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 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 405 return hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 406 } 407 408 void gap_delete_all_link_keys(void){ 409 bd_addr_t addr; 410 link_key_t link_key; 411 link_key_type_t type; 412 btstack_link_key_iterator_t it; 413 int ok = gap_link_key_iterator_init(&it); 414 if (!ok) { 415 log_error("could not initialize iterator"); 416 return; 417 } 418 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 419 gap_drop_link_key_for_bd_addr(addr); 420 } 421 gap_link_key_iterator_done(&it); 422 } 423 424 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return 0; 426 if (!hci_stack->link_key_db->iterator_init) return 0; 427 return hci_stack->link_key_db->iterator_init(it); 428 } 429 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){ 430 if (!hci_stack->link_key_db) return 0; 431 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 432 } 433 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 434 if (!hci_stack->link_key_db) return; 435 hci_stack->link_key_db->iterator_done(it); 436 } 437 #endif 438 439 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 440 switch (address_type){ 441 case BD_ADDR_TYPE_LE_PUBLIC: 442 case BD_ADDR_TYPE_LE_RANDOM: 443 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 444 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 445 return true; 446 default: 447 return false; 448 } 449 } 450 451 static int hci_is_le_connection(hci_connection_t * connection){ 452 return hci_is_le_connection_type(connection->address_type); 453 } 454 455 /** 456 * count connections 457 */ 458 static int nr_hci_connections(void){ 459 int count = 0; 460 btstack_linked_item_t *it; 461 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 462 count++; 463 } 464 return count; 465 } 466 467 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 468 469 unsigned int num_packets_sent_classic = 0; 470 unsigned int num_packets_sent_le = 0; 471 472 btstack_linked_item_t *it; 473 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 474 hci_connection_t * connection = (hci_connection_t *) it; 475 if (hci_is_le_connection(connection)){ 476 num_packets_sent_le += connection->num_packets_sent; 477 } 478 if (connection->address_type == BD_ADDR_TYPE_ACL){ 479 num_packets_sent_classic += connection->num_packets_sent; 480 } 481 } 482 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 483 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 484 int free_slots_le = 0; 485 486 if (free_slots_classic < 0){ 487 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); 488 return 0; 489 } 490 491 if (hci_stack->le_acl_packets_total_num){ 492 // if we have LE slots, they are used 493 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 494 if (free_slots_le < 0){ 495 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); 496 return 0; 497 } 498 } else { 499 // otherwise, classic slots are used for LE, too 500 free_slots_classic -= num_packets_sent_le; 501 if (free_slots_classic < 0){ 502 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); 503 return 0; 504 } 505 } 506 507 switch (address_type){ 508 case BD_ADDR_TYPE_UNKNOWN: 509 log_error("hci_number_free_acl_slots: unknown address type"); 510 return 0; 511 512 case BD_ADDR_TYPE_ACL: 513 return free_slots_classic; 514 515 default: 516 if (hci_stack->le_acl_packets_total_num){ 517 return free_slots_le; 518 } 519 return free_slots_classic; 520 } 521 } 522 523 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 524 // get connection type 525 hci_connection_t * connection = hci_connection_for_handle(con_handle); 526 if (!connection){ 527 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 528 return 0; 529 } 530 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 531 } 532 533 #ifdef ENABLE_CLASSIC 534 static int hci_number_free_sco_slots(void){ 535 unsigned int num_sco_packets_sent = 0; 536 btstack_linked_item_t *it; 537 if (hci_stack->synchronous_flow_control_enabled){ 538 // explicit flow control 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 num_sco_packets_sent += connection->num_packets_sent; 543 } 544 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 545 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 546 return 0; 547 } 548 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 549 } else { 550 // implicit flow control -- TODO 551 int num_ready = 0; 552 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 553 hci_connection_t * connection = (hci_connection_t *) it; 554 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 555 if (connection->sco_tx_ready == 0) continue; 556 num_ready++; 557 } 558 return num_ready; 559 } 560 } 561 #endif 562 563 // only used to send HCI Host Number Completed Packets 564 static int hci_can_send_comand_packet_transport(void){ 565 if (hci_stack->hci_packet_buffer_reserved) return 0; 566 567 // check for async hci transport implementations 568 if (hci_stack->hci_transport->can_send_packet_now){ 569 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 570 return 0; 571 } 572 } 573 return 1; 574 } 575 576 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 577 int hci_can_send_command_packet_now(void){ 578 if (hci_can_send_comand_packet_transport() == 0) return 0; 579 return hci_stack->num_cmd_packets > 0u; 580 } 581 582 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 583 // check for async hci transport implementations 584 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 585 return hci_stack->hci_transport->can_send_packet_now(packet_type); 586 } 587 588 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 589 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 590 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 591 } 592 593 int hci_can_send_acl_le_packet_now(void){ 594 if (hci_stack->hci_packet_buffer_reserved) return 0; 595 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 596 } 597 598 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 599 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 600 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 601 } 602 603 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 604 if (hci_stack->hci_packet_buffer_reserved) return 0; 605 return hci_can_send_prepared_acl_packet_now(con_handle); 606 } 607 608 #ifdef ENABLE_CLASSIC 609 int hci_can_send_acl_classic_packet_now(void){ 610 if (hci_stack->hci_packet_buffer_reserved) return 0; 611 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 612 } 613 614 int hci_can_send_prepared_sco_packet_now(void){ 615 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 616 if (hci_have_usb_transport()){ 617 return hci_stack->sco_can_send_now; 618 } else { 619 return hci_number_free_sco_slots() > 0; 620 } 621 } 622 623 int hci_can_send_sco_packet_now(void){ 624 if (hci_stack->hci_packet_buffer_reserved) return 0; 625 return hci_can_send_prepared_sco_packet_now(); 626 } 627 628 void hci_request_sco_can_send_now_event(void){ 629 hci_stack->sco_waiting_for_can_send_now = 1; 630 hci_notify_if_sco_can_send_now(); 631 } 632 #endif 633 634 // used for internal checks in l2cap.c 635 int hci_is_packet_buffer_reserved(void){ 636 return hci_stack->hci_packet_buffer_reserved; 637 } 638 639 // reserves outgoing packet buffer. @returns 1 if successful 640 int hci_reserve_packet_buffer(void){ 641 if (hci_stack->hci_packet_buffer_reserved) { 642 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 643 return 0; 644 } 645 hci_stack->hci_packet_buffer_reserved = 1; 646 return 1; 647 } 648 649 void hci_release_packet_buffer(void){ 650 hci_stack->hci_packet_buffer_reserved = 0; 651 } 652 653 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 654 static int hci_transport_synchronous(void){ 655 return hci_stack->hci_transport->can_send_packet_now == NULL; 656 } 657 658 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 659 660 // 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); 661 662 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 663 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 664 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 665 max_acl_data_packet_length = hci_stack->le_data_packets_length; 666 } 667 668 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 669 if (hci_is_le_connection(connection)){ 670 max_acl_data_packet_length = connection->le_max_tx_octets; 671 } 672 #endif 673 674 log_debug("hci_send_acl_packet_fragments entered"); 675 676 int err; 677 // multiple packets could be send on a synchronous HCI transport 678 while (true){ 679 680 log_debug("hci_send_acl_packet_fragments loop entered"); 681 682 // get current data 683 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 684 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 685 int more_fragments = 0; 686 687 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 688 if (current_acl_data_packet_length > max_acl_data_packet_length){ 689 more_fragments = 1; 690 current_acl_data_packet_length = max_acl_data_packet_length; 691 } 692 693 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 694 if (acl_header_pos > 0u){ 695 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 696 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 697 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 698 } 699 700 // update header len 701 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 702 703 // count packet 704 connection->num_packets_sent++; 705 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 706 707 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 708 if (more_fragments){ 709 // update start of next fragment to send 710 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 711 } else { 712 // done 713 hci_stack->acl_fragmentation_pos = 0; 714 hci_stack->acl_fragmentation_total_size = 0; 715 } 716 717 // send packet 718 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 719 const int size = current_acl_data_packet_length + 4; 720 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 721 hci_stack->acl_fragmentation_tx_active = 1; 722 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 723 724 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 725 726 // done yet? 727 if (!more_fragments) break; 728 729 // can send more? 730 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 731 } 732 733 log_debug("hci_send_acl_packet_fragments loop over"); 734 735 // release buffer now for synchronous transport 736 if (hci_transport_synchronous()){ 737 hci_stack->acl_fragmentation_tx_active = 0; 738 hci_release_packet_buffer(); 739 hci_emit_transport_packet_sent(); 740 } 741 742 return err; 743 } 744 745 // pre: caller has reserved the packet buffer 746 int hci_send_acl_packet_buffer(int size){ 747 748 // log_info("hci_send_acl_packet_buffer size %u", size); 749 750 if (!hci_stack->hci_packet_buffer_reserved) { 751 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 752 return 0; 753 } 754 755 uint8_t * packet = hci_stack->hci_packet_buffer; 756 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 757 758 // check for free places on Bluetooth module 759 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 760 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 761 hci_release_packet_buffer(); 762 hci_emit_transport_packet_sent(); 763 return BTSTACK_ACL_BUFFERS_FULL; 764 } 765 766 hci_connection_t *connection = hci_connection_for_handle( con_handle); 767 if (!connection) { 768 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 769 hci_release_packet_buffer(); 770 hci_emit_transport_packet_sent(); 771 return 0; 772 } 773 774 #ifdef ENABLE_CLASSIC 775 hci_connection_timestamp(connection); 776 #endif 777 778 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 779 780 // setup data 781 hci_stack->acl_fragmentation_total_size = size; 782 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 783 