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 int 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 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return 0; 443 return (int) 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 int hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return 0; 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 1; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static int 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 0; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 int hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return 0; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 int 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 0; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return 0; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 int hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return 0; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 int hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 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 int hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return 0; 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 int 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 int 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 0; 701 } 702 hci_stack->hci_packet_buffer_reserved = 1; 703 return 1; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = 0; 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 int 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 int err; 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 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 781 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 782 783 // done yet? 784 if (!more_fragments) break; 785 786 // can send more? 787 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 788 } 789 790 log_debug("hci_send_acl_packet_fragments loop over"); 791 792 // release buffer now for synchronous transport 793 if (hci_transport_synchronous()){ 794 hci_stack->acl_fragmentation_tx_active = 0; 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 } 798 799 return err; 800 } 801 802 // pre: caller has reserved the packet buffer 803 int hci_send_acl_packet_buffer(int size){ 804 805 // log_info("hci_send_acl_packet_buffer size %u", size); 806 807 if (!hci_stack->hci_packet_buffer_reserved) { 808 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 809 return 0; 810 } 811 812 uint8_t * packet = hci_stack->hci_packet_buffer; 813 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 814 815 // check for free places on Bluetooth module 816 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 817 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 return BTSTACK_ACL_BUFFERS_FULL; 821 } 822 823 hci_connection_t *connection = hci_connection_for_handle( con_handle); 824 if (!connection) { 825 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return 0; 829 } 830 831 #ifdef ENABLE_CLASSIC 832 hci_connection_timestamp(connection); 833 #endif 834 835 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 836 837 // setup data 838 hci_stack->acl_fragmentation_total_size = size; 839 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 840 841 return hci_send_acl_packet_fragments(connection); 842 } 843 844 #ifdef ENABLE_CLASSIC 845 // pre: caller has reserved the packet buffer 846 int hci_send_sco_packet_buffer(int size){ 847 848 // log_info("hci_send_acl_packet_buffer size %u", size); 849 850 if (!hci_stack->hci_packet_buffer_reserved) { 851 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 852 return 0; 853 } 854 855 uint8_t * packet = hci_stack->hci_packet_buffer; 856 857 // skip checks in loopback mode 858 if (!hci_stack->loopback_mode){ 859 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 860 861 // check for free places on Bluetooth module 862 if (!hci_can_send_prepared_sco_packet_now()) { 863 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 864 hci_release_packet_buffer(); 865 hci_emit_transport_packet_sent(); 866 return BTSTACK_ACL_BUFFERS_FULL; 867 } 868 869 // track send packet in connection struct 870 hci_connection_t *connection = hci_connection_for_handle( con_handle); 871 if (!connection) { 872 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 873 hci_release_packet_buffer(); 874 hci_emit_transport_packet_sent(); 875 return 0; 876 } 877 878 if (hci_have_usb_transport()){ 879 // token used 880 hci_stack->sco_can_send_now = 0; 881 } else { 882 if (hci_stack->synchronous_flow_control_enabled){ 883 connection->num_packets_sent++; 884 } else { 885 connection->sco_tx_ready--; 886 } 887 } 888 } 889 890 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 891 892 #ifdef HAVE_SCO_TRANSPORT 893 hci_stack->sco_transport->send_packet(packet, size); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 897 return 0; 898 #else 899 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 900 if (hci_transport_synchronous()){ 901 hci_release_packet_buffer(); 902 hci_emit_transport_packet_sent(); 903 } 904 905 return err; 906 #endif 907 } 908 #endif 909 910 static void acl_handler(uint8_t *packet, uint16_t size){ 911 912 // get info 913 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 914 hci_connection_t *conn = hci_connection_for_handle(con_handle); 915 uint8_t acl_flags = READ_ACL_FLAGS(packet); 916 uint16_t acl_length = READ_ACL_LENGTH(packet); 917 918 // ignore non-registered handle 919 if (!conn){ 920 log_error("acl_handler called with non-registered handle %u!" , con_handle); 921 return; 922 } 923 924 // assert packet is complete 925 if ((acl_length + 4u) != size){ 926 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 927 return; 928 } 929 930 #ifdef ENABLE_CLASSIC 931 // update idle timestamp 932 hci_connection_timestamp(conn); 933 #endif 934 935 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 936 hci_stack->host_completed_packets = 1; 937 conn->num_packets_completed++; 938 #endif 939 940 // handle different packet types 941 switch (acl_flags & 0x03u) { 942 943 case 0x01: // continuation fragment 944 945 // sanity checks 946 if (conn->acl_recombination_pos == 0u) { 947 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 948 return; 949 } 950 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 951 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 952 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 953 conn->acl_recombination_pos = 0; 954 return; 955 } 956 957 // append fragment payload (header already stored) 958 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 959 &packet[4], acl_length); 960 conn->acl_recombination_pos += acl_length; 961 962 // forward complete L2CAP packet if complete. 963 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 964 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 965 // reset recombination buffer 966 conn->acl_recombination_length = 0; 967 conn->acl_recombination_pos = 0; 968 } 969 break; 970 971 case 0x02: { // first fragment 972 973 // sanity check 974 if (conn->acl_recombination_pos) { 975 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 976 conn->acl_recombination_pos = 0; 977 } 978 979 // peek into L2CAP packet! 980 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 981 982 // compare fragment size to L2CAP packet size 983 if (acl_length >= (l2cap_length + 4u)){ 984 // forward fragment as L2CAP packet 985 hci_emit_acl_packet(packet, acl_length + 4u); 986 } else { 987 988 if (acl_length > HCI_ACL_BUFFER_SIZE){ 989 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 990 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 991 return; 992 } 993 994 // store first fragment and tweak acl length for complete package 995 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 996 packet, acl_length + 4u); 997 conn->acl_recombination_pos = acl_length + 4u; 998 conn->acl_recombination_length = l2cap_length; 999 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1000 } 1001 break; 1002 1003 } 1004 default: 1005 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1006 return; 1007 } 1008 1009 // execute main loop 1010 hci_run(); 1011 } 1012 1013 static void hci_shutdown_connection(hci_connection_t *conn){ 1014 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1015 1016 #ifdef ENABLE_CLASSIC 1017 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1018 bd_addr_type_t addr_type = conn->address_type; 1019 #endif 1020 #ifdef HAVE_SCO_TRANSPORT 1021 hci_con_handle_t con_handle = conn->con_handle; 1022 #endif 1023 #endif 1024 1025 btstack_run_loop_remove_timer(&conn->timeout); 1026 1027 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1028 btstack_memory_hci_connection_free( conn ); 1029 1030 // now it's gone 1031 hci_emit_nr_connections_changed(); 1032 1033 #ifdef ENABLE_CLASSIC 1034 #ifdef ENABLE_SCO_OVER_HCI 1035 // update SCO 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1037 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1038 } 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1042 hci_stack->sco_transport->close(con_handle); 1043 } 1044 #endif 1045 #endif 1046 } 1047 1048 #ifdef ENABLE_CLASSIC 1049 1050 static const uint16_t packet_type_sizes[] = { 1051 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1052 HCI_ACL_DH1_SIZE, 0, 0, 0, 1053 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1054 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1055 }; 1056 static const uint8_t packet_type_feature_requirement_bit[] = { 1057 0, // 3 slot packets 1058 1, // 5 slot packets 1059 25, // EDR 2 mpbs 1060 26, // EDR 3 mbps 1061 39, // 3 slot EDR packts 1062 40, // 5 slot EDR packet 1063 }; 1064 static const uint16_t packet_type_feature_packet_mask[] = { 1065 0x0f00, // 3 slot packets 1066 0xf000, // 5 slot packets 1067 0x1102, // EDR 2 mpbs 1068 0x2204, // EDR 3 mbps 1069 0x0300, // 3 slot EDR packts 1070 0x3000, // 5 slot EDR packet 1071 }; 1072 1073 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1074 // enable packet types based on size 1075 uint16_t packet_types = 0; 1076 unsigned int i; 1077 for (i=0;i<16;i++){ 1078 if (packet_type_sizes[i] == 0) continue; 1079 if (packet_type_sizes[i] <= buffer_size){ 1080 packet_types |= 1 << i; 1081 } 1082 } 1083 // disable packet types due to missing local supported features 1084 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1085 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1086 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1087 if (feature_set) continue; 1088 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1089 packet_types &= ~packet_type_feature_packet_mask[i]; 1090 } 1091 // flip bits for "may not be used" 1092 packet_types ^= 0x3306; 1093 return packet_types; 1094 } 1095 1096 uint16_t hci_usable_acl_packet_types(void){ 1097 return hci_stack->packet_types; 1098 } 1099 #endif 1100 1101 uint8_t* hci_get_outgoing_packet_buffer(void){ 1102 // hci packet buffer is >= acl data packet length 1103 return hci_stack->hci_packet_buffer; 1104 } 1105 1106 uint16_t hci_max_acl_data_packet_length(void){ 1107 return hci_stack->acl_data_packet_length; 1108 } 1109 1110 #ifdef ENABLE_CLASSIC 1111 int hci_extended_sco_link_supported(void){ 1112 // No. 31, byte 3, bit 7 1113 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1114 } 1115 #endif 1116 1117 int hci_non_flushable_packet_boundary_flag_supported(void){ 1118 // No. 54, byte 6, bit 6 1119 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1120 } 1121 1122 static int gap_ssp_supported(void){ 1123 // No. 51, byte 6, bit 3 1124 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1125 } 1126 1127 static int hci_classic_supported(void){ 1128 #ifdef ENABLE_CLASSIC 1129 // No. 37, byte 4, bit 5, = No BR/EDR Support 1130 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1131 #else 1132 return 0; 1133 #endif 1134 } 1135 1136 static int hci_le_supported(void){ 1137 #ifdef ENABLE_BLE 1138 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1139 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1140 #else 1141 return 0; 1142 #endif 1143 } 1144 1145 #ifdef ENABLE_BLE 1146 1147 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1148 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1149 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1150 } else { 1151 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1152 } 1153 } 1154 1155 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1156 *addr_type = hci_stack->le_own_addr_type; 1157 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1158 } 1159 1160 #ifdef ENABLE_LE_PERIPHERAL 1161 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1162 *addr_type = hci_stack->le_advertisements_own_addr_type; 1163 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1164 }; 1165 #endif 1166 1167 #ifdef ENABLE_LE_CENTRAL 1168 1169 /** 1170 * @brief Get own addr type and address used for LE connections (Central) 1171 */ 1172 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1173 *addr_type = hci_stack->le_connection_own_addr_type; 1174 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1175 } 1176 1177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1178 1179 int offset = 3; 1180 int num_reports = packet[offset]; 1181 offset += 1; 1182 1183 int i; 1184 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1185 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1186 for (i=0; (i<num_reports) && (offset < size);i++){ 1187 // sanity checks on data_length: 1188 uint8_t data_length = packet[offset + 8]; 1189 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1190 if ((offset + 9u + data_length + 1u) > size) return; 1191 // setup event 1192 uint8_t event_size = 10u + data_length; 1193 int pos = 0; 1194 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1195 event[pos++] = event_size; 1196 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1197 offset += 8; 1198 pos += 8; 1199 event[pos++] = packet[offset + 1 + data_length]; // rssi 1200 event[pos++] = data_length; 1201 offset++; 1202 (void)memcpy(&event[pos], &packet[offset], data_length); 1203 pos += data_length; 1204 offset += data_length + 1u; // rssi 1205 hci_emit_event(event, pos, 1); 1206 } 1207 } 1208 #endif 1209 #endif 1210 1211 #ifdef ENABLE_BLE 1212 #ifdef ENABLE_LE_PERIPHERAL 1213 static void hci_update_advertisements_enabled_for_current_roles(void){ 1214 if (hci_stack->le_advertisements_enabled){ 1215 // get number of active le slave connections 1216 int num_slave_connections = 0; 1217 btstack_linked_list_iterator_t it; 1218 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1219 while (btstack_linked_list_iterator_has_next(&it)){ 1220 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1221 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1222 if (con->state != OPEN) continue; 1223 if (con->role != HCI_ROLE_SLAVE) continue; 1224 if (!hci_is_le_connection(con)) continue; 1225 num_slave_connections++; 1226 } 1227 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1228 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1229 } else { 1230 hci_stack->le_advertisements_enabled_for_current_roles = false; 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1237 1238 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1239 if (!hci_stack->config) return 0; 1240 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1241 // Limit baud rate for Broadcom chipsets to 3 mbps 1242 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1243 baud_rate = 3000000; 1244 } 1245 return baud_rate; 1246 } 1247 1248 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1249 UNUSED(ds); 1250 1251 switch (hci_stack->substate){ 1252 case HCI_INIT_W4_SEND_RESET: 1253 log_info("Resend HCI Reset"); 1254 hci_stack->substate = HCI_INIT_SEND_RESET; 1255 hci_stack->num_cmd_packets = 1; 1256 hci_run(); 1257 break; 1258 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1259 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1260 if (hci_stack->hci_transport->reset_link){ 1261 hci_stack->hci_transport->reset_link(); 1262 } 1263 1264 /* fall through */ 1265 1266 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1267 log_info("Resend HCI Reset - CSR Warm Boot"); 1268 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1269 hci_stack->num_cmd_packets = 1; 1270 hci_run(); 1271 break; 1272 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1273 if (hci_stack->hci_transport->set_baudrate){ 1274 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1275 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1276 hci_stack->hci_transport->set_baudrate(baud_rate); 1277 } 1278 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1279 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1280 if (hci_stack->hci_transport->reset_link){ 1281 log_info("Link Reset"); 1282 hci_stack->hci_transport->reset_link(); 1283 } 1284 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1285 hci_run(); 1286 } 1287 break; 1288 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1289 // otherwise continue 1290 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1291 hci_send_cmd(&hci_read_local_supported_commands); 1292 break; 1293 default: 1294 break; 1295 } 1296 } 1297 #endif 1298 1299 static void hci_initializing_next_state(void){ 1300 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1301 } 1302 1303 // assumption: hci_can_send_command_packet_now() == true 1304 static void hci_initializing_run(void){ 1305 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1306 switch (hci_stack->substate){ 1307 case HCI_INIT_SEND_RESET: 1308 hci_state_reset(); 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 // prepare reset if command complete not received in 100ms 1312 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1313 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1314 btstack_run_loop_add_timer(&hci_stack->timeout); 1315 #endif 1316 // send command 1317 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1318 hci_send_cmd(&hci_reset); 1319 break; 1320 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1321 hci_send_cmd(&hci_read_local_version_information); 1322 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1323 break; 1324 case HCI_INIT_SEND_READ_LOCAL_NAME: 1325 hci_send_cmd(&hci_read_local_name); 1326 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1327 break; 1328 1329 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1330 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1331 hci_state_reset(); 1332 // prepare reset if command complete not received in 100ms 1333 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 // send command 1337 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1338 hci_send_cmd(&hci_reset); 1339 break; 1340 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1341 hci_state_reset(); 1342 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1343 hci_send_cmd(&hci_reset); 1344 break; 1345 case HCI_INIT_SEND_BAUD_CHANGE: { 1346 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1347 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1351 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1352 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1354 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1355 btstack_run_loop_add_timer(&hci_stack->timeout); 1356 } 1357 break; 1358 } 1359 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1360 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1361 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1362 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1363 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1364 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1365 break; 1366 } 1367 case HCI_INIT_CUSTOM_INIT: 1368 // Custom initialization 1369 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1370 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1371 bool send_cmd = false; 1372 switch (hci_stack->chipset_result){ 1373 case BTSTACK_CHIPSET_VALID_COMMAND: 1374 send_cmd = true; 1375 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1376 break; 1377 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1378 send_cmd = true; 1379 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1380 log_info("CSR Warm Boot"); 1381 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1382 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1383 btstack_run_loop_add_timer(&hci_stack->timeout); 1384 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1385 && hci_stack->config 1386 && hci_stack->chipset 1387 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1388 && hci_stack->hci_transport->set_baudrate 1389 && hci_transport_uart_get_main_baud_rate()){ 1390 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1391 } else { 1392 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1393 } 1394 break; 1395 default: 1396 break; 1397 } 1398 1399 if (send_cmd){ 1400 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1401 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1402 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1403 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1404 break; 1405 } 1406 log_info("Init script done"); 1407 1408 // Init script download on Broadcom chipsets causes: 1409 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1410 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1411 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1412 1413 // - baud rate to reset, restore UART baud rate if needed 1414 int need_baud_change = hci_stack->config 1415 && hci_stack->chipset 1416 && hci_stack->chipset->set_baudrate_command 1417 && hci_stack->hci_transport->set_baudrate 1418 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1419 if (need_baud_change) { 1420 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1421 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1422 hci_stack->hci_transport->set_baudrate(baud_rate); 1423 } 1424 1425 uint16_t bcm_delay_ms = 300; 1426 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1427 // -> Work around: wait here. 1428 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1429 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1430 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1431 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1432 btstack_run_loop_add_timer(&hci_stack->timeout); 1433 break; 1434 } 1435 } 1436 // otherwise continue 1437 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1438 hci_send_cmd(&hci_read_local_supported_commands); 1439 break; 1440 case HCI_INIT_SET_BD_ADDR: 1441 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1442 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1443 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1444 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1445 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1446 break; 1447 #endif 1448 1449 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1450 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1451 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1452 hci_send_cmd(&hci_read_local_supported_commands); 1453 break; 1454 case HCI_INIT_READ_BD_ADDR: 1455 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1456 hci_send_cmd(&hci_read_bd_addr); 1457 break; 1458 case HCI_INIT_READ_BUFFER_SIZE: 1459 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1460 hci_send_cmd(&hci_read_buffer_size); 1461 break; 1462 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1463 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1464 hci_send_cmd(&hci_read_local_supported_features); 1465 break; 1466 1467 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1468 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1469 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1470 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1471 break; 1472 case HCI_INIT_HOST_BUFFER_SIZE: 1473 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1474 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1475 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1476 break; 1477 #endif 1478 1479 case HCI_INIT_SET_EVENT_MASK: 1480 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1481 if (hci_le_supported()){ 1482 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1483 } else { 1484 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1485 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1486 } 1487 break; 1488 1489 #ifdef ENABLE_CLASSIC 1490 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1492 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1493 break; 1494 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1495 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1496 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1497 break; 1498 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1499 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1500 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1501 break; 1502 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1503 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1504 