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 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->role = HCI_ROLE_INVALID; 199 conn->address_type = addr_type; 200 conn->con_handle = 0xffff; 201 conn->authentication_flags = AUTH_FLAGS_NONE; 202 conn->bonding_flags = 0; 203 conn->requested_security_level = LEVEL_0; 204 #ifdef ENABLE_CLASSIC 205 conn->request_role = HCI_ROLE_INVALID; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 222 return conn; 223 } 224 225 226 /** 227 * get le connection parameter range 228 * 229 * @return le connection parameter range struct 230 */ 231 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 232 *range = hci_stack->le_connection_parameter_range; 233 } 234 235 /** 236 * set le connection parameter range 237 * 238 */ 239 240 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 241 hci_stack->le_connection_parameter_range = *range; 242 } 243 244 /** 245 * @brief Test if connection parameters are inside in existing rage 246 * @param conn_interval_min (unit: 1.25ms) 247 * @param conn_interval_max (unit: 1.25ms) 248 * @param conn_latency 249 * @param supervision_timeout (unit: 10ms) 250 * @returns 1 if included 251 */ 252 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){ 253 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 254 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 255 256 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 257 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 258 259 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 260 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 261 262 return 1; 263 } 264 265 /** 266 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 267 * @note: default: 1 268 * @param max_peripheral_connections 269 */ 270 #ifdef ENABLE_LE_PERIPHERAL 271 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 272 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 273 } 274 #endif 275 276 /** 277 * get hci connections iterator 278 * 279 * @return hci connections iterator 280 */ 281 282 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 283 btstack_linked_list_iterator_init(it, &hci_stack->connections); 284 } 285 286 /** 287 * get connection for a given handle 288 * 289 * @return connection OR NULL, if not found 290 */ 291 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 296 if ( item->con_handle == con_handle ) { 297 return item; 298 } 299 } 300 return NULL; 301 } 302 303 /** 304 * get connection for given address 305 * 306 * @return connection OR NULL, if not found 307 */ 308 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 313 if (connection->address_type != addr_type) continue; 314 if (memcmp(addr, connection->address, 6) != 0) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 321 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 322 } 323 324 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 326 } 327 328 #ifdef ENABLE_CLASSIC 329 330 #ifdef ENABLE_SCO_OVER_HCI 331 static int hci_number_sco_connections(void){ 332 int connections = 0; 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 338 connections++; 339 } 340 return connections; 341 } 342 #endif 343 344 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 346 #ifdef HAVE_EMBEDDED_TICK 347 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 348 // connections might be timed out 349 hci_emit_l2cap_check_timeout(connection); 350 } 351 #else 352 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 353 // connections might be timed out 354 hci_emit_l2cap_check_timeout(connection); 355 } 356 #endif 357 } 358 359 static void hci_connection_timestamp(hci_connection_t *connection){ 360 #ifdef HAVE_EMBEDDED_TICK 361 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 362 #else 363 connection->timestamp = btstack_run_loop_get_time_ms(); 364 #endif 365 } 366 367 /** 368 * add authentication flags and reset timer 369 * @note: assumes classic connection 370 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 371 */ 372 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 373 bd_addr_t addr; 374 reverse_bd_addr(bd_addr, addr); 375 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 376 if (conn) { 377 connectionSetAuthenticationFlags(conn, flags); 378 hci_connection_timestamp(conn); 379 } 380 } 381 382 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 383 hci_connection_t * conn = hci_connection_for_handle(handle); 384 if (!conn) return 0; 385 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 386 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 387 return 0; 388 } 389 390 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 393 hci_stack->link_key_db->delete_link_key(addr); 394 } 395 396 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 397 if (!hci_stack->link_key_db) return; 398 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 399 hci_stack->link_key_db->put_link_key(addr, link_key, type); 400 } 401 402 void gap_delete_all_link_keys(void){ 403 bd_addr_t addr; 404 link_key_t link_key; 405 link_key_type_t type; 406 btstack_link_key_iterator_t it; 407 int ok = gap_link_key_iterator_init(&it); 408 if (!ok) { 409 log_error("could not initialize iterator"); 410 return; 411 } 412 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 413 gap_drop_link_key_for_bd_addr(addr); 414 } 415 gap_link_key_iterator_done(&it); 416 } 417 418 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 419 if (!hci_stack->link_key_db) return 0; 420 if (!hci_stack->link_key_db->iterator_init) return 0; 421 return hci_stack->link_key_db->iterator_init(it); 422 } 423 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){ 424 if (!hci_stack->link_key_db) return 0; 425 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 426 } 427 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 428 if (!hci_stack->link_key_db) return; 429 hci_stack->link_key_db->iterator_done(it); 430 } 431 #endif 432 433 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 434 switch (address_type){ 435 case BD_ADDR_TYPE_LE_PUBLIC: 436 case BD_ADDR_TYPE_LE_RANDOM: 437 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 438 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 439 return true; 440 default: 441 return false; 442 } 443 } 444 445 static int hci_is_le_connection(hci_connection_t * connection){ 446 return hci_is_le_connection_type(connection->address_type); 447 } 448 449 /** 450 * count connections 451 */ 452 static int nr_hci_connections(void){ 453 int count = 0; 454 btstack_linked_item_t *it; 455 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 456 count++; 457 } 458 return count; 459 } 460 461 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 462 463 unsigned int num_packets_sent_classic = 0; 464 unsigned int num_packets_sent_le = 0; 465 466 btstack_linked_item_t *it; 467 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 468 hci_connection_t * connection = (hci_connection_t *) it; 469 if (hci_is_le_connection(connection)){ 470 num_packets_sent_le += connection->num_packets_sent; 471 } 472 if (connection->address_type == BD_ADDR_TYPE_ACL){ 473 num_packets_sent_classic += connection->num_packets_sent; 474 } 475 } 476 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 477 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 478 int free_slots_le = 0; 479 480 if (free_slots_classic < 0){ 481 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); 482 return 0; 483 } 484 485 if (hci_stack->le_acl_packets_total_num){ 486 // if we have LE slots, they are used 487 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 488 if (free_slots_le < 0){ 489 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); 490 return 0; 491 } 492 } else { 493 // otherwise, classic slots are used for LE, too 494 free_slots_classic -= num_packets_sent_le; 495 if (free_slots_classic < 0){ 496 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); 497 return 0; 498 } 499 } 500 501 switch (address_type){ 502 case BD_ADDR_TYPE_UNKNOWN: 503 log_error("hci_number_free_acl_slots: unknown address type"); 504 return 0; 505 506 case BD_ADDR_TYPE_ACL: 507 return free_slots_classic; 508 509 default: 510 if (hci_stack->le_acl_packets_total_num){ 511 return free_slots_le; 512 } 513 return free_slots_classic; 514 } 515 } 516 517 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 518 // get connection type 519 hci_connection_t * connection = hci_connection_for_handle(con_handle); 520 if (!connection){ 521 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 522 return 0; 523 } 524 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 525 } 526 527 #ifdef ENABLE_CLASSIC 528 static int hci_number_free_sco_slots(void){ 529 unsigned int num_sco_packets_sent = 0; 530 btstack_linked_item_t *it; 531 if (hci_stack->synchronous_flow_control_enabled){ 532 // explicit flow control 533 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 534 hci_connection_t * connection = (hci_connection_t *) it; 535 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 536 num_sco_packets_sent += connection->num_packets_sent; 537 } 538 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 539 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 540 return 0; 541 } 542 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 543 } else { 544 // implicit flow control -- TODO 545 int num_ready = 0; 546 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 547 hci_connection_t * connection = (hci_connection_t *) it; 548 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 549 if (connection->sco_tx_ready == 0) continue; 550 num_ready++; 551 } 552 return num_ready; 553 } 554 } 555 #endif 556 557 // only used to send HCI Host Number Completed Packets 558 static int hci_can_send_comand_packet_transport(void){ 559 if (hci_stack->hci_packet_buffer_reserved) return 0; 560 561 // check for async hci transport implementations 562 if (hci_stack->hci_transport->can_send_packet_now){ 563 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 564 return 0; 565 } 566 } 567 return 1; 568 } 569 570 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 571 int hci_can_send_command_packet_now(void){ 572 if (hci_can_send_comand_packet_transport() == 0) return 0; 573 return hci_stack->num_cmd_packets > 0u; 574 } 575 576 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 577 // check for async hci transport implementations 578 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 579 return hci_stack->hci_transport->can_send_packet_now(packet_type); 580 } 581 582 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 583 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 584 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 585 } 586 587 int hci_can_send_acl_le_packet_now(void){ 588 if (hci_stack->hci_packet_buffer_reserved) return 0; 589 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 590 } 591 592 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 593 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 594 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 595 } 596 597 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_now(con_handle); 600 } 601 602 #ifdef ENABLE_CLASSIC 603 int hci_can_send_acl_classic_packet_now(void){ 604 if (hci_stack->hci_packet_buffer_reserved) return 0; 605 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 606 } 607 608 int hci_can_send_prepared_sco_packet_now(void){ 609 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 610 if (hci_have_usb_transport()){ 611 return hci_stack->sco_can_send_now; 612 } else { 613 return hci_number_free_sco_slots() > 0; 614 } 615 } 616 617 int hci_can_send_sco_packet_now(void){ 618 if (hci_stack->hci_packet_buffer_reserved) return 0; 619 return hci_can_send_prepared_sco_packet_now(); 620 } 621 622 void hci_request_sco_can_send_now_event(void){ 623 hci_stack->sco_waiting_for_can_send_now = 1; 624 hci_notify_if_sco_can_send_now(); 625 } 626 #endif 627 628 // used for internal checks in l2cap.c 629 int hci_is_packet_buffer_reserved(void){ 630 return hci_stack->hci_packet_buffer_reserved; 631 } 632 633 // reserves outgoing packet buffer. @returns 1 if successful 634 int hci_reserve_packet_buffer(void){ 635 if (hci_stack->hci_packet_buffer_reserved) { 636 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 637 return 0; 638 } 639 hci_stack->hci_packet_buffer_reserved = 1; 640 return 1; 641 } 642 643 void hci_release_packet_buffer(void){ 644 hci_stack->hci_packet_buffer_reserved = 0; 645 } 646 647 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 648 static int hci_transport_synchronous(void){ 649 return hci_stack->hci_transport->can_send_packet_now == NULL; 650 } 651 652 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 653 654 // 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); 655 656 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 657 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 658 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 659 max_acl_data_packet_length = hci_stack->le_data_packets_length; 660 } 661 662 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 663 if (hci_is_le_connection(connection)){ 664 max_acl_data_packet_length = connection->le_max_tx_octets; 665 } 666 #endif 667 668 log_debug("hci_send_acl_packet_fragments entered"); 669 670 int err; 671 // multiple packets could be send on a synchronous HCI transport 672 while (true){ 673 674 log_debug("hci_send_acl_packet_fragments loop entered"); 675 676 // get current data 677 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 678 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 679 int more_fragments = 0; 680 681 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 682 if (current_acl_data_packet_length > max_acl_data_packet_length){ 683 more_fragments = 1; 684 current_acl_data_packet_length = max_acl_data_packet_length; 685 } 686 687 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 688 if (acl_header_pos > 0u){ 689 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 690 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 691 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 692 } 693 694 // update header len 695 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 696 697 // count packet 698 connection->num_packets_sent++; 699 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 700 701 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 702 if (more_fragments){ 703 // update start of next fragment to send 704 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 705 } else { 706 // done 707 hci_stack->acl_fragmentation_pos = 0; 708 hci_stack->acl_fragmentation_total_size = 0; 709 } 710 711 // send packet 712 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 713 const int size = current_acl_data_packet_length + 4; 714 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 715 hci_stack->acl_fragmentation_tx_active = 1; 716 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 717 718 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 719 720 // done yet? 721 if (!more_fragments) break; 722 723 // can send more? 724 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 725 } 726 727 log_debug("hci_send_acl_packet_fragments loop over"); 728 729 // release buffer now for synchronous transport 730 if (hci_transport_synchronous()){ 731 hci_stack->acl_fragmentation_tx_active = 0; 732 hci_release_packet_buffer(); 733 hci_emit_transport_packet_sent(); 734 } 735 736 return err; 737 } 738 739 // pre: caller has reserved the packet buffer 740 int hci_send_acl_packet_buffer(int size){ 741 742 // log_info("hci_send_acl_packet_buffer size %u", size); 743 744 if (!hci_stack->hci_packet_buffer_reserved) { 745 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 746 return 0; 747 } 748 749 uint8_t * packet = hci_stack->hci_packet_buffer; 750 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 751 752 // check for free places on Bluetooth module 753 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 754 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 755 hci_release_packet_buffer(); 756 hci_emit_transport_packet_sent(); 757 return BTSTACK_ACL_BUFFERS_FULL; 758 } 759 760 hci_connection_t *connection = hci_connection_for_handle( con_handle); 761 if (!connection) { 762 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 763 hci_release_packet_buffer(); 764 hci_emit_transport_packet_sent(); 765 return 0; 766 } 767 768 #ifdef ENABLE_CLASSIC 769 hci_connection_timestamp(connection); 770 #endif 771 772 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 773 774 // setup data 775 hci_stack->acl_fragmentation_total_size = size; 776 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 777 778 return hci_send_acl_packet_fragments(connection); 779 } 780 781 #ifdef ENABLE_CLASSIC 782 // pre: caller has reserved the packet buffer 783 int hci_send_sco_packet_buffer(int size){ 784 785 // log_info("hci_send_acl_packet_buffer size %u", size); 786 787 if (!hci_stack->hci_packet_buffer_reserved) { 788 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 789 return 0; 790 } 791 792 uint8_t * packet = hci_stack->hci_packet_buffer; 793 794 // skip checks in loopback mode 795 if (!hci_stack->loopback_mode){ 796 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 797 798 // check for free places on Bluetooth module 799 if (!hci_can_send_prepared_sco_packet_now()) { 800 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 801 hci_release_packet_buffer(); 802 hci_emit_transport_packet_sent(); 803 return BTSTACK_ACL_BUFFERS_FULL; 804 } 805 806 // track send packet in connection struct 807 hci_connection_t *connection = hci_connection_for_handle( con_handle); 808 if (!connection) { 809 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 810 hci_release_packet_buffer(); 811 hci_emit_transport_packet_sent(); 812 return 0; 813 } 814 815 if (hci_have_usb_transport()){ 816 // token used 817 hci_stack->sco_can_send_now = 0; 818 } else { 819 if (hci_stack->synchronous_flow_control_enabled){ 820 connection->num_packets_sent++; 821 } else { 822 connection->sco_tx_ready--; 823 } 824 } 825 } 826 827 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 828 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 829 830 if (hci_transport_synchronous()){ 831 hci_release_packet_buffer(); 832 hci_emit_transport_packet_sent(); 833 } 834 835 return err; 836 } 837 #endif 838 839 static void acl_handler(uint8_t *packet, uint16_t size){ 840 841 // get info 842 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 843 hci_connection_t *conn = hci_connection_for_handle(con_handle); 844 uint8_t acl_flags = READ_ACL_FLAGS(packet); 845 uint16_t acl_length = READ_ACL_LENGTH(packet); 846 847 // ignore non-registered handle 848 if (!conn){ 849 log_error("acl_handler called with non-registered handle %u!" , con_handle); 850 return; 851 } 852 853 // assert packet is complete 854 if ((acl_length + 4u) != size){ 855 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 856 return; 857 } 858 859 #ifdef ENABLE_CLASSIC 860 // update idle timestamp 861 hci_connection_timestamp(conn); 862 #endif 863 864 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 865 hci_stack->host_completed_packets = 1; 866 conn->num_packets_completed++; 867 #endif 868 869 // handle different packet types 870 switch (acl_flags & 0x03u) { 871 872 case 0x01: // continuation fragment 873 874 // sanity checks 875 if (conn->acl_recombination_pos == 0u) { 876 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 877 return; 878 } 879 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 880 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 881 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 882 conn->acl_recombination_pos = 0; 883 return; 884 } 885 886 // append fragment payload (header already stored) 887 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 888 &packet[4], acl_length); 889 conn->acl_recombination_pos += acl_length; 890 891 // forward complete L2CAP packet if complete. 892 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 893 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 894 // reset recombination buffer 895 conn->acl_recombination_length = 0; 896 conn->acl_recombination_pos = 0; 897 } 898 break; 899 900 case 0x02: { // first fragment 901 902 // sanity check 903 if (conn->acl_recombination_pos) { 904 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 905 conn->acl_recombination_pos = 0; 906 } 907 908 // peek into L2CAP packet! 