096 if (hci_transport_synchronous()) { 3097 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3098 return; // instead of break: to avoid re-entering hci_run() 3099 } 3100 hci_stack->acl_fragmentation_tx_active = 0; 3101 if (hci_stack->acl_fragmentation_total_size) break; 3102 hci_release_packet_buffer(); 3103 3104 // L2CAP receives this event via the hci_emit_event below 3105 3106 #ifdef ENABLE_CLASSIC 3107 // For SCO, we do the can_send_now_check here 3108 hci_notify_if_sco_can_send_now(); 3109 #endif 3110 break; 3111 3112 #ifdef ENABLE_CLASSIC 3113 case HCI_EVENT_SCO_CAN_SEND_NOW: 3114 // For SCO, we do the can_send_now_check here 3115 hci_stack->sco_can_send_now = true; 3116 hci_notify_if_sco_can_send_now(); 3117 return; 3118 3119 // explode inquriy results for easier consumption 3120 case HCI_EVENT_INQUIRY_RESULT: 3121 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3122 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3123 gap_inquiry_explode(packet, size); 3124 break; 3125 #endif 3126 3127 #ifdef ENABLE_BLE 3128 case HCI_EVENT_LE_META: 3129 switch (packet[2]){ 3130 #ifdef ENABLE_LE_CENTRAL 3131 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3132 // log_info("advertising report received"); 3133 if (!hci_stack->le_scanning_enabled) break; 3134 le_handle_advertisement_report(packet, size); 3135 break; 3136 #endif 3137 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3138 event_handle_le_connection_complete(packet); 3139 break; 3140 3141 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3142 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3143 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3144 conn = hci_connection_for_handle(handle); 3145 if (!conn) break; 3146 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3147 break; 3148 3149 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3150 // connection 3151 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3152 conn = hci_connection_for_handle(handle); 3153 if (conn) { 3154 // read arguments 3155 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3156 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3157 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3158 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3159 3160 // validate against current connection parameter range 3161 le_connection_parameter_range_t existing_range; 3162 gap_get_connection_parameter_range(&existing_range); 3163 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3164 if (update_parameter){ 3165 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3166 conn->le_conn_interval_min = le_conn_interval_min; 3167 conn->le_conn_interval_max = le_conn_interval_max; 3168 conn->le_conn_latency = le_conn_latency; 3169 conn->le_supervision_timeout = le_supervision_timeout; 3170 } else { 3171 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3172 } 3173 } 3174 break; 3175 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3176 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3177 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3178 conn = hci_connection_for_handle(handle); 3179 if (conn) { 3180 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3181 } 3182 break; 3183 #endif 3184 default: 3185 break; 3186 } 3187 break; 3188 #endif 3189 case HCI_EVENT_VENDOR_SPECIFIC: 3190 // Vendor specific commands often create vendor specific event instead of num completed packets 3191 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3192 switch (hci_stack->manufacturer){ 3193 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3194 hci_stack->num_cmd_packets = 1; 3195 break; 3196 default: 3197 break; 3198 } 3199 break; 3200 default: 3201 break; 3202 } 3203 3204 handle_event_for_current_stack_state(packet, size); 3205 3206 // notify upper stack 3207 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3208 3209 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3210 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3211 handle = little_endian_read_16(packet, 3); 3212 hci_connection_t * aConn = hci_connection_for_handle(handle); 3213 // discard connection if app did not trigger a reconnect in the event handler 3214 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3215 hci_shutdown_connection(aConn); 3216 } 3217 } 3218 3219 // execute main loop 3220 hci_run(); 3221 } 3222 3223 #ifdef ENABLE_CLASSIC 3224 3225 #ifdef ENABLE_SCO_OVER_HCI 3226 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3227 static void sco_schedule_tx(hci_connection_t * conn); 3228 3229 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3230 log_debug("SCO TX Timeout"); 3231 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3232 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3233 if (!conn) return; 3234 3235 // trigger send 3236 conn->sco_tx_ready = 1; 3237 // extra packet if CVSD but SCO buffer is too short 3238 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3239 conn->sco_tx_ready++; 3240 } 3241 hci_notify_if_sco_can_send_now(); 3242 } 3243 3244 3245 #define SCO_TX_AFTER_RX_MS (6) 3246 3247 static void sco_schedule_tx(hci_connection_t * conn){ 3248 3249 uint32_t now = btstack_run_loop_get_time_ms(); 3250 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3251 int time_delta_ms = sco_tx_ms - now; 3252 3253 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3254 3255 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3256 btstack_run_loop_remove_timer(timer); 3257 btstack_run_loop_set_timer(timer, time_delta_ms); 3258 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3259 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3260 btstack_run_loop_add_timer(timer); 3261 } 3262 #endif 3263 3264 static void sco_handler(uint8_t * packet, uint16_t size){ 3265 // lookup connection struct 3266 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3267 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3268 if (!conn) return; 3269 3270 #ifdef ENABLE_SCO_OVER_HCI 3271 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3272 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3273 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3274 packet[2] = 0x3c; 3275 memmove(&packet[3], &packet[23], 63); 3276 size = 63; 3277 } 3278 } 3279 3280 if (hci_have_usb_transport()){ 3281 // Nothing to do 3282 } else { 3283 // 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); 3284 if (hci_stack->synchronous_flow_control_enabled == 0){ 3285 uint32_t now = btstack_run_loop_get_time_ms(); 3286 3287 if (!conn->sco_rx_valid){ 3288 // ignore first 10 packets 3289 conn->sco_rx_count++; 3290 // log_debug("sco rx count %u", conn->sco_rx_count); 3291 if (conn->sco_rx_count == 10) { 3292 // use first timestamp as is and pretent it just started 3293 conn->sco_rx_ms = now; 3294 conn->sco_rx_valid = 1; 3295 conn->sco_rx_count = 0; 3296 sco_schedule_tx(conn); 3297 } 3298 } else { 3299 // track expected arrival timme 3300 conn->sco_rx_count++; 3301 conn->sco_rx_ms += 7; 3302 int delta = (int32_t) (now - conn->sco_rx_ms); 3303 if (delta > 0){ 3304 conn->sco_rx_ms++; 3305 } 3306 // log_debug("sco rx %u", conn->sco_rx_ms); 3307 sco_schedule_tx(conn); 3308 } 3309 } 3310 } 3311 #endif 3312 3313 // deliver to app 3314 if (hci_stack->sco_packet_handler) { 3315 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3316 } 3317 3318 #ifdef HAVE_SCO_TRANSPORT 3319 // We can send one packet for each received packet 3320 conn->sco_tx_ready++; 3321 hci_notify_if_sco_can_send_now(); 3322 #endif 3323 3324 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3325 conn->num_packets_completed++; 3326 hci_stack->host_completed_packets = 1; 3327 hci_run(); 3328 #endif 3329 } 3330 #endif 3331 3332 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3333 hci_dump_packet(packet_type, 1, packet, size); 3334 switch (packet_type) { 3335 case HCI_EVENT_PACKET: 3336 event_handler(packet, size); 3337 break; 3338 case HCI_ACL_DATA_PACKET: 3339 acl_handler(packet, size); 3340 break; 3341 #ifdef ENABLE_CLASSIC 3342 case HCI_SCO_DATA_PACKET: 3343 sco_handler(packet, size); 3344 break; 3345 #endif 3346 default: 3347 break; 3348 } 3349 } 3350 3351 /** 3352 * @brief Add event packet handler. 3353 */ 3354 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3355 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3356 } 3357 3358 3359 /** Register HCI packet handlers */ 3360 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3361 hci_stack->acl_packet_handler = handler; 3362 } 3363 3364 #ifdef ENABLE_CLASSIC 3365 /** 3366 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3367 */ 3368 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3369 hci_stack->sco_packet_handler = handler; 3370 } 3371 #endif 3372 3373 static void hci_state_reset(void){ 3374 // no connections yet 3375 hci_stack->connections = NULL; 3376 3377 // keep discoverable/connectable as this has been requested by the client(s) 3378 // hci_stack->discoverable = 0; 3379 // hci_stack->connectable = 0; 3380 // hci_stack->bondable = 1; 3381 // hci_stack->own_addr_type = 0; 3382 3383 // buffer is free 3384 hci_stack->hci_packet_buffer_reserved = false; 3385 3386 // no pending cmds 3387 hci_stack->decline_reason = 0; 3388 hci_stack->new_scan_enable_value = 0xff; 3389 3390 hci_stack->secure_connections_active = false; 3391 3392 #ifdef ENABLE_CLASSIC 3393 hci_stack->new_page_scan_interval = 0xffff; 3394 hci_stack->new_page_scan_window = 0xffff; 3395 hci_stack->new_page_scan_type = 0xff; 3396 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3397 hci_stack->gap_tasks = 3398 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3399 GAP_TASK_SET_CLASS_OF_DEVICE | 3400 GAP_TASK_SET_LOCAL_NAME | 3401 GAP_TASK_SET_EIR_DATA; 3402 #endif 3403 3404 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3405 hci_stack->classic_read_local_oob_data = true; 3406 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3407 #endif 3408 3409 // LE 3410 #ifdef ENABLE_BLE 3411 memset(hci_stack->le_random_address, 0, 6); 3412 hci_stack->le_random_address_set = 0; 3413 #endif 3414 #ifdef ENABLE_LE_CENTRAL 3415 hci_stack->le_scanning_active = false; 3416 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3417 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3418 hci_stack->le_whitelist_capacity = 0; 3419 #endif 3420 #ifdef ENABLE_LE_PERIPHERAL 3421 hci_stack->le_advertisements_active = false; 3422 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3423 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3424 } 3425 if (hci_stack->le_advertisements_data != NULL){ 3426 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3427 } 3428 #endif 3429 } 3430 3431 #ifdef ENABLE_CLASSIC 3432 /** 3433 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3434 */ 3435 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3436 // store and open remote device db 3437 hci_stack->link_key_db = link_key_db; 3438 if (hci_stack->link_key_db) { 3439 hci_stack->link_key_db->open(); 3440 } 3441 } 3442 #endif 3443 3444 void hci_init(const hci_transport_t *transport, const void *config){ 3445 3446 #ifdef HAVE_MALLOC 3447 if (!hci_stack) { 3448 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3449 } 3450 #else 3451 hci_stack = &hci_stack_static; 3452 #endif 3453 memset(hci_stack, 0, sizeof(hci_stack_t)); 3454 3455 // reference to use transport layer implementation 3456 hci_stack->hci_transport = transport; 3457 3458 // reference to used config 3459 hci_stack->config = config; 3460 3461 // setup pointer for outgoing packet buffer 3462 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3463 3464 // max acl payload size defined in config.h 3465 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3466 3467 // register packet handlers with transport 3468 transport->register_packet_handler(&packet_handler); 3469 3470 hci_stack->state = HCI_STATE_OFF; 3471 3472 // class of device 3473 hci_stack->class_of_device = 0x007a020c; // Smartphone 3474 3475 // bondable by default 3476 hci_stack->bondable = 1; 3477 3478 #ifdef ENABLE_CLASSIC 3479 // classic name 3480 hci_stack->local_name = default_classic_name; 3481 3482 // Master slave policy 3483 hci_stack->master_slave_policy = 1; 3484 3485 // Allow Role Switch 3486 hci_stack->allow_role_switch = 1; 3487 3488 // Default / minimum security level = 2 3489 hci_stack->gap_security_level = LEVEL_2; 3490 3491 // Default Security Mode 4 3492 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3493 3494 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3495 hci_stack->gap_required_encyrption_key_size = 7; 3496 3497 // Link Supervision Timeout 3498 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3499 3500 #endif 3501 3502 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3503 hci_stack->ssp_enable = 1; 3504 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3505 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3506 hci_stack->ssp_auto_accept = 1; 3507 3508 // Secure Connections: enable (requires support from Controller) 3509 hci_stack->secure_connections_enable = true; 3510 3511 // voice setting - signed 16 bit pcm data with CVSD over the air 3512 hci_stack->sco_voice_setting = 0x60; 3513 3514 #ifdef ENABLE_LE_CENTRAL 3515 // connection parameter to use for outgoing connections 3516 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3517 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3518 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3519 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3520 hci_stack->le_connection_latency = 4; // 4 3521 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3522 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3523 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3524 3525 // default LE Scanning 3526 hci_stack->le_scan_type = 0x1; // active 3527 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3528 hci_stack->le_scan_window = 0x30; // 30 ms 3529 #endif 3530 3531 #ifdef ENABLE_LE_PERIPHERAL 3532 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3533 #endif 3534 3535 // connection parameter range used to answer connection parameter update requests in l2cap 3536 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3537 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3538 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3539 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3540 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3541 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3542 3543 hci_state_reset(); 3544 } 3545 3546 void hci_deinit(void){ 3547 #ifdef HAVE_MALLOC 3548 if (hci_stack) { 3549 free(hci_stack); 3550 } 3551 #endif 3552 hci_stack = NULL; 3553 3554 #ifdef ENABLE_CLASSIC 3555 disable_l2cap_timeouts = 0; 3556 #endif 3557 } 3558 3559 /** 3560 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3561 */ 3562 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3563 hci_stack->chipset = chipset_driver; 3564 3565 // reset chipset driver - init is also called on power_up 3566 if (hci_stack->chipset && hci_stack->chipset->init){ 3567 hci_stack->chipset->init(hci_stack->config); 3568 } 3569 } 3570 3571 /** 3572 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3573 */ 3574 void hci_set_control(const btstack_control_t *hardware_control){ 3575 // references to used control implementation 3576 hci_stack->control = hardware_control; 3577 // init with transport config 3578 hardware_control->init(hci_stack->config); 3579 } 3580 3581 void hci_close(void){ 3582 3583 #ifdef ENABLE_CLASSIC 3584 // close remote device