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1505 break; 1506 case HCI_INIT_WRITE_LOCAL_NAME: { 1507 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1508 hci_reserve_packet_buffer(); 1509 uint8_t * packet = hci_stack->hci_packet_buffer; 1510 // construct HCI Command and send 1511 uint16_t opcode = hci_write_local_name.opcode; 1512 hci_stack->last_cmd_opcode = opcode; 1513 packet[0] = opcode & 0xff; 1514 packet[1] = opcode >> 8; 1515 packet[2] = DEVICE_NAME_LEN; 1516 memset(&packet[3], 0, DEVICE_NAME_LEN); 1517 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1518 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1519 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1520 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1521 // expand '00:00:00:00:00:00' in name with bd_addr 1522 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1523 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1524 break; 1525 } 1526 case HCI_INIT_WRITE_EIR_DATA: { 1527 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1528 hci_reserve_packet_buffer(); 1529 uint8_t * packet = hci_stack->hci_packet_buffer; 1530 // construct HCI Command in-place and send 1531 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1532 hci_stack->last_cmd_opcode = opcode; 1533 uint16_t offset = 0; 1534 packet[offset++] = opcode & 0xff; 1535 packet[offset++] = opcode >> 8; 1536 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1537 packet[offset++] = 0; // FEC not required 1538 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1539 if (hci_stack->eir_data){ 1540 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1541 ad_context_t context; 1542 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1543 uint8_t data_type = ad_iterator_get_data_type(&context); 1544 uint8_t size = ad_iterator_get_data_len(&context); 1545 const uint8_t *data = ad_iterator_get_data(&context); 1546 // copy item 1547 packet[offset++] = size + 1; 1548 packet[offset++] = data_type; 1549 memcpy(&packet[offset], data, size); 1550 // update name item 1551 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1552 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1553 } 1554 offset += size; 1555 } 1556 } else { 1557 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1558 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1559 packet[offset++] = bytes_to_copy + 1; 1560 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1561 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1562 // expand '00:00:00:00:00:00' in name with bd_addr 1563 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1564 } 1565 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1566 break; 1567 } 1568 case HCI_INIT_WRITE_INQUIRY_MODE: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1570 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1571 break; 1572 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1573 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1574 hci_stack->secure_connections_active = true; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1576 break; 1577 case HCI_INIT_WRITE_SCAN_ENABLE: 1578 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1580 break; 1581 // only sent if ENABLE_SCO_OVER_HCI is defined 1582 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1584 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1585 break; 1586 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1588 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1589 break; 1590 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1591 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1592 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1593 #ifdef ENABLE_SCO_OVER_HCI 1594 log_info("BCM: Route SCO data via HCI transport"); 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1596 #endif 1597 #ifdef ENABLE_SCO_OVER_PCM 1598 log_info("BCM: Route SCO data via PCM interface"); 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_sco_pcm_int, 0, 2, 0, 1, 1); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1605 #endif 1606 #endif 1607 break; 1608 #ifdef ENABLE_SCO_OVER_PCM 1609 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1610 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1611 log_info("BCM: Config PCM interface for I2S"); 1612 #ifdef ENABLE_BCM_PCM_WBS 1613 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1614 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1615 #else 1616 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1617 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1618 #endif 1619 break; 1620 #endif 1621 #endif 1622 1623 #ifdef ENABLE_BLE 1624 // LE INIT 1625 case HCI_INIT_LE_READ_BUFFER_SIZE: 1626 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1627 hci_send_cmd(&hci_le_read_buffer_size); 1628 break; 1629 case HCI_INIT_LE_SET_EVENT_MASK: 1630 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1631 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1632 break; 1633 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1634 // LE Supported Host = 1, Simultaneous Host = 0 1635 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1636 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1637 break; 1638 #endif 1639 1640 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1641 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1642 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1643 hci_send_cmd(&hci_le_read_maximum_data_length); 1644 break; 1645 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1648 break; 1649 #endif 1650 1651 #ifdef ENABLE_LE_CENTRAL 1652 case HCI_INIT_READ_WHITE_LIST_SIZE: 1653 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1654 hci_send_cmd(&hci_le_read_white_list_size); 1655 break; 1656 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1657 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1658 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); 1659 break; 1660 #endif 1661 default: 1662 return; 1663 } 1664 } 1665 1666 static void hci_init_done(void){ 1667 // done. tell the app 1668 log_info("hci_init_done -> HCI_STATE_WORKING"); 1669 hci_stack->state = HCI_STATE_WORKING; 1670 hci_emit_state(); 1671 hci_run(); 1672 } 1673 1674 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1675 bool command_completed = false; 1676 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1677 uint16_t opcode = little_endian_read_16(packet,3); 1678 if (opcode == hci_stack->last_cmd_opcode){ 1679 command_completed = true; 1680 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1681 } else { 1682 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1683 } 1684 } 1685 1686 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1687 uint8_t status = packet[2]; 1688 uint16_t opcode = little_endian_read_16(packet,4); 1689 if (opcode == hci_stack->last_cmd_opcode){ 1690 if (status){ 1691 command_completed = true; 1692 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1693 } else { 1694 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1695 } 1696 } else { 1697 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1698 } 1699 } 1700 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1701 // Vendor == CSR 1702 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 } 1706 1707 // Vendor == Toshiba 1708 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1709 // TODO: track actual command 1710 command_completed = true; 1711 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1712 hci_stack->num_cmd_packets = 1; 1713 } 1714 #endif 1715 1716 return command_completed; 1717 } 1718 1719 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1720 1721 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1722 1723 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1724 1725 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1726 1727 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1728 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1729 // 1730 // HCI Reset 1731 // Timeout 100 ms 1732 // HCI Reset 1733 // Command Complete Reset 1734 // HCI Read Local Version Information 1735 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1736 // hang... 1737 // 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_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1746 return; 1747 } 1748 } 1749 1750 // CSR & H5 1751 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1752 if (!command_completed 1753 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1754 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1755 1756 uint16_t opcode = little_endian_read_16(packet,3); 1757 if (opcode == hci_reset.opcode){ 1758 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1759 return; 1760 } 1761 } 1762 1763 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1764 // fix: Correct substate and behave as command below 1765 if (command_completed){ 1766 switch (hci_stack->substate){ 1767 case HCI_INIT_SEND_RESET: 1768 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1769 break; 1770 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1772 break; 1773 default: 1774 break; 1775 } 1776 } 1777 1778 #endif 1779 1780 if (!command_completed) return; 1781 1782 bool need_baud_change = false; 1783 bool need_addr_change = false; 1784 1785 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1786 need_baud_change = hci_stack->config 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_baudrate_command 1789 && hci_stack->hci_transport->set_baudrate 1790 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1791 1792 need_addr_change = hci_stack->custom_bd_addr_set 1793 && hci_stack->chipset 1794 && hci_stack->chipset->set_bd_addr_command; 1795 #endif 1796 1797 switch(hci_stack->substate){ 1798 1799 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1800 case HCI_INIT_SEND_RESET: 1801 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1802 // fix: just correct substate and behave as command below 1803 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1804 btstack_run_loop_remove_timer(&hci_stack->timeout); 1805 break; 1806 case HCI_INIT_W4_SEND_RESET: 1807 btstack_run_loop_remove_timer(&hci_stack->timeout); 1808 break; 1809 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1810 log_info("Received local name, need baud change %d", (int) need_baud_change); 1811 if (need_baud_change){ 1812 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1813 return; 1814 } 1815 // skip baud change 1816 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1817 return; 1818 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1819 // for STLC2500D, baud rate change already happened. 1820 // for others, baud rate gets changed now 1821 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1822 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1823 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1824 hci_stack->hci_transport->set_baudrate(baud_rate); 1825 } 1826 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1827 return; 1828 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1829 btstack_run_loop_remove_timer(&hci_stack->timeout); 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT: 1833 // repeat custom init 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 #else 1837 case HCI_INIT_W4_SEND_RESET: 1838 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1839 return ; 1840 #endif 1841 1842 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1843 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1844 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1845 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1846 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1847 return; 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 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1856 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1857 if (need_baud_change){ 1858 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1859 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1860 hci_stack->hci_transport->set_baudrate(baud_rate); 1861 } 1862 if (need_addr_change){ 1863 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1864 return; 1865 } 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 case HCI_INIT_W4_SET_BD_ADDR: 1869 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1870 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1871 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1872 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1873 return; 1874 } 1875 // skipping st warm boot 1876 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1877 return; 1878 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1879 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1880 return; 1881 #endif 1882 case HCI_INIT_W4_READ_BD_ADDR: 1883 // only read buffer size if supported 1884 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1885 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1886 return; 1887 } 1888 // skipping read buffer size 1889 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1890 return; 1891 case HCI_INIT_W4_SET_EVENT_MASK: 1892 // skip Classic init commands for LE only chipsets 1893 if (!hci_classic_supported()){ 1894 #ifdef ENABLE_BLE 1895 if (hci_le_supported()){ 1896 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1897 return; 1898 } 1899 #endif 1900 log_error("Neither BR/EDR nor LE supported"); 1901 hci_init_done(); 1902 return; 1903 } 1904 if (!gap_ssp_supported()){ 1905 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1906 return; 1907 } 1908 break; 1909 #ifdef ENABLE_BLE 1910 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1911 // skip write le host if not supported (e.g. on LE only EM9301) 1912 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1913 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1914 return; 1915 1916 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1917 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1918 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1919 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1920 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1921 return; 1922 } 1923 // explicit fall through to reduce repetitions 1924 1925 #ifdef ENABLE_LE_CENTRAL 1926 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1927 #else 1928 hci_init_done(); 1929 #endif 1930 return; 1931 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1932 1933 #endif /* ENABLE_BLE */ 1934 1935 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1936 // skip write secure connections host support if not supported or disabled 1937 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1938 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1939 return; 1940 } 1941 break; 1942 1943 #ifdef ENABLE_SCO_OVER_HCI 1944 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1945 // skip write synchronous flow control if not supported 1946 if (hci_stack->local_supported_commands[0] & 0x04) break; 1947 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1948 1949 /* fall through */ 1950 1951 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1952 // skip write default erroneous data reporting if not supported 1953 if (hci_stack->local_supported_commands[0] & 0x08) break; 1954 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1955 1956 /* fall through */ 1957 1958 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1959 // skip bcm set sco pcm config on non-Broadcom chipsets 1960 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1961 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1962 1963 /* fall through */ 1964 1965 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1966 if (!hci_le_supported()){ 1967 // SKIP LE init for Classic only configuration 1968 hci_init_done(); 1969 return; 1970 } 1971 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1972 break; 1973 1974 #else /* !ENABLE_SCO_OVER_HCI */ 1975 1976 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1977 #ifdef ENABLE_SCO_OVER_PCM 1978 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1979 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1980 return; 1981 } 1982 #endif 1983 /* fall through */ 1984 1985 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1986 #ifdef ENABLE_BLE 1987 if (hci_le_supported()){ 1988 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1989 return; 1990 } 1991 #endif 1992 // SKIP LE init for Classic only configuration 1993 hci_init_done(); 1994 return; 1995 #endif /* ENABLE_SCO_OVER_HCI */ 1996 1997 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1998 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1999 // Response to command before init done state -> init done 2000 case (HCI_INIT_DONE-1): 2001 hci_init_done(); 2002 return; 2003 #endif 2004 2005 default: 2006 break; 2007 } 2008 hci_initializing_next_state(); 2009 } 2010 2011 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2012 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2013 bd_addr_t bd_address; 2014 (void)memcpy(&bd_address, conn->address, 6); 2015 2016 #ifdef ENABLE_CLASSIC 2017 // cache needed data 2018 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2019 #endif 2020 2021 // connection failed, remove entry 2022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2023 btstack_memory_hci_connection_free( conn ); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // notify client if dedicated bonding 2027 if (notify_dedicated_bonding_failed){ 2028 log_info("hci notify_dedicated_bonding_failed"); 2029 hci_emit_dedicated_bonding_result(bd_address, status); 2030 } 2031 2032 // if authentication error, also delete link key 2033 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2034 gap_drop_link_key_for_bd_addr(bd_address); 2035 } 2036 #else 2037 UNUSED(status); 2038 #endif 2039 } 2040 2041 #ifdef ENABLE_CLASSIC 2042 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2043 // SSP Controller 2044 if (features[6] & (1 << 3)){ 2045 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2046 } 2047 // eSCO 2048 if (features[3] & (1<<7)){ 2049 conn->remote_supported_features[0] |= 1; 2050 } 2051 // Extended features 2052 if (features[7] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 2; 2054 } 2055 } 2056 2057 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2058 // SSP Host 2059 if (features[0] & (1 << 0)){ 2060 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2061 } 2062 // SC Host 2063 if (features[0] & (1 << 3)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2065 } 2066 } 2067 2068 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2069 // SC Controller 2070 if (features[1] & (1 << 0)){ 2071 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2072 } 2073 } 2074 2075 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2076 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2077 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2078 if (conn->bonding_flags & BONDING_DEDICATED){ 2079 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2080 } 2081 } 2082 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2083 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2084 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2085 } 2086 2087 #endif 2088 2089 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2090 // handle BT initialization 2091 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2092 hci_initializing_event_handler(packet, size); 2093 } 2094 2095 // help with BT sleep 2096 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2097 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2098 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2099 hci_initializing_next_state(); 2100 } 2101 } 2102 2103 #ifdef ENABLE_CLASSIC 2104 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2105 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2106 conn->encryption_key_size = encryption_key_size; 2107 2108 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2109 conn->requested_security_level = LEVEL_0; 2110 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2111 return; 2112 } 2113 2114 // Request Authentication if not already done 2115 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2116 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2117 } 2118 #endif 2119 2120 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2121 UNUSED(size); 2122 2123 uint16_t manufacturer; 2124 #ifdef ENABLE_CLASSIC 2125 hci_con_handle_t handle; 2126 hci_connection_t * conn; 2127 uint8_t status; 2128 #endif 2129 // get num cmd packets - limit to 1 to reduce complexity 2130 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2131 2132 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2133 switch (opcode){ 2134 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2135 if (packet[5]) break; 2136 // terminate, name 248 chars 2137 packet[6+248] = 0; 2138 log_info("local name: %s", &packet[6]); 2139 break; 2140 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2141 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2142 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2143 uint16_t acl_len = little_endian_read_16(packet, 6); 2144 uint16_t sco_len = packet[8]; 2145 2146 // determine usable ACL/SCO payload size 2147 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2148 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2149 2150 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2151 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2152 2153 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2154 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2155 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2156 } 2157 break; 2158 case HCI_OPCODE_HCI_READ_RSSI: 2159 if (packet[5] == ERROR_CODE_SUCCESS){ 2160 uint8_t event[5]; 2161 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2162 event[1] = 3; 2163 (void)memcpy(&event[2], &packet[6], 3); 2164 hci_emit_event(event, sizeof(event), 1); 2165 } 2166 break; 2167 #ifdef ENABLE_BLE 2168 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2169 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2170 hci_stack->le_acl_packets_total_num = packet[8]; 2171 // determine usable ACL payload size 2172 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2173 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2174 } 2175 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2176 break; 2177 #endif 2178 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2179 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2180 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2181 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2182 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); 2183 break; 2184 #endif 2185 #ifdef ENABLE_LE_CENTRAL 2186 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2187 hci_stack->le_whitelist_capacity = packet[6]; 2188 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2189 break; 2190 #endif 2191 case HCI_OPCODE_HCI_READ_BD_ADDR: 2192 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2193 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)); 2194 #ifdef ENABLE_CLASSIC 2195 if (hci_stack->link_key_db){ 2196 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2197 } 2198 #endif 2199 break; 2200 #ifdef ENABLE_CLASSIC 2201 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2202 hci_emit_discoverable_enabled(hci_stack->discoverable); 2203 break; 2204 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2205 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2206 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2207 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2208 hci_emit_event(event, sizeof(event), 1); 2209 } 2210 break; 2211 #endif 2212 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2213 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // determine usable ACL packet types based on host buffer size and supported features 2217 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2218 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2219 #endif 2220 // Classic/LE 2221 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2222 break; 2223 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2224 manufacturer = little_endian_read_16(packet, 10); 2225 // map Cypress to Broadcom 2226 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2227 log_info("Treat Cypress as Broadcom"); 2228 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2229 little_endian_store_16(packet, 10, manufacturer); 2230 } 2231 hci_stack->manufacturer = manufacturer; 2232 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2233 break; 2234 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2235 hci_stack->local_supported_commands[0] = 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2244 hci_stack->local_supported_commands[1] = 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2250 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2254 if (packet[5]) return; 2255 hci_stack->synchronous_flow_control_enabled = 1; 2256 break; 2257 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2258 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2259 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2260 conn = hci_connection_for_handle(handle); 2261 if (conn != NULL) { 2262 uint8_t key_size = 0; 2263 if (status == 0){ 2264 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2265 log_info("Handle %04x key Size: %u", handle, key_size); 2266 } else { 2267 key_size = 1; 2268 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2269 } 2270 hci_handle_read_encryption_key_size_complete(conn, key_size); 2271 } 2272 break; 2273 // assert pairing complete event is emitted. 