909 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 910 911 // compare fragment size to L2CAP packet size 912 if (acl_length >= (l2cap_length + 4u)){ 913 // forward fragment as L2CAP packet 914 hci_emit_acl_packet(packet, acl_length + 4u); 915 } else { 916 917 if (acl_length > HCI_ACL_BUFFER_SIZE){ 918 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 919 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 920 return; 921 } 922 923 // store first fragment and tweak acl length for complete package 924 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 925 packet, acl_length + 4u); 926 conn->acl_recombination_pos = acl_length + 4u; 927 conn->acl_recombination_length = l2cap_length; 928 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 929 } 930 break; 931 932 } 933 default: 934 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 935 return; 936 } 937 938 // execute main loop 939 hci_run(); 940 } 941 942 static void hci_shutdown_connection(hci_connection_t *conn){ 943 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 944 945 #ifdef ENABLE_CLASSIC 946 #ifdef ENABLE_SCO_OVER_HCI 947 int addr_type = conn->address_type; 948 #endif 949 #endif 950 951 btstack_run_loop_remove_timer(&conn->timeout); 952 953 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 954 btstack_memory_hci_connection_free( conn ); 955 956 // now it's gone 957 hci_emit_nr_connections_changed(); 958 959 #ifdef ENABLE_CLASSIC 960 #ifdef ENABLE_SCO_OVER_HCI 961 // update SCO 962 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 963 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 964 } 965 #endif 966 #endif 967 } 968 969 #ifdef ENABLE_CLASSIC 970 971 static const uint16_t packet_type_sizes[] = { 972 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 973 HCI_ACL_DH1_SIZE, 0, 0, 0, 974 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 975 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 976 }; 977 static const uint8_t packet_type_feature_requirement_bit[] = { 978 0, // 3 slot packets 979 1, // 5 slot packets 980 25, // EDR 2 mpbs 981 26, // EDR 3 mbps 982 39, // 3 slot EDR packts 983 40, // 5 slot EDR packet 984 }; 985 static const uint16_t packet_type_feature_packet_mask[] = { 986 0x0f00, // 3 slot packets 987 0xf000, // 5 slot packets 988 0x1102, // EDR 2 mpbs 989 0x2204, // EDR 3 mbps 990 0x0300, // 3 slot EDR packts 991 0x3000, // 5 slot EDR packet 992 }; 993 994 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 995 // enable packet types based on size 996 uint16_t packet_types = 0; 997 unsigned int i; 998 for (i=0;i<16;i++){ 999 if (packet_type_sizes[i] == 0) continue; 1000 if (packet_type_sizes[i] <= buffer_size){ 1001 packet_types |= 1 << i; 1002 } 1003 } 1004 // disable packet types due to missing local supported features 1005 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1006 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1007 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1008 if (feature_set) continue; 1009 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1010 packet_types &= ~packet_type_feature_packet_mask[i]; 1011 } 1012 // flip bits for "may not be used" 1013 packet_types ^= 0x3306; 1014 return packet_types; 1015 } 1016 1017 uint16_t hci_usable_acl_packet_types(void){ 1018 return hci_stack->packet_types; 1019 } 1020 #endif 1021 1022 uint8_t* hci_get_outgoing_packet_buffer(void){ 1023 // hci packet buffer is >= acl data packet length 1024 return hci_stack->hci_packet_buffer; 1025 } 1026 1027 uint16_t hci_max_acl_data_packet_length(void){ 1028 return hci_stack->acl_data_packet_length; 1029 } 1030 1031 #ifdef ENABLE_CLASSIC 1032 int hci_extended_sco_link_supported(void){ 1033 // No. 31, byte 3, bit 7 1034 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1035 } 1036 #endif 1037 1038 int hci_non_flushable_packet_boundary_flag_supported(void){ 1039 // No. 54, byte 6, bit 6 1040 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1041 } 1042 1043 static int gap_ssp_supported(void){ 1044 // No. 51, byte 6, bit 3 1045 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1046 } 1047 1048 static int hci_classic_supported(void){ 1049 #ifdef ENABLE_CLASSIC 1050 // No. 37, byte 4, bit 5, = No BR/EDR Support 1051 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1052 #else 1053 return 0; 1054 #endif 1055 } 1056 1057 static int hci_le_supported(void){ 1058 #ifdef ENABLE_BLE 1059 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1060 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1061 #else 1062 return 0; 1063 #endif 1064 } 1065 1066 #ifdef ENABLE_BLE 1067 1068 /** 1069 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1070 */ 1071 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1072 *addr_type = hci_stack->le_own_addr_type; 1073 if (hci_stack->le_own_addr_type){ 1074 (void)memcpy(addr, hci_stack->le_random_address, 6); 1075 } else { 1076 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1077 } 1078 } 1079 1080 #ifdef ENABLE_LE_CENTRAL 1081 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1082 1083 int offset = 3; 1084 int num_reports = packet[offset]; 1085 offset += 1; 1086 1087 int i; 1088 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1089 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1090 for (i=0; (i<num_reports) && (offset < size);i++){ 1091 // sanity checks on data_length: 1092 uint8_t data_length = packet[offset + 8]; 1093 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1094 if ((offset + 9u + data_length + 1u) > size) return; 1095 // setup event 1096 uint8_t event_size = 10u + data_length; 1097 int pos = 0; 1098 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1099 event[pos++] = event_size; 1100 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1101 offset += 8; 1102 pos += 8; 1103 event[pos++] = packet[offset + 1 + data_length]; // rssi 1104 event[pos++] = data_length; 1105 offset++; 1106 (void)memcpy(&event[pos], &packet[offset], data_length); 1107 pos += data_length; 1108 offset += data_length + 1u; // rssi 1109 hci_emit_event(event, pos, 1); 1110 } 1111 } 1112 #endif 1113 #endif 1114 1115 #ifdef ENABLE_BLE 1116 #ifdef ENABLE_LE_PERIPHERAL 1117 static void hci_update_advertisements_enabled_for_current_roles(void){ 1118 if (hci_stack->le_advertisements_enabled){ 1119 // get number of active le slave connections 1120 int num_slave_connections = 0; 1121 btstack_linked_list_iterator_t it; 1122 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1123 while (btstack_linked_list_iterator_has_next(&it)){ 1124 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1125 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1126 if (con->state != OPEN) continue; 1127 if (con->role != HCI_ROLE_SLAVE) continue; 1128 if (!hci_is_le_connection(con)) continue; 1129 num_slave_connections++; 1130 } 1131 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1132 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1133 } else { 1134 hci_stack->le_advertisements_enabled_for_current_roles = false; 1135 } 1136 } 1137 #endif 1138 #endif 1139 1140 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1141 1142 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1143 if (!hci_stack->config) return 0; 1144 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1145 // Limit baud rate for Broadcom chipsets to 3 mbps 1146 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1147 baud_rate = 3000000; 1148 } 1149 return baud_rate; 1150 } 1151 1152 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1153 UNUSED(ds); 1154 1155 switch (hci_stack->substate){ 1156 case HCI_INIT_W4_SEND_RESET: 1157 log_info("Resend HCI Reset"); 1158 hci_stack->substate = HCI_INIT_SEND_RESET; 1159 hci_stack->num_cmd_packets = 1; 1160 hci_run(); 1161 break; 1162 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1163 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1164 if (hci_stack->hci_transport->reset_link){ 1165 hci_stack->hci_transport->reset_link(); 1166 } 1167 1168 /* fall through */ 1169 1170 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1171 log_info("Resend HCI Reset - CSR Warm Boot"); 1172 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1173 hci_stack->num_cmd_packets = 1; 1174 hci_run(); 1175 break; 1176 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1177 if (hci_stack->hci_transport->set_baudrate){ 1178 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1179 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1180 hci_stack->hci_transport->set_baudrate(baud_rate); 1181 } 1182 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1183 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1184 if (hci_stack->hci_transport->reset_link){ 1185 log_info("Link Reset"); 1186 hci_stack->hci_transport->reset_link(); 1187 } 1188 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1189 hci_run(); 1190 } 1191 break; 1192 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1193 // otherwise continue 1194 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1195 hci_send_cmd(&hci_read_local_supported_commands); 1196 break; 1197 default: 1198 break; 1199 } 1200 } 1201 #endif 1202 1203 static void hci_initializing_next_state(void){ 1204 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1205 } 1206 1207 // assumption: hci_can_send_command_packet_now() == true 1208 static void hci_initializing_run(void){ 1209 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1210 switch (hci_stack->substate){ 1211 case HCI_INIT_SEND_RESET: 1212 hci_state_reset(); 1213 1214 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1215 // prepare reset if command complete not received in 100ms 1216 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1217 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1218 btstack_run_loop_add_timer(&hci_stack->timeout); 1219 #endif 1220 // send command 1221 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1222 hci_send_cmd(&hci_reset); 1223 break; 1224 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1225 hci_send_cmd(&hci_read_local_version_information); 1226 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1227 break; 1228 case HCI_INIT_SEND_READ_LOCAL_NAME: 1229 hci_send_cmd(&hci_read_local_name); 1230 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1231 break; 1232 1233 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1234 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1235 hci_state_reset(); 1236 // prepare reset if command complete not received in 100ms 1237 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1238 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1239 btstack_run_loop_add_timer(&hci_stack->timeout); 1240 // send command 1241 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1242 hci_send_cmd(&hci_reset); 1243 break; 1244 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1245 hci_state_reset(); 1246 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1247 hci_send_cmd(&hci_reset); 1248 break; 1249 case HCI_INIT_SEND_BAUD_CHANGE: { 1250 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1251 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1252 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1253 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1254 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1255 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1256 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1257 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1258 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1259 btstack_run_loop_add_timer(&hci_stack->timeout); 1260 } 1261 break; 1262 } 1263 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1264 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1265 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1266 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1267 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1268 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1269 break; 1270 } 1271 case HCI_INIT_CUSTOM_INIT: 1272 // Custom initialization 1273 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1274 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1275 int send_cmd = 0; 1276 switch (hci_stack->chipset_result){ 1277 case BTSTACK_CHIPSET_VALID_COMMAND: 1278 send_cmd = 1; 1279 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1280 break; 1281 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1282 send_cmd = 1; 1283 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1284 log_info("CSR Warm Boot"); 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1287 btstack_run_loop_add_timer(&hci_stack->timeout); 1288 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1289 && hci_stack->config 1290 && hci_stack->chipset 1291 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1292 && hci_stack->hci_transport->set_baudrate 1293 && hci_transport_uart_get_main_baud_rate()){ 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1295 } else { 1296 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1297 } 1298 break; 1299 default: 1300 break; 1301 } 1302 1303 if (send_cmd){ 1304 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1305 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1306 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1307 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1308 break; 1309 } 1310 log_info("Init script done"); 1311 1312 // Init script download on Broadcom chipsets causes: 1313 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1314 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1315 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1316 1317 // - baud rate to reset, restore UART baud rate if needed 1318 int need_baud_change = hci_stack->config 1319 && hci_stack->chipset 1320 && hci_stack->chipset->set_baudrate_command 1321 && hci_stack->hci_transport->set_baudrate 1322 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1323 if (need_baud_change) { 1324 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1325 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1326 hci_stack->hci_transport->set_baudrate(baud_rate); 1327 } 1328 1329 uint16_t bcm_delay_ms = 300; 1330 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1331 // -> Work around: wait here. 1332 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1333 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1334 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1335 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1336 btstack_run_loop_add_timer(&hci_stack->timeout); 1337 break; 1338 } 1339 } 1340 // otherwise continue 1341 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1342 hci_send_cmd(&hci_read_local_supported_commands); 1343 break; 1344 case HCI_INIT_SET_BD_ADDR: 1345 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1346 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1350 break; 1351 #endif 1352 1353 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1354 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1355 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1356 hci_send_cmd(&hci_read_local_supported_commands); 1357 break; 1358 case HCI_INIT_READ_BD_ADDR: 1359 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1360 hci_send_cmd(&hci_read_bd_addr); 1361 break; 1362 case HCI_INIT_READ_BUFFER_SIZE: 1363 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1364 hci_send_cmd(&hci_read_buffer_size); 1365 break; 1366 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1367 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1368 hci_send_cmd(&hci_read_local_supported_features); 1369 break; 1370 1371 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1372 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1373 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1374 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1375 break; 1376 case HCI_INIT_HOST_BUFFER_SIZE: 1377 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1378 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1379 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1380 break; 1381 #endif 1382 1383 case HCI_INIT_SET_EVENT_MASK: 1384 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1385 if (hci_le_supported()){ 1386 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1387 } else { 1388 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1389 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1390 } 1391 break; 1392 1393 #ifdef ENABLE_CLASSIC 1394 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1395 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1396 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1397 break; 1398 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1399 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1400 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1401 break; 1402 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1403 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1404 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1405 break; 1406 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1407 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1408 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1409 break; 1410 case HCI_INIT_WRITE_LOCAL_NAME: { 1411 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1412 hci_reserve_packet_buffer(); 1413 uint8_t * packet = hci_stack->hci_packet_buffer; 1414 // construct HCI Command and send 1415 uint16_t opcode = hci_write_local_name.opcode; 1416 hci_stack->last_cmd_opcode = opcode; 1417 packet[0] = opcode & 0xff; 1418 packet[1] = opcode >> 8; 1419 packet[2] = DEVICE_NAME_LEN; 1420 memset(&packet[3], 0, DEVICE_NAME_LEN); 1421 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1422 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1423 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1424 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1425 // expand '00:00:00:00:00:00' in name with bd_addr 1426 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1427 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1428 break; 1429 } 1430 case HCI_INIT_WRITE_EIR_DATA: { 1431 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1432 hci_reserve_packet_buffer(); 1433 uint8_t * packet = hci_stack->hci_packet_buffer; 1434 // construct HCI Command in-place and send 1435 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1436 hci_stack->last_cmd_opcode = opcode; 1437 uint16_t offset = 0; 1438 packet[offset++] = opcode & 0xff; 1439 packet[offset++] = opcode >> 8; 1440 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1441 packet[offset++] = 0; // FEC not required 1442 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1443 if (hci_stack->eir_data){ 1444 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1445 ad_context_t context; 1446 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1447 uint8_t data_type = ad_iterator_get_data_type(&context); 1448 uint8_t size = ad_iterator_get_data_len(&context); 1449 const uint8_t *data = ad_iterator_get_data(&context); 1450 // copy item 1451 packet[offset++] = size + 1; 1452 packet[offset++] = data_type; 1453 memcpy(&packet[offset], data, size); 1454 // update name item 1455 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1456 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1457 } 1458 offset += size; 1459 } 1460 } else { 1461 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1462 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1463 packet[offset++] = bytes_to_copy + 1; 1464 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1465 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1466 // expand '00:00:00:00:00:00' in name with bd_addr 1467 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1468 } 1469 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 break; 1471 } 1472 case HCI_INIT_WRITE_INQUIRY_MODE: 1473 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1474 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1475 break; 1476 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1477 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1478 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1479 break; 1480 case HCI_INIT_WRITE_SCAN_ENABLE: 1481 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1482 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1483 break; 1484 // only sent if ENABLE_SCO_OVER_HCI is defined 1485 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1487 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1488 break; 1489 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1491 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1492 break; 1493 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1494 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1495 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1496 log_info("BCM: Route SCO data via HCI transport"); 1497 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1498 break; 1499 1500 #endif 1501 #ifdef ENABLE_BLE 1502 // LE INIT 1503 case HCI_INIT_LE_READ_BUFFER_SIZE: 1504 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1505 hci_send_cmd(&hci_le_read_buffer_size); 1506 break; 1507 case HCI_INIT_LE_SET_EVENT_MASK: 1508 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1509 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1510 break; 1511 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1512 // LE Supported Host = 1, Simultaneous Host = 0 1513 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1514 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1515 break; 1516 #endif 1517 1518 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1519 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1520 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1521 hci_send_cmd(&hci_le_read_maximum_data_length); 1522 break; 1523 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1524 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1525 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1526 break; 1527 #endif 1528 1529 #ifdef ENABLE_LE_CENTRAL 1530 case HCI_INIT_READ_WHITE_LIST_SIZE: 1531 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1532 hci_send_cmd(&hci_le_read_white_list_size); 1533 break; 1534 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1535 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1536 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); 1537 break; 1538 #endif 1539 default: 1540 return; 1541 } 1542 } 1543 1544 static void hci_init_done(void){ 1545 // done. tell the app 1546 log_info("hci_init_done -> HCI_STATE_WORKING"); 1547 hci_stack->state = HCI_STATE_WORKING; 1548 hci_emit_state(); 1549 hci_run(); 1550 } 1551 1552 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1553 bool command_completed = false; 1554 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1555 uint16_t opcode = little_endian_read_16(packet,3); 1556 if (opcode == hci_stack->last_cmd_opcode){ 1557 command_completed = true; 1558 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1559 } else { 1560 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1561 } 1562 } 1563 1564 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1565 uint8_t status = packet[2]; 1566 uint16_t opcode = little_endian_read_16(packet,4); 1567 if (opcode == hci_stack->last_cmd_opcode){ 1568 if (status){ 1569 command_completed = true; 1570 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1571 } else { 1572 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1573 } 1574 } else { 1575 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1576 } 1577 } 1578 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1579 // Vendor == CSR 1580 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1581 // TODO: track actual command 1582 command_completed = true; 1583 } 1584 1585 // Vendor == Toshiba 1586 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1587 // TODO: track actual command 1588 command_completed = true; 1589 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1590 hci_stack->num_cmd_packets = 1; 1591 } 1592 #endif 1593 1594 return command_completed; 1595 } 1596 1597 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1598 1599 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1600 1601 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1602 1603 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1604 1605 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1606 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1607 // 1608 // HCI Reset 1609 // Timeout 100 ms 1610 // HCI Reset 1611 // Command Complete Reset 1612 // HCI Read Local Version Information 1613 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1614 // hang... 1615 // 1616 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1617 if (!command_completed 1618 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1619 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1620 1621 uint16_t opcode = little_endian_read_16(packet,3); 1622 if (opcode == hci_reset.opcode){ 1623 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1624 return; 1625 } 1626 } 1627 1628 // CSR & H5 1629 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1630 if (!command_completed 1631 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1632 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1633 1634 uint16_t opcode = little_endian_read_16(packet,3); 1635 if (opcode == hci_reset.opcode){ 1636 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1637 return; 1638 } 1639 } 1640 1641 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1642 // fix: Correct substate and behave as command below 1643 if (command_completed){ 1644 switch (hci_stack->substate){ 1645 case HCI_INIT_SEND_RESET: 1646 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1647 break; 1648 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1649 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1650 break; 1651 default: 1652 break; 1653 } 1654 } 1655 1656 #endif 1657 1658 if (!command_completed) return; 1659 1660 bool need_baud_change = false; 1661 bool need_addr_change = false; 1662 1663 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1664 need_baud_change = hci_stack->config 1665 && hci_stack->chipset 1666 && hci_stack->chipset->set_baudrate_command 1667 && hci_stack->hci_transport->set_baudrate 1668 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1669 1670 need_addr_change = hci_stack->custom_bd_addr_set 1671 && hci_stack->chipset 1672 && hci_stack->chipset->set_bd_addr_command; 1673 #endif 1674 1675 switch(hci_stack->substate){ 1676 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 case HCI_INIT_SEND_RESET: 1679 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1680 // fix: just correct substate and behave as command below 1681 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1682 btstack_run_loop_remove_timer(&hci_stack->timeout); 1683 break; 1684 case HCI_INIT_W4_SEND_RESET: 1685 btstack_run_loop_remove_timer(&hci_stack->timeout); 1686 break; 1687 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1688 log_info("Received local name, need baud change %d", (int) need_baud_change); 1689 if (need_baud_change){ 1690 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1691 return; 1692 } 1693 // skip baud change 1694 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1695 return; 1696 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1697 // for STLC2500D, baud rate change already happened. 