db 3585 if (hci_stack->link_key_db) { 3586 hci_stack->link_key_db->close(); 3587 } 3588 #endif 3589 3590 btstack_linked_list_iterator_t lit; 3591 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3592 while (btstack_linked_list_iterator_has_next(&lit)){ 3593 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3594 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3595 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3596 hci_shutdown_connection(connection); 3597 } 3598 3599 hci_power_control(HCI_POWER_OFF); 3600 3601 #ifdef HAVE_MALLOC 3602 free(hci_stack); 3603 #endif 3604 hci_stack = NULL; 3605 } 3606 3607 #ifdef HAVE_SCO_TRANSPORT 3608 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3609 hci_stack->sco_transport = sco_transport; 3610 sco_transport->register_packet_handler(&packet_handler); 3611 } 3612 #endif 3613 3614 #ifdef ENABLE_CLASSIC 3615 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3616 // validate ranage and set 3617 if (encryption_key_size < 7) return; 3618 if (encryption_key_size > 16) return; 3619 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3620 } 3621 3622 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3623 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3624 hci_stack->gap_security_mode = security_mode; 3625 return ERROR_CODE_SUCCESS; 3626 } else { 3627 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3628 } 3629 } 3630 3631 gap_security_mode_t gap_get_security_mode(void){ 3632 return hci_stack->gap_security_mode; 3633 } 3634 3635 void gap_set_security_level(gap_security_level_t security_level){ 3636 hci_stack->gap_security_level = security_level; 3637 } 3638 3639 gap_security_level_t gap_get_security_level(void){ 3640 if (hci_stack->gap_secure_connections_only_mode){ 3641 return LEVEL_4; 3642 } 3643 return hci_stack->gap_security_level; 3644 } 3645 3646 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3647 hci_stack->gap_minimal_service_security_level = security_level; 3648 } 3649 3650 void gap_set_secure_connections_only_mode(bool enable){ 3651 hci_stack->gap_secure_connections_only_mode = enable; 3652 } 3653 3654 bool gap_get_secure_connections_only_mode(void){ 3655 return hci_stack->gap_secure_connections_only_mode; 3656 } 3657 #endif 3658 3659 #ifdef ENABLE_CLASSIC 3660 void gap_set_class_of_device(uint32_t class_of_device){ 3661 hci_stack->class_of_device = class_of_device; 3662 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3663 hci_run(); 3664 } 3665 3666 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3667 hci_stack->default_link_policy_settings = default_link_policy_settings; 3668 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3669 hci_run(); 3670 } 3671 3672 void gap_set_allow_role_switch(bool allow_role_switch){ 3673 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3674 } 3675 3676 uint8_t hci_get_allow_role_switch(void){ 3677 return hci_stack->allow_role_switch; 3678 } 3679 3680 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3681 hci_stack->link_supervision_timeout = link_supervision_timeout; 3682 } 3683 3684 void hci_disable_l2cap_timeout_check(void){ 3685 disable_l2cap_timeouts = 1; 3686 } 3687 #endif 3688 3689 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3690 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3691 void hci_set_bd_addr(bd_addr_t addr){ 3692 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3693 hci_stack->custom_bd_addr_set = 1; 3694 } 3695 #endif 3696 3697 // State-Module-Driver overview 3698 // state module low-level 3699 // HCI_STATE_OFF off close 3700 // HCI_STATE_INITIALIZING, on open 3701 // HCI_STATE_WORKING, on open 3702 // HCI_STATE_HALTING, on open 3703 // HCI_STATE_SLEEPING, off/sleep close 3704 // HCI_STATE_FALLING_ASLEEP on open 3705 3706 static int hci_power_control_on(void){ 3707 3708 // power on 3709 int err = 0; 3710 if (hci_stack->control && hci_stack->control->on){ 3711 err = (*hci_stack->control->on)(); 3712 } 3713 if (err){ 3714 log_error( "POWER_ON failed"); 3715 hci_emit_hci_open_failed(); 3716 return err; 3717 } 3718 3719 // int chipset driver 3720 if (hci_stack->chipset && hci_stack->chipset->init){ 3721 hci_stack->chipset->init(hci_stack->config); 3722 } 3723 3724 // init transport 3725 if (hci_stack->hci_transport->init){ 3726 hci_stack->hci_transport->init(hci_stack->config); 3727 } 3728 3729 // open transport 3730 err = hci_stack->hci_transport->open(); 3731 if (err){ 3732 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3733 if (hci_stack->control && hci_stack->control->off){ 3734 (*hci_stack->control->off)(); 3735 } 3736 hci_emit_hci_open_failed(); 3737 return err; 3738 } 3739 return 0; 3740 } 3741 3742 static void hci_power_control_off(void){ 3743 3744 log_info("hci_power_control_off"); 3745 3746 // close low-level device 3747 hci_stack->hci_transport->close(); 3748 3749 log_info("hci_power_control_off - hci_transport closed"); 3750 3751 // power off 3752 if (hci_stack->control && hci_stack->control->off){ 3753 (*hci_stack->control->off)(); 3754 } 3755 3756 log_info("hci_power_control_off - control closed"); 3757 3758 hci_stack->state = HCI_STATE_OFF; 3759 } 3760 3761 static void hci_power_control_sleep(void){ 3762 3763 log_info("hci_power_control_sleep"); 3764 3765 #if 0 3766 // don't close serial port during sleep 3767 3768 // close low-level device 3769 hci_stack->hci_transport->close(hci_stack->config); 3770 #endif 3771 3772 // sleep mode 3773 if (hci_stack->control && hci_stack->control->sleep){ 3774 (*hci_stack->control->sleep)(); 3775 } 3776 3777 hci_stack->state = HCI_STATE_SLEEPING; 3778 } 3779 3780 static int hci_power_control_wake(void){ 3781 3782 log_info("hci_power_control_wake"); 3783 3784 // wake on 3785 if (hci_stack->control && hci_stack->control->wake){ 3786 (*hci_stack->control->wake)(); 3787 } 3788 3789 #if 0 3790 // open low-level device 3791 int err = hci_stack->hci_transport->open(hci_stack->config); 3792 if (err){ 3793 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3794 if (hci_stack->control && hci_stack->control->off){ 3795 (*hci_stack->control->off)(); 3796 } 3797 hci_emit_hci_open_failed(); 3798 return err; 3799 } 3800 #endif 3801 3802 return 0; 3803 } 3804 3805 static void hci_power_transition_to_initializing(void){ 3806 // set up state machine 3807 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3808 hci_stack->hci_packet_buffer_reserved = false; 3809 hci_stack->state = HCI_STATE_INITIALIZING; 3810 hci_stack->substate = HCI_INIT_SEND_RESET; 3811 } 3812 3813 // returns error 3814 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3815 int err; 3816 switch (power_mode){ 3817 case HCI_POWER_ON: 3818 err = hci_power_control_on(); 3819 if (err != 0) { 3820 log_error("hci_power_control_on() error %d", err); 3821 return err; 3822 } 3823 hci_power_transition_to_initializing(); 3824 break; 3825 case HCI_POWER_OFF: 3826 // do nothing 3827 break; 3828 case HCI_POWER_SLEEP: 3829 // do nothing (with SLEEP == OFF) 3830 break; 3831 default: 3832 btstack_assert(false); 3833 break; 3834 } 3835 return ERROR_CODE_SUCCESS; 3836 } 3837 3838 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3839 switch (power_mode){ 3840 case HCI_POWER_ON: 3841 // do nothing 3842 break; 3843 case HCI_POWER_OFF: 3844 // no connections yet, just turn it off 3845 hci_power_control_off(); 3846 break; 3847 case HCI_POWER_SLEEP: 3848 // no connections yet, just turn it off 3849 hci_power_control_sleep(); 3850 break; 3851 default: 3852 btstack_assert(false); 3853 break; 3854 } 3855 return ERROR_CODE_SUCCESS; 3856 } 3857 3858 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3859 switch (power_mode){ 3860 case HCI_POWER_ON: 3861 // do nothing 3862 break; 3863 case HCI_POWER_OFF: 3864 // see hci_run 3865 hci_stack->state = HCI_STATE_HALTING; 3866 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3867 break; 3868 case HCI_POWER_SLEEP: 3869 // see hci_run 3870 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3871 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3872 break; 3873 default: 3874 btstack_assert(false); 3875 break; 3876 } 3877 return ERROR_CODE_SUCCESS; 3878 } 3879 3880 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3881 switch (power_mode){ 3882 case HCI_POWER_ON: 3883 hci_power_transition_to_initializing(); 3884 break; 3885 case HCI_POWER_OFF: 3886 // do nothing 3887 break; 3888 case HCI_POWER_SLEEP: 3889 // see hci_run 3890 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3891 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3892 break; 3893 default: 3894 btstack_assert(false); 3895 break; 3896 } 3897 return ERROR_CODE_SUCCESS; 3898 } 3899 3900 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3901 switch (power_mode){ 3902 case HCI_POWER_ON: 3903 3904 #ifdef HAVE_PLATFORM_IPHONE_OS 3905 // nothing to do, if H4 supports power management 3906 if (btstack_control_iphone_power_management_enabled()){ 3907 hci_stack->state = HCI_STATE_INITIALIZING; 3908 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3909 break; 3910 } 3911 #endif 3912 hci_power_transition_to_initializing(); 3913 break; 3914 case HCI_POWER_OFF: 3915 // see hci_run 3916 hci_stack->state = HCI_STATE_HALTING; 3917 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3918 break; 3919 case HCI_POWER_SLEEP: 3920 // do nothing 3921 break; 3922 default: 3923 btstack_assert(false); 3924 break; 3925 } 3926 return ERROR_CODE_SUCCESS; 3927 } 3928 3929 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3930 int err; 3931 switch (power_mode){ 3932 case HCI_POWER_ON: 3933 #ifdef HAVE_PLATFORM_IPHONE_OS 3934 // nothing to do, if H4 supports power management 3935 if (btstack_control_iphone_power_management_enabled()){ 3936 hci_stack->state = HCI_STATE_INITIALIZING; 3937 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3938 hci_update_scan_enable(); 3939 break; 3940 } 3941 #endif 3942 err = hci_power_control_wake(); 3943 if (err) return err; 3944 hci_power_transition_to_initializing(); 3945 break; 3946 case HCI_POWER_OFF: 3947 hci_stack->state = HCI_STATE_HALTING; 3948 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3949 break; 3950 case HCI_POWER_SLEEP: 3951 // do nothing 3952 break; 3953 default: 3954 btstack_assert(false); 3955 break; 3956 } 3957 return ERROR_CODE_SUCCESS; 3958 } 3959 3960 int hci_power_control(HCI_POWER_MODE power_mode){ 3961 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3962 int err = 0; 3963 switch (hci_stack->state){ 3964 case HCI_STATE_OFF: 3965 err = hci_power_control_state_off(power_mode); 3966 break; 3967 case HCI_STATE_INITIALIZING: 3968 err = hci_power_control_state_initializing(power_mode); 3969 break; 3970 case HCI_STATE_WORKING: 3971 err = hci_power_control_state_working(power_mode); 3972 break; 3973 case HCI_STATE_HALTING: 3974 err = hci_power_control_state_halting(power_mode); 3975 break; 3976 case HCI_STATE_FALLING_ASLEEP: 3977 err = hci_power_control_state_falling_asleep(power_mode); 3978 break; 3979 case HCI_STATE_SLEEPING: 3980 err = hci_power_control_state_sleeping(power_mode); 3981 break; 3982 default: 3983 btstack_assert(false); 3984 break; 3985 } 3986 if (err != 0){ 3987 return err; 3988 } 3989 3990 // create internal event 3991 hci_emit_state(); 3992 3993 // trigger next/first action 3994 hci_run(); 3995 3996 return 0; 3997 } 3998 3999 4000 #ifdef ENABLE_CLASSIC 4001 4002 static void hci_update_scan_enable(void){ 4003 // 2 = page scan, 1 = inq scan 4004 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4005 hci_run(); 4006 } 4007 4008 void gap_discoverable_control(uint8_t enable){ 4009 if (enable) enable = 1; // normalize argument 4010 4011 if (hci_stack->discoverable == enable){ 4012 hci_emit_discoverable_enabled(hci_stack->discoverable); 4013 return; 4014 } 4015 4016 hci_stack->discoverable = enable; 4017 hci_update_scan_enable(); 4018 } 4019 4020 void gap_connectable_control(uint8_t enable){ 4021 if (enable) enable = 1; // normalize argument 4022 4023 // don't emit event 4024 if (hci_stack->connectable == enable) return; 4025 4026 hci_stack->connectable = enable; 4027 hci_update_scan_enable(); 4028 } 4029 #endif 4030 4031 void gap_local_bd_addr(bd_addr_t address_buffer){ 4032 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4033 } 4034 4035 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4036 static void hci_host_num_completed_packets(void){ 4037 4038 // create packet manually as arrays are not supported and num_commands should not get reduced 4039 hci_reserve_packet_buffer(); 4040 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4041 4042 uint16_t size = 0; 4043 uint16_t num_handles = 0; 4044 packet[size++] = 0x35; 4045 packet[size++] = 0x0c; 4046 size++; // skip param len 4047 size++; // skip num handles 4048 4049 // add { handle, packets } entries 4050 btstack_linked_item_t * it; 4051 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4052 hci_connection_t * connection = (hci_connection_t *) it; 4053 if (connection->num_packets_completed){ 4054 little_endian_store_16(packet, size, connection->con_handle); 4055 size += 2; 4056 little_endian_store_16(packet, size, connection->num_packets_completed); 4057 size += 2; 4058 // 4059 num_handles++; 4060 connection->num_packets_completed = 0; 4061 } 4062 } 4063 4064 packet[2] = size - 3; 4065 packet[3] = num_handles; 4066 4067 hci_stack->host_completed_packets = 0; 4068 4069 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4070 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4071 4072 // release packet buffer for synchronous transport implementations 4073 if (hci_transport_synchronous()){ 4074 hci_release_packet_buffer(); 4075 hci_emit_transport_packet_sent(); 4076 } 4077 } 4078 #endif 4079 4080 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4081 UNUSED(ds); 4082 hci_stack->substate = HCI_HALTING_CLOSE; 4083 // allow packet handlers to defer final shutdown 4084 hci_emit_state(); 4085 hci_run(); 4086 } 4087 4088 static bool hci_run_acl_fragments(void){ 4089 if (hci_stack->acl_fragmentation_total_size > 0u) { 4090 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4091 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4092 if (connection) { 4093 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4094 hci_send_acl_packet_fragments(connection); 4095 return true; 4096 } 4097 } else { 4098 // connection gone -> discard further fragments 4099 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4100 hci_stack->acl_fragmentation_total_size = 0; 4101 hci_stack->acl_fragmentation_pos = 0; 4102 } 4103 } 4104 return false; 4105 } 4106 4107 #ifdef ENABLE_CLASSIC 4108 static bool hci_run_general_gap_classic(void){ 4109 4110 // assert stack is working and classic is active 4111 if (hci_classic_supported() == false) return false; 4112 if (hci_stack->state != HCI_STATE_WORKING) return false; 4113 4114 // decline incoming connections 4115 if (hci_stack->decline_reason){ 4116 uint8_t reason = hci_stack->decline_reason; 4117 hci_stack->decline_reason = 0; 4118 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4119 return true; 4120 } 4121 4122 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4123 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4124 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4125 return true; 4126 } 4127 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4128 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4129 gap_run_set_local_name(); 4130 return true; 4131 } 4132 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4133 