2274 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2275 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2276 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2277 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2278 // lookup connection by gap pairing addr 2279 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2280 if (conn == NULL) break; 2281 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2282 break; 2283 2284 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2285 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2286 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2287 uint8_t event[67]; 2288 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2289 event[1] = 65; 2290 (void)memset(&event[2], 0, 65); 2291 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2292 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2293 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2294 event[2] = 3; 2295 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2296 } else { 2297 event[2] = 1; 2298 } 2299 } 2300 hci_emit_event(event, sizeof(event), 0); 2301 break; 2302 } 2303 2304 // note: only needed if user does not provide OOB data 2305 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2306 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2307 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2308 if (conn == NULL) break; 2309 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2310 break; 2311 #endif 2312 #endif 2313 default: 2314 break; 2315 } 2316 } 2317 2318 #ifdef ENABLE_BLE 2319 static void event_handle_le_connection_complete(const uint8_t * packet){ 2320 bd_addr_t addr; 2321 bd_addr_type_t addr_type; 2322 hci_connection_t * conn; 2323 2324 // Connection management 2325 reverse_bd_addr(&packet[8], addr); 2326 addr_type = (bd_addr_type_t)packet[7]; 2327 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2328 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2329 2330 #ifdef ENABLE_LE_CENTRAL 2331 // handle error: error is reported only to the initiator -> outgoing connection 2332 if (packet[3]){ 2333 2334 // handle cancelled outgoing connection 2335 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2336 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2337 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2338 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2339 // reset state 2340 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2341 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2342 // get outgoing connection conn struct for direct connect 2343 conn = gap_get_outgoing_connection(); 2344 } 2345 2346 // outgoing le connection establishment is done 2347 if (conn){ 2348 // remove entry 2349 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2350 btstack_memory_hci_connection_free( conn ); 2351 } 2352 return; 2353 } 2354 #endif 2355 2356 // on success, both hosts receive connection complete event 2357 if (packet[6] == HCI_ROLE_MASTER){ 2358 #ifdef ENABLE_LE_CENTRAL 2359 // if we're master on an le connection, it was an outgoing connection and we're done with it 2360 // note: no hci_connection_t object exists yet for connect with whitelist 2361 if (hci_is_le_connection_type(addr_type)){ 2362 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2363 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2364 } 2365 #endif 2366 } else { 2367 #ifdef ENABLE_LE_PERIPHERAL 2368 // if we're slave, it was an incoming connection, advertisements have stopped 2369 hci_stack->le_advertisements_active = false; 2370 #endif 2371 } 2372 2373 // LE connections are auto-accepted, so just create a connection if there isn't one already 2374 if (!conn){ 2375 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2376 } 2377 2378 // no memory, sorry. 2379 if (!conn){ 2380 return; 2381 } 2382 2383 conn->state = OPEN; 2384 conn->role = packet[6]; 2385 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2386 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2387 2388 #ifdef ENABLE_LE_PERIPHERAL 2389 if (packet[6] == HCI_ROLE_SLAVE){ 2390 hci_update_advertisements_enabled_for_current_roles(); 2391 } 2392 #endif 2393 2394 // init unenhanced att bearer mtu 2395 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2396 conn->att_connection.mtu_exchanged = false; 2397 2398 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2399 2400 // restart timer 2401 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2402 // btstack_run_loop_add_timer(&conn->timeout); 2403 2404 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2405 2406 hci_emit_nr_connections_changed(); 2407 } 2408 #endif 2409 2410 #ifdef ENABLE_CLASSIC 2411 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){ 2412 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2413 // LEVEL_4 is tested by l2cap 2414 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2415 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2416 if (level >= LEVEL_3){ 2417 // MITM not possible without keyboard or display 2418 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2419 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2420 2421 // MITM possible if one side has keyboard and the other has keyboard or display 2422 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2423 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2424 2425 // MITM not possible if one side has only display and other side has no keyboard 2426 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2427 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2428 } 2429 // LEVEL 2 requires SSP, which is a given 2430 return true; 2431 } 2432 2433 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2434 uint16_t i; 2435 for (i=0; i < size ; i++){ 2436 if (data[i] != 0) { 2437 return false; 2438 } 2439 } 2440 return true; 2441 } 2442 2443 #endif 2444 2445 static void event_handler(uint8_t *packet, uint16_t size){ 2446 2447 uint16_t event_length = packet[1]; 2448 2449 // assert packet is complete 2450 if (size != (event_length + 2u)){ 2451 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2452 return; 2453 } 2454 2455 bd_addr_type_t addr_type; 2456 hci_con_handle_t handle; 2457 hci_connection_t * conn; 2458 int i; 2459 int create_connection_cmd; 2460 2461 #ifdef ENABLE_CLASSIC 2462 hci_link_type_t link_type; 2463 bd_addr_t addr; 2464 #endif 2465 2466 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2467 2468 switch (hci_event_packet_get_type(packet)) { 2469 2470 case HCI_EVENT_COMMAND_COMPLETE: 2471 handle_command_complete_event(packet, size); 2472 break; 2473 2474 case HCI_EVENT_COMMAND_STATUS: 2475 // get num cmd packets - limit to 1 to reduce complexity 2476 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2477 2478 // check command status to detected failed outgoing connections 2479 create_connection_cmd = 0; 2480 #ifdef ENABLE_CLASSIC 2481 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2482 create_connection_cmd = 1; 2483 } 2484 #endif 2485 #ifdef ENABLE_LE_CENTRAL 2486 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2487 create_connection_cmd = 1; 2488 } 2489 #endif 2490 if (create_connection_cmd) { 2491 uint8_t status = hci_event_command_status_get_status(packet); 2492 addr_type = hci_stack->outgoing_addr_type; 2493 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2494 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); 2495 2496 // reset outgoing address info 2497 memset(hci_stack->outgoing_addr, 0, 6); 2498 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2499 2500 // on error 2501 if (status != ERROR_CODE_SUCCESS){ 2502 #ifdef ENABLE_LE_CENTRAL 2503 if (hci_is_le_connection_type(addr_type)){ 2504 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2505 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2506 } 2507 #endif 2508 // error => outgoing connection failed 2509 if (conn != NULL){ 2510 hci_handle_connection_failed(conn, status); 2511 } 2512 } 2513 } 2514 2515 #ifdef ENABLE_CLASSIC 2516 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2517 uint8_t status = hci_event_command_status_get_status(packet); 2518 log_info("command status (inquiry), status %x", status); 2519 if (status == ERROR_CODE_SUCCESS) { 2520 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2521 } else { 2522 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2523 } 2524 } 2525 #endif 2526 break; 2527 2528 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2529 if (size < 3) return; 2530 uint16_t num_handles = packet[2]; 2531 if (size != (3u + num_handles * 4u)) return; 2532 uint16_t offset = 3; 2533 for (i=0; i<num_handles;i++){ 2534 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2535 offset += 2u; 2536 uint16_t num_packets = little_endian_read_16(packet, offset); 2537 offset += 2u; 2538 2539 conn = hci_connection_for_handle(handle); 2540 if (!conn){ 2541 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2542 continue; 2543 } 2544 2545 if (conn->num_packets_sent >= num_packets){ 2546 conn->num_packets_sent -= num_packets; 2547 } else { 2548 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2549 conn->num_packets_sent = 0; 2550 } 2551 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2552 2553 #ifdef ENABLE_CLASSIC 2554 // For SCO, we do the can_send_now_check here 2555 hci_notify_if_sco_can_send_now(); 2556 #endif 2557 } 2558 break; 2559 } 2560 2561 #ifdef ENABLE_CLASSIC 2562 case HCI_EVENT_INQUIRY_COMPLETE: 2563 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2564 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2565 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2566 hci_emit_event(event, sizeof(event), 1); 2567 } 2568 break; 2569 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2570 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2571 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2572 } 2573 break; 2574 case HCI_EVENT_CONNECTION_REQUEST: 2575 reverse_bd_addr(&packet[2], addr); 2576 link_type = (hci_link_type_t) packet[11]; 2577 2578 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2579 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2580 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2581 bd_addr_copy(hci_stack->decline_addr, addr); 2582 break; 2583 } 2584 2585 if (hci_stack->gap_classic_accept_callback != NULL){ 2586 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2587 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2588 bd_addr_copy(hci_stack->decline_addr, addr); 2589 break; 2590 } 2591 } 2592 2593 // TODO: eval COD 8-10 2594 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2595 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2596 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2597 if (!conn) { 2598 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2599 } 2600 if (!conn) { 2601 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2602 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2603 bd_addr_copy(hci_stack->decline_addr, addr); 2604 break; 2605 } 2606 conn->role = HCI_ROLE_SLAVE; 2607 conn->state = RECEIVED_CONNECTION_REQUEST; 2608 // store info about eSCO 2609 if (link_type == HCI_LINK_TYPE_ESCO){ 2610 conn->remote_supported_features[0] |= 1; 2611 } 2612 hci_run(); 2613 break; 2614 2615 case HCI_EVENT_CONNECTION_COMPLETE: 2616 // Connection management 2617 reverse_bd_addr(&packet[5], addr); 2618 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2619 addr_type = BD_ADDR_TYPE_ACL; 2620 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2621 if (conn) { 2622 if (!packet[2]){ 2623 conn->state = OPEN; 2624 conn->con_handle = little_endian_read_16(packet, 3); 2625 2626 // queue get remote feature 2627 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2628 2629 // queue set supervision timeout if we're master 2630 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2631 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2632 } 2633 2634 // restart timer 2635 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2636 btstack_run_loop_add_timer(&conn->timeout); 2637 2638 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2639 2640 hci_emit_nr_connections_changed(); 2641 } else { 2642 // connection failed 2643 hci_handle_connection_failed(conn, packet[2]); 2644 } 2645 } 2646 break; 2647 2648 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2649 reverse_bd_addr(&packet[5], addr); 2650 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2651 if (packet[2]){ 2652 // connection failed 2653 break; 2654 } 2655 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2656 if (!conn) { 2657 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2658 } 2659 if (!conn) { 2660 break; 2661 } 2662 conn->state = OPEN; 2663 conn->con_handle = little_endian_read_16(packet, 3); 2664 2665 #ifdef ENABLE_SCO_OVER_HCI 2666 // update SCO 2667 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2668 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2669 } 2670 // trigger can send now 2671 if (hci_have_usb_transport()){ 2672 hci_stack->sco_can_send_now = 1; 2673 } 2674 #endif 2675 #ifdef HAVE_SCO_TRANSPORT 2676 // configure sco transport 2677 if (hci_stack->sco_transport != NULL){ 2678 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2679 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2680 } 2681 #endif 2682 break; 2683 2684 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2685 handle = little_endian_read_16(packet, 3); 2686 conn = hci_connection_for_handle(handle); 2687 if (!conn) break; 2688 if (!packet[2]){ 2689 const uint8_t * features = &packet[5]; 2690 hci_handle_remote_features_page_0(conn, features); 2691 2692 // read extended features if possible 2693 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2694 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2695 break; 2696 } 2697 } 2698 hci_handle_remote_features_received(conn); 2699 break; 2700 2701 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2702 handle = little_endian_read_16(packet, 3); 2703 conn = hci_connection_for_handle(handle); 2704 if (!conn) break; 2705 // status = ok, page = 1 2706 if (!packet[2]) { 2707 uint8_t page_number = packet[5]; 2708 uint8_t maximum_page_number = packet[6]; 2709 const uint8_t * features = &packet[7]; 2710 bool done = false; 2711 switch (page_number){ 2712 case 1: 2713 hci_handle_remote_features_page_1(conn, features); 2714 if (maximum_page_number >= 2){ 2715 // get Secure Connections (Controller) from Page 2 if available 2716 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2717 } else { 2718 // otherwise, assume SC (Controller) == SC (Host) 2719 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2720 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2721 } 2722 done = true; 2723 } 2724 break; 2725 case 2: 2726 hci_handle_remote_features_page_2(conn, features); 2727 done = true; 2728 break; 2729 default: 2730 break; 2731 } 2732 if (!done) break; 2733 } 2734 hci_handle_remote_features_received(conn); 2735 break; 2736 2737 case HCI_EVENT_LINK_KEY_REQUEST: 2738 // request handled by hci_run() 2739 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2740 break; 2741 2742 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2743 hci_event_link_key_request_get_bd_addr(packet, addr); 2744 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2745 if (!conn) break; 2746 2747 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2748 2749 // CVE-2020-26555: ignore NULL link key 2750 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2751 if (btstack_is_null(&packet[8], 16)) break; 2752 2753 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2754 // Change Connection Encryption keeps link key type 2755 if (link_key_type != CHANGED_COMBINATION_KEY){ 2756 conn->link_key_type = link_key_type; 2757 } 2758 2759 // cache link key. link keys stored in little-endian format for legacy reasons 2760 memcpy(&conn->link_key, &packet[8], 16); 2761 2762 // only store link key: 2763 // - if bondable enabled 2764 if (hci_stack->bondable == false) break; 2765 // - if security level sufficient 2766 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2767 // - for SSP, also check if remote side requested bonding as well 2768 if (conn->link_key_type != COMBINATION_KEY){ 2769 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2770 if (!remote_bonding){ 2771 break; 2772 } 2773 } 2774 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2775 break; 2776 } 2777 2778 case HCI_EVENT_PIN_CODE_REQUEST: 2779 hci_event_pin_code_request_get_bd_addr(packet, addr); 2780 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2781 if (!conn) break; 2782 2783 hci_pairing_started(conn, false); 2784 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2785 if (!hci_stack->bondable ){ 2786 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2787 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2788 hci_run(); 2789 return; 2790 } 2791 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2792 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2793 log_info("Level 4 required, but SC not supported -> abort"); 2794 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2795 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2796 hci_run(); 2797 return; 2798 } 2799 break; 2800 2801 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2802 hci_event_io_capability_response_get_bd_addr(packet, addr); 2803 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2804 if (!conn) break; 2805 2806 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2807 hci_pairing_started(conn, true); 2808 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2809 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2810 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2811 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2812 #endif 2813 break; 2814 2815 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2816 hci_event_io_capability_response_get_bd_addr(packet, addr); 2817 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2818 if (!conn) break; 2819 2820 hci_connection_timestamp(conn); 2821 2822 hci_pairing_started(conn, true); 2823 2824 // assess security: LEVEL 4 requires SC 2825 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2826 log_info("Level 4 required, but SC not supported -> abort"); 2827 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2828 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2829 break; 2830 } 2831 2832 // assess security based on io capabilities 2833 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2834 // get requested security level 2835 gap_security_level_t requested_security_level = conn->requested_security_level; 2836 if (hci_stack->gap_secure_connections_only_mode){ 2837 requested_security_level = LEVEL_4; 2838 } 2839 2840 // responder: fully validate io caps of both sides as well as OOB data 2841 bool security_possible = false; 2842 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2843 2844 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2845 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2846 // so we merge the OOB data availability 2847 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2848 if (conn->classic_oob_c_192 != NULL){ 2849 have_oob_data |= 1; 2850 } 2851 if (conn->classic_oob_c_256 != NULL){ 2852 have_oob_data |= 2; 2853 } 2854 // for up to Level 3, either P-192 as well as P-256 will do 2855 // 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 2856 // if remote does not SC, we should not receive P-256 data either 2857 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2858 security_possible = true; 2859 } 2860 // for Level 4, P-256 is needed 2861 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2862 security_possible = true; 2863 } 2864 #endif 2865 2866 if (security_possible == false){ 2867 log_info("IOCap/OOB insufficient for level %u -> abort", conn->requested_security_level); 2868 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2869 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2870 break; 2871 } 2872 } else { 2873 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2874 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2875 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2876 log_info("Level 3+ required, but no input/output -> abort"); 2877 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2878 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2879 break; 2880 } 2881 #endif 2882 } 2883 2884 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2885 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2886 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2887 } else { 2888 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2889 } 2890 #endif 2891 break; 2892 2893 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2894 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2895 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2896 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2897 if (!conn) break; 2898 2899 hci_connection_timestamp(conn); 2900 2901 hci_pairing_started(conn, true); 2902 2903 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2904 break; 2905 #endif 2906 2907 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2908 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2909 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2910 if (!conn) break; 2911 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2912 if (hci_stack->ssp_auto_accept){ 2913 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2914 }; 2915 } else { 2916 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2917 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2918 // don't forward event to app 2919 hci_run(); 2920 return; 2921 } 2922 break; 2923 2924 case HCI_EVENT_USER_PASSKEY_REQUEST: 2925 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2926 if (hci_stack->ssp_auto_accept){ 2927 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2928 }; 2929 break; 2930 2931 case HCI_EVENT_MODE_CHANGE: 2932 handle = hci_event_mode_change_get_handle(packet); 2933 conn = hci_connection_for_handle(handle); 2934 if (!conn) break; 2935 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2936 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2937 break; 2938 #endif 2939 2940 case HCI_EVENT_ENCRYPTION_CHANGE: 2941 handle = hci_event_encryption_change_get_connection_handle(packet); 2942 conn = hci_connection_for_handle(handle); 2943 if (!conn) break; 2944 if (hci_event_encryption_change_get_status(packet) == 0u) { 2945 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2946 if (encryption_enabled){ 2947 if (hci_is_le_connection(conn)){ 2948 // For LE, we accept connection as encrypted 2949 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2950 } 2951 #ifdef ENABLE_CLASSIC 2952 else { 2953 2954 // dedicated bonding: send result and disconnect 2955 if (conn->bonding_flags & BONDING_DEDICATED){ 2956 conn->bonding_flags &= ~BONDING_DEDICATED; 2957 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2958 conn->bonding_status = packet[2]; 2959 break; 2960 } 2961 2962 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2963 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2964 bool connected_uses_aes_ccm = encryption_enabled == 2; 2965 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2966 log_info("SC during pairing, but only E0 now -> abort"); 2967 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2968 break; 2969 } 2970 2971 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2972 if (connected_uses_aes_ccm){ 2973 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2974 } 2975 2976 #ifdef ENABLE_TESTING_SUPPORT 2977 // work around for issue with PTS dongle 2978 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2979 #endif 2980 2981 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2982 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2983 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2984 } else { 2985 // if not, pretend everything is perfect 2986 hci_handle_read_encryption_key_size_complete(conn, 16); 2987 } 2988 } 2989 #endif 2990 } else { 2991 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2992 } 2993 } 2994 2995 break; 2996 2997 #ifdef ENABLE_CLASSIC 2998 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2999 handle = hci_event_authentication_complete_get_connection_handle(packet); 3000 conn = hci_connection_for_handle(handle); 3001 if (!conn) break; 3002 3003 // clear authentication active flag 3004 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3005 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3006 3007 // authenticated only if auth status == 0 3008 if (hci_event_authentication_complete_get_status(packet) == 0){ 3009 // authenticated 3010 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3011 3012 // If not already encrypted, start encryption 3013 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3014 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3015 break; 3016 } 3017 } 3018 3019 // emit updated security level 3020 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3021 break; 3022 3023 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3024 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3025 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3026 if (!conn) break; 3027 3028 // treat successfully paired connection as authenticated 3029 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3030 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3031 } 3032 3033 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3034 break; 3035 #endif 3036 3037 // HCI_EVENT_DISCONNECTION_COMPLETE 3038 // has been split, to first notify stack before shutting connection down 3039 // see end of function, too. 3040 case HCI_EVENT_DISCONNECTION_COMPLETE: 3041 if (packet[2]) break; // status != 0 3042 handle = little_endian_read_16(packet, 3); 3043 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3044 if (hci_stack->acl_fragmentation_total_size > 0u) { 3045 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3046 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3047 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3048 hci_stack->acl_fragmentation_total_size = 0; 3049 hci_stack->acl_fragmentation_pos = 0; 3050 if (release_buffer){ 3051 hci_release_packet_buffer(); 3052 } 3053 } 3054 } 3055 3056 conn = hci_connection_for_handle(handle); 3057 if (!conn) break; 3058 #ifdef ENABLE_CLASSIC 3059 // pairing failed if it was ongoing 3060 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3061 #endif 3062 // mark connection for shutdown 3063 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3064 3065 // emit dedicatd bonding event 3066 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3067 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3068 } 3069 3070 #ifdef ENABLE_BLE 3071 #ifdef ENABLE_LE_PERIPHERAL 3072 // re-enable advertisements for le connections if active 3073 if (hci_is_le_connection(conn)){ 3074 hci_update_advertisements_enabled_for_current_roles(); 3075 } 3076 #endif 3077 #endif 3078 break; 3079 3080 case HCI_EVENT_HARDWARE_ERROR: 3081 log_error("Hardware Error: 0x%02x", packet[2]); 3082 if (hci_stack->hardware_error_callback){ 3083 (*hci_stack->hardware_error_callback)(packet[2]); 3084 } else { 3085 // if no special requests, just reboot stack 3086 hci_power_control_off(); 3087 hci_power_control_on(); 3088 } 3089 break; 3090 3091 #ifdef ENABLE_CLASSIC 3092 case HCI_EVENT_ROLE_CHANGE: 3093 if (packet[2]) break; // status != 0 3094 reverse_bd_addr(&packet[3], addr); 3095 addr_type = BD_ADDR_TYPE_ACL; 3096 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3097 if (!conn) break; 3098 conn->role = packet[9]; 3099 break; 3100 #endif 3101 3102 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3103 // release packet buffer only for asynchronous transport and if there are not further fragements 3104 if (hci_transport_synchronous()) { 3105 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3106 return; // instead of break: to avoid re-entering hci_run() 3107 } 3108 hci_stack->acl_fragmentation_tx_active = 0; 3109 if (hci_stack->acl_fragmentation_total_size) break; 3110 hci_release_packet_buffer(); 3111 3112 // L2CAP receives this event via the hci_emit_event below 3113 3114 #ifdef ENABLE_CLASSIC 3115 // For SCO, we do the can_send_now_check here 3116 hci_notify_if_sco_can_send_now(); 3117 #endif 3118 break; 3119 3120 #ifdef ENABLE_CLASSIC 3121 case HCI_EVENT_SCO_CAN_SEND_NOW: 3122 // For SCO, we do the can_send_now_check here 3123 hci_stack->sco_can_send_now = 1; 3124 hci_notify_if_sco_can_send_now(); 3125 return; 3126 3127 // explode inquriy results for easier consumption 3128 case HCI_EVENT_INQUIRY_RESULT: 3129 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3130 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3131 gap_inquiry_explode(packet, size); 3132 break; 3133 #endif 3134 3135 #ifdef ENABLE_BLE 3136 case HCI_EVENT_LE_META: 3137 switch (packet[2]){ 3138 #ifdef ENABLE_LE_CENTRAL 3139 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3140 // log_info("advertising report received"); 3141 if (!hci_stack->le_scanning_enabled) break; 3142 le_handle_advertisement_report(packet, size); 3143 break; 3144 #endif 3145 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3146 event_handle_le_connection_complete(packet); 3147 break; 3148 3149 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3150 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3151 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3152 conn = hci_connection_for_handle(handle); 3153 if (!conn) break; 3154 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3155 break; 3156 3157 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3158 // connection 3159 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3160 conn = hci_connection_for_handle(handle); 3161 if (conn) { 3162 // read arguments 3163 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3164 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3165 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3166 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3167 3168 // validate against current connection parameter range 3169 le_connection_parameter_range_t existing_range; 3170 gap_get_connection_parameter_range(&existing_range); 3171 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3172 if (update_parameter){ 3173 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3174 conn->le_conn_interval_min = le_conn_interval_min; 3175 conn->le_conn_interval_max = le_conn_interval_max; 3176 conn->le_conn_latency = le_conn_latency; 3177 conn->le_supervision_timeout = le_supervision_timeout; 3178 } else { 3179 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3180 } 3181 } 3182 break; 3183 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3184 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3185 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3186 conn = hci_connection_for_handle(handle); 3187 if (conn) { 3188 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3189 } 3190 break; 3191 #endif 3192 default: 3193 break; 3194 } 3195 break; 3196 #endif 3197 case HCI_EVENT_VENDOR_SPECIFIC: 3198 // Vendor specific commands often create vendor specific event instead of num completed packets 3199 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3200 switch (hci_stack->manufacturer){ 3201 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3202 hci_stack->num_cmd_packets = 1; 3203 break; 3204 default: 3205 break; 3206 } 3207 break; 3208 default: 3209 break; 3210 } 3211 3212 handle_event_for_current_stack_state(packet, size); 3213 3214 // notify upper stack 3215 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3216 3217 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3218 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3219 handle = little_endian_read_16(packet, 3); 3220 hci_connection_t * aConn = hci_connection_for_handle(handle); 3221 // discard connection if app did not trigger a reconnect in the event handler 3222 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3223 hci_shutdown_connection(aConn); 3224 } 3225 } 3226 3227 // execute main loop 3228 hci_run(); 3229 } 3230 3231 #ifdef ENABLE_CLASSIC 3232 3233 #ifdef ENABLE_SCO_OVER_HCI 3234 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3235 static void sco_schedule_tx(hci_connection_t * conn); 3236 3237 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3238 log_debug("SCO TX Timeout"); 3239 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3240 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3241 if (!conn) return; 3242 3243 // trigger send 3244 conn->sco_tx_ready = 1; 3245 // extra packet if CVSD but SCO buffer is too short 3246 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3247 conn->sco_tx_ready++; 3248 } 3249 hci_notify_if_sco_can_send_now(); 3250 } 3251 3252 3253 #define SCO_TX_AFTER_RX_MS (6) 3254 3255 static void sco_schedule_tx(hci_connection_t * conn){ 3256 3257 uint32_t now = btstack_run_loop_get_time_ms(); 3258 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3259 int time_delta_ms = sco_tx_ms - now; 3260 3261 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3262 3263 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3264 btstack_run_loop_remove_timer(timer); 3265 btstack_run_loop_set_timer(timer, time_delta_ms); 3266 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3267 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3268 btstack_run_loop_add_timer(timer); 3269 } 3270 #endif 3271 3272 static void sco_handler(uint8_t * packet, uint16_t size){ 3273 // lookup connection struct 3274 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3275 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3276 if (!conn) return; 3277 3278 #ifdef ENABLE_SCO_OVER_HCI 3279 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3280 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3281 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3282 packet[2] = 0x3c; 3283 memmove(&packet[3], &packet[23], 63); 3284 size = 63; 3285 } 3286 } 3287 3288 if (hci_have_usb_transport()){ 3289 // Nothing to do 3290 } else { 3291 // 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); 3292 if (hci_stack->synchronous_flow_control_enabled == 0){ 3293 uint32_t now = btstack_run_loop_get_time_ms(); 3294 3295 if (!conn->sco_rx_valid){ 3296 // ignore first 10 packets 3297 conn->sco_rx_count++; 3298 // log_debug("sco rx count %u", conn->sco_rx_count); 3299 if (conn->sco_rx_count == 10) { 3300 // use first timestamp as is and pretent it just started 3301 conn->sco_rx_ms = now; 3302 conn->sco_rx_valid = 1; 3303 conn->sco_rx_count = 0; 3304 sco_schedule_tx(conn); 3305 } 3306 } else { 3307 // track expected arrival timme 3308 conn->sco_rx_count++; 3309 conn->sco_rx_ms += 7; 3310 int delta = (int32_t) (now - conn->sco_rx_ms); 3311 if (delta > 0){ 3312 conn->sco_rx_ms++; 3313 } 3314 // log_debug("sco rx %u", conn->sco_rx_ms); 3315 sco_schedule_tx(conn); 3316 } 3317 } 3318 } 3319 #endif 3320 3321 // deliver to app 3322 if (hci_stack->sco_packet_handler) { 3323 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3324 } 3325 3326 #ifdef HAVE_SCO_TRANSPORT 3327 // We can send one packet for each received packet 3328 conn->sco_tx_ready++; 3329 hci_notify_if_sco_can_send_now(); 3330 #endif 3331 3332 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3333 conn->num_packets_completed++; 3334 hci_stack->host_completed_packets = 1; 3335 hci_run(); 3336 #endif 3337 } 3338 #endif 3339 3340 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3341 hci_dump_packet(packet_type, 1, packet, size); 3342 switch (packet_type) { 3343 case HCI_EVENT_PACKET: 3344 event_handler(packet, size); 3345 break; 3346 case HCI_ACL_DATA_PACKET: 3347 acl_handler(packet, size); 3348 break; 3349 #ifdef ENABLE_CLASSIC 3350 case HCI_SCO_DATA_PACKET: 3351 sco_handler(packet, size); 3352 break; 3353 #endif 3354 default: 3355 break; 3356 } 3357 } 3358 3359 /** 3360 * @brief Add event packet handler. 3361 */ 3362 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3363 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3364 } 3365 3366 3367 /** Register HCI packet handlers */ 3368 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3369 hci_stack->acl_packet_handler = handler; 3370 } 3371 3372 #ifdef ENABLE_CLASSIC 3373 /** 3374 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3375 */ 3376 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3377 hci_stack->sco_packet_handler = handler; 3378 } 3379 #endif 3380 3381 static void hci_state_reset(void){ 3382 // no connections yet 3383 hci_stack->connections = NULL; 3384 3385 // keep discoverable/connectable as this has been requested by the client(s) 3386 // hci_stack->discoverable = 0; 3387 // hci_stack->connectable = 0; 3388 // hci_stack->bondable = 1; 3389 // hci_stack->own_addr_type = 0; 3390 3391 // buffer is free 3392 hci_stack->hci_packet_buffer_reserved = 0; 3393 3394 // no pending cmds 3395 hci_stack->decline_reason = 0; 3396 hci_stack->new_scan_enable_value = 0xff; 3397 3398 hci_stack->secure_connections_active = false; 3399 3400 #ifdef ENABLE_CLASSIC 3401 hci_stack->new_page_scan_interval = 0xffff; 3402 hci_stack->new_page_scan_window = 0xffff; 3403 hci_stack->new_page_scan_type = 0xff; 3404 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3405 #endif 3406 3407 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3408 hci_stack->classic_read_local_oob_data = true; 3409 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3410 #endif 3411 3412 // LE 3413 #ifdef ENABLE_BLE 3414 memset(hci_stack->le_random_address, 0, 6); 3415 hci_stack->le_random_address_set = 0; 3416 #endif 3417 #ifdef ENABLE_LE_CENTRAL 3418 hci_stack->le_scanning_active = false; 3419 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3420 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3421 hci_stack->le_whitelist_capacity = 0; 3422 #endif 3423 #ifdef ENABLE_LE_PERIPHERAL 3424 hci_stack->le_advertisements_active = false; 3425 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3426 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3427 } 3428 if (hci_stack->le_advertisements_data != NULL){ 3429 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3430 } 3431 #endif 3432 } 3433 3434 #ifdef ENABLE_CLASSIC 3435 /** 3436 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3437 */ 3438 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3439 // store and open remote device db 3440 hci_stack->link_key_db = link_key_db; 3441 if (hci_stack->link_key_db) { 3442 hci_stack->link_key_db->open(); 3443 } 3444 } 3445 #endif 3446 3447 void hci_init(const hci_transport_t *transport, const void *config){ 3448 3449 #ifdef HAVE_MALLOC 3450 if (!hci_stack) { 3451 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3452 } 3453 #else 3454 hci_stack = &hci_stack_static; 3455 #endif 3456 memset(hci_stack, 0, sizeof(hci_stack_t)); 3457 3458 // reference to use transport layer implementation 3459 hci_stack->hci_transport = transport; 3460 3461 // reference to used config 3462 hci_stack->config = config; 3463 3464 // setup pointer for outgoing packet buffer 3465 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3466 3467 // max acl payload size defined in config.h 3468 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3469 3470 // register packet handlers with transport 3471 transport->register_packet_handler(&packet_handler); 3472 3473 hci_stack->state = HCI_STATE_OFF; 3474 3475 // class of device 3476 hci_stack->class_of_device = 0x007a020c; // Smartphone 3477 3478 // bondable by default 3479 hci_stack->bondable = 1; 3480 3481 #ifdef ENABLE_CLASSIC 3482 // classic name 3483 hci_stack->local_name = default_classic_name; 3484 3485 // Master slave policy 3486 hci_stack->master_slave_policy = 1; 3487 3488 // Allow Role Switch 3489 hci_stack->allow_role_switch = 1; 3490 3491 // Default / minimum security level = 2 3492 hci_stack->gap_security_level = LEVEL_2; 3493 3494 // Default Security Mode 4 3495 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3496 3497 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3498 hci_stack->gap_required_encyrption_key_size = 7; 3499 3500 // Link Supervision Timeout 3501 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3502 3503 #endif 3504 3505 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3506 hci_stack->ssp_enable = 1; 3507 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3508 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3509 hci_stack->ssp_auto_accept = 1; 3510 3511 // Secure Connections: enable (requires support from Controller) 3512 hci_stack->secure_connections_enable = true; 3513 3514 // voice setting - signed 16 bit pcm data with CVSD over the air 3515 hci_stack->sco_voice_setting = 0x60; 3516 3517 #ifdef ENABLE_LE_CENTRAL 3518 // connection parameter to use for outgoing connections 3519 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3520 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3521 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3522 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3523 hci_stack->le_connection_latency = 4; // 4 3524 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3525 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3526 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3527 3528 // default LE Scanning 3529 hci_stack->le_scan_type = 0x1; // active 3530 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3531 hci_stack->le_scan_window = 0x30; // 30 ms 3532 #endif 3533 3534 #ifdef ENABLE_LE_PERIPHERAL 3535 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3536 #endif 3537 3538 // connection parameter range used to answer connection parameter update requests in l2cap 3539 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3540 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3541 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3542 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3543 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3544 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3545 3546 hci_state_reset(); 3547 } 3548 3549 void hci_deinit(void){ 3550 #ifdef HAVE_MALLOC 3551 if (hci_stack) { 3552 free(hci_stack); 3553 } 3554 #endif 3555 hci_stack = NULL; 3556 3557 #ifdef ENABLE_CLASSIC 3558 disable_l2cap_timeouts = 0; 3559 #endif 3560 } 3561 3562 /** 3563 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3564 */ 3565 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3566 hci_stack->chipset = chipset_driver; 3567 3568 // reset chipset driver - init is also called on power_up 3569 if (hci_stack->chipset && hci_stack->chipset->init){ 3570 hci_stack->chipset->init(hci_stack->config); 3571 } 3572 } 3573 3574 /** 3575 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3576 */ 3577 void hci_set_control(const btstack_control_t *hardware_control){ 3578 // references to used control implementation 3579 hci_stack->control = hardware_control; 3580 // init with transport config 3581 hardware_control->init(hci_stack->config); 3582 } 3583 3584 void hci_close(void){ 3585 3586 #ifdef ENABLE_CLASSIC 3587 // close remote device db 3588 if (hci_stack->link_key_db) { 3589 hci_stack->link_key_db->close(); 3590 } 3591 #endif 3592 3593 btstack_linked_list_iterator_t lit; 3594 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3595 while (btstack_linked_list_iterator_has_next(&lit)){ 3596 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3597 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3598 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3599 hci_shutdown_connection(connection); 3600 } 3601 3602 hci_power_control(HCI_POWER_OFF); 3603 3604 #ifdef HAVE_MALLOC 3605 free(hci_stack); 3606 #endif 3607 hci_stack = NULL; 3608 } 3609 3610 #ifdef HAVE_SCO_TRANSPORT 3611 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3612 hci_stack->sco_transport = sco_transport; 3613 sco_transport->register_packet_handler(&packet_handler); 3614 } 3615 #endif 3616 3617 #ifdef ENABLE_CLASSIC 3618 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3619 // validate ranage and set 3620 if (encryption_key_size < 7) return; 3621 if (encryption_key_size > 16) return; 3622 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3623 } 3624 3625 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3626 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3627 hci_stack->gap_security_mode = security_mode; 3628 return ERROR_CODE_SUCCESS; 3629 } else { 3630 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3631 } 3632 } 3633 3634 gap_security_mode_t gap_get_security_mode(void){ 3635 return hci_stack->gap_security_mode; 3636 } 3637 3638 void gap_set_security_level(gap_security_level_t security_level){ 3639 hci_stack->gap_security_level = security_level; 3640 } 3641 3642 gap_security_level_t gap_get_security_level(void){ 3643 if (hci_stack->gap_secure_connections_only_mode){ 3644 return LEVEL_4; 3645 } 3646 return hci_stack->gap_security_level; 3647 } 3648 3649 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3650 hci_stack->gap_minimal_service_security_level = security_level; 3651 } 3652 3653 void gap_set_secure_connections_only_mode(bool enable){ 3654 hci_stack->gap_secure_connections_only_mode = enable; 3655 } 3656 3657 bool gap_get_secure_connections_only_mode(void){ 3658 return hci_stack->gap_secure_connections_only_mode; 3659 } 3660 #endif 3661 3662 #ifdef ENABLE_CLASSIC 3663 void gap_set_class_of_device(uint32_t class_of_device){ 3664 hci_stack->class_of_device = class_of_device; 3665 } 3666 3667 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3668 hci_stack->default_link_policy_settings = default_link_policy_settings; 3669 } 3670 3671 void gap_set_allow_role_switch(bool allow_role_switch){ 3672 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3673 } 3674 3675 uint8_t hci_get_allow_role_switch(void){ 3676 return hci_stack->allow_role_switch; 3677 } 3678 3679 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3680 hci_stack->link_supervision_timeout = link_supervision_timeout; 3681 } 3682 3683 void hci_disable_l2cap_timeout_check(void){ 3684 disable_l2cap_timeouts = 1; 3685 } 3686 #endif 3687 3688 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3689 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3690 void hci_set_bd_addr(bd_addr_t addr){ 3691 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3692 hci_stack->custom_bd_addr_set = 1; 3693 } 3694 #endif 3695 3696 // State-Module-Driver overview 3697 // state module low-level 3698 // HCI_STATE_OFF off close 3699 // HCI_STATE_INITIALIZING, on open 3700 // HCI_STATE_WORKING, on open 3701 // HCI_STATE_HALTING, on open 3702 // HCI_STATE_SLEEPING, off/sleep close 3703 // HCI_STATE_FALLING_ASLEEP on open 3704 3705 static int hci_power_control_on(void){ 3706 3707 // power on 3708 int err = 0; 3709 if (hci_stack->control && hci_stack->control->on){ 3710 err = (*hci_stack->control->on)(); 3711 } 3712 if (err){ 3713 log_error( "POWER_ON failed"); 3714 hci_emit_hci_open_failed(); 3715 return err; 3716 } 3717 3718 // int chipset driver 3719 if (hci_stack->chipset && hci_stack->chipset->init){ 3720 hci_stack->chipset->init(hci_stack->config); 3721 } 3722 3723 // init transport 3724 if (hci_stack->hci_transport->init){ 3725 hci_stack->hci_transport->init(hci_stack->config); 3726 } 3727 3728 // open transport 3729 err = hci_stack->hci_transport->open(); 3730 if (err){ 3731 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3732 if (hci_stack->control && hci_stack->control->off){ 3733 (*hci_stack->control->off)(); 3734 } 3735 hci_emit_hci_open_failed(); 3736 return err; 3737 } 3738 return 0; 3739 } 3740 3741 static void hci_power_control_off(void){ 3742 3743 log_info("hci_power_control_off"); 3744 3745 // close low-level device 3746 hci_stack->hci_transport->close(); 3747 3748 log_info("hci_power_control_off - hci_transport closed"); 3749 3750 // power off 3751 if (hci_stack->control && hci_stack->control->off){ 3752 (*hci_stack->control->off)(); 3753 } 3754 3755 log_info("hci_power_control_off - control closed"); 3756 3757 hci_stack->state = HCI_STATE_OFF; 3758 } 3759 3760 static void hci_power_control_sleep(void){ 3761 3762 log_info("hci_power_control_sleep"); 3763 3764 #if 0 3765 // don't close serial port during sleep 3766 3767 // close low-level device 3768 hci_stack->hci_transport->close(hci_stack->config); 3769 #endif 3770 3771 // sleep mode 3772 if (hci_stack->control && hci_stack->control->sleep){ 3773 (*hci_stack->control->sleep)(); 3774 } 3775 3776 hci_stack->state = HCI_STATE_SLEEPING; 3777 } 3778 3779 static int hci_power_control_wake(void){ 3780 3781 log_info("hci_power_control_wake"); 3782 3783 // wake on 3784 if (hci_stack->control && hci_stack->control->wake){ 3785 (*hci_stack->control->wake)(); 3786 } 3787 3788 #if 0 3789 // open low-level device 3790 int err = hci_stack->hci_transport->open(hci_stack->config); 3791 if (err){ 3792 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3793 if (hci_stack->control && hci_stack->control->off){ 3794 (*hci_stack->control->off)(); 3795 } 3796 hci_emit_hci_open_failed(); 3797 return err; 3798 } 3799 #endif 3800 3801 return 0; 3802 } 3803 3804 static void hci_power_transition_to_initializing(void){ 3805 // set up state machine 3806 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3807 hci_stack->hci_packet_buffer_reserved = 0; 3808 hci_stack->state = HCI_STATE_INITIALIZING; 3809 hci_stack->substate = HCI_INIT_SEND_RESET; 3810 } 3811 3812 // returns error 3813 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3814 int err; 3815 switch (power_mode){ 3816 case HCI_POWER_ON: 3817 err = hci_power_control_on(); 3818 if (err != 0) { 3819 log_error("hci_power_control_on() error %d", err); 3820 return err; 3821 } 3822 hci_power_transition_to_initializing(); 3823 break; 3824 case HCI_POWER_OFF: 3825 // do nothing 3826 break; 3827 case HCI_POWER_SLEEP: 3828 // do nothing (with SLEEP == OFF) 3829 break; 3830 default: 3831 btstack_assert(false); 3832 break; 3833 } 3834 return ERROR_CODE_SUCCESS; 3835 } 3836 3837 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3838 switch (power_mode){ 3839 case HCI_POWER_ON: 3840 // do nothing 3841 break; 3842 case HCI_POWER_OFF: 3843 // no connections yet, just turn it off 3844 hci_power_control_off(); 3845 break; 3846 case HCI_POWER_SLEEP: 3847 // no connections yet, just turn it off 3848 hci_power_control_sleep(); 3849 break; 3850 default: 3851 btstack_assert(false); 3852 break; 3853 } 3854 return ERROR_CODE_SUCCESS; 3855 } 3856 3857 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3858 switch (power_mode){ 3859 case HCI_POWER_ON: 3860 // do nothing 3861 break; 3862 case HCI_POWER_OFF: 3863 // see hci_run 3864 hci_stack->state = HCI_STATE_HALTING; 3865 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3866 break; 3867 case HCI_POWER_SLEEP: 3868 // see hci_run 3869 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3870 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3871 break; 3872 default: 3873 btstack_assert(false); 3874 break; 3875 } 3876 return ERROR_CODE_SUCCESS; 3877 } 3878 3879 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3880 switch (power_mode){ 3881 case HCI_POWER_ON: 3882 hci_power_transition_to_initializing(); 3883 break; 3884 case HCI_POWER_OFF: 3885 // do nothing 3886 break; 3887 case HCI_POWER_SLEEP: 3888 // see hci_run 3889 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3890 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3891 break; 3892 default: 3893 btstack_assert(false); 3894 break; 3895 } 3896 return ERROR_CODE_SUCCESS; 3897 } 3898 3899 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3900 switch (power_mode){ 3901 case HCI_POWER_ON: 3902 3903 #ifdef HAVE_PLATFORM_IPHONE_OS 3904 // nothing to do, if H4 supports power management 3905 if (btstack_control_iphone_power_management_enabled()){ 3906 hci_stack->state = HCI_STATE_INITIALIZING; 3907 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3908 break; 3909 } 3910 #endif 3911 hci_power_transition_to_initializing(); 3912 break; 3913 case HCI_POWER_OFF: 3914 // see hci_run 3915 hci_stack->state = HCI_STATE_HALTING; 3916 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3917 break; 3918 case HCI_POWER_SLEEP: 3919 // do nothing 3920 break; 3921 default: 3922 btstack_assert(false); 3923 break; 3924 } 3925 return ERROR_CODE_SUCCESS; 3926 } 3927 3928 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3929 int err; 3930 switch (power_mode){ 3931 case HCI_POWER_ON: 3932 #ifdef HAVE_PLATFORM_IPHONE_OS 3933 // nothing to do, if H4 supports power management 3934 if (btstack_control_iphone_power_management_enabled()){ 3935 hci_stack->state = HCI_STATE_INITIALIZING; 3936 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3937 hci_update_scan_enable(); 3938 break; 3939 } 3940 #endif 3941 err = hci_power_control_wake(); 3942 if (err) return err; 3943 hci_power_transition_to_initializing(); 3944 break; 3945 case HCI_POWER_OFF: 3946 hci_stack->state = HCI_STATE_HALTING; 3947 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3948 break; 3949 case HCI_POWER_SLEEP: 3950 // do nothing 3951 break; 3952 default: 3953 btstack_assert(false); 3954 break; 3955 } 3956 return ERROR_CODE_SUCCESS; 3957 } 3958 3959 int hci_power_control(HCI_POWER_MODE power_mode){ 3960 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3961 int err = 0; 3962 switch (hci_stack->state){ 3963 case HCI_STATE_OFF: 3964 err = hci_power_control_state_off(power_mode); 3965 break; 3966 case HCI_STATE_INITIALIZING: 3967 err = hci_power_control_state_initializing(power_mode); 3968 break; 3969 case HCI_STATE_WORKING: 3970 err = hci_power_control_state_working(power_mode); 3971 break; 3972 case HCI_STATE_HALTING: 3973 err = hci_power_control_state_halting(power_mode); 3974 break; 3975 case HCI_STATE_FALLING_ASLEEP: 3976 err = hci_power_control_state_falling_asleep(power_mode); 3977 break; 3978 case HCI_STATE_SLEEPING: 3979 err = hci_power_control_state_sleeping(power_mode); 3980 break; 3981 default: 3982 btstack_assert(false); 3983 break; 3984 } 3985 if (err != 0){ 3986 return err; 3987 } 3988 3989 // create internal event 3990 hci_emit_state(); 3991 3992 // trigger next/first action 3993 hci_run(); 3994 3995 return 0; 3996 } 3997 3998 3999 #ifdef ENABLE_CLASSIC 4000 4001 static void hci_update_scan_enable(void){ 4002 // 2 = page scan, 1 = inq scan 4003 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4004 hci_run(); 4005 } 4006 4007 void gap_discoverable_control(uint8_t enable){ 4008 if (enable) enable = 1; // normalize argument 4009 4010 if (hci_stack->discoverable == enable){ 4011 hci_emit_discoverable_enabled(hci_stack->discoverable); 4012 return; 4013 } 4014 4015 hci_stack->discoverable = enable; 4016 hci_update_scan_enable(); 4017 } 4018 4019 void gap_connectable_control(uint8_t enable){ 4020 if (enable) enable = 1; // normalize argument 4021 4022 // don't emit event 4023 if (hci_stack->connectable == enable) return; 4024 4025 hci_stack->connectable = enable; 4026 hci_update_scan_enable(); 4027 } 4028 #endif 4029 4030 void gap_local_bd_addr(bd_addr_t address_buffer){ 4031 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4032 } 4033 4034 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4035 static void hci_host_num_completed_packets(void){ 4036 4037 // create packet manually as arrays are not supported and num_commands should not get reduced 4038 hci_reserve_packet_buffer(); 4039 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4040 4041 uint16_t size = 0; 4042 uint16_t num_handles = 0; 4043 packet[size++] = 0x35; 4044 packet[size++] = 0x0c; 4045 size++; // skip param len 4046 size++; // skip num handles 4047 4048 // add { handle, packets } entries 4049 btstack_linked_item_t * it; 4050 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4051 hci_connection_t * connection = (hci_connection_t *) it; 4052 if (connection->num_packets_completed){ 4053 little_endian_store_16(packet, size, connection->con_handle); 4054 size += 2; 4055 little_endian_store_16(packet, size, connection->num_packets_completed); 4056 size += 2; 4057 // 4058 num_handles++; 4059 connection->num_packets_completed = 0; 4060 } 4061 } 4062 4063 packet[2] = size - 3; 4064 packet[3] = num_handles; 4065 4066 hci_stack->host_completed_packets = 0; 4067 4068 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4069 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4070 4071 // release packet buffer for synchronous transport implementations 4072 if (hci_transport_synchronous()){ 4073 hci_release_packet_buffer(); 4074 hci_emit_transport_packet_sent(); 4075 } 4076 } 4077 #endif 4078 4079 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4080 UNUSED(ds); 4081 hci_stack->substate = HCI_HALTING_CLOSE; 4082 // allow packet handlers to defer final shutdown 4083 hci_emit_state(); 4084 hci_run(); 4085 } 4086 4087 static bool hci_run_acl_fragments(void){ 4088 if (hci_stack->acl_fragmentation_total_size > 0u) { 4089 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4090 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4091 if (connection) { 4092 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4093 hci_send_acl_packet_fragments(connection); 4094 return true; 4095 } 4096 } else { 4097 // connection gone -> discard further fragments 4098 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4099 hci_stack->acl_fragmentation_total_size = 0; 4100 hci_stack->acl_fragmentation_pos = 0; 4101 } 4102 } 4103 return false; 4104 } 4105 4106 #ifdef ENABLE_CLASSIC 4107 static bool hci_run_general_gap_classic(void){ 4108 4109 // decline incoming connections 4110 if (hci_stack->decline_reason){ 4111 uint8_t reason = hci_stack->decline_reason; 4112 hci_stack->decline_reason = 0; 4113 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4114 return true; 4115 } 4116 // write page scan activity 4117 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4118 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4119 hci_stack->new_page_scan_interval = 0xffff; 4120 hci_stack->new_page_scan_window = 0xffff; 4121 return true; 4122 } 4123 // write page scan type 4124 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4125 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4126 hci_stack->new_page_scan_type = 0xff; 4127 return true; 4128 } 4129 // send scan enable 4130 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4131 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4132 hci_stack->new_scan_enable_value = 0xff; 4133 return true; 4134 } 4135 // start/stop inquiry 4136 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4137 uint8_t duration = hci_stack->inquiry_state; 4138 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4139 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4140 return true; 4141 } 4142 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4143 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4144 hci_send_cmd(&hci_inquiry_cancel); 4145 return true; 4146 } 4147 // remote name request 4148 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4149 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4150 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4151 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4152 return true; 4153 } 4154 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4155 // Local OOB data 4156 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4157 hci_stack->classic_read_local_oob_data = false; 4158 if (hci_stack->local_supported_commands[1] & 0x10u){ 4159 hci_send_cmd(&hci_read_local_extended_oob_data); 4160 } else { 4161 hci_send_cmd(&hci_read_local_oob_data); 4162 } 4163 } 4164 #endif 4165 // pairing 4166 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4167 uint8_t state = hci_stack->gap_pairing_state; 4168 uint8_t pin_code[16]; 4169 switch (state){ 4170 case GAP_PAIRING_STATE_SEND_PIN: 4171 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4172 memset(pin_code, 0, 16); 4173 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4174 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4175 break; 4176 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4177 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4178 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4179 break; 4180 case GAP_PAIRING_STATE_SEND_PASSKEY: 4181 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4182 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4183 break; 4184 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4185 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4186 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4187 break; 4188 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4189 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4190 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4191 break; 4192 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4193 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4194 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4195 break; 4196 default: 4197 break; 4198 } 4199 return true; 4200 } 4201 return false; 4202 } 4203 #endif 4204 4205 #ifdef ENABLE_BLE 4206 static bool hci_run_general_gap_le(void){ 4207 4208 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4209 4210 if (hci_stack->state != HCI_STATE_WORKING) return false; 4211 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4212 4213 4214 // Phase 1: collect what to stop 4215 4216 bool scanning_stop = false; 4217 bool connecting_stop = false; 4218 bool advertising_stop = false; 4219 4220 #ifndef ENABLE_LE_CENTRAL 4221 UNUSED(scanning_stop); 4222 UNUSED(connecting_stop); 4223 #endif 4224 #ifndef ENABLE_LE_PERIPHERAL 4225 UNUSED(advertising_stop); 4226 #endif 4227 4228 // check if whitelist needs modification 4229 bool whitelist_modification_pending = false; 4230 btstack_linked_list_iterator_t lit; 4231 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4232 while (btstack_linked_list_iterator_has_next(&lit)){ 4233 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4234 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4235 whitelist_modification_pending = true; 4236 break; 4237 } 4238 } 4239 // check if resolving list needs modification 4240 bool resolving_list_modification_pending = false; 4241 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4242 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4243 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4244 resolving_list_modification_pending = true; 4245 } 4246 #endif 4247 4248 #ifdef ENABLE_LE_CENTRAL 4249 // scanning control 4250 if (hci_stack->le_scanning_active) { 4251 // stop if: 4252 // - parameter change required 4253 // - it's disabled 4254 // - whitelist change required but used for scanning 4255 // - resolving list modified 4256 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4257 if ((hci_stack->le_scanning_param_update) || 4258 !hci_stack->le_scanning_enabled || 4259 scanning_uses_whitelist || 4260 resolving_list_modification_pending){ 4261 4262 scanning_stop = true; 4263 } 4264 } 4265 #endif 4266 4267 #ifdef ENABLE_LE_CENTRAL 4268 // connecting control 4269 bool connecting_with_whitelist; 4270 switch (hci_stack->le_connecting_state){ 4271 case LE_CONNECTING_DIRECT: 4272 case LE_CONNECTING_WHITELIST: 4273 // stop connecting if: 4274 // - connecting uses white and whitelist modification pending 4275 // - if it got disabled 4276 // - resolving list modified 4277 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4278 if ((connecting_with_whitelist && whitelist_modification_pending) || 4279 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4280 resolving_list_modification_pending) { 4281 4282 connecting_stop = true; 4283 } 4284 break; 4285 default: 4286 break; 4287 } 4288 #endif 4289 4290 #ifdef ENABLE_LE_PERIPHERAL 4291 // le advertisement control 4292 if (hci_stack->le_advertisements_active){ 4293 // stop if: 4294 // - parameter change required 4295 // - it's disabled 4296 // - whitelist change required but used for advertisement filter policy 4297 // - resolving list modified 4298 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4299 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4300 if (advertising_change || 4301 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4302 (advertising_uses_whitelist & whitelist_modification_pending) || 4303 resolving_list_modification_pending) { 4304 4305 advertising_stop = true; 4306 } 4307 } 4308 #endif 4309 4310 4311 // Phase 2: stop everything that should be off during modifications 4312 4313 #ifdef ENABLE_LE_CENTRAL 4314 if (scanning_stop){ 4315 hci_stack->le_scanning_active = false; 4316 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4317 return true; 4318 } 4319 #endif 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 if (connecting_stop){ 4323 hci_send_cmd(&hci_le_create_connection_cancel); 4324 return true; 4325 } 4326 #endif 4327 4328 #ifdef ENABLE_LE_PERIPHERAL 4329 if (advertising_stop){ 4330 hci_stack->le_advertisements_active = false; 4331 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4332 return true; 4333 } 4334 #endif 4335 4336 // Phase 3: modify 4337 4338 #ifdef ENABLE_LE_CENTRAL 4339 if (hci_stack->le_scanning_param_update){ 4340 hci_stack->le_scanning_param_update = false; 4341 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4342 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4343 return true; 4344 } 4345 #endif 4346 4347 #ifdef ENABLE_LE_PERIPHERAL 4348 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4349 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4350 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4351 hci_send_cmd(&hci_le_set_advertising_parameters, 4352 hci_stack->le_advertisements_interval_min, 4353 hci_stack->le_advertisements_interval_max, 4354 hci_stack->le_advertisements_type, 4355 hci_stack->le_advertisements_own_addr_type, 4356 hci_stack->le_advertisements_direct_address_type, 4357 hci_stack->le_advertisements_direct_address, 4358 hci_stack->le_advertisements_channel_map, 4359 hci_stack->le_advertisements_filter_policy); 4360 return true; 4361 } 4362 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4363 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4364 uint8_t adv_data_clean[31]; 4365 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4366 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4367 hci_stack->le_advertisements_data_len); 4368 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4369 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4370 return true; 4371 } 4372 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4373 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4374 uint8_t scan_data_clean[31]; 4375 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4376 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4377 hci_stack->le_scan_response_data_len); 4378 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4379 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4380 return true; 4381 } 4382 #endif 4383 4384 4385 #ifdef ENABLE_LE_CENTRAL 4386 // if connect with whitelist was active and is not cancelled yet, wait until next time 4387 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4388 #endif 4389 4390 // LE Whitelist Management 4391 if (whitelist_modification_pending){ 4392 // add/remove entries 4393 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4394 while (btstack_linked_list_iterator_has_next(&lit)){ 4395 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4396 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4397 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4398 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4399 return true; 4400 } 4401 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4402 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4403 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4404 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4405 return true; 4406 } 4407 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4408 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4409 btstack_memory_whitelist_entry_free(entry); 4410 } 4411 } 4412 } 4413 4414 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4415 // LE Resolving List Management 4416 if (resolving_list_supported) { 4417 uint16_t i; 4418 switch (hci_stack->le_resolving_list_state) { 4419 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4420 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4421 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4422 return true; 4423 case LE_RESOLVING_LIST_READ_SIZE: 4424 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4425 hci_send_cmd(&hci_le_read_resolving_list_size); 4426 return true; 4427 case LE_RESOLVING_LIST_SEND_CLEAR: 4428 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4429 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4430 sizeof(hci_stack->le_resolving_list_add_entries)); 4431 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4432 sizeof(hci_stack->le_resolving_list_remove_entries)); 4433 hci_send_cmd(&hci_le_clear_resolving_list); 4434 return true; 4435 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4436 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4437 uint8_t offset = i >> 3; 4438 uint8_t mask = 1 << (i & 7); 4439 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4440 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4441 bd_addr_t peer_identity_addreses; 4442 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4443 sm_key_t peer_irk; 4444 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4445 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4446 4447 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4448 // trigger whitelist entry 'update' (work around for controller bug) 4449 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4450 while (btstack_linked_list_iterator_has_next(&lit)) { 4451 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4452 if (entry->address_type != peer_identity_addr_type) continue; 4453 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4454 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4455 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4456 } 4457 #endif 4458 4459 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4460 peer_identity_addreses); 4461 return true; 4462 } 4463 4464 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4465 4466 /* fall through */ 4467 4468 case LE_RESOLVING_LIST_ADD_ENTRIES: 4469 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4470 uint8_t offset = i >> 3; 4471 uint8_t mask = 1 << (i & 7); 4472 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4473 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4474 bd_addr_t peer_identity_addreses; 4475 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4476 sm_key_t peer_irk; 4477 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4478 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4479 const uint8_t *local_irk = gap_get_persistent_irk(); 4480 // command uses format specifier 'P' that stores 16-byte value without flip 4481 uint8_t local_irk_flipped[16]; 4482 uint8_t peer_irk_flipped[16]; 4483 reverse_128(local_irk, local_irk_flipped); 4484 reverse_128(peer_irk, peer_irk_flipped); 4485 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4486 peer_irk_flipped, local_irk_flipped); 4487 return true; 4488 } 4489 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4490 break; 4491 4492 default: 4493 break; 4494 } 4495 } 4496 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4497 #endif 4498 4499 // Phase 4: restore state 4500 4501 #ifdef ENABLE_LE_CENTRAL 4502 // re-start scanning 4503 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4504 hci_stack->le_scanning_active = true; 4505 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4506 return true; 4507 } 4508 #endif 4509 4510 #ifdef ENABLE_LE_CENTRAL 4511 // re-start connecting 4512 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4513 bd_addr_t null_addr; 4514 memset(null_addr, 0, 6); 4515 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4516 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4517 hci_send_cmd(&hci_le_create_connection, 4518 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4519 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4520 1, // use whitelist 4521 0, // peer address type 4522 null_addr, // peer bd addr 4523 hci_stack->le_connection_own_addr_type, // our addr type: 4524 hci_stack->le_connection_interval_min, // conn interval min 4525 hci_stack->le_connection_interval_max, // conn interval max 4526 hci_stack->le_connection_latency, // conn latency 4527 hci_stack->le_supervision_timeout, // conn latency 4528 hci_stack->le_minimum_ce_length, // min ce length 4529 hci_stack->le_maximum_ce_length // max ce length 4530 ); 4531 return true; 4532 } 4533 #endif 4534 4535 #ifdef ENABLE_LE_PERIPHERAL 4536 // re-start advertising 4537 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4538 // check if advertisements should be enabled given 4539 hci_stack->le_advertisements_active = true; 4540 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4541 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4542 return true; 4543 } 4544 #endif 4545 4546 return false; 4547 } 4548 #endif 4549 4550 static bool hci_run_general_pending_commands(void){ 4551 btstack_linked_item_t * it; 4552 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4553 hci_connection_t * connection = (hci_connection_t *) it; 4554 4555 switch(connection->state){ 4556 case SEND_CREATE_CONNECTION: 4557 switch(connection->address_type){ 4558 #ifdef ENABLE_CLASSIC 4559 case BD_ADDR_TYPE_ACL: 4560 log_info("sending hci_create_connection"); 4561 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4562 break; 4563 #endif 4564 default: 4565 #ifdef ENABLE_BLE 4566 #ifdef ENABLE_LE_CENTRAL 4567 log_info("sending hci_le_create_connection"); 4568 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4569 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4570 hci_send_cmd(&hci_le_create_connection, 4571 hci_stack->le_connection_scan_interval, // conn scan interval 4572 hci_stack->le_connection_scan_window, // conn scan windows 4573 0, // don't use whitelist 4574 connection->address_type, // peer address type 4575 connection->address, // peer bd addr 4576 hci_stack->le_connection_own_addr_type, // our