1698 // for others, baud rate gets changed now 1699 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1700 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1701 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1702 hci_stack->hci_transport->set_baudrate(baud_rate); 1703 } 1704 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1705 return; 1706 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1707 btstack_run_loop_remove_timer(&hci_stack->timeout); 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 case HCI_INIT_W4_CUSTOM_INIT: 1711 // repeat custom init 1712 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1713 return; 1714 #else 1715 case HCI_INIT_W4_SEND_RESET: 1716 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1717 return ; 1718 #endif 1719 1720 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1721 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1722 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1723 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1724 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1725 return; 1726 } 1727 if (need_addr_change){ 1728 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1729 return; 1730 } 1731 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1732 return; 1733 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1734 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1735 if (need_baud_change){ 1736 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1737 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1738 hci_stack->hci_transport->set_baudrate(baud_rate); 1739 } 1740 if (need_addr_change){ 1741 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1742 return; 1743 } 1744 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1745 return; 1746 case HCI_INIT_W4_SET_BD_ADDR: 1747 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1748 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1749 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1750 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1751 return; 1752 } 1753 // skipping st warm boot 1754 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1755 return; 1756 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1757 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1758 return; 1759 #endif 1760 case HCI_INIT_W4_READ_BD_ADDR: 1761 // only read buffer size if supported 1762 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1763 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1764 return; 1765 } 1766 // skipping read buffer size 1767 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1768 return; 1769 case HCI_INIT_W4_SET_EVENT_MASK: 1770 // skip Classic init commands for LE only chipsets 1771 if (!hci_classic_supported()){ 1772 #ifdef ENABLE_BLE 1773 if (hci_le_supported()){ 1774 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1775 return; 1776 } 1777 #endif 1778 log_error("Neither BR/EDR nor LE supported"); 1779 hci_init_done(); 1780 return; 1781 } 1782 if (!gap_ssp_supported()){ 1783 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1784 return; 1785 } 1786 break; 1787 #ifdef ENABLE_BLE 1788 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1789 // skip write le host if not supported (e.g. on LE only EM9301) 1790 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1791 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1792 return; 1793 1794 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1795 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1796 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1797 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1798 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1799 return; 1800 } 1801 // explicit fall through to reduce repetitions 1802 1803 #ifdef ENABLE_LE_CENTRAL 1804 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1805 #else 1806 hci_init_done(); 1807 #endif 1808 return; 1809 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1810 1811 #endif /* ENABLE_BLE */ 1812 1813 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1814 // skip write secure connections host support if not supported or disabled 1815 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1816 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1817 return; 1818 } 1819 break; 1820 1821 #ifdef ENABLE_SCO_OVER_HCI 1822 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1823 // skip write synchronous flow control if not supported 1824 if (hci_stack->local_supported_commands[0] & 0x04) break; 1825 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1826 1827 /* fall through */ 1828 1829 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1830 // skip write default erroneous data reporting if not supported 1831 if (hci_stack->local_supported_commands[0] & 0x08) break; 1832 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1833 1834 /* fall through */ 1835 1836 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1837 // skip bcm set sco pcm config on non-Broadcom chipsets 1838 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1839 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1844 if (!hci_le_supported()){ 1845 // SKIP LE init for Classic only configuration 1846 hci_init_done(); 1847 return; 1848 } 1849 break; 1850 1851 #else /* !ENABLE_SCO_OVER_HCI */ 1852 1853 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1854 #ifdef ENABLE_BLE 1855 if (hci_le_supported()){ 1856 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1857 return; 1858 } 1859 #endif 1860 // SKIP LE init for Classic only configuration 1861 hci_init_done(); 1862 return; 1863 #endif /* ENABLE_SCO_OVER_HCI */ 1864 1865 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1866 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1867 // Response to command before init done state -> init done 1868 case (HCI_INIT_DONE-1): 1869 hci_init_done(); 1870 return; 1871 #endif 1872 1873 default: 1874 break; 1875 } 1876 hci_initializing_next_state(); 1877 } 1878 1879 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1880 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1881 bd_addr_t bd_address; 1882 (void)memcpy(&bd_address, conn->address, 6); 1883 1884 #ifdef ENABLE_CLASSIC 1885 // cache needed data 1886 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1887 #endif 1888 1889 // connection failed, remove entry 1890 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1891 btstack_memory_hci_connection_free( conn ); 1892 1893 #ifdef ENABLE_CLASSIC 1894 // notify client if dedicated bonding 1895 if (notify_dedicated_bonding_failed){ 1896 log_info("hci notify_dedicated_bonding_failed"); 1897 hci_emit_dedicated_bonding_result(bd_address, status); 1898 } 1899 1900 // if authentication error, also delete link key 1901 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1902 gap_drop_link_key_for_bd_addr(bd_address); 1903 } 1904 #else 1905 UNUSED(status); 1906 #endif 1907 } 1908 1909 #ifdef ENABLE_CLASSIC 1910 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1911 // SSP Controller 1912 if (features[6] & (1 << 3)){ 1913 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1914 } 1915 // eSCO 1916 if (features[3] & (1<<7)){ 1917 conn->remote_supported_features[0] |= 1; 1918 } 1919 // Extended features 1920 if (features[7] & (1<<7)){ 1921 conn->remote_supported_features[0] |= 2; 1922 } 1923 } 1924 1925 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1926 // SSP Host 1927 if (features[0] & (1 << 0)){ 1928 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1929 } 1930 // SC Host 1931 if (features[0] & (1 << 3)){ 1932 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1933 } 1934 } 1935 1936 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1937 // SC Controller 1938 if (features[1] & (1 << 0)){ 1939 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1940 } 1941 } 1942 1943 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1944 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1945 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1946 if (conn->bonding_flags & BONDING_DEDICATED){ 1947 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1948 } 1949 } 1950 #endif 1951 1952 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1953 // handle BT initialization 1954 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1955 hci_initializing_event_handler(packet, size); 1956 } 1957 1958 // help with BT sleep 1959 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1960 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1961 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1962 hci_initializing_next_state(); 1963 } 1964 } 1965 1966 #ifdef ENABLE_CLASSIC 1967 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1968 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1969 conn->encryption_key_size = encryption_key_size; 1970 1971 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1972 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1973 return; 1974 } 1975 1976 // Request Authentication if not already done 1977 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1978 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1979 } 1980 #endif 1981 1982 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1983 UNUSED(size); 1984 1985 uint16_t manufacturer; 1986 #ifdef ENABLE_CLASSIC 1987 hci_con_handle_t handle; 1988 hci_connection_t * conn; 1989 uint8_t status; 1990 #endif 1991 // get num cmd packets - limit to 1 to reduce complexity 1992 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1993 1994 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1995 switch (opcode){ 1996 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1997 if (packet[5]) break; 1998 // terminate, name 248 chars 1999 packet[6+248] = 0; 2000 log_info("local name: %s", &packet[6]); 2001 break; 2002 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2003 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2004 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2005 uint16_t acl_len = little_endian_read_16(packet, 6); 2006 uint16_t sco_len = packet[8]; 2007 2008 // determine usable ACL/SCO payload size 2009 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2010 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2011 2012 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2013 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2014 2015 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2016 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2017 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2018 } 2019 break; 2020 case HCI_OPCODE_HCI_READ_RSSI: 2021 if (packet[5] == ERROR_CODE_SUCCESS){ 2022 uint8_t event[5]; 2023 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2024 event[1] = 3; 2025 (void)memcpy(&event[2], &packet[6], 3); 2026 hci_emit_event(event, sizeof(event), 1); 2027 } 2028 break; 2029 #ifdef ENABLE_BLE 2030 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2031 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2032 hci_stack->le_acl_packets_total_num = packet[8]; 2033 // determine usable ACL payload size 2034 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2035 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2036 } 2037 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2038 break; 2039 #endif 2040 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2041 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2042 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2043 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2044 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); 2045 break; 2046 #endif 2047 #ifdef ENABLE_LE_CENTRAL 2048 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2049 hci_stack->le_whitelist_capacity = packet[6]; 2050 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2051 break; 2052 #endif 2053 case HCI_OPCODE_HCI_READ_BD_ADDR: 2054 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2055 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)); 2056 #ifdef ENABLE_CLASSIC 2057 if (hci_stack->link_key_db){ 2058 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2059 } 2060 #endif 2061 break; 2062 #ifdef ENABLE_CLASSIC 2063 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2064 hci_emit_discoverable_enabled(hci_stack->discoverable); 2065 break; 2066 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2067 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2068 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2069 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2070 hci_emit_event(event, sizeof(event), 1); 2071 } 2072 break; 2073 #endif 2074 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2075 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2076 2077 #ifdef ENABLE_CLASSIC 2078 // determine usable ACL packet types based on host buffer size and supported features 2079 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2080 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2081 #endif 2082 // Classic/LE 2083 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2084 break; 2085 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2086 manufacturer = little_endian_read_16(packet, 10); 2087 // map Cypress to Broadcom 2088 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2089 log_info("Treat Cypress as Broadcom"); 2090 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2091 little_endian_store_16(packet, 10, manufacturer); 2092 } 2093 hci_stack->manufacturer = manufacturer; 2094 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2095 break; 2096 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2097 hci_stack->local_supported_commands[0] = 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2102 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2103 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2106 hci_stack->local_supported_commands[1] = 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2110 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2111 break; 2112 #ifdef ENABLE_CLASSIC 2113 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2114 if (packet[5]) return; 2115 hci_stack->synchronous_flow_control_enabled = 1; 2116 break; 2117 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2118 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2119 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2120 conn = hci_connection_for_handle(handle); 2121 if (conn != NULL) { 2122 uint8_t key_size = 0; 2123 if (status == 0){ 2124 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2125 log_info("Handle %04x key Size: %u", handle, key_size); 2126 } else { 2127 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2128 } 2129 hci_handle_read_encryption_key_size_complete(conn, key_size); 2130 } 2131 break; 2132 #endif 2133 default: 2134 break; 2135 } 2136 } 2137 2138 static void event_handler(uint8_t *packet, uint16_t size){ 2139 2140 uint16_t event_length = packet[1]; 2141 2142 // assert packet is complete 2143 if (size != (event_length + 2u)){ 2144 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2145 return; 2146 } 2147 2148 bd_addr_t addr; 2149 bd_addr_type_t addr_type; 2150 hci_con_handle_t handle; 2151 hci_connection_t * conn; 2152 int i; 2153 int create_connection_cmd; 2154 2155 #ifdef ENABLE_CLASSIC 2156 uint8_t link_type; 2157 #endif 2158 2159 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2160 2161 switch (hci_event_packet_get_type(packet)) { 2162 2163 case HCI_EVENT_COMMAND_COMPLETE: 2164 handle_command_complete_event(packet, size); 2165 break; 2166 2167 case HCI_EVENT_COMMAND_STATUS: 2168 // get num cmd packets - limit to 1 to reduce complexity 2169 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2170 2171 // check command status to detected failed outgoing connections 2172 create_connection_cmd = 0; 2173 #ifdef ENABLE_CLASSIC 2174 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2175 create_connection_cmd = 1; 2176 } 2177 #endif 2178 #ifdef ENABLE_LE_CENTRAL 2179 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2180 create_connection_cmd = 1; 2181 } 2182 #endif 2183 if (create_connection_cmd) { 2184 uint8_t status = hci_event_command_status_get_status(packet); 2185 addr_type = hci_stack->outgoing_addr_type; 2186 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2187 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); 2188 2189 // reset outgoing address info 2190 memset(hci_stack->outgoing_addr, 0, 6); 2191 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2192 2193 // on error 2194 if (status != ERROR_CODE_SUCCESS){ 2195 #ifdef ENABLE_LE_CENTRAL 2196 if (hci_is_le_connection_type(addr_type)){ 2197 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2198 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2199 } 2200 #endif 2201 // error => outgoing connection failed 2202 if (conn != NULL){ 2203 hci_handle_connection_failed(conn, status); 2204 } 2205 } 2206 } 2207 break; 2208 2209 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2210 if (size < 3) return; 2211 uint16_t num_handles = packet[2]; 2212 if (size != (3u + num_handles * 4u)) return; 2213 uint16_t offset = 3; 2214 for (i=0; i<num_handles;i++){ 2215 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2216 offset += 2u; 2217 uint16_t num_packets = little_endian_read_16(packet, offset); 2218 offset += 2u; 2219 2220 conn = hci_connection_for_handle(handle); 2221 if (!conn){ 2222 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2223 continue; 2224 } 2225 2226 if (conn->num_packets_sent >= num_packets){ 2227 conn->num_packets_sent -= num_packets; 2228 } else { 2229 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2230 conn->num_packets_sent = 0; 2231 } 2232 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2233 2234 #ifdef ENABLE_CLASSIC 2235 // For SCO, we do the can_send_now_check here 2236 hci_notify_if_sco_can_send_now(); 2237 #endif 2238 } 2239 break; 2240 } 2241 2242 #ifdef ENABLE_CLASSIC 2243 case HCI_EVENT_INQUIRY_COMPLETE: 2244 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2245 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2246 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2247 hci_emit_event(event, sizeof(event), 1); 2248 } 2249 break; 2250 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2251 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2252 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2253 } 2254 break; 2255 case HCI_EVENT_CONNECTION_REQUEST: 2256 reverse_bd_addr(&packet[2], addr); 2257 if (hci_stack->gap_classic_accept_callback != NULL){ 2258 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2259 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2260 bd_addr_copy(hci_stack->decline_addr, addr); 2261 break; 2262 } 2263 } 2264 2265 // TODO: eval COD 8-10 2266 link_type = packet[11]; 2267 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2268 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2269 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2270 if (!conn) { 2271 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2272 } 2273 if (!conn) { 2274 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2275 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2276 bd_addr_copy(hci_stack->decline_addr, addr); 2277 break; 2278 } 2279 conn->role = HCI_ROLE_SLAVE; 2280 conn->state = RECEIVED_CONNECTION_REQUEST; 2281 // store info about eSCO 2282 if (link_type == 0x02){ 2283 conn->remote_supported_features[0] |= 1; 2284 } 2285 hci_run(); 2286 break; 2287 2288 case HCI_EVENT_CONNECTION_COMPLETE: 2289 // Connection management 2290 reverse_bd_addr(&packet[5], addr); 2291 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2292 addr_type = BD_ADDR_TYPE_ACL; 2293 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2294 if (conn) { 2295 if (!packet[2]){ 2296 conn->state = OPEN; 2297 conn->con_handle = little_endian_read_16(packet, 3); 2298 2299 // queue get remote feature 2300 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2301 2302 // queue set supervision timeout if we're master 2303 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2304 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2305 } 2306 2307 // restart timer 2308 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2309 btstack_run_loop_add_timer(&conn->timeout); 2310 2311 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2312 2313 hci_emit_nr_connections_changed(); 2314 } else { 2315 // connection failed 2316 hci_handle_connection_failed(conn, packet[2]); 2317 } 2318 } 2319 break; 2320 2321 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2322 reverse_bd_addr(&packet[5], addr); 2323 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2324 if (packet[2]){ 2325 // connection failed 2326 break; 2327 } 2328 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2329 if (!conn) { 2330 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2331 } 2332 if (!conn) { 2333 break; 2334 } 2335 conn->state = OPEN; 2336 conn->con_handle = little_endian_read_16(packet, 3); 2337 2338 #ifdef ENABLE_SCO_OVER_HCI 2339 // update SCO 2340 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2341 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2342 } 2343 // trigger can send now 2344 if (hci_have_usb_transport()){ 2345 hci_stack->sco_can_send_now = 1; 2346 } 2347 #endif 2348 break; 2349 2350 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2351 handle = little_endian_read_16(packet, 3); 2352 conn = hci_connection_for_handle(handle); 2353 if (!conn) break; 2354 if (!packet[2]){ 2355 const uint8_t * features = &packet[5]; 2356 hci_handle_remote_features_page_0(conn, features); 2357 2358 // read extended features if possible 2359 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2360 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2361 break; 2362 } 2363 } 2364 hci_handle_remote_features_received(conn); 2365 break; 2366 2367 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2368 handle = little_endian_read_16(packet, 3); 2369 conn = hci_connection_for_handle(handle); 2370 if (!conn) break; 2371 // status = ok, page = 1 2372 if (!packet[2]) { 2373 uint8_t page_number = packet[5]; 2374 uint8_t maximum_page_number = packet[6]; 2375 const uint8_t * features = &packet[7]; 2376 bool done = false; 2377 switch (page_number){ 2378 case 1: 2379 hci_handle_remote_features_page_1(conn, features); 2380 if (maximum_page_number >= 2){ 2381 // get Secure Connections (Controller) from Page 2 if available 2382 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2383 } else { 2384 // otherwise, assume SC (Controller) == SC (Host) 2385 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2386 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2387 } 2388 done = true; 2389 } 2390 break; 2391 case 2: 2392 hci_handle_remote_features_page_2(conn, features); 2393 done = true; 2394 break; 2395 default: 2396 break; 2397 } 2398 if (!done) break; 2399 } 2400 hci_handle_remote_features_received(conn); 2401 break; 2402 2403 case HCI_EVENT_LINK_KEY_REQUEST: 2404 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2405 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2406 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2407 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2408 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2409 hci_run(); 2410 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2411 return; 2412 2413 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2414 