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 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 403 if (!hci_stack->link_key_db) return false; 404 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 405 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 406 return result; 407 } 408 409 void gap_delete_all_link_keys(void){ 410 bd_addr_t addr; 411 link_key_t link_key; 412 link_key_type_t type; 413 btstack_link_key_iterator_t it; 414 int ok = gap_link_key_iterator_init(&it); 415 if (!ok) { 416 log_error("could not initialize iterator"); 417 return; 418 } 419 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 420 gap_drop_link_key_for_bd_addr(addr); 421 } 422 gap_link_key_iterator_done(&it); 423 } 424 425 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return 0; 427 if (!hci_stack->link_key_db->iterator_init) return 0; 428 return hci_stack->link_key_db->iterator_init(it); 429 } 430 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){ 431 if (!hci_stack->link_key_db) return 0; 432 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 433 } 434 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 435 if (!hci_stack->link_key_db) return; 436 hci_stack->link_key_db->iterator_done(it); 437 } 438 #endif 439 440 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 441 switch (address_type){ 442 case BD_ADDR_TYPE_LE_PUBLIC: 443 case BD_ADDR_TYPE_LE_RANDOM: 444 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 445 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 446 return true; 447 default: 448 return false; 449 } 450 } 451 452 static int hci_is_le_connection(hci_connection_t * connection){ 453 return hci_is_le_connection_type(connection->address_type); 454 } 455 456 /** 457 * count connections 458 */ 459 static int nr_hci_connections(void){ 460 int count = 0; 461 btstack_linked_item_t *it; 462 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 463 count++; 464 } 465 return count; 466 } 467 468 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 469 470 unsigned int num_packets_sent_classic = 0; 471 unsigned int num_packets_sent_le = 0; 472 473 btstack_linked_item_t *it; 474 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 475 hci_connection_t * connection = (hci_connection_t *) it; 476 if (hci_is_le_connection(connection)){ 477 num_packets_sent_le += connection->num_packets_sent; 478 } 479 if (connection->address_type == BD_ADDR_TYPE_ACL){ 480 num_packets_sent_classic += connection->num_packets_sent; 481 } 482 } 483 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 484 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 485 int free_slots_le = 0; 486 487 if (free_slots_classic < 0){ 488 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); 489 return 0; 490 } 491 492 if (hci_stack->le_acl_packets_total_num){ 493 // if we have LE slots, they are used 494 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 495 if (free_slots_le < 0){ 496 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); 497 return 0; 498 } 499 } else { 500 // otherwise, classic slots are used for LE, too 501 free_slots_classic -= num_packets_sent_le; 502 if (free_slots_classic < 0){ 503 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); 504 return 0; 505 } 506 } 507 508 switch (address_type){ 509 case BD_ADDR_TYPE_UNKNOWN: 510 log_error("hci_number_free_acl_slots: unknown address type"); 511 return 0; 512 513 case BD_ADDR_TYPE_ACL: 514 return free_slots_classic; 515 516 default: 517 if (hci_stack->le_acl_packets_total_num){ 518 return free_slots_le; 519 } 520 return free_slots_classic; 521 } 522 } 523 524 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 525 // get connection type 526 hci_connection_t * connection = hci_connection_for_handle(con_handle); 527 if (!connection){ 528 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 529 return 0; 530 } 531 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 532 } 533 534 #ifdef ENABLE_CLASSIC 535 static int hci_number_free_sco_slots(void){ 536 unsigned int num_sco_packets_sent = 0; 537 btstack_linked_item_t *it; 538 if (hci_stack->synchronous_flow_control_enabled){ 539 // explicit flow control 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 num_sco_packets_sent += connection->num_packets_sent; 544 } 545 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 546 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 547 return 0; 548 } 549 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 550 } else { 551 // implicit flow control -- TODO 552 int num_ready = 0; 553 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 554 hci_connection_t * connection = (hci_connection_t *) it; 555 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 556 if (connection->sco_tx_ready == 0) continue; 557 num_ready++; 558 } 559 return num_ready; 560 } 561 } 562 #endif 563 564 // only used to send HCI Host Number Completed Packets 565 static int hci_can_send_comand_packet_transport(void){ 566 if (hci_stack->hci_packet_buffer_reserved) return 0; 567 568 // check for async hci transport implementations 569 if (hci_stack->hci_transport->can_send_packet_now){ 570 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 571 return 0; 572 } 573 } 574 return 1; 575 } 576 577 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 578 int hci_can_send_command_packet_now(void){ 579 if (hci_can_send_comand_packet_transport() == 0) return 0; 580 return hci_stack->num_cmd_packets > 0u; 581 } 582 583 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 584 // check for async hci transport implementations 585 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 586 return hci_stack->hci_transport->can_send_packet_now(packet_type); 587 } 588 589 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 590 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 591 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 592 } 593 594 int hci_can_send_acl_le_packet_now(void){ 595 if (hci_stack->hci_packet_buffer_reserved) return 0; 596 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 597 } 598 599 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 600 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 601 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 602 } 603 604 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_acl_packet_now(con_handle); 607 } 608 609 #ifdef ENABLE_CLASSIC 610 int hci_can_send_acl_classic_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 613 } 614 615 int hci_can_send_prepared_sco_packet_now(void){ 616 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 617 if (hci_have_usb_transport()){ 618 return hci_stack->sco_can_send_now; 619 } else { 620 return hci_number_free_sco_slots() > 0; 621 } 622 } 623 624 int hci_can_send_sco_packet_now(void){ 625 if (hci_stack->hci_packet_buffer_reserved) return 0; 626 return hci_can_send_prepared_sco_packet_now(); 627 } 628 629 void hci_request_sco_can_send_now_event(void){ 630 hci_stack->sco_waiting_for_can_send_now = 1; 631 hci_notify_if_sco_can_send_now(); 632 } 633 #endif 634 635 // used for internal checks in l2cap.c 636 int hci_is_packet_buffer_reserved(void){ 637 return hci_stack->hci_packet_buffer_reserved; 638 } 639 640 // reserves outgoing packet buffer. @returns 1 if successful 641 int hci_reserve_packet_buffer(void){ 642 if (hci_stack->hci_packet_buffer_reserved) { 643 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 644 return 0; 645 } 646 hci_stack->hci_packet_buffer_reserved = 1; 647 return 1; 648 } 649 650 void hci_release_packet_buffer(void){ 651 hci_stack->hci_packet_buffer_reserved = 0; 652 } 653 654 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 655 static int hci_transport_synchronous(void){ 656 return hci_stack->hci_transport->can_send_packet_now == NULL; 657 } 658 659 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 660 661 // 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); 662 663 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 664 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 665 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 666 max_acl_data_packet_length = hci_stack->le_data_packets_length; 667 } 668 669 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 670 if (hci_is_le_connection(connection)){ 671 max_acl_data_packet_length = connection->le_max_tx_octets; 672 } 673 #endif 674 675 log_debug("hci_send_acl_packet_fragments entered"); 676 677 int err; 678 // multiple packets could be send on a synchronous HCI transport 679 while (true){ 680 681 log_debug("hci_send_acl_packet_fragments loop entered"); 682 683 // get current data 684 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 685 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 686 int more_fragments = 0; 687 688 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 689 if (current_acl_data_packet_length > max_acl_data_packet_length){ 690 more_fragments = 1; 691 current_acl_data_packet_length = max_acl_data_packet_length; 692 } 693 694 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 695 if (acl_header_pos > 0u){ 696 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 697 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 698 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 699 } 700 701 // update header len 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 703 704 // count packet 705 connection->num_packets_sent++; 706 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 707 708 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 709 if (more_fragments){ 710 // update start of next fragment to send 711 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 712 } else { 713 // done 714 hci_stack->acl_fragmentation_pos = 0; 715 hci_stack->acl_fragmentation_total_size = 0; 716 } 717 718 // send packet 719 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 720 const int size = current_acl_data_packet_length + 4; 721 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 722 hci_stack->acl_fragmentation_tx_active = 1; 723 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 724 725 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 726 727 // done yet? 728 if (!more_fragments) break; 729 730 // can send more? 731 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 732 } 733 734 log_debug("hci_send_acl_packet_fragments loop over"); 735 736 // release buffer now for synchronous transport 737 if (hci_transport_synchronous()){ 738 hci_stack->acl_fragmentation_tx_active = 0; 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 } 742 743 return err; 744 } 745 746 // pre: caller has reserved the packet buffer 747 int hci_send_acl_packet_buffer(int size){ 748 749 // log_info("hci_send_acl_packet_buffer size %u", size); 750 751 if (!hci_stack->hci_packet_buffer_reserved) { 752 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 753 return 0; 754 } 755 756 uint8_t * packet = hci_stack->hci_packet_buffer; 757 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 758 759 // check for free places on Bluetooth module 760 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 761 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return BTSTACK_ACL_BUFFERS_FULL; 765 } 766 767 hci_connection_t *connection = hci_connection_for_handle( con_handle); 768 if (!connection) { 769 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return 0; 773 } 774 775 #ifdef ENABLE_CLASSIC 776 hci_connection_timestamp(connection); 777 #endif 778 779 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 780 781 // setup data 782 hci_stack->acl_fragmentation_total_size = size; 783 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 784 785 return hci_send_acl_packet_fragments(connection); 786 } 787 788 #ifdef ENABLE_CLASSIC 789 // pre: caller has reserved the packet buffer 790 int hci_send_sco_packet_buffer(int size){ 791 792 // log_info("hci_send_acl_packet_buffer size %u", size); 793 794 if (!hci_stack->hci_packet_buffer_reserved) { 795 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 796 return 0; 797 } 798 799 uint8_t * packet = hci_stack->hci_packet_buffer; 800 801 // skip checks in loopback mode 802 if (!hci_stack->loopback_mode){ 803 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 804 805 // check for free places on Bluetooth module 806 if (!hci_can_send_prepared_sco_packet_now()) { 807 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 808 hci_release_packet_buffer(); 809 hci_emit_transport_packet_sent(); 810 return BTSTACK_ACL_BUFFERS_FULL; 811 } 812 813 // track send packet in connection struct 814 hci_connection_t *connection = hci_connection_for_handle( con_handle); 815 if (!connection) { 816 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return 0; 820 } 821 822 if (hci_have_usb_transport()){ 823 // token used 824 hci_stack->sco_can_send_now = 0; 825 } else { 826 if (hci_stack->synchronous_flow_control_enabled){ 827 connection->num_packets_sent++; 828 } else { 829 connection->sco_tx_ready--; 830 } 831 } 832 } 833 834 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 835 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 836 837 if (hci_transport_synchronous()){ 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 } 841 842 return err; 843 } 844 #endif 845 846 static void acl_handler(uint8_t *packet, uint16_t size){ 847 848 // get info 849 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 850 hci_connection_t *conn = hci_connection_for_handle(con_handle); 851 uint8_t acl_flags = READ_ACL_FLAGS(packet); 852 uint16_t acl_length = READ_ACL_LENGTH(packet); 853 854 // ignore non-registered handle 855 if (!conn){ 856 log_error("acl_handler called with non-registered handle %u!" , con_handle); 857 return; 858 } 859 860 // assert packet is complete 861 if ((acl_length + 4u) != size){ 862 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 863 return; 864 } 865 866 #ifdef ENABLE_CLASSIC 867 // update idle timestamp 868 hci_connection_timestamp(conn); 869 #endif 870 871 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 872 hci_stack->host_completed_packets = 1; 873 conn->num_packets_completed++; 874 #endif 875 876 // handle different packet types 877 switch (acl_flags & 0x03u) { 878 879 case 0x01: // continuation fragment 880 881 // sanity checks 882 if (conn->acl_recombination_pos == 0u) { 883 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 884 return; 885 } 886 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 887 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 888 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 889 conn->acl_recombination_pos = 0; 890 return; 891 } 892 893 // append fragment payload (header already stored) 894 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 895 &packet[4], acl_length); 896 conn->acl_recombination_pos += acl_length; 897 898 // forward complete L2CAP packet if complete. 899 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 900 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 901 // reset recombination buffer 902 conn->acl_recombination_length = 0; 903 conn->acl_recombination_pos = 0; 904 } 905 break; 906 907 case 0x02: { // first fragment 908 909 // sanity check 910 if (conn->acl_recombination_pos) { 911 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 912 conn->acl_recombination_pos = 0; 913 } 914 915 // peek into L2CAP packet! 916 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 917 918 // compare fragment size to L2CAP packet size 919 if (acl_length >= (l2cap_length + 4u)){ 920 // forward fragment as L2CAP packet 921 hci_emit_acl_packet(packet, acl_length + 4u); 922 } else { 923 924 if (acl_length > HCI_ACL_BUFFER_SIZE){ 925 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 926 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 927 return; 928 } 929 930 // store first fragment and tweak acl length for complete package 931 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 932 packet, acl_length + 4u); 933 conn->acl_recombination_pos = acl_length + 4u; 934 conn->acl_recombination_length = l2cap_length; 935 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 936 } 937 break; 938 939 } 940 default: 941 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 942 return; 943 } 944 945 // execute main loop 946 hci_run(); 947 } 948 949 static void hci_shutdown_connection(hci_connection_t *conn){ 950 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 951 952 #ifdef ENABLE_CLASSIC 953 #ifdef ENABLE_SCO_OVER_HCI 954 int addr_type = conn->address_type; 955 #endif 956 #endif 957 958 btstack_run_loop_remove_timer(&conn->timeout); 959 960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 961 btstack_memory_hci_connection_free( conn ); 962 963 // now it's gone 964 hci_emit_nr_connections_changed(); 965 966 #ifdef ENABLE_CLASSIC 967 #ifdef ENABLE_SCO_OVER_HCI 968 // update SCO 969 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 971 } 972 #endif 973 #endif 974 } 975 976 #ifdef ENABLE_CLASSIC 977 978 static const uint16_t packet_type_sizes[] = { 979 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 980 HCI_ACL_DH1_SIZE, 0, 0, 0, 981 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 982 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 983 }; 984 static const uint8_t packet_type_feature_requirement_bit[] = { 985 0, // 3 slot packets 986 1, // 5 slot packets 987 25, // EDR 2 mpbs 988 26, // EDR 3 mbps 989 39, // 3 slot EDR packts 990 40, // 5 slot EDR packet 991 }; 992 static const uint16_t packet_type_feature_packet_mask[] = { 993 0x0f00, // 3 slot packets 994 0xf000, // 5 slot packets 995 0x1102, // EDR 2 mpbs 996 0x2204, // EDR 3 mbps 997 0x0300, // 3 slot EDR packts 998 0x3000, // 5 slot EDR packet 999 }; 1000 1001 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1002 // enable packet types based on size 1003 uint16_t packet_types = 0; 1004 unsigned int i; 1005 for (i=0;i<16;i++){ 1006 if (packet_type_sizes[i] == 0) continue; 1007 if (packet_type_sizes[i] <= buffer_size){ 1008 packet_types |= 1 << i; 1009 } 1010 } 1011 // disable packet types due to missing local supported features 1012 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1013 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1014 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1015 if (feature_set) continue; 1016 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1017 packet_types &= ~packet_type_feature_packet_mask[i]; 1018 } 1019 // flip bits for "may not be used" 1020 packet_types ^= 0x3306; 1021 return packet_types; 1022 } 1023 1024 uint16_t hci_usable_acl_packet_types(void){ 1025 return hci_stack->packet_types; 1026 } 1027 #endif 1028 1029 uint8_t* hci_get_outgoing_packet_buffer(void){ 1030 // hci packet buffer is >= acl data packet length 1031 return hci_stack->hci_packet_buffer; 1032 } 1033 1034 uint16_t hci_max_acl_data_packet_length(void){ 1035 return hci_stack->acl_data_packet_length; 1036 } 1037 1038 #ifdef ENABLE_CLASSIC 1039 int hci_extended_sco_link_supported(void){ 1040 // No. 31, byte 3, bit 7 1041 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1042 } 1043 #endif 1044 1045 int hci_non_flushable_packet_boundary_flag_supported(void){ 1046 // No. 54, byte 6, bit 6 1047 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1048 } 1049 1050 static int gap_ssp_supported(void){ 1051 // No. 51, byte 6, bit 3 1052 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1053 } 1054 1055 static int hci_classic_supported(void){ 1056 #ifdef ENABLE_CLASSIC 1057 // No. 37, byte 4, bit 5, = No BR/EDR Support 1058 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1059 #else 1060 return 0; 1061 #endif 1062 } 1063 1064 static int hci_le_supported(void){ 1065 #ifdef ENABLE_BLE 1066 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1067 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1068 #else 1069 return 0; 1070 #endif 1071 } 1072 1073 #ifdef ENABLE_BLE 1074 1075 /** 1076 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1077 */ 1078 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1079 *addr_type = hci_stack->le_own_addr_type; 1080 if (hci_stack->le_own_addr_type){ 1081 (void)memcpy(addr, hci_stack->le_random_address, 6); 1082 } else { 1083 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1084 } 1085 } 1086 1087 #ifdef ENABLE_LE_CENTRAL 1088 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1089 1090 int offset = 3; 1091 int num_reports = packet[offset]; 1092 offset += 1; 1093 1094 int i; 1095 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1096 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1097 for (i=0; (i<num_reports) && (offset < size);i++){ 1098 // sanity checks on data_length: 1099 uint8_t data_length = packet[offset + 8]; 1100 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1101 if ((offset + 9u + data_length + 1u) > size) return; 1102 // setup event 1103 uint8_t event_size = 10u + data_length; 1104 int pos = 0; 1105 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1106 event[pos++] = event_size; 1107 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1108 offset += 8; 1109 pos += 8; 1110 event[pos++] = packet[offset + 1 + data_length]; // rssi 1111 event[pos++] = data_length; 1112 offset++; 1113 (void)memcpy(&event[pos], &packet[offset], data_length); 1114 pos += data_length; 1115 offset += data_length + 1u; // rssi 1116 hci_emit_event(event, pos, 1); 1117 } 1118 } 1119 #endif 1120 #endif 1121 1122 #ifdef ENABLE_BLE 1123 #ifdef ENABLE_LE_PERIPHERAL 1124 static void hci_update_advertisements_enabled_for_current_roles(void){ 1125 if (hci_stack->le_advertisements_enabled){ 1126 // get number of active le slave connections 1127 int num_slave_connections = 0; 1128 btstack_linked_list_iterator_t it; 1129 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1130 while (btstack_linked_list_iterator_has_next(&it)){ 1131 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1132 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1133 if (con->state != OPEN) continue; 1134 if (con->role != HCI_ROLE_SLAVE) continue; 1135 if (!hci_is_le_connection(con)) continue; 1136 num_slave_connections++; 1137 } 1138 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1139 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1140 } else { 1141 hci_stack->le_advertisements_enabled_for_current_roles = false; 1142 } 1143 } 1144 #endif 1145 #endif 1146 1147 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1148 1149 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1150 if (!hci_stack->config) return 0; 1151 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1152 // Limit baud rate for Broadcom chipsets to 3 mbps 1153 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1154 baud_rate = 3000000; 1155 } 1156 return baud_rate; 1157 } 1158 1159 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1160 UNUSED(ds); 1161 1162 switch (hci_stack->substate){ 1163 case HCI_INIT_W4_SEND_RESET: 1164 log_info("Resend HCI Reset"); 1165 hci_stack->substate = HCI_INIT_SEND_RESET; 1166 hci_stack->num_cmd_packets = 1; 1167 hci_run(); 1168 break; 1169 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1170 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1171 if (hci_stack->hci_transport->reset_link){ 1172 hci_stack->hci_transport->reset_link(); 1173 } 1174 1175 /* fall through */ 1176 1177 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1178 log_info("Resend HCI Reset - CSR Warm Boot"); 1179 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1180 hci_stack->num_cmd_packets = 1; 1181 hci_run(); 1182 break; 1183 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1184 if (hci_stack->hci_transport->set_baudrate){ 1185 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1186 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1187 hci_stack->hci_transport->set_baudrate(baud_rate); 1188 } 1189 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1190 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1191 if (hci_stack->hci_transport->reset_link){ 1192 log_info("Link Reset"); 1193 hci_stack->hci_transport->reset_link(); 1194 } 1195 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1196 hci_run(); 1197 } 1198 break; 1199 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1200 // otherwise continue 1201 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1202 hci_send_cmd(&hci_read_local_supported_commands); 1203 break; 1204 default: 1205 break; 1206 } 1207 } 1208 #endif 1209 1210 static void hci_initializing_next_state(void){ 1211 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1212 } 1213 1214 // assumption: hci_can_send_command_packet_now() == true 1215 static void hci_initializing_run(void){ 1216 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1217 switch (hci_stack->substate){ 1218 case HCI_INIT_SEND_RESET: 1219 hci_state_reset(); 1220 1221 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1222 // prepare reset if command complete not received in 100ms 1223 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1224 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1225 btstack_run_loop_add_timer(&hci_stack->timeout); 1226 #endif 1227 // send command 1228 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1229 hci_send_cmd(&hci_reset); 1230 break; 1231 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1232 hci_send_cmd(&hci_read_local_version_information); 1233 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1234 break; 1235 case HCI_INIT_SEND_READ_LOCAL_NAME: 1236 hci_send_cmd(&hci_read_local_name); 1237 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1238 break; 1239 1240 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1241 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1242 hci_state_reset(); 1243 // prepare reset if command complete not received in 100ms 1244 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1245 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1246 btstack_run_loop_add_timer(&hci_stack->timeout); 1247 // send command 1248 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1249 hci_send_cmd(&hci_reset); 1250 break; 1251 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1252 hci_state_reset(); 1253 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1254 hci_send_cmd(&hci_reset); 1255 break; 1256 case HCI_INIT_SEND_BAUD_CHANGE: { 1257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1258 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1259 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1260 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1261 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1262 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1263 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1264 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1265 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1266 btstack_run_loop_add_timer(&hci_stack->timeout); 1267 } 1268 break; 1269 } 1270 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1271 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1272 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1273 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1274 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1275 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1276 break; 1277 } 1278 case HCI_INIT_CUSTOM_INIT: 1279 // Custom initialization 1280 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1281 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1282 int send_cmd = 0; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = 1; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = 1; 1290 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1291 log_info("CSR Warm Boot"); 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1294 btstack_run_loop_add_timer(&hci_stack->timeout); 1295 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1296 && hci_stack->config 1297 && hci_stack->chipset 1298 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1299 && hci_stack->hci_transport->set_baudrate 1300 && hci_transport_uart_get_main_baud_rate()){ 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1302 } else { 1303 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1304 } 1305 break; 1306 default: 1307 break; 1308 } 1309 1310 if (send_cmd){ 1311 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1312 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1313 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1314 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1315 break; 1316 } 1317 log_info("Init script done"); 1318 1319 // Init script download on Broadcom chipsets causes: 1320 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1321 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1322 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1323 1324 // - baud rate to reset, restore UART baud rate if needed 1325 int need_baud_change = hci_stack->config 1326 && hci_stack->chipset 1327 && hci_stack->chipset->set_baudrate_command 1328 && hci_stack->hci_transport->set_baudrate 1329 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1330 if (need_baud_change) { 1331 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1332 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 1336 uint16_t bcm_delay_ms = 300; 1337 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1338 // -> Work around: wait here. 1339 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1340 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1341 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1342 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1343 btstack_run_loop_add_timer(&hci_stack->timeout); 1344 break; 1345 } 1346 } 1347 // otherwise continue 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_SET_BD_ADDR: 1352 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1353 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1354 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1355 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1356 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1357 break; 1358 #endif 1359 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1361 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1363 hci_send_cmd(&hci_read_local_supported_commands); 1364 break; 1365 case HCI_INIT_READ_BD_ADDR: 1366 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1367 hci_send_cmd(&hci_read_bd_addr); 1368 break; 1369 case HCI_INIT_READ_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1371 hci_send_cmd(&hci_read_buffer_size); 1372 break; 1373 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1375 hci_send_cmd(&hci_read_local_supported_features); 1376 break; 1377 1378 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1379 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1380 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1381 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1382 break; 1383 case HCI_INIT_HOST_BUFFER_SIZE: 1384 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1385 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1386 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1387 break; 1388 #endif 1389 1390 case HCI_INIT_SET_EVENT_MASK: 1391 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1392 if (hci_le_supported()){ 1393 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1394 } else { 1395 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1396 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1397 } 1398 break; 1399 1400 #ifdef ENABLE_CLASSIC 1401 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1403 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1404 break; 1405 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1407 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1408 break; 1409 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1411 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1412 break; 1413 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1415 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1416 break; 1417 case HCI_INIT_WRITE_LOCAL_NAME: { 1418 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1419 hci_reserve_packet_buffer(); 1420 uint8_t * packet = hci_stack->hci_packet_buffer; 1421 // construct HCI Command and send 1422 uint16_t opcode = hci_write_local_name.opcode; 1423 hci_stack->last_cmd_opcode = opcode; 1424 packet[0] = opcode & 0xff; 1425 packet[1] = opcode >> 8; 1426 packet[2] = DEVICE_NAME_LEN; 1427 memset(&packet[3], 0, DEVICE_NAME_LEN); 1428 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1429 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1430 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1431 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1432 // expand '00:00:00:00:00:00' in name with bd_addr 1433 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1434 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1435 break; 1436 } 1437 case HCI_INIT_WRITE_EIR_DATA: { 1438 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1439 hci_reserve_packet_buffer(); 1440 uint8_t * packet = hci_stack->hci_packet_buffer; 1441 // construct HCI Command in-place and send 1442 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1443 hci_stack->last_cmd_opcode = opcode; 1444 uint16_t offset = 0; 1445 packet[offset++] = opcode & 0xff; 1446 packet[offset++] = opcode >> 8; 1447 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1448 packet[offset++] = 0; // FEC not required 1449 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1450 if (hci_stack->eir_data){ 1451 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1452 ad_context_t context; 1453 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1454 uint8_t data_type = ad_iterator_get_data_type(&context); 1455 uint8_t size = ad_iterator_get_data_len(&context); 1456 const uint8_t *data = ad_iterator_get_data(&context); 1457 // copy item 1458 packet[offset++] = size + 1; 1459 packet[offset++] = data_type; 1460 memcpy(&packet[offset], data, size); 1461 // update name item 1462 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1463 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1464 } 1465 offset += size; 1466 } 1467 } else { 1468 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1469 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1470 packet[offset++] = bytes_to_copy + 1; 1471 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1472 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1473 // expand '00:00:00:00:00:00' in name with bd_addr 1474 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1475 } 1476 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 break; 1478 } 1479 case HCI_INIT_WRITE_INQUIRY_MODE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1481 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1482 break; 1483 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1484 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1485 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1486 break; 1487 case HCI_INIT_WRITE_SCAN_ENABLE: 1488 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1489 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1490 break; 1491 // only sent if ENABLE_SCO_OVER_HCI is defined 1492 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1493 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1494 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1495 break; 1496 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1497 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1498 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1499 break; 1500 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1501 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1502 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1503 log_info("BCM: Route SCO data via HCI transport"); 1504 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1505 break; 1506 1507 #endif 1508 #ifdef ENABLE_BLE 1509 // LE INIT 1510 case HCI_INIT_LE_READ_BUFFER_SIZE: 1511 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1512 hci_send_cmd(&hci_le_read_buffer_size); 1513 break; 1514 case HCI_INIT_LE_SET_EVENT_MASK: 1515 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1516 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1517 break; 1518 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1519 // LE Supported Host = 1, Simultaneous Host = 0 1520 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1521 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1522 break; 1523 #endif 1524 1525 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1526 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1527 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1528 hci_send_cmd(&hci_le_read_maximum_data_length); 1529 break; 1530 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1531 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1532 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1533 break; 1534 #endif 1535 1536 #ifdef ENABLE_LE_CENTRAL 1537 case HCI_INIT_READ_WHITE_LIST_SIZE: 1538 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1539 hci_send_cmd(&hci_le_read_white_list_size); 1540 break; 1541 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1542 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1543 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); 1544 break; 1545 #endif 1546 default: 1547 return; 1548 } 1549 } 1550 1551 static void hci_init_done(void){ 1552 // done. tell the app 1553 log_info("hci_init_done -> HCI_STATE_WORKING"); 1554 hci_stack->state = HCI_STATE_WORKING; 1555 hci_emit_state(); 1556 hci_run(); 1557 } 1558 1559 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1560 bool command_completed = false; 1561 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1562 uint16_t opcode = little_endian_read_16(packet,3); 1563 if (opcode == hci_stack->last_cmd_opcode){ 1564 command_completed = true; 1565 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1566 } else { 1567 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1568 } 1569 } 1570 1571 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1572 uint8_t status = packet[2]; 1573 uint16_t opcode = little_endian_read_16(packet,4); 1574 if (opcode == hci_stack->last_cmd_opcode){ 1575 if (status){ 1576 command_completed = true; 1577 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1578 } else { 1579 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1580 } 1581 } else { 1582 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1583 } 1584 } 1585 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1586 // Vendor == CSR 1587 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1588 // TODO: track actual command 1589 command_completed = true; 1590 } 1591 1592 // Vendor == Toshiba 1593 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1594 // TODO: track actual command 1595 command_completed = true; 1596 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1597 hci_stack->num_cmd_packets = 1; 1598 } 1599 #endif 1600 1601 return command_completed; 1602 } 1603 1604 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1605 1606 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1607 1608 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1609 1610 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1611 1612 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1613 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1614 // 1615 // HCI Reset 1616 // Timeout 100 ms 1617 // HCI Reset 1618 // Command Complete Reset 1619 // HCI Read Local Version Information 1620 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1621 // hang... 1622 // 1623 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1624 if (!command_completed 1625 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1626 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1627 1628 uint16_t opcode = little_endian_read_16(packet,3); 1629 if (opcode == hci_reset.opcode){ 1630 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1631 return; 1632 } 1633 } 1634 1635 // CSR & H5 1636 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1637 if (!command_completed 1638 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1639 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1640 1641 uint16_t opcode = little_endian_read_16(packet,3); 1642 if (opcode == hci_reset.opcode){ 1643 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1644 return; 1645 } 1646 } 1647 1648 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1649 // fix: Correct substate and behave as command below 1650 if (command_completed){ 1651 switch (hci_stack->substate){ 1652 case HCI_INIT_SEND_RESET: 1653 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1654 break; 1655 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1656 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1657 break; 1658 default: 1659 break; 1660 } 1661 } 1662 1663 #endif 1664 1665 if (!command_completed) return; 1666 1667 bool need_baud_change = false; 1668 bool need_addr_change = false; 1669 1670 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1671 need_baud_change = hci_stack->config 1672 && hci_stack->chipset 1673 && hci_stack->chipset->set_baudrate_command 1674 && hci_stack->hci_transport->set_baudrate 1675 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1676 1677 need_addr_change = hci_stack->custom_bd_addr_set 1678 && hci_stack->chipset 1679 && hci_stack->chipset->set_bd_addr_command; 1680 #endif 1681 1682 switch(hci_stack->substate){ 1683 1684 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1685 case HCI_INIT_SEND_RESET: 1686 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1687 // fix: just correct substate and behave as command below 1688 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1689 btstack_run_loop_remove_timer(&hci_stack->timeout); 1690 break; 1691 case HCI_INIT_W4_SEND_RESET: 1692 btstack_run_loop_remove_timer(&hci_stack->timeout); 1693 break; 1694 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1695 log_info("Received local name, need baud change %d", (int) need_baud_change); 1696 if (need_baud_change){ 1697 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1698 return; 1699 } 1700 // skip baud change 1701 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1702 return; 1703 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1704 // for STLC2500D, baud rate change already happened. 1705 // for others, baud rate gets changed now 1706 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1707 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1708 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1709 hci_stack->hci_transport->set_baudrate(baud_rate); 1710 } 1711 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1712 return; 1713 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1714 btstack_run_loop_remove_timer(&hci_stack->timeout); 1715 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1716 return; 1717 case HCI_INIT_W4_CUSTOM_INIT: 1718 // repeat custom init 1719 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1720 return; 1721 #else 1722 case HCI_INIT_W4_SEND_RESET: 1723 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1724 return ; 1725 #endif 1726 1727 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1728 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1729 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1730 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1731 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1732 return; 1733 } 1734 if (need_addr_change){ 1735 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1736 return; 1737 } 1738 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1739 return; 1740 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1741 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1742 if (need_baud_change){ 1743 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1744 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1745 hci_stack->hci_transport->set_baudrate(baud_rate); 1746 } 1747 if (need_addr_change){ 1748 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1749 return; 1750 } 1751 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1752 return; 1753 case HCI_INIT_W4_SET_BD_ADDR: 1754 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1755 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1756 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1757 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1758 return; 1759 } 1760 // skipping st warm boot 1761 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1762 return; 1763 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1764 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1765 return; 1766 #endif 1767 case HCI_INIT_W4_READ_BD_ADDR: 1768 // only read buffer size if supported 1769 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1770 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1771 return; 1772 } 1773 // skipping read buffer size 1774 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1775 return; 1776 case HCI_INIT_W4_SET_EVENT_MASK: 1777 // skip Classic init commands for LE only chipsets 1778 if (!hci_classic_supported()){ 1779 #ifdef ENABLE_BLE 1780 if (hci_le_supported()){ 1781 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1782 return; 1783 } 1784 #endif 1785 log_error("Neither BR/EDR nor LE supported"); 1786 hci_init_done(); 1787 return; 1788 } 1789 if (!gap_ssp_supported()){ 1790 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1791 return; 1792 } 1793 break; 1794 #ifdef ENABLE_BLE 1795 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1796 // skip write le host if not supported (e.g. on LE only EM9301) 1797 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1798 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1799 return; 1800 1801 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1802 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1803 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1804 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1805 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1806 return; 1807 } 1808 // explicit fall through to reduce repetitions 1809 1810 #ifdef ENABLE_LE_CENTRAL 1811 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1812 #else 1813 hci_init_done(); 1814 #endif 1815 return; 1816 