addr type: 4577 hci_stack->le_connection_interval_min, // conn interval min 4578 hci_stack->le_connection_interval_max, // conn interval max 4579 hci_stack->le_connection_latency, // conn latency 4580 hci_stack->le_supervision_timeout, // conn latency 4581 hci_stack->le_minimum_ce_length, // min ce length 4582 hci_stack->le_maximum_ce_length // max ce length 4583 ); 4584 connection->state = SENT_CREATE_CONNECTION; 4585 #endif 4586 #endif 4587 break; 4588 } 4589 return true; 4590 4591 #ifdef ENABLE_CLASSIC 4592 case RECEIVED_CONNECTION_REQUEST: 4593 connection->role = HCI_ROLE_SLAVE; 4594 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4595 log_info("sending hci_accept_connection_request"); 4596 connection->state = ACCEPTED_CONNECTION_REQUEST; 4597 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4598 } 4599 return true; 4600 #endif 4601 4602 #ifdef ENABLE_BLE 4603 #ifdef ENABLE_LE_CENTRAL 4604 case SEND_CANCEL_CONNECTION: 4605 connection->state = SENT_CANCEL_CONNECTION; 4606 hci_send_cmd(&hci_le_create_connection_cancel); 4607 return true; 4608 #endif 4609 #endif 4610 case SEND_DISCONNECT: 4611 connection->state = SENT_DISCONNECT; 4612 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4613 return true; 4614 4615 default: 4616 break; 4617 } 4618 4619 // no further commands if connection is about to get shut down 4620 if (connection->state == SENT_DISCONNECT) continue; 4621 4622 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4623 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4624 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4625 return true; 4626 } 4627 4628 #ifdef ENABLE_CLASSIC 4629 4630 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4631 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4632 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4633 return true; 4634 } 4635 4636 // Handling link key request requires remote supported features 4637 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4638 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4639 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4640 4641 // lookup link key using cached key first 4642 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4643 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4644 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4645 } 4646 4647 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4648 if (have_link_key && security_level_sufficient){ 4649 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4650 } else { 4651 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4652 } 4653 return true; 4654 } 4655 4656 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4657 log_info("denying to pin request"); 4658 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4659 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4660 return true; 4661 } 4662 4663 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4664 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4665 // set authentication requirements: 4666 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4667 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4668 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4669 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4670 authreq |= 1; 4671 } 4672 bool bonding = hci_stack->bondable; 4673 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4674 // if we have received IO Cap Response, we're in responder role 4675 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4676 if (bonding && !remote_bonding){ 4677 log_info("Remote not bonding, dropping local flag"); 4678 bonding = false; 4679 } 4680 } 4681 if (bonding){ 4682 if (connection->bonding_flags & BONDING_DEDICATED){ 4683 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4684 } else { 4685 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4686 } 4687 } 4688 uint8_t have_oob_data = 0; 4689 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4690 if (connection->classic_oob_c_192 != NULL){ 4691 have_oob_data |= 1; 4692 } 4693 if (connection->classic_oob_c_256 != NULL){ 4694 have_oob_data |= 2; 4695 } 4696 #endif 4697 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4698 return true; 4699 } 4700 4701 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4702 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4703 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4704 return true; 4705 } 4706 4707 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4708 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4709 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4710 const uint8_t zero[16] = { 0 }; 4711 const uint8_t * r_192 = zero; 4712 const uint8_t * c_192 = zero; 4713 const uint8_t * r_256 = zero; 4714 const uint8_t * c_256 = zero; 4715 // verify P-256 OOB 4716 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4717 c_256 = connection->classic_oob_c_256; 4718 if (connection->classic_oob_r_256 != NULL) { 4719 r_256 = connection->classic_oob_r_256; 4720 } 4721 } 4722 // verify P-192 OOB 4723 if ((connection->classic_oob_c_192 != NULL)) { 4724 c_192 = connection->classic_oob_c_192; 4725 if (connection->classic_oob_r_192 != NULL) { 4726 r_192 = connection->classic_oob_r_192; 4727 } 4728 } 4729 4730 // assess security 4731 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4732 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4733 if (need_level_4 && !can_reach_level_4){ 4734 log_info("Level 4 required, but not possible -> abort"); 4735 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4736 // send oob negative reply 4737 c_256 = NULL; 4738 c_192 = NULL; 4739 } 4740 4741 // Reply 4742 if (c_256 != zero) { 4743 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4744 } else if (c_192 != zero){ 4745 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4746 } else { 4747 hci_stack->classic_oob_con_handle = connection->con_handle; 4748 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4749 } 4750 return true; 4751 } 4752 #endif 4753 4754 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4755 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4756 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4757 return true; 4758 } 4759 4760 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4761 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4762 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4763 return true; 4764 } 4765 4766 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4767 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4768 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4769 return true; 4770 } 4771 4772 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4773 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4774 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4775 return true; 4776 } 4777 4778 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4779 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4780 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4781 return true; 4782 } 4783 4784 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4785 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4786 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4787 return true; 4788 } 4789 4790 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4791 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4792 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4793 connection->state = SENT_DISCONNECT; 4794 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4795 return true; 4796 } 4797 4798 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4799 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4800 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4801 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4802 return true; 4803 } 4804 4805 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4806 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4807 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4808 return true; 4809 } 4810 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4811 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4812 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4813 return true; 4814 } 4815 #endif 4816 4817 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4818 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4819 #ifdef ENABLE_CLASSIC 4820 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4821 #endif 4822 if (connection->state != SENT_DISCONNECT){ 4823 connection->state = SENT_DISCONNECT; 4824 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4825 return true; 4826 } 4827 } 4828 4829 #ifdef ENABLE_CLASSIC 4830 uint16_t sniff_min_interval; 4831 switch (connection->sniff_min_interval){ 4832 case 0: 4833 break; 4834 case 0xffff: 4835 connection->sniff_min_interval = 0; 4836 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4837 return true; 4838 default: 4839 sniff_min_interval = connection->sniff_min_interval; 4840 connection->sniff_min_interval = 0; 4841 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4842 return true; 4843 } 4844 4845 if (connection->sniff_subrating_max_latency != 0xffff){ 4846 uint16_t max_latency = connection->sniff_subrating_max_latency; 4847 connection->sniff_subrating_max_latency = 0; 4848 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4849 return true; 4850 } 4851 4852 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4853 uint8_t service_type = (uint8_t) connection->qos_service_type; 4854 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4855 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); 4856 return true; 4857 } 4858 4859 if (connection->request_role != HCI_ROLE_INVALID){ 4860 hci_role_t role = connection->request_role; 4861 connection->request_role = HCI_ROLE_INVALID; 4862 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4863 return true; 4864 } 4865 #endif 4866 4867 #ifdef ENABLE_BLE 4868 switch (connection->le_con_parameter_update_state){ 4869 // response to L2CAP CON PARAMETER UPDATE REQUEST 4870 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4871 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4872 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4873 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4874 0x0000, 0xffff); 4875 return true; 4876 case CON_PARAMETER_UPDATE_REPLY: 4877 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4878 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4879 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4880 0x0000, 0xffff); 4881 return true; 4882 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4883 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4884 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4885 return true; 4886 default: 4887 break; 4888 } 4889 if (connection->le_phy_update_all_phys != 0xffu){ 4890 uint8_t all_phys = connection->le_phy_update_all_phys; 4891 connection->le_phy_update_all_phys = 0xff; 4892 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); 4893 return true; 4894 } 4895 #endif 4896 } 4897 return false; 4898 } 4899 4900 static void hci_run(void){ 4901 4902 bool done; 4903 4904 // send continuation fragments first, as they block the prepared packet buffer 4905 done = hci_run_acl_fragments(); 4906 if (done) return; 4907 4908 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4909 // send host num completed packets next as they don't require num_cmd_packets > 0 4910 if (!hci_can_send_comand_packet_transport()) return; 4911 if (hci_stack->host_completed_packets){ 4912 hci_host_num_completed_packets(); 4913 return; 4914 } 4915 #endif 4916 4917 if (!hci_can_send_command_packet_now()) return; 4918 4919 // global/non-connection oriented commands 4920 4921 4922 #ifdef ENABLE_CLASSIC 4923 // general gap classic 4924 done = hci_run_general_gap_classic(); 4925 if (done) return; 4926 #endif 4927 4928 #ifdef ENABLE_BLE 4929 // general gap le 4930 done = hci_run_general_gap_le(); 4931 if (done) return; 4932 #endif 4933 4934 // send pending HCI commands 4935 done = hci_run_general_pending_commands(); 4936 if (done) return; 4937 4938 // stack state sub statemachines 4939 hci_connection_t * connection; 4940 switch (hci_stack->state){ 4941 case HCI_STATE_INITIALIZING: 4942 hci_initializing_run(); 4943 break; 4944 4945 case HCI_STATE_HALTING: 4946 4947 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4948 switch (hci_stack->substate){ 4949 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4950 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4951 4952 #ifdef ENABLE_BLE 4953 #ifdef ENABLE_LE_CENTRAL 4954 // free whitelist entries 4955 { 4956 btstack_linked_list_iterator_t lit; 4957 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4958 while (btstack_linked_list_iterator_has_next(&lit)){ 4959 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4960 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4961 btstack_memory_whitelist_entry_free(entry); 4962 } 4963 } 4964 #endif 4965 #endif 4966 // close all open connections 4967 connection = (hci_connection_t *) hci_stack->connections; 4968 if (connection){ 4969 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4970 if (!hci_can_send_command_packet_now()) return; 4971 4972 // check state 4973 if (connection->state == SENT_DISCONNECT) return; 4974 connection->state = SENT_DISCONNECT; 4975 4976 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4977 4978 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4979 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4980 4981 // ... which would be ignored anyway as we shutdown (free) the connection now 4982 hci_shutdown_connection(connection); 4983 4984 // finally, send the disconnect command 4985 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4986 return; 4987 } 4988 4989 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4990 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4991 log_info("HCI_STATE_HALTING: wait 50 ms"); 4992 hci_stack->substate = HCI_HALTING_W4_TIMER; 4993 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4994 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4995 btstack_run_loop_add_timer(&hci_stack->timeout); 4996 break; 4997 } 4998 4999 /* fall through */ 5000 5001 case HCI_HALTING_CLOSE: 5002 log_info("HCI_STATE_HALTING, calling off"); 5003 5004 // switch mode 5005 hci_power_control_off(); 5006 5007 log_info("HCI_STATE_HALTING, emitting state"); 5008 hci_emit_state(); 5009 log_info("HCI_STATE_HALTING, done"); 5010 break; 5011 5012 case HCI_HALTING_W4_TIMER: 5013 // keep waiting 5014 5015 break; 5016 default: 5017 break; 5018 } 5019 5020 break; 5021 5022 case HCI_STATE_FALLING_ASLEEP: 5023 switch(hci_stack->substate) { 5024 case HCI_FALLING_ASLEEP_DISCONNECT: 5025 log_info("HCI_STATE_FALLING_ASLEEP"); 5026 // close all open connections 5027 connection = (hci_connection_t *) hci_stack->connections; 5028 5029 #ifdef HAVE_PLATFORM_IPHONE_OS 5030 // don't close connections, if H4 supports power management 5031 if (btstack_control_iphone_power_management_enabled()){ 5032 connection = NULL; 5033 } 5034 #endif 5035 if (connection){ 5036 5037 // send disconnect 5038 if (!hci_can_send_command_packet_now()) return; 5039 5040 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5041 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5042 5043 // send disconnected event right away - causes higher layer connections to get closed, too. 5044 hci_shutdown_connection(connection); 5045 return; 5046 } 5047 5048 if (hci_classic_supported()){ 5049 // disable page and inquiry scan 5050 if (!hci_can_send_command_packet_now()) return; 5051 5052 log_info("HCI_STATE_HALTING, disabling inq scans"); 5053 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5054 5055 // continue in next sub state 5056 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5057 break; 5058 } 5059 5060 /* fall through */ 5061 5062 case HCI_FALLING_ASLEEP_COMPLETE: 5063 log_info("HCI_STATE_HALTING, calling sleep"); 5064 #ifdef HAVE_PLATFORM_IPHONE_OS 5065 // don't actually go to sleep, if H4 supports power management 5066 if (btstack_control_iphone_power_management_enabled()){ 5067 // SLEEP MODE reached 5068 hci_stack->state = HCI_STATE_SLEEPING; 5069 hci_emit_state(); 5070 break; 5071 } 5072 #endif 5073 // switch mode 5074 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5075 hci_emit_state(); 5076 break; 5077 5078 default: 5079 break; 5080 } 5081 break; 5082 5083 default: 5084 break; 5085 } 5086 } 5087 5088 int hci_send_cmd_packet(uint8_t *packet, int size){ 5089 // house-keeping 5090 5091 #ifdef ENABLE_CLASSIC 5092 bd_addr_t addr; 5093 hci_connection_t * conn; 5094 #endif 5095 #ifdef ENABLE_LE_CENTRAL 5096 uint8_t initiator_filter_policy; 5097 #endif 5098 5099 uint16_t opcode = little_endian_read_16(packet, 0); 5100 switch (opcode) { 5101 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5102 hci_stack->loopback_mode = packet[3]; 5103 break; 5104 5105 #ifdef ENABLE_CLASSIC 5106 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5107 reverse_bd_addr(&packet[3], addr); 5108 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5109 5110 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5111 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5112 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5113 return -1; 5114 } 5115 5116 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5117 if (!conn) { 5118 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5119 if (!conn) { 5120 // notify client that alloc failed 5121 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5122 return -1; // packet not sent to controller 5123 } 5124 conn->state = SEND_CREATE_CONNECTION; 5125 conn->role = HCI_ROLE_MASTER; 5126 } 5127 log_info("conn state %u", conn->state); 5128 switch (conn->state) { 5129 // if connection active exists 5130 case OPEN: 5131 // and OPEN, emit connection complete command 5132 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5133 return -1; // packet not sent to controller 5134 case RECEIVED_DISCONNECTION_COMPLETE: 5135 // create connection triggered in disconnect complete event, let's do it now 5136 break; 5137 case SEND_CREATE_CONNECTION: 5138 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5139 break; 5140 default: 5141 // otherwise, just ignore as it is already in the open process 5142 return -1; // packet not sent to controller 5143 } 5144 conn->state = SENT_CREATE_CONNECTION; 5145 5146 // track outgoing connection 5147 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5148 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5149 break; 5150 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5151 if (hci_stack->link_key_db) { 5152 reverse_bd_addr(&packet[3], addr); 5153 hci_stack->link_key_db->delete_link_key(addr); 5154 } 5155 break; 5156 5157 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5158 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5159 // setup_synchronous_connection? Voice setting at offset 22 5160 // TODO: compare to current setting if sco connection already active 5161 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5162 break; 5163 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5164 // accept_synchronus_connection? Voice setting at offset 18 5165 // TODO: compare to current setting if sco connection already active 5166 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5167 break; 5168 #endif 5169 #endif 5170 5171 #ifdef ENABLE_BLE 5172 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5173 hci_stack->le_random_address_set = 1; 5174 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5175 break; 5176 #ifdef ENABLE_LE_PERIPHERAL 5177 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5178 hci_stack->le_advertisements_active = packet[3] != 0; 5179 break; 5180 #endif 5181 #ifdef ENABLE_LE_CENTRAL 5182 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5183 // white list used? 5184 initiator_filter_policy = packet[7]; 5185 switch (initiator_filter_policy) { 5186 case 0: 5187 // whitelist not used 5188 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5189 break; 5190 case 1: 5191 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5192 break; 5193 default: 5194 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5195 break; 5196 } 5197 // track outgoing connection 5198 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5199 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5200 break; 5201 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5202 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5203 break; 5204 #endif 5205 #endif 5206 default: 5207 break; 5208 } 5209 5210 hci_stack->num_cmd_packets--; 5211 5212 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5213 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5214 } 5215 5216 // disconnect because of security block 5217 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5218 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5219 if (!connection) return; 5220 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5221 } 5222 5223 5224 // Configure Secure Simple Pairing 5225 5226 #ifdef ENABLE_CLASSIC 5227 5228 // enable will enable SSP during init 5229 void gap_ssp_set_enable(int enable){ 5230 hci_stack->ssp_enable = enable; 5231 } 5232 5233 static int hci_local_ssp_activated(void){ 5234 return gap_ssp_supported() && hci_stack->ssp_enable; 5235 } 5236 5237 // if set, BTstack will respond to io capability request using authentication requirement 5238 void gap_ssp_set_io_capability(int io_capability){ 5239 hci_stack->ssp_io_capability = io_capability; 5240 } 5241 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5242 hci_stack->ssp_authentication_requirement = authentication_requirement; 5243 } 5244 5245 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5246 void gap_ssp_set_auto_accept(int auto_accept){ 5247 hci_stack->ssp_auto_accept = auto_accept; 5248 } 5249 5250 void gap_secure_connections_enable(bool enable){ 5251 hci_stack->secure_connections_enable = enable; 5252 } 5253 5254 #endif 5255 5256 // va_list part of hci_send_cmd 5257 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5258 if (!hci_can_send_command_packet_now()){ 5259 log_error("hci_send_cmd called but cannot send packet now"); 5260 return 0; 5261 } 5262 5263 // for HCI INITIALIZATION 5264 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5265 hci_stack->last_cmd_opcode = cmd->opcode; 5266 5267 hci_reserve_packet_buffer(); 5268 uint8_t * packet = hci_stack->hci_packet_buffer; 5269 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5270 int err = hci_send_cmd_packet(packet, size); 5271 5272 // release packet buffer on error or for synchronous transport implementations 5273 if ((err < 0) || hci_transport_synchronous()){ 5274 hci_release_packet_buffer(); 5275 hci_emit_transport_packet_sent(); 5276 } 5277 5278 return err; 5279 } 5280 5281 /** 5282 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5283 */ 5284 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5285 va_list argptr; 5286 va_start(argptr, cmd); 5287 int res = hci_send_cmd_va_arg(cmd, argptr); 5288 va_end(argptr); 5289 return res; 5290 } 5291 5292 // Create various non-HCI events. 