784 return hci_send_acl_packet_fragments(connection); 785 } 786 787 #ifdef ENABLE_CLASSIC 788 // pre: caller has reserved the packet buffer 789 int hci_send_sco_packet_buffer(int size){ 790 791 // log_info("hci_send_acl_packet_buffer size %u", size); 792 793 if (!hci_stack->hci_packet_buffer_reserved) { 794 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 795 return 0; 796 } 797 798 uint8_t * packet = hci_stack->hci_packet_buffer; 799 800 // skip checks in loopback mode 801 if (!hci_stack->loopback_mode){ 802 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 803 804 // check for free places on Bluetooth module 805 if (!hci_can_send_prepared_sco_packet_now()) { 806 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 807 hci_release_packet_buffer(); 808 hci_emit_transport_packet_sent(); 809 return BTSTACK_ACL_BUFFERS_FULL; 810 } 811 812 // track send packet in connection struct 813 hci_connection_t *connection = hci_connection_for_handle( con_handle); 814 if (!connection) { 815 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return 0; 819 } 820 821 if (hci_have_usb_transport()){ 822 // token used 823 hci_stack->sco_can_send_now = 0; 824 } else { 825 if (hci_stack->synchronous_flow_control_enabled){ 826 connection->num_packets_sent++; 827 } else { 828 connection->sco_tx_ready--; 829 } 830 } 831 } 832 833 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 834 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 835 836 if (hci_transport_synchronous()){ 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 } 840 841 return err; 842 } 843 #endif 844 845 static void acl_handler(uint8_t *packet, uint16_t size){ 846 847 // get info 848 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 849 hci_connection_t *conn = hci_connection_for_handle(con_handle); 850 uint8_t acl_flags = READ_ACL_FLAGS(packet); 851 uint16_t acl_length = READ_ACL_LENGTH(packet); 852 853 // ignore non-registered handle 854 if (!conn){ 855 log_error("acl_handler called with non-registered handle %u!" , con_handle); 856 return; 857 } 858 859 // assert packet is complete 860 if ((acl_length + 4u) != size){ 861 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 862 return; 863 } 864 865 #ifdef ENABLE_CLASSIC 866 // update idle timestamp 867 hci_connection_timestamp(conn); 868 #endif 869 870 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 871 hci_stack->host_completed_packets = 1; 872 conn->num_packets_completed++; 873 #endif 874 875 // handle different packet types 876 switch (acl_flags & 0x03u) { 877 878 case 0x01: // continuation fragment 879 880 // sanity checks 881 if (conn->acl_recombination_pos == 0u) { 882 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 883 return; 884 } 885 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 886 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 887 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 888 conn->acl_recombination_pos = 0; 889 return; 890 } 891 892 // append fragment payload (header already stored) 893 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 894 &packet[4], acl_length); 895 conn->acl_recombination_pos += acl_length; 896 897 // forward complete L2CAP packet if complete. 898 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 899 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 900 // reset recombination buffer 901 conn->acl_recombination_length = 0; 902 conn->acl_recombination_pos = 0; 903 } 904 break; 905 906 case 0x02: { // first fragment 907 908 // sanity check 909 if (conn->acl_recombination_pos) { 910 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 911 conn->acl_recombination_pos = 0; 912 } 913 914 // peek into L2CAP packet! 915 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 916 917 // compare fragment size to L2CAP packet size 918 if (acl_length >= (l2cap_length + 4u)){ 919 // forward fragment as L2CAP packet 920 hci_emit_acl_packet(packet, acl_length + 4u); 921 } else { 922 923 if (acl_length > HCI_ACL_BUFFER_SIZE){ 924 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 925 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 926 return; 927 } 928 929 // store first fragment and tweak acl length for complete package 930 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 931 packet, acl_length + 4u); 932 conn->acl_recombination_pos = acl_length + 4u; 933 conn->acl_recombination_length = l2cap_length; 934 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 935 } 936 break; 937 938 } 939 default: 940 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 941 return; 942 } 943 944 // execute main loop 945 hci_run(); 946 } 947 948 static void hci_shutdown_connection(hci_connection_t *conn){ 949 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 950 951 #ifdef ENABLE_CLASSIC 952 #ifdef ENABLE_SCO_OVER_HCI 953 int addr_type = conn->address_type; 954 #endif 955 #endif 956 957 btstack_run_loop_remove_timer(&conn->timeout); 958 959 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 960 btstack_memory_hci_connection_free( conn ); 961 962 // now it's gone 963 hci_emit_nr_connections_changed(); 964 965 #ifdef ENABLE_CLASSIC 966 #ifdef ENABLE_SCO_OVER_HCI 967 // update SCO 968 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 969 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 970 } 971 #endif 972 #endif 973 } 974 975 #ifdef ENABLE_CLASSIC 976 977 static const uint16_t packet_type_sizes[] = { 978 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 979 HCI_ACL_DH1_SIZE, 0, 0, 0, 980 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 981 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 982 }; 983 static const uint8_t packet_type_feature_requirement_bit[] = { 984 0, // 3 slot packets 985 1, // 5 slot packets 986 25, // EDR 2 mpbs 987 26, // EDR 3 mbps 988 39, // 3 slot EDR packts 989 40, // 5 slot EDR packet 990 }; 991 static const uint16_t packet_type_feature_packet_mask[] = { 992 0x0f00, // 3 slot packets 993 0xf000, // 5 slot packets 994 0x1102, // EDR 2 mpbs 995 0x2204, // EDR 3 mbps 996 0x0300, // 3 slot EDR packts 997 0x3000, // 5 slot EDR packet 998 }; 999 1000 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1001 // enable packet types based on size 1002 uint16_t packet_types = 0; 1003 unsigned int i; 1004 for (i=0;i<16;i++){ 1005 if (packet_type_sizes[i] == 0) continue; 1006 if (packet_type_sizes[i] <= buffer_size){ 1007 packet_types |= 1 << i; 1008 } 1009 } 1010 // disable packet types due to missing local supported features 1011 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1012 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1013 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1014 if (feature_set) continue; 1015 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1016 packet_types &= ~packet_type_feature_packet_mask[i]; 1017 } 1018 // flip bits for "may not be used" 1019 packet_types ^= 0x3306; 1020 return packet_types; 1021 } 1022 1023 uint16_t hci_usable_acl_packet_types(void){ 1024 return hci_stack->packet_types; 1025 } 1026 #endif 1027 1028 uint8_t* hci_get_outgoing_packet_buffer(void){ 1029 // hci packet buffer is >= acl data packet length 1030 return hci_stack->hci_packet_buffer; 1031 } 1032 1033 uint16_t hci_max_acl_data_packet_length(void){ 1034 return hci_stack->acl_data_packet_length; 1035 } 1036 1037 #ifdef ENABLE_CLASSIC 1038 int hci_extended_sco_link_supported(void){ 1039 // No. 31, byte 3, bit 7 1040 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1041 } 1042 #endif 1043 1044 int hci_non_flushable_packet_boundary_flag_supported(void){ 1045 // No. 54, byte 6, bit 6 1046 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1047 } 1048 1049 static int gap_ssp_supported(void){ 1050 // No. 51, byte 6, bit 3 1051 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1052 } 1053 1054 static int hci_classic_supported(void){ 1055 #ifdef ENABLE_CLASSIC 1056 // No. 37, byte 4, bit 5, = No BR/EDR Support 1057 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1058 #else 1059 return 0; 1060 #endif 1061 } 1062 1063 static int hci_le_supported(void){ 1064 #ifdef ENABLE_BLE 1065 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1066 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1067 #else 1068 return 0; 1069 #endif 1070 } 1071 1072 #ifdef ENABLE_BLE 1073 1074 /** 1075 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1076 */ 1077 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1078 *addr_type = hci_stack->le_own_addr_type; 1079 if (hci_stack->le_own_addr_type){ 1080 (void)memcpy(addr, hci_stack->le_random_address, 6); 1081 } else { 1082 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1083 } 1084 } 1085 1086 #ifdef ENABLE_LE_CENTRAL 1087 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1088 1089 int offset = 3; 1090 int num_reports = packet[offset]; 1091 offset += 1; 1092 1093 int i; 1094 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1095 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1096 for (i=0; (i<num_reports) && (offset < size);i++){ 1097 // sanity checks on data_length: 1098 uint8_t data_length = packet[offset + 8]; 1099 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1100 if ((offset + 9u + data_length + 1u) > size) return; 1101 // setup event 1102 uint8_t event_size = 10u + data_length; 1103 int pos = 0; 1104 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1105 event[pos++] = event_size; 1106 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1107 offset += 8; 1108 pos += 8; 1109 event[pos++] = packet[offset + 1 + data_length]; // rssi 1110 event[pos++] = data_length; 1111 offset++; 1112 (void)memcpy(&event[pos], &packet[offset], data_length); 1113 pos += data_length; 1114 offset += data_length + 1u; // rssi 1115 hci_emit_event(event, pos, 1); 1116 } 1117 } 1118 #endif 1119 #endif 1120 1121 #ifdef ENABLE_BLE 1122 #ifdef ENABLE_LE_PERIPHERAL 1123 static void hci_update_advertisements_enabled_for_current_roles(void){ 1124 if (hci_stack->le_advertisements_enabled){ 1125 // get number of active le slave connections 1126 int num_slave_connections = 0; 1127 btstack_linked_list_iterator_t it; 1128 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1129 while (btstack_linked_list_iterator_has_next(&it)){ 1130 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1131 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1132 if (con->state != OPEN) continue; 1133 if (con->role != HCI_ROLE_SLAVE) continue; 1134 if (!hci_is_le_connection(con)) continue; 1135 num_slave_connections++; 1136 } 1137 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1138 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1139 } else { 1140 hci_stack->le_advertisements_enabled_for_current_roles = false; 1141 } 1142 } 1143 #endif 1144 #endif 1145 1146 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1147 1148 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1149 if (!hci_stack->config) return 0; 1150 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1151 // Limit baud rate for Broadcom chipsets to 3 mbps 1152 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1153 baud_rate = 3000000; 1154 } 1155 return baud_rate; 1156 } 1157 1158 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1159 UNUSED(ds); 1160 1161 switch (hci_stack->substate){ 1162 case HCI_INIT_W4_SEND_RESET: 1163 log_info("Resend HCI Reset"); 1164 hci_stack->substate = HCI_INIT_SEND_RESET; 1165 hci_stack->num_cmd_packets = 1; 1166 hci_run(); 1167 break; 1168 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1169 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1170 if (hci_stack->hci_transport->reset_link){ 1171 hci_stack->hci_transport->reset_link(); 1172 } 1173 1174 /* fall through */ 1175 1176 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1177 log_info("Resend HCI Reset - CSR Warm Boot"); 1178 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1179 