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4134 gap_run_set_eir_data(); 4135 return true; 4136 } 4137 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4138 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4139 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4140 return true; 4141 } 4142 // write page scan activity 4143 if (hci_stack->new_page_scan_interval != 0xffff) { 4144 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4145 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4146 hci_stack->new_page_scan_interval = 0xffff; 4147 hci_stack->new_page_scan_window = 0xffff; 4148 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4149 return true; 4150 } 4151 // write page scan type 4152 if (hci_stack->new_page_scan_type != 0xff) { 4153 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4154 hci_stack->new_page_scan_type = 0xff; 4155 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4156 return true; 4157 } 4158 // send scan enable 4159 if (hci_stack->new_scan_enable_value != 0xff) { 4160 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4161 hci_stack->new_scan_enable_value = 0xff; 4162 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4163 return true; 4164 } 4165 4166 // start/stop inquiry 4167 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4168 uint8_t duration = hci_stack->inquiry_state; 4169 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4170 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4171 return true; 4172 } 4173 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4174 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4175 hci_send_cmd(&hci_inquiry_cancel); 4176 return true; 4177 } 4178 // remote name request 4179 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4180 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4181 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4182 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4183 return true; 4184 } 4185 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4186 // Local OOB data 4187 if (hci_stack->classic_read_local_oob_data){ 4188 hci_stack->classic_read_local_oob_data = false; 4189 if (hci_stack->local_supported_commands[1] & 0x10u){ 4190 hci_send_cmd(&hci_read_local_extended_oob_data); 4191 } else { 4192 hci_send_cmd(&hci_read_local_oob_data); 4193 } 4194 } 4195 #endif 4196 // pairing 4197 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4198 uint8_t state = hci_stack->gap_pairing_state; 4199 uint8_t pin_code[16]; 4200 switch (state){ 4201 case GAP_PAIRING_STATE_SEND_PIN: 4202 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4203 memset(pin_code, 0, 16); 4204 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4205 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4206 break; 4207 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4208 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4209 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4210 break; 4211 case GAP_PAIRING_STATE_SEND_PASSKEY: 4212 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4213 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4214 break; 4215 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4216 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4217 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4218 break; 4219 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4220 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4221 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4222 break; 4223 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4224 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4225 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4226 break; 4227 default: 4228 break; 4229 } 4230 return true; 4231 } 4232 return false; 4233 } 4234 #endif 4235 4236 #ifdef ENABLE_BLE 4237 static bool hci_run_general_gap_le(void){ 4238 4239 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4240 4241 if (hci_stack->state != HCI_STATE_WORKING) return false; 4242 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4243 4244 4245 // Phase 1: collect what to stop 4246 4247 bool scanning_stop = false; 4248 bool connecting_stop = false; 4249 bool advertising_stop = false; 4250 4251 #ifndef ENABLE_LE_CENTRAL 4252 UNUSED(scanning_stop); 4253 UNUSED(connecting_stop); 4254 #endif 4255 #ifndef ENABLE_LE_PERIPHERAL 4256 UNUSED(advertising_stop); 4257 #endif 4258 4259 // check if whitelist needs modification 4260 bool whitelist_modification_pending = false; 4261 btstack_linked_list_iterator_t lit; 4262 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4263 while (btstack_linked_list_iterator_has_next(&lit)){ 4264 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4265 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4266 whitelist_modification_pending = true; 4267 break; 4268 } 4269 } 4270 // check if resolving list needs modification 4271 bool resolving_list_modification_pending = false; 4272 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4273 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4274 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4275 resolving_list_modification_pending = true; 4276 } 4277 #endif 4278 4279 #ifdef ENABLE_LE_CENTRAL 4280 // scanning control 4281 if (hci_stack->le_scanning_active) { 4282 // stop if: 4283 // - parameter change required 4284 // - it's disabled 4285 // - whitelist change required but used for scanning 4286 // - resolving list modified 4287 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4288 if ((hci_stack->le_scanning_param_update) || 4289 !hci_stack->le_scanning_enabled || 4290 scanning_uses_whitelist || 4291 resolving_list_modification_pending){ 4292 4293 scanning_stop = true; 4294 } 4295 } 4296 #endif 4297 4298 #ifdef ENABLE_LE_CENTRAL 4299 // connecting control 4300 bool connecting_with_whitelist; 4301 switch (hci_stack->le_connecting_state){ 4302 case LE_CONNECTING_DIRECT: 4303 case LE_CONNECTING_WHITELIST: 4304 // stop connecting if: 4305 // - connecting uses white and whitelist modification pending 4306 // - if it got disabled 4307 // - resolving list modified 4308 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4309 if ((connecting_with_whitelist && whitelist_modification_pending) || 4310 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4311 resolving_list_modification_pending) { 4312 4313 connecting_stop = true; 4314 } 4315 break; 4316 default: 4317 break; 4318 } 4319 #endif 4320 4321 #ifdef ENABLE_LE_PERIPHERAL 4322 // le advertisement control 4323 if (hci_stack->le_advertisements_active){ 4324 // stop if: 4325 // - parameter change required 4326 // - it's disabled 4327 // - whitelist change required but used for advertisement filter policy 4328 // - resolving list modified 4329 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4330 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4331 if (advertising_change || 4332 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4333 (advertising_uses_whitelist & whitelist_modification_pending) || 4334 resolving_list_modification_pending) { 4335 4336 advertising_stop = true; 4337 } 4338 } 4339 #endif 4340 4341 4342 // Phase 2: stop everything that should be off during modifications 4343 4344 #ifdef ENABLE_LE_CENTRAL 4345 if (scanning_stop){ 4346 hci_stack->le_scanning_active = false; 4347 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4348 return true; 4349 } 4350 #endif 4351 4352 #ifdef ENABLE_LE_CENTRAL 4353 if (connecting_stop){ 4354 hci_send_cmd(&hci_le_create_connection_cancel); 4355 return true; 4356 } 4357 #endif 4358 4359 #ifdef ENABLE_LE_PERIPHERAL 4360 if (advertising_stop){ 4361 hci_stack->le_advertisements_active = false; 4362 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4363 return true; 4364 } 4365 #endif 4366 4367 // Phase 3: modify 4368 4369 #ifdef ENABLE_LE_CENTRAL 4370 if (hci_stack->le_scanning_param_update){ 4371 hci_stack->le_scanning_param_update = false; 4372 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4373 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4374 return true; 4375 } 4376 #endif 4377 4378 #ifdef ENABLE_LE_PERIPHERAL 4379 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4380 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4381 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4382 hci_send_cmd(&hci_le_set_advertising_parameters, 4383 hci_stack->le_advertisements_interval_min, 4384 hci_stack->le_advertisements_interval_max, 4385 hci_stack->le_advertisements_type, 4386 hci_stack->le_advertisements_own_addr_type, 4387 hci_stack->le_advertisements_direct_address_type, 4388 hci_stack->le_advertisements_direct_address, 4389 hci_stack->le_advertisements_channel_map, 4390 hci_stack->le_advertisements_filter_policy); 4391 return true; 4392 } 4393 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4394 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4395 uint8_t adv_data_clean[31]; 4396 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4397 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4398 hci_stack->le_advertisements_data_len); 4399 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4400 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4401 return true; 4402 } 4403 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4404 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4405 uint8_t scan_data_clean[31]; 4406 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4407 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4408 hci_stack->le_scan_response_data_len); 4409 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4410 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4411 return true; 4412 } 4413 #endif 4414 4415 4416 #ifdef ENABLE_LE_CENTRAL 4417 // if connect with whitelist was active and is not cancelled yet, wait until next time 4418 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4419 #endif 4420 4421 // LE Whitelist Management 4422 if (whitelist_modification_pending){ 4423 // add/remove entries 4424 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4425 while (btstack_linked_list_iterator_has_next(&lit)){ 4426 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4427 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4428 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4429 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4430 return true; 4431 } 4432 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4433 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4434 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4435 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4436 return true; 4437 } 4438 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4439 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4440 btstack_memory_whitelist_entry_free(entry); 4441 } 4442 } 4443 } 4444 4445 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4446 // LE Resolving List Management 4447 if (resolving_list_supported) { 4448 uint16_t i; 4449 switch (hci_stack->le_resolving_list_state) { 4450 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4451 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4452 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4453 return true; 4454 case LE_RESOLVING_LIST_READ_SIZE: 4455 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4456 hci_send_cmd(&hci_le_read_resolving_list_size); 4457 return true; 4458 case LE_RESOLVING_LIST_SEND_CLEAR: 4459 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4460 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4461 sizeof(hci_stack->le_resolving_list_add_entries)); 4462 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4463 sizeof(hci_stack->le_resolving_list_remove_entries)); 4464 hci_send_cmd(&hci_le_clear_resolving_list); 4465 return true; 4466 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4467 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4468 uint8_t offset = i >> 3; 4469 uint8_t mask = 1 << (i & 7); 4470 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4471 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4472 bd_addr_t peer_identity_addreses; 4473 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4474 sm_key_t peer_irk; 4475 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4476 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4477 4478 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4479 // trigger whitelist entry 'update' (work around for controller bug) 4480 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4481 while (btstack_linked_list_iterator_has_next(&lit)) { 4482 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4483 if (entry->address_type != peer_identity_addr_type) continue; 4484 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4485 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4486 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4487 } 4488 #endif 4489 4490 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4491 peer_identity_addreses); 4492 return true; 4493 } 4494 4495 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4496 4497 /* fall through */ 4498 4499 case LE_RESOLVING_LIST_ADD_ENTRIES: 4500 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4501 uint8_t offset = i >> 3; 4502 uint8_t mask = 1 << (i & 7); 4503 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4504 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4505 bd_addr_t peer_identity_addreses; 4506 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4507 sm_key_t peer_irk; 4508 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4509 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4510 const uint8_t *local_irk = gap_get_persistent_irk(); 4511 // command uses format specifier 'P' that stores 16-byte value without flip 4512 uint8_t local_irk_flipped[16]; 4513 uint8_t peer_irk_flipped[16]; 4514 reverse_128(local_irk, local_irk_flipped); 4515 reverse_128(peer_irk, peer_irk_flipped); 4516 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4517 peer_irk_flipped, local_irk_flipped); 4518 return true; 4519 } 4520 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4521 break; 4522 4523 default: 4524 break; 4525 } 4526 } 4527 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4528 #endif 4529 4530 // Phase 4: restore state 4531 4532 #ifdef ENABLE_LE_CENTRAL 4533 // re-start scanning 4534 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4535 hci_stack->le_scanning_active = true; 4536 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4537 return true; 4538 } 4539 #endif 4540 4541 #ifdef ENABLE_LE_CENTRAL 4542 // re-start connecting 4543 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4544 bd_addr_t null_addr; 4545 memset(null_addr, 0, 6); 4546 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4547 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4548 hci_send_cmd(&hci_le_create_connection, 4549 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4550 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4551 1, // use whitelist 4552 0, // peer address type 4553 null_addr, // peer bd addr 4554 hci_stack->le_connection_own_addr_type, // our addr type: 4555 hci_stack->le_connection_interval_min, // conn interval min 4556 hci_stack->le_connection_interval_max, // conn interval max 4557 hci_stack->le_connection_latency, // conn latency 4558 hci_stack->le_supervision_timeout, // conn latency 4559 hci_stack->le_minimum_ce_length, // min ce length 4560 hci_stack->le_maximum_ce_length // max ce length 4561 ); 4562 return true; 4563 } 4564 #endif 