5293 // TODO: generalize, use table similar to hci_create_command 5294 5295 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5296 // dump packet 5297 if (dump) { 5298 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5299 } 5300 5301 // dispatch to all event handlers 5302 btstack_linked_list_iterator_t it; 5303 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5304 while (btstack_linked_list_iterator_has_next(&it)){ 5305 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5306 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5307 } 5308 } 5309 5310 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5311 if (!hci_stack->acl_packet_handler) return; 5312 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5313 } 5314 5315 #ifdef ENABLE_CLASSIC 5316 static void hci_notify_if_sco_can_send_now(void){ 5317 // notify SCO sender if waiting 5318 if (!hci_stack->sco_waiting_for_can_send_now) return; 5319 if (hci_can_send_sco_packet_now()){ 5320 hci_stack->sco_waiting_for_can_send_now = 0; 5321 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5322 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5323 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5324 } 5325 } 5326 5327 // parsing end emitting has been merged to reduce code size 5328 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5329 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5330 5331 uint8_t * eir_data; 5332 ad_context_t context; 5333 const uint8_t * name; 5334 uint8_t name_len; 5335 5336 if (size < 3) return; 5337 5338 int event_type = hci_event_packet_get_type(packet); 5339 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5340 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5341 5342 switch (event_type){ 5343 case HCI_EVENT_INQUIRY_RESULT: 5344 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5345 if (size != (3 + (num_responses * 14))) return; 5346 break; 5347 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5348 if (size != 257) return; 5349 if (num_responses != 1) return; 5350 break; 5351 default: 5352 return; 5353 } 5354 5355 // event[1] is set at the end 5356 int i; 5357 for (i=0; i<num_responses;i++){ 5358 memset(event, 0, sizeof(event)); 5359 event[0] = GAP_EVENT_INQUIRY_RESULT; 5360 uint8_t event_size = 27; // if name is not set by EIR 5361 5362 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5363 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5364 (void)memcpy(&event[9], 5365 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5366 3); // class of device 5367 (void)memcpy(&event[12], 5368 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5369 2); // clock offset 5370 5371 switch (event_type){ 5372 case HCI_EVENT_INQUIRY_RESULT: 5373 // 14,15,16,17 = 0, size 18 5374 break; 5375 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5376 event[14] = 1; 5377 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5378 // 16,17 = 0, size 18 5379 break; 5380 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5381 event[14] = 1; 5382 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5383 // EIR packets only contain a single inquiry response 5384 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5385 name = NULL; 5386 // Iterate over EIR data 5387 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5388 uint8_t data_type = ad_iterator_get_data_type(&context); 5389 uint8_t data_size = ad_iterator_get_data_len(&context); 5390 const uint8_t * data = ad_iterator_get_data(&context); 5391 // Prefer Complete Local Name over Shortened Local Name 5392 switch (data_type){ 5393 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5394 if (name) continue; 5395 /* fall through */ 5396 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5397 name = data; 5398 name_len = data_size; 5399 break; 5400 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5401 if (data_size != 8) break; 5402 event[16] = 1; 5403 memcpy(&event[17], data, 8); 5404 break; 5405 default: 5406 break; 5407 } 5408 } 5409 if (name){ 5410 event[25] = 1; 5411 // truncate name if needed 5412 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5413 event[26] = len; 5414 (void)memcpy(&event[27], name, len); 5415 event_size += len; 5416 } 5417 break; 5418 default: 5419 return; 5420 } 5421 event[1] = event_size - 2; 5422 hci_emit_event(event, event_size, 1); 5423 } 5424 } 5425 #endif 5426 5427 void hci_emit_state(void){ 5428 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5429 uint8_t event[3]; 5430 event[0] = BTSTACK_EVENT_STATE; 5431 event[1] = sizeof(event) - 2u; 5432 event[2] = hci_stack->state; 5433 hci_emit_event(event, sizeof(event), 1); 5434 } 5435 5436 #ifdef ENABLE_CLASSIC 5437 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5438 uint8_t event[13]; 5439 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5440 event[1] = sizeof(event) - 2; 5441 event[2] = status; 5442 little_endian_store_16(event, 3, con_handle); 5443 reverse_bd_addr(address, &event[5]); 5444 event[11] = 1; // ACL connection 5445 event[12] = 0; // encryption disabled 5446 hci_emit_event(event, sizeof(event), 1); 5447 } 5448 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5449 if (disable_l2cap_timeouts) return; 5450 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5451 uint8_t event[4]; 5452 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5453 event[1] = sizeof(event) - 2; 5454 little_endian_store_16(event, 2, conn->con_handle); 5455 hci_emit_event(event, sizeof(event), 1); 5456 } 5457 #endif 5458 5459 #ifdef ENABLE_BLE 5460 #ifdef ENABLE_LE_CENTRAL 5461 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){ 5462 uint8_t event[21]; 5463 event[0] = HCI_EVENT_LE_META; 5464 event[1] = sizeof(event) - 2u; 5465 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5466 event[3] = status; 5467 little_endian_store_16(event, 4, con_handle); 5468 event[6] = 0; // TODO: role 5469 event[7] = address_type; 5470 reverse_bd_addr(address, &event[8]); 5471 little_endian_store_16(event, 14, 0); // interval 5472 little_endian_store_16(event, 16, 0); // latency 5473 little_endian_store_16(event, 18, 0); // supervision timeout 5474 event[20] = 0; // master clock accuracy 5475 hci_emit_event(event, sizeof(event), 1); 5476 } 5477 #endif 5478 #endif 5479 5480 static void hci_emit_transport_packet_sent(void){ 5481 // notify upper stack that it might be possible to send again 5482 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5483 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5484 } 5485 5486 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5487 uint8_t event[6]; 5488 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5489 event[1] = sizeof(event) - 2u; 5490 event[2] = 0; // status = OK 5491 little_endian_store_16(event, 3, con_handle); 5492 event[5] = reason; 5493 hci_emit_event(event, sizeof(event), 1); 5494 } 5495 5496 static void hci_emit_nr_connections_changed(void){ 5497 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5498 uint8_t event[3]; 5499 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5500 event[1] = sizeof(event) - 2u; 5501 event[2] = nr_hci_connections(); 5502 hci_emit_event(event, sizeof(event), 1); 5503 } 5504 5505 static void hci_emit_hci_open_failed(void){ 5506 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5507 uint8_t event[2]; 5508 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5509 event[1] = sizeof(event) - 2u; 5510 hci_emit_event(event, sizeof(event), 1); 5511 } 5512 5513 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5514 log_info("hci_emit_dedicated_bonding_result %u ", status); 5515 uint8_t event[9]; 5516 int pos = 0; 5517 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5518 event[pos++] = sizeof(event) - 2u; 5519 event[pos++] = status; 5520 reverse_bd_addr(address, &event[pos]); 5521 hci_emit_event(event, sizeof(event), 1); 5522 } 5523 5524 5525 #ifdef ENABLE_CLASSIC 5526 5527 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5528 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5529 uint8_t event[5]; 5530 int pos = 0; 5531 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5532 event[pos++] = sizeof(event) - 2; 5533 little_endian_store_16(event, 2, con_handle); 5534 pos += 2; 5535 event[pos++] = level; 5536 hci_emit_event(event, sizeof(event), 1); 5537 } 5538 5539 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5540 if (!connection) return LEVEL_0; 5541 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5542 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5543 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5544 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5545 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5546 // LEVEL 4 always requires 128 bit encrytion key size 5547 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5548 security_level = LEVEL_3; 5549 } 5550 return security_level; 5551 } 5552 5553 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5554 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5555 uint8_t event[3]; 5556 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5557 event[1] = sizeof(event) - 2; 5558 event[2] = enabled; 5559 hci_emit_event(event, sizeof(event), 1); 5560 } 5561 5562 // query if remote side supports eSCO 5563 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5564 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5565 if (!connection) return 0; 5566 return (connection->remote_supported_features[0] & 1) != 0; 5567 } 5568 5569 static bool hci_ssp_supported(hci_connection_t * connection){ 5570 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5571 return (connection->bonding_flags & mask) == mask; 5572 } 5573 5574 // query if remote side supports SSP 5575 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5576 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5577 if (!connection) return 0; 5578 return hci_ssp_supported(connection) ? 1 : 0; 5579 } 5580 5581 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5582 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5583 } 5584 5585 // GAP API 5586 /** 5587 * @bbrief enable/disable bonding. default is enabled 5588 * @praram enabled 5589 */ 5590 void gap_set_bondable_mode(int enable){ 5591 hci_stack->bondable = enable ? 1 : 0; 5592 } 5593 /** 5594 * @brief Get bondable mode. 5595 * @return 1 if bondable 5596 */ 5597 int gap_get_bondable_mode(void){ 5598 return hci_stack->bondable; 5599 } 5600 5601 /** 5602 * @brief map link keys to security levels 5603 */ 5604 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5605 switch (link_key_type){ 5606 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5607 return LEVEL_4; 5608 case COMBINATION_KEY: 5609 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5610 return LEVEL_3; 5611 default: 5612 return LEVEL_2; 5613 } 5614 } 5615 5616 /** 5617 * @brief map link keys to secure connection yes/no 5618 */ 5619 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5620 switch (link_key_type){ 5621 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5622 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5623 return 1; 5624 default: 5625 return 0; 5626 } 5627 } 5628 5629 /** 5630 * @brief map link keys to authenticated 5631 */ 5632 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5633 switch (link_key_type){ 5634 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5635 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5636 return 1; 5637 default: 5638 return 0; 5639 } 5640 } 5641 5642 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5643 log_info("gap_mitm_protection_required_for_security_level %u", level); 5644 return level > LEVEL_2; 5645 } 5646 5647 /** 5648 * @brief get current security level 5649 */ 5650 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5651 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5652 if (!connection) return LEVEL_0; 5653 return gap_security_level_for_connection(connection); 5654 } 5655 5656 /** 5657 * @brief request connection to device to 5658 * @result GAP_AUTHENTICATION_RESULT 5659 */ 5660 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5661 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5662 if (!connection){ 5663 hci_emit_security_level(con_handle, LEVEL_0); 5664 return; 5665 } 5666 5667 btstack_assert(hci_is_le_connection(connection) == false); 5668 5669 // 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) 5670 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5671 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5672 requested_level = LEVEL_4; 5673 } 5674 5675 gap_security_level_t current_level = gap_security_level(con_handle); 5676 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5677 requested_level, connection->requested_security_level, current_level); 5678 5679 // authentication active if authentication request was sent or planned level > 0 5680 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5681 if (authentication_active){ 5682 // authentication already active 5683 if (connection->requested_security_level < requested_level){ 5684 // increase requested level as new level is higher 5685 // TODO: handle re-authentication when done 5686 connection->requested_security_level = requested_level; 5687 } 5688 } else { 5689 // no request active, notify if security sufficient 5690 if (requested_level <= current_level){ 5691 hci_emit_security_level(con_handle, current_level); 5692 return; 5693 } 5694 5695 // store request 5696 connection->requested_security_level = requested_level; 5697 5698 // start to authenticate connection 5699 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5700 hci_run(); 5701 } 5702 } 5703 5704 /** 5705 * @brief start dedicated bonding with device. disconnect after bonding 5706 * @param device 5707 * @param request MITM protection 5708 * @result GAP_DEDICATED_BONDING_COMPLETE 5709 */ 5710 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5711 5712 // create connection state machine 5713 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5714 5715 if (!connection){ 5716 return BTSTACK_MEMORY_ALLOC_FAILED; 5717 } 5718 5719 // delete linkn key 5720 gap_drop_link_key_for_bd_addr(device); 5721 5722 // configure LEVEL_2/3, dedicated bonding 5723 connection->state = SEND_CREATE_CONNECTION; 5724 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5725 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5726 connection->bonding_flags = BONDING_DEDICATED; 5727 5728 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5729 5730 // handle: connnection failure (connection complete != ok) 5731 // handle: authentication failure 5732 // handle: disconnect on done 5733 5734 hci_run(); 5735 5736 return 0; 5737 } 5738 #endif 5739 5740 void gap_set_local_name(const char * local_name){ 5741 hci_stack->local_name = local_name; 5742 } 5743 5744 5745 #ifdef ENABLE_BLE 5746 5747 #ifdef ENABLE_LE_CENTRAL 5748 void gap_start_scan(void){ 5749 hci_stack->le_scanning_enabled = true; 5750 hci_run(); 5751 } 5752 5753 void gap_stop_scan(void){ 5754 hci_stack->le_scanning_enabled = false; 5755 hci_run(); 5756 } 5757 5758 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5759 hci_stack->le_scan_type = scan_type; 5760 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5761 hci_stack->le_scan_interval = scan_interval; 5762 hci_stack->le_scan_window = scan_window; 5763 hci_stack->le_scanning_param_update = true; 5764 hci_run(); 5765 } 5766 5767 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5768 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5769 } 5770 5771 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5772 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5773 if (!conn){ 5774 // disallow if le connection is already outgoing 5775 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5776 log_error("le connection already active"); 5777 return ERROR_CODE_COMMAND_DISALLOWED; 5778 } 5779 5780 log_info("gap_connect: no connection exists yet, creating context"); 5781 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5782 if (!conn){ 5783 // notify client that alloc failed 5784 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5785 log_info("gap_connect: failed to alloc hci_connection_t"); 5786 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5787 } 5788 5789 // set le connecting state 5790 if (hci_is_le_connection_type(addr_type)){ 5791 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5792 } 5793 5794 conn->state = SEND_CREATE_CONNECTION; 5795 log_info("gap_connect: send create connection next"); 5796 hci_run(); 5797 return ERROR_CODE_SUCCESS; 5798 } 5799 5800 if (!hci_is_le_connection(conn) || 5801 (conn->state == SEND_CREATE_CONNECTION) || 5802 (conn->state == SENT_CREATE_CONNECTION)) { 5803 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5804 log_error("gap_connect: classic connection or connect is already being created"); 5805 return GATT_CLIENT_IN_WRONG_STATE; 5806 } 5807 5808 // check if connection was just disconnected 5809 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5810 log_info("gap_connect: send create connection (again)"); 5811 conn->state = SEND_CREATE_CONNECTION; 5812 hci_run(); 5813 return ERROR_CODE_SUCCESS; 5814 } 5815 5816 log_info("gap_connect: context exists with state %u", conn->state); 5817 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5818 hci_run(); 5819 return ERROR_CODE_SUCCESS; 5820 } 5821 5822 // @assumption: only a single outgoing LE Connection exists 5823 static hci_connection_t * gap_get_outgoing_connection(void){ 5824 btstack_linked_item_t *it; 5825 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5826 hci_connection_t * conn = (hci_connection_t *) it; 5827 if (!hci_is_le_connection(conn)) continue; 5828 switch (conn->state){ 5829 case SEND_CREATE_CONNECTION: 5830 case SENT_CREATE_CONNECTION: 5831 case SENT_CANCEL_CONNECTION: 5832 return conn; 5833 default: 5834 break; 5835 }; 5836 } 5837 return NULL; 5838 } 5839 5840 uint8_t gap_connect_cancel(void){ 5841 hci_connection_t * conn = gap_get_outgoing_connection(); 5842 if (!conn) return 0; 5843 switch (conn->state){ 5844 case SEND_CREATE_CONNECTION: 5845 // skip sending create connection and emit event instead 5846 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5847 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5848 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5849 btstack_memory_hci_connection_free( conn ); 5850 break; 5851 case SENT_CREATE_CONNECTION: 5852 // request to send cancel connection 5853 conn->state = SEND_CANCEL_CONNECTION; 5854 hci_run(); 5855 break; 5856 default: 5857 break; 5858 } 5859 return 0; 5860 } 5861 #endif 5862 5863 #ifdef ENABLE_LE_CENTRAL 5864 /** 5865 * @brief Set connection parameters for outgoing connections 5866 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5867 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5868 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5869 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5870 * @param conn_latency, default: 4 5871 * @param supervision_timeout (unit: 10ms), default: 720 ms 5872 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5873 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5874 */ 5875 5876 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5877 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5878 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5879 hci_stack->le_connection_scan_interval = conn_scan_interval; 5880 hci_stack->le_connection_scan_window = conn_scan_window; 5881 hci_stack->le_connection_interval_min = conn_interval_min; 5882 hci_stack->le_connection_interval_max = conn_interval_max; 5883 hci_stack->le_connection_latency = conn_latency; 5884 hci_stack->le_supervision_timeout = supervision_timeout; 5885 hci_stack->le_minimum_ce_length = min_ce_length; 5886 hci_stack->le_maximum_ce_length = max_ce_length; 5887 } 5888 #endif 5889 5890 /** 5891 * @brief Updates the connection parameters for a given LE connection 5892 * @param handle 5893 * @param conn_interval_min (unit: 1.25ms) 5894 * @param conn_interval_max (unit: 1.25ms) 5895 * @param conn_latency 5896 * @param supervision_timeout (unit: 10ms) 5897 * @returns 0 if ok 5898 */ 5899 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5900 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5901 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5902 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5903 connection->le_conn_interval_min = conn_interval_min; 5904 connection->le_conn_interval_max = conn_interval_max; 5905 connection->le_conn_latency = conn_latency; 5906 connection->le_supervision_timeout = supervision_timeout; 5907 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5908 hci_run(); 5909 return 0; 5910 } 5911 5912 /** 5913 * @brief Request an update of the connection parameter for a given LE connection 5914 * @param handle 5915 * @param conn_interval_min (unit: 1.25ms) 5916 * @param conn_interval_max (unit: 1.25ms) 5917 * @param conn_latency 5918 * @param supervision_timeout (unit: 10ms) 5919 * @returns 0 if ok 5920 */ 5921 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5922 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5923 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5924 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5925 connection->le_conn_interval_min = conn_interval_min; 5926 connection->le_conn_interval_max = conn_interval_max; 5927 connection->le_conn_latency = conn_latency; 5928 connection->le_supervision_timeout = supervision_timeout; 5929 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5930 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5931 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5932 return 0; 5933 } 5934 5935 #ifdef ENABLE_LE_PERIPHERAL 5936 5937 /** 5938 * @brief Set Advertisement Data 5939 * @param advertising_data_length 5940 * @param advertising_data (max 31 octets) 5941 * @note data is not copied, pointer has to stay valid 5942 */ 5943 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5944 hci_stack->le_advertisements_data_len = advertising_data_length; 5945 hci_stack->le_advertisements_data = advertising_data; 5946 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5947 hci_run(); 5948 } 5949 5950 /** 5951 * @brief Set Scan Response Data 5952 * @param advertising_data_length 5953 * @param advertising_data (max 31 octets) 5954 * @note data is not copied, pointer has to stay valid 5955 */ 5956 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5957 hci_stack->le_scan_response_data_len = scan_response_data_length; 5958 hci_stack->le_scan_response_data = scan_response_data; 5959 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5960 hci_run(); 5961 } 5962 5963 /** 5964 * @brief Set Advertisement Parameters 5965 * @param adv_int_min 5966 * @param adv_int_max 5967 * @param adv_type 5968 * @param direct_address_type 5969 * @param direct_address 5970 * @param channel_map 5971 * @param filter_policy 5972 * 5973 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5974 */ 5975 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5976 uint8_t direct_address_typ, bd_addr_t direct_address, 5977 uint8_t channel_map, uint8_t filter_policy) { 5978 5979 hci_stack->le_advertisements_interval_min = adv_int_min; 5980 hci_stack->le_advertisements_interval_max = adv_int_max; 5981 hci_stack->le_advertisements_type = adv_type; 5982 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5983 hci_stack->le_advertisements_channel_map = channel_map; 5984 hci_stack->le_advertisements_filter_policy = filter_policy; 5985 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5986 6); 5987 5988 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5989 hci_run(); 5990 } 5991 5992 /** 5993 * @brief Enable/Disable Advertisements 5994 * @param enabled 5995 */ 5996 void gap_advertisements_enable(int enabled){ 5997 hci_stack->le_advertisements_enabled = enabled != 0; 5998 hci_update_advertisements_enabled_for_current_roles(); 5999 hci_run(); 6000 } 6001 6002 #endif 6003 6004 void hci_le_set_own_address_type(uint8_t own_address_type){ 6005 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6006 if (own_address_type == hci_stack->le_own_addr_type) return; 6007 hci_stack->le_own_addr_type = own_address_type; 6008 6009 #ifdef ENABLE_LE_PERIPHERAL 6010 // update advertisement parameters, too 6011 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6012 hci_run(); 6013 #endif 6014 #ifdef ENABLE_LE_CENTRAL 6015 // note: we don't update scan parameters or modify ongoing connection attempts 6016 #endif 6017 } 6018 6019 #endif 6020 6021 uint8_t gap_disconnect(hci_con_handle_t handle){ 6022 hci_connection_t * conn = hci_connection_for_handle(handle); 6023 if (!conn){ 6024 hci_emit_disconnection_complete(handle, 0); 6025 return 0; 6026 } 6027 // ignore if already disconnected 6028 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6029 return 0; 6030 } 6031 conn->state = SEND_DISCONNECT; 6032 hci_run(); 6033 return 0; 6034 } 6035 6036 int gap_read_rssi(hci_con_handle_t con_handle){ 6037 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6038 if (hci_connection == NULL) return 0; 6039 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6040 hci_run(); 6041 return 1; 6042 } 6043 6044 /** 6045 * @brief Get connection type 6046 * @param con_handle 6047 * @result connection_type 6048 */ 6049 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6050 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6051 if (!conn) return GAP_CONNECTION_INVALID; 6052 switch (conn->address_type){ 6053 case BD_ADDR_TYPE_LE_PUBLIC: 6054 case BD_ADDR_TYPE_LE_RANDOM: 6055 return GAP_CONNECTION_LE; 6056 case BD_ADDR_TYPE_SCO: 6057 return GAP_CONNECTION_SCO; 6058 case BD_ADDR_TYPE_ACL: 6059 return GAP_CONNECTION_ACL; 6060 default: 6061 return GAP_CONNECTION_INVALID; 6062 } 6063 } 6064 6065 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6066 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6067 if (!conn) return HCI_ROLE_INVALID; 6068 return (hci_role_t) conn->role; 6069 } 6070 6071 6072 #ifdef ENABLE_CLASSIC 6073 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6074 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6075 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6076 conn->request_role = role; 6077 hci_run(); 6078 return ERROR_CODE_SUCCESS; 6079 } 6080 #endif 6081 6082 #ifdef ENABLE_BLE 6083 6084 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){ 6085 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6086 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6087 6088 conn->le_phy_update_all_phys = all_phys; 6089 conn->le_phy_update_tx_phys = tx_phys; 6090 conn->le_phy_update_rx_phys = rx_phys; 6091 conn->le_phy_update_phy_options = phy_options; 6092 6093 hci_run(); 6094 6095 return 0; 6096 } 6097 6098 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6099 // check if