reverse_bd_addr(&packet[2], addr); 2415 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2416 if (!conn) break; 2417 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2418 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2419 // Change Connection Encryption keeps link key type 2420 if (link_key_type != CHANGED_COMBINATION_KEY){ 2421 conn->link_key_type = link_key_type; 2422 } 2423 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2424 // still forward event to allow dismiss of pairing dialog 2425 break; 2426 } 2427 2428 case HCI_EVENT_PIN_CODE_REQUEST: 2429 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2430 // non-bondable mode: pin code negative reply will be sent 2431 if (!hci_stack->bondable){ 2432 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2433 hci_run(); 2434 return; 2435 } 2436 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2437 if (!hci_stack->link_key_db) break; 2438 hci_event_pin_code_request_get_bd_addr(packet, addr); 2439 hci_stack->link_key_db->delete_link_key(addr); 2440 break; 2441 2442 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2443 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2444 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2445 break; 2446 2447 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2448 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2449 if (!hci_stack->ssp_auto_accept) break; 2450 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2451 break; 2452 2453 case HCI_EVENT_USER_PASSKEY_REQUEST: 2454 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2455 if (!hci_stack->ssp_auto_accept) break; 2456 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2457 break; 2458 case HCI_EVENT_MODE_CHANGE: 2459 handle = hci_event_mode_change_get_handle(packet); 2460 conn = hci_connection_for_handle(handle); 2461 if (!conn) break; 2462 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2463 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2464 break; 2465 #endif 2466 2467 case HCI_EVENT_ENCRYPTION_CHANGE: 2468 handle = hci_event_encryption_change_get_connection_handle(packet); 2469 conn = hci_connection_for_handle(handle); 2470 if (!conn) break; 2471 if (hci_event_encryption_change_get_status(packet) == 0u) { 2472 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2473 if (encryption_enabled){ 2474 if (hci_is_le_connection(conn)){ 2475 // For LE, we accept connection as encrypted 2476 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2477 } 2478 #ifdef ENABLE_CLASSIC 2479 else { 2480 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2481 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2482 bool connected_uses_aes_ccm = encryption_enabled == 2; 2483 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2484 log_info("SC during pairing, but only E0 now -> abort"); 2485 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2486 break; 2487 } 2488 2489 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2490 if (connected_uses_aes_ccm){ 2491 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2492 } 2493 2494 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2495 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2496 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2497 } else { 2498 // if not, pretend everything is perfect 2499 hci_handle_read_encryption_key_size_complete(conn, 16); 2500 } 2501 } 2502 #endif 2503 } else { 2504 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2505 } 2506 } 2507 2508 break; 2509 2510 #ifdef ENABLE_CLASSIC 2511 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2512 handle = hci_event_authentication_complete_get_connection_handle(packet); 2513 conn = hci_connection_for_handle(handle); 2514 if (!conn) break; 2515 2516 // ignore authentication event if we didn't request it 2517 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2518 2519 // dedicated bonding: send result and disconnect 2520 if (conn->bonding_flags & BONDING_DEDICATED){ 2521 conn->bonding_flags &= ~BONDING_DEDICATED; 2522 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2523 conn->bonding_status = packet[2]; 2524 break; 2525 } 2526 2527 // authenticated only if auth status == 0 2528 if (hci_event_authentication_complete_get_status(packet) == 0){ 2529 // authenticated 2530 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2531 2532 // If link key sufficient for requested security and not already encrypted, start encryption 2533 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2534 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2535 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2536 break; 2537 } 2538 } 2539 2540 // emit updated security level 2541 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2542 break; 2543 #endif 2544 2545 // HCI_EVENT_DISCONNECTION_COMPLETE 2546 // has been split, to first notify stack before shutting connection down 2547 // see end of function, too. 2548 case HCI_EVENT_DISCONNECTION_COMPLETE: 2549 if (packet[2]) break; // status != 0 2550 handle = little_endian_read_16(packet, 3); 2551 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2552 if (hci_stack->acl_fragmentation_total_size > 0u) { 2553 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2554 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2555 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2556 hci_stack->acl_fragmentation_total_size = 0; 2557 hci_stack->acl_fragmentation_pos = 0; 2558 if (release_buffer){ 2559 hci_release_packet_buffer(); 2560 } 2561 } 2562 } 2563 2564 conn = hci_connection_for_handle(handle); 2565 if (!conn) break; 2566 // mark connection for shutdown 2567 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2568 2569 // emit dedicatd bonding event 2570 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2571 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2572 } 2573 2574 #ifdef ENABLE_BLE 2575 #ifdef ENABLE_LE_PERIPHERAL 2576 // re-enable advertisements for le connections if active 2577 if (hci_is_le_connection(conn)){ 2578 hci_update_advertisements_enabled_for_current_roles(); 2579 } 2580 #endif 2581 #endif 2582 break; 2583 2584 case HCI_EVENT_HARDWARE_ERROR: 2585 log_error("Hardware Error: 0x%02x", packet[2]); 2586 if (hci_stack->hardware_error_callback){ 2587 (*hci_stack->hardware_error_callback)(packet[2]); 2588 } else { 2589 // if no special requests, just reboot stack 2590 hci_power_control_off(); 2591 hci_power_control_on(); 2592 } 2593 break; 2594 2595 #ifdef ENABLE_CLASSIC 2596 case HCI_EVENT_ROLE_CHANGE: 2597 if (packet[2]) break; // status != 0 2598 reverse_bd_addr(&packet[3], addr); 2599 addr_type = BD_ADDR_TYPE_ACL; 2600 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2601 if (!conn) break; 2602 conn->role = packet[9]; 2603 break; 2604 #endif 2605 2606 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2607 // release packet buffer only for asynchronous transport and if there are not further fragements 2608 if (hci_transport_synchronous()) { 2609 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2610 return; // instead of break: to avoid re-entering hci_run() 2611 } 2612 hci_stack->acl_fragmentation_tx_active = 0; 2613 if (hci_stack->acl_fragmentation_total_size) break; 2614 hci_release_packet_buffer(); 2615 2616 // L2CAP receives this event via the hci_emit_event below 2617 2618 #ifdef ENABLE_CLASSIC 2619 // For SCO, we do the can_send_now_check here 2620 hci_notify_if_sco_can_send_now(); 2621 #endif 2622 break; 2623 2624 #ifdef ENABLE_CLASSIC 2625 case HCI_EVENT_SCO_CAN_SEND_NOW: 2626 // For SCO, we do the can_send_now_check here 2627 hci_stack->sco_can_send_now = 1; 2628 hci_notify_if_sco_can_send_now(); 2629 return; 2630 2631 // explode inquriy results for easier consumption 2632 case HCI_EVENT_INQUIRY_RESULT: 2633 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2634 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2635 gap_inquiry_explode(packet, size); 2636 break; 2637 #endif 2638 2639 #ifdef ENABLE_BLE 2640 case HCI_EVENT_LE_META: 2641 switch (packet[2]){ 2642 #ifdef ENABLE_LE_CENTRAL 2643 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2644 // log_info("advertising report received"); 2645 if (!hci_stack->le_scanning_enabled) break; 2646 le_handle_advertisement_report(packet, size); 2647 break; 2648 #endif 2649 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2650 // Connection management 2651 reverse_bd_addr(&packet[8], addr); 2652 addr_type = (bd_addr_type_t)packet[7]; 2653 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2654 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2655 2656 #ifdef ENABLE_LE_CENTRAL 2657 // handle error: error is reported only to the initiator -> outgoing connection 2658 if (packet[3]){ 2659 2660 // handle cancelled outgoing connection 2661 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2662 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2663 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2664 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2665 // whitelist connect 2666 if (hci_is_le_connection_type(addr_type)){ 2667 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2668 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2669 } 2670 // get outgoing connection conn struct for direct connect 2671 conn = gap_get_outgoing_connection(); 2672 } 2673 2674 // outgoing le connection establishment is done 2675 if (conn){ 2676 // remove entry 2677 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2678 btstack_memory_hci_connection_free( conn ); 2679 } 2680 break; 2681 } 2682 #endif 2683 2684 // on success, both hosts receive connection complete event 2685 if (packet[6] == HCI_ROLE_MASTER){ 2686 #ifdef ENABLE_LE_CENTRAL 2687 // if we're master on an le connection, it was an outgoing connection and we're done with it 2688 // note: no hci_connection_t object exists yet for connect with whitelist 2689 if (hci_is_le_connection_type(addr_type)){ 2690 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2691 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2692 } 2693 #endif 2694 } else { 2695 #ifdef ENABLE_LE_PERIPHERAL 2696 // if we're slave, it was an incoming connection, advertisements have stopped 2697 hci_stack->le_advertisements_active = false; 2698 #endif 2699 } 2700 // LE connections are auto-accepted, so just create a connection if there isn't one already 2701 if (!conn){ 2702 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2703 } 2704 // no memory, sorry. 2705 if (!conn){ 2706 break; 2707 } 2708 2709 conn->state = OPEN; 2710 conn->role = packet[6]; 2711 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2712 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2713 2714 #ifdef ENABLE_LE_PERIPHERAL 2715 if (packet[6] == HCI_ROLE_SLAVE){ 2716 hci_update_advertisements_enabled_for_current_roles(); 2717 } 2718 #endif 2719 2720 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2721 2722 // restart timer 2723 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2724 // btstack_run_loop_add_timer(&conn->timeout); 2725 2726 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2727 2728 hci_emit_nr_connections_changed(); 2729 break; 2730 2731 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2732 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2733 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2734 conn = hci_connection_for_handle(handle); 2735 if (!conn) break; 2736 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2737 break; 2738 2739 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2740 // connection 2741 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2742 conn = hci_connection_for_handle(handle); 2743 if (conn) { 2744 // read arguments 2745 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2746 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2747 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2748 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2749 2750 // validate against current connection parameter range 2751 le_connection_parameter_range_t existing_range; 2752 gap_get_connection_parameter_range(&existing_range); 2753 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2754 if (update_parameter){ 2755 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2756 conn->le_conn_interval_min = le_conn_interval_min; 2757 conn->le_conn_interval_max = le_conn_interval_max; 2758 conn->le_conn_latency = le_conn_latency; 2759 conn->le_supervision_timeout = le_supervision_timeout; 2760 } else { 2761 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2762 } 2763 } 2764 break; 2765 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2766 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2767 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2768 conn = hci_connection_for_handle(handle); 2769 if (conn) { 2770 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2771 } 2772 break; 2773 #endif 2774 default: 2775 break; 2776 } 2777 break; 2778 #endif 2779 case HCI_EVENT_VENDOR_SPECIFIC: 2780 // Vendor specific commands often create vendor specific event instead of num completed packets 2781 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2782 switch (hci_stack->manufacturer){ 2783 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2784 hci_stack->num_cmd_packets = 1; 2785 break; 2786 default: 2787 break; 2788 } 2789 break; 2790 default: 2791 break; 2792 } 2793 2794 handle_event_for_current_stack_state(packet, size); 2795 2796 // notify upper stack 2797 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2798 2799 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2800 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2801 handle = little_endian_read_16(packet, 3); 2802 hci_connection_t * aConn = hci_connection_for_handle(handle); 2803 // discard connection if app did not trigger a reconnect in the event handler 2804 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2805 hci_shutdown_connection(aConn); 2806 } 2807 } 2808 2809 // execute main loop 2810 hci_run(); 2811 } 2812 2813 #ifdef ENABLE_CLASSIC 2814 2815 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2816 static void sco_schedule_tx(hci_connection_t * conn); 2817 2818 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2819 log_debug("SCO TX Timeout"); 2820 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2821 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2822 if (!conn) return; 2823 2824 // trigger send 2825 conn->sco_tx_ready = 1; 2826 // extra packet if CVSD but SCO buffer is too short 2827 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2828 conn->sco_tx_ready++; 2829 } 2830 hci_notify_if_sco_can_send_now(); 2831 } 2832 2833 2834 #define SCO_TX_AFTER_RX_MS (6) 2835 2836 static void sco_schedule_tx(hci_connection_t * conn){ 2837 2838 uint32_t now = btstack_run_loop_get_time_ms(); 2839 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2840 int time_delta_ms = sco_tx_ms - now; 2841 2842 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2843 2844 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2845 btstack_run_loop_set_timer(timer, time_delta_ms); 2846 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2847 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2848 btstack_run_loop_add_timer(timer); 2849 } 2850 2851 static void sco_handler(uint8_t * packet, uint16_t size){ 2852 // lookup connection struct 2853 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2854 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2855 if (!conn) return; 2856 2857 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2858 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2859 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2860 packet[2] = 0x3c; 2861 memmove(&packet[3], &packet[23], 63); 2862 size = 63; 2863 } 2864 } 2865 2866 if (hci_have_usb_transport()){ 2867 // Nothing to do 2868 } else { 2869 // 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); 2870 if (hci_stack->synchronous_flow_control_enabled == 0){ 2871 uint32_t now = btstack_run_loop_get_time_ms(); 2872 2873 if (!conn->sco_rx_valid){ 2874 // ignore first 10 packets 2875 conn->sco_rx_count++; 2876 // log_debug("sco rx count %u", conn->sco_rx_count); 2877 if (conn->sco_rx_count == 10) { 2878 // use first timestamp as is and pretent it just started 2879 conn->sco_rx_ms = now; 2880 conn->sco_rx_valid = 1; 2881 conn->sco_rx_count = 0; 2882 sco_schedule_tx(conn); 2883 } 2884 } else { 2885 // track expected arrival timme 2886 conn->sco_rx_count++; 2887 conn->sco_rx_ms += 7; 2888 int delta = (int32_t) (now - conn->sco_rx_ms); 2889 if (delta > 0){ 2890 conn->sco_rx_ms++; 2891 } 2892 // log_debug("sco rx %u", conn->sco_rx_ms); 2893 sco_schedule_tx(conn); 2894 } 2895 } 2896 } 2897 // deliver to app 2898 if (hci_stack->sco_packet_handler) { 2899 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2900 } 2901 2902 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2903 conn->num_packets_completed++; 2904 hci_stack->host_completed_packets = 1; 2905 hci_run(); 2906 #endif 2907 } 2908 #endif 2909 2910 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2911 hci_dump_packet(packet_type, 1, packet, size); 2912 switch (packet_type) { 2913 case HCI_EVENT_PACKET: 2914 event_handler(packet, size); 2915 break; 2916 case HCI_ACL_DATA_PACKET: 2917 acl_handler(packet, size); 2918 break; 2919 #ifdef ENABLE_CLASSIC 2920 case HCI_SCO_DATA_PACKET: 2921 sco_handler(packet, size); 2922 break; 2923 #endif 2924 default: 2925 break; 2926 } 2927 } 2928 2929 /** 2930 * @brief Add event packet handler. 2931 */ 2932 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2933 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2934 } 2935 2936 2937 /** Register HCI packet handlers */ 2938 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2939 hci_stack->acl_packet_handler = handler; 2940 } 2941 2942 #ifdef ENABLE_CLASSIC 2943 /** 2944 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2945 */ 2946 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2947 hci_stack->sco_packet_handler = handler; 2948 } 2949 #endif 2950 2951 static void hci_state_reset(void){ 2952 // no connections yet 2953 hci_stack->connections = NULL; 2954 2955 // keep discoverable/connectable as this has been requested by the client(s) 2956 // hci_stack->discoverable = 0; 2957 // hci_stack->connectable = 0; 2958 // hci_stack->bondable = 1; 2959 // hci_stack->own_addr_type = 0; 2960 2961 // buffer is free 2962 hci_stack->hci_packet_buffer_reserved = 0; 2963 2964 // no pending cmds 2965 hci_stack->decline_reason = 0; 2966 hci_stack->new_scan_enable_value = 0xff; 2967 2968 // LE 2969 #ifdef ENABLE_BLE 2970 memset(hci_stack->le_random_address, 0, 6); 2971 hci_stack->le_random_address_set = 0; 2972 #endif 2973 #ifdef ENABLE_LE_CENTRAL 2974 hci_stack->le_scanning_active = 0; 2975 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2976 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2977 hci_stack->le_whitelist_capacity = 0; 2978 #endif 2979 } 2980 2981 #ifdef ENABLE_CLASSIC 2982 /** 2983 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2984 */ 2985 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2986 // store and open remote device db 2987 hci_stack->link_key_db = link_key_db; 2988 if (hci_stack->link_key_db) { 2989 hci_stack->link_key_db->open(); 2990 } 2991 } 2992 #endif 2993 2994 void hci_init(const hci_transport_t *transport, const void *config){ 2995 2996 #ifdef HAVE_MALLOC 2997 if (!hci_stack) { 2998 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2999 } 3000 #else 3001 hci_stack = &hci_stack_static; 3002 #endif 3003 memset(hci_stack, 0, sizeof(hci_stack_t)); 3004 3005 // reference to use transport layer implementation 3006 hci_stack->hci_transport = transport; 3007 3008 // reference to used config 3009 hci_stack->config = config; 3010 3011 // setup pointer for outgoing packet buffer 3012 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3013 3014 // max acl payload size defined in config.h 3015 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3016 3017 // register packet handlers with transport 3018 transport->register_packet_handler(&packet_handler); 3019 3020 hci_stack->state = HCI_STATE_OFF; 3021 3022 // class of device 3023 hci_stack->class_of_device = 0x007a020c; // Smartphone 3024 3025 // bondable by default 3026 hci_stack->bondable = 1; 3027 3028 #ifdef ENABLE_CLASSIC 3029 // classic name 3030 hci_stack->local_name = default_classic_name; 3031 3032 // Master slave policy 3033 hci_stack->master_slave_policy = 1; 3034 3035 // Allow Role Switch 3036 hci_stack->allow_role_switch = 1; 3037 3038 // Default / minimum security level = 2 3039 hci_stack->gap_security_level = LEVEL_2; 3040 3041 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3042 hci_stack->gap_required_encyrption_key_size = 7; 3043 #endif 3044 3045 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3046 hci_stack->ssp_enable = 1; 3047 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3048 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3049 hci_stack->ssp_auto_accept = 1; 3050 3051 // Secure Connections: enable (requires support from Controller) 3052 hci_stack->secure_connections_enable = true; 3053 3054 // voice setting - signed 16 bit pcm data with CVSD over the air 3055 hci_stack->sco_voice_setting = 0x60; 3056 3057 #ifdef ENABLE_LE_CENTRAL 3058 // connection parameter to use for outgoing connections 3059 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3060 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3061 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3062 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3063 hci_stack->le_connection_latency = 4; // 4 3064 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3065 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3066 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3067 3068 // default LE Scanning 3069 hci_stack->le_scan_type = 0x1; // active 3070 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3071 hci_stack->le_scan_window = 0x30; // 30 ms 3072 #endif 3073 3074 #ifdef ENABLE_LE_PERIPHERAL 3075 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3076 #endif 3077 3078 // connection parameter range used to answer connection parameter update requests in l2cap 3079 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3080 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3081 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3082 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3083 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3084 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3085 3086 hci_state_reset(); 3087 } 3088 3089 /** 3090 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3091 */ 3092 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3093 hci_stack->chipset = chipset_driver; 3094 3095 // reset chipset driver - init is also called on power_up 3096 if (hci_stack->chipset && hci_stack->chipset->init){ 3097 hci_stack->chipset->init(hci_stack->config); 3098 } 3099 } 3100 3101 /** 3102 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3103 */ 3104 void hci_set_control(const btstack_control_t *hardware_control){ 3105 // references to used control implementation 3106 hci_stack->control = hardware_control; 3107 // init with transport config 3108 hardware_control->init(hci_stack->config); 3109 } 3110 3111 void hci_close(void){ 3112 // close remote device db 3113 if (hci_stack->link_key_db) { 3114 hci_stack->link_key_db->close(); 3115 } 3116 3117 btstack_linked_list_iterator_t lit; 3118 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3119 while (btstack_linked_list_iterator_has_next(&lit)){ 3120 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3121 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3122 