hci_stack->num_cmd_packets = 1; 1180 hci_run(); 1181 break; 1182 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1183 if (hci_stack->hci_transport->set_baudrate){ 1184 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1185 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1186 hci_stack->hci_transport->set_baudrate(baud_rate); 1187 } 1188 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1189 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1190 if (hci_stack->hci_transport->reset_link){ 1191 log_info("Link Reset"); 1192 hci_stack->hci_transport->reset_link(); 1193 } 1194 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1195 hci_run(); 1196 } 1197 break; 1198 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1199 // otherwise continue 1200 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1201 hci_send_cmd(&hci_read_local_supported_commands); 1202 break; 1203 default: 1204 break; 1205 } 1206 } 1207 #endif 1208 1209 static void hci_initializing_next_state(void){ 1210 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1211 } 1212 1213 // assumption: hci_can_send_command_packet_now() == true 1214 static void hci_initializing_run(void){ 1215 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1216 switch (hci_stack->substate){ 1217 case HCI_INIT_SEND_RESET: 1218 hci_state_reset(); 1219 1220 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1221 // prepare reset if command complete not received in 100ms 1222 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1223 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1224 btstack_run_loop_add_timer(&hci_stack->timeout); 1225 #endif 1226 // send command 1227 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1228 hci_send_cmd(&hci_reset); 1229 break; 1230 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1231 hci_send_cmd(&hci_read_local_version_information); 1232 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1233 break; 1234 case HCI_INIT_SEND_READ_LOCAL_NAME: 1235 hci_send_cmd(&hci_read_local_name); 1236 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1237 break; 1238 1239 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1240 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1241 hci_state_reset(); 1242 // prepare reset if command complete not received in 100ms 1243 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1244 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1245 btstack_run_loop_add_timer(&hci_stack->timeout); 1246 // send command 1247 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1248 hci_send_cmd(&hci_reset); 1249 break; 1250 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1251 hci_state_reset(); 1252 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1253 hci_send_cmd(&hci_reset); 1254 break; 1255 case HCI_INIT_SEND_BAUD_CHANGE: { 1256 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1257 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1258 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1259 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1260 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1261 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1262 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1263 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1264 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1265 btstack_run_loop_add_timer(&hci_stack->timeout); 1266 } 1267 break; 1268 } 1269 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1270 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1271 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1272 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1273 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1274 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1275 break; 1276 } 1277 case HCI_INIT_CUSTOM_INIT: 1278 // Custom initialization 1279 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1280 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1281 int send_cmd = 0; 1282 switch (hci_stack->chipset_result){ 1283 case BTSTACK_CHIPSET_VALID_COMMAND: 1284 send_cmd = 1; 1285 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1286 break; 1287 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1288 send_cmd = 1; 1289 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1290 log_info("CSR Warm Boot"); 1291 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1292 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1293 btstack_run_loop_add_timer(&hci_stack->timeout); 1294 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1295 && hci_stack->config 1296 && hci_stack->chipset 1297 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1298 && hci_stack->hci_transport->set_baudrate 1299 && hci_transport_uart_get_main_baud_rate()){ 1300 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1301 } else { 1302 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1303 } 1304 break; 1305 default: 1306 break; 1307 } 1308 1309 if (send_cmd){ 1310 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1311 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1312 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1313 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1314 break; 1315 } 1316 log_info("Init script done"); 1317 1318 // Init script download on Broadcom chipsets causes: 1319 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1320 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1321 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1322 1323 // - baud rate to reset, restore UART baud rate if needed 1324 int need_baud_change = hci_stack->config 1325 && hci_stack->chipset 1326 && hci_stack->chipset->set_baudrate_command 1327 && hci_stack->hci_transport->set_baudrate 1328 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1329 if (need_baud_change) { 1330 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1331 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1332 hci_stack->hci_transport->set_baudrate(baud_rate); 1333 } 1334 1335 uint16_t bcm_delay_ms = 300; 1336 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1337 // -> Work around: wait here. 1338 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1339 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1340 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1341 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1342 btstack_run_loop_add_timer(&hci_stack->timeout); 1343 break; 1344 } 1345 } 1346 // otherwise continue 1347 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1348 hci_send_cmd(&hci_read_local_supported_commands); 1349 break; 1350 case HCI_INIT_SET_BD_ADDR: 1351 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1352 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1353 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1354 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1355 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1356 break; 1357 #endif 1358 1359 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1360 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1361 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1362 hci_send_cmd(&hci_read_local_supported_commands); 1363 break; 1364 case HCI_INIT_READ_BD_ADDR: 1365 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1366 hci_send_cmd(&hci_read_bd_addr); 1367 break; 1368 case HCI_INIT_READ_BUFFER_SIZE: 1369 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1370 hci_send_cmd(&hci_read_buffer_size); 1371 break; 1372 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1373 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1374 hci_send_cmd(&hci_read_local_supported_features); 1375 break; 1376 1377 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1378 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1379 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1380 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1381 break; 1382 case HCI_INIT_HOST_BUFFER_SIZE: 1383 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1384 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1385 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1386 break; 1387 #endif 1388 1389 case HCI_INIT_SET_EVENT_MASK: 1390 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1391 if (hci_le_supported()){ 1392 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1393 } else { 1394 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1395 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1396 } 1397 break; 1398 1399 #ifdef ENABLE_CLASSIC 1400 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1401 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1402 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1403 break; 1404 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1405 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1406 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1407 break; 1408 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1409 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1410 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1411 break; 1412 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1413 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1414 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1415 break; 1416 case HCI_INIT_WRITE_LOCAL_NAME: { 1417 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1418 hci_reserve_packet_buffer(); 1419 uint8_t * packet = hci_stack->hci_packet_buffer; 1420 // construct HCI Command and send 1421 uint16_t opcode = hci_write_local_name.opcode; 1422 hci_stack->last_cmd_opcode = opcode; 1423 packet[0] = opcode & 0xff; 1424 packet[1] = opcode >> 8; 1425 packet[2] = DEVICE_NAME_LEN; 1426 memset(&packet[3], 0, DEVICE_NAME_LEN); 1427 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1428 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1429 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1430 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1431 // expand '00:00:00:00:00:00' in name with bd_addr 1432 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1433 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1434 break; 1435 } 1436 case HCI_INIT_WRITE_EIR_DATA: { 1437 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1438 hci_reserve_packet_buffer(); 1439 uint8_t * packet = hci_stack->hci_packet_buffer; 1440 // construct HCI Command in-place and send 1441 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1442 hci_stack->last_cmd_opcode = opcode; 1443 uint16_t offset = 0; 1444 packet[offset++] = opcode & 0xff; 1445 packet[offset++] = opcode >> 8; 1446 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1447 packet[offset++] = 0; // FEC not required 1448 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1449 if (hci_stack->eir_data){ 1450 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1451 ad_context_t context; 1452 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1453 uint8_t data_type = ad_iterator_get_data_type(&context); 1454 uint8_t size = ad_iterator_get_data_len(&context); 1455 const uint8_t *data = ad_iterator_get_data(&context); 1456 // copy item 1457 packet[offset++] = size + 1; 1458 packet[offset++] = data_type; 1459 memcpy(&packet[offset], data, size); 1460 // update name item 1461 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1462 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1463 } 1464 offset += size; 1465 } 1466 } else { 1467 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1468 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1469 packet[offset++] = bytes_to_copy + 1; 1470 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1471 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1472 // expand '00:00:00:00:00:00' in name with bd_addr 1473 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1474 } 1475 