4565 4566 #ifdef ENABLE_LE_PERIPHERAL 4567 // re-start advertising 4568 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4569 // check if advertisements should be enabled given 4570 hci_stack->le_advertisements_active = true; 4571 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4572 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4573 return true; 4574 } 4575 #endif 4576 4577 return false; 4578 } 4579 #endif 4580 4581 static bool hci_run_general_pending_commands(void){ 4582 btstack_linked_item_t * it; 4583 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4584 hci_connection_t * connection = (hci_connection_t *) it; 4585 4586 switch(connection->state){ 4587 case SEND_CREATE_CONNECTION: 4588 switch(connection->address_type){ 4589 #ifdef ENABLE_CLASSIC 4590 case BD_ADDR_TYPE_ACL: 4591 log_info("sending hci_create_connection"); 4592 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4593 break; 4594 #endif 4595 default: 4596 #ifdef ENABLE_BLE 4597 #ifdef ENABLE_LE_CENTRAL 4598 log_info("sending hci_le_create_connection"); 4599 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4600 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4601 hci_send_cmd(&hci_le_create_connection, 4602 hci_stack->le_connection_scan_interval, // conn scan interval 4603 hci_stack->le_connection_scan_window, // conn scan windows 4604 0, // don't use whitelist 4605 connection->address_type, // peer address type 4606 connection->address, // peer bd addr 4607 hci_stack->le_connection_own_addr_type, // our addr type: 4608 hci_stack->le_connection_interval_min, // conn interval min 4609 hci_stack->le_connection_interval_max, // conn interval max 4610 hci_stack->le_connection_latency, // conn latency 4611 hci_stack->le_supervision_timeout, // conn latency 4612 hci_stack->le_minimum_ce_length, // min ce length 4613 hci_stack->le_maximum_ce_length // max ce length 4614 ); 4615 connection->state = SENT_CREATE_CONNECTION; 4616 #endif 4617 #endif 4618 break; 4619 } 4620 return true; 4621 4622 #ifdef ENABLE_CLASSIC 4623 case RECEIVED_CONNECTION_REQUEST: 4624 connection->role = HCI_ROLE_SLAVE; 4625 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4626 log_info("sending hci_accept_connection_request"); 4627 connection->state = ACCEPTED_CONNECTION_REQUEST; 4628 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4629 } 4630 return true; 4631 #endif 4632 4633 #ifdef ENABLE_BLE 4634 #ifdef ENABLE_LE_CENTRAL 4635 case SEND_CANCEL_CONNECTION: 4636 connection->state = SENT_CANCEL_CONNECTION; 4637 hci_send_cmd(&hci_le_create_connection_cancel); 4638 return true; 4639 #endif 4640 #endif 4641 case SEND_DISCONNECT: 4642 connection->state = SENT_DISCONNECT; 4643 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4644 return true; 4645 4646 default: 4647 break; 4648 } 4649 4650 // no further commands if connection is about to get shut down 4651 if (connection->state == SENT_DISCONNECT) continue; 4652 4653 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4654 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4655 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4656 return true; 4657 } 4658 4659 #ifdef ENABLE_CLASSIC 4660 4661 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4662 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4663 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4664 return true; 4665 } 4666 4667 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4668 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4669 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4670 return true; 4671 } 4672 4673 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4674 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4675 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4676 return true; 4677 } 4678 4679 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4680 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4681 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4682 return true; 4683 } 4684 4685 // Handling link key request requires remote supported features 4686 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4687 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4688 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4689 4690 // lookup link key using cached key first 4691 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4692 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4693 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4694 } 4695 4696 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4697 if (have_link_key && security_level_sufficient){ 4698 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4699 } else { 4700 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4701 } 4702 return true; 4703 } 4704 4705 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4706 log_info("denying to pin request"); 4707 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4708 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4709 return true; 4710 } 4711 4712 // security assessment requires remote features 4713 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4714 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4715 hci_ssp_assess_security_on_io_cap_request(connection); 4716 // 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 4717 } 4718 4719 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4720 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4721 // set authentication requirements: 4722 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4723 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4724 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4725 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4726 authreq |= 1; 4727 } 4728 bool bonding = hci_stack->bondable; 4729 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4730 // if we have received IO Cap Response, we're in responder role 4731 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4732 if (bonding && !remote_bonding){ 4733 log_info("Remote not bonding, dropping local flag"); 4734 bonding = false; 4735 } 4736 } 4737 if (bonding){ 4738 if (connection->bonding_flags & BONDING_DEDICATED){ 4739 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4740 } else { 4741 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4742 } 4743 } 4744 uint8_t have_oob_data = 0; 4745 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4746 if (connection->classic_oob_c_192 != NULL){ 4747 have_oob_data |= 1; 4748 } 4749 if (connection->classic_oob_c_256 != NULL){ 4750 have_oob_data |= 2; 4751 } 4752 #endif 4753 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4754 return true; 4755 } 4756 4757 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4758 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4759 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4760 return true; 4761 } 4762 4763 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4764 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4765 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4766 const uint8_t zero[16] = { 0 }; 4767 const uint8_t * r_192 = zero; 4768 const uint8_t * c_192 = zero; 4769 const uint8_t * r_256 = zero; 4770 const uint8_t * c_256 = zero; 4771 // verify P-256 OOB 4772 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4773 c_256 = connection->classic_oob_c_256; 4774 if (connection->classic_oob_r_256 != NULL) { 4775 r_256 = connection->classic_oob_r_256; 4776 } 4777 } 4778 // verify P-192 OOB 4779 if ((connection->classic_oob_c_192 != NULL)) { 4780 c_192 = connection->classic_oob_c_192; 4781 if (connection->classic_oob_r_192 != NULL) { 4782 r_192 = connection->classic_oob_r_192; 4783 } 4784 } 4785 4786 // assess security 4787 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4788 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4789 if (need_level_4 && !can_reach_level_4){ 4790 log_info("Level 4 required, but not possible -> abort"); 4791 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4792 // send oob negative reply 4793 c_256 = NULL; 4794 c_192 = NULL; 4795 } 4796 4797 // Reply 4798 if (c_256 != zero) { 4799 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4800 } else if (c_192 != zero){ 4801 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4802 } else { 4803 hci_stack->classic_oob_con_handle = connection->con_handle; 4804 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4805 } 4806 return true; 4807 } 4808 #endif 4809 4810 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4811 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4812 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4813 return true; 4814 } 4815 4816 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4817 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4818 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4819 return true; 4820 } 4821 4822 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4823 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4824 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4825 return true; 4826 } 4827 4828 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4829 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4830 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4831 connection->state = SENT_DISCONNECT; 4832 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4833 return true; 4834 } 4835 4836 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4837 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4838 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4839 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4840 return true; 4841 } 4842 4843 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4844 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4845 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4846 return true; 4847 } 4848 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4849 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4850 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4851 return true; 4852 } 4853 #endif 4854 4855 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4856 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4857 #ifdef ENABLE_CLASSIC 4858 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4859 #endif 4860 if (connection->state != SENT_DISCONNECT){ 4861 connection->state = SENT_DISCONNECT; 4862 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4863 return true; 4864 } 4865 } 4866 4867 #ifdef ENABLE_CLASSIC 4868 uint16_t sniff_min_interval; 4869 switch (connection->sniff_min_interval){ 4870 case 0: 4871 break; 4872 case 0xffff: 4873 connection->sniff_min_interval = 0; 4874 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4875 return true; 4876 default: 4877 sniff_min_interval = connection->sniff_min_interval; 4878 connection->sniff_min_interval = 0; 4879 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4880 return true; 4881 } 4882 4883 if (connection->sniff_subrating_max_latency != 0xffff){ 4884 uint16_t max_latency = connection->sniff_subrating_max_latency; 4885 connection->sniff_subrating_max_latency = 0; 4886 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4887 return true; 4888 } 4889 4890 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4891 uint8_t service_type = (uint8_t) connection->qos_service_type; 4892 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4893 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); 4894 return true; 4895 } 4896 4897 if (connection->request_role != HCI_ROLE_INVALID){ 4898 hci_role_t role = connection->request_role; 4899 connection->request_role = HCI_ROLE_INVALID; 4900 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4901 return true; 4902 } 4903 #endif 4904 4905 #ifdef ENABLE_BLE 4906 switch (connection->le_con_parameter_update_state){ 4907 // response to L2CAP CON PARAMETER UPDATE REQUEST 4908 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4909 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4910 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4911 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4912 0x0000, 0xffff); 4913 return true; 4914 case CON_PARAMETER_UPDATE_REPLY: 4915 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4916 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4917 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4918 0x0000, 0xffff); 4919 return true; 4920 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4921 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4922 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4923 return true; 4924 default: 4925 break; 4926 } 4927 if (connection->le_phy_update_all_phys != 0xffu){ 4928 uint8_t all_phys = connection->le_phy_update_all_phys; 4929 connection->le_phy_update_all_phys = 0xff; 4930 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); 4931 return true; 4932 } 4933 #endif 4934 } 4935 return false; 4936 } 4937 4938 static void hci_run(void){ 4939 4940 bool done; 4941 4942 // send continuation fragments first, as they block the prepared packet buffer 4943 done = hci_run_acl_fragments(); 4944 if (done) return; 4945 4946 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4947 // send host num completed packets next as they don't require num_cmd_packets > 0 4948 if (!hci_can_send_comand_packet_transport()) return; 4949 if (hci_stack->host_completed_packets){ 4950 hci_host_num_completed_packets(); 4951 return; 4952 } 4953 #endif 4954 4955 if (!hci_can_send_command_packet_now()) return; 4956 4957 // global/non-connection oriented commands 4958 4959 4960 #ifdef ENABLE_CLASSIC 4961 // general gap classic 4962 done = hci_run_general_gap_classic(); 4963 if (done) return; 4964 #endif 4965 4966 #ifdef ENABLE_BLE 4967 // general gap le 4968 done = hci_run_general_gap_le(); 4969 if (done) return; 4970 #endif 4971 4972 // send pending HCI commands 4973 done = hci_run_general_pending_commands(); 4974 if (done) return; 4975 4976 // stack state sub statemachines 4977 hci_connection_t * connection; 4978 switch (hci_stack->state){ 4979 case HCI_STATE_INITIALIZING: 4980 hci_initializing_run(); 4981 break; 4982 4983 case HCI_STATE_HALTING: 4984 4985 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4986 switch (hci_stack->substate){ 4987 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4988 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4989 4990 #ifdef ENABLE_BLE 4991 #ifdef ENABLE_LE_CENTRAL 4992 // free whitelist entries 4993 { 4994 btstack_linked_list_iterator_t lit; 4995 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4996 while (btstack_linked_list_iterator_has_next(&lit)){ 4997 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4998 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4999 btstack_memory_whitelist_entry_free(entry); 5000 } 5001 } 5002 #endif 5003 #endif 5004 // close all open connections 5005 connection = (hci_connection_t *) hci_stack->connections; 5006 if (connection){ 5007 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5008 if (!hci_can_send_command_packet_now()) return; 5009 5010 // check state 5011 if (connection->state == SENT_DISCONNECT) return; 5012 connection->state = SENT_DISCONNECT; 5013 5014 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5015 5016 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5017 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5018 5019 // ... which would be ignored anyway as we shutdown (free) the connection now 5020 hci_shutdown_connection(connection); 5021 5022 // finally, send the disconnect