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3123 hci_shutdown_connection(connection); 3124 } 3125 3126 hci_power_control(HCI_POWER_OFF); 3127 3128 #ifdef HAVE_MALLOC 3129 free(hci_stack); 3130 #endif 3131 hci_stack = NULL; 3132 } 3133 3134 #ifdef ENABLE_CLASSIC 3135 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3136 // validate ranage and set 3137 if (encryption_key_size < 7) return; 3138 if (encryption_key_size > 16) return; 3139 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3140 } 3141 3142 void gap_set_security_level(gap_security_level_t security_level){ 3143 hci_stack->gap_security_level = security_level; 3144 } 3145 3146 gap_security_level_t gap_get_security_level(void){ 3147 return hci_stack->gap_security_level; 3148 } 3149 #endif 3150 3151 #ifdef ENABLE_CLASSIC 3152 void gap_set_class_of_device(uint32_t class_of_device){ 3153 hci_stack->class_of_device = class_of_device; 3154 } 3155 3156 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3157 hci_stack->default_link_policy_settings = default_link_policy_settings; 3158 } 3159 3160 void gap_set_allow_role_switch(bool allow_role_switch){ 3161 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3162 } 3163 3164 uint8_t hci_get_allow_role_switch(void){ 3165 return hci_stack->allow_role_switch; 3166 } 3167 3168 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3169 hci_stack->link_supervision_timeout = link_supervision_timeout; 3170 } 3171 3172 void hci_disable_l2cap_timeout_check(void){ 3173 disable_l2cap_timeouts = 1; 3174 } 3175 #endif 3176 3177 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3178 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3179 void hci_set_bd_addr(bd_addr_t addr){ 3180 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3181 hci_stack->custom_bd_addr_set = 1; 3182 } 3183 #endif 3184 3185 // State-Module-Driver overview 3186 // state module low-level 3187 // HCI_STATE_OFF off close 3188 // HCI_STATE_INITIALIZING, on open 3189 // HCI_STATE_WORKING, on open 3190 // HCI_STATE_HALTING, on open 3191 // HCI_STATE_SLEEPING, off/sleep close 3192 // HCI_STATE_FALLING_ASLEEP on open 3193 3194 static int hci_power_control_on(void){ 3195 3196 // power on 3197 int err = 0; 3198 if (hci_stack->control && hci_stack->control->on){ 3199 err = (*hci_stack->control->on)(); 3200 } 3201 if (err){ 3202 log_error( "POWER_ON failed"); 3203 hci_emit_hci_open_failed(); 3204 return err; 3205 } 3206 3207 // int chipset driver 3208 if (hci_stack->chipset && hci_stack->chipset->init){ 3209 hci_stack->chipset->init(hci_stack->config); 3210 } 3211 3212 // init transport 3213 if (hci_stack->hci_transport->init){ 3214 hci_stack->hci_transport->init(hci_stack->config); 3215 } 3216 3217 // open transport 3218 err = hci_stack->hci_transport->open(); 3219 if (err){ 3220 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3221 if (hci_stack->control && hci_stack->control->off){ 3222 (*hci_stack->control->off)(); 3223 } 3224 hci_emit_hci_open_failed(); 3225 return err; 3226 } 3227 return 0; 3228 } 3229 3230 static void hci_power_control_off(void){ 3231 3232 log_info("hci_power_control_off"); 3233 3234 // close low-level device 3235 hci_stack->hci_transport->close(); 3236 3237 log_info("hci_power_control_off - hci_transport closed"); 3238 3239 // power off 3240 if (hci_stack->control && hci_stack->control->off){ 3241 (*hci_stack->control->off)(); 3242 } 3243 3244 log_info("hci_power_control_off - control closed"); 3245 3246 hci_stack->state = HCI_STATE_OFF; 3247 } 3248 3249 static void hci_power_control_sleep(void){ 3250 3251 log_info("hci_power_control_sleep"); 3252 3253 #if 0 3254 // don't close serial port during sleep 3255 3256 // close low-level device 3257 hci_stack->hci_transport->close(hci_stack->config); 3258 #endif 3259 3260 // sleep mode 3261 if (hci_stack->control && hci_stack->control->sleep){ 3262 (*hci_stack->control->sleep)(); 3263 } 3264 3265 hci_stack->state = HCI_STATE_SLEEPING; 3266 } 3267 3268 static int hci_power_control_wake(void){ 3269 3270 log_info("hci_power_control_wake"); 3271 3272 // wake on 3273 if (hci_stack->control && hci_stack->control->wake){ 3274 (*hci_stack->control->wake)(); 3275 } 3276 3277 #if 0 3278 // open low-level device 3279 int err = hci_stack->hci_transport->open(hci_stack->config); 3280 if (err){ 3281 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3282 if (hci_stack->control && hci_stack->control->off){ 3283 (*hci_stack->control->off)(); 3284 } 3285 hci_emit_hci_open_failed(); 3286 return err; 3287 } 3288 #endif 3289 3290 return 0; 3291 } 3292 3293 static void hci_power_transition_to_initializing(void){ 3294 // set up state machine 3295 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3296 hci_stack->hci_packet_buffer_reserved = 0; 3297 hci_stack->state = HCI_STATE_INITIALIZING; 3298 hci_stack->substate = HCI_INIT_SEND_RESET; 3299 } 3300 3301 int hci_power_control(HCI_POWER_MODE power_mode){ 3302 3303 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3304 3305 int err = 0; 3306 switch (hci_stack->state){ 3307 3308 case HCI_STATE_OFF: 3309 switch (power_mode){ 3310 case HCI_POWER_ON: 3311 err = hci_power_control_on(); 3312 if (err) { 3313 log_error("hci_power_control_on() error %d", err); 3314 return err; 3315 } 3316 hci_power_transition_to_initializing(); 3317 break; 3318 case HCI_POWER_OFF: 3319 // do nothing 3320 break; 3321 case HCI_POWER_SLEEP: 3322 // do nothing (with SLEEP == OFF) 3323 break; 3324 } 3325 break; 3326 3327 case HCI_STATE_INITIALIZING: 3328 switch (power_mode){ 3329 case HCI_POWER_ON: 3330 // do nothing 3331 break; 3332 case HCI_POWER_OFF: 3333 // no connections yet, just turn it off 3334 hci_power_control_off(); 3335 break; 3336 case HCI_POWER_SLEEP: 3337 // no connections yet, just turn it off 3338 hci_power_control_sleep(); 3339 break; 3340 } 3341 break; 3342 3343 case HCI_STATE_WORKING: 3344 switch (power_mode){ 3345 case HCI_POWER_ON: 3346 // do nothing 3347 break; 3348 case HCI_POWER_OFF: 3349 // see hci_run 3350 hci_stack->state = HCI_STATE_HALTING; 3351 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3352 break; 3353 case HCI_POWER_SLEEP: 3354 // see hci_run 3355 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3356 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3357 break; 3358 } 3359 break; 3360 3361 case HCI_STATE_HALTING: 3362 switch (power_mode){ 3363 case HCI_POWER_ON: 3364 hci_power_transition_to_initializing(); 3365 break; 3366 case HCI_POWER_OFF: 3367 // do nothing 3368 break; 3369 case HCI_POWER_SLEEP: 3370 // see hci_run 3371 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3372 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3373 break; 3374 } 3375 break; 3376 3377 case HCI_STATE_FALLING_ASLEEP: 3378 switch (power_mode){ 3379 case HCI_POWER_ON: 3380 3381 #ifdef HAVE_PLATFORM_IPHONE_OS 3382 // nothing to do, if H4 supports power management 3383 if (btstack_control_iphone_power_management_enabled()){ 3384 hci_stack->state = HCI_STATE_INITIALIZING; 3385 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3386 break; 3387 } 3388 #endif 3389 hci_power_transition_to_initializing(); 3390 break; 3391 case HCI_POWER_OFF: 3392 // see hci_run 3393 hci_stack->state = HCI_STATE_HALTING; 3394 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3395 break; 3396 case HCI_POWER_SLEEP: 3397 // do nothing 3398 break; 3399 } 3400 break; 3401 3402 case HCI_STATE_SLEEPING: 3403 switch (power_mode){ 3404 case HCI_POWER_ON: 3405 3406 #ifdef HAVE_PLATFORM_IPHONE_OS 3407 // nothing to do, if H4 supports power management 3408 if (btstack_control_iphone_power_management_enabled()){ 3409 hci_stack->state = HCI_STATE_INITIALIZING; 3410 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3411 hci_update_scan_enable(); 3412 break; 3413 } 3414 #endif 3415 err = hci_power_control_wake(); 3416 if (err) return err; 3417 hci_power_transition_to_initializing(); 3418 break; 3419 case HCI_POWER_OFF: 3420 hci_stack->state = HCI_STATE_HALTING; 3421 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3422 break; 3423 case HCI_POWER_SLEEP: 3424 // do nothing 3425 break; 3426 } 3427 break; 3428 } 3429 3430 // create internal event 3431 hci_emit_state(); 3432 3433 // trigger next/first action 3434 hci_run(); 3435 3436 return 0; 3437 } 3438 3439 3440 #ifdef ENABLE_CLASSIC 3441 3442 static void hci_update_scan_enable(void){ 3443 // 2 = page scan, 1 = inq scan 3444 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3445 hci_run(); 3446 } 3447 3448 void gap_discoverable_control(uint8_t enable){ 3449 if (enable) enable = 1; // normalize argument 3450 3451 if (hci_stack->discoverable == enable){ 3452 hci_emit_discoverable_enabled(hci_stack->discoverable); 3453 return; 3454 } 3455 3456 hci_stack->discoverable = enable; 3457 hci_update_scan_enable(); 3458 } 3459 3460 void gap_connectable_control(uint8_t enable){ 3461 if (enable) enable = 1; // normalize argument 3462 3463 // don't emit event 3464 if (hci_stack->connectable == enable) return; 3465 3466 hci_stack->connectable = enable; 3467 hci_update_scan_enable(); 3468 } 3469 #endif 3470 3471 void gap_local_bd_addr(bd_addr_t address_buffer){ 3472 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3473 } 3474 3475 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3476 static void hci_host_num_completed_packets(void){ 3477 3478 // create packet manually as arrays are not supported and num_commands should not get reduced 3479 hci_reserve_packet_buffer(); 3480 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3481 3482 uint16_t size = 0; 3483 uint16_t num_handles = 0; 3484 packet[size++] = 0x35; 3485 packet[size++] = 0x0c; 3486 size++; // skip param len 3487 size++; // skip num handles 3488 3489 // add { handle, packets } entries 3490 btstack_linked_item_t * it; 3491 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3492 hci_connection_t * connection = (hci_connection_t *) it; 3493 if (connection->num_packets_completed){ 3494 little_endian_store_16(packet, size, connection->con_handle); 3495 size += 2; 3496 little_endian_store_16(packet, size, connection->num_packets_completed); 3497 size += 2; 3498 // 3499 num_handles++; 3500 connection->num_packets_completed = 0; 3501 } 3502 } 3503 3504 packet[2] = size - 3; 3505 packet[3] = num_handles; 3506 3507 hci_stack->host_completed_packets = 0; 3508 3509 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3510 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3511 3512 // release packet buffer for synchronous transport implementations 3513 if (hci_transport_synchronous()){ 3514 hci_release_packet_buffer(); 3515 hci_emit_transport_packet_sent(); 3516 } 3517 } 3518 #endif 3519 3520 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3521 UNUSED(ds); 3522 hci_stack->substate = HCI_HALTING_CLOSE; 3523 // allow packet handlers to defer final shutdown 3524 hci_emit_state(); 3525 hci_run(); 3526 } 3527 3528 static bool hci_run_acl_fragments(void){ 3529 if (hci_stack->acl_fragmentation_total_size > 0u) { 3530 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3531 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3532 if (connection) { 3533 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3534 hci_send_acl_packet_fragments(connection); 3535 return true; 3536 } 3537 } else { 3538 // connection gone -> discard further fragments 3539 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3540 hci_stack->acl_fragmentation_total_size = 0; 3541 hci_stack->acl_fragmentation_pos = 0; 3542 } 3543 } 3544 return false; 3545 } 3546 3547 #ifdef ENABLE_CLASSIC 3548 static bool hci_run_general_gap_classic(void){ 3549 3550 // decline incoming connections 3551 if (hci_stack->decline_reason){ 3552 uint8_t reason = hci_stack->decline_reason; 3553 hci_stack->decline_reason = 0; 3554 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3555 return true; 3556 } 3557 // send scan enable 3558 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3559 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3560 hci_stack->new_scan_enable_value = 0xff; 3561 return true; 3562 } 3563 // start/stop inquiry 3564 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3565 uint8_t duration = hci_stack->inquiry_state; 3566 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3567 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3568 return true; 3569 } 3570 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3571 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3572 hci_send_cmd(&hci_inquiry_cancel); 3573 return true; 3574 } 3575 // remote name request 3576 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3577 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3578 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3579 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3580 return true; 3581 } 3582 // pairing 3583 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3584 uint8_t state = hci_stack->gap_pairing_state; 3585 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3586 switch (state){ 3587 case GAP_PAIRING_STATE_SEND_PIN: 3588 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, hci_stack->gap_pairing_input.gap_pairing_pin); 3589 break; 3590 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3591 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3592 break; 3593 case GAP_PAIRING_STATE_SEND_PASSKEY: 3594 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3595 break; 3596 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3597 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3598 break; 3599 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3600 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3601 break; 3602 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3603 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3604 break; 3605 default: 3606 break; 3607 } 3608 return true; 3609 } 3610 return false; 3611 } 3612 #endif 3613 3614 #ifdef ENABLE_BLE 3615 static bool hci_run_general_gap_le(void){ 3616 3617 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3618 3619 if (hci_stack->state != HCI_STATE_WORKING) return false; 3620 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3621 3622 3623 // Phase 1: collect what to stop 3624 3625 bool scanning_stop = false; 3626 bool connecting_stop = false; 3627 bool advertising_stop = false; 3628 3629 #ifndef ENABLE_LE_CENTRAL 3630 UNUSED(scanning_stop); 3631 UNUSED(connecting_stop); 3632 #endif 3633 #ifndef ENABLE_LE_PERIPHERAL 3634 UNUSED(advertising_stop); 3635 #endif 3636 3637 // check if whitelist needs modification 3638 bool whitelist_modification_pending = false; 3639 btstack_linked_list_iterator_t lit; 3640 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3641 while (btstack_linked_list_iterator_has_next(&lit)){ 3642 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3643 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3644 whitelist_modification_pending = true; 3645 break; 3646 } 3647 } 3648 // check if resolving list needs modification 3649 bool resolving_list_modification_pending = false; 3650 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3651 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3652 resolving_list_modification_pending = true; 3653 } 3654 #endif 3655 3656 #ifdef ENABLE_LE_CENTRAL 3657 // scanning control 3658 if (hci_stack->le_scanning_active) { 3659 // stop if: 3660 // - parameter change required 3661 // - it's disabled 3662 // - whitelist change required but used for scanning 3663 // - resolving list modified 3664 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3665 if ((hci_stack->le_scanning_param_update) || 3666 !hci_stack->le_scanning_enabled || 3667 scanning_uses_whitelist || 3668 resolving_list_modification_pending){ 3669 3670 scanning_stop = true; 3671 } 3672 } 3673 #endif 3674 3675 #ifdef ENABLE_LE_CENTRAL 3676 // connecting control 3677 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3678 // stop connecting if: 3679 // - connecting uses white and whitelist modification pending 3680 // - if it got disabled 3681 // - resolving list modified 3682 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3683 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3684 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3685 resolving_list_modification_pending) { 3686 3687 connecting_stop = true; 3688 } 3689 } 3690 #endif 3691 3692 #ifdef ENABLE_LE_PERIPHERAL 3693 // le advertisement control 3694 if (hci_stack->le_advertisements_active){ 3695 // stop if: 3696 // - parameter change required 3697 // - it's disabled 3698 // - whitelist change required but used for advertisement filter policy 3699 // - resolving list modified 3700 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3701 if ((hci_stack->le_advertisements_todo != 0) || 3702 !hci_stack->le_advertisements_enabled_for_current_roles || 3703 (advertising_uses_whitelist & whitelist_modification_pending) || 3704 resolving_list_modification_pending) { 3705 3706 advertising_stop = true; 3707 } 3708 } 3709 #endif 3710 3711 3712 // Phase 2: stop everything that should be off during modifications 3713 3714 #ifdef ENABLE_LE_CENTRAL 3715 if (scanning_stop){ 3716 hci_stack->le_scanning_active = false; 3717 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3718 return true; 3719 } 3720 #endif 3721 3722 #ifdef ENABLE_LE_CENTRAL 3723 if (connecting_stop){ 3724 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3725 hci_send_cmd(&hci_le_create_connection_cancel); 3726 return true; 3727 } 3728 } 3729 #endif 3730 3731 #ifdef ENABLE_LE_PERIPHERAL 3732 if (advertising_stop){ 3733 hci_stack->le_advertisements_active = false; 3734 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3735 return true; 3736 } 3737 #endif 3738 3739 // Phase 3: modify 3740 3741 #ifdef ENABLE_LE_CENTRAL 3742 if (hci_stack->le_scanning_param_update){ 3743 hci_stack->le_scanning_param_update = false; 3744 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3745 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3746 return true; 3747 } 3748 #endif 3749 3750 #ifdef ENABLE_LE_PERIPHERAL 3751 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3752 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3753 hci_send_cmd(&hci_le_set_advertising_parameters, 3754 hci_stack->le_advertisements_interval_min, 3755 hci_stack->le_advertisements_interval_max, 3756 hci_stack->le_advertisements_type, 3757 hci_stack->le_own_addr_type, 3758 hci_stack->le_advertisements_direct_address_type, 3759 hci_stack->le_advertisements_direct_address, 3760 hci_stack->le_advertisements_channel_map, 3761 hci_stack->le_advertisements_filter_policy); 3762 return true; 3763 } 3764 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3765 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3766 uint8_t adv_data_clean[31]; 3767 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3768 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3769 hci_stack->le_advertisements_data_len); 3770 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3771 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3772 return true; 3773 } 3774 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3775 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3776 uint8_t scan_data_clean[31]; 3777 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3778 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3779 hci_stack->le_scan_response_data_len); 3780 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3781 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3782 return true; 3783 } 3784 #endif 3785 3786 3787 #ifdef ENABLE_LE_CENTRAL 3788 // if connect with whitelist was active and is not cancelled yet, wait until next time 3789 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3790 #endif 3791 3792 // LE Whitelist Management 3793 if (whitelist_modification_pending){ 3794 // add/remove entries 3795 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3796 while (btstack_linked_list_iterator_has_next(&lit)){ 3797 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3798 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3799 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3800 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3801 return true; 3802 } 3803 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3804 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3805 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3806 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3807 return true; 3808 } 3809 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3810 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3811 btstack_memory_whitelist_entry_free(entry); 3812 } 3813 } 3814 } 3815 3816 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3817 // LE Resolving List Management 3818 uint16_t i; 3819 switch (hci_stack->le_resolving_list_state){ 3820 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3821 // check if supported 3822 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0){ 3823 log_info("LE Address Resolution not supported"); 3824 break; 3825 } else { 3826 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3827 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3828 return true; 3829 } 3830 break; 3831 case LE_RESOLVING_LIST_READ_SIZE: 3832 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3833 hci_send_cmd(&hci_le_read_resolving_list_size); 3834 return true; 3835 case LE_RESOLVING_LIST_SEND_CLEAR: 3836 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3837 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, sizeof(hci_stack->le_resolving_list_add_entries)); 3838 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, sizeof(hci_stack->le_resolving_list_remove_entries)); 3839 hci_send_cmd(&hci_le_clear_resolving_list); 3840 return true; 3841 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3842 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3843 uint8_t offset = i >> 3; 3844 uint8_t mask = 1 << (i & 7); 3845 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3846 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3847 bd_addr_t peer_identity_addreses; 3848 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3849 sm_key_t peer_irk; 3850 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3851 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3852 3853 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3854 // trigger whitelist entry 'update' (work around for controller bug) 3855 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3856 while (btstack_linked_list_iterator_has_next(&lit)) { 3857 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3858 if (entry->address_type != peer_identity_addr_type) continue; 3859 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3860 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3861 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3862 } 3863 #endif 3864 3865 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, peer_identity_addreses); 3866 return true; 3867 } 3868 3869 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3870 3871 /* fall through */ 3872 3873 case LE_RESOLVING_LIST_ADD_ENTRIES: 3874 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3875 uint8_t offset = i >> 3; 3876 uint8_t mask = 1 << (i & 7); 3877 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3878 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3879 bd_addr_t peer_identity_addreses; 3880 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3881 sm_key_t peer_irk; 3882 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3883 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3884 const uint8_t * local_irk = gap_get_persistent_irk(); 3885 // command uses format specifier 'P' that stores 16-byte value without flip 3886 uint8_t local_irk_flipped[16]; 