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1476 break; 1477 } 1478 case HCI_INIT_WRITE_INQUIRY_MODE: 1479 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1480 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1481 break; 1482 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1483 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1484 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1485 break; 1486 case HCI_INIT_WRITE_SCAN_ENABLE: 1487 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1488 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1489 break; 1490 // only sent if ENABLE_SCO_OVER_HCI is defined 1491 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1492 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1493 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1494 break; 1495 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1496 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1497 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1498 break; 1499 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1500 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1501 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1502 log_info("BCM: Route SCO data via HCI transport"); 1503 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1504 break; 1505 1506 #endif 1507 #ifdef ENABLE_BLE 1508 // LE INIT 1509 case HCI_INIT_LE_READ_BUFFER_SIZE: 1510 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1511 hci_send_cmd(&hci_le_read_buffer_size); 1512 break; 1513 case HCI_INIT_LE_SET_EVENT_MASK: 1514 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1515 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1516 break; 1517 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1518 // LE Supported Host = 1, Simultaneous Host = 0 1519 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1520 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1521 break; 1522 #endif 1523 1524 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1525 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1526 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1527 hci_send_cmd(&hci_le_read_maximum_data_length); 1528 break; 1529 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1530 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1531 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1532 break; 1533 #endif 1534 1535 #ifdef ENABLE_LE_CENTRAL 1536 case HCI_INIT_READ_WHITE_LIST_SIZE: 1537 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1538 hci_send_cmd(&hci_le_read_white_list_size); 1539 break; 1540 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1541 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1542 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); 1543 break; 1544 #endif 1545 default: 1546 return; 1547 } 1548 } 1549 1550 static void hci_init_done(void){ 1551 // done. tell the app 1552 log_info("hci_init_done -> HCI_STATE_WORKING"); 1553 hci_stack->state = HCI_STATE_WORKING; 1554 hci_emit_state(); 1555 hci_run(); 1556 } 1557 1558 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1559 bool command_completed = false; 1560 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1561 uint16_t opcode = little_endian_read_16(packet,3); 1562 if (opcode == hci_stack->last_cmd_opcode){ 1563 command_completed = true; 1564 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1565 } else { 1566 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1567 } 1568 } 1569 1570 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1571 uint8_t status = packet[2]; 1572 uint16_t opcode = little_endian_read_16(packet,4); 1573 if (opcode == hci_stack->last_cmd_opcode){ 1574 if (status){ 1575 command_completed = true; 1576 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1577 } else { 1578 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1579 } 1580 } else { 1581 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1582 } 1583 } 1584 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1585 // Vendor == CSR 1586 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1587 // TODO: track actual command 1588 command_completed = true; 1589 } 1590 1591 // Vendor == Toshiba 1592 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1593 // TODO: track actual command 1594 command_completed = true; 1595 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1596 hci_stack->num_cmd_packets = 1; 1597 } 1598 #endif 1599 1600 return command_completed; 1601 } 1602 1603 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1604 1605 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1606 1607 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1608 1609 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1610 1611 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1612 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1613 // 1614 // HCI Reset 1615 // Timeout 100 ms 1616 // HCI Reset 1617 // Command Complete Reset 1618 // HCI Read Local Version Information 1619 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1620 // hang... 1621 // 1622 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1623 if (!command_completed 1624 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1625 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1626 1627 uint16_t opcode = little_endian_read_16(packet,3); 1628 if (opcode == hci_reset.opcode){ 1629 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1630 return; 1631 } 1632 } 1633 1634 // CSR & H5 1635 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1636 if (!command_completed 1637 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1638 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1639 1640 uint16_t opcode = little_endian_read_16(packet,3); 1641 if (opcode == hci_reset.opcode){ 1642 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1643 return; 1644 } 1645 } 1646 1647 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1648 // fix: Correct substate and behave as command below 1649 if (command_completed){ 1650 switch (hci_stack->substate){ 1651 case HCI_INIT_SEND_RESET: 1652 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1653 break; 1654 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1655 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1656 break; 1657 default: 1658 break; 1659 } 1660 } 1661 1662 #endif 1663 1664 if (!command_completed) return; 1665 1666 bool need_baud_change = false; 1667 bool need_addr_change = false; 1668 1669 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1670 need_baud_change = hci_stack->config 1671 && hci_stack->chipset 1672 && hci_stack->chipset->set_baudrate_command 1673 && hci_stack->hci_transport->set_baudrate 1674 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1675 1676 need_addr_change = hci_stack->custom_bd_addr_set 1677 && hci_stack->chipset 1678 && hci_stack->chipset->set_bd_addr_command; 1679 #endif 1680 1681 switch(hci_stack->substate){ 1682 1683 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1684 case HCI_INIT_SEND_RESET: 1685 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1686 // fix: just correct substate and behave as command below 1687 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1688 btstack_run_loop_remove_timer(&hci_stack->timeout); 1689 break; 1690 case HCI_INIT_W4_SEND_RESET: 1691 btstack_run_loop_remove_timer(&hci_stack->timeout); 1692 break; 1693 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1694 log_info("Received local name, need baud change %d", (int) need_baud_change); 1695 if (need_baud_change){ 1696 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1697 return; 1698 } 1699 // skip baud change 1700 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1701 return; 1702 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1703 // for STLC2500D, baud rate change already happened. 1704 // for others, baud rate gets changed now 1705 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1706 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1707 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1708 hci_stack->hci_transport->set_baudrate(baud_rate); 1709 } 1710 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1711 return; 1712 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1713 btstack_run_loop_remove_timer(&hci_stack->timeout); 1714 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1715 return; 1716 case HCI_INIT_W4_CUSTOM_INIT: 1717 // repeat custom init 1718 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1719 return; 1720 #else 1721 case HCI_INIT_W4_SEND_RESET: 1722 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1723 return ; 1724 #endif 1725 1726 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1727 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1728 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1729 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1730 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1731 return; 1732 } 1733 if (need_addr_change){ 1734 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1735 return; 1736 } 1737 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1738 return; 1739 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1740 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1741 if (need_baud_change){ 1742 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1743 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1744 hci_stack->hci_transport->set_baudrate(baud_rate); 1745 } 1746 if (need_addr_change){ 1747 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1748 return; 1749 } 1750 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1751 return; 1752 case HCI_INIT_W4_SET_BD_ADDR: 1753 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1754 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1755 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1756 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1757 return; 1758 } 1759 // skipping st warm boot 1760 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1761 return; 1762 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1763 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1764 return; 1765 #endif 1766 case HCI_INIT_W4_READ_BD_ADDR: 1767 // only read buffer size if supported 1768 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1769 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1770 return; 1771 } 1772 // skipping read buffer size 1773 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1774 return; 1775 case HCI_INIT_W4_SET_EVENT_MASK: 1776 // skip Classic init commands for LE only chipsets 1777 if (!hci_classic_supported()){ 1778 #ifdef ENABLE_BLE 1779 if (hci_le_supported()){ 1780 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1781 return; 1782 } 1783 #endif 1784 log_error("Neither BR/EDR nor LE supported"); 1785 hci_init_done(); 1786 return; 1787 } 1788 if (!gap_ssp_supported()){ 1789 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1790 return; 1791 } 1792 break; 1793 #ifdef ENABLE_BLE 1794 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1795 // skip write le host if not supported (e.g. on LE only EM9301) 1796 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1797 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1798 return; 1799 1800 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1801 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1802 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1803 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1804 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1805 return; 1806 } 1807 // explicit fall through to reduce repetitions 1808 1809 #ifdef ENABLE_LE_CENTRAL 1810 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1811 #else 1812 hci_init_done(); 1813 #endif 1814 return; 1815 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1816 1817 #endif /* ENABLE_BLE */ 1818 1819 