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1817 1818 #endif /* ENABLE_BLE */ 1819 1820 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1821 // skip write secure connections host support if not supported or disabled 1822 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1823 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1824 return; 1825 } 1826 break; 1827 1828 #ifdef ENABLE_SCO_OVER_HCI 1829 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1830 // skip write synchronous flow control if not supported 1831 if (hci_stack->local_supported_commands[0] & 0x04) break; 1832 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1833 1834 /* fall through */ 1835 1836 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1837 // skip write default erroneous data reporting if not supported 1838 if (hci_stack->local_supported_commands[0] & 0x08) break; 1839 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1844 // skip bcm set sco pcm config on non-Broadcom chipsets 1845 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1846 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1847 1848 /* fall through */ 1849 1850 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1851 if (!hci_le_supported()){ 1852 // SKIP LE init for Classic only configuration 1853 hci_init_done(); 1854 return; 1855 } 1856 break; 1857 1858 #else /* !ENABLE_SCO_OVER_HCI */ 1859 1860 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1861 #ifdef ENABLE_BLE 1862 if (hci_le_supported()){ 1863 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1864 return; 1865 } 1866 #endif 1867 // SKIP LE init for Classic only configuration 1868 hci_init_done(); 1869 return; 1870 #endif /* ENABLE_SCO_OVER_HCI */ 1871 1872 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1873 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1874 // Response to command before init done state -> init done 1875 case (HCI_INIT_DONE-1): 1876 hci_init_done(); 1877 return; 1878 #endif 1879 1880 default: 1881 break; 1882 } 1883 hci_initializing_next_state(); 1884 } 1885 1886 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1887 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1888 bd_addr_t bd_address; 1889 (void)memcpy(&bd_address, conn->address, 6); 1890 1891 #ifdef ENABLE_CLASSIC 1892 // cache needed data 1893 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1894 #endif 1895 1896 // connection failed, remove entry 1897 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1898 btstack_memory_hci_connection_free( conn ); 1899 1900 #ifdef ENABLE_CLASSIC 1901 // notify client if dedicated bonding 1902 if (notify_dedicated_bonding_failed){ 1903 log_info("hci notify_dedicated_bonding_failed"); 1904 hci_emit_dedicated_bonding_result(bd_address, status); 1905 } 1906 1907 // if authentication error, also delete link key 1908 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1909 gap_drop_link_key_for_bd_addr(bd_address); 1910 } 1911 #else 1912 UNUSED(status); 1913 #endif 1914 } 1915 1916 #ifdef ENABLE_CLASSIC 1917 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1918 // SSP Controller 1919 if (features[6] & (1 << 3)){ 1920 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1921 } 1922 // eSCO 1923 if (features[3] & (1<<7)){ 1924 conn->remote_supported_features[0] |= 1; 1925 } 1926 // Extended features 1927 if (features[7] & (1<<7)){ 1928 conn->remote_supported_features[0] |= 2; 1929 } 1930 } 1931 1932 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1933 // SSP Host 1934 if (features[0] & (1 << 0)){ 1935 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1936 } 1937 // SC Host 1938 if (features[0] & (1 << 3)){ 1939 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1940 } 1941 } 1942 1943 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1944 // SC Controller 1945 if (features[1] & (1 << 0)){ 1946 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1947 } 1948 } 1949 1950 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1951 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1952 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1953 if (conn->bonding_flags & BONDING_DEDICATED){ 1954 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1955 } 1956 } 1957 #endif 1958 1959 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1960 // handle BT initialization 1961 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1962 hci_initializing_event_handler(packet, size); 1963 } 1964 1965 // help with BT sleep 1966 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1967 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1968 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1969 hci_initializing_next_state(); 1970 } 1971 } 1972 1973 #ifdef ENABLE_CLASSIC 1974 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1975 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1976 conn->encryption_key_size = encryption_key_size; 1977 1978 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1979 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1980 return; 1981 } 1982 1983 // Request Authentication if not already done 1984 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1985 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1986 } 1987 #endif 1988 1989 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1990 UNUSED(size); 1991 1992 uint16_t manufacturer; 1993 #ifdef ENABLE_CLASSIC 1994 hci_con_handle_t handle; 1995 hci_connection_t * conn; 1996 uint8_t status; 1997 #endif 1998 // get num cmd packets - limit to 1 to reduce complexity 1999 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2000 2001 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2002 switch (opcode){ 2003 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2004 if (packet[5]) break; 2005 // terminate, name 248 chars 2006 packet[6+248] = 0; 2007 log_info("local name: %s", &packet[6]); 2008 break; 2009 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2010 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2011 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2012 uint16_t acl_len = little_endian_read_16(packet, 6); 2013 uint16_t sco_len = packet[8]; 2014 2015 // determine usable ACL/SCO payload size 2016 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2017 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2018 2019 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2020 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2021 2022 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2023 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2024 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2025 } 2026 break; 2027 case HCI_OPCODE_HCI_READ_RSSI: 2028 if (packet[5] == ERROR_CODE_SUCCESS){ 2029 uint8_t event[5]; 2030 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2031 event[1] = 3; 2032 (void)memcpy(&event[2], &packet[6], 3); 2033 hci_emit_event(event, sizeof(event), 1); 2034 } 2035 break; 2036 #ifdef ENABLE_BLE 2037 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2038 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2039 hci_stack->le_acl_packets_total_num = packet[8]; 2040 // determine usable ACL payload size 2041 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2042 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2043 } 2044 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2045 break; 2046 #endif 2047 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2048 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2049 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2050 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2051 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); 2052 break; 2053 #endif 2054 #ifdef ENABLE_LE_CENTRAL 2055 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2056 hci_stack->le_whitelist_capacity = packet[6]; 2057 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2058 break; 2059 #endif 2060 case HCI_OPCODE_HCI_READ_BD_ADDR: 2061 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2062 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)); 2063 #ifdef ENABLE_CLASSIC 2064 if (hci_stack->link_key_db){ 2065 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2066 } 2067 #endif 2068 break; 2069 #ifdef ENABLE_CLASSIC 2070 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2071 hci_emit_discoverable_enabled(hci_stack->discoverable); 2072 break; 2073 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2074 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2075 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2076 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2077 hci_emit_event(event, sizeof(event), 1); 2078 } 2079 break; 2080 #endif 2081 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2082 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2083 2084 #ifdef ENABLE_CLASSIC 2085 // determine usable ACL packet types based on host buffer size and supported features 2086 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2087 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2088 #endif 2089 // Classic/LE 2090 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2091 break; 2092 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2093 manufacturer = little_endian_read_16(packet, 10); 2094 // map Cypress to Broadcom 2095 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2096 log_info("Treat Cypress as Broadcom"); 2097 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2098 little_endian_store_16(packet, 10, manufacturer); 2099 } 2100 hci_stack->manufacturer = manufacturer; 2101 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2102 break; 2103 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2104 hci_stack->local_supported_commands[0] = 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2106 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2110 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2111 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2112 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2113 hci_stack->local_supported_commands[1] = 2114 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2115 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2116 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2117 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2118 break; 2119 #ifdef ENABLE_CLASSIC 2120 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2121 if (packet[5]) return; 2122 hci_stack->synchronous_flow_control_enabled = 1; 2123 break; 2124 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2125 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2126 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2127 conn = hci_connection_for_handle(handle); 2128 if (conn != NULL) { 2129 uint8_t key_size = 0; 2130 if (status == 0){ 2131 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2132 log_info("Handle %04x key Size: %u", handle, key_size); 2133 } else { 2134 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2135 } 2136 hci_handle_read_encryption_key_size_complete(conn, key_size); 2137 } 2138 break; 2139 #endif 2140 default: 2141 break; 2142 } 2143 } 2144 2145 #ifdef ENABLE_BLE 2146 static void event_handle_le_connection_complete(const uint8_t * packet){ 2147 bd_addr_t addr; 2148 bd_addr_type_t addr_type; 2149 hci_connection_t * conn; 2150 2151 // Connection management 2152 reverse_bd_addr(&packet[8], addr); 2153 addr_type = (bd_addr_type_t)packet[7]; 2154 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2155 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2156 2157 #ifdef ENABLE_LE_CENTRAL 2158 // handle error: error is reported only to the initiator -> outgoing connection 2159 if (packet[3]){ 2160 2161 // handle cancelled outgoing connection 2162 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2163 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2164 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2165 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2166 // whitelist connect 2167 if (hci_is_le_connection_type(addr_type)){ 2168 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2169 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2170 } 2171 // get outgoing connection conn struct for direct connect 2172 conn = gap_get_outgoing_connection(); 2173 } 2174 2175 // outgoing le connection establishment is done 2176 if (conn){ 2177 // remove entry 2178 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2179 btstack_memory_hci_connection_free( conn ); 2180 } 2181 return; 2182 } 2183 #endif 2184 2185 // on success, both hosts receive connection complete event 2186 if (packet[6] == HCI_ROLE_MASTER){ 2187 #ifdef ENABLE_LE_CENTRAL 2188 // if we're master on an le connection, it was an outgoing connection and we're done with it 2189 // note: no hci_connection_t object exists yet for connect with whitelist 2190 if (hci_is_le_connection_type(addr_type)){ 2191 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2192 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2193 } 2194 #endif 2195 } else { 2196 #ifdef ENABLE_LE_PERIPHERAL 2197 // if we're slave, it was an incoming connection, advertisements have stopped 2198 hci_stack->le_advertisements_active = false; 2199 #endif 2200 } 2201 2202 // LE connections are auto-accepted, so just create a connection if there isn't one already 2203 if (!conn){ 2204 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2205 } 2206 2207 // no memory, sorry. 2208 if (!conn){ 2209 return; 2210 } 2211 2212 conn->state = OPEN; 2213 conn->role = packet[6]; 2214 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2215 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2216 2217 #ifdef ENABLE_LE_PERIPHERAL 2218 if (packet[6] == HCI_ROLE_SLAVE){ 2219 hci_update_advertisements_enabled_for_current_roles(); 2220 } 2221 #endif 2222 2223 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2224 2225 // restart timer 2226 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2227 // btstack_run_loop_add_timer(&conn->timeout); 2228 2229 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2230 2231 hci_emit_nr_connections_changed(); 2232 } 2233 #endif 2234 2235 static void event_handler(uint8_t *packet, uint16_t size){ 2236 2237 uint16_t event_length = packet[1]; 2238 2239 // assert packet is complete 2240 if (size != (event_length + 2u)){ 2241 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2242 return; 2243 } 2244 2245 bd_addr_t addr; 2246 bd_addr_type_t addr_type; 2247 hci_con_handle_t handle; 2248 hci_connection_t * conn; 2249 int i; 2250 int create_connection_cmd; 2251 2252 #ifdef ENABLE_CLASSIC 2253 uint8_t link_type; 2254 #endif 2255 2256 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2257 2258 switch (hci_event_packet_get_type(packet)) { 2259 2260 case HCI_EVENT_COMMAND_COMPLETE: 2261 handle_command_complete_event(packet, size); 2262 break; 2263 2264 case HCI_EVENT_COMMAND_STATUS: 2265 // get num cmd packets - limit to 1 to reduce complexity 2266 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2267 2268 // check command status to detected failed outgoing connections 2269 create_connection_cmd = 0; 2270 #ifdef ENABLE_CLASSIC 2271 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2272 create_connection_cmd = 1; 2273 } 2274 #endif 2275 #ifdef ENABLE_LE_CENTRAL 2276 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2277 create_connection_cmd = 1; 2278 } 2279 #endif 2280 if (create_connection_cmd) { 2281 uint8_t status = hci_event_command_status_get_status(packet); 2282 addr_type = hci_stack->outgoing_addr_type; 2283 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2284 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); 2285 2286 // reset outgoing address info 2287 memset(hci_stack->outgoing_addr, 0, 6); 2288 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2289 2290 // on error 2291 if (status != ERROR_CODE_SUCCESS){ 2292 #ifdef ENABLE_LE_CENTRAL 2293 if (hci_is_le_connection_type(addr_type)){ 2294 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2295 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2296 } 2297 #endif 2298 // error => outgoing connection failed 2299 if (conn != NULL){ 2300 hci_handle_connection_failed(conn, status); 2301 } 2302 } 2303 } 2304 break; 2305 2306 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2307 if (size < 3) return; 2308 uint16_t num_handles = packet[2]; 2309 if (size != (3u + num_handles * 4u)) return; 2310 uint16_t offset = 3; 2311 for (i=0; i<num_handles;i++){ 2312 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2313 offset += 2u; 2314 uint16_t num_packets = little_endian_read_16(packet, offset); 2315 offset += 2u; 2316 2317 conn = hci_connection_for_handle(handle); 2318 if (!conn){ 2319 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2320 continue; 2321 } 2322 2323 if (conn->num_packets_sent >= num_packets){ 2324 conn->num_packets_sent -= num_packets; 2325 } else { 2326 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2327 conn->num_packets_sent = 0; 2328 } 2329 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2330 2331 #ifdef ENABLE_CLASSIC 2332 // For SCO, we do the can_send_now_check here 2333 hci_notify_if_sco_can_send_now(); 2334 #endif 2335 } 2336 break; 2337 } 2338 2339 #ifdef ENABLE_CLASSIC 2340 case HCI_EVENT_INQUIRY_COMPLETE: 2341 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2342 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2343 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2344 hci_emit_event(event, sizeof(event), 1); 2345 } 2346 break; 2347 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2348 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2349 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2350 } 2351 break; 2352 case HCI_EVENT_CONNECTION_REQUEST: 2353 reverse_bd_addr(&packet[2], addr); 2354 if (hci_stack->gap_classic_accept_callback != NULL){ 2355 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2356 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2357 bd_addr_copy(hci_stack->decline_addr, addr); 2358 break; 2359 } 2360 } 2361 2362 // TODO: eval COD 8-10 2363 link_type = packet[11]; 2364 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2365 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2366 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2367 if (!conn) { 2368 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2369 } 2370 if (!conn) { 2371 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2372 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2373 bd_addr_copy(hci_stack->decline_addr, addr); 2374 break; 2375 } 2376 conn->role = HCI_ROLE_SLAVE; 2377 conn->state = RECEIVED_CONNECTION_REQUEST; 2378 // store info about eSCO 2379 if (link_type == 0x02){ 2380 conn->remote_supported_features[0] |= 1; 2381 } 2382 hci_run(); 2383 break; 2384 2385 case HCI_EVENT_CONNECTION_COMPLETE: 2386 // Connection management 2387 reverse_bd_addr(&packet[5], addr); 2388 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2389 addr_type = BD_ADDR_TYPE_ACL; 2390 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2391 if (conn) { 2392 if (!packet[2]){ 2393 conn->state = OPEN; 2394 conn->con_handle = little_endian_read_16(packet, 3); 2395 2396 // queue get remote feature 2397 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2398 2399 // queue set supervision timeout if we're master 2400 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2401 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2402 } 2403 2404 // restart timer 2405 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2406 btstack_run_loop_add_timer(&conn->timeout); 2407 2408 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2409 2410 hci_emit_nr_connections_changed(); 2411 } else { 2412 // connection failed 2413 hci_handle_connection_failed(conn, packet[2]); 2414 } 2415 } 2416 break; 2417 2418 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2419 reverse_bd_addr(&packet[5], addr); 2420 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2421 if (packet[2]){ 2422 // connection failed 2423 break; 2424 } 2425 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2426 if (!conn) { 2427 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2428 } 2429 if (!conn) { 2430 break; 2431 } 2432 conn->state = OPEN; 2433 conn->con_handle = little_endian_read_16(packet, 3); 2434 2435 #ifdef ENABLE_SCO_OVER_HCI 2436 // update SCO 2437 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2438 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2439 } 2440 // trigger can send now 2441 if (hci_have_usb_transport()){ 2442 hci_stack->sco_can_send_now = 1; 2443 } 2444 #endif 2445 break; 2446 2447 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2448 handle = little_endian_read_16(packet, 3); 2449 conn = hci_connection_for_handle(handle); 2450 if (!conn) break; 2451 if (!packet[2]){ 2452 const uint8_t * features = &packet[5]; 2453 hci_handle_remote_features_page_0(conn, features); 2454 2455 // read extended features if possible 2456 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2457 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2458 break; 2459 } 2460 } 2461 hci_handle_remote_features_received(conn); 2462 break; 2463 2464 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2465 handle = little_endian_read_16(packet, 3); 2466 conn = hci_connection_for_handle(handle); 2467 if (!conn) break; 2468 // status = ok, page = 1 2469 if (!packet[2]) { 2470 uint8_t page_number = packet[5]; 2471 uint8_t maximum_page_number = packet[6]; 2472 const uint8_t * features = &packet[7]; 2473 bool done = false; 2474 switch (page_number){ 2475 case 1: 2476 hci_handle_remote_features_page_1(conn, features); 2477 if (maximum_page_number >= 2){ 2478 // get Secure Connections (Controller) from Page 2 if available 2479 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2480 } else { 2481 // otherwise, assume SC (Controller) == SC (Host) 2482 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2483 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2484 } 2485 done = true; 2486 } 2487 break; 2488 case 2: 2489 hci_handle_remote_features_page_2(conn, features); 2490 done = true; 2491 break; 2492 default: 2493 break; 2494 } 2495 if (!done) break; 2496 } 2497 hci_handle_remote_features_received(conn); 2498 break; 2499 2500 case HCI_EVENT_LINK_KEY_REQUEST: 2501 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2502 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2503 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2504 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2505 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2506 hci_run(); 2507 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2508 return; 2509 2510 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2511 reverse_bd_addr(&packet[2], addr); 2512 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2513 if (!conn) break; 2514 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2515 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2516 // Change Connection Encryption keeps link key type 2517 if (link_key_type != CHANGED_COMBINATION_KEY){ 2518 conn->link_key_type = link_key_type; 2519 } 