3887 uint8_t peer_irk_flipped[16]; 3888 reverse_128(local_irk, local_irk_flipped); 3889 reverse_128(peer_irk, peer_irk_flipped); 3890 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, peer_irk_flipped, local_irk_flipped); 3891 return true; 3892 } 3893 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3894 break; 3895 3896 default: 3897 break; 3898 } 3899 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3900 #endif 3901 3902 // Phase 4: restore state 3903 3904 #ifdef ENABLE_LE_CENTRAL 3905 // re-start scanning 3906 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3907 hci_stack->le_scanning_active = true; 3908 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3909 return true; 3910 } 3911 #endif 3912 3913 #ifdef ENABLE_LE_CENTRAL 3914 // re-start connecting 3915 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3916 bd_addr_t null_addr; 3917 memset(null_addr, 0, 6); 3918 hci_send_cmd(&hci_le_create_connection, 3919 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3920 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3921 1, // use whitelist 3922 0, // peer address type 3923 null_addr, // peer bd addr 3924 hci_stack->le_own_addr_type, // our addr type: 3925 hci_stack->le_connection_interval_min, // conn interval min 3926 hci_stack->le_connection_interval_max, // conn interval max 3927 hci_stack->le_connection_latency, // conn latency 3928 hci_stack->le_supervision_timeout, // conn latency 3929 hci_stack->le_minimum_ce_length, // min ce length 3930 hci_stack->le_maximum_ce_length // max ce length 3931 ); 3932 return true; 3933 } 3934 #endif 3935 3936 #ifdef ENABLE_LE_PERIPHERAL 3937 // re-start advertising 3938 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 3939 // check if advertisements should be enabled given 3940 hci_stack->le_advertisements_active = true; 3941 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3942 return true; 3943 } 3944 #endif 3945 3946 return false; 3947 } 3948 #endif 3949 3950 static bool hci_run_general_pending_commands(void){ 3951 btstack_linked_item_t * it; 3952 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3953 hci_connection_t * connection = (hci_connection_t *) it; 3954 3955 switch(connection->state){ 3956 case SEND_CREATE_CONNECTION: 3957 switch(connection->address_type){ 3958 #ifdef ENABLE_CLASSIC 3959 case BD_ADDR_TYPE_ACL: 3960 log_info("sending hci_create_connection"); 3961 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3962 break; 3963 #endif 3964 default: 3965 #ifdef ENABLE_BLE 3966 #ifdef ENABLE_LE_CENTRAL 3967 log_info("sending hci_le_create_connection"); 3968 hci_send_cmd(&hci_le_create_connection, 3969 hci_stack->le_connection_scan_interval, // conn scan interval 3970 hci_stack->le_connection_scan_window, // conn scan windows 3971 0, // don't use whitelist 3972 connection->address_type, // peer address type 3973 connection->address, // peer bd addr 3974 hci_stack->le_own_addr_type, // our addr type: 3975 hci_stack->le_connection_interval_min, // conn interval min 3976 hci_stack->le_connection_interval_max, // conn interval max 3977 hci_stack->le_connection_latency, // conn latency 3978 hci_stack->le_supervision_timeout, // conn latency 3979 hci_stack->le_minimum_ce_length, // min ce length 3980 hci_stack->le_maximum_ce_length // max ce length 3981 ); 3982 connection->state = SENT_CREATE_CONNECTION; 3983 #endif 3984 #endif 3985 break; 3986 } 3987 return true; 3988 3989 #ifdef ENABLE_CLASSIC 3990 case RECEIVED_CONNECTION_REQUEST: 3991 connection->role = HCI_ROLE_SLAVE; 3992 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3993 log_info("sending hci_accept_connection_request"); 3994 connection->state = ACCEPTED_CONNECTION_REQUEST; 3995 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3996 } 3997 return true; 3998 #endif 3999 4000 #ifdef ENABLE_BLE 4001 #ifdef ENABLE_LE_CENTRAL 4002 case SEND_CANCEL_CONNECTION: 4003 connection->state = SENT_CANCEL_CONNECTION; 4004 hci_send_cmd(&hci_le_create_connection_cancel); 4005 return true; 4006 #endif 4007 #endif 4008 case SEND_DISCONNECT: 4009 connection->state = SENT_DISCONNECT; 4010 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4011 return true; 4012 4013 default: 4014 break; 4015 } 4016 4017 // no further commands if connection is about to get shut down 4018 if (connection->state == SENT_DISCONNECT) continue; 4019 4020 if (connection->authentication_flags & READ_RSSI){ 4021 connectionClearAuthenticationFlags(connection, READ_RSSI); 4022 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4023 return true; 4024 } 4025 4026 #ifdef ENABLE_CLASSIC 4027 4028 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4029 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4030 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4031 return true; 4032 } 4033 4034 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4035 log_info("responding to link key request"); 4036 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4037 4038 link_key_t link_key; 4039 link_key_type_t link_key_type; 4040 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4041 4042 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4043 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4044 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4045 if (sc_downgrade){ 4046 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4047 connection->state = SENT_DISCONNECT; 4048 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4049 return true; 4050 } 4051 4052 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4053 if (have_link_key && security_level_sufficient){ 4054 connection->link_key_type = link_key_type; 4055 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4056 } else { 4057 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4058 } 4059 return true; 4060 } 4061 4062 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4063 log_info("denying to pin request"); 4064 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4065 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4066 return true; 4067 } 4068 4069 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4070 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4071 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4072 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4073 // tweak authentication requirements 4074 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4075 if (connection->bonding_flags & BONDING_DEDICATED){ 4076 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4077 } 4078 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4079 authreq |= 1; 4080 } 4081 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4082 } else { 4083 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4084 } 4085 return true; 4086 } 4087 4088 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4089 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4090 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4091 return true; 4092 } 4093 4094 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4095 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4096 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4097 return true; 4098 } 4099 4100 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4101 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4102 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4103 return true; 4104 } 4105 4106 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4107 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4108 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4109 return true; 4110 } 4111 4112 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4113 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4114 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4115 return true; 4116 } 4117 4118 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4119 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4120 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4121 connection->state = SENT_DISCONNECT; 4122 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4123 return true; 4124 } 4125 4126 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4127 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4128 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4129 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4130 return true; 4131 } 4132 4133 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4134 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4135 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4136 return true; 4137 } 4138 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4139 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4140 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4141 return true; 4142 } 4143 #endif 4144 4145 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4146 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4147 if (connection->state != SENT_DISCONNECT){ 4148 connection->state = SENT_DISCONNECT; 4149 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4150 return true; 4151 } 4152 } 4153 4154 #ifdef ENABLE_CLASSIC 4155 uint16_t sniff_min_interval; 4156 switch (connection->sniff_min_interval){ 4157 case 0: 4158 break; 4159 case 0xffff: 4160 connection->sniff_min_interval = 0; 4161 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4162 return true; 4163 default: 4164 sniff_min_interval = connection->sniff_min_interval; 4165 connection->sniff_min_interval = 0; 4166 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4167 return true; 4168 } 4169 4170 if (connection->request_role != HCI_ROLE_INVALID){ 4171 hci_role_t role = connection->request_role; 4172 connection->request_role = HCI_ROLE_INVALID; 4173 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4174 return true; 4175 } 4176 #endif 4177 4178 #ifdef ENABLE_BLE 4179 switch (connection->le_con_parameter_update_state){ 4180 // response to L2CAP CON PARAMETER UPDATE REQUEST 4181 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4182 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4183 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4184 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4185 0x0000, 0xffff); 4186 return true; 4187 case CON_PARAMETER_UPDATE_REPLY: 4188 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4189 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4190 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4191 0x0000, 0xffff); 4192 return true; 4193 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4194 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4195 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4196 return true; 4197 default: 4198 break; 4199 } 4200 if (connection->le_phy_update_all_phys != 0xffu){ 4201 uint8_t all_phys = connection->le_phy_update_all_phys; 4202 connection->le_phy_update_all_phys = 0xff; 4203 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); 4204 return true; 4205 } 4206 #endif 4207 } 4208 return false; 4209 } 4210 4211 static void hci_run(void){ 4212 4213 bool done; 4214 4215 // send continuation fragments first, as they block the prepared packet buffer 4216 done = hci_run_acl_fragments(); 4217 if (done) return; 4218 4219 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4220 // send host num completed packets next as they don't require num_cmd_packets > 0 4221 if (!hci_can_send_comand_packet_transport()) return; 4222 if (hci_stack->host_completed_packets){ 4223 hci_host_num_completed_packets(); 4224 return; 4225 } 4226 #endif 4227 4228 if (!hci_can_send_command_packet_now()) return; 4229 4230 // global/non-connection oriented commands 4231 4232 4233 #ifdef ENABLE_CLASSIC 4234 // general gap classic 4235 done = hci_run_general_gap_classic(); 4236 if (done) return; 4237 #endif 4238 4239 #ifdef ENABLE_BLE 4240 // general gap le 4241 done = hci_run_general_gap_le(); 4242 if (done) return; 4243 #endif 4244 4245 // send pending HCI commands 4246 done = hci_run_general_pending_commands(); 4247 if (done) return; 4248 4249 // stack state sub statemachines 4250 hci_connection_t * connection; 4251 switch (hci_stack->state){ 4252 case HCI_STATE_INITIALIZING: 4253 hci_initializing_run(); 4254 break; 4255 4256 case HCI_STATE_HALTING: 4257 4258 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4259 switch (hci_stack->substate){ 4260 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4261 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4262 4263 #ifdef ENABLE_BLE 4264 #ifdef ENABLE_LE_CENTRAL 4265 // free whitelist entries 4266 { 4267 btstack_linked_list_iterator_t lit; 4268 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4269 while (btstack_linked_list_iterator_has_next(&lit)){ 4270 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4271 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4272 btstack_memory_whitelist_entry_free(entry); 4273 } 4274 } 4275 #endif 4276 #endif 4277 // close all open connections 4278 connection = (hci_connection_t *) hci_stack->connections; 4279 if (connection){ 4280 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4281 if (!hci_can_send_command_packet_now()) return; 4282 4283 // check state 4284 if (connection->state == SENT_DISCONNECT) return; 4285 connection->state = SENT_DISCONNECT; 4286 4287 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4288 4289 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4290 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4291 4292 // ... which would be ignored anyway as we shutdown (free) the connection now 4293 hci_shutdown_connection(connection); 4294 4295 // finally, send the disconnect command 4296 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4297 return; 4298 } 4299 4300 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4301 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4302 log_info("HCI_STATE_HALTING: wait 50 ms"); 4303 hci_stack->substate = HCI_HALTING_W4_TIMER; 4304 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4305 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4306 btstack_run_loop_add_timer(&hci_stack->timeout); 4307 break; 4308 } 4309 4310 /* fall through */ 4311 4312 case HCI_HALTING_CLOSE: 4313 log_info("HCI_STATE_HALTING, calling off"); 4314 4315 // switch mode 4316 hci_power_control_off(); 4317 4318 log_info("HCI_STATE_HALTING, emitting state"); 4319 hci_emit_state(); 4320 log_info("HCI_STATE_HALTING, done"); 4321 break; 4322 4323 case HCI_HALTING_W4_TIMER: 4324 // keep waiting 4325 4326 break; 4327 default: 4328 break; 4329 } 4330 4331 break; 4332 4333 case HCI_STATE_FALLING_ASLEEP: 4334 switch(hci_stack->substate) { 4335 case HCI_FALLING_ASLEEP_DISCONNECT: 4336 log_info("HCI_STATE_FALLING_ASLEEP"); 4337 // close all open connections 4338 connection = (hci_connection_t *) hci_stack->connections; 4339 4340 #ifdef HAVE_PLATFORM_IPHONE_OS 4341 // don't close connections, if H4 supports power management 4342 if (btstack_control_iphone_power_management_enabled()){ 4343 connection = NULL; 4344 } 4345 #endif 4346 if (connection){ 4347 4348 // send disconnect 4349 if (!hci_can_send_command_packet_now()) return; 4350 4351 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4352 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4353 4354 // send disconnected event right away - causes higher layer connections to get closed, too. 4355 hci_shutdown_connection(connection); 4356 return; 4357 } 4358 4359 if (hci_classic_supported()){ 4360 // disable page and inquiry scan 4361 if (!hci_can_send_command_packet_now()) return; 4362 4363 log_info("HCI_STATE_HALTING, disabling inq scans"); 4364 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4365 4366 // continue in next sub state 4367 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4368 break; 4369 } 4370 4371 /* fall through */ 4372 4373 case HCI_FALLING_ASLEEP_COMPLETE: 4374 log_info("HCI_STATE_HALTING, calling sleep"); 4375 #ifdef HAVE_PLATFORM_IPHONE_OS 4376 // don't actually go to sleep, if H4 supports power management 4377 if (btstack_control_iphone_power_management_enabled()){ 4378 // SLEEP MODE reached 4379 hci_stack->state = HCI_STATE_SLEEPING; 4380 hci_emit_state(); 4381 break; 4382 } 4383 #endif 4384 // switch mode 4385 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4386 hci_emit_state(); 4387 break; 4388 4389 default: 4390 break; 4391 } 4392 break; 4393 4394 default: 4395 break; 4396 } 4397 } 4398 4399 int hci_send_cmd_packet(uint8_t *packet, int size){ 4400 // house-keeping 4401 4402 #ifdef ENABLE_CLASSIC 4403 bd_addr_t addr; 4404 hci_connection_t * conn; 4405 #endif 4406 #ifdef ENABLE_LE_CENTRAL 4407 uint8_t initiator_filter_policy; 4408 #endif 4409 4410 uint16_t opcode = little_endian_read_16(packet, 0); 4411 switch (opcode) { 4412 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4413 hci_stack->loopback_mode = packet[3]; 4414 break; 4415 4416 #ifdef ENABLE_CLASSIC 4417 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4418 reverse_bd_addr(&packet[3], addr); 4419 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4420 4421 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4422 if (!conn) { 4423 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4424 if (!conn) { 4425 // notify client that alloc failed 4426 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4427 return -1; // packet not sent to controller 4428 } 4429 conn->state = SEND_CREATE_CONNECTION; 4430 conn->role = HCI_ROLE_MASTER; 4431 } 4432 log_info("conn state %u", conn->state); 4433 switch (conn->state) { 4434 // if connection active exists 4435 case OPEN: 4436 // and OPEN, emit connection complete command 4437 hci_emit_connection_complete(addr, conn->con_handle, 0); 4438 return -1; // packet not sent to controller 4439 case RECEIVED_DISCONNECTION_COMPLETE: 4440 // create connection triggered in disconnect complete event, let's do it now 4441 break; 4442 case SEND_CREATE_CONNECTION: 4443 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4444 break; 4445 default: 4446 // otherwise, just ignore as it is already in the open process 4447 return -1; // packet not sent to controller 4448 } 4449 conn->state = SENT_CREATE_CONNECTION; 4450 4451 // track outgoing connection 4452 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4453 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4454 break; 4455 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4456 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4457 break; 4458 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4459 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4460 break; 4461 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4462 if (hci_stack->link_key_db) { 4463 reverse_bd_addr(&packet[3], addr); 4464 hci_stack->link_key_db->delete_link_key(addr); 4465 } 4466 break; 4467 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4468 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4469 reverse_bd_addr(&packet[3], addr); 4470 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4471 if (conn) { 4472 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4473 } 4474 break; 4475 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4476 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4477 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4478 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4479 reverse_bd_addr(&packet[3], addr); 4480 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4481 if (conn) { 4482 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4483 } 4484 break; 4485 4486 #ifdef ENABLE_SCO_OVER_HCI 4487 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4488 // setup_synchronous_connection? Voice setting at offset 22 4489 // TODO: compare to current setting if sco connection already active 4490 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4491 break; 4492 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4493 // accept_synchronus_connection? Voice setting at offset 18 4494 // TODO: compare to current setting if sco connection already active 4495 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4496 break; 4497 #endif 4498 #endif 4499 4500 #ifdef ENABLE_BLE 4501 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4502 hci_stack->le_random_address_set = 1; 4503 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4504 break; 4505 #ifdef ENABLE_LE_PERIPHERAL 4506 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4507 hci_stack->le_advertisements_active = packet[3] != 0; 4508 break; 4509 #endif 4510 #ifdef ENABLE_LE_CENTRAL 4511 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4512 // white list used? 4513 initiator_filter_policy = packet[7]; 4514 switch (initiator_filter_policy) { 4515 case 0: 4516 // whitelist not used 4517 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4518 break; 4519 case 1: 4520 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4521 break; 4522 default: 4523 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4524 break; 4525 } 4526 // track outgoing connection 4527 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4528 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4529 break; 4530 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4531 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4532 break; 4533 #endif 4534 #endif 4535 default: 4536 break; 4537 } 4538 4539 hci_stack->num_cmd_packets--; 4540 4541 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4542 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4543 } 4544 4545 // disconnect because of security block 4546 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4547 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4548 if (!connection) return; 4549 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4550 } 4551 4552 4553 // Configure Secure Simple Pairing 4554 4555 #ifdef ENABLE_CLASSIC 4556 4557 // enable will enable SSP during init 4558 void gap_ssp_set_enable(int enable){ 4559 hci_stack->ssp_enable = enable; 4560 } 4561 4562 static int hci_local_ssp_activated(void){ 4563 return gap_ssp_supported() && hci_stack->ssp_enable; 4564 } 4565 4566 // if set, BTstack will respond to io capability request using authentication requirement 4567 void gap_ssp_set_io_capability(int io_capability){ 4568 hci_stack->ssp_io_capability = io_capability; 4569 } 4570 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4571 hci_stack->ssp_authentication_requirement = authentication_requirement; 4572 } 4573 4574 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4575 void gap_ssp_set_auto_accept(int auto_accept){ 4576 hci_stack->ssp_auto_accept = auto_accept; 4577 } 4578 4579 void gap_secure_connections_enable(bool enable){ 4580 hci_stack->secure_connections_enable = enable; 4581 } 4582 4583 #endif 4584 4585 // va_list part of hci_send_cmd 4586 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4587 if (!hci_can_send_command_packet_now()){ 4588 log_error("hci_send_cmd called but cannot send packet now"); 4589 return 0; 4590 } 4591 4592 // for HCI INITIALIZATION 4593 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4594 hci_stack->last_cmd_opcode = cmd->opcode; 4595 4596 hci_reserve_packet_buffer(); 4597 uint8_t * packet = hci_stack->hci_packet_buffer; 4598 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4599 int err = hci_send_cmd_packet(packet, size); 4600 4601 // release packet buffer on error or for synchronous transport implementations 4602 if ((err < 0) || hci_transport_synchronous()){ 4603 hci_release_packet_buffer(); 4604 hci_emit_transport_packet_sent(); 4605 } 4606 4607 return err; 4608 } 4609 4610 /** 4611 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4612 */ 4613 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4614 va_list argptr; 4615 va_start(argptr, cmd); 4616 int res = hci_send_cmd_va_arg(cmd, argptr); 4617 va_end(argptr); 4618 return res; 4619 } 4620 4621 // Create various non-HCI events. 