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1820 // skip write secure connections host support if not supported or disabled 1821 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1822 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1823 return; 1824 } 1825 break; 1826 1827 #ifdef ENABLE_SCO_OVER_HCI 1828 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1829 // skip write synchronous flow control if not supported 1830 if (hci_stack->local_supported_commands[0] & 0x04) break; 1831 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1832 1833 /* fall through */ 1834 1835 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1836 // skip write default erroneous data reporting if not supported 1837 if (hci_stack->local_supported_commands[0] & 0x08) break; 1838 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1839 1840 /* fall through */ 1841 1842 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1843 // skip bcm set sco pcm config on non-Broadcom chipsets 1844 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1845 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1846 1847 /* fall through */ 1848 1849 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1850 if (!hci_le_supported()){ 1851 // SKIP LE init for Classic only configuration 1852 hci_init_done(); 1853 return; 1854 } 1855 break; 1856 1857 #else /* !ENABLE_SCO_OVER_HCI */ 1858 1859 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1860 #ifdef ENABLE_BLE 1861 if (hci_le_supported()){ 1862 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1863 return; 1864 } 1865 #endif 1866 // SKIP LE init for Classic only configuration 1867 hci_init_done(); 1868 return; 1869 #endif /* ENABLE_SCO_OVER_HCI */ 1870 1871 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1872 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1873 // Response to command before init done state -> init done 1874 case (HCI_INIT_DONE-1): 1875 hci_init_done(); 1876 return; 1877 #endif 1878 1879 default: 1880 break; 1881 } 1882 hci_initializing_next_state(); 1883 } 1884 1885 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1886 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1887 bd_addr_t bd_address; 1888 (void)memcpy(&bd_address, conn->address, 6); 1889 1890 #ifdef ENABLE_CLASSIC 1891 // cache needed data 1892 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1893 #endif 1894 1895 // connection failed, remove entry 1896 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1897 btstack_memory_hci_connection_free( conn ); 1898 1899 #ifdef ENABLE_CLASSIC 1900 // notify client if dedicated bonding 1901 if (notify_dedicated_bonding_failed){ 1902 log_info("hci notify_dedicated_bonding_failed"); 1903 hci_emit_dedicated_bonding_result(bd_address, status); 1904 } 1905 1906 // if authentication error, also delete link key 1907 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1908 gap_drop_link_key_for_bd_addr(bd_address); 1909 } 1910 #else 1911 UNUSED(status); 1912 #endif 1913 } 1914 1915 #ifdef ENABLE_CLASSIC 1916 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1917 // SSP Controller 1918 if (features[6] & (1 << 3)){ 1919 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1920 } 1921 // eSCO 1922 if (features[3] & (1<<7)){ 1923 conn->remote_supported_features[0] |= 1; 1924 } 1925 // Extended features 1926 if (features[7] & (1<<7)){ 1927 conn->remote_supported_features[0] |= 2; 1928 } 1929 } 1930 1931 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1932 // SSP Host 1933 if (features[0] & (1 << 0)){ 1934 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1935 } 1936 // SC Host 1937 if (features[0] & (1 << 3)){ 1938 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1939 } 1940 } 1941 1942 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1943 // SC Controller 1944 if (features[1] & (1 << 0)){ 1945 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1946 } 1947 } 1948 1949 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1950 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1951 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1952 if (conn->bonding_flags & BONDING_DEDICATED){ 1953 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1954 } 1955 } 1956 #endif 1957 1958 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1959 // handle BT initialization 1960 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1961 hci_initializing_event_handler(packet, size); 1962 } 1963 1964 // help with BT sleep 1965 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1966 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1967 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1968 hci_initializing_next_state(); 1969 } 1970 } 1971 1972 #ifdef ENABLE_CLASSIC 1973 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1974 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1975 conn->encryption_key_size = encryption_key_size; 1976 1977 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1978 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1979 return; 1980 } 1981 1982 // Request Authentication if not already done 1983 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1984 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1985 } 1986 #endif 1987 1988 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1989 UNUSED(size); 1990 1991 uint16_t manufacturer; 1992 #ifdef ENABLE_CLASSIC 1993 hci_con_handle_t handle; 1994 hci_connection_t * conn; 1995 uint8_t status; 1996 #endif 1997 // get num cmd packets - limit to 1 to reduce complexity 1998 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1999 2000 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2001 switch (opcode){ 2002 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2003 if (packet[5]) break; 2004 // terminate, name 248 chars 2005 packet[6+248] = 0; 2006 log_info("local name: %s", &packet[6]); 2007 break; 2008 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2009 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2010 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2011 uint16_t acl_len = little_endian_read_16(packet, 6); 2012 uint16_t sco_len = packet[8]; 2013 2014 // determine usable ACL/SCO payload size 2015 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2016 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2017 2018 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2019 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2020 2021 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2022 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2023 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2024 } 2025 break; 2026 case HCI_OPCODE_HCI_READ_RSSI: 2027 if (packet[5] == ERROR_CODE_SUCCESS){ 2028 uint8_t event[5]; 2029 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2030 event[1] = 3; 2031 (void)memcpy(&event[2], &packet[6], 3); 2032 hci_emit_event(event, sizeof(event), 1); 2033 } 2034 break; 2035 #ifdef ENABLE_BLE 2036 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2037 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2038 hci_stack->le_acl_packets_total_num = packet[8]; 2039 // determine usable ACL payload size 2040 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2041 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2042 } 2043 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2044 break; 2045 #endif 2046 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2047 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2048 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2049 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2050 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); 2051 break; 2052 #endif 2053 #ifdef ENABLE_LE_CENTRAL 2054 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2055 hci_stack->le_whitelist_capacity = packet[6]; 2056 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2057 break; 2058 #endif 2059 case HCI_OPCODE_HCI_READ_BD_ADDR: 2060 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2061 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)); 2062 #ifdef ENABLE_CLASSIC 2063 if (hci_stack->link_key_db){ 2064 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2065 } 2066 #endif 2067 break; 2068 #ifdef ENABLE_CLASSIC 2069 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2070 hci_emit_discoverable_enabled(hci_stack->discoverable); 2071 break; 2072 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2073 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2074 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2075 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2076 hci_emit_event(event, sizeof(event), 1); 2077 } 2078 break; 2079 #endif 2080 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2081 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2082 2083 #ifdef ENABLE_CLASSIC 2084 // determine usable ACL packet types based on host buffer size and supported features 2085 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2086 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2087 #endif 2088 // Classic/LE 2089 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2090 break; 2091 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2092 manufacturer = little_endian_read_16(packet, 10); 2093 // map Cypress to Broadcom 2094 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2095 log_info("Treat Cypress as Broadcom"); 2096 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2097 little_endian_store_16(packet, 10, manufacturer); 2098 } 2099 hci_stack->manufacturer = manufacturer; 2100 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2101 break; 2102 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2103 hci_stack->local_supported_commands[0] = 2104 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2105 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2106 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2110 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2111 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2112 hci_stack->local_supported_commands[1] = 2113 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2114 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2115 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2116 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2117 break; 2118 #ifdef ENABLE_CLASSIC 2119 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2120 if (packet[5]) return; 2121 hci_stack->synchronous_flow_control_enabled = 1; 2122 break; 2123 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2124 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2125 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2126 conn = hci_connection_for_handle(handle); 2127 if (conn != NULL) { 2128 uint8_t key_size = 0; 2129 if (status == 0){ 2130 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2131 log_info("Handle %04x key Size: %u", handle, key_size); 2132 } else { 2133 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2134 } 2135 hci_handle_read_encryption_key_size_complete(conn, key_size); 2136 } 2137 break; 2138 #endif 2139 default: 2140 break; 2141 } 2142 } 2143 2144 #ifdef ENABLE_BLE 2145 static void event_handle_le_connection_complete(const uint8_t * packet){ 2146 bd_addr_t addr; 2147 bd_addr_type_t addr_type; 2148 hci_connection_t * conn; 2149 2150 // Connection management 2151 reverse_bd_addr(&packet[8], addr); 2152 addr_type = (bd_addr_type_t)packet[7]; 2153 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2154 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2155 2156 #ifdef ENABLE_LE_CENTRAL 2157 // handle error: error is reported only to the initiator -> outgoing connection 2158 if (packet[3]){ 2159 2160 // handle cancelled outgoing connection 2161 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2162 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2163 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2164 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2165 // whitelist connect 2166 if (hci_is_le_connection_type(addr_type)){ 2167 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2168 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2169 } 2170 // get outgoing connection conn struct for direct connect 2171 conn = gap_get_outgoing_connection(); 2172 } 2173 2174 // outgoing le connection establishment is done 2175 if (conn){ 2176 // remove entry 2177 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2178 btstack_memory_hci_connection_free( conn ); 2179 } 2180 return; 2181 } 2182 #endif 2183 2184 // on success, both hosts receive connection complete event 2185 if (packet[6] == HCI_ROLE_MASTER){ 2186 #ifdef ENABLE_LE_CENTRAL 2187 // if we're master on an le connection, it was an outgoing connection and we're done with it 2188 // note: no hci_connection_t object exists yet for connect with whitelist 2189 if (hci_is_le_connection_type(addr_type)){ 2190 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2191 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2192 } 2193 #endif 2194 } else { 2195 #ifdef ENABLE_LE_PERIPHERAL 2196 // if we're slave, it was an incoming connection, advertisements have stopped 2197 hci_stack->le_advertisements_active = false; 2198 #endif 2199 } 2200 2201 // LE connections are auto-accepted, so just create a connection if there isn't one already 2202 if (!conn){ 2203 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2204 } 2205 2206 // no memory, sorry. 