2520 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2521 // still forward event to allow dismiss of pairing dialog 2522 break; 2523 } 2524 2525 case HCI_EVENT_PIN_CODE_REQUEST: 2526 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2527 // non-bondable mode: pin code negative reply will be sent 2528 if (!hci_stack->bondable){ 2529 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2530 hci_run(); 2531 return; 2532 } 2533 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2534 if (!hci_stack->link_key_db) break; 2535 hci_event_pin_code_request_get_bd_addr(packet, addr); 2536 hci_stack->link_key_db->delete_link_key(addr); 2537 break; 2538 2539 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2540 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2541 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2542 break; 2543 2544 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2545 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2546 if (!hci_stack->ssp_auto_accept) break; 2547 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2548 break; 2549 2550 case HCI_EVENT_USER_PASSKEY_REQUEST: 2551 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2552 if (!hci_stack->ssp_auto_accept) break; 2553 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2554 break; 2555 case HCI_EVENT_MODE_CHANGE: 2556 handle = hci_event_mode_change_get_handle(packet); 2557 conn = hci_connection_for_handle(handle); 2558 if (!conn) break; 2559 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2560 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2561 break; 2562 #endif 2563 2564 case HCI_EVENT_ENCRYPTION_CHANGE: 2565 handle = hci_event_encryption_change_get_connection_handle(packet); 2566 conn = hci_connection_for_handle(handle); 2567 if (!conn) break; 2568 if (hci_event_encryption_change_get_status(packet) == 0u) { 2569 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2570 if (encryption_enabled){ 2571 if (hci_is_le_connection(conn)){ 2572 // For LE, we accept connection as encrypted 2573 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2574 } 2575 #ifdef ENABLE_CLASSIC 2576 else { 2577 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2578 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2579 bool connected_uses_aes_ccm = encryption_enabled == 2; 2580 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2581 log_info("SC during pairing, but only E0 now -> abort"); 2582 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2583 break; 2584 } 2585 2586 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2587 if (connected_uses_aes_ccm){ 2588 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2589 } 2590 2591 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2592 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2593 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2594 } else { 2595 // if not, pretend everything is perfect 2596 hci_handle_read_encryption_key_size_complete(conn, 16); 2597 } 2598 } 2599 #endif 2600 } else { 2601 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2602 } 2603 } 2604 2605 break; 2606 2607 #ifdef ENABLE_CLASSIC 2608 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2609 handle = hci_event_authentication_complete_get_connection_handle(packet); 2610 conn = hci_connection_for_handle(handle); 2611 if (!conn) break; 2612 2613 // ignore authentication event if we didn't request it 2614 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2615 2616 // dedicated bonding: send result and disconnect 2617 if (conn->bonding_flags & BONDING_DEDICATED){ 2618 conn->bonding_flags &= ~BONDING_DEDICATED; 2619 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2620 conn->bonding_status = packet[2]; 2621 break; 2622 } 2623 2624 // authenticated only if auth status == 0 2625 if (hci_event_authentication_complete_get_status(packet) == 0){ 2626 // authenticated 2627 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2628 2629 // If link key sufficient for requested security and not already encrypted, start encryption 2630 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2631 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2632 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2633 break; 2634 } 2635 } 2636 2637 // emit updated security level 2638 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2639 break; 2640 #endif 2641 2642 // HCI_EVENT_DISCONNECTION_COMPLETE 2643 // has been split, to first notify stack before shutting connection down 2644 // see end of function, too. 2645 case HCI_EVENT_DISCONNECTION_COMPLETE: 2646 if (packet[2]) break; // status != 0 2647 handle = little_endian_read_16(packet, 3); 2648 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2649 if (hci_stack->acl_fragmentation_total_size > 0u) { 2650 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2651 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2652 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2653 hci_stack->acl_fragmentation_total_size = 0; 2654 hci_stack->acl_fragmentation_pos = 0; 2655 if (release_buffer){ 2656 hci_release_packet_buffer(); 2657 } 2658 } 2659 } 2660 2661 conn = hci_connection_for_handle(handle); 2662 if (!conn) break; 2663 // mark connection for shutdown 2664 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2665 2666 // emit dedicatd bonding event 2667 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2668 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2669 } 2670 2671 #ifdef ENABLE_BLE 2672 #ifdef ENABLE_LE_PERIPHERAL 2673 // re-enable advertisements for le connections if active 2674 if (hci_is_le_connection(conn)){ 2675 hci_update_advertisements_enabled_for_current_roles(); 2676 } 2677 #endif 2678 #endif 2679 break; 2680 2681 case HCI_EVENT_HARDWARE_ERROR: 2682 log_error("Hardware Error: 0x%02x", packet[2]); 2683 if (hci_stack->hardware_error_callback){ 2684 (*hci_stack->hardware_error_callback)(packet[2]); 2685 } else { 2686 // if no special requests, just reboot stack 2687 hci_power_control_off(); 2688 hci_power_control_on(); 2689 } 2690 break; 2691 2692 #ifdef ENABLE_CLASSIC 2693 case HCI_EVENT_ROLE_CHANGE: 2694 if (packet[2]) break; // status != 0 2695 reverse_bd_addr(&packet[3], addr); 2696 addr_type = BD_ADDR_TYPE_ACL; 2697 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2698 if (!conn) break; 2699 conn->role = packet[9]; 2700 break; 2701 #endif 2702 2703 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2704 // release packet buffer only for asynchronous transport and if there are not further fragements 2705 if (hci_transport_synchronous()) { 2706 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2707 return; // instead of break: to avoid re-entering hci_run() 2708 } 2709 hci_stack->acl_fragmentation_tx_active = 0; 2710 if (hci_stack->acl_fragmentation_total_size) break; 2711 hci_release_packet_buffer(); 2712 2713 // L2CAP receives this event via the hci_emit_event below 2714 2715 #ifdef ENABLE_CLASSIC 2716 // For SCO, we do the can_send_now_check here 2717 hci_notify_if_sco_can_send_now(); 2718 #endif 2719 break; 2720 2721 #ifdef ENABLE_CLASSIC 2722 case HCI_EVENT_SCO_CAN_SEND_NOW: 2723 // For SCO, we do the can_send_now_check here 2724 hci_stack->sco_can_send_now = 1; 2725 hci_notify_if_sco_can_send_now(); 2726 return; 2727 2728 // explode inquriy results for easier consumption 2729 case HCI_EVENT_INQUIRY_RESULT: 2730 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2731 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2732 gap_inquiry_explode(packet, size); 2733 break; 2734 #endif 2735 2736 #ifdef ENABLE_BLE 2737 case HCI_EVENT_LE_META: 2738 switch (packet[2]){ 2739 #ifdef ENABLE_LE_CENTRAL 2740 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2741 // log_info("advertising report received"); 2742 if (!hci_stack->le_scanning_enabled) break; 2743 le_handle_advertisement_report(packet, size); 2744 break; 2745 #endif 2746 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2747 event_handle_le_connection_complete(packet); 2748 break; 2749 2750 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2751 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2752 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2753 conn = hci_connection_for_handle(handle); 2754 if (!conn) break; 2755 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2756 break; 2757 2758 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2759 // connection 2760 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2761 conn = hci_connection_for_handle(handle); 2762 if (conn) { 2763 // read arguments 2764 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2765 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2766 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2767 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2768 2769 // validate against current connection parameter range 2770 le_connection_parameter_range_t existing_range; 2771 gap_get_connection_parameter_range(&existing_range); 2772 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2773 if (update_parameter){ 2774 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2775 conn->le_conn_interval_min = le_conn_interval_min; 2776 conn->le_conn_interval_max = le_conn_interval_max; 2777 conn->le_conn_latency = le_conn_latency; 2778 conn->le_supervision_timeout = le_supervision_timeout; 2779 } else { 2780 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2781 } 2782 } 2783 break; 2784 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2785 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2786 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2787 conn = hci_connection_for_handle(handle); 2788 if (conn) { 2789 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2790 } 2791 break; 2792 #endif 2793 default: 2794 break; 2795 } 2796 break; 2797 #endif 2798 case HCI_EVENT_VENDOR_SPECIFIC: 2799 // Vendor specific commands often create vendor specific event instead of num completed packets 2800 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2801 switch (hci_stack->manufacturer){ 2802 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2803 hci_stack->num_cmd_packets = 1; 2804 break; 2805 default: 2806 break; 2807 } 2808 break; 2809 default: 2810 break; 2811 } 2812 2813 handle_event_for_current_stack_state(packet, size); 2814 2815 // notify upper stack 2816 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2817 2818 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2819 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2820 handle = little_endian_read_16(packet, 3); 2821 hci_connection_t * aConn = hci_connection_for_handle(handle); 2822 // discard connection if app did not trigger a reconnect in the event handler 2823 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2824 hci_shutdown_connection(aConn); 2825 } 2826 } 2827 2828 // execute main loop 2829 hci_run(); 2830 } 2831 2832 #ifdef ENABLE_CLASSIC 2833 2834 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2835 static void sco_schedule_tx(hci_connection_t * conn); 2836 2837 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2838 log_debug("SCO TX Timeout"); 2839 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2840 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2841 if (!conn) return; 2842 2843 // trigger send 2844 conn->sco_tx_ready = 1; 2845 // extra packet if CVSD but SCO buffer is too short 2846 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2847 conn->sco_tx_ready++; 2848 } 2849 hci_notify_if_sco_can_send_now(); 2850 } 2851 2852 2853 #define SCO_TX_AFTER_RX_MS (6) 2854 2855 static void sco_schedule_tx(hci_connection_t * conn){ 2856 2857 uint32_t now = btstack_run_loop_get_time_ms(); 2858 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2859 int time_delta_ms = sco_tx_ms - now; 2860 2861 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2862 2863 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2864 btstack_run_loop_set_timer(timer, time_delta_ms); 2865 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2866 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2867 btstack_run_loop_add_timer(timer); 2868 } 2869 2870 static void sco_handler(uint8_t * packet, uint16_t size){ 2871 // lookup connection struct 2872 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2873 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2874 if (!conn) return; 2875 2876 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2877 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2878 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2879 packet[2] = 0x3c; 2880 memmove(&packet[3], &packet[23], 63); 2881 size = 63; 2882 } 2883 } 2884 2885 if (hci_have_usb_transport()){ 2886 // Nothing to do 2887 } else { 2888 // 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); 2889 if (hci_stack->synchronous_flow_control_enabled == 0){ 2890 uint32_t now = btstack_run_loop_get_time_ms(); 2891 2892 if (!conn->sco_rx_valid){ 2893 // ignore first 10 packets 2894 conn->sco_rx_count++; 2895 // log_debug("sco rx count %u", conn->sco_rx_count); 2896 if (conn->sco_rx_count == 10) { 2897 // use first timestamp as is and pretent it just started 2898 conn->sco_rx_ms = now; 2899 conn->sco_rx_valid = 1; 2900 conn->sco_rx_count = 0; 2901 sco_schedule_tx(conn); 2902 } 2903 } else { 2904 // track expected arrival timme 2905 conn->sco_rx_count++; 2906 conn->sco_rx_ms += 7; 2907 int delta = (int32_t) (now - conn->sco_rx_ms); 2908 if (delta > 0){ 2909 conn->sco_rx_ms++; 2910 } 2911 // log_debug("sco rx %u", conn->sco_rx_ms); 2912 sco_schedule_tx(conn); 2913 } 2914 } 2915 } 2916 // deliver to app 2917 if (hci_stack->sco_packet_handler) { 2918 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2919 } 2920 2921 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2922 conn->num_packets_completed++; 2923 hci_stack->host_completed_packets = 1; 2924 hci_run(); 2925 #endif 2926 } 2927 #endif 2928 2929 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2930 hci_dump_packet(packet_type, 1, packet, size); 2931 switch (packet_type) { 2932 case HCI_EVENT_PACKET: 2933 event_handler(packet, size); 2934 break; 2935 case HCI_ACL_DATA_PACKET: 2936 acl_handler(packet, size); 2937 break; 2938 #ifdef ENABLE_CLASSIC 2939 case HCI_SCO_DATA_PACKET: 2940 sco_handler(packet, size); 2941 break; 2942 #endif 2943 default: 2944 break; 2945 } 2946 } 2947 2948 /** 2949 * @brief Add event packet handler. 2950 */ 2951 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2952 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2953 } 2954 2955 2956 /** Register HCI packet handlers */ 2957 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2958 hci_stack->acl_packet_handler = handler; 2959 } 2960 2961 #ifdef ENABLE_CLASSIC 2962 /** 2963 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2964 */ 2965 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2966 hci_stack->sco_packet_handler = handler; 2967 } 2968 #endif 2969 2970 static void hci_state_reset(void){ 2971 // no connections yet 2972 hci_stack->connections = NULL; 2973 2974 // keep discoverable/connectable as this has been requested by the client(s) 2975 // hci_stack->discoverable = 0; 2976 // hci_stack->connectable = 0; 2977 // hci_stack->bondable = 1; 2978 // hci_stack->own_addr_type = 0; 2979 2980 // buffer is free 2981 hci_stack->hci_packet_buffer_reserved = 0; 2982 2983 // no pending cmds 2984 hci_stack->decline_reason = 0; 2985 hci_stack->new_scan_enable_value = 0xff; 2986 2987 // LE 2988 #ifdef ENABLE_BLE 2989 memset(hci_stack->le_random_address, 0, 6); 2990 hci_stack->le_random_address_set = 0; 2991 #endif 2992 #ifdef ENABLE_LE_CENTRAL 2993 hci_stack->le_scanning_active = 0; 2994 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2995 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2996 hci_stack->le_whitelist_capacity = 0; 2997 #endif 2998 } 2999 3000 #ifdef ENABLE_CLASSIC 3001 /** 3002 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3003 */ 3004 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3005 // store and open remote device db 3006 hci_stack->link_key_db = link_key_db; 3007 if (hci_stack->link_key_db) { 3008 hci_stack->link_key_db->open(); 3009 } 3010 } 3011 #endif 3012 3013 void hci_init(const hci_transport_t *transport, const void *config){ 3014 3015 #ifdef HAVE_MALLOC 3016 if (!hci_stack) { 3017 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3018 } 3019 #else 3020 hci_stack = &hci_stack_static; 3021 #endif 3022 memset(hci_stack, 0, sizeof(hci_stack_t)); 3023 3024 // reference to use transport layer implementation 3025 hci_stack->hci_transport = transport; 3026 3027 // reference to used config 3028 hci_stack->config = config; 3029 3030 // setup pointer for outgoing packet buffer 3031 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3032 3033 // max acl payload size defined in config.h 3034 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3035 3036 // register packet handlers with transport 3037 transport->register_packet_handler(&packet_handler); 3038 3039 hci_stack->state = HCI_STATE_OFF; 3040 3041 // class of device 3042 hci_stack->class_of_device = 0x007a020c; // Smartphone 3043 3044 // bondable by default 3045 hci_stack->bondable = 1; 3046 3047 #ifdef ENABLE_CLASSIC 3048 // classic name 3049 hci_stack->local_name = default_classic_name; 3050 3051 // Master slave policy 3052 hci_stack->master_slave_policy = 1; 3053 3054 // Allow Role Switch 3055 hci_stack->allow_role_switch = 1; 3056 3057 // Default / minimum security level = 2 3058 hci_stack->gap_security_level = LEVEL_2; 3059 3060 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3061 hci_stack->gap_required_encyrption_key_size = 7; 3062 #endif 3063 3064 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3065 hci_stack->ssp_enable = 1; 3066 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3067 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3068 hci_stack->ssp_auto_accept = 1; 3069 3070 // Secure Connections: enable (requires support from Controller) 3071 hci_stack->secure_connections_enable = true; 3072 3073 // voice setting - signed 16 bit pcm data with CVSD over the air 3074 hci_stack->sco_voice_setting = 0x60; 3075 3076 #ifdef ENABLE_LE_CENTRAL 3077 // connection parameter to use for outgoing connections 3078 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3079 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3080 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3081 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3082 hci_stack->le_connection_latency = 4; // 4 3083 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3084 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3085 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3086 3087 // default LE Scanning 3088 hci_stack->le_scan_type = 0x1; // active 3089 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3090 hci_stack->le_scan_window = 0x30; // 30 ms 3091 #endif 3092 3093 #ifdef ENABLE_LE_PERIPHERAL 3094 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3095 #endif 3096 3097 // connection parameter range used to answer connection parameter update requests in l2cap 3098 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3099 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3100 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3101 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3102 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3103 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3104 3105 hci_state_reset(); 3106 } 3107 3108 /** 3109 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3110 */ 3111 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3112 hci_stack->chipset = chipset_driver; 3113 3114 // reset chipset driver - init is also called on power_up 3115 if (hci_stack->chipset && hci_stack->chipset->init){ 3116 hci_stack->chipset->init(hci_stack->config); 3117 } 3118 } 3119 3120 /** 3121 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3122 */ 3123 void hci_set_control(const btstack_control_t *hardware_control){ 3124 // references to used control implementation 3125 hci_stack->control = hardware_control; 3126 // init with transport config 3127 hardware_control->init(hci_stack->config); 3128 } 3129 3130 void hci_close(void){ 3131 // close remote device db 3132 if (hci_stack->link_key_db) { 3133 hci_stack->link_key_db->close(); 3134 } 3135 3136 btstack_linked_list_iterator_t lit; 3137 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3138 while (btstack_linked_list_iterator_has_next(&lit)){ 3139 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3140 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3141 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3142 hci_shutdown_connection(connection); 3143 } 3144 3145 hci_power_control(HCI_POWER_OFF); 3146 3147 #ifdef HAVE_MALLOC 3148 free(hci_stack); 3149 #endif 3150 hci_stack = NULL; 3151 } 3152 3153 #ifdef ENABLE_CLASSIC 3154 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3155 // validate ranage and set 3156 if (encryption_key_size < 7) return; 3157 if (encryption_key_size > 16) return; 3158 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3159 } 3160 3161 void gap_set_security_level(gap_security_level_t security_level){ 3162 hci_stack->gap_security_level = security_level; 3163 } 3164 3165 gap_security_level_t gap_get_security_level(void){ 3166 return hci_stack->gap_security_level; 3167 } 3168 #endif 3169 3170 #ifdef ENABLE_CLASSIC 3171 void gap_set_class_of_device(uint32_t class_of_device){ 3172 hci_stack->class_of_device = class_of_device; 3173 } 3174 3175 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3176 hci_stack->default_link_policy_settings = default_link_policy_settings; 3177 } 3178 3179 void gap_set_allow_role_switch(bool allow_role_switch){ 3180 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3181 } 3182 3183 uint8_t hci_get_allow_role_switch(void){ 3184 return hci_stack->allow_role_switch; 3185 } 3186 3187 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3188 hci_stack->link_supervision_timeout = link_supervision_timeout; 3189 } 3190 3191 void hci_disable_l2cap_timeout_check(void){ 3192 disable_l2cap_timeouts = 1; 3193 } 3194 #endif 3195 3196 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3197 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3198 void hci_set_bd_addr(bd_addr_t addr){ 3199 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3200 hci_stack->custom_bd_addr_set = 1; 3201 } 3202 #endif 3203 3204 // State-Module-Driver overview 3205 // state module low-level 3206 // HCI_STATE_OFF off close 3207 // HCI_STATE_INITIALIZING, on open 3208 // HCI_STATE_WORKING, on open 3209 // HCI_STATE_HALTING, on open 3210 // HCI_STATE_SLEEPING, off/sleep close 3211 // HCI_STATE_FALLING_ASLEEP on open 3212 3213 static int hci_power_control_on(void){ 3214 3215 // power on 3216 int err = 0; 3217 if (hci_stack->control && hci_stack->control->on){ 3218 err = (*hci_stack->control->on)(); 3219 } 3220 if (err){ 3221 log_error( "POWER_ON failed"); 3222 hci_emit_hci_open_failed(); 3223 return err; 3224 } 3225 3226 // int chipset driver 3227 if (hci_stack->chipset && hci_stack->chipset->init){ 