command 5023 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5024 return; 5025 } 5026 5027 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5028 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5029 log_info("HCI_STATE_HALTING: wait 50 ms"); 5030 hci_stack->substate = HCI_HALTING_W4_TIMER; 5031 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5032 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5033 btstack_run_loop_add_timer(&hci_stack->timeout); 5034 break; 5035 } 5036 5037 /* fall through */ 5038 5039 case HCI_HALTING_CLOSE: 5040 log_info("HCI_STATE_HALTING, calling off"); 5041 5042 // switch mode 5043 hci_power_control_off(); 5044 5045 log_info("HCI_STATE_HALTING, emitting state"); 5046 hci_emit_state(); 5047 log_info("HCI_STATE_HALTING, done"); 5048 break; 5049 5050 case HCI_HALTING_W4_TIMER: 5051 // keep waiting 5052 5053 break; 5054 default: 5055 break; 5056 } 5057 5058 break; 5059 5060 case HCI_STATE_FALLING_ASLEEP: 5061 switch(hci_stack->substate) { 5062 case HCI_FALLING_ASLEEP_DISCONNECT: 5063 log_info("HCI_STATE_FALLING_ASLEEP"); 5064 // close all open connections 5065 connection = (hci_connection_t *) hci_stack->connections; 5066 5067 #ifdef HAVE_PLATFORM_IPHONE_OS 5068 // don't close connections, if H4 supports power management 5069 if (btstack_control_iphone_power_management_enabled()){ 5070 connection = NULL; 5071 } 5072 #endif 5073 if (connection){ 5074 5075 // send disconnect 5076 if (!hci_can_send_command_packet_now()) return; 5077 5078 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5079 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5080 5081 // send disconnected event right away - causes higher layer connections to get closed, too. 5082 hci_shutdown_connection(connection); 5083 return; 5084 } 5085 5086 if (hci_classic_supported()){ 5087 // disable page and inquiry scan 5088 if (!hci_can_send_command_packet_now()) return; 5089 5090 log_info("HCI_STATE_HALTING, disabling inq scans"); 5091 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5092 5093 // continue in next sub state 5094 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5095 break; 5096 } 5097 5098 /* fall through */ 5099 5100 case HCI_FALLING_ASLEEP_COMPLETE: 5101 log_info("HCI_STATE_HALTING, calling sleep"); 5102 #ifdef HAVE_PLATFORM_IPHONE_OS 5103 // don't actually go to sleep, if H4 supports power management 5104 if (btstack_control_iphone_power_management_enabled()){ 5105 // SLEEP MODE reached 5106 hci_stack->state = HCI_STATE_SLEEPING; 5107 hci_emit_state(); 5108 break; 5109 } 5110 #endif 5111 // switch mode 5112 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5113 hci_emit_state(); 5114 break; 5115 5116 default: 5117 break; 5118 } 5119 break; 5120 5121 default: 5122 break; 5123 } 5124 } 5125 5126 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5127 // house-keeping 5128 5129 #ifdef ENABLE_CLASSIC 5130 bd_addr_t addr; 5131 hci_connection_t * conn; 5132 #endif 5133 #ifdef ENABLE_LE_CENTRAL 5134 uint8_t initiator_filter_policy; 5135 #endif 5136 5137 uint16_t opcode = little_endian_read_16(packet, 0); 5138 switch (opcode) { 5139 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5140 hci_stack->loopback_mode = packet[3]; 5141 break; 5142 5143 #ifdef ENABLE_CLASSIC 5144 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5145 reverse_bd_addr(&packet[3], addr); 5146 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5147 5148 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5149 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5150 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5151 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5152 } 5153 5154 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5155 if (!conn) { 5156 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5157 if (!conn) { 5158 // notify client that alloc failed 5159 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5160 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5161 } 5162 conn->state = SEND_CREATE_CONNECTION; 5163 conn->role = HCI_ROLE_MASTER; 5164 } 5165 log_info("conn state %u", conn->state); 5166 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5167 switch (conn->state) { 5168 // if connection active exists 5169 case OPEN: 5170 // and OPEN, emit connection complete command 5171 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5172 // packet not sent to controller 5173 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5174 case RECEIVED_DISCONNECTION_COMPLETE: 5175 // create connection triggered in disconnect complete event, let's do it now 5176 break; 5177 case SEND_CREATE_CONNECTION: 5178 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5179 break; 5180 default: 5181 // otherwise, just ignore as it is already in the open process 5182 // packet not sent to controller 5183 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5184 } 5185 conn->state = SENT_CREATE_CONNECTION; 5186 5187 // track outgoing connection 5188 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5189 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5190 break; 5191 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5192 if (hci_stack->link_key_db) { 5193 reverse_bd_addr(&packet[3], addr); 5194 hci_stack->link_key_db->delete_link_key(addr); 5195 } 5196 break; 5197 5198 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5199 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5200 // setup_synchronous_connection? Voice setting at offset 22 5201 // TODO: compare to current setting if sco connection already active 5202 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5203 break; 5204 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5205 // accept_synchronus_connection? Voice setting at offset 18 5206 // TODO: compare to current setting if sco connection already active 5207 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5208 break; 5209 #endif 5210 #endif 5211 5212 #ifdef ENABLE_BLE 5213 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5214 hci_stack->le_random_address_set = 1; 5215 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5216 break; 5217 #ifdef ENABLE_LE_PERIPHERAL 5218 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5219 hci_stack->le_advertisements_active = packet[3] != 0; 5220 break; 5221 #endif 5222 #ifdef ENABLE_LE_CENTRAL 5223 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5224 // white list used? 5225 initiator_filter_policy = packet[7]; 5226 switch (initiator_filter_policy) { 5227 case 0: 5228 // whitelist not used 5229 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5230 break; 5231 case 1: 5232 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5233 break; 5234 default: 5235 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5236 break; 5237 } 5238 // track outgoing connection 5239 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5240 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5241 break; 5242 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5243 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5244 break; 5245 #endif 5246 #endif 5247 default: 5248 break; 5249 } 5250 5251 hci_stack->num_cmd_packets--; 5252 5253 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5254 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5255 if (err != 0){ 5256 return ERROR_CODE_HARDWARE_FAILURE; 5257 } 5258 return ERROR_CODE_SUCCESS; 5259 } 5260 5261 // disconnect because of security block 5262 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5263 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5264 if (!connection) return; 5265 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5266 } 5267 5268 5269 // Configure Secure Simple Pairing 5270 5271 #ifdef ENABLE_CLASSIC 5272 5273 // enable will enable SSP during init 5274 void gap_ssp_set_enable(int enable){ 5275 hci_stack->ssp_enable = enable; 5276 } 5277 5278 static int hci_local_ssp_activated(void){ 5279 return gap_ssp_supported() && hci_stack->ssp_enable; 5280 } 5281 5282 // if set, BTstack will respond to io capability request using authentication requirement 5283 void gap_ssp_set_io_capability(int io_capability){ 5284 hci_stack->ssp_io_capability = io_capability; 5285 } 5286 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5287 hci_stack->ssp_authentication_requirement = authentication_requirement; 5288 } 5289 5290 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5291 void gap_ssp_set_auto_accept(int auto_accept){ 5292 hci_stack->ssp_auto_accept = auto_accept; 5293 } 5294 5295 void gap_secure_connections_enable(bool enable){ 5296 hci_stack->secure_connections_enable = enable; 5297 } 5298 5299 #endif 5300 5301 // va_list part of hci_send_cmd 5302 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5303 if (!hci_can_send_command_packet_now()){ 5304 log_error("hci_send_cmd called but cannot send packet now"); 5305 return ERROR_CODE_COMMAND_DISALLOWED; 5306 } 5307 5308 // for HCI INITIALIZATION 5309 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5310 hci_stack->last_cmd_opcode = cmd->opcode; 5311 5312 hci_reserve_packet_buffer(); 5313 uint8_t * packet = hci_stack->hci_packet_buffer; 5314 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5315 uint8_t status = hci_send_cmd_packet(packet, size); 5316 5317 // release packet buffer on error or for synchronous transport implementations 5318 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5319 hci_release_packet_buffer(); 5320 hci_emit_transport_packet_sent(); 5321 } 5322 5323 return status; 5324 } 5325 5326 /** 5327 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5328 */ 5329 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5330 va_list argptr; 5331 va_start(argptr, cmd); 5332 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5333 va_end(argptr); 5334 return status; 5335 } 5336 5337 // Create various non-HCI events. 5338 // TODO: generalize, use table similar to hci_create_command 5339 5340 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5341 // dump packet 5342 if (dump) { 5343 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5344 } 5345 5346 // dispatch to all event handlers 5347 btstack_linked_list_iterator_t it; 5348 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5349 while (btstack_linked_list_iterator_has_next(&it)){ 5350 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5351 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5352 } 5353 } 5354 5355 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5356 if (!hci_stack->acl_packet_handler) return; 5357 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5358 } 5359 5360 #ifdef ENABLE_CLASSIC 5361 static void hci_notify_if_sco_can_send_now(void){ 5362 // notify SCO sender if waiting 5363 if (!hci_stack->sco_waiting_for_can_send_now) return; 5364 if (hci_can_send_sco_packet_now()){ 5365 hci_stack->sco_waiting_for_can_send_now = 0; 5366 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5367 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5368 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5369 } 5370 } 5371 5372 // parsing end emitting has been merged to reduce code size 5373 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5374 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5375 5376 uint8_t * eir_data; 5377 ad_context_t context; 5378 const uint8_t * name; 5379 uint8_t name_len; 5380 5381 if (size < 3) return; 5382 5383 int event_type = hci_event_packet_get_type(packet); 5384 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5385 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5386 5387 switch (event_type){ 5388 case HCI_EVENT_INQUIRY_RESULT: 5389 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5390 if (size != (3 + (num_responses * 14))) return; 5391 break; 5392 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5393 if (size != 257) return; 5394 if (num_responses != 1) return; 5395 break; 5396 default: 5397 return; 5398 } 5399 5400 // event[1] is set at the end 5401 int i; 5402 for (i=0; i<num_responses;i++){ 5403 memset(event, 0, sizeof(event)); 5404 event[0] = GAP_EVENT_INQUIRY_RESULT; 5405 uint8_t event_size = 27; // if name is not set by EIR 5406 5407 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5408 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5409 (void)memcpy(&event[9], 5410 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5411 3); // class of device 5412 (void)memcpy(&event[12], 5413 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5414 2); // clock offset 5415 5416 switch (event_type){ 5417 case HCI_EVENT_INQUIRY_RESULT: 5418 // 14,15,16,17 = 0, size 18 5419 break; 5420 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5421 event[14] = 1; 5422 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5423 // 16,17 = 0, size 18 5424 break; 5425 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5426 event[14] = 1; 5427 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5428 // EIR packets only contain a single inquiry response 5429 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5430 name = NULL; 5431 // Iterate over EIR data 5432 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5433 uint8_t data_type = ad_iterator_get_data_type(&context); 5434 uint8_t data_size = ad_iterator_get_data_len(&context); 5435 const uint8_t * data = ad_iterator_get_data(&context); 5436 // Prefer Complete Local Name over Shortened Local Name 5437 switch (data_type){ 5438 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5439 if (name) continue; 5440 /* fall through */ 5441 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5442 name = data; 5443 name_len = data_size; 5444 break; 5445 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5446 if (data_size != 8) break; 5447 event[16] = 1; 5448 memcpy(&event[17], data, 8); 5449 break; 5450 default: 5451 break; 5452 } 5453 } 5454 if (name){ 5455 event[25] = 1; 5456 // truncate name if needed 5457 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5458 event[26] = len; 5459 (void)memcpy(&event[27], name, len); 5460 event_size += len; 5461 } 5462 break; 5463 default: 5464 return; 5465 } 5466 event[1] = event_size - 2; 5467 hci_emit_event(event, event_size, 1); 5468 } 5469 } 5470 #endif 5471 5472 void hci_emit_state(void){ 5473 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5474 uint8_t event[3]; 5475 event[0] = BTSTACK_EVENT_STATE; 5476 event[1] = sizeof(event) - 2u; 5477 event[2] = hci_stack->state; 5478 hci_emit_event(event, sizeof(event), 1); 5479 } 5480 5481 #ifdef ENABLE_CLASSIC 5482 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5483 uint8_t event[13]; 5484 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5485 event[1] = sizeof(event) - 2; 5486 event[2] = status; 5487 little_endian_store_16(event, 3, con_handle); 5488 reverse_bd_addr(address, &event[5]); 5489 event[11] = 1; // ACL connection 5490 event[12] = 0; // encryption disabled 5491 hci_emit_event(event, sizeof(event), 1); 5492 } 5493 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5494 if (disable_l2cap_timeouts) return; 5495 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5496 uint8_t event[4]; 5497 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5498 event[1] = sizeof(event) - 2; 5499 little_endian_store_16(event, 2, conn->con_handle); 5500 hci_emit_event(event, sizeof(event), 1); 5501 } 5502 #endif 5503 5504 #ifdef ENABLE_BLE 5505 #ifdef ENABLE_LE_CENTRAL 5506 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){ 5507 uint8_t event[21]; 5508 event[0] = HCI_EVENT_LE_META; 