2207 if (!conn){ 2208 return; 2209 } 2210 2211 conn->state = OPEN; 2212 conn->role = packet[6]; 2213 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2214 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2215 2216 #ifdef ENABLE_LE_PERIPHERAL 2217 if (packet[6] == HCI_ROLE_SLAVE){ 2218 hci_update_advertisements_enabled_for_current_roles(); 2219 } 2220 #endif 2221 2222 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2223 2224 // restart timer 2225 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2226 // btstack_run_loop_add_timer(&conn->timeout); 2227 2228 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2229 2230 hci_emit_nr_connections_changed(); 2231 } 2232 #endif 2233 2234 static void event_handler(uint8_t *packet, uint16_t size){ 2235 2236 uint16_t event_length = packet[1]; 2237 2238 // assert packet is complete 2239 if (size != (event_length + 2u)){ 2240 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2241 return; 2242 } 2243 2244 bd_addr_t addr; 2245 bd_addr_type_t addr_type; 2246 hci_con_handle_t handle; 2247 hci_connection_t * conn; 2248 int i; 2249 int create_connection_cmd; 2250 2251 #ifdef ENABLE_CLASSIC 2252 uint8_t link_type; 2253 #endif 2254 2255 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2256 2257 switch (hci_event_packet_get_type(packet)) { 2258 2259 case HCI_EVENT_COMMAND_COMPLETE: 2260 handle_command_complete_event(packet, size); 2261 break; 2262 2263 case HCI_EVENT_COMMAND_STATUS: 2264 // get num cmd packets - limit to 1 to reduce complexity 2265 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2266 2267 // check command status to detected failed outgoing connections 2268 create_connection_cmd = 0; 2269 #ifdef ENABLE_CLASSIC 2270 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2271 create_connection_cmd = 1; 2272 } 2273 #endif 2274 #ifdef ENABLE_LE_CENTRAL 2275 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2276 create_connection_cmd = 1; 2277 } 2278 #endif 2279 if (create_connection_cmd) { 2280 uint8_t status = hci_event_command_status_get_status(packet); 2281 addr_type = hci_stack->outgoing_addr_type; 2282 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2283 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); 2284 2285 // reset outgoing address info 2286 memset(hci_stack->outgoing_addr, 0, 6); 2287 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2288 2289 // on error 2290 if (status != ERROR_CODE_SUCCESS){ 2291 #ifdef ENABLE_LE_CENTRAL 2292 if (hci_is_le_connection_type(addr_type)){ 2293 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2294 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2295 } 2296 #endif 2297 // error => outgoing connection failed 2298 if (conn != NULL){ 2299 hci_handle_connection_failed(conn, status); 2300 } 2301 } 2302 } 2303 break; 2304 2305 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2306 if (size < 3) return; 2307 uint16_t num_handles = packet[2]; 2308 if (size != (3u + num_handles * 4u)) return; 2309 uint16_t offset = 3; 2310 for (i=0; i<num_handles;i++){ 2311 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2312 offset += 2u; 2313 uint16_t num_packets = little_endian_read_16(packet, offset); 2314 offset += 2u; 2315 2316 conn = hci_connection_for_handle(handle); 2317 if (!conn){ 2318 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2319 continue; 2320 } 2321 2322 if (conn->num_packets_sent >= num_packets){ 2323 conn->num_packets_sent -= num_packets; 2324 } else { 2325 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2326 conn->num_packets_sent = 0; 2327 } 2328 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2329 2330 #ifdef ENABLE_CLASSIC 2331 // For SCO, we do the can_send_now_check here 2332 hci_notify_if_sco_can_send_now(); 2333 #endif 2334 } 2335 break; 2336 } 2337 2338 #ifdef ENABLE_CLASSIC 2339 case HCI_EVENT_INQUIRY_COMPLETE: 2340 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2341 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2342 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2343 hci_emit_event(event, sizeof(event), 1); 2344 } 2345 break; 2346 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2347 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2348 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2349 } 2350 break; 2351 case HCI_EVENT_CONNECTION_REQUEST: 2352 reverse_bd_addr(&packet[2], addr); 2353 if (hci_stack->gap_classic_accept_callback != NULL){ 2354 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2355 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2356 bd_addr_copy(hci_stack->decline_addr, addr); 2357 break; 2358 } 2359 } 2360 2361 // TODO: eval COD 8-10 2362 link_type = packet[11]; 2363 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2364 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2365 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2366 if (!conn) { 2367 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2368 } 2369 if (!conn) { 2370 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2371 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2372 bd_addr_copy(hci_stack->decline_addr, addr); 2373 break; 2374 } 2375 conn->role = HCI_ROLE_SLAVE; 2376 conn->state = RECEIVED_CONNECTION_REQUEST; 2377 // store info about eSCO 2378 if (link_type == 0x02){ 2379 conn->remote_supported_features[0] |= 1; 2380 } 2381 hci_run(); 2382 break; 2383 2384 case HCI_EVENT_CONNECTION_COMPLETE: 2385 // Connection management 2386 reverse_bd_addr(&packet[5], addr); 2387 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2388 addr_type = BD_ADDR_TYPE_ACL; 2389 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2390 if (conn) { 2391 if (!packet[2]){ 2392 conn->state = OPEN; 2393 conn->con_handle = little_endian_read_16(packet, 3); 2394 2395 // queue get remote feature 2396 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2397 2398 // queue set supervision timeout if we're master 2399 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2400 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2401 } 2402 2403 // restart timer 2404 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2405 btstack_run_loop_add_timer(&conn->timeout); 2406 2407 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2408 2409 hci_emit_nr_connections_changed(); 2410 } else { 2411 // connection failed 2412 hci_handle_connection_failed(conn, packet[2]); 2413 } 2414 } 2415 break; 2416 2417 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2418 reverse_bd_addr(&packet[5], addr); 2419 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2420 if (packet[2]){ 2421 // connection failed 2422 break; 2423 } 2424 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2425 if (!conn) { 2426 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2427 } 2428 if (!conn) { 2429 break; 2430 } 2431 conn->state = OPEN; 2432 conn->con_handle = little_endian_read_16(packet, 3); 2433 2434 #ifdef ENABLE_SCO_OVER_HCI 2435 // update SCO 2436 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2437 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2438 } 2439 // trigger can send now 2440 if (hci_have_usb_transport()){ 2441 hci_stack->sco_can_send_now = 1; 2442 } 2443 #endif 2444 break; 2445 2446 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2447 handle = little_endian_read_16(packet, 3); 2448 conn = hci_connection_for_handle(handle); 2449 if (!conn) break; 2450 if (!packet[2]){ 2451 const uint8_t * features = &packet[5]; 2452 hci_handle_remote_features_page_0(conn, features); 2453 2454 // read extended features if possible 2455 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2456 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2457 break; 2458 } 2459 } 2460 hci_handle_remote_features_received(conn); 2461 break; 2462 2463 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2464 handle = little_endian_read_16(packet, 3); 2465 conn = hci_connection_for_handle(handle); 2466 if (!conn) break; 2467 // status = ok, page = 1 2468 if (!packet[2]) { 2469 uint8_t page_number = packet[5]; 2470 uint8_t maximum_page_number = packet[6]; 2471 const uint8_t * features = &packet[7]; 2472 bool done = false; 2473 switch (page_number){ 2474 case 1: 2475 hci_handle_remote_features_page_1(conn, features); 2476 if (maximum_page_number >= 2){ 2477 // get Secure Connections (Controller) from Page 2 if available 2478 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2479 } else { 2480 // otherwise, assume SC (Controller) == SC (Host) 2481 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2482 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2483 } 2484 done = true; 2485 } 2486 break; 2487 case 2: 2488 hci_handle_remote_features_page_2(conn, features); 2489 done = true; 2490 break; 2491 default: 2492 break; 2493 } 2494 if (!done) break; 2495 } 2496 hci_handle_remote_features_received(conn); 2497 break; 2498 2499 case HCI_EVENT_LINK_KEY_REQUEST: 2500 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2501 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2502 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2503 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2504 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2505 hci_run(); 2506 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2507 return; 2508 2509 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2510 reverse_bd_addr(&packet[2], addr); 2511 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2512 if (!conn) break; 2513 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2514 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2515 // Change Connection Encryption keeps link key type 2516 if (link_key_type != CHANGED_COMBINATION_KEY){ 2517 conn->link_key_type = link_key_type; 2518 } 2519 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2520 // still forward event to allow dismiss of pairing dialog 2521 break; 2522 } 2523 2524 case HCI_EVENT_PIN_CODE_REQUEST: 2525 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2526 // non-bondable mode: pin code negative reply will be sent 2527 if (!hci_stack->bondable){ 2528 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2529 hci_run(); 2530 return; 2531 } 2532 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2533 if (!hci_stack->link_key_db) break; 2534 hci_event_pin_code_request_get_bd_addr(packet, addr); 