3228 hci_stack->chipset->init(hci_stack->config); 3229 } 3230 3231 // init transport 3232 if (hci_stack->hci_transport->init){ 3233 hci_stack->hci_transport->init(hci_stack->config); 3234 } 3235 3236 // open transport 3237 err = hci_stack->hci_transport->open(); 3238 if (err){ 3239 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3240 if (hci_stack->control && hci_stack->control->off){ 3241 (*hci_stack->control->off)(); 3242 } 3243 hci_emit_hci_open_failed(); 3244 return err; 3245 } 3246 return 0; 3247 } 3248 3249 static void hci_power_control_off(void){ 3250 3251 log_info("hci_power_control_off"); 3252 3253 // close low-level device 3254 hci_stack->hci_transport->close(); 3255 3256 log_info("hci_power_control_off - hci_transport closed"); 3257 3258 // power off 3259 if (hci_stack->control && hci_stack->control->off){ 3260 (*hci_stack->control->off)(); 3261 } 3262 3263 log_info("hci_power_control_off - control closed"); 3264 3265 hci_stack->state = HCI_STATE_OFF; 3266 } 3267 3268 static void hci_power_control_sleep(void){ 3269 3270 log_info("hci_power_control_sleep"); 3271 3272 #if 0 3273 // don't close serial port during sleep 3274 3275 // close low-level device 3276 hci_stack->hci_transport->close(hci_stack->config); 3277 #endif 3278 3279 // sleep mode 3280 if (hci_stack->control && hci_stack->control->sleep){ 3281 (*hci_stack->control->sleep)(); 3282 } 3283 3284 hci_stack->state = HCI_STATE_SLEEPING; 3285 } 3286 3287 static int hci_power_control_wake(void){ 3288 3289 log_info("hci_power_control_wake"); 3290 3291 // wake on 3292 if (hci_stack->control && hci_stack->control->wake){ 3293 (*hci_stack->control->wake)(); 3294 } 3295 3296 #if 0 3297 // open low-level device 3298 int err = hci_stack->hci_transport->open(hci_stack->config); 3299 if (err){ 3300 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3301 if (hci_stack->control && hci_stack->control->off){ 3302 (*hci_stack->control->off)(); 3303 } 3304 hci_emit_hci_open_failed(); 3305 return err; 3306 } 3307 #endif 3308 3309 return 0; 3310 } 3311 3312 static void hci_power_transition_to_initializing(void){ 3313 // set up state machine 3314 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3315 hci_stack->hci_packet_buffer_reserved = 0; 3316 hci_stack->state = HCI_STATE_INITIALIZING; 3317 hci_stack->substate = HCI_INIT_SEND_RESET; 3318 } 3319 3320 int hci_power_control(HCI_POWER_MODE power_mode){ 3321 3322 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3323 3324 int err = 0; 3325 switch (hci_stack->state){ 3326 3327 case HCI_STATE_OFF: 3328 switch (power_mode){ 3329 case HCI_POWER_ON: 3330 err = hci_power_control_on(); 3331 if (err) { 3332 log_error("hci_power_control_on() error %d", err); 3333 return err; 3334 } 3335 hci_power_transition_to_initializing(); 3336 break; 3337 case HCI_POWER_OFF: 3338 // do nothing 3339 break; 3340 case HCI_POWER_SLEEP: 3341 // do nothing (with SLEEP == OFF) 3342 break; 3343 } 3344 break; 3345 3346 case HCI_STATE_INITIALIZING: 3347 switch (power_mode){ 3348 case HCI_POWER_ON: 3349 // do nothing 3350 break; 3351 case HCI_POWER_OFF: 3352 // no connections yet, just turn it off 3353 hci_power_control_off(); 3354 break; 3355 case HCI_POWER_SLEEP: 3356 // no connections yet, just turn it off 3357 hci_power_control_sleep(); 3358 break; 3359 } 3360 break; 3361 3362 case HCI_STATE_WORKING: 3363 switch (power_mode){ 3364 case HCI_POWER_ON: 3365 // do nothing 3366 break; 3367 case HCI_POWER_OFF: 3368 // see hci_run 3369 hci_stack->state = HCI_STATE_HALTING; 3370 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3371 break; 3372 case HCI_POWER_SLEEP: 3373 // see hci_run 3374 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3375 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3376 break; 3377 } 3378 break; 3379 3380 case HCI_STATE_HALTING: 3381 switch (power_mode){ 3382 case HCI_POWER_ON: 3383 hci_power_transition_to_initializing(); 3384 break; 3385 case HCI_POWER_OFF: 3386 // do nothing 3387 break; 3388 case HCI_POWER_SLEEP: 3389 // see hci_run 3390 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3391 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3392 break; 3393 } 3394 break; 3395 3396 case HCI_STATE_FALLING_ASLEEP: 3397 switch (power_mode){ 3398 case HCI_POWER_ON: 3399 3400 #ifdef HAVE_PLATFORM_IPHONE_OS 3401 // nothing to do, if H4 supports power management 3402 if (btstack_control_iphone_power_management_enabled()){ 3403 hci_stack->state = HCI_STATE_INITIALIZING; 3404 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3405 break; 3406 } 3407 #endif 3408 hci_power_transition_to_initializing(); 3409 break; 3410 case HCI_POWER_OFF: 3411 // see hci_run 3412 hci_stack->state = HCI_STATE_HALTING; 3413 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3414 break; 3415 case HCI_POWER_SLEEP: 3416 // do nothing 3417 break; 3418 } 3419 break; 3420 3421 case HCI_STATE_SLEEPING: 3422 switch (power_mode){ 3423 case HCI_POWER_ON: 3424 3425 #ifdef HAVE_PLATFORM_IPHONE_OS 3426 // nothing to do, if H4 supports power management 3427 if (btstack_control_iphone_power_management_enabled()){ 3428 hci_stack->state = HCI_STATE_INITIALIZING; 3429 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3430 hci_update_scan_enable(); 3431 break; 3432 } 3433 #endif 3434 err = hci_power_control_wake(); 3435 if (err) return err; 3436 hci_power_transition_to_initializing(); 3437 break; 3438 case HCI_POWER_OFF: 3439 hci_stack->state = HCI_STATE_HALTING; 3440 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3441 break; 3442 case HCI_POWER_SLEEP: 3443 // do nothing 3444 break; 3445 } 3446 break; 3447 } 3448 3449 // create internal event 3450 hci_emit_state(); 3451 3452 // trigger next/first action 3453 hci_run(); 3454 3455 return 0; 3456 } 3457 3458 3459 #ifdef ENABLE_CLASSIC 3460 3461 static void hci_update_scan_enable(void){ 3462 // 2 = page scan, 1 = inq scan 3463 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3464 hci_run(); 3465 } 3466 3467 void gap_discoverable_control(uint8_t enable){ 3468 if (enable) enable = 1; // normalize argument 3469 3470 if (hci_stack->discoverable == enable){ 3471 hci_emit_discoverable_enabled(hci_stack->discoverable); 3472 return; 3473 } 3474 3475 hci_stack->discoverable = enable; 3476 hci_update_scan_enable(); 3477 } 3478 3479 void gap_connectable_control(uint8_t enable){ 3480 if (enable) enable = 1; // normalize argument 3481 3482 // don't emit event 3483 if (hci_stack->connectable == enable) return; 3484 3485 hci_stack->connectable = enable; 3486 hci_update_scan_enable(); 3487 } 3488 #endif 3489 3490 void gap_local_bd_addr(bd_addr_t address_buffer){ 3491 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3492 } 3493 3494 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3495 static void hci_host_num_completed_packets(void){ 3496 3497 // create packet manually as arrays are not supported and num_commands should not get reduced 3498 hci_reserve_packet_buffer(); 3499 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3500 3501 uint16_t size = 0; 3502 uint16_t num_handles = 0; 3503 packet[size++] = 0x35; 3504 packet[size++] = 0x0c; 3505 size++; // skip param len 3506 size++; // skip num handles 3507 3508 // add { handle, packets } entries 3509 btstack_linked_item_t * it; 3510 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3511 hci_connection_t * connection = (hci_connection_t *) it; 3512 if (connection->num_packets_completed){ 3513 little_endian_store_16(packet, size, connection->con_handle); 3514 size += 2; 3515 little_endian_store_16(packet, size, connection->num_packets_completed); 3516 size += 2; 3517 // 3518 num_handles++; 3519 connection->num_packets_completed = 0; 3520 } 3521 } 3522 3523 packet[2] = size - 3; 3524 packet[3] = num_handles; 3525 3526 hci_stack->host_completed_packets = 0; 3527 3528 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3529 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3530 3531 // release packet buffer for synchronous transport implementations 3532 if (hci_transport_synchronous()){ 3533 hci_release_packet_buffer(); 3534 hci_emit_transport_packet_sent(); 3535 } 3536 } 3537 #endif 3538 3539 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3540 UNUSED(ds); 3541 hci_stack->substate = HCI_HALTING_CLOSE; 3542 // allow packet handlers to defer final shutdown 3543 hci_emit_state(); 3544 hci_run(); 3545 } 3546 3547 static bool hci_run_acl_fragments(void){ 3548 if (hci_stack->acl_fragmentation_total_size > 0u) { 3549 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3550 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3551 if (connection) { 3552 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3553 hci_send_acl_packet_fragments(connection); 3554 return true; 3555 } 3556 } else { 3557 // connection gone -> discard further fragments 3558 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3559 hci_stack->acl_fragmentation_total_size = 0; 3560 hci_stack->acl_fragmentation_pos = 0; 3561 } 3562 } 3563 return false; 3564 } 3565 3566 #ifdef ENABLE_CLASSIC 3567 static bool hci_run_general_gap_classic(void){ 3568 3569 // decline incoming connections 3570 if (hci_stack->decline_reason){ 3571 uint8_t reason = hci_stack->decline_reason; 3572 hci_stack->decline_reason = 0; 3573 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3574 return true; 3575 } 3576 // send scan enable 3577 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3578 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3579 hci_stack->new_scan_enable_value = 0xff; 3580 return true; 3581 } 3582 // start/stop inquiry 3583 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3584 uint8_t duration = hci_stack->inquiry_state; 3585 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3586 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3587 return true; 3588 } 3589 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3590 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3591 hci_send_cmd(&hci_inquiry_cancel); 3592 return true; 3593 } 3594 // remote name request 3595 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3596 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3597 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3598 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3599 return true; 3600 } 3601 // pairing 3602 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3603 uint8_t state = hci_stack->gap_pairing_state; 3604 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3605 switch (state){ 3606 case GAP_PAIRING_STATE_SEND_PIN: 3607 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); 3608 break; 3609 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3610 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3611 break; 3612 case GAP_PAIRING_STATE_SEND_PASSKEY: 3613 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3614 break; 3615 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3616 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3617 break; 3618 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3619 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3620 break; 3621 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3622 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3623 break; 3624 default: 3625 break; 3626 } 3627 return true; 3628 } 3629 return false; 3630 } 3631 #endif 3632 3633 #ifdef ENABLE_BLE 3634 static bool hci_run_general_gap_le(void){ 3635 3636 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3637 3638 if (hci_stack->state != HCI_STATE_WORKING) return false; 3639 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3640 3641 3642 // Phase 1: collect what to stop 3643 3644 bool scanning_stop = false; 3645 bool connecting_stop = false; 3646 bool advertising_stop = false; 3647 3648 #ifndef ENABLE_LE_CENTRAL 3649 UNUSED(scanning_stop); 3650 UNUSED(connecting_stop); 3651 #endif 3652 #ifndef ENABLE_LE_PERIPHERAL 3653 UNUSED(advertising_stop); 3654 #endif 3655 3656 // check if whitelist needs modification 3657 bool whitelist_modification_pending = false; 3658 btstack_linked_list_iterator_t lit; 3659 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3660 while (btstack_linked_list_iterator_has_next(&lit)){ 3661 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3662 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3663 whitelist_modification_pending = true; 3664 break; 3665 } 3666 } 3667 // check if resolving list needs modification 3668 bool resolving_list_modification_pending = false; 3669 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3670 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3671 resolving_list_modification_pending = true; 3672 } 3673 #endif 3674 3675 #ifdef ENABLE_LE_CENTRAL 3676 // scanning control 3677 if (hci_stack->le_scanning_active) { 3678 // stop if: 3679 // - parameter change required 3680 // - it's disabled 3681 // - whitelist change required but used for scanning 3682 // - resolving list modified 3683 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3684 if ((hci_stack->le_scanning_param_update) || 3685 !hci_stack->le_scanning_enabled || 3686 scanning_uses_whitelist || 3687 resolving_list_modification_pending){ 3688 3689 scanning_stop = true; 3690 } 3691 } 3692 #endif 3693 3694 #ifdef ENABLE_LE_CENTRAL 3695 // connecting control 3696 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3697 // stop connecting if: 3698 // - connecting uses white and whitelist modification pending 3699 // - if it got disabled 3700 // - resolving list modified 3701 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3702 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3703 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3704 resolving_list_modification_pending) { 3705 3706 connecting_stop = true; 3707 } 3708 } 3709 #endif 3710 3711 #ifdef ENABLE_LE_PERIPHERAL 3712 // le advertisement control 3713 if (hci_stack->le_advertisements_active){ 3714 // stop if: 3715 // - parameter change required 3716 // - it's disabled 3717 // - whitelist change required but used for advertisement filter policy 3718 // - resolving list modified 3719 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3720 if ((hci_stack->le_advertisements_todo != 0) || 3721 !hci_stack->le_advertisements_enabled_for_current_roles || 3722 (advertising_uses_whitelist & whitelist_modification_pending) || 3723 resolving_list_modification_pending) { 3724 3725 advertising_stop = true; 3726 } 3727 } 3728 #endif 3729 3730 3731 // Phase 2: stop everything that should be off during modifications 3732 3733 #ifdef ENABLE_LE_CENTRAL 3734 if (scanning_stop){ 3735 hci_stack->le_scanning_active = false; 3736 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3737 return true; 3738 } 3739 #endif 3740 3741 #ifdef ENABLE_LE_CENTRAL 3742 if (connecting_stop){ 3743 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3744 hci_send_cmd(&hci_le_create_connection_cancel); 3745 return true; 3746 } 3747 } 3748 #endif 3749 3750 #ifdef ENABLE_LE_PERIPHERAL 3751 if (advertising_stop){ 3752 hci_stack->le_advertisements_active = false; 3753 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3754 return true; 3755 } 3756 #endif 3757 3758 // Phase 3: modify 3759 3760 #ifdef ENABLE_LE_CENTRAL 3761 if (hci_stack->le_scanning_param_update){ 3762 hci_stack->le_scanning_param_update = false; 3763 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3764 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3765 return true; 3766 } 3767 #endif 3768 3769 #ifdef ENABLE_LE_PERIPHERAL 3770 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3771 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3772 hci_send_cmd(&hci_le_set_advertising_parameters, 3773 hci_stack->le_advertisements_interval_min, 3774 hci_stack->le_advertisements_interval_max, 3775 hci_stack->le_advertisements_type, 3776 hci_stack->le_own_addr_type, 3777 hci_stack->le_advertisements_direct_address_type, 3778 hci_stack->le_advertisements_direct_address, 3779 hci_stack->le_advertisements_channel_map, 3780 hci_stack->le_advertisements_filter_policy); 3781 return true; 3782 } 3783 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3784 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3785 uint8_t adv_data_clean[31]; 3786 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3787 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3788 hci_stack->le_advertisements_data_len); 3789 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3790 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3791 return true; 3792 } 3793 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3794 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3795 uint8_t scan_data_clean[31]; 3796 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3797 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3798 hci_stack->le_scan_response_data_len); 3799 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3800 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3801 return true; 3802 } 3803 #endif 3804 3805 3806 #ifdef ENABLE_LE_CENTRAL 3807 // if connect with whitelist was active and is not cancelled yet, wait until next time 3808 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3809 #endif 3810 3811 // LE Whitelist Management 3812 if (whitelist_modification_pending){ 3813 // add/remove entries 3814 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3815 while (btstack_linked_list_iterator_has_next(&lit)){ 3816 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3817 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3818 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3819 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3820 return true; 3821 } 3822 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3823 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3824 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3825 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3826 return true; 3827 } 3828 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3829 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3830 btstack_memory_whitelist_entry_free(entry); 3831 } 3832 } 3833 } 3834 3835 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3836 // LE Resolving List Management 3837 uint16_t i; 3838 switch (hci_stack->le_resolving_list_state){ 3839 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3840 // check if supported 3841 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0){ 3842 log_info("LE Address Resolution not supported"); 3843 break; 3844 } else { 3845 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3846 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3847 return true; 3848 } 3849 break; 3850 case LE_RESOLVING_LIST_READ_SIZE: 3851 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3852 hci_send_cmd(&hci_le_read_resolving_list_size); 3853 return true; 3854 case LE_RESOLVING_LIST_SEND_CLEAR: 3855 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3856 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, sizeof(hci_stack->le_resolving_list_add_entries)); 3857 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, sizeof(hci_stack->le_resolving_list_remove_entries)); 3858 hci_send_cmd(&hci_le_clear_resolving_list); 3859 return true; 3860 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3861 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3862 uint8_t offset = i >> 3; 3863 uint8_t mask = 1 << (i & 7); 3864 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3865 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3866 bd_addr_t peer_identity_addreses; 3867 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3868 sm_key_t peer_irk; 3869 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3870 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3871 3872 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3873 // trigger whitelist entry 'update' (work around for controller bug) 3874 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3875 while (btstack_linked_list_iterator_has_next(&lit)) { 3876 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3877 if (entry->address_type != peer_identity_addr_type) continue; 3878 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3879 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3880 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3881 } 3882 #endif 3883 3884 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, peer_identity_addreses); 3885 return true; 3886 } 3887 3888 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3889 3890 /* fall through */ 3891 3892 case LE_RESOLVING_LIST_ADD_ENTRIES: 3893 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3894 uint8_t offset = i >> 3; 3895 uint8_t mask = 1 << (i & 7); 3896 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3897 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3898 bd_addr_t peer_identity_addreses; 3899 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3900 sm_key_t peer_irk; 3901 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3902 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3903 const uint8_t * local_irk = gap_get_persistent_irk(); 3904 // command uses format specifier 'P' that stores 16-byte value without flip 3905 uint8_t local_irk_flipped[16]; 3906 uint8_t peer_irk_flipped[16]; 3907 reverse_128(local_irk, local_irk_flipped); 3908 reverse_128(peer_irk, peer_irk_flipped); 3909 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, peer_irk_flipped, local_irk_flipped); 3910 return true; 3911 } 3912 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3913 break; 3914 3915 default: 3916 break; 3917 } 3918 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3919 #endif 3920 3921 // Phase 4: restore state 3922 3923 #ifdef ENABLE_LE_CENTRAL 3924 // re-start scanning 3925 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3926 hci_stack->le_scanning_active = true; 3927 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3928 return true; 3929 } 3930 #endif 3931 3932 #ifdef ENABLE_LE_CENTRAL 3933 // re-start connecting 3934 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3935 bd_addr_t null_addr; 3936 memset(null_addr, 0, 6); 3937 hci_send_cmd(&hci_le_create_connection, 3938 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3939 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3940 1, // use whitelist 3941 0, // peer address type 3942 null_addr, // peer bd addr 3943 hci_stack->le_own_addr_type, // our addr type: 3944 hci_stack->le_connection_interval_min, // conn interval min 3945 hci_stack->le_connection_interval_max, // conn interval max 3946 hci_stack->le_connection_latency, // conn latency 3947 hci_stack->le_supervision_timeout, // conn latency 3948 hci_stack->le_minimum_ce_length, // min ce length 3949 hci_stack->le_maximum_ce_length // max ce length 3950 ); 3951 return true; 3952 } 3953 #endif 3954 3955 #ifdef ENABLE_LE_PERIPHERAL 3956 // re-start advertising 3957 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 3958 // check if advertisements should be enabled given 3959 hci_stack->le_advertisements_active = true; 3960 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3961 return true; 3962 } 3963 #endif 3964 