4622 // TODO: generalize, use table similar to hci_create_command 4623 4624 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4625 // dump packet 4626 if (dump) { 4627 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4628 } 4629 4630 // dispatch to all event handlers 4631 btstack_linked_list_iterator_t it; 4632 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4633 while (btstack_linked_list_iterator_has_next(&it)){ 4634 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4635 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4636 } 4637 } 4638 4639 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4640 if (!hci_stack->acl_packet_handler) return; 4641 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4642 } 4643 4644 #ifdef ENABLE_CLASSIC 4645 static void hci_notify_if_sco_can_send_now(void){ 4646 // notify SCO sender if waiting 4647 if (!hci_stack->sco_waiting_for_can_send_now) return; 4648 if (hci_can_send_sco_packet_now()){ 4649 hci_stack->sco_waiting_for_can_send_now = 0; 4650 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4651 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4652 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4653 } 4654 } 4655 4656 // parsing end emitting has been merged to reduce code size 4657 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4658 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4659 4660 uint8_t * eir_data; 4661 ad_context_t context; 4662 const uint8_t * name; 4663 uint8_t name_len; 4664 4665 if (size < 3) return; 4666 4667 int event_type = hci_event_packet_get_type(packet); 4668 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4669 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4670 4671 switch (event_type){ 4672 case HCI_EVENT_INQUIRY_RESULT: 4673 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4674 if (size != (3 + (num_responses * 14))) return; 4675 break; 4676 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4677 if (size != 257) return; 4678 if (num_responses != 1) return; 4679 break; 4680 default: 4681 return; 4682 } 4683 4684 // event[1] is set at the end 4685 int i; 4686 for (i=0; i<num_responses;i++){ 4687 memset(event, 0, sizeof(event)); 4688 event[0] = GAP_EVENT_INQUIRY_RESULT; 4689 uint8_t event_size = 18; // if name is not set by EIR 4690 4691 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4692 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4693 (void)memcpy(&event[9], 4694 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4695 3); // class of device 4696 (void)memcpy(&event[12], 4697 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4698 2); // clock offset 4699 4700 switch (event_type){ 4701 case HCI_EVENT_INQUIRY_RESULT: 4702 // 14,15,16,17 = 0, size 18 4703 break; 4704 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4705 event[14] = 1; 4706 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4707 // 16,17 = 0, size 18 4708 break; 4709 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4710 event[14] = 1; 4711 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4712 // EIR packets only contain a single inquiry response 4713 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4714 name = NULL; 4715 // Iterate over EIR data 4716 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4717 uint8_t data_type = ad_iterator_get_data_type(&context); 4718 uint8_t data_size = ad_iterator_get_data_len(&context); 4719 const uint8_t * data = ad_iterator_get_data(&context); 4720 // Prefer Complete Local Name over Shortend Local Name 4721 switch (data_type){ 4722 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4723 if (name) continue; 4724 /* fall through */ 4725 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4726 name = data; 4727 name_len = data_size; 4728 break; 4729 default: 4730 break; 4731 } 4732 } 4733 if (name){ 4734 event[16] = 1; 4735 // truncate name if needed 4736 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4737 event[17] = len; 4738 (void)memcpy(&event[18], name, len); 4739 event_size += len; 4740 } 4741 break; 4742 } 4743 event[1] = event_size - 2; 4744 hci_emit_event(event, event_size, 1); 4745 } 4746 } 4747 #endif 4748 4749 void hci_emit_state(void){ 4750 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4751 uint8_t event[3]; 4752 event[0] = BTSTACK_EVENT_STATE; 4753 event[1] = sizeof(event) - 2u; 4754 event[2] = hci_stack->state; 4755 hci_emit_event(event, sizeof(event), 1); 4756 } 4757 4758 #ifdef ENABLE_CLASSIC 4759 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4760 uint8_t event[13]; 4761 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4762 event[1] = sizeof(event) - 2; 4763 event[2] = status; 4764 little_endian_store_16(event, 3, con_handle); 4765 reverse_bd_addr(address, &event[5]); 4766 event[11] = 1; // ACL connection 4767 event[12] = 0; // encryption disabled 4768 hci_emit_event(event, sizeof(event), 1); 4769 } 4770 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4771 if (disable_l2cap_timeouts) return; 4772 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4773 uint8_t event[4]; 4774 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4775 event[1] = sizeof(event) - 2; 4776 little_endian_store_16(event, 2, conn->con_handle); 4777 hci_emit_event(event, sizeof(event), 1); 4778 } 4779 #endif 4780 4781 #ifdef ENABLE_BLE 4782 #ifdef ENABLE_LE_CENTRAL 4783 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){ 4784 uint8_t event[21]; 4785 event[0] = HCI_EVENT_LE_META; 4786 event[1] = sizeof(event) - 2u; 4787 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4788 event[3] = status; 4789 little_endian_store_16(event, 4, con_handle); 4790 event[6] = 0; // TODO: role 4791 event[7] = address_type; 4792 reverse_bd_addr(address, &event[8]); 4793 little_endian_store_16(event, 14, 0); // interval 4794 little_endian_store_16(event, 16, 0); // latency 4795 little_endian_store_16(event, 18, 0); // supervision timeout 4796 event[20] = 0; // master clock accuracy 4797 hci_emit_event(event, sizeof(event), 1); 4798 } 4799 #endif 4800 #endif 4801 4802 static void hci_emit_transport_packet_sent(void){ 4803 // notify upper stack that it might be possible to send again 4804 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4805 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4806 } 4807 4808 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4809 uint8_t event[6]; 4810 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4811 event[1] = sizeof(event) - 2u; 4812 event[2] = 0; // status = OK 4813 little_endian_store_16(event, 3, con_handle); 4814 event[5] = reason; 4815 hci_emit_event(event, sizeof(event), 1); 4816 } 4817 4818 static void hci_emit_nr_connections_changed(void){ 4819 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4820 uint8_t event[3]; 4821 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4822 event[1] = sizeof(event) - 2u; 4823 event[2] = nr_hci_connections(); 4824 hci_emit_event(event, sizeof(event), 1); 4825 } 4826 4827 static void hci_emit_hci_open_failed(void){ 4828 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4829 uint8_t event[2]; 4830 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4831 event[1] = sizeof(event) - 2u; 4832 hci_emit_event(event, sizeof(event), 1); 4833 } 4834 4835 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4836 log_info("hci_emit_dedicated_bonding_result %u ", status); 4837 uint8_t event[9]; 4838 int pos = 0; 4839 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4840 event[pos++] = sizeof(event) - 2u; 4841 event[pos++] = status; 4842 reverse_bd_addr(address, &event[pos]); 4843 hci_emit_event(event, sizeof(event), 1); 4844 } 4845 4846 4847 #ifdef ENABLE_CLASSIC 4848 4849 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4850 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4851 uint8_t event[5]; 4852 int pos = 0; 4853 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4854 event[pos++] = sizeof(event) - 2; 4855 little_endian_store_16(event, 2, con_handle); 4856 pos += 2; 4857 event[pos++] = level; 4858 hci_emit_event(event, sizeof(event), 1); 4859 } 4860 4861 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4862 if (!connection) return LEVEL_0; 4863 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4864 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4865 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4866 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4867 // LEVEL 4 always requires 128 bit encrytion key size 4868 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4869 security_level = LEVEL_3; 4870 } 4871 return security_level; 4872 } 4873 4874 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4875 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4876 uint8_t event[3]; 4877 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4878 event[1] = sizeof(event) - 2; 4879 event[2] = enabled; 4880 hci_emit_event(event, sizeof(event), 1); 4881 } 4882 4883 // query if remote side supports eSCO 4884 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4885 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4886 if (!connection) return 0; 4887 return (connection->remote_supported_features[0] & 1) != 0; 4888 } 4889 4890 static bool hci_ssp_supported(hci_connection_t * connection){ 4891 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4892 return (connection->bonding_flags & mask) == mask; 4893 } 4894 4895 // query if remote side supports SSP 4896 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4897 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4898 if (!connection) return 0; 4899 return hci_ssp_supported(connection) ? 1 : 0; 4900 } 4901 4902 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4903 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4904 } 4905 4906 // GAP API 4907 /** 4908 * @bbrief enable/disable bonding. default is enabled 4909 * @praram enabled 4910 */ 4911 void gap_set_bondable_mode(int enable){ 4912 hci_stack->bondable = enable ? 1 : 0; 4913 } 4914 /** 4915 * @brief Get bondable mode. 4916 * @return 1 if bondable 4917 */ 4918 int gap_get_bondable_mode(void){ 4919 return hci_stack->bondable; 4920 } 4921 4922 /** 4923 * @brief map link keys to security levels 4924 */ 4925 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4926 switch (link_key_type){ 4927 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4928 return LEVEL_4; 4929 case COMBINATION_KEY: 4930 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4931 return LEVEL_3; 4932 default: 4933 return LEVEL_2; 4934 } 4935 } 4936 4937 /** 4938 * @brief map link keys to secure connection yes/no 4939 */ 4940 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4941 switch (link_key_type){ 4942 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4943 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4944 return 1; 4945 default: 4946 return 0; 4947 } 4948 } 4949 4950 /** 4951 * @brief map link keys to authenticated 4952 */ 4953 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4954 switch (link_key_type){ 4955 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4956 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4957 return 1; 4958 default: 4959 return 0; 4960 } 4961 } 4962 4963 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4964 log_info("gap_mitm_protection_required_for_security_level %u", level); 4965 return level > LEVEL_2; 4966 } 4967 4968 /** 4969 * @brief get current security level 4970 */ 4971 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4972 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4973 if (!connection) return LEVEL_0; 4974 return gap_security_level_for_connection(connection); 4975 } 4976 4977 /** 4978 * @brief request connection to device to 4979 * @result GAP_AUTHENTICATION_RESULT 4980 */ 4981 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4982 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4983 if (!connection){ 4984 hci_emit_security_level(con_handle, LEVEL_0); 4985 return; 4986 } 4987 gap_security_level_t current_level = gap_security_level(con_handle); 4988 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4989 requested_level, connection->requested_security_level, current_level); 4990 4991 // assumption: earlier requested security higher than current level => security request is active 4992 if (current_level < connection->requested_security_level){ 4993 if (connection->requested_security_level < requested_level){ 4994 // increase requested level as new level is higher 4995 4996 // TODO: handle re-authentication when done 4997 4998 connection->requested_security_level = requested_level; 4999 } 5000 return; 5001 } 5002 5003 // no request active, notify if security sufficient 5004 if (requested_level <= current_level){ 5005 hci_emit_security_level(con_handle, current_level); 5006 return; 5007 } 5008 5009 // start pairing to increase security level 5010 connection->requested_security_level = requested_level; 5011 5012 #if 0 5013 // sending encryption request without a link key results in an error. 5014 // TODO: figure out how to use it properly 5015 5016 // would enabling ecnryption suffice (>= LEVEL_2)? 5017 if (hci_stack->link_key_db){ 5018 link_key_type_t link_key_type; 5019 link_key_t link_key; 5020 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 5021 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 5022 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 5023 return; 5024 } 5025 } 5026 } 5027 #endif 5028 5029 // start to authenticate connection if not already active 5030 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5031 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5032 hci_run(); 5033 } 5034 5035 /** 5036 * @brief start dedicated bonding with device. disconnect after bonding 5037 * @param device 5038 * @param request MITM protection 5039 * @result GAP_DEDICATED_BONDING_COMPLETE 5040 */ 5041 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5042 5043 // create connection state machine 5044 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5045 5046 if (!connection){ 5047 return BTSTACK_MEMORY_ALLOC_FAILED; 5048 } 5049 5050 // delete linkn key 5051 gap_drop_link_key_for_bd_addr(device); 5052 5053 // configure LEVEL_2/3, dedicated bonding 5054 connection->state = SEND_CREATE_CONNECTION; 5055 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5056 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5057 connection->bonding_flags = BONDING_DEDICATED; 5058 5059 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5060 5061 // handle: connnection failure (connection complete != ok) 5062 // handle: authentication failure 5063 // handle: disconnect on done 5064 5065 hci_run(); 5066 5067 return 0; 5068 } 5069 #endif 5070 5071 void gap_set_local_name(const char * local_name){ 5072 hci_stack->local_name = local_name; 5073 } 5074 5075 5076 #ifdef ENABLE_BLE 5077 5078 #ifdef ENABLE_LE_CENTRAL 5079 void gap_start_scan(void){ 5080 hci_stack->le_scanning_enabled = true; 5081 hci_run(); 5082 } 5083 5084 void gap_stop_scan(void){ 5085 hci_stack->le_scanning_enabled = false; 5086 hci_run(); 5087 } 5088 5089 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5090 hci_stack->le_scan_type = scan_type; 5091 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5092 hci_stack->le_scan_interval = scan_interval; 5093 hci_stack->le_scan_window = scan_window; 5094 hci_stack->le_scanning_param_update = true; 5095 hci_run(); 5096 } 5097 5098 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5099 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5100 } 5101 5102 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5103 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5104 if (!conn){ 5105 // disallow if le connection is already outgoing 5106 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5107 log_error("le connection already active"); 5108 return ERROR_CODE_COMMAND_DISALLOWED; 5109 } 5110 5111 log_info("gap_connect: no connection exists yet, creating context"); 5112 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5113 if (!conn){ 5114 // notify client that alloc failed 5115 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5116 log_info("gap_connect: failed to alloc hci_connection_t"); 5117 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5118 } 5119 5120 // set le connecting state 5121 if (hci_is_le_connection_type(addr_type)){ 5122 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5123 } 5124 5125 conn->state = SEND_CREATE_CONNECTION; 5126 log_info("gap_connect: send create connection next"); 5127 hci_run(); 5128 return ERROR_CODE_SUCCESS; 5129 } 5130 5131 if (!hci_is_le_connection(conn) || 5132 (conn->state == SEND_CREATE_CONNECTION) || 5133 (conn->state == SENT_CREATE_CONNECTION)) { 5134 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5135 log_error("gap_connect: classic connection or connect is already being created"); 5136 return GATT_CLIENT_IN_WRONG_STATE; 5137 } 5138 5139 // check if connection was just disconnected 5140 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5141 log_info("gap_connect: send create connection (again)"); 5142 conn->state = SEND_CREATE_CONNECTION; 5143 hci_run(); 5144 return ERROR_CODE_SUCCESS; 5145 } 5146 5147 log_info("gap_connect: context exists with state %u", conn->state); 5148 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5149 hci_run(); 5150 return ERROR_CODE_SUCCESS; 5151 } 5152 5153 // @assumption: only a single outgoing LE Connection exists 5154 static hci_connection_t * gap_get_outgoing_connection(void){ 5155 btstack_linked_item_t *it; 5156 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5157 hci_connection_t * conn = (hci_connection_t *) it; 5158 if (!hci_is_le_connection(conn)) continue; 5159 switch (conn->state){ 5160 case SEND_CREATE_CONNECTION: 5161 case SENT_CREATE_CONNECTION: 5162 case SENT_CANCEL_CONNECTION: 5163 return conn; 5164 default: 5165 break; 5166 }; 5167 } 5168 return NULL; 5169 } 5170 5171 uint8_t gap_connect_cancel(void){ 5172 hci_connection_t * conn = gap_get_outgoing_connection(); 5173 if (!conn) return 0; 5174 switch (conn->state){ 5175 case SEND_CREATE_CONNECTION: 5176 // skip sending create connection and emit event instead 5177 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5178 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5179 btstack_memory_hci_connection_free( conn ); 5180 break; 5181 case SENT_CREATE_CONNECTION: 5182 // request to send cancel connection 5183 conn->state = SEND_CANCEL_CONNECTION; 5184 hci_run(); 5185 break; 5186 default: 5187 break; 5188 } 5189 return 0; 5190 } 5191 #endif 5192 5193 #ifdef ENABLE_LE_CENTRAL 5194 /** 5195 * @brief Set connection parameters for outgoing connections 5196 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5197 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5198 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5199 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5200 * @param conn_latency, default: 4 5201 * @param supervision_timeout (unit: 10ms), default: 720 ms 5202 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5203 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5204 */ 5205 5206 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5207 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5208 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5209 hci_stack->le_connection_scan_interval = conn_scan_interval; 5210 hci_stack->le_connection_scan_window = conn_scan_window; 5211 hci_stack->le_connection_interval_min = conn_interval_min; 5212 hci_stack->le_connection_interval_max = conn_interval_max; 5213 hci_stack->le_connection_latency = conn_latency; 5214 hci_stack->le_supervision_timeout = supervision_timeout; 5215 hci_stack->le_minimum_ce_length = min_ce_length; 5216 hci_stack->le_maximum_ce_length = max_ce_length; 5217 } 5218 #endif 5219 5220 /** 5221 * @brief Updates the connection parameters for a given LE connection 5222 * @param handle 5223 * @param conn_interval_min (unit: 1.25ms) 5224 * @param conn_interval_max (unit: 1.25ms) 5225 * @param conn_latency 5226 * @param supervision_timeout (unit: 10ms) 5227 * @returns 0 if ok 5228 */ 5229 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5230 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5231 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5232 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5233 connection->le_conn_interval_min = conn_interval_min; 5234 connection->le_conn_interval_max = conn_interval_max; 5235 connection->le_conn_latency = conn_latency; 5236 connection->le_supervision_timeout = supervision_timeout; 5237 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5238 hci_run(); 5239 return 0; 5240 } 5241 5242 /** 5243 * @brief Request an update of the connection parameter for a given LE connection 5244 * @param handle 5245 * @param conn_interval_min (unit: 1.25ms) 5246 * @param conn_interval_max (unit: 1.25ms) 5247 * @param conn_latency 5248 * @param supervision_timeout (unit: 10ms) 5249 * @returns 0 if ok 5250 */ 5251 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5252 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5253 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5254 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5255 connection->le_conn_interval_min = conn_interval_min; 5256 connection->le_conn_interval_max = conn_interval_max; 5257 connection->le_conn_latency = conn_latency; 5258 connection->le_supervision_timeout = supervision_timeout; 5259 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5260 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5261 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5262 return 0; 5263 } 5264 5265 #ifdef ENABLE_LE_PERIPHERAL 5266 5267 /** 5268 * @brief Set Advertisement Data 5269 * @param advertising_data_length 5270 * @param advertising_data (max 31 octets) 5271 * @note data is not copied, pointer has to stay valid 5272 */ 5273 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5274 hci_stack->le_advertisements_data_len = advertising_data_length; 5275 hci_stack->le_advertisements_data = advertising_data; 5276 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5277 hci_run(); 5278 } 5279 5280 /** 5281 * @brief Set Scan Response Data 5282 * @param advertising_data_length 5283 * @param advertising_data (max 31 octets) 5284 * @note data is not copied, pointer has to stay valid 5285 */ 5286 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5287 hci_stack->le_scan_response_data_len = scan_response_data_length; 5288 hci_stack->le_scan_response_data = scan_response_data; 5289 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5290 hci_run(); 5291 } 5292 5293 /** 5294 * @brief Set Advertisement Parameters 5295 * @param adv_int_min 5296 * @param adv_int_max 5297 * @param adv_type 5298 * @param direct_address_type 5299 * @param direct_address 5300 * @param channel_map 5301 * @param filter_policy 5302 * 5303 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5304 */ 5305 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5306 uint8_t direct_address_typ, bd_addr_t direct_address, 5307 uint8_t channel_map, uint8_t filter_policy) { 5308 5309 hci_stack->le_advertisements_interval_min = adv_int_min; 5310 hci_stack->le_advertisements_interval_max = adv_int_max; 5311 hci_stack->le_advertisements_type = adv_type; 5312 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5313 hci_stack->le_advertisements_channel_map = channel_map; 5314 hci_stack->le_advertisements_filter_policy = filter_policy; 5315 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5316 6); 5317 5318 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5319 hci_run(); 5320 } 5321 5322 /** 5323 * @brief Enable/Disable