2535 hci_stack->link_key_db->delete_link_key(addr); 2536 break; 2537 2538 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2539 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2540 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2541 break; 2542 2543 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2544 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2545 if (!hci_stack->ssp_auto_accept) break; 2546 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2547 break; 2548 2549 case HCI_EVENT_USER_PASSKEY_REQUEST: 2550 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2551 if (!hci_stack->ssp_auto_accept) break; 2552 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2553 break; 2554 case HCI_EVENT_MODE_CHANGE: 2555 handle = hci_event_mode_change_get_handle(packet); 2556 conn = hci_connection_for_handle(handle); 2557 if (!conn) break; 2558 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2559 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2560 break; 2561 #endif 2562 2563 case HCI_EVENT_ENCRYPTION_CHANGE: 2564 handle = hci_event_encryption_change_get_connection_handle(packet); 2565 conn = hci_connection_for_handle(handle); 2566 if (!conn) break; 2567 if (hci_event_encryption_change_get_status(packet) == 0u) { 2568 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2569 if (encryption_enabled){ 2570 if (hci_is_le_connection(conn)){ 2571 // For LE, we accept connection as encrypted 2572 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2573 } 2574 #ifdef ENABLE_CLASSIC 2575 else { 2576 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2577 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2578 bool connected_uses_aes_ccm = encryption_enabled == 2; 2579 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2580 log_info("SC during pairing, but only E0 now -> abort"); 2581 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2582 break; 2583 } 2584 2585 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2586 if (connected_uses_aes_ccm){ 2587 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2588 } 2589 2590 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2591 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2592 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2593 } else { 2594 // if not, pretend everything is perfect 2595 hci_handle_read_encryption_key_size_complete(conn, 16); 2596 } 2597 } 2598 #endif 2599 } else { 2600 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2601 } 2602 } 2603 2604 break; 2605 2606 #ifdef ENABLE_CLASSIC 2607 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2608 handle = hci_event_authentication_complete_get_connection_handle(packet); 2609 conn = hci_connection_for_handle(handle); 2610 if (!conn) break; 2611 2612 // ignore authentication event if we didn't request it 2613 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2614 2615 // dedicated bonding: send result and disconnect 2616 if (conn->bonding_flags & BONDING_DEDICATED){ 2617 conn->bonding_flags &= ~BONDING_DEDICATED; 2618 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2619 conn->bonding_status = packet[2]; 2620 break; 2621 } 2622 2623 // authenticated only if auth status == 0 2624 if (hci_event_authentication_complete_get_status(packet) == 0){ 2625 // authenticated 2626 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2627 2628 // If link key sufficient for requested security and not already encrypted, start encryption 2629 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2630 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2631 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2632 break; 2633 } 2634 } 2635 2636 // emit updated security level 2637 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2638 break; 2639 #endif 2640 2641 // HCI_EVENT_DISCONNECTION_COMPLETE 2642 // has been split, to first notify stack before shutting connection down 2643 // see end of function, too. 2644 case HCI_EVENT_DISCONNECTION_COMPLETE: 2645 if (packet[2]) break; // status != 0 2646 handle = little_endian_read_16(packet, 3); 2647 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2648 if (hci_stack->acl_fragmentation_total_size > 0u) { 2649 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2650 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2651 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2652 hci_stack->acl_fragmentation_total_size = 0; 2653 hci_stack->acl_fragmentation_pos = 0; 2654 if (release_buffer){ 2655 hci_release_packet_buffer(); 2656 } 2657 } 2658 } 2659 2660 conn = hci_connection_for_handle(handle); 2661 if (!conn) break; 2662 // mark connection for shutdown 2663 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2664 2665 // emit dedicatd bonding event 2666 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2667 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2668 } 2669 2670 #ifdef ENABLE_BLE 2671 #ifdef ENABLE_LE_PERIPHERAL 2672 // re-enable advertisements for le connections if active 2673 if (hci_is_le_connection(conn)){ 2674 hci_update_advertisements_enabled_for_current_roles(); 2675 } 2676 #endif 2677 #endif 2678 break; 2679 2680 case HCI_EVENT_HARDWARE_ERROR: 2681 log_error("Hardware Error: 0x%02x", packet[2]); 2682 if (hci_stack->hardware_error_callback){ 2683 (*hci_stack->hardware_error_callback)(packet[2]); 2684 } else { 2685 // if no special requests, just reboot stack 2686 hci_power_control_off(); 2687 hci_power_control_on(); 2688 } 2689 break; 2690 2691 #ifdef ENABLE_CLASSIC 2692 case HCI_EVENT_ROLE_CHANGE: 2693 if (packet[2]) break; // status != 0 2694 reverse_bd_addr(&packet[3], addr); 2695 addr_type = BD_ADDR_TYPE_ACL; 2696 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2697 if (!conn) break; 2698 conn->role = packet[9]; 2699 break; 2700 #endif 2701 2702 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2703 // release packet buffer only for asynchronous transport and if there are not further fragements 2704 if (hci_transport_synchronous()) { 2705 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2706 return; // instead of break: to avoid re-entering hci_run() 2707 } 2708 hci_stack->acl_fragmentation_tx_active = 0; 2709 if (hci_stack->acl_fragmentation_total_size) break; 2710 hci_release_packet_buffer(); 2711 2712 // L2CAP receives this event via the hci_emit_event below 2713 2714 #ifdef ENABLE_CLASSIC 2715 // For SCO, we do the can_send_now_check here 2716 hci_notify_if_sco_can_send_now(); 2717 #endif 2718 break; 2719 2720 #ifdef ENABLE_CLASSIC 2721 case HCI_EVENT_SCO_CAN_SEND_NOW: 2722 // For SCO, we do the can_send_now_check here 2723 hci_stack->sco_can_send_now = 1; 2724 hci_notify_if_sco_can_send_now(); 2725 return; 2726 2727 // explode inquriy results for easier consumption 2728 case HCI_EVENT_INQUIRY_RESULT: 2729 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2730 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2731 gap_inquiry_explode(packet, size); 2732 break; 2733 #endif 2734 2735 #ifdef ENABLE_BLE 2736 case HCI_EVENT_LE_META: 2737 switch (packet[2]){ 2738 #ifdef ENABLE_LE_CENTRAL 2739 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2740 // log_info("advertising report received"); 2741 if (!hci_stack->le_scanning_enabled) break; 2742 le_handle_advertisement_report(packet, size); 2743 break; 2744 #endif 2745 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2746 event_handle_le_connection_complete(packet); 2747 break; 2748 2749 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2750 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2751 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2752 conn = hci_connection_for_handle(handle); 2753 if (!conn) break; 2754 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2755 break; 2756 2757 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2758 // connection 2759 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2760 conn = hci_connection_for_handle(handle); 2761 if (conn) { 2762 // read arguments 2763 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2764 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2765 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2766 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2767 2768 // validate against current connection parameter range 2769 le_connection_parameter_range_t existing_range; 2770 gap_get_connection_parameter_range(&existing_range); 2771 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2772 if (update_parameter){ 2773 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2774 conn->le_conn_interval_min = le_conn_interval_min; 2775 conn->le_conn_interval_max = le_conn_interval_max; 2776 conn->le_conn_latency = le_conn_latency; 2777 conn->le_supervision_timeout = le_supervision_timeout; 2778 } else { 2779 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2780 } 2781 } 2782 break; 2783 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2784 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2785 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2786 conn = hci_connection_for_handle(handle); 2787 if (conn) { 2788 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2789 } 2790 break; 2791 #endif 2792 default: 2793 break; 2794 } 2795 break; 2796 #endif 2797 case HCI_EVENT_VENDOR_SPECIFIC: 2798 // Vendor specific commands often create vendor specific event instead of num completed packets 2799 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2800 switch (hci_stack->manufacturer){ 2801 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2802 hci_stack->num_cmd_packets = 1; 2803 break; 2804 default: 2805 break; 2806 } 2807 break; 2808 default: 2809 break; 2810 } 2811 2812 handle_event_for_current_stack_state(packet, size); 2813 2814 // notify upper stack 2815 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2816 2817 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2818 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2819 handle = little_endian_read_16(packet, 3); 2820 hci_connection_t * aConn = hci_connection_for_handle(handle); 2821 // discard connection if app did not trigger a reconnect in the event handler 2822 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2823 hci_shutdown_connection(aConn); 2824 } 2825 } 2826 2827 // execute main loop 2828 hci_run(); 2829 } 2830 2831 #ifdef ENABLE_CLASSIC 2832 2833 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2834 static void sco_schedule_tx(hci_connection_t * conn); 2835 2836 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2837 log_debug("SCO TX Timeout"); 2838 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2839 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2840 if (!conn) return; 2841 2842 // trigger send 2843 conn->sco_tx_ready = 1; 2844 // extra packet if CVSD but SCO buffer is too short 2845 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2846 conn->sco_tx_ready++; 2847 } 2848 hci_notify_if_sco_can_send_now(); 2849 } 2850 2851 2852 #define SCO_TX_AFTER_RX_MS (6) 2853 2854 static void sco_schedule_tx(hci_connection_t * conn){ 2855 2856 uint32_t now = btstack_run_loop_get_time_ms(); 2857 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2858 int time_delta_ms = sco_tx_ms - now; 2859 2860 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2861 2862 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2863 btstack_run_loop_set_timer(timer, time_delta_ms); 2864 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2865 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2866 btstack_run_loop_add_timer(timer); 2867 } 2868 2869 static void sco_handler(uint8_t * packet, uint16_t size){ 2870 // lookup connection struct 2871 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2872 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2873 if (!conn) return; 2874 2875 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2876 