3965 return false; 3966 } 3967 #endif 3968 3969 static bool hci_run_general_pending_commands(void){ 3970 btstack_linked_item_t * it; 3971 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3972 hci_connection_t * connection = (hci_connection_t *) it; 3973 3974 switch(connection->state){ 3975 case SEND_CREATE_CONNECTION: 3976 switch(connection->address_type){ 3977 #ifdef ENABLE_CLASSIC 3978 case BD_ADDR_TYPE_ACL: 3979 log_info("sending hci_create_connection"); 3980 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3981 break; 3982 #endif 3983 default: 3984 #ifdef ENABLE_BLE 3985 #ifdef ENABLE_LE_CENTRAL 3986 log_info("sending hci_le_create_connection"); 3987 hci_send_cmd(&hci_le_create_connection, 3988 hci_stack->le_connection_scan_interval, // conn scan interval 3989 hci_stack->le_connection_scan_window, // conn scan windows 3990 0, // don't use whitelist 3991 connection->address_type, // peer address type 3992 connection->address, // peer bd addr 3993 hci_stack->le_own_addr_type, // our addr type: 3994 hci_stack->le_connection_interval_min, // conn interval min 3995 hci_stack->le_connection_interval_max, // conn interval max 3996 hci_stack->le_connection_latency, // conn latency 3997 hci_stack->le_supervision_timeout, // conn latency 3998 hci_stack->le_minimum_ce_length, // min ce length 3999 hci_stack->le_maximum_ce_length // max ce length 4000 ); 4001 connection->state = SENT_CREATE_CONNECTION; 4002 #endif 4003 #endif 4004 break; 4005 } 4006 return true; 4007 4008 #ifdef ENABLE_CLASSIC 4009 case RECEIVED_CONNECTION_REQUEST: 4010 connection->role = HCI_ROLE_SLAVE; 4011 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4012 log_info("sending hci_accept_connection_request"); 4013 connection->state = ACCEPTED_CONNECTION_REQUEST; 4014 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4015 } 4016 return true; 4017 #endif 4018 4019 #ifdef ENABLE_BLE 4020 #ifdef ENABLE_LE_CENTRAL 4021 case SEND_CANCEL_CONNECTION: 4022 connection->state = SENT_CANCEL_CONNECTION; 4023 hci_send_cmd(&hci_le_create_connection_cancel); 4024 return true; 4025 #endif 4026 #endif 4027 case SEND_DISCONNECT: 4028 connection->state = SENT_DISCONNECT; 4029 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4030 return true; 4031 4032 default: 4033 break; 4034 } 4035 4036 // no further commands if connection is about to get shut down 4037 if (connection->state == SENT_DISCONNECT) continue; 4038 4039 if (connection->authentication_flags & READ_RSSI){ 4040 connectionClearAuthenticationFlags(connection, READ_RSSI); 4041 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4042 return true; 4043 } 4044 4045 #ifdef ENABLE_CLASSIC 4046 4047 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4048 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4049 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4050 return true; 4051 } 4052 4053 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4054 log_info("responding to link key request"); 4055 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4056 4057 link_key_t link_key; 4058 link_key_type_t link_key_type; 4059 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4060 4061 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4062 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4063 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4064 if (sc_downgrade){ 4065 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4066 connection->state = SENT_DISCONNECT; 4067 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4068 return true; 4069 } 4070 4071 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4072 if (have_link_key && security_level_sufficient){ 4073 connection->link_key_type = link_key_type; 4074 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4075 } else { 4076 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4077 } 4078 return true; 4079 } 4080 4081 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4082 log_info("denying to pin request"); 4083 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4084 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4085 return true; 4086 } 4087 4088 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4089 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4090 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4091 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4092 // tweak authentication requirements 4093 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4094 if (connection->bonding_flags & BONDING_DEDICATED){ 4095 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4096 } 4097 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4098 authreq |= 1; 4099 } 4100 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4101 } else { 4102 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4103 } 4104 return true; 4105 } 4106 4107 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4108 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4109 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4110 return true; 4111 } 4112 4113 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4114 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4115 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4116 return true; 4117 } 4118 4119 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4120 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4121 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4122 return true; 4123 } 4124 4125 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4126 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4127 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4128 return true; 4129 } 4130 4131 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4132 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4133 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4134 return true; 4135 } 4136 4137 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4138 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4139 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4140 connection->state = SENT_DISCONNECT; 4141 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4142 return true; 4143 } 4144 4145 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4146 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4147 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4148 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4149 return true; 4150 } 4151 4152 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4153 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4154 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4155 return true; 4156 } 4157 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4158 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4159 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4160 return true; 4161 } 4162 #endif 4163 4164 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4165 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4166 if (connection->state != SENT_DISCONNECT){ 4167 connection->state = SENT_DISCONNECT; 4168 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4169 return true; 4170 } 4171 } 4172 4173 #ifdef ENABLE_CLASSIC 4174 uint16_t sniff_min_interval; 4175 switch (connection->sniff_min_interval){ 4176 case 0: 4177 break; 4178 case 0xffff: 4179 connection->sniff_min_interval = 0; 4180 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4181 return true; 4182 default: 4183 sniff_min_interval = connection->sniff_min_interval; 4184 connection->sniff_min_interval = 0; 4185 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4186 return true; 4187 } 4188 4189 if (connection->request_role != HCI_ROLE_INVALID){ 4190 hci_role_t role = connection->request_role; 4191 connection->request_role = HCI_ROLE_INVALID; 4192 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4193 return true; 4194 } 4195 #endif 4196 4197 #ifdef ENABLE_BLE 4198 switch (connection->le_con_parameter_update_state){ 4199 // response to L2CAP CON PARAMETER UPDATE REQUEST 4200 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4201 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4202 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4203 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4204 0x0000, 0xffff); 4205 return true; 4206 case CON_PARAMETER_UPDATE_REPLY: 4207 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4208 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4209 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4210 0x0000, 0xffff); 4211 return true; 4212 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4213 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4214 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4215 return true; 4216 default: 4217 break; 4218 } 4219 if (connection->le_phy_update_all_phys != 0xffu){ 4220 uint8_t all_phys = connection->le_phy_update_all_phys; 4221 connection->le_phy_update_all_phys = 0xff; 4222 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); 4223 return true; 4224 } 4225 #endif 4226 } 4227 return false; 4228 } 4229 4230 static void hci_run(void){ 4231 4232 bool done; 4233 4234 // send continuation fragments first, as they block the prepared packet buffer 4235 done = hci_run_acl_fragments(); 4236 if (done) return; 4237 4238 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4239 // send host num completed packets next as they don't require num_cmd_packets > 0 4240 if (!hci_can_send_comand_packet_transport()) return; 4241 if (hci_stack->host_completed_packets){ 4242 hci_host_num_completed_packets(); 4243 return; 4244 } 4245 #endif 4246 4247 if (!hci_can_send_command_packet_now()) return; 4248 4249 // global/non-connection oriented commands 4250 4251 4252 #ifdef ENABLE_CLASSIC 4253 // general gap classic 4254 done = hci_run_general_gap_classic(); 4255 if (done) return; 4256 #endif 4257 4258 #ifdef ENABLE_BLE 4259 // general gap le 4260 done = hci_run_general_gap_le(); 4261 if (done) return; 4262 #endif 4263 4264 // send pending HCI commands 4265 done = hci_run_general_pending_commands(); 4266 if (done) return; 4267 4268 // stack state sub statemachines 4269 hci_connection_t * connection; 4270 switch (hci_stack->state){ 4271 case HCI_STATE_INITIALIZING: 4272 hci_initializing_run(); 4273 break; 4274 4275 case HCI_STATE_HALTING: 4276 4277 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4278 switch (hci_stack->substate){ 4279 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4280 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4281 4282 #ifdef ENABLE_BLE 4283 #ifdef ENABLE_LE_CENTRAL 4284 // free whitelist entries 4285 { 4286 btstack_linked_list_iterator_t lit; 4287 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4288 while (btstack_linked_list_iterator_has_next(&lit)){ 4289 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4290 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4291 btstack_memory_whitelist_entry_free(entry); 4292 } 4293 } 4294 #endif 4295 #endif 4296 // close all open connections 4297 connection = (hci_connection_t *) hci_stack->connections; 4298 if (connection){ 4299 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4300 if (!hci_can_send_command_packet_now()) return; 4301 4302 // check state 4303 if (connection->state == SENT_DISCONNECT) return; 4304 connection->state = SENT_DISCONNECT; 4305 4306 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4307 4308 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4309 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4310 4311 // ... which would be ignored anyway as we shutdown (free) the connection now 4312 hci_shutdown_connection(connection); 4313 4314 // finally, send the disconnect command 4315 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4316 return; 4317 } 4318 4319 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4320 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4321 log_info("HCI_STATE_HALTING: wait 50 ms"); 4322 hci_stack->substate = HCI_HALTING_W4_TIMER; 4323 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4324 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4325 btstack_run_loop_add_timer(&hci_stack->timeout); 4326 break; 4327 } 4328 4329 /* fall through */ 4330 4331 case HCI_HALTING_CLOSE: 4332 log_info("HCI_STATE_HALTING, calling off"); 4333 4334 // switch mode 4335 hci_power_control_off(); 4336 4337 log_info("HCI_STATE_HALTING, emitting state"); 4338 hci_emit_state(); 4339 log_info("HCI_STATE_HALTING, done"); 4340 break; 4341 4342 case HCI_HALTING_W4_TIMER: 4343 // keep waiting 4344 4345 break; 4346 default: 4347 break; 4348 } 4349 4350 break; 4351 4352 case HCI_STATE_FALLING_ASLEEP: 4353 switch(hci_stack->substate) { 4354 case HCI_FALLING_ASLEEP_DISCONNECT: 4355 log_info("HCI_STATE_FALLING_ASLEEP"); 4356 // close all open connections 4357 connection = (hci_connection_t *) hci_stack->connections; 4358 4359 #ifdef HAVE_PLATFORM_IPHONE_OS 4360 // don't close connections, if H4 supports power management 4361 if (btstack_control_iphone_power_management_enabled()){ 4362 connection = NULL; 4363 } 4364 #endif 4365 if (connection){ 4366 4367 // send disconnect 4368 if (!hci_can_send_command_packet_now()) return; 4369 4370 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4371 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4372 4373 // send disconnected event right away - causes higher layer connections to get closed, too. 4374 hci_shutdown_connection(connection); 4375 return; 4376 } 4377 4378 if (hci_classic_supported()){ 4379 // disable page and inquiry scan 4380 if (!hci_can_send_command_packet_now()) return; 4381 4382 log_info("HCI_STATE_HALTING, disabling inq scans"); 4383 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4384 4385 // continue in next sub state 4386 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4387 break; 4388 } 4389 4390 /* fall through */ 4391 4392 case HCI_FALLING_ASLEEP_COMPLETE: 4393 log_info("HCI_STATE_HALTING, calling sleep"); 4394 #ifdef HAVE_PLATFORM_IPHONE_OS 4395 // don't actually go to sleep, if H4 supports power management 4396 if (btstack_control_iphone_power_management_enabled()){ 4397 // SLEEP MODE reached 4398 hci_stack->state = HCI_STATE_SLEEPING; 4399 hci_emit_state(); 4400 break; 4401 } 4402 #endif 4403 // switch mode 4404 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4405 hci_emit_state(); 4406 break; 4407 4408 default: 4409 break; 4410 } 4411 break; 4412 4413 default: 4414 break; 4415 } 4416 } 4417 4418 int hci_send_cmd_packet(uint8_t *packet, int size){ 4419 // house-keeping 4420 4421 #ifdef ENABLE_CLASSIC 4422 bd_addr_t addr; 4423 hci_connection_t * conn; 4424 #endif 4425 #ifdef ENABLE_LE_CENTRAL 4426 uint8_t initiator_filter_policy; 4427 #endif 4428 4429 uint16_t opcode = little_endian_read_16(packet, 0); 4430 switch (opcode) { 4431 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4432 hci_stack->loopback_mode = packet[3]; 4433 break; 4434 4435 #ifdef ENABLE_CLASSIC 4436 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4437 reverse_bd_addr(&packet[3], addr); 4438 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4439 4440 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4441 if (!conn) { 4442 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4443 if (!conn) { 4444 // notify client that alloc failed 4445 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4446 return -1; // packet not sent to controller 4447 } 4448 conn->state = SEND_CREATE_CONNECTION; 4449 conn->role = HCI_ROLE_MASTER; 4450 } 4451 log_info("conn state %u", conn->state); 4452 switch (conn->state) { 4453 // if connection active exists 4454 case OPEN: 4455 // and OPEN, emit connection complete command 4456 hci_emit_connection_complete(addr, conn->con_handle, 0); 4457 return -1; // packet not sent to controller 4458 case RECEIVED_DISCONNECTION_COMPLETE: 4459 // create connection triggered in disconnect complete event, let's do it now 4460 break; 4461 case SEND_CREATE_CONNECTION: 4462 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4463 break; 4464 default: 4465 // otherwise, just ignore as it is already in the open process 4466 return -1; // packet not sent to controller 4467 } 4468 conn->state = SENT_CREATE_CONNECTION; 4469 4470 // track outgoing connection 4471 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4472 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4473 break; 4474 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4475 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4476 break; 4477 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4478 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4479 break; 4480 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4481 if (hci_stack->link_key_db) { 4482 reverse_bd_addr(&packet[3], addr); 4483 hci_stack->link_key_db->delete_link_key(addr); 4484 } 4485 break; 4486 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4487 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4488 reverse_bd_addr(&packet[3], addr); 4489 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4490 if (conn) { 4491 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4492 } 4493 break; 4494 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4495 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4496 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4497 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4498 reverse_bd_addr(&packet[3], addr); 4499 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4500 if (conn) { 4501 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4502 } 4503 break; 4504 4505 #ifdef ENABLE_SCO_OVER_HCI 4506 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4507 // setup_synchronous_connection? Voice setting at offset 22 4508 // TODO: compare to current setting if sco connection already active 4509 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4510 break; 4511 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4512 // accept_synchronus_connection? Voice setting at offset 18 4513 // TODO: compare to current setting if sco connection already active 4514 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4515 break; 4516 #endif 4517 #endif 4518 4519 #ifdef ENABLE_BLE 4520 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4521 hci_stack->le_random_address_set = 1; 4522 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4523 break; 4524 #ifdef ENABLE_LE_PERIPHERAL 4525 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4526 hci_stack->le_advertisements_active = packet[3] != 0; 4527 break; 4528 #endif 4529 #ifdef ENABLE_LE_CENTRAL 4530 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4531 // white list used? 4532 initiator_filter_policy = packet[7]; 4533 switch (initiator_filter_policy) { 4534 case 0: 4535 // whitelist not used 4536 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4537 break; 4538 case 1: 4539 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4540 break; 4541 default: 4542 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4543 break; 4544 } 4545 // track outgoing connection 4546 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4547 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4548 break; 4549 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4550 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4551 break; 4552 #endif 4553 #endif 4554 default: 4555 break; 4556 } 4557 4558 hci_stack->num_cmd_packets--; 4559 4560 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4561 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4562 } 4563 4564 // disconnect because of security block 4565 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4566 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4567 if (!connection) return; 4568 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4569 } 4570 4571 4572 // Configure Secure Simple Pairing 4573 4574 #ifdef ENABLE_CLASSIC 4575 4576 // enable will enable SSP during init 4577 void gap_ssp_set_enable(int enable){ 4578 hci_stack->ssp_enable = enable; 4579 } 4580 4581 static int hci_local_ssp_activated(void){ 4582 return gap_ssp_supported() && hci_stack->ssp_enable; 4583 } 4584 4585 // if set, BTstack will respond to io capability request using authentication requirement 4586 void gap_ssp_set_io_capability(int io_capability){ 4587 hci_stack->ssp_io_capability = io_capability; 4588 } 4589 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4590 hci_stack->ssp_authentication_requirement = authentication_requirement; 4591 } 4592 4593 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4594 void gap_ssp_set_auto_accept(int auto_accept){ 4595 hci_stack->ssp_auto_accept = auto_accept; 4596 } 4597 4598 void gap_secure_connections_enable(bool enable){ 4599 hci_stack->secure_connections_enable = enable; 4600 } 4601 4602 #endif 4603 4604 // va_list part of hci_send_cmd 4605 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4606 if (!hci_can_send_command_packet_now()){ 4607 log_error("hci_send_cmd called but cannot send packet now"); 4608 return 0; 4609 } 4610 4611 // for HCI INITIALIZATION 4612 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4613 hci_stack->last_cmd_opcode = cmd->opcode; 4614 4615 hci_reserve_packet_buffer(); 4616 uint8_t * packet = hci_stack->hci_packet_buffer; 4617 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4618 int err = hci_send_cmd_packet(packet, size); 4619 4620 // release packet buffer on error or for synchronous transport implementations 4621 if ((err < 0) || hci_transport_synchronous()){ 4622 hci_release_packet_buffer(); 4623 hci_emit_transport_packet_sent(); 4624 } 4625 4626 return err; 4627 } 4628 4629 /** 4630 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4631 */ 4632 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4633 va_list argptr; 4634 va_start(argptr, cmd); 4635 int res = hci_send_cmd_va_arg(cmd, argptr); 4636 va_end(argptr); 4637 return res; 4638 } 4639 4640 // Create various non-HCI events. 