already in list 6100 btstack_linked_list_iterator_t it; 6101 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6102 while (btstack_linked_list_iterator_has_next(&it)) { 6103 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6104 if (entry->address_type != address_type) { 6105 continue; 6106 } 6107 if (memcmp(entry->address, address, 6) != 0) { 6108 continue; 6109 } 6110 // disallow if already scheduled to add 6111 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6112 return ERROR_CODE_COMMAND_DISALLOWED; 6113 } 6114 // still on controller, but scheduled to remove -> re-add 6115 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6116 return ERROR_CODE_SUCCESS; 6117 } 6118 // alloc and add to list 6119 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6120 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6121 entry->address_type = address_type; 6122 (void)memcpy(entry->address, address, 6); 6123 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6124 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6125 return ERROR_CODE_SUCCESS; 6126 } 6127 6128 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6129 btstack_linked_list_iterator_t it; 6130 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6131 while (btstack_linked_list_iterator_has_next(&it)){ 6132 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6133 if (entry->address_type != address_type) { 6134 continue; 6135 } 6136 if (memcmp(entry->address, address, 6) != 0) { 6137 continue; 6138 } 6139 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6140 // remove from controller if already present 6141 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6142 } else { 6143 // directly remove entry from whitelist 6144 btstack_linked_list_iterator_remove(&it); 6145 btstack_memory_whitelist_entry_free(entry); 6146 } 6147 return ERROR_CODE_SUCCESS; 6148 } 6149 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6150 } 6151 6152 static void hci_whitelist_clear(void){ 6153 btstack_linked_list_iterator_t it; 6154 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6155 while (btstack_linked_list_iterator_has_next(&it)){ 6156 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6157 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6158 // remove from controller if already present 6159 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6160 continue; 6161 } 6162 // directly remove entry from whitelist 6163 btstack_linked_list_iterator_remove(&it); 6164 btstack_memory_whitelist_entry_free(entry); 6165 } 6166 } 6167 6168 /** 6169 * @brief Clear Whitelist 6170 * @returns 0 if ok 6171 */ 6172 uint8_t gap_whitelist_clear(void){ 6173 hci_whitelist_clear(); 6174 hci_run(); 6175 return ERROR_CODE_SUCCESS; 6176 } 6177 6178 /** 6179 * @brief Add Device to Whitelist 6180 * @param address_typ 6181 * @param address 6182 * @returns 0 if ok 6183 */ 6184 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6185 uint8_t status = hci_whitelist_add(address_type, address); 6186 if (status){ 6187 return status; 6188 } 6189 hci_run(); 6190 return ERROR_CODE_SUCCESS; 6191 } 6192 6193 /** 6194 * @brief Remove Device from Whitelist 6195 * @param address_typ 6196 * @param address 6197 * @returns 0 if ok 6198 */ 6199 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6200 uint8_t status = hci_whitelist_remove(address_type, address); 6201 if (status){ 6202 return status; 6203 } 6204 hci_run(); 6205 return ERROR_CODE_SUCCESS; 6206 } 6207 6208 #ifdef ENABLE_LE_CENTRAL 6209 /** 6210 * @brief Connect with Whitelist 6211 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6212 * @returns - if ok 6213 */ 6214 uint8_t gap_connect_with_whitelist(void){ 6215 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6216 return ERROR_CODE_COMMAND_DISALLOWED; 6217 } 6218 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6219 hci_run(); 6220 return ERROR_CODE_SUCCESS; 6221 } 6222 6223 /** 6224 * @brief Auto Connection Establishment - Start Connecting to device 6225 * @param address_typ 6226 * @param address 6227 * @returns 0 if ok 6228 */ 6229 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6230 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6231 return ERROR_CODE_COMMAND_DISALLOWED; 6232 } 6233 6234 uint8_t status = hci_whitelist_add(address_type, address); 6235 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6236 return status; 6237 } 6238 6239 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6240 6241 hci_run(); 6242 return ERROR_CODE_SUCCESS; 6243 } 6244 6245 /** 6246 * @brief Auto Connection Establishment - Stop Connecting to device 6247 * @param address_typ 6248 * @param address 6249 * @returns 0 if ok 6250 */ 6251 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6252 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6253 return ERROR_CODE_COMMAND_DISALLOWED; 6254 } 6255 6256 hci_whitelist_remove(address_type, address); 6257 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6258 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6259 } 6260 hci_run(); 6261 return 0; 6262 } 6263 6264 /** 6265 * @brief Auto Connection Establishment - Stop everything 6266 * @note Convenience function to stop all active auto connection attempts 6267 */ 6268 uint8_t gap_auto_connection_stop_all(void){ 6269 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6270 return ERROR_CODE_COMMAND_DISALLOWED; 6271 } 6272 hci_whitelist_clear(); 6273 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6274 hci_run(); 6275 return ERROR_CODE_SUCCESS; 6276 } 6277 6278 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6279 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6280 if (!conn) return 0; 6281 return conn->le_connection_interval; 6282 } 6283 #endif 6284 #endif 6285 6286 #ifdef ENABLE_CLASSIC 6287 /** 6288 * @brief Set Extended Inquiry Response data 6289 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6290 * @note has to be done before stack starts up 6291 */ 6292 void gap_set_extended_inquiry_response(const uint8_t * data){ 6293 hci_stack->eir_data = data; 6294 } 6295 6296 /** 6297 * @brief Start GAP Classic Inquiry 6298 * @param duration in 1.28s units 6299 * @return 0 if ok 6300 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6301 */ 6302 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6303 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6304 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6305 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6306 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6307 } 6308 hci_stack->inquiry_state = duration_in_1280ms_units; 6309 hci_run(); 6310 return 0; 6311 } 6312 6313 /** 6314 * @brief Stop GAP Classic Inquiry 6315 * @returns 0 if ok 6316 */ 6317 int gap_inquiry_stop(void){ 6318 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6319 // emit inquiry complete event, before it even started 6320 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6321 hci_emit_event(event, sizeof(event), 1); 6322 return 0; 6323 } 6324 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6325 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6326 hci_run(); 6327 return 0; 6328 } 6329 6330 void gap_inquiry_set_lap(uint32_t lap){ 6331 hci_stack->inquiry_lap = lap; 6332 } 6333 6334 6335 /** 6336 * @brief Remote Name Request 6337 * @param addr 6338 * @param page_scan_repetition_mode 6339 * @param clock_offset only used when bit 15 is set 6340 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6341 */ 6342 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6343 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6344 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6345 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6346 hci_stack->remote_name_clock_offset = clock_offset; 6347 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6348 hci_run(); 6349 return 0; 6350 } 6351 6352 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6353 hci_stack->gap_pairing_state = state; 6354 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6355 hci_run(); 6356 return 0; 6357 } 6358 6359 /** 6360 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6361 * @param addr 6362 * @param pin_data 6363 * @param pin_len 6364 * @return 0 if ok 6365 */ 6366 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6367 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6368 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6369 hci_stack->gap_pairing_pin_len = pin_len; 6370 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6371 } 6372 6373 /** 6374 * @brief Legacy Pairing Pin Code Response 6375 * @param addr 6376 * @param pin 6377 * @return 0 if ok 6378 */ 6379 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6380 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6381 } 6382 6383 /** 6384 * @brief Abort Legacy Pairing 6385 * @param addr 6386 * @param pin 6387 * @return 0 if ok 6388 */ 6389 int gap_pin_code_negative(bd_addr_t addr){ 6390 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6391 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6392 } 6393 6394 /** 6395 * @brief SSP Passkey Response 6396 * @param addr 6397 * @param passkey 6398 * @return 0 if ok 6399 */ 6400 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6401 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6402 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6403 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6404 } 6405 6406 /** 6407 * @brief Abort SSP Passkey Entry/Pairing 6408 * @param addr 6409 * @param pin 6410 * @return 0 if ok 6411 */ 6412 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6413 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6414 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6415 } 6416 6417 /** 6418 * @brief Accept SSP Numeric Comparison 6419 * @param addr 6420 * @param passkey 6421 * @return 0 if ok 6422 */ 6423 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6424 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6425 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6426 } 6427 6428 /** 6429 * @brief Abort SSP Numeric Comparison/Pairing 6430 * @param addr 6431 * @param pin 6432 * @return 0 if ok 6433 */ 6434 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6435 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6436 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6437 } 6438 6439 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6440 6441 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6442 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6443 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6444 connectionSetAuthenticationFlags(conn, flag); 6445 hci_run(); 6446 return ERROR_CODE_SUCCESS; 6447 } 6448 6449 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6450 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6451 } 6452 6453 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6454 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6455 } 6456 #endif 6457 6458 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6459 /** 6460 * @brief Report Remote OOB Data 6461 * @param bd_addr 6462 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6463 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6464 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6465 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6466 */ 6467 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){ 6468 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6469 if (connection == NULL) { 6470 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6471 } 6472 connection->classic_oob_c_192 = c_192; 6473 connection->classic_oob_r_192 = r_192; 6474 6475 // ignore P-256 if not supported by us 6476 if (hci_stack->secure_connections_active){ 6477 connection->classic_oob_c_256 = c_256; 6478 connection->classic_oob_r_256 = r_256; 6479 } 6480 6481 return ERROR_CODE_SUCCESS; 6482 } 6483 /** 6484 * @brief Generate new OOB data 6485 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6486 */ 6487 void gap_ssp_generate_oob_data(void){ 6488 hci_stack->classic_read_local_oob_data = true; 6489 hci_run(); 6490 } 6491 6492 #endif 6493 6494 /** 6495 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6496 * @param inquiry_mode see bluetooth_defines.h 6497 */ 6498 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6499 hci_stack->inquiry_mode = inquiry_mode; 6500 } 6501 6502 /** 6503 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6504 */ 6505 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6506 hci_stack->sco_voice_setting = voice_setting; 6507 } 6508 6509 /** 6510 * @brief Get SCO Voice Setting 6511 * @return current voice setting 6512 */ 6513 uint16_t hci_get_sco_voice_setting(void){ 6514 return hci_stack->sco_voice_setting; 6515 } 6516 6517 static int hci_have_usb_transport(void){ 6518 if (!hci_stack->hci_transport) return 0; 6519 const char * transport_name = hci_stack->hci_transport->name; 6520 if (!transport_name) return 0; 6521 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6522 } 6523 6524 /** @brief Get SCO packet length for current SCO Voice setting 6525 * @note Using SCO packets of the exact length is required for USB transfer 6526 * @return Length of SCO packets in bytes (not audio frames) 6527 */ 6528 int hci_get_sco_packet_length(void){ 6529 int sco_packet_length = 0; 6530 6531 #ifdef ENABLE_SCO_OVER_HCI 6532 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6533 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6534 6535 if (hci_have_usb_transport()){ 6536 // see Core Spec for H2 USB Transfer. 6537 // 3 byte SCO header + 24 bytes per connection 6538 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6539 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6540 } else { 6541 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6542 sco_packet_length = 3 + 60 * multiplier; 6543 // assert that it still fits inside an SCO buffer 6544 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6545 sco_packet_length = 3 + 60; 6546 } 6547 } 6548 #endif 6549 6550 #ifdef HAVE_SCO_TRANSPORT 6551 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6552 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6553 sco_packet_length = 3 + 60 * multiplier; 6554 #endif 6555 return sco_packet_length; 6556 } 6557 6558 /** 6559 * @brief Sets the master/slave policy 6560 * @param policy (0: attempt to become master, 1: let connecting device decide) 6561 */ 6562 void hci_set_master_slave_policy(uint8_t policy){ 6563 hci_stack->master_slave_policy = policy; 6564 } 6565 6566 #endif 6567 6568 HCI_STATE hci_get_state(void){ 6569 return hci_stack->state; 6570 } 6571 6572 #ifdef ENABLE_CLASSIC 6573 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6574 hci_stack->gap_classic_accept_callback = accept_callback; 6575 } 6576 #endif 6577 6578 /** 6579 * @brief Set callback for Bluetooth Hardware Error 6580 */ 6581 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6582 hci_stack->hardware_error_callback = fn; 6583 } 6584 6585 void hci_disconnect_all(void){ 6586 btstack_linked_list_iterator_t it; 6587 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6588 while (btstack_linked_list_iterator_has_next(&it)){ 6589 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6590 if (con->state == SENT_DISCONNECT) continue; 6591 con->state = SEND_DISCONNECT; 6592 } 6593 hci_run(); 6594 } 6595 6596 uint16_t hci_get_manufacturer(void){ 6597 return hci_stack->manufacturer; 6598 } 6599 6600 #ifdef ENABLE_BLE 6601 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6602 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6603 if (!hci_con) return NULL; 6604 return &hci_con->sm_connection; 6605 } 6606 6607 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6608 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6609 #endif 6610 6611 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6612 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6613 if (hci_connection == NULL) return 0; 6614 if (hci_is_le_connection(hci_connection)){ 6615 #ifdef ENABLE_BLE 6616 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6617 if (sm_conn->sm_connection_encrypted) { 6618 return sm_conn->sm_actual_encryption_key_size; 6619 } 6620 #endif 6621 } else { 6622 #ifdef ENABLE_CLASSIC 6623 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6624 return hci_connection->encryption_key_size; 6625 } 6626 #endif 6627 } 6628 return 0; 6629 } 6630 6631 int gap_authenticated(hci_con_handle_t con_handle){ 6632 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6633 if (hci_connection == NULL) return 0; 6634 6635 switch (hci_connection->address_type){ 6636 #ifdef ENABLE_BLE 6637 case BD_ADDR_TYPE_LE_PUBLIC: 6638 case BD_ADDR_TYPE_LE_RANDOM: 6639 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6640 return hci_connection->sm_connection.sm_connection_authenticated; 6641 #endif 6642 #ifdef ENABLE_CLASSIC 6643 case BD_ADDR_TYPE_SCO: 6644 case BD_ADDR_TYPE_ACL: 6645 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6646 #endif 6647 default: 6648 return 0; 6649 } 6650 } 6651 6652 int gap_secure_connection(hci_con_handle_t con_handle){ 6653 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6654 if (hci_connection == NULL) return 0; 6655 6656 switch (hci_connection->address_type){ 6657 #ifdef ENABLE_BLE 6658 case BD_ADDR_TYPE_LE_PUBLIC: 6659 case BD_ADDR_TYPE_LE_RANDOM: 6660 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6661 return hci_connection->sm_connection.sm_connection_sc; 6662 #endif 6663 #ifdef ENABLE_CLASSIC 6664 case BD_ADDR_TYPE_SCO: 6665 case BD_ADDR_TYPE_ACL: 6666 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6667 #endif 6668 default: 6669 return 0; 6670 } 6671 } 6672 6673 bool gap_bonded(hci_con_handle_t con_handle){ 6674 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6675 if (hci_connection == NULL) return 0; 6676 6677 #ifdef ENABLE_CLASSIC 6678 link_key_t link_key; 6679 link_key_type_t link_key_type; 6680 #endif 6681 switch (hci_connection->address_type){ 6682 #ifdef ENABLE_BLE 6683 case BD_ADDR_TYPE_LE_PUBLIC: 6684 case BD_ADDR_TYPE_LE_RANDOM: 6685 return hci_connection->sm_connection.sm_le_db_index >= 0; 6686 #endif 6687 #ifdef ENABLE_CLASSIC 6688 case BD_ADDR_TYPE_SCO: 6689 case BD_ADDR_TYPE_ACL: 6690 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6691 #endif 6692 default: 6693 return false; 6694 } 6695 } 6696 6697 #ifdef ENABLE_BLE 6698 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6699 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6700 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6701 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6702 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6703 return sm_conn->sm_connection_authorization_state; 6704 } 6705 #endif 6706 6707 #ifdef ENABLE_CLASSIC 6708 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){ 6709 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6710 if (!conn) return GAP_CONNECTION_INVALID; 6711 conn->sniff_min_interval = sniff_min_interval; 6712 conn->sniff_max_interval = sniff_max_interval; 6713 conn->sniff_attempt = sniff_attempt; 6714 conn->sniff_timeout = sniff_timeout; 6715 hci_run(); 6716 return 0; 6717 } 6718 6719 /** 6720 * @brief Exit Sniff mode 6721 * @param con_handle 6722 @ @return 0 if ok 6723 */ 6724 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6725 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6726 if (!conn) return GAP_CONNECTION_INVALID; 6727 conn->sniff_min_interval = 0xffff; 6728 hci_run(); 6729 return 0; 6730 } 6731 6732 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){ 6733 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6734 if (!conn) return GAP_CONNECTION_INVALID; 6735 conn->sniff_subrating_max_latency = max_latency; 6736 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6737 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6738 hci_run(); 6739 return ERROR_CODE_SUCCESS; 6740 } 6741 6742 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){ 6743 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6744 if (!conn) return GAP_CONNECTION_INVALID; 6745 conn->qos_service_type = service_type; 6746 conn->qos_token_rate = token_rate; 6747 conn->qos_peak_bandwidth = peak_bandwidth; 6748 conn->qos_latency = latency; 6749 conn->qos_delay_variation = delay_variation; 6750 hci_run(); 6751 return ERROR_CODE_SUCCESS; 6752 } 6753 6754 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6755 hci_stack->new_page_scan_interval = page_scan_interval; 6756 hci_stack->new_page_scan_window = page_scan_window; 6757 hci_run(); 6758 } 6759 6760 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6761 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6762 hci_run(); 6763 } 6764 6765 #endif 6766 6767 void hci_halting_defer(void){ 6768 if (hci_stack->state != HCI_STATE_HALTING) return; 6769 switch (hci_stack->substate){ 6770 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6771 case HCI_HALTING_CLOSE: 6772 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6773 break; 6774 default: 6775 break; 6776 } 6777 } 6778 6779 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6780 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6781 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6782 if (le_device_db_index >= le_device_db_max_count()) return; 6783 uint8_t offset = le_device_db_index >> 3; 6784 uint8_t mask = 1 << (le_device_db_index & 7); 6785 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6786 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6787 // note: go back to remove entries, otherwise, a remove + add will skip the add 6788 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6789 } 6790 } 6791 6792 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6793 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6794 if (le_device_db_index >= le_device_db_max_count()) return; 6795 uint8_t offset = le_device_db_index >> 3; 6796 uint8_t mask = 1 << (le_device_db_index & 7); 6797 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6798 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6799 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6800 } 6801 } 6802 6803 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6804 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6805 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6806 } 6807 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6808 // restart le resolving list update 6809 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6810 } 6811 return ERROR_CODE_SUCCESS; 6812 } 6813 #endif 6814 6815 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6816 void hci_setup_test_connections_fuzz(void){ 6817 hci_connection_t * conn; 6818 6819 // default address: 66:55:44:33:00:01 6820 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6821 6822 // setup Controller info 6823 hci_stack->num_cmd_packets = 255; 6824 hci_stack->acl_packets_total_num = 255; 6825 6826 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6827 addr[5] = 0x01; 6828 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6829 conn->con_handle = addr[5]; 6830 conn->role = HCI_ROLE_SLAVE; 6831 conn->state = RECEIVED_CONNECTION_REQUEST; 6832 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6833 6834 // setup incoming Classic SCO connection with con handle 0x0002 6835 addr[5] = 0x02; 6836 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6837 conn->con_handle = addr[5]; 6838 conn->role = HCI_ROLE_SLAVE; 6839 conn->state = RECEIVED_CONNECTION_REQUEST; 6840 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6841 6842 // setup ready Classic ACL connection with con handle 0x0003 6843 addr[5] = 0x03; 6844 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6845 conn->con_handle = addr[5]; 6846 conn->role = HCI_ROLE_SLAVE; 6847 conn->state = OPEN; 6848 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6849 6850 // setup ready Classic SCO connection with con handle 0x0004 6851 addr[5] = 0x04; 6852 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6853 conn->con_handle = addr[5]; 6854 conn->role = HCI_ROLE_SLAVE; 6855 conn->state = OPEN; 6856 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6857 6858 // setup ready LE ACL connection with con handle 0x005 and public address 6859 addr[5] = 0x05; 6860 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6861 conn->con_handle = addr[5]; 6862 conn->role = HCI_ROLE_SLAVE; 6863 conn->state = OPEN; 6864 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6865 conn->sm_connection.sm_connection_encrypted = 1; 6866 } 6867 6868 void hci_free_connections_fuzz(void){ 6869 btstack_linked_list_iterator_t it; 6870 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6871 while (btstack_linked_list_iterator_has_next(&it)){ 6872 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6873 btstack_linked_list_iterator_remove(&it); 6874 btstack_memory_hci_connection_free(con); 6875 } 6876 } 6877 void hci_simulate_working_fuzz(void){ 6878 hci_init_done(); 6879 hci_stack->num_cmd_packets = 255; 6880 } 6881 #endif 6882