5509 event[1] = sizeof(event) - 2u; 5510 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5511 event[3] = status; 5512 little_endian_store_16(event, 4, con_handle); 5513 event[6] = 0; // TODO: role 5514 event[7] = address_type; 5515 reverse_bd_addr(address, &event[8]); 5516 little_endian_store_16(event, 14, 0); // interval 5517 little_endian_store_16(event, 16, 0); // latency 5518 little_endian_store_16(event, 18, 0); // supervision timeout 5519 event[20] = 0; // master clock accuracy 5520 hci_emit_event(event, sizeof(event), 1); 5521 } 5522 #endif 5523 #endif 5524 5525 static void hci_emit_transport_packet_sent(void){ 5526 // notify upper stack that it might be possible to send again 5527 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5528 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5529 } 5530 5531 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5532 uint8_t event[6]; 5533 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5534 event[1] = sizeof(event) - 2u; 5535 event[2] = 0; // status = OK 5536 little_endian_store_16(event, 3, con_handle); 5537 event[5] = reason; 5538 hci_emit_event(event, sizeof(event), 1); 5539 } 5540 5541 static void hci_emit_nr_connections_changed(void){ 5542 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5543 uint8_t event[3]; 5544 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5545 event[1] = sizeof(event) - 2u; 5546 event[2] = nr_hci_connections(); 5547 hci_emit_event(event, sizeof(event), 1); 5548 } 5549 5550 static void hci_emit_hci_open_failed(void){ 5551 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5552 uint8_t event[2]; 5553 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5554 event[1] = sizeof(event) - 2u; 5555 hci_emit_event(event, sizeof(event), 1); 5556 } 5557 5558 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5559 log_info("hci_emit_dedicated_bonding_result %u ", status); 5560 uint8_t event[9]; 5561 int pos = 0; 5562 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5563 event[pos++] = sizeof(event) - 2u; 5564 event[pos++] = status; 5565 reverse_bd_addr(address, &event[pos]); 5566 hci_emit_event(event, sizeof(event), 1); 5567 } 5568 5569 5570 #ifdef ENABLE_CLASSIC 5571 5572 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5573 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5574 uint8_t event[5]; 5575 int pos = 0; 5576 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5577 event[pos++] = sizeof(event) - 2; 5578 little_endian_store_16(event, 2, con_handle); 5579 pos += 2; 5580 event[pos++] = level; 5581 hci_emit_event(event, sizeof(event), 1); 5582 } 5583 5584 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5585 if (!connection) return LEVEL_0; 5586 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5587 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5588 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5589 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5590 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5591 // LEVEL 4 always requires 128 bit encrytion key size 5592 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5593 security_level = LEVEL_3; 5594 } 5595 return security_level; 5596 } 5597 5598 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5599 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5600 uint8_t event[3]; 5601 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5602 event[1] = sizeof(event) - 2; 5603 event[2] = enabled; 5604 hci_emit_event(event, sizeof(event), 1); 5605 } 5606 5607 // query if remote side supports eSCO 5608 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5609 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5610 if (!connection) return false; 5611 return (connection->remote_supported_features[0] & 1) != 0; 5612 } 5613 5614 static bool hci_ssp_supported(hci_connection_t * connection){ 5615 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5616 return (connection->bonding_flags & mask) == mask; 5617 } 5618 5619 // query if remote side supports SSP 5620 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5621 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5622 if (!connection) return false; 5623 return hci_ssp_supported(connection) ? 1 : 0; 5624 } 5625 5626 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5627 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5628 } 5629 5630 // GAP API 5631 /** 5632 * @bbrief enable/disable bonding. default is enabled 5633 * @praram enabled 5634 */ 5635 void gap_set_bondable_mode(int enable){ 5636 hci_stack->bondable = enable ? 1 : 0; 5637 } 5638 /** 5639 * @brief Get bondable mode. 5640 * @return 1 if bondable 5641 */ 5642 int gap_get_bondable_mode(void){ 5643 return hci_stack->bondable; 5644 } 5645 5646 /** 5647 * @brief map link keys to security levels 5648 */ 5649 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5650 switch (link_key_type){ 5651 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5652 return LEVEL_4; 5653 case COMBINATION_KEY: 5654 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5655 return LEVEL_3; 5656 default: 5657 return LEVEL_2; 5658 } 5659 } 5660 5661 /** 5662 * @brief map link keys to secure connection yes/no 5663 */ 5664 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5665 switch (link_key_type){ 5666 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5667 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5668 return 1; 5669 default: 5670 return 0; 5671 } 5672 } 5673 5674 /** 5675 * @brief map link keys to authenticated 5676 */ 5677 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5678 switch (link_key_type){ 5679 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5680 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5681 return 1; 5682 default: 5683 return 0; 5684 } 5685 } 5686 5687 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5688 log_info("gap_mitm_protection_required_for_security_level %u", level); 5689 return level > LEVEL_2; 5690 } 5691 5692 /** 5693 * @brief get current security level 5694 */ 5695 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5696 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5697 if (!connection) return LEVEL_0; 5698 return gap_security_level_for_connection(connection); 5699 } 5700 5701 /** 5702 * @brief request connection to device to 5703 * @result GAP_AUTHENTICATION_RESULT 5704 */ 5705 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5706 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5707 if (!connection){ 5708 hci_emit_security_level(con_handle, LEVEL_0); 5709 return; 5710 } 5711 5712 btstack_assert(hci_is_le_connection(connection) == false); 5713 5714 // 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) 5715 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5716 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5717 requested_level = LEVEL_4; 5718 } 5719 5720 gap_security_level_t current_level = gap_security_level(con_handle); 5721 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5722 requested_level, connection->requested_security_level, current_level); 5723 5724 // authentication active if authentication request was sent or planned level > 0 5725 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5726 if (authentication_active){ 5727 // authentication already active 5728 if (connection->requested_security_level < requested_level){ 5729 // increase requested level as new level is higher 5730 // TODO: handle re-authentication when done 5731 connection->requested_security_level = requested_level; 5732 } 5733 } else { 5734 // no request active, notify if security sufficient 5735 if (requested_level <= current_level){ 5736 hci_emit_security_level(con_handle, current_level); 5737 return; 5738 } 5739 5740 // store request 5741 connection->requested_security_level = requested_level; 5742 5743 // start to authenticate connection 5744 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5745 hci_run(); 5746 } 5747 } 5748 5749 /** 5750 * @brief start dedicated bonding with device. disconnect after bonding 5751 * @param device 5752 * @param request MITM protection 5753 * @result GAP_DEDICATED_BONDING_COMPLETE 5754 */ 5755 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5756 5757 // create connection state machine 5758 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5759 5760 if (!connection){ 5761 return BTSTACK_MEMORY_ALLOC_FAILED; 5762 } 5763 5764 // delete linkn key 5765 gap_drop_link_key_for_bd_addr(device); 5766 5767 // configure LEVEL_2/3, dedicated bonding 5768 connection->state = SEND_CREATE_CONNECTION; 5769 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5770 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5771 connection->bonding_flags = BONDING_DEDICATED; 5772 5773 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5774 5775 // handle: connnection failure (connection complete != ok) 5776 // handle: authentication failure 5777 // handle: disconnect on done 5778 5779 hci_run(); 5780 5781 return 0; 5782 } 5783 5784 void gap_set_local_name(const char * local_name){ 5785 hci_stack->local_name = local_name; 5786 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5787 // also update EIR if not set by user 5788 if (hci_stack->eir_data == NULL){ 5789 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5790 } 5791 hci_run(); 5792 } 5793 #endif 5794 5795 5796 #ifdef ENABLE_BLE 5797 5798 #ifdef ENABLE_LE_CENTRAL 5799 void gap_start_scan(void){ 5800 hci_stack->le_scanning_enabled = true; 5801 hci_run(); 5802 } 5803 5804 void gap_stop_scan(void){ 5805 hci_stack->le_scanning_enabled = false; 5806 hci_run(); 5807 } 5808 5809 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5810 hci_stack->le_scan_type = scan_type; 5811 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5812 hci_stack->le_scan_interval = scan_interval; 5813 hci_stack->le_scan_window = scan_window; 5814 hci_stack->le_scanning_param_update = true; 5815 hci_run(); 5816 } 5817 5818 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5819 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5820 } 5821 5822 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5823 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5824 if (!conn){ 5825 // disallow if le connection is already outgoing 5826 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5827 log_error("le connection already active"); 5828 return ERROR_CODE_COMMAND_DISALLOWED; 5829 } 5830 5831 log_info("gap_connect: no connection exists yet, creating context"); 5832 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5833 if (!conn){ 5834 // notify client that alloc failed 5835 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5836 log_info("gap_connect: failed to alloc hci_connection_t"); 5837 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5838 } 5839 5840 // set le connecting state 5841 if (hci_is_le_connection_type(addr_type)){ 5842 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5843 } 5844 5845 conn->state = SEND_CREATE_CONNECTION; 5846 log_info("gap_connect: send create connection next"); 5847 hci_run(); 5848 return ERROR_CODE_SUCCESS; 5849 } 5850 5851 if (!hci_is_le_connection(conn) || 5852 (conn->state == SEND_CREATE_CONNECTION) || 5853 (conn->state == SENT_CREATE_CONNECTION)) { 5854 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5855 log_error("gap_connect: classic connection or connect is already being created"); 5856 return GATT_CLIENT_IN_WRONG_STATE; 5857 } 5858 5859 // check if connection was just disconnected 5860 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5861 log_info("gap_connect: send create connection (again)"); 5862 conn->state = SEND_CREATE_CONNECTION; 5863 hci_run(); 5864 return ERROR_CODE_SUCCESS; 5865 } 5866 5867 log_info("gap_connect: context exists with state %u", conn->state); 5868 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5869 hci_run(); 5870 return ERROR_CODE_SUCCESS; 5871 } 5872 5873 // @assumption: only a single outgoing LE Connection exists 5874 static hci_connection_t * gap_get_outgoing_connection(void){ 5875 btstack_linked_item_t *it; 5876 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5877 hci_connection_t * conn = (hci_connection_t *) it; 5878 if (!hci_is_le_connection(conn)) continue; 5879 switch (conn->state){ 5880 case SEND_CREATE_CONNECTION: 5881 case SENT_CREATE_CONNECTION: 5882 case SENT_CANCEL_CONNECTION: 5883 return conn; 5884 default: 5885 break; 5886 }; 5887 } 5888 return NULL; 5889 } 5890 5891 uint8_t gap_connect_cancel(void){ 5892 hci_connection_t * conn = gap_get_outgoing_connection(); 5893 if (!conn) return 0; 5894 switch (conn->state){ 5895 case SEND_CREATE_CONNECTION: 5896 // skip sending create connection and emit event instead 5897 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5898 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5899 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5900 btstack_memory_hci_connection_free( conn ); 5901 break; 5902 case SENT_CREATE_CONNECTION: 5903 // request to send cancel connection 5904 conn->state = SEND_CANCEL_CONNECTION; 5905 hci_run(); 5906 break; 5907 default: 5908 break; 5909 } 5910 return 0; 5911 } 5912 #endif 5913 5914 #ifdef ENABLE_LE_CENTRAL 5915 /** 5916 * @brief Set connection parameters for outgoing connections 5917 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5918 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5919 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5920 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5921 * @param conn_latency, default: 4 5922 * @param supervision_timeout (unit: 10ms), default: 720 ms 5923 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5924 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5925 */ 5926 5927 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5928 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5929 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5930 hci_stack->le_connection_scan_interval = conn_scan_interval; 5931 hci_stack->le_connection_scan_window = conn_scan_window; 5932 hci_stack->le_connection_interval_min = conn_interval_min; 5933 hci_stack->le_connection_interval_max = conn_interval_max; 5934 hci_stack->le_connection_latency = conn_latency; 5935 hci_stack->le_supervision_timeout = supervision_timeout; 5936 hci_stack->le_minimum_ce_length = min_ce_length; 5937 hci_stack->le_maximum_ce_length = max_ce_length; 5938 } 5939 #endif 5940 5941 /** 5942 * @brief Updates the connection parameters for a given LE connection 5943 * @param handle 5944 * @param conn_interval_min (unit: 1.25ms) 5945 * @param conn_interval_max (unit: 1.25ms) 5946 * @param conn_latency 5947 * @param supervision_timeout (unit: 10ms) 5948 * @returns 0 if ok 5949 */ 5950 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5951 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5952 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5953 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5954 connection->le_conn_interval_min = conn_interval_min; 5955 connection->le_conn_interval_max = conn_interval_max; 5956 connection->le_conn_latency = conn_latency; 5957 connection->le_supervision_timeout = supervision_timeout; 5958 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5959 hci_run(); 5960 return 0; 5961 } 5962 5963 /** 5964 * @brief Request an update of the connection parameter for a given LE connection 5965 * @param handle 5966 * @param conn_interval_min (unit: 1.25ms) 5967 * @param conn_interval_max (unit: 1.25ms) 5968 * @param