Advertisements 5324 * @param enabled 5325 */ 5326 void gap_advertisements_enable(int enabled){ 5327 hci_stack->le_advertisements_enabled = enabled != 0; 5328 hci_update_advertisements_enabled_for_current_roles(); 5329 hci_run(); 5330 } 5331 5332 #endif 5333 5334 void hci_le_set_own_address_type(uint8_t own_address_type){ 5335 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5336 if (own_address_type == hci_stack->le_own_addr_type) return; 5337 hci_stack->le_own_addr_type = own_address_type; 5338 5339 #ifdef ENABLE_LE_PERIPHERAL 5340 // update advertisement parameters, too 5341 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5342 hci_run(); 5343 #endif 5344 #ifdef ENABLE_LE_CENTRAL 5345 // note: we don't update scan parameters or modify ongoing connection attempts 5346 #endif 5347 } 5348 5349 #endif 5350 5351 uint8_t gap_disconnect(hci_con_handle_t handle){ 5352 hci_connection_t * conn = hci_connection_for_handle(handle); 5353 if (!conn){ 5354 hci_emit_disconnection_complete(handle, 0); 5355 return 0; 5356 } 5357 // ignore if already disconnected 5358 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5359 return 0; 5360 } 5361 conn->state = SEND_DISCONNECT; 5362 hci_run(); 5363 return 0; 5364 } 5365 5366 int gap_read_rssi(hci_con_handle_t con_handle){ 5367 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5368 if (hci_connection == NULL) return 0; 5369 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5370 hci_run(); 5371 return 1; 5372 } 5373 5374 /** 5375 * @brief Get connection type 5376 * @param con_handle 5377 * @result connection_type 5378 */ 5379 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5380 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5381 if (!conn) return GAP_CONNECTION_INVALID; 5382 switch (conn->address_type){ 5383 case BD_ADDR_TYPE_LE_PUBLIC: 5384 case BD_ADDR_TYPE_LE_RANDOM: 5385 return GAP_CONNECTION_LE; 5386 case BD_ADDR_TYPE_SCO: 5387 return GAP_CONNECTION_SCO; 5388 case BD_ADDR_TYPE_ACL: 5389 return GAP_CONNECTION_ACL; 5390 default: 5391 return GAP_CONNECTION_INVALID; 5392 } 5393 } 5394 5395 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5396 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5397 if (!conn) return HCI_ROLE_INVALID; 5398 return (hci_role_t) conn->role; 5399 } 5400 5401 5402 #ifdef ENABLE_CLASSIC 5403 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5404 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5405 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5406 conn->request_role = role; 5407 hci_run(); 5408 return ERROR_CODE_SUCCESS; 5409 } 5410 #endif 5411 5412 #ifdef ENABLE_BLE 5413 5414 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5415 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5416 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5417 5418 conn->le_phy_update_all_phys = all_phys; 5419 conn->le_phy_update_tx_phys = tx_phys; 5420 conn->le_phy_update_rx_phys = rx_phys; 5421 conn->le_phy_update_phy_options = phy_options; 5422 5423 hci_run(); 5424 5425 return 0; 5426 } 5427 5428 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5429 // check if already in list 5430 btstack_linked_list_iterator_t it; 5431 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5432 while (btstack_linked_list_iterator_has_next(&it)) { 5433 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5434 if (entry->address_type != address_type) { 5435 continue; 5436 } 5437 if (memcmp(entry->address, address, 6) != 0) { 5438 continue; 5439 } 5440 // already in there 5441 return ERROR_CODE_COMMAND_DISALLOWED; 5442 } 5443 // alloc and add to list 5444 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5445 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5446 entry->address_type = address_type; 5447 (void)memcpy(entry->address, address, 6); 5448 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5449 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5450 return ERROR_CODE_SUCCESS; 5451 } 5452 5453 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5454 btstack_linked_list_iterator_t it; 5455 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5456 while (btstack_linked_list_iterator_has_next(&it)){ 5457 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5458 if (entry->address_type != address_type) { 5459 continue; 5460 } 5461 if (memcmp(entry->address, address, 6) != 0) { 5462 continue; 5463 } 5464 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5465 // remove from controller if already present 5466 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5467 } else { 5468 // directly remove entry from whitelist 5469 btstack_linked_list_iterator_remove(&it); 5470 btstack_memory_whitelist_entry_free(entry); 5471 } 5472 return ERROR_CODE_SUCCESS; 5473 } 5474 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5475 } 5476 5477 static void hci_whitelist_clear(void){ 5478 btstack_linked_list_iterator_t it; 5479 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5480 while (btstack_linked_list_iterator_has_next(&it)){ 5481 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5482 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5483 // remove from controller if already present 5484 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5485 continue; 5486 } 5487 // directly remove entry from whitelist 5488 btstack_linked_list_iterator_remove(&it); 5489 btstack_memory_whitelist_entry_free(entry); 5490 } 5491 } 5492 5493 /** 5494 * @brief Clear Whitelist 5495 * @returns 0 if ok 5496 */ 5497 uint8_t gap_whitelist_clear(void){ 5498 hci_whitelist_clear(); 5499 hci_run(); 5500 return ERROR_CODE_SUCCESS; 5501 } 5502 5503 /** 5504 * @brief Add Device to Whitelist 5505 * @param address_typ 5506 * @param address 5507 * @returns 0 if ok 5508 */ 5509 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5510 uint8_t status = hci_whitelist_add(address_type, address); 5511 if (status){ 5512 return status; 5513 } 5514 hci_run(); 5515 return ERROR_CODE_SUCCESS; 5516 } 5517 5518 /** 5519 * @brief Remove Device from Whitelist 5520 * @param address_typ 5521 * @param address 5522 * @returns 0 if ok 5523 */ 5524 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5525 uint8_t status = hci_whitelist_remove(address_type, address); 5526 if (status){ 5527 return status; 5528 } 5529 hci_run(); 5530 return ERROR_CODE_SUCCESS; 5531 } 5532 5533 #ifdef ENABLE_LE_CENTRAL 5534 /** 5535 * @brief Connect with Whitelist 5536 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5537 * @returns - if ok 5538 */ 5539 uint8_t gap_connect_with_whitelist(void){ 5540 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5541 return ERROR_CODE_COMMAND_DISALLOWED; 5542 } 5543 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5544 hci_run(); 5545 return ERROR_CODE_SUCCESS; 5546 } 5547 5548 /** 5549 * @brief Auto Connection Establishment - Start Connecting to device 5550 * @param address_typ 5551 * @param address 5552 * @returns 0 if ok 5553 */ 5554 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5555 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5556 return ERROR_CODE_COMMAND_DISALLOWED; 5557 } 5558 5559 uint8_t status = hci_whitelist_add(address_type, address); 5560 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5561 return status; 5562 } 5563 5564 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5565 5566 hci_run(); 5567 return ERROR_CODE_SUCCESS; 5568 } 5569 5570 /** 5571 * @brief Auto Connection Establishment - Stop Connecting to device 5572 * @param address_typ 5573 * @param address 5574 * @returns 0 if ok 5575 */ 5576 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5577 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5578 return ERROR_CODE_COMMAND_DISALLOWED; 5579 } 5580 5581 hci_whitelist_remove(address_type, address); 5582 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5583 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5584 } 5585 hci_run(); 5586 return 0; 5587 } 5588 5589 /** 5590 * @brief Auto Connection Establishment - Stop everything 5591 * @note Convenience function to stop all active auto connection attempts 5592 */ 5593 uint8_t gap_auto_connection_stop_all(void){ 5594 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5595 return ERROR_CODE_COMMAND_DISALLOWED; 5596 } 5597 hci_whitelist_clear(); 5598 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5599 hci_run(); 5600 return ERROR_CODE_SUCCESS; 5601 } 5602 5603 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5604 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5605 if (!conn) return 0; 5606 return conn->le_connection_interval; 5607 } 5608 #endif 5609 #endif 5610 5611 #ifdef ENABLE_CLASSIC 5612 /** 5613 * @brief Set Extended Inquiry Response data 5614 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5615 * @note has to be done before stack starts up 5616 */ 5617 void gap_set_extended_inquiry_response(const uint8_t * data){ 5618 hci_stack->eir_data = data; 5619 } 5620 5621 /** 5622 * @brief Start GAP Classic Inquiry 5623 * @param duration in 1.28s units 5624 * @return 0 if ok 5625 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5626 */ 5627 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5628 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5629 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5630 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5631 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5632 } 5633 hci_stack->inquiry_state = duration_in_1280ms_units; 5634 hci_run(); 5635 return 0; 5636 } 5637 5638 /** 5639 * @brief Stop GAP Classic Inquiry 5640 * @returns 0 if ok 5641 */ 5642 int gap_inquiry_stop(void){ 5643 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5644 // emit inquiry complete event, before it even started 5645 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5646 hci_emit_event(event, sizeof(event), 1); 5647 return 0; 5648 } 5649 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5650 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5651 hci_run(); 5652 return 0; 5653 } 5654 5655 5656 /** 5657 * @brief Remote Name Request 5658 * @param addr 5659 * @param page_scan_repetition_mode 5660 * @param clock_offset only used when bit 15 is set 5661 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5662 */ 5663 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5664 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5665 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5666 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5667 hci_stack->remote_name_clock_offset = clock_offset; 5668 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5669 hci_run(); 5670 return 0; 5671 } 5672 5673 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5674 hci_stack->gap_pairing_state = state; 5675 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5676 hci_run(); 5677 return 0; 5678 } 5679 5680 /** 5681 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5682 * @param addr 5683 * @param pin_data 5684 * @param pin_len 5685 * @return 0 if ok 5686 */ 5687 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5688 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5689 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5690 hci_stack->gap_pairing_pin_len = pin_len; 5691 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5692 } 5693 5694 /** 5695 * @brief Legacy Pairing Pin Code Response 5696 * @param addr 5697 * @param pin 5698 * @return 0 if ok 5699 */ 5700 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5701 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5702 } 5703 5704 /** 5705 * @brief Abort Legacy Pairing 5706 * @param addr 5707 * @param pin 5708 * @return 0 if ok 5709 */ 5710 int gap_pin_code_negative(bd_addr_t addr){ 5711 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5712 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5713 } 5714 5715 /** 5716 * @brief SSP Passkey Response 5717 * @param addr 5718 * @param passkey 5719 * @return 0 if ok 5720 */ 5721 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5722 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5723 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5724 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5725 } 5726 5727 /** 5728 * @brief Abort SSP Passkey Entry/Pairing 5729 * @param addr 5730 * @param pin 5731 * @return 0 if ok 5732 */ 5733 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5734 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5735 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5736 } 5737 5738 /** 5739 * @brief Accept SSP Numeric Comparison 5740 * @param addr 5741 * @param passkey 5742 * @return 0 if ok 5743 */ 5744 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5745 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5746 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5747 } 5748 5749 /** 5750 * @brief Abort SSP Numeric Comparison/Pairing 5751 * @param addr 5752 * @param pin 5753 * @return 0 if ok 5754 */ 5755 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5756 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5757 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5758 } 5759 5760 /** 5761 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5762 * @param inquiry_mode see bluetooth_defines.h 5763 */ 5764 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5765 hci_stack->inquiry_mode = mode; 5766 } 5767 5768 /** 5769 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5770 */ 5771 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5772 hci_stack->sco_voice_setting = voice_setting; 5773 } 5774 5775 /** 5776 * @brief Get SCO Voice Setting 5777 * @return current voice setting 5778 */ 5779 uint16_t hci_get_sco_voice_setting(void){ 5780 return hci_stack->sco_voice_setting; 5781 } 5782 5783 static int hci_have_usb_transport(void){ 5784 if (!hci_stack->hci_transport) return 0; 5785 const char * transport_name = hci_stack->hci_transport->name; 5786 if (!transport_name) return 0; 5787 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5788 } 5789 5790 /** @brief Get SCO packet length for current SCO Voice setting 5791 * @note Using SCO packets of the exact length is required for USB transfer 5792 * @return Length of SCO packets in bytes (not audio frames) 5793 */ 5794 int hci_get_sco_packet_length(void){ 5795 int sco_packet_length = 0; 5796 5797 #ifdef ENABLE_SCO_OVER_HCI 5798 5799 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5800 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5801 5802 if (hci_have_usb_transport()){ 5803 // see Core Spec for H2 USB Transfer. 5804 // 3 byte SCO header + 24 bytes per connection 5805 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5806 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5807 } else { 5808 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5809 sco_packet_length = 3 + 60 * multiplier; 5810 // assert that it still fits inside an SCO buffer 5811 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5812 sco_packet_length = 3 + 60; 5813 } 5814 } 5815 #endif 5816 return sco_packet_length; 5817 } 5818 5819 /** 5820 * @brief Sets the master/slave policy 5821 * @param policy (0: attempt to become master, 1: let connecting device decide) 5822 */ 5823 void hci_set_master_slave_policy(uint8_t policy){ 5824 hci_stack->master_slave_policy = policy; 5825 } 5826 5827 #endif 5828 5829 HCI_STATE hci_get_state(void){ 5830 return hci_stack->state; 5831 } 5832 5833 #ifdef ENABLE_CLASSIC 5834 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5835 hci_stack->gap_classic_accept_callback = accept_callback; 5836 } 5837 #endif 5838 5839 /** 5840 * @brief Set callback for Bluetooth Hardware Error 5841 */ 5842 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5843 hci_stack->hardware_error_callback = fn; 5844 } 5845 5846 void hci_disconnect_all(void){ 5847 btstack_linked_list_iterator_t it; 5848 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5849 while (btstack_linked_list_iterator_has_next(&it)){ 5850 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5851 if (con->state == SENT_DISCONNECT) continue; 5852 con->state = SEND_DISCONNECT; 5853 } 5854 hci_run(); 5855 } 5856 5857 uint16_t hci_get_manufacturer(void){ 5858 return hci_stack->manufacturer; 5859 } 5860 5861 #ifdef ENABLE_BLE 5862 5863 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5864 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5865 if (!hci_con) return NULL; 5866 return &hci_con->sm_connection; 5867 } 5868 5869 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5870 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5871 5872 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5873 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5874 if (hci_connection == NULL) return 0; 5875 if (hci_is_le_connection(hci_connection)){ 5876 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5877 if (sm_conn->sm_connection_encrypted) { 5878 return sm_conn->sm_actual_encryption_key_size; 5879 } 5880 } 5881 #ifdef ENABLE_CLASSIC 5882 else { 5883 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5884 return hci_connection->encryption_key_size; 5885 } 5886 } 5887 #endif 5888 return 0; 5889 } 5890 5891 int gap_authenticated(hci_con_handle_t con_handle){ 5892 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5893 if (hci_connection == NULL) return 0; 5894 5895 switch (hci_connection->address_type){ 5896 case BD_ADDR_TYPE_LE_PUBLIC: 5897 case BD_ADDR_TYPE_LE_RANDOM: 5898 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5899 return hci_connection->sm_connection.sm_connection_authenticated; 5900 #ifdef ENABLE_CLASSIC 5901 case BD_ADDR_TYPE_SCO: 5902 case BD_ADDR_TYPE_ACL: 5903 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5904 #endif 5905 default: 5906 return 0; 5907 } 5908 } 5909 5910 int gap_secure_connection(hci_con_handle_t con_handle){ 5911 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5912 if (hci_connection == NULL) return 0; 5913 5914 switch (hci_connection->address_type){ 5915 case BD_ADDR_TYPE_LE_PUBLIC: 5916 case BD_ADDR_TYPE_LE_RANDOM: 5917 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5918 return hci_connection->sm_connection.sm_connection_sc; 5919 #ifdef ENABLE_CLASSIC 5920 case BD_ADDR_TYPE_SCO: 5921 case BD_ADDR_TYPE_ACL: 5922 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5923 #endif 5924 default: 5925 return 0; 5926 } 5927 } 5928 5929 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5930 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5931 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5932 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5933 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5934 return sm_conn->sm_connection_authorization_state; 5935 } 5936 #endif 5937 5938 #ifdef ENABLE_CLASSIC 5939 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){ 5940 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5941 if (!conn) return GAP_CONNECTION_INVALID; 5942 conn->sniff_min_interval = sniff_min_interval; 5943 conn->sniff_max_interval = sniff_max_interval; 5944 conn->sniff_attempt = sniff_attempt; 5945 conn->sniff_timeout = sniff_timeout; 5946 hci_run(); 5947 return 0; 5948 } 5949 5950 /** 5951 * @brief Exit Sniff mode 5952 * @param con_handle 5953 @ @return 0 if ok 5954 */ 5955 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5956 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5957 if (!conn) return GAP_CONNECTION_INVALID; 5958 conn->sniff_min_interval = 0xffff; 5959 hci_run(); 5960 return 0; 5961 } 5962 #endif 5963 5964 void hci_halting_defer(void){ 5965 if (hci_stack->state != HCI_STATE_HALTING) return; 5966 switch (hci_stack->substate){ 5967 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5968 case HCI_HALTING_CLOSE: 5969 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5970 break; 5971 default: 5972 break; 5973 } 5974 } 5975 5976 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5977 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 5978 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 5979 if (le_device_db_index >= le_device_db_max_count()) return; 5980 uint8_t offset = le_device_db_index >> 3; 5981 uint8_t mask = 1 << (le_device_db_index & 7); 5982 hci_stack->le_resolving_list_add_entries[offset] |= mask; 5983 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 5984 // note: go back to remove entries, otherwise, a remove + add will skip the add 5985 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5986 } 5987 } 5988 5989 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 5990 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 5991 if (le_device_db_index >= le_device_db_max_count()) return; 5992 uint8_t offset = le_device_db_index >> 3; 5993 uint8_t mask = 1 << (le_device_db_index & 7); 5994 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 5995 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 5996 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5997 } 5998 } 5999 6000 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6001 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6002 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6003 } 6004 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6005 // restart le resolving list update 6006 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6007 } 6008 return ERROR_CODE_SUCCESS; 6009 } 6010 #endif 6011 6012 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6013 void hci_setup_test_connections_fuzz(void){ 6014 hci_connection_t * conn; 6015 6016 // default address: 66:55:44:33:00:01 6017 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6018 6019 // setup Controller info 6020 hci_stack->num_cmd_packets = 255; 6021 hci_stack->acl_packets_total_num = 255; 6022 6023 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6024 addr[5] = 0x01; 6025 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6026 conn->con_handle = addr[5]; 6027 conn->role = HCI_ROLE_SLAVE; 6028 conn->state = RECEIVED_CONNECTION_REQUEST; 6029 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6030 6031 // setup incoming Classic SCO connection with con handle 0x0002 6032 addr[5] = 0x02; 6033 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6034 conn->con_handle = addr[5]; 6035 conn->role = HCI_ROLE_SLAVE; 6036 conn->state = RECEIVED_CONNECTION_REQUEST; 6037 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6038 6039 // setup ready Classic ACL connection with con handle 0x0003 6040 addr[5] = 0x03; 6041 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6042 conn->con_handle = addr[5]; 6043 conn->role = HCI_ROLE_SLAVE; 6044 conn->state = OPEN; 6045 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6046 6047 // setup ready Classic SCO connection with con handle 0x0004 6048 addr[5] = 0x04; 6049 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6050 conn->con_handle = addr[5]; 6051 conn->role = HCI_ROLE_SLAVE; 6052 conn->state = OPEN; 6053 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6054 6055 // setup ready LE ACL connection with con handle 0x005 and public address 6056 addr[5] = 0x05; 6057 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6058 conn->con_handle = addr[5]; 6059 conn->role = HCI_ROLE_SLAVE; 6060 conn->state = OPEN; 6061 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6062 } 6063 6064 void hci_free_connections_fuzz(void){ 6065 btstack_linked_list_iterator_t it; 6066 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6067 while (btstack_linked_list_iterator_has_next(&it)){ 6068 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6069 btstack_linked_list_iterator_remove(&it); 6070 btstack_memory_hci_connection_free(con); 6071 } 6072 } 6073 void hci_simulate_working_fuzz(void){ 6074 hci_init_done(); 6075 hci_stack->num_cmd_packets = 255; 6076 } 6077 #endif 6078