4641 // TODO: generalize, use table similar to hci_create_command 4642 4643 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4644 // dump packet 4645 if (dump) { 4646 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4647 } 4648 4649 // dispatch to all event handlers 4650 btstack_linked_list_iterator_t it; 4651 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4652 while (btstack_linked_list_iterator_has_next(&it)){ 4653 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4654 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4655 } 4656 } 4657 4658 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4659 if (!hci_stack->acl_packet_handler) return; 4660 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4661 } 4662 4663 #ifdef ENABLE_CLASSIC 4664 static void hci_notify_if_sco_can_send_now(void){ 4665 // notify SCO sender if waiting 4666 if (!hci_stack->sco_waiting_for_can_send_now) return; 4667 if (hci_can_send_sco_packet_now()){ 4668 hci_stack->sco_waiting_for_can_send_now = 0; 4669 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4670 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4671 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4672 } 4673 } 4674 4675 // parsing end emitting has been merged to reduce code size 4676 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4677 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4678 4679 uint8_t * eir_data; 4680 ad_context_t context; 4681 const uint8_t * name; 4682 uint8_t name_len; 4683 4684 if (size < 3) return; 4685 4686 int event_type = hci_event_packet_get_type(packet); 4687 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4688 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4689 4690 switch (event_type){ 4691 case HCI_EVENT_INQUIRY_RESULT: 4692 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4693 if (size != (3 + (num_responses * 14))) return; 4694 break; 4695 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4696 if (size != 257) return; 4697 if (num_responses != 1) return; 4698 break; 4699 default: 4700 return; 4701 } 4702 4703 // event[1] is set at the end 4704 int i; 4705 for (i=0; i<num_responses;i++){ 4706 memset(event, 0, sizeof(event)); 4707 event[0] = GAP_EVENT_INQUIRY_RESULT; 4708 uint8_t event_size = 18; // if name is not set by EIR 4709 4710 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4711 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4712 (void)memcpy(&event[9], 4713 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4714 3); // class of device 4715 (void)memcpy(&event[12], 4716 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4717 2); // clock offset 4718 4719 switch (event_type){ 4720 case HCI_EVENT_INQUIRY_RESULT: 4721 // 14,15,16,17 = 0, size 18 4722 break; 4723 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4724 event[14] = 1; 4725 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4726 // 16,17 = 0, size 18 4727 break; 4728 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4729 event[14] = 1; 4730 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4731 // EIR packets only contain a single inquiry response 4732 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4733 name = NULL; 4734 // Iterate over EIR data 4735 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4736 uint8_t data_type = ad_iterator_get_data_type(&context); 4737 uint8_t data_size = ad_iterator_get_data_len(&context); 4738 const uint8_t * data = ad_iterator_get_data(&context); 4739 // Prefer Complete Local Name over Shortend Local Name 4740 switch (data_type){ 4741 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4742 if (name) continue; 4743 /* fall through */ 4744 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4745 name = data; 4746 name_len = data_size; 4747 break; 4748 default: 4749 break; 4750 } 4751 } 4752 if (name){ 4753 event[16] = 1; 4754 // truncate name if needed 4755 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4756 event[17] = len; 4757 (void)memcpy(&event[18], name, len); 4758 event_size += len; 4759 } 4760 break; 4761 } 4762 event[1] = event_size - 2; 4763 hci_emit_event(event, event_size, 1); 4764 } 4765 } 4766 #endif 4767 4768 void hci_emit_state(void){ 4769 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4770 uint8_t event[3]; 4771 event[0] = BTSTACK_EVENT_STATE; 4772 event[1] = sizeof(event) - 2u; 4773 event[2] = hci_stack->state; 4774 hci_emit_event(event, sizeof(event), 1); 4775 } 4776 4777 #ifdef ENABLE_CLASSIC 4778 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4779 uint8_t event[13]; 4780 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4781 event[1] = sizeof(event) - 2; 4782 event[2] = status; 4783 little_endian_store_16(event, 3, con_handle); 4784 reverse_bd_addr(address, &event[5]); 4785 event[11] = 1; // ACL connection 4786 event[12] = 0; // encryption disabled 4787 hci_emit_event(event, sizeof(event), 1); 4788 } 4789 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4790 if (disable_l2cap_timeouts) return; 4791 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4792 uint8_t event[4]; 4793 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4794 event[1] = sizeof(event) - 2; 4795 little_endian_store_16(event, 2, conn->con_handle); 4796 hci_emit_event(event, sizeof(event), 1); 4797 } 4798 #endif 4799 4800 #ifdef ENABLE_BLE 4801 #ifdef ENABLE_LE_CENTRAL 4802 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){ 4803 uint8_t event[21]; 4804 event[0] = HCI_EVENT_LE_META; 4805 event[1] = sizeof(event) - 2u; 4806 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4807 event[3] = status; 4808 little_endian_store_16(event, 4, con_handle); 4809 event[6] = 0; // TODO: role 4810 event[7] = address_type; 4811 reverse_bd_addr(address, &event[8]); 4812 little_endian_store_16(event, 14, 0); // interval 4813 little_endian_store_16(event, 16, 0); // latency 4814 little_endian_store_16(event, 18, 0); // supervision timeout 4815 event[20] = 0; // master clock accuracy 4816 hci_emit_event(event, sizeof(event), 1); 4817 } 4818 #endif 4819 #endif 4820 4821 static void hci_emit_transport_packet_sent(void){ 4822 // notify upper stack that it might be possible to send again 4823 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4824 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4825 } 4826 4827 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4828 uint8_t event[6]; 4829 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4830 event[1] = sizeof(event) - 2u; 4831 event[2] = 0; // status = OK 4832 little_endian_store_16(event, 3, con_handle); 4833 event[5] = reason; 4834 hci_emit_event(event, sizeof(event), 1); 4835 } 4836 4837 static void hci_emit_nr_connections_changed(void){ 4838 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4839 uint8_t event[3]; 4840 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4841 event[1] = sizeof(event) - 2u; 4842 event[2] = nr_hci_connections(); 4843 hci_emit_event(event, sizeof(event), 1); 4844 } 4845 4846 static void hci_emit_hci_open_failed(void){ 4847 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4848 uint8_t event[2]; 4849 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4850 event[1] = sizeof(event) - 2u; 4851 hci_emit_event(event, sizeof(event), 1); 4852 } 4853 4854 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4855 log_info("hci_emit_dedicated_bonding_result %u ", status); 4856 uint8_t event[9]; 4857 int pos = 0; 4858 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4859 event[pos++] = sizeof(event) - 2u; 4860 event[pos++] = status; 4861 reverse_bd_addr(address, &event[pos]); 4862 hci_emit_event(event, sizeof(event), 1); 4863 } 4864 4865 4866 #ifdef ENABLE_CLASSIC 4867 4868 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4869 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4870 uint8_t event[5]; 4871 int pos = 0; 4872 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4873 event[pos++] = sizeof(event) - 2; 4874 little_endian_store_16(event, 2, con_handle); 4875 pos += 2; 4876 event[pos++] = level; 4877 hci_emit_event(event, sizeof(event), 1); 4878 } 4879 4880 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4881 if (!connection) return LEVEL_0; 4882 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4883 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4884 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4885 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4886 // LEVEL 4 always requires 128 bit encrytion key size 4887 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4888 security_level = LEVEL_3; 4889 } 4890 return security_level; 4891 } 4892 4893 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4894 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4895 uint8_t event[3]; 4896 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4897 event[1] = sizeof(event) - 2; 4898 event[2] = enabled; 4899 hci_emit_event(event, sizeof(event), 1); 4900 } 4901 4902 // query if remote side supports eSCO 4903 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4904 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4905 if (!connection) return 0; 4906 return (connection->remote_supported_features[0] & 1) != 0; 4907 } 4908 4909 static bool hci_ssp_supported(hci_connection_t * connection){ 4910 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4911 return (connection->bonding_flags & mask) == mask; 4912 } 4913 4914 // query if remote side supports SSP 4915 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4916 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4917 if (!connection) return 0; 4918 return hci_ssp_supported(connection) ? 1 : 0; 4919 } 4920 4921 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4922 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4923 } 4924 4925 // GAP API 4926 /** 4927 * @bbrief enable/disable bonding. default is enabled 4928 * @praram enabled 4929 */ 4930 void gap_set_bondable_mode(int enable){ 4931 hci_stack->bondable = enable ? 1 : 0; 4932 } 4933 /** 4934 * @brief Get bondable mode. 4935 * @return 1 if bondable 4936 */ 4937 int gap_get_bondable_mode(void){ 4938 return hci_stack->bondable; 4939 } 4940 4941 /** 4942 * @brief map link keys to security levels 4943 */ 4944 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4945 switch (link_key_type){ 4946 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4947 return LEVEL_4; 4948 case COMBINATION_KEY: 4949 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4950 return LEVEL_3; 4951 default: 4952 return LEVEL_2; 4953 } 4954 } 4955 4956 /** 4957 * @brief map link keys to secure connection yes/no 4958 */ 4959 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4960 switch (link_key_type){ 4961 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4962 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4963 return 1; 4964 default: 4965 return 0; 4966 } 4967 } 4968 4969 /** 4970 * @brief map link keys to authenticated 4971 */ 4972 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4973 switch (link_key_type){ 4974 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4975 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4976 return 1; 4977 default: 4978 return 0; 4979 } 4980 } 4981 4982 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4983 log_info("gap_mitm_protection_required_for_security_level %u", level); 4984 return level > LEVEL_2; 4985 } 4986 4987 /** 4988 * @brief get current security level 4989 */ 4990 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4991 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4992 if (!connection) return LEVEL_0; 4993 return gap_security_level_for_connection(connection); 4994 } 4995 4996 /** 4997 * @brief request connection to device to 4998 * @result GAP_AUTHENTICATION_RESULT 4999 */ 5000 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5001 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5002 if (!connection){ 5003 hci_emit_security_level(con_handle, LEVEL_0); 5004 return; 5005 } 5006 gap_security_level_t current_level = gap_security_level(con_handle); 5007 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5008 requested_level, connection->requested_security_level, current_level); 5009 5010 // assumption: earlier requested security higher than current level => security request is active 5011 if (current_level < connection->requested_security_level){ 5012 if (connection->requested_security_level < requested_level){ 5013 // increase requested level as new level is higher 5014 5015 // TODO: handle re-authentication when done 5016 5017 connection->requested_security_level = requested_level; 5018 } 5019 return; 5020 } 5021 5022 // no request active, notify if security sufficient 5023 if (requested_level <= current_level){ 5024 hci_emit_security_level(con_handle, current_level); 5025 return; 5026 } 5027 5028 // start pairing to increase security level 5029 connection->requested_security_level = requested_level; 5030 5031 #if 0 5032 // sending encryption request without a link key results in an error. 5033 // TODO: figure out how to use it properly 5034 5035 // would enabling ecnryption suffice (>= LEVEL_2)? 5036 if (hci_stack->link_key_db){ 5037 link_key_type_t link_key_type; 5038 link_key_t link_key; 5039 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 5040 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 5041 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 5042 return; 5043 } 5044 } 5045 } 5046 #endif 5047 5048 // start to authenticate connection if not already active 5049 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5050 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5051 hci_run(); 5052 } 5053 5054 /** 5055 * @brief start dedicated bonding with device. disconnect after bonding 5056 * @param device 5057 * @param request MITM protection 5058 * @result GAP_DEDICATED_BONDING_COMPLETE 5059 */ 5060 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5061 5062 // create connection state machine 5063 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5064 5065 if (!connection){ 5066 return BTSTACK_MEMORY_ALLOC_FAILED; 5067 } 5068 5069 // delete linkn key 5070 gap_drop_link_key_for_bd_addr(device); 5071 5072 // configure LEVEL_2/3, dedicated bonding 5073 connection->state = SEND_CREATE_CONNECTION; 5074 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5075 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5076 connection->bonding_flags = BONDING_DEDICATED; 5077 5078 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5079 5080 // handle: connnection failure (connection complete != ok) 5081 // handle: authentication failure 5082 // handle: disconnect on done 5083 5084 hci_run(); 5085 5086 return 0; 5087 } 5088 #endif 5089 5090 void gap_set_local_name(const char * local_name){ 5091 hci_stack->local_name = local_name; 5092 } 5093 5094 5095 #ifdef ENABLE_BLE 5096 5097 #ifdef ENABLE_LE_CENTRAL 5098 void gap_start_scan(void){ 5099 hci_stack->le_scanning_enabled = true; 5100 hci_run(); 5101 } 5102 5103 void gap_stop_scan(void){ 5104 hci_stack->le_scanning_enabled = false; 5105 hci_run(); 5106 } 5107 5108 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5109 hci_stack->le_scan_type = scan_type; 5110 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5111 hci_stack->le_scan_interval = scan_interval; 5112 hci_stack->le_scan_window = scan_window; 5113 hci_stack->le_scanning_param_update = true; 5114 hci_run(); 5115 } 5116 5117 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5118 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5119 } 5120 5121 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5122 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5123 if (!conn){ 5124 // disallow if le connection is already outgoing 5125 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5126 log_error("le connection already active"); 5127 return ERROR_CODE_COMMAND_DISALLOWED; 5128 } 5129 5130 log_info("gap_connect: no connection exists yet, creating context"); 5131 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5132 if (!conn){ 5133 // notify client that alloc failed 5134 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5135 log_info("gap_connect: failed to alloc hci_connection_t"); 5136 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5137 } 5138 5139 // set le connecting state 5140 if (hci_is_le_connection_type(addr_type)){ 5141 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5142 } 5143 5144 conn->state = SEND_CREATE_CONNECTION; 5145 log_info("gap_connect: send create connection next"); 5146 hci_run(); 5147 return ERROR_CODE_SUCCESS; 5148 } 5149 5150 if (!hci_is_le_connection(conn) || 5151 (conn->state == SEND_CREATE_CONNECTION) || 5152 (conn->state == SENT_CREATE_CONNECTION)) { 5153 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5154 log_error("gap_connect: classic connection or connect is already being created"); 5155 return GATT_CLIENT_IN_WRONG_STATE; 5156 } 5157 5158 // check if connection was just disconnected 5159 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5160 log_info("gap_connect: send create connection (again)"); 5161 conn->state = SEND_CREATE_CONNECTION; 5162 hci_run(); 5163 return ERROR_CODE_SUCCESS; 5164 } 5165 5166 log_info("gap_connect: context exists with state %u", conn->state); 5167 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5168 hci_run(); 5169 return ERROR_CODE_SUCCESS; 5170 } 5171 5172 // @assumption: only a single outgoing LE Connection exists 5173 static hci_connection_t * gap_get_outgoing_connection(void){ 5174 btstack_linked_item_t *it; 5175 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5176 hci_connection_t * conn = (hci_connection_t *) it; 5177 if (!hci_is_le_connection(conn)) continue; 5178 switch (conn->state){ 5179 case SEND_CREATE_CONNECTION: 5180 case SENT_CREATE_CONNECTION: 5181 case SENT_CANCEL_CONNECTION: 5182 return conn; 5183 default: 5184 break; 5185 }; 5186 } 5187 return NULL; 5188 } 5189 5190 uint8_t gap_connect_cancel(void){ 5191 hci_connection_t * conn = gap_get_outgoing_connection(); 5192 if (!conn) return 0; 5193 switch (conn->state){ 5194 case SEND_CREATE_CONNECTION: 5195 // skip sending create connection and emit event instead 5196 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5197 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5198 btstack_memory_hci_connection_free( conn ); 5199 break; 5200 case SENT_CREATE_CONNECTION: 5201 // request to send cancel connection 5202 conn->state = SEND_CANCEL_CONNECTION; 5203 hci_run(); 5204 break; 5205 default: 5206 break; 5207 } 5208 return 0; 5209 } 5210 #endif 5211 5212 #ifdef ENABLE_LE_CENTRAL 5213 /** 5214 * @brief Set connection parameters for outgoing connections 5215 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5216 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5217 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5218 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5219 * @param conn_latency, default: 4 5220 * @param supervision_timeout (unit: 10ms), default: 720 ms 5221 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5222 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5223 */ 5224 5225 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5226 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5227 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5228 hci_stack->le_connection_scan_interval = conn_scan_interval; 5229 hci_stack->le_connection_scan_window = conn_scan_window; 5230 hci_stack->le_connection_interval_min = conn_interval_min; 5231 hci_stack->le_connection_interval_max = conn_interval_max; 5232 hci_stack->le_connection_latency = conn_latency; 5233 hci_stack->le_supervision_timeout = supervision_timeout; 5234 hci_stack->le_minimum_ce_length = min_ce_length; 5235 hci_stack->le_maximum_ce_length = max_ce_length; 5236 } 5237 #endif 5238 5239 /** 5240 * @brief Updates the connection parameters for a given LE connection 5241 * @param handle 5242 * @param conn_interval_min (unit: 1.25ms) 5243 * @param conn_interval_max (unit: 1.25ms) 5244 * @param conn_latency 5245 * @param supervision_timeout (unit: 10ms) 5246 * @returns 0 if ok 5247 */ 5248 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5249 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5250 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5251 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5252 connection->le_conn_interval_min = conn_interval_min; 5253 connection->le_conn_interval_max = conn_interval_max; 5254 connection->le_conn_latency = conn_latency; 5255 connection->le_supervision_timeout = supervision_timeout; 5256 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5257 hci_run(); 5258 return 0; 5259 } 5260 5261 /** 5262 * @brief Request an update of the connection parameter for a given LE connection 5263 * @param handle 5264 * @param conn_interval_min (unit: 1.25ms) 5265 * @param conn_interval_max (unit: 1.25ms) 5266 * @param conn_latency 5267 * @param supervision_timeout (unit: 10ms) 5268 * @returns 0 if ok 5269 */ 5270 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5271 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5272 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5273 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5274 connection->le_conn_interval_min = conn_interval_min; 5275 connection->le_conn_interval_max = conn_interval_max; 5276 connection->le_conn_latency = conn_latency; 5277 connection->le_supervision_timeout = supervision_timeout; 5278 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5279 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5280 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5281 return 0; 5282 } 5283 5284 #ifdef ENABLE_LE_PERIPHERAL 5285 5286 /** 5287 * @brief Set Advertisement Data 5288 * @param advertising_data_length 5289 * @param advertising_data (max 31 octets) 5290 * @note data is not copied, pointer has to stay valid 5291 */ 5292 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5293 hci_stack->le_advertisements_data_len = advertising_data_length; 5294 hci_stack->le_advertisements_data = advertising_data; 5295 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5296 hci_run(); 5297 } 5298 5299 /** 5300 * @brief Set Scan Response Data 5301 * @param advertising_data_length 5302 * @param advertising_data (max 31 octets) 5303 * @note data is not copied, pointer has to stay valid 5304 */ 5305 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5306 hci_stack->le_scan_response_data_len = scan_response_data_length; 5307 hci_stack->le_scan_response_data = scan_response_data; 5308 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5309 hci_run(); 5310 } 5311 5312 /** 5313 * @brief Set Advertisement Parameters 5314 * @param adv_int_min 5315 * @param adv_int_max 5316 * @param adv_type 5317 * @param direct_address_type 5318 * @param direct_address 5319 * @param channel_map 5320 * @param filter_policy 5321 * 5322 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5323 */ 5324 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5325 uint8_t direct_address_typ, bd_addr_t direct_address, 5326 uint8_t channel_map, uint8_t filter_policy) { 5327 5328 hci_stack->le_advertisements_interval_min = adv_int_min; 5329 hci_stack->le_advertisements_interval_max = adv_int_max; 5330 hci_stack->le_advertisements_type = adv_type; 5331 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5332 hci_stack->le_advertisements_channel_map = channel_map; 5333 hci_stack->le_advertisements_filter_policy = filter_policy; 5334 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5335 6); 5336 5337 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5338 hci_run(); 5339 } 5340 5341 /** 5342 * @brief Enable/Disable Advertisements 5343 * @param enabled 5344 */ 5345 void gap_advertisements_enable(int enabled){ 5346 hci_stack->le_advertisements_enabled = enabled != 0; 5347 hci_update_advertisements_enabled_for_current_roles(); 5348 hci_run(); 5349 } 5350 5351 #endif 5352 5353 void hci_le_set_own_address_type(uint8_t own_address_type){ 5354 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5355 if (own_address_type == hci_stack->le_own_addr_type) return; 5356 hci_stack->le_own_addr_type = own_address_type; 5357 5358 #ifdef ENABLE_LE_PERIPHERAL 5359 // update advertisement parameters, too 5360 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5361 hci_run(); 5362 #endif 5363 #ifdef ENABLE_LE_CENTRAL 5364 // note: we don't update scan parameters or modify ongoing connection attempts 5365 #endif 5366 } 5367 5368 #endif 5369 5370 uint8_t gap_disconnect(hci_con_handle_t handle){ 5371 hci_connection_t * conn = hci_connection_for_handle(handle); 5372 if (!conn){ 5373 hci_emit_disconnection_complete(handle, 0); 5374 return 0; 5375 } 5376 // ignore if already disconnected 5377 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5378 return 0; 5379 } 5380 conn->state = SEND_DISCONNECT; 5381 hci_run(); 5382 return 0; 5383 } 5384 5385 int gap_read_rssi(hci_con_handle_t con_handle){ 5386 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5387 if (hci_connection == NULL) return 0; 5388 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5389 hci_run(); 5390 return 1; 5391 } 5392 5393 /** 5394 * @brief Get connection type 5395 * @param con_handle 5396 * @result connection_type 5397 */ 5398 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5399 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5400 if (!conn) return GAP_CONNECTION_INVALID; 5401 switch (conn->address_type){ 5402 case BD_ADDR_TYPE_LE_PUBLIC: 5403 case BD_ADDR_TYPE_LE_RANDOM: 5404 return GAP_CONNECTION_LE; 5405 case BD_ADDR_TYPE_SCO: 5406 return GAP_CONNECTION_SCO; 5407 case BD_ADDR_TYPE_ACL: 5408 return GAP_CONNECTION_ACL; 5409 default: 5410 return GAP_CONNECTION_INVALID; 5411 } 5412 } 5413 5414 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5415 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5416 if (!conn) return HCI_ROLE_INVALID; 5417 return (hci_role_t) conn->role; 5418 } 5419 5420 5421 #ifdef ENABLE_CLASSIC 5422 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5423 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5424 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5425 conn->request_role = role; 5426 hci_run(); 5427 return ERROR_CODE_SUCCESS; 5428 } 5429 #endif 5430 5431 #ifdef ENABLE_BLE 5432 5433 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){ 5434 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5435 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5436 5437 conn->le_phy_update_all_phys = all_phys; 5438 conn->le_phy_update_tx_phys = tx_phys; 5439 conn->le_phy_update_rx_phys = rx_phys; 5440 conn->le_phy_update_phy_options = phy_options; 5441 5442 hci_run(); 5443 5444 return 0; 5445 } 5446 5447 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5448 // check if already in list 5449 btstack_linked_list_iterator_t it; 5450 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5451 while (btstack_linked_list_iterator_has_next(&it)) { 5452 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5453 if (entry->address_type != address_type) { 5454 continue; 5455 } 5456 if (memcmp(entry->address, address, 6) != 0) { 5457 continue; 5458 } 5459 // disallow if already scheduled to add 5460 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5461 return ERROR_CODE_COMMAND_DISALLOWED; 5462 } 5463 // still on controller, but scheduled to remove -> re-add 5464 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5465 return ERROR_CODE_SUCCESS; 5466 } 5467 // alloc and add to list 5468 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5469 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5470 entry->address_type = address_type; 5471 (void)memcpy(entry->address, address, 6); 5472 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5473 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5474 return ERROR_CODE_SUCCESS; 5475 } 5476 5477 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 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->address_type != address_type) { 5483 continue; 5484 } 5485 if (memcmp(entry->address, address, 6) != 0) { 5486 continue; 5487 } 5488 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5489 // remove from controller if already present 5490 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5491 } else { 5492 // directly remove entry from whitelist 5493 btstack_linked_list_iterator_remove(&it); 5494 btstack_memory_whitelist_entry_free(entry); 5495 } 5496 return ERROR_CODE_SUCCESS; 5497 } 5498 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5499 } 5500 5501 static void hci_whitelist_clear(void){ 5502 btstack_linked_list_iterator_t it; 5503 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5504 while (btstack_linked_list_iterator_has_next(&it)){ 5505 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5506 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5507 // remove from controller if already present 5508 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5509 continue; 5510 } 5511 // directly remove entry from whitelist 5512 btstack_linked_list_iterator_remove(&it); 5513 btstack_memory_whitelist_entry_free(entry); 5514 } 5515 } 5516 5517 /** 5518 * @brief Clear Whitelist 5519 * @returns 0 if ok 5520 */ 5521 uint8_t gap_whitelist_clear(void){ 5522 hci_whitelist_clear(); 5523 hci_run(); 5524 return ERROR_CODE_SUCCESS; 5525 } 5526 5527 /** 5528 * @brief Add Device to Whitelist 5529 * @param address_typ 5530 * @param address 5531 * @returns 0 if ok 5532 */ 5533 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5534 uint8_t status = hci_whitelist_add(address_type, address); 5535 if (status){ 5536 return status; 5537 } 5538 hci_run(); 5539 return ERROR_CODE_SUCCESS; 5540 } 5541 5542 /** 5543 * @brief Remove Device from Whitelist 5544 * @param address_typ 5545 * @param address 5546 * @returns 0 if ok 5547 */ 5548 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5549 uint8_t status = hci_whitelist_remove(address_type, address); 5550 if (status){ 5551 return status; 5552 } 5553 hci_run(); 5554 return ERROR_CODE_SUCCESS; 5555 } 5556 5557 #ifdef ENABLE_LE_CENTRAL 5558 /** 5559 * @brief Connect with Whitelist 5560 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5561 * @returns - if ok 5562 */ 5563 uint8_t gap_connect_with_whitelist(void){ 5564 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5565 return ERROR_CODE_COMMAND_DISALLOWED; 5566 } 5567 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5568 hci_run(); 5569 return ERROR_CODE_SUCCESS; 5570 } 5571 5572 /** 5573 * @brief Auto Connection Establishment - Start Connecting to device 5574 * @param address_typ 5575 * @param address 5576 * @returns 0 if ok 5577 */ 5578 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5579 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5580 return ERROR_CODE_COMMAND_DISALLOWED; 5581 } 5582 5583 uint8_t status = hci_whitelist_add(address_type, address); 5584 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5585 return status; 5586 } 5587 5588 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5589 5590 hci_run(); 5591 return ERROR_CODE_SUCCESS; 5592 } 5593 5594 /** 5595 * @brief Auto Connection Establishment - Stop Connecting to device 5596 * @param address_typ 5597 * @param address 5598 * @returns 0 if ok 5599 */ 5600 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5601 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5602 return ERROR_CODE_COMMAND_DISALLOWED; 5603 } 5604 5605 hci_whitelist_remove(address_type, address); 5606 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5607 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5608 } 5609 hci_run(); 5610 return 0; 5611 } 5612 5613 /** 5614 * @brief Auto Connection Establishment - Stop everything 5615 * @note Convenience function to stop all active auto connection attempts 5616 */ 5617 uint8_t gap_auto_connection_stop_all(void){ 5618 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5619 return ERROR_CODE_COMMAND_DISALLOWED; 5620 } 5621 hci_whitelist_clear(); 5622 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5623 hci_run(); 5624 return ERROR_CODE_SUCCESS; 5625 } 5626 5627 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5628 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5629 if (!conn) return 0; 5630 return conn->le_connection_interval; 5631 } 5632 #endif 5633 #endif 5634 5635 #ifdef ENABLE_CLASSIC 5636 /** 5637 * @brief Set Extended Inquiry Response data 5638 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5639 * @note has to be done before stack starts up 5640 */ 5641 void gap_set_extended_inquiry_response(const uint8_t * data){ 5642 hci_stack->eir_data = data; 5643 } 5644 5645 /** 5646 * @brief Start GAP Classic Inquiry 5647 * @param duration in 1.28s units 5648 * @return 0 if ok 5649 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5650 */ 5651 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5652 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5653 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5654 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5655 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5656 } 5657 hci_stack->inquiry_state = duration_in_1280ms_units; 5658 hci_run(); 5659 return 0; 5660 } 5661 5662 /** 5663 * @brief Stop GAP Classic Inquiry 5664 * @returns 0 if ok 5665 */ 5666 int gap_inquiry_stop(void){ 5667 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5668 // emit inquiry complete event, before it even started 5669 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5670 hci_emit_event(event, sizeof(event), 1); 5671 return 0; 5672 } 5673 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5674 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5675 hci_run(); 5676 return 0; 5677 } 5678 5679 5680 /** 5681 * @brief Remote Name Request 5682 * @param addr 5683 * @param page_scan_repetition_mode 5684 * @param clock_offset only used when bit 15 is set 5685 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5686 */ 5687 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5688 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5689 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5690 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5691 hci_stack->remote_name_clock_offset = clock_offset; 5692 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5693 hci_run(); 5694 return 0; 5695 } 5696 5697 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5698 hci_stack->gap_pairing_state = state; 5699 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5700 hci_run(); 5701 return 0; 5702 } 5703 5704 /** 5705 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5706 * @param addr 5707 * @param pin_data 5708 * @param pin_len 5709 * @return 0 if ok 5710 */ 5711 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5712 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5713 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5714 hci_stack->gap_pairing_pin_len = pin_len; 5715 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5716 } 5717 5718 /** 5719 * @brief Legacy Pairing Pin Code Response 5720 * @param addr 5721 * @param pin 5722 * @return 0 if ok 5723 */ 5724 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5725 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5726 } 5727 5728 /** 5729 * @brief Abort Legacy Pairing 5730 * @param addr 5731 * @param pin 5732 * @return 0 if ok 5733 */ 5734 int gap_pin_code_negative(bd_addr_t addr){ 5735 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5736 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5737 } 5738 5739 /** 5740 * @brief SSP Passkey Response 5741 * @param addr 5742 * @param passkey 5743 * @return 0 if ok 5744 */ 5745 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5746 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5747 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5748 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5749 } 5750 5751 /** 5752 * @brief Abort SSP Passkey Entry/Pairing 5753 * @param addr 5754 * @param pin 5755 * @return 0 if ok 5756 */ 5757 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5758 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5759 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5760 } 5761 5762 /** 5763 * @brief Accept SSP Numeric Comparison 5764 * @param addr 5765 * @param passkey 5766 * @return 0 if ok 5767 */ 5768 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5769 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5770 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5771 } 5772 5773 /** 5774 * @brief Abort SSP Numeric Comparison/Pairing 5775 * @param addr 5776 * @param pin 5777 * @return 0 if ok 5778 */ 5779 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5780 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5781 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5782 } 5783 5784 /** 5785 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5786 * @param inquiry_mode see bluetooth_defines.h 5787 */ 5788 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5789 hci_stack->inquiry_mode = mode; 5790 } 5791 5792 /** 5793 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5794 */ 5795 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5796 hci_stack->sco_voice_setting = voice_setting; 5797 } 5798 5799 /** 5800 * @brief Get SCO Voice Setting 5801 * @return current voice setting 5802 */ 5803 uint16_t hci_get_sco_voice_setting(void){ 5804 return hci_stack->sco_voice_setting; 5805 } 5806 5807 static int hci_have_usb_transport(void){ 5808 if (!hci_stack->hci_transport) return 0; 5809 const char * transport_name = hci_stack->hci_transport->name; 5810 if (!transport_name) return 0; 5811 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5812 } 5813 5814 /** @brief Get SCO packet length for current SCO Voice setting 5815 * @note Using SCO packets of the exact length is required for USB transfer 5816 * @return Length of SCO packets in bytes (not audio frames) 5817 */ 5818 int hci_get_sco_packet_length(void){ 5819 int sco_packet_length = 0; 5820 5821 #ifdef ENABLE_SCO_OVER_HCI 5822 5823 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5824 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5825 5826 if (hci_have_usb_transport()){ 5827 // see Core Spec for H2 USB Transfer. 5828 // 3 byte SCO header + 24 bytes per connection 5829 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5830 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5831 } else { 5832 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5833 sco_packet_length = 3 + 60 * multiplier; 5834 // assert that it still fits inside an SCO buffer 5835 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5836 sco_packet_length = 3 + 60; 5837 } 5838 } 5839 #endif 5840 return sco_packet_length; 5841 } 5842 5843 /** 5844 * @brief Sets the master/slave policy 5845 * @param policy (0: attempt to become master, 1: let connecting device decide) 5846 */ 5847 void hci_set_master_slave_policy(uint8_t policy){ 5848 hci_stack->master_slave_policy = policy; 5849 } 5850 5851 #endif 5852 5853 HCI_STATE hci_get_state(void){ 5854 return hci_stack->state; 5855 } 5856 5857 #ifdef ENABLE_CLASSIC 5858 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5859 hci_stack->gap_classic_accept_callback = accept_callback; 5860 } 5861 #endif 5862 5863 /** 5864 * @brief Set callback for Bluetooth Hardware Error 5865 */ 5866 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5867 hci_stack->hardware_error_callback = fn; 5868 } 5869 5870 void hci_disconnect_all(void){ 5871 btstack_linked_list_iterator_t it; 5872 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5873 while (btstack_linked_list_iterator_has_next(&it)){ 5874 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5875 if (con->state == SENT_DISCONNECT) continue; 5876 con->state = SEND_DISCONNECT; 5877 } 5878 hci_run(); 5879 } 5880 5881 uint16_t hci_get_manufacturer(void){ 5882 return hci_stack->manufacturer; 5883 } 5884 5885 #ifdef ENABLE_BLE 5886 5887 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5888 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5889 if (!hci_con) return NULL; 5890 return &hci_con->sm_connection; 5891 } 5892 5893 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5894 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5895 5896 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5897 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5898 if (hci_connection == NULL) return 0; 5899 if (hci_is_le_connection(hci_connection)){ 5900 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5901 if (sm_conn->sm_connection_encrypted) { 5902 return sm_conn->sm_actual_encryption_key_size; 5903 } 5904 } 5905 #ifdef ENABLE_CLASSIC 5906 else { 5907 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5908 return hci_connection->encryption_key_size; 5909 } 5910 } 5911 #endif 5912 return 0; 5913 } 5914 5915 int gap_authenticated(hci_con_handle_t con_handle){ 5916 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5917 if (hci_connection == NULL) return 0; 5918 5919 switch (hci_connection->address_type){ 5920 case BD_ADDR_TYPE_LE_PUBLIC: 5921 case BD_ADDR_TYPE_LE_RANDOM: 5922 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5923 return hci_connection->sm_connection.sm_connection_authenticated; 5924 #ifdef ENABLE_CLASSIC 5925 case BD_ADDR_TYPE_SCO: 5926 case BD_ADDR_TYPE_ACL: 5927 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5928 #endif 5929 default: 5930 return 0; 5931 } 5932 } 5933 5934 int gap_secure_connection(hci_con_handle_t con_handle){ 5935 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5936 if (hci_connection == NULL) return 0; 5937 5938 switch (hci_connection->address_type){ 5939 case BD_ADDR_TYPE_LE_PUBLIC: 5940 case BD_ADDR_TYPE_LE_RANDOM: 5941 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5942 return hci_connection->sm_connection.sm_connection_sc; 5943 #ifdef ENABLE_CLASSIC 5944 case BD_ADDR_TYPE_SCO: 5945 case BD_ADDR_TYPE_ACL: 5946 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5947 #endif 5948 default: 5949 return 0; 5950 } 5951 } 5952 5953 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5954 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5955 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5956 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5957 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5958 return sm_conn->sm_connection_authorization_state; 5959 } 5960 #endif 5961 5962 #ifdef ENABLE_CLASSIC 5963 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){ 5964 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5965 if (!conn) return GAP_CONNECTION_INVALID; 5966 conn->sniff_min_interval = sniff_min_interval; 5967 conn->sniff_max_interval = sniff_max_interval; 5968 conn->sniff_attempt = sniff_attempt; 5969 conn->sniff_timeout = sniff_timeout; 5970 hci_run(); 5971 return 0; 5972 } 5973 5974 /** 5975 * @brief Exit Sniff mode 5976 * @param con_handle 5977 @ @return 0 if ok 5978 */ 5979 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5980 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5981 if (!conn) return GAP_CONNECTION_INVALID; 5982 conn->sniff_min_interval = 0xffff; 5983 hci_run(); 5984 return 0; 5985 } 5986 #endif 5987 5988 void hci_halting_defer(void){ 5989 if (hci_stack->state != HCI_STATE_HALTING) return; 5990 switch (hci_stack->substate){ 5991 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5992 case HCI_HALTING_CLOSE: 5993 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5994 break; 5995 default: 5996 break; 5997 } 5998 } 5999 6000 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6001 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6002 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6003 if (le_device_db_index >= le_device_db_max_count()) return; 6004 uint8_t offset = le_device_db_index >> 3; 6005 uint8_t mask = 1 << (le_device_db_index & 7); 6006 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6007 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6008 // note: go back to remove entries, otherwise, a remove + add will skip the add 6009 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6010 } 6011 } 6012 6013 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6014 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6015 if (le_device_db_index >= le_device_db_max_count()) return; 6016 uint8_t offset = le_device_db_index >> 3; 6017 uint8_t mask = 1 << (le_device_db_index & 7); 6018 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6019 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6020 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6021 } 6022 } 6023 6024 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6025 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6026 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6027 } 6028 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6029 // restart le resolving list update 6030 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6031 } 6032 return ERROR_CODE_SUCCESS; 6033 } 6034 #endif 6035 6036 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6037 void hci_setup_test_connections_fuzz(void){ 6038 hci_connection_t * conn; 6039 6040 // default address: 66:55:44:33:00:01 6041 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6042 6043 // setup Controller info 6044 hci_stack->num_cmd_packets = 255; 6045 hci_stack->acl_packets_total_num = 255; 6046 6047 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6048 addr[5] = 0x01; 6049 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6050 conn->con_handle = addr[5]; 6051 conn->role = HCI_ROLE_SLAVE; 6052 conn->state = RECEIVED_CONNECTION_REQUEST; 6053 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6054 6055 // setup incoming Classic SCO connection with con handle 0x0002 6056 addr[5] = 0x02; 6057 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6058 conn->con_handle = addr[5]; 6059 conn->role = HCI_ROLE_SLAVE; 6060 conn->state = RECEIVED_CONNECTION_REQUEST; 6061 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6062 6063 // setup ready Classic ACL connection with con handle 0x0003 6064 addr[5] = 0x03; 6065 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6066 conn->con_handle = addr[5]; 6067 conn->role = HCI_ROLE_SLAVE; 6068 conn->state = OPEN; 6069 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6070 6071 // setup ready Classic SCO connection with con handle 0x0004 6072 addr[5] = 0x04; 6073 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6074 conn->con_handle = addr[5]; 6075 conn->role = HCI_ROLE_SLAVE; 6076 conn->state = OPEN; 6077 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6078 6079 // setup ready LE ACL connection with con handle 0x005 and public address 6080 addr[5] = 0x05; 6081 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6082 conn->con_handle = addr[5]; 6083 conn->role = HCI_ROLE_SLAVE; 6084 conn->state = OPEN; 6085 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6086 } 6087 6088 void hci_free_connections_fuzz(void){ 6089 btstack_linked_list_iterator_t it; 6090 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6091 while (btstack_linked_list_iterator_has_next(&it)){ 6092 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6093 btstack_linked_list_iterator_remove(&it); 6094 btstack_memory_hci_connection_free(con); 6095 } 6096 } 6097 void hci_simulate_working_fuzz(void){ 6098 hci_init_done(); 6099 hci_stack->num_cmd_packets = 255; 6100 } 6101 #endif 6102