conn_latency 5969 * @param supervision_timeout (unit: 10ms) 5970 * @returns 0 if ok 5971 */ 5972 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5973 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5974 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5975 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5976 connection->le_conn_interval_min = conn_interval_min; 5977 connection->le_conn_interval_max = conn_interval_max; 5978 connection->le_conn_latency = conn_latency; 5979 connection->le_supervision_timeout = supervision_timeout; 5980 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5981 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5982 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5983 return 0; 5984 } 5985 5986 #ifdef ENABLE_LE_PERIPHERAL 5987 5988 /** 5989 * @brief Set Advertisement Data 5990 * @param advertising_data_length 5991 * @param advertising_data (max 31 octets) 5992 * @note data is not copied, pointer has to stay valid 5993 */ 5994 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5995 hci_stack->le_advertisements_data_len = advertising_data_length; 5996 hci_stack->le_advertisements_data = advertising_data; 5997 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5998 hci_run(); 5999 } 6000 6001 /** 6002 * @brief Set Scan Response Data 6003 * @param advertising_data_length 6004 * @param advertising_data (max 31 octets) 6005 * @note data is not copied, pointer has to stay valid 6006 */ 6007 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6008 hci_stack->le_scan_response_data_len = scan_response_data_length; 6009 hci_stack->le_scan_response_data = scan_response_data; 6010 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6011 hci_run(); 6012 } 6013 6014 /** 6015 * @brief Set Advertisement Parameters 6016 * @param adv_int_min 6017 * @param adv_int_max 6018 * @param adv_type 6019 * @param direct_address_type 6020 * @param direct_address 6021 * @param channel_map 6022 * @param filter_policy 6023 * 6024 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6025 */ 6026 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6027 uint8_t direct_address_typ, bd_addr_t direct_address, 6028 uint8_t channel_map, uint8_t filter_policy) { 6029 6030 hci_stack->le_advertisements_interval_min = adv_int_min; 6031 hci_stack->le_advertisements_interval_max = adv_int_max; 6032 hci_stack->le_advertisements_type = adv_type; 6033 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6034 hci_stack->le_advertisements_channel_map = channel_map; 6035 hci_stack->le_advertisements_filter_policy = filter_policy; 6036 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6037 6); 6038 6039 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6040 hci_run(); 6041 } 6042 6043 /** 6044 * @brief Enable/Disable Advertisements 6045 * @param enabled 6046 */ 6047 void gap_advertisements_enable(int enabled){ 6048 hci_stack->le_advertisements_enabled = enabled != 0; 6049 hci_update_advertisements_enabled_for_current_roles(); 6050 hci_run(); 6051 } 6052 6053 #endif 6054 6055 void hci_le_set_own_address_type(uint8_t own_address_type){ 6056 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6057 if (own_address_type == hci_stack->le_own_addr_type) return; 6058 hci_stack->le_own_addr_type = own_address_type; 6059 6060 #ifdef ENABLE_LE_PERIPHERAL 6061 // update advertisement parameters, too 6062 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6063 hci_run(); 6064 #endif 6065 #ifdef ENABLE_LE_CENTRAL 6066 // note: we don't update scan parameters or modify ongoing connection attempts 6067 #endif 6068 } 6069 6070 #endif 6071 6072 uint8_t gap_disconnect(hci_con_handle_t handle){ 6073 hci_connection_t * conn = hci_connection_for_handle(handle); 6074 if (!conn){ 6075 hci_emit_disconnection_complete(handle, 0); 6076 return 0; 6077 } 6078 // ignore if already disconnected 6079 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6080 return 0; 6081 } 6082 conn->state = SEND_DISCONNECT; 6083 hci_run(); 6084 return 0; 6085 } 6086 6087 int gap_read_rssi(hci_con_handle_t con_handle){ 6088 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6089 if (hci_connection == NULL) return 0; 6090 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6091 hci_run(); 6092 return 1; 6093 } 6094 6095 /** 6096 * @brief Get connection type 6097 * @param con_handle 6098 * @result connection_type 6099 */ 6100 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6101 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6102 if (!conn) return GAP_CONNECTION_INVALID; 6103 switch (conn->address_type){ 6104 case BD_ADDR_TYPE_LE_PUBLIC: 6105 case BD_ADDR_TYPE_LE_RANDOM: 6106 return GAP_CONNECTION_LE; 6107 case BD_ADDR_TYPE_SCO: 6108 return GAP_CONNECTION_SCO; 6109 case BD_ADDR_TYPE_ACL: 6110 return GAP_CONNECTION_ACL; 6111 default: 6112 return GAP_CONNECTION_INVALID; 6113 } 6114 } 6115 6116 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6117 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6118 if (!conn) return HCI_ROLE_INVALID; 6119 return (hci_role_t) conn->role; 6120 } 6121 6122 6123 #ifdef ENABLE_CLASSIC 6124 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6125 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6126 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6127 conn->request_role = role; 6128 hci_run(); 6129 return ERROR_CODE_SUCCESS; 6130 } 6131 #endif 6132 6133 #ifdef ENABLE_BLE 6134 6135 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){ 6136 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6137 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6138 6139 conn->le_phy_update_all_phys = all_phys; 6140 conn->le_phy_update_tx_phys = tx_phys; 6141 conn->le_phy_update_rx_phys = rx_phys; 6142 conn->le_phy_update_phy_options = phy_options; 6143 6144 hci_run(); 6145 6146 return 0; 6147 } 6148 6149 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6150 // check if already in list 6151 btstack_linked_list_iterator_t it; 6152 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6153 while (btstack_linked_list_iterator_has_next(&it)) { 6154 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6155 if (entry->address_type != address_type) { 6156 continue; 6157 } 6158 if (memcmp(entry->address, address, 6) != 0) { 6159 continue; 6160 } 6161 // disallow if already scheduled to add 6162 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6163 return ERROR_CODE_COMMAND_DISALLOWED; 6164 } 6165 // still on controller, but scheduled to remove -> re-add 6166 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6167 return ERROR_CODE_SUCCESS; 6168 } 6169 // alloc and add to list 6170 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6171 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6172 entry->address_type = address_type; 6173 (void)memcpy(entry->address, address, 6); 6174 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6175 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6176 return ERROR_CODE_SUCCESS; 6177 } 6178 6179 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6180 btstack_linked_list_iterator_t it; 6181 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6182 while (btstack_linked_list_iterator_has_next(&it)){ 6183 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6184 if (entry->address_type != address_type) { 6185 continue; 6186 } 6187 if (memcmp(entry->address, address, 6) != 0) { 6188 continue; 6189 } 6190 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6191 // remove from controller if already present 6192 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6193 } else { 6194 // directly remove entry from whitelist 6195 btstack_linked_list_iterator_remove(&it); 6196 btstack_memory_whitelist_entry_free(entry); 6197 } 6198 return ERROR_CODE_SUCCESS; 6199 } 6200 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6201 } 6202 6203 static void hci_whitelist_clear(void){ 6204 btstack_linked_list_iterator_t it; 6205 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6206 while (btstack_linked_list_iterator_has_next(&it)){ 6207 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6208 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6209 // remove from controller if already present 6210 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6211 continue; 6212 } 6213 // directly remove entry from whitelist 6214 btstack_linked_list_iterator_remove(&it); 6215 btstack_memory_whitelist_entry_free(entry); 6216 } 6217 } 6218 6219 /** 6220 * @brief Clear Whitelist 6221 * @returns 0 if ok 6222 */ 6223 uint8_t gap_whitelist_clear(void){ 6224 hci_whitelist_clear(); 6225 hci_run(); 6226 return ERROR_CODE_SUCCESS; 6227 } 6228 6229 /** 6230 * @brief Add Device to Whitelist 6231 * @param address_typ 6232 * @param address 6233 * @returns 0 if ok 6234 */ 6235 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6236 uint8_t status = hci_whitelist_add(address_type, address); 6237 if (status){ 6238 return status; 6239 } 6240 hci_run(); 6241 return ERROR_CODE_SUCCESS; 6242 } 6243 6244 /** 6245 * @brief Remove Device from Whitelist 6246 * @param address_typ 6247 * @param address 6248 * @returns 0 if ok 6249 */ 6250 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6251 uint8_t status = hci_whitelist_remove(address_type, address); 6252 if (status){ 6253 return status; 6254 } 6255 hci_run(); 6256 return ERROR_CODE_SUCCESS; 6257 } 6258 6259 #ifdef ENABLE_LE_CENTRAL 6260 /** 6261 * @brief Connect with Whitelist 6262 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6263 * @returns - if ok 6264 */ 6265 uint8_t gap_connect_with_whitelist(void){ 6266 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6267 return ERROR_CODE_COMMAND_DISALLOWED; 6268 } 6269 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6270 hci_run(); 6271 return ERROR_CODE_SUCCESS; 6272 } 6273 6274 /** 6275 * @brief Auto Connection Establishment - Start Connecting to device 6276 * @param address_typ 6277 * @param address 6278 * @returns 0 if ok 6279 */ 6280 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6281 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6282 return ERROR_CODE_COMMAND_DISALLOWED; 6283 } 6284 6285 uint8_t status = hci_whitelist_add(address_type, address); 6286 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6287 return status; 6288 } 6289 6290 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6291 6292 hci_run(); 6293 return ERROR_CODE_SUCCESS; 6294 } 6295 6296 /** 6297 * @brief Auto Connection Establishment - Stop Connecting to device 6298 * @param address_typ 6299 * @param address 6300 * @returns 0 if ok 6301 */ 6302 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6303 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6304 return ERROR_CODE_COMMAND_DISALLOWED; 6305 } 6306 6307 hci_whitelist_remove(address_type, address); 6308 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6309 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6310 } 6311 hci_run(); 6312 return 0; 6313 } 6314 6315 /** 6316 * @brief Auto Connection Establishment - Stop everything 6317 * @note Convenience function to stop all active auto connection attempts 6318 */ 6319 uint8_t gap_auto_connection_stop_all(void){ 6320 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6321 return ERROR_CODE_COMMAND_DISALLOWED; 6322 } 6323 hci_whitelist_clear(); 6324 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6325 hci_run(); 6326 return ERROR_CODE_SUCCESS; 6327 } 6328 6329 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6330 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6331 if (!conn) return 0; 6332 return conn->le_connection_interval; 6333 } 6334 #endif 6335 #endif 6336 6337 #ifdef ENABLE_CLASSIC 6338 /** 6339 * @brief Set Extended Inquiry Response data 6340 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6341 * @note has to be done before stack starts up 6342 */ 6343 void gap_set_extended_inquiry_response(const uint8_t * data){ 6344 hci_stack->eir_data = data; 6345 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6346 hci_run(); 6347 } 6348 6349 /** 6350 * @brief Start GAP Classic Inquiry 6351 * @param duration in 1.28s units 6352 * @return 0 if ok 6353 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6354 */ 6355 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6356 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6357 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6358 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6359 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6360 } 6361 hci_stack->inquiry_state = duration_in_1280ms_units; 6362 hci_run(); 6363 return 0; 6364 } 6365 6366 /** 6367 * @brief Stop GAP Classic Inquiry 6368 * @returns 0 if ok 6369 */ 6370 int gap_inquiry_stop(void){ 6371 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6372 // emit inquiry complete event, before it even started 6373 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6374 hci_emit_event(event, sizeof(event), 1); 6375 return 0; 6376 } 6377 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6378 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6379 hci_run(); 6380 return 0; 6381 } 6382 6383 void gap_inquiry_set_lap(uint32_t lap){ 6384 hci_stack->inquiry_lap = lap; 6385 } 6386 6387 6388 /** 6389 * @brief Remote Name Request 6390 * @param addr 6391 * @param page_scan_repetition_mode 6392 * @param clock_offset only used when bit 15 is set 6393 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6394 */ 6395 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6396 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6397 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6398 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6399 hci_stack->remote_name_clock_offset = clock_offset; 6400 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6401 hci_run(); 6402 return 0; 6403 } 6404 6405 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6406 hci_stack->gap_pairing_state = state; 6407 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6408 hci_run(); 6409 return 0; 6410 } 6411 6412 /** 6413 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6414 * @param addr 6415 * @param pin_data 6416 * @param pin_len 6417 * @return 0 if ok 6418 */ 6419 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6420 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6421 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6422 hci_stack->gap_pairing_pin_len = pin_len; 6423 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6424 } 6425 6426 /** 6427 * @brief Legacy Pairing Pin Code Response 6428 * @param addr 6429 * @param pin 6430 * @return 0 if ok 6431 */ 6432 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6433 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6434 } 6435 6436 /** 6437 * @brief Abort Legacy Pairing 6438 * @param addr 6439 * @param pin 6440 * @return 0 if ok 6441 */ 6442 int gap_pin_code_negative(bd_addr_t addr){ 6443 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6444 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6445 } 6446 6447 /** 6448 * @brief SSP Passkey Response 6449 * @param addr 6450 * @param passkey 6451 * @return 0 if ok 6452 */ 6453 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6454 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6455 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6456 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6457 } 6458 6459 /** 6460 * @brief Abort SSP Passkey Entry/Pairing 6461 * @param addr 6462 * @param pin 6463 * @return 0 if ok 6464 */ 6465 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6466 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6467 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6468 } 6469 6470 /** 6471 * @brief Accept SSP Numeric Comparison 6472 * @param addr 6473 * @param passkey 6474 * @return 0 if ok 6475 */ 6476 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6477 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6478 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6479 } 6480 6481 /** 6482 * @brief Abort SSP Numeric Comparison/Pairing 6483 * @param addr 6484 * @param pin 6485 * @return 0 if ok 6486 */ 6487 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6488 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6489 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6490 } 6491 6492 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6493 6494 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6495 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6496 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6497 connectionSetAuthenticationFlags(conn, flag); 6498 hci_run(); 6499 return ERROR_CODE_SUCCESS; 6500 } 6501 6502 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6503 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6504 } 6505 6506 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6507 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6508 } 6509 #endif 6510 6511 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6512 /** 6513 * @brief Report Remote OOB Data 6514 * @param bd_addr 6515 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6516 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6517 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6518 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6519 */ 6520 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){ 6521 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6522 if (connection == NULL) { 6523 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6524 } 6525 connection->classic_oob_c_192 = c_192; 6526 connection->classic_oob_r_192 = r_192; 6527 6528 // ignore P-256 if not supported by us 6529 if (hci_stack->secure_connections_active){ 6530 connection->classic_oob_c_256 = c_256; 6531 connection->classic_oob_r_256 = r_256; 6532 } 6533 6534 return ERROR_CODE_SUCCESS; 6535 } 6536 /** 6537 * @brief Generate new OOB data 6538 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6539 */ 6540 void gap_ssp_generate_oob_data(void){ 6541 hci_stack->classic_read_local_oob_data = true; 6542 hci_run(); 6543 } 6544 6545 #endif 6546 6547 /** 6548 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6549 * @param inquiry_mode see bluetooth_defines.h 6550 */ 6551 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6552 hci_stack->inquiry_mode = inquiry_mode; 6553 } 6554 6555 /** 6556 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6557 */ 6558 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6559 hci_stack->sco_voice_setting = voice_setting; 6560 } 6561 6562 /** 6563 * @brief Get SCO Voice Setting 6564 * @return current voice setting 6565 */ 6566 uint16_t hci_get_sco_voice_setting(void){ 6567 return hci_stack->sco_voice_setting; 6568 } 6569 6570 static int hci_have_usb_transport(void){ 6571 if (!hci_stack->hci_transport) return 0; 6572 const char * transport_name = hci_stack->hci_transport->name; 6573 if (!transport_name) return 0; 6574 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6575 } 6576 6577 /** @brief Get SCO packet length for current SCO Voice setting 6578 * @note Using SCO packets of the exact length is required for USB transfer 6579 * @return Length of SCO packets in bytes (not audio frames) 6580 */ 6581 uint16_t hci_get_sco_packet_length(void){ 6582 uint16_t sco_packet_length = 0; 6583 6584 #ifdef ENABLE_SCO_OVER_HCI 6585 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6586 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6587 6588 if (hci_have_usb_transport()){ 6589 // see Core Spec for H2 USB Transfer. 6590 // 3 byte SCO header + 24 bytes per connection 6591 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6592 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6593 } else { 6594 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6595 sco_packet_length = 3 + 60 * multiplier; 6596 // assert that it still fits inside an SCO buffer 6597 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6598 sco_packet_length = 3 + 60; 6599 } 6600 } 6601 #endif 6602 6603 #ifdef HAVE_SCO_TRANSPORT 6604 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6605 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6606 sco_packet_length = 3 + 60 * multiplier; 6607 #endif 6608 return sco_packet_length; 6609 } 6610 6611 /** 6612 * @brief Sets the master/slave policy 6613 * @param policy (0: attempt to become master, 1: let connecting device decide) 6614 */ 6615 void hci_set_master_slave_policy(uint8_t policy){ 6616 hci_stack->master_slave_policy = policy; 6617 } 6618 6619 #endif 6620 6621 HCI_STATE hci_get_state(void){ 6622 return hci_stack->state; 6623 } 6624 6625 #ifdef ENABLE_CLASSIC 6626 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6627 hci_stack->gap_classic_accept_callback = accept_callback; 6628 } 6629 #endif 6630 6631 /** 6632 * @brief Set callback for Bluetooth Hardware Error 6633 */ 6634 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6635 hci_stack->hardware_error_callback = fn; 6636 } 6637 6638 void hci_disconnect_all(void){ 6639 btstack_linked_list_iterator_t it; 6640 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6641 while (btstack_linked_list_iterator_has_next(&it)){ 6642 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6643 if (con->state == SENT_DISCONNECT) continue; 6644 con->state = SEND_DISCONNECT; 6645 } 6646 hci_run(); 6647 } 6648 6649 uint16_t hci_get_manufacturer(void){ 6650 return hci_stack->manufacturer; 6651 } 6652 6653 #ifdef ENABLE_BLE 6654 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6655 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6656 if (!hci_con) return NULL; 6657 return &hci_con->sm_connection; 6658 } 6659 6660 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6661 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6662 #endif 6663 6664 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6665 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6666 if (hci_connection == NULL) return 0; 6667 if (hci_is_le_connection(hci_connection)){ 6668 #ifdef ENABLE_BLE 6669 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6670 if (sm_conn->sm_connection_encrypted) { 6671 return sm_conn->sm_actual_encryption_key_size; 6672 } 6673 #endif 6674 } else { 6675 #ifdef ENABLE_CLASSIC 6676 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6677 return hci_connection->encryption_key_size; 6678 } 6679 #endif 6680 } 6681 return 0; 6682 } 6683 6684 int gap_authenticated(hci_con_handle_t con_handle){ 6685 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6686 if (hci_connection == NULL) return 0; 6687 6688 switch (hci_connection->address_type){ 6689 #ifdef ENABLE_BLE 6690 case BD_ADDR_TYPE_LE_PUBLIC: 6691 case BD_ADDR_TYPE_LE_RANDOM: 6692 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6693 return hci_connection->sm_connection.sm_connection_authenticated; 6694 #endif 6695 #ifdef ENABLE_CLASSIC 6696 case BD_ADDR_TYPE_SCO: 6697 case BD_ADDR_TYPE_ACL: 6698 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6699 #endif 6700 default: 6701 return 0; 6702 } 6703 } 6704 6705 int gap_secure_connection(hci_con_handle_t con_handle){ 6706 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6707 if (hci_connection == NULL) return 0; 6708 6709 switch (hci_connection->address_type){ 6710 #ifdef ENABLE_BLE 6711 case BD_ADDR_TYPE_LE_PUBLIC: 6712 case BD_ADDR_TYPE_LE_RANDOM: 6713 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6714 return hci_connection->sm_connection.sm_connection_sc; 6715 #endif 6716 #ifdef ENABLE_CLASSIC 6717 case BD_ADDR_TYPE_SCO: 6718 case BD_ADDR_TYPE_ACL: 6719 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6720 #endif 6721 default: 6722 return 0; 6723 } 6724 } 6725 6726 bool gap_bonded(hci_con_handle_t con_handle){ 6727 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6728 if (hci_connection == NULL) return 0; 6729 6730 #ifdef ENABLE_CLASSIC 6731 link_key_t link_key; 6732 link_key_type_t link_key_type; 6733 #endif 6734 switch (hci_connection->address_type){ 6735 #ifdef ENABLE_BLE 6736 case BD_ADDR_TYPE_LE_PUBLIC: 6737 case BD_ADDR_TYPE_LE_RANDOM: 6738 return hci_connection->sm_connection.sm_le_db_index >= 0; 6739 #endif 6740 #ifdef ENABLE_CLASSIC 6741 case BD_ADDR_TYPE_SCO: 6742 case BD_ADDR_TYPE_ACL: 6743 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6744 #endif 6745 default: 6746 return false; 6747 } 6748 } 6749 6750 #ifdef ENABLE_BLE 6751 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6752 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6753 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6754 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6755 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6756 return sm_conn->sm_connection_authorization_state; 6757 } 6758 #endif 6759 6760 #ifdef ENABLE_CLASSIC 6761 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){ 6762 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6763 if (!conn) return GAP_CONNECTION_INVALID; 6764 conn->sniff_min_interval = sniff_min_interval; 6765 conn->sniff_max_interval = sniff_max_interval; 6766 conn->sniff_attempt = sniff_attempt; 6767 conn->sniff_timeout = sniff_timeout; 6768 hci_run(); 6769 return 0; 6770 } 6771 6772 /** 6773 * @brief Exit Sniff mode 6774 * @param con_handle 6775 @ @return 0 if ok 6776 */ 6777 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6778 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6779 if (!conn) return GAP_CONNECTION_INVALID; 6780 conn->sniff_min_interval = 0xffff; 6781 hci_run(); 6782 return 0; 6783 } 6784 6785 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){ 6786 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6787 if (!conn) return GAP_CONNECTION_INVALID; 6788 conn->sniff_subrating_max_latency = max_latency; 6789 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6790 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6791 hci_run(); 6792 return ERROR_CODE_SUCCESS; 6793 } 6794 6795 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){ 6796 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6797 if (!conn) return GAP_CONNECTION_INVALID; 6798 conn->qos_service_type = service_type; 6799 conn->qos_token_rate = token_rate; 6800 conn->qos_peak_bandwidth = peak_bandwidth; 6801 conn->qos_latency = latency; 6802 conn->qos_delay_variation = delay_variation; 6803 hci_run(); 6804 return ERROR_CODE_SUCCESS; 6805 } 6806 6807 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6808 hci_stack->new_page_scan_interval = page_scan_interval; 6809 hci_stack->new_page_scan_window = page_scan_window; 6810 hci_run(); 6811 } 6812 6813 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6814 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6815 hci_run(); 6816 } 6817 6818 #endif 6819 6820 void hci_halting_defer(void){ 6821 if (hci_stack->state != HCI_STATE_HALTING) return; 6822 switch (hci_stack->substate){ 6823 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6824 case HCI_HALTING_CLOSE: 6825 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6826 break; 6827 default: 6828 break; 6829 } 6830 } 6831 6832 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6833 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6834 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6835 if (le_device_db_index >= le_device_db_max_count()) return; 6836 uint8_t offset = le_device_db_index >> 3; 6837 uint8_t mask = 1 << (le_device_db_index & 7); 6838 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6839 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6840 // note: go back to remove entries, otherwise, a remove + add will skip the add 6841 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6842 } 6843 } 6844 6845 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6846 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6847 if (le_device_db_index >= le_device_db_max_count()) return; 6848 uint8_t offset = le_device_db_index >> 3; 6849 uint8_t mask = 1 << (le_device_db_index & 7); 6850 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6851 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6852 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6853 } 6854 } 6855 6856 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6857 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6858 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6859 } 6860 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6861 // restart le resolving list update 6862 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6863 } 6864 return ERROR_CODE_SUCCESS; 6865 } 6866 #endif 6867 6868 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6869 void hci_setup_test_connections_fuzz(void){ 6870 hci_connection_t * conn; 6871 6872 // default address: 66:55:44:33:00:01 6873 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6874 6875 // setup Controller info 6876 hci_stack->num_cmd_packets = 255; 6877 hci_stack->acl_packets_total_num = 255; 6878 6879 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6880 addr[5] = 0x01; 6881 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6882 conn->con_handle = addr[5]; 6883 conn->role = HCI_ROLE_SLAVE; 6884 conn->state = RECEIVED_CONNECTION_REQUEST; 6885 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6886 6887 // setup incoming Classic SCO connection with con handle 0x0002 6888 addr[5] = 0x02; 6889 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6890 conn->con_handle = addr[5]; 6891 conn->role = HCI_ROLE_SLAVE; 6892 conn->state = RECEIVED_CONNECTION_REQUEST; 6893 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6894 6895 // setup ready Classic ACL connection with con handle 0x0003 6896 addr[5] = 0x03; 6897 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6898 conn->con_handle = addr[5]; 6899 conn->role = HCI_ROLE_SLAVE; 6900 conn->state = OPEN; 6901 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6902 6903 // setup ready Classic SCO connection with con handle 0x0004 6904 addr[5] = 0x04; 6905 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6906 conn->con_handle = addr[5]; 6907 conn->role = HCI_ROLE_SLAVE; 6908 conn->state = OPEN; 6909 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6910 6911 // setup ready LE ACL connection with con handle 0x005 and public address 6912 addr[5] = 0x05; 6913 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6914 conn->con_handle = addr[5]; 6915 conn->role = HCI_ROLE_SLAVE; 6916 conn->state = OPEN; 6917 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6918 conn->sm_connection.sm_connection_encrypted = 1; 6919 } 6920 6921 void hci_free_connections_fuzz(void){ 6922 btstack_linked_list_iterator_t it; 6923 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6924 while (btstack_linked_list_iterator_has_next(&it)){ 6925 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6926 btstack_linked_list_iterator_remove(&it); 6927 btstack_memory_hci_connection_free(con); 6928 } 6929 } 6930 void hci_simulate_working_fuzz(void){ 6931 hci_init_done(); 6932 hci_stack->num_cmd_packets = 255; 6933 } 6934 #endif 6935