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2877 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2878 packet[2] = 0x3c; 2879 memmove(&packet[3], &packet[23], 63); 2880 size = 63; 2881 } 2882 } 2883 2884 if (hci_have_usb_transport()){ 2885 // Nothing to do 2886 } else { 2887 // 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); 2888 if (hci_stack->synchronous_flow_control_enabled == 0){ 2889 uint32_t now = btstack_run_loop_get_time_ms(); 2890 2891 if (!conn->sco_rx_valid){ 2892 // ignore first 10 packets 2893 conn->sco_rx_count++; 2894 // log_debug("sco rx count %u", conn->sco_rx_count); 2895 if (conn->sco_rx_count == 10) { 2896 // use first timestamp as is and pretent it just started 2897 conn->sco_rx_ms = now; 2898 conn->sco_rx_valid = 1; 2899 conn->sco_rx_count = 0; 2900 sco_schedule_tx(conn); 2901 } 2902 } else { 2903 // track expected arrival timme 2904 conn->sco_rx_count++; 2905 conn->sco_rx_ms += 7; 2906 int delta = (int32_t) (now - conn->sco_rx_ms); 2907 if (delta > 0){ 2908 conn->sco_rx_ms++; 2909 } 2910 // log_debug("sco rx %u", conn->sco_rx_ms); 2911 sco_schedule_tx(conn); 2912 } 2913 } 2914 } 2915 // deliver to app 2916 if (hci_stack->sco_packet_handler) { 2917 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2918 } 2919 2920 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2921 conn->num_packets_completed++; 2922 hci_stack->host_completed_packets = 1; 2923 hci_run(); 2924 #endif 2925 } 2926 #endif 2927 2928 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2929 hci_dump_packet(packet_type, 1, packet, size); 2930 switch (packet_type) { 2931 case HCI_EVENT_PACKET: 2932 event_handler(packet, size); 2933 break; 2934 case HCI_ACL_DATA_PACKET: 2935 acl_handler(packet, size); 2936 break; 2937 #ifdef ENABLE_CLASSIC 2938 case HCI_SCO_DATA_PACKET: 2939 sco_handler(packet, size); 2940 break; 2941 #endif 2942 default: 2943 break; 2944 } 2945 } 2946 2947 /** 2948 * @brief Add event packet handler. 2949 */ 2950 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2951 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2952 } 2953 2954 2955 /** Register HCI packet handlers */ 2956 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2957 hci_stack->acl_packet_handler = handler; 2958 } 2959 2960 #ifdef ENABLE_CLASSIC 2961 /** 2962 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2963 */ 2964 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2965 hci_stack->sco_packet_handler = handler; 2966 } 2967 #endif 2968 2969 static void hci_state_reset(void){ 2970 // no connections yet 2971 hci_stack->connections = NULL; 2972 2973 // keep discoverable/connectable as this has been requested by the client(s) 2974 // hci_stack->discoverable = 0; 2975 // hci_stack->connectable = 0; 2976 // hci_stack->bondable = 1; 2977 // hci_stack->own_addr_type = 0; 2978 2979 // buffer is free 2980 hci_stack->hci_packet_buffer_reserved = 0; 2981 2982 // no pending cmds 2983 hci_stack->decline_reason = 0; 2984 hci_stack->new_scan_enable_value = 0xff; 2985 2986 // LE 2987 #ifdef ENABLE_BLE 2988 memset(hci_stack->le_random_address, 0, 6); 2989 hci_stack->le_random_address_set = 0; 2990 #endif 2991 #ifdef ENABLE_LE_CENTRAL 2992 hci_stack->le_scanning_active = 0; 2993 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2994 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2995 hci_stack->le_whitelist_capacity = 0; 2996 #endif 2997 } 2998 2999 #ifdef ENABLE_CLASSIC 3000 /** 3001 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3002 */ 3003 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3004 // store and open remote device db 3005 hci_stack->link_key_db = link_key_db; 3006 if (hci_stack->link_key_db) { 3007 hci_stack->link_key_db->open(); 3008 } 3009 } 3010 #endif 3011 3012 void hci_init(const hci_transport_t *transport, const void *config){ 3013 3014 #ifdef HAVE_MALLOC 3015 if (!hci_stack) { 3016 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3017 } 3018 #else 3019 hci_stack = &hci_stack_static; 3020 #endif 3021 memset(hci_stack, 0, sizeof(hci_stack_t)); 3022 3023 // reference to use transport layer implementation 3024 hci_stack->hci_transport = transport; 3025 3026 // reference to used config 3027 hci_stack->config = config; 3028 3029 // setup pointer for outgoing packet buffer 3030 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3031 3032 // max acl payload size defined in config.h 3033 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3034 3035 // register packet handlers with transport 3036 transport->register_packet_handler(&packet_handler); 3037 3038 hci_stack->state = HCI_STATE_OFF; 3039 3040 // class of device 3041 hci_stack->class_of_device = 0x007a020c; // Smartphone 3042 3043 // bondable by default 3044 hci_stack->bondable = 1; 3045 3046 #ifdef ENABLE_CLASSIC 3047 // classic name 3048 hci_stack->local_name = default_classic_name; 3049 3050 // Master slave policy 3051 hci_stack->master_slave_policy = 1; 3052 3053 // Allow Role Switch 3054 hci_stack->allow_role_switch = 1; 3055 3056 // Default / minimum security level = 2 3057 hci_stack->gap_security_level = LEVEL_2; 3058 3059 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3060 hci_stack->gap_required_encyrption_key_size = 7; 3061 #endif 3062 3063 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3064 hci_stack->ssp_enable = 1; 3065 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3066 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3067 hci_stack->ssp_auto_accept = 1; 3068 3069 // Secure Connections: enable (requires support from Controller) 3070 hci_stack->secure_connections_enable = true; 3071 3072 // voice setting - signed 16 bit pcm data with CVSD over the air 3073 hci_stack->sco_voice_setting = 0x60; 3074 3075 #ifdef ENABLE_LE_CENTRAL 3076 // connection parameter to use for outgoing connections 3077 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3078 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3079 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3080 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3081 hci_stack->le_connection_latency = 4; // 4 3082 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3083 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3084 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3085 3086 // default LE Scanning 3087 hci_stack->le_scan_type = 0x1; // active 3088 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3089 hci_stack->le_scan_window = 0x30; // 30 ms 3090 #endif 3091 3092 #ifdef ENABLE_LE_PERIPHERAL 3093 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3094 #endif 3095 3096 // connection parameter range used to answer connection parameter update requests in l2cap 3097 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3098 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3099 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3100 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3101 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3102 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3103 3104 hci_state_reset(); 3105 } 3106 3107 /** 3108 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3109 */ 3110 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3111 hci_stack->chipset = chipset_driver; 3112 3113 // reset chipset driver - init is also called on power_up 3114 if (hci_stack->chipset && hci_stack->chipset->init){ 3115 hci_stack->chipset->init(hci_stack->config); 3116 } 3117 } 3118 3119 /** 3120 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3121 */ 3122 void hci_set_control(const btstack_control_t *hardware_control){ 3123 // references to used control implementation 3124 hci_stack->control = hardware_control; 3125 // init with transport config 3126 hardware_control->init(hci_stack->config); 3127 } 3128 3129 void hci_close(void){ 3130 // close remote device db 3131 if (hci_stack->link_key_db) { 3132 hci_stack->link_key_db->close(); 3133 } 3134 3135 btstack_linked_list_iterator_t lit; 3136 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3137 while (btstack_linked_list_iterator_has_next(&lit)){ 3138 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3139 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3140 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3141 hci_shutdown_connection(connection); 3142 } 3143 3144 hci_power_control(HCI_POWER_OFF); 3145 3146 #ifdef HAVE_MALLOC 3147 free(hci_stack); 3148 #endif 3149 hci_stack = NULL; 3150 } 3151 3152 #ifdef ENABLE_CLASSIC 3153 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3154 // validate ranage and set 3155 if (encryption_key_size < 7) return; 3156 if (encryption_key_size > 16) return; 3157 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3158 } 3159 3160 void gap_set_security_level(gap_security_level_t security_level){ 3161 hci_stack->gap_security_level = security_level; 3162 } 3163 3164 gap_security_level_t gap_get_security_level(void){ 3165 return hci_stack->gap_security_level; 3166 } 3167 #endif 3168 3169 #ifdef ENABLE_CLASSIC 3170 void gap_set_class_of_device(uint32_t class_of_device){ 3171 hci_stack->class_of_device = class_of_device; 3172 } 3173 3174 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3175 hci_stack->default_link_policy_settings = default_link_policy_settings; 3176 } 3177 3178 void gap_set_allow_role_switch(bool allow_role_switch){ 3179 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3180 } 3181 3182 uint8_t hci_get_allow_role_switch(void){ 3183 return hci_stack->allow_role_switch; 3184 } 3185 3186 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3187 hci_stack->link_supervision_timeout = link_supervision_timeout; 3188 } 3189 3190 void hci_disable_l2cap_timeout_check(void){ 3191 disable_l2cap_timeouts = 1; 3192 } 3193 #endif 3194 3195 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3196 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3197 void hci_set_bd_addr(bd_addr_t addr){ 3198 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3199 hci_stack->custom_bd_addr_set = 1; 3200 } 3201 #endif 3202 3203 // State-Module-Driver overview 3204 // state module low-level 3205 // HCI_STATE_OFF off close 3206 // HCI_STATE_INITIALIZING, on open 3207 // HCI_STATE_WORKING, on open 3208 // HCI_STATE_HALTING, on open 3209 // HCI_STATE_SLEEPING, off/sleep close 3210 // HCI_STATE_FALLING_ASLEEP on open 3211 3212 static int hci_power_control_on(void){ 3213 3214 // power on 3215 int err = 0; 3216 if (hci_stack->control && hci_stack->control->on){ 3217 err = (*hci_stack->control->on)(); 3218 } 3219 if (err){ 3220 log_error( "POWER_ON failed"); 3221 hci_emit_hci_open_failed(); 3222 return err; 3223 } 3224 3225 // int chipset driver 3226 if (hci_stack->chipset && hci_stack->chipset->init){ 3227 hci_stack->chipset->init(hci_stack->config); 3228 } 3229 3230 // init transport 3231 if (hci_stack->hci_transport->init){ 3232 hci_stack->hci_transport->init(hci_stack->config); 3233 } 3234 3235 // open transport 3236 err = hci_stack->hci_transport->open(); 3237 if (err){ 3238 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3239 if (hci_stack->control && hci_stack->control->off){ 3240 (*hci_stack->control->off)(); 3241 } 3242 hci_emit_hci_open_failed(); 3243 return err; 3244 } 3245 return 0; 3246 } 3247 3248 static void hci_power_control_off(void){ 3249 3250 log_info("hci_power_control_off"); 3251 3252 // close low-level device 3253 hci_stack->hci_transport->close(); 3254 3255 log_info("hci_power_control_off - hci_transport closed"); 3256 3257 // power off 3258 if (hci_stack->control && hci_stack->control->off){ 3259 (*hci_stack->control->off)(); 3260 } 3261 3262 log_info("hci_power_control_off - control closed"); 3263 3264 hci_stack->state = HCI_STATE_OFF; 3265 } 3266 3267 static void hci_power_control_sleep(void){ 3268 3269 log_info("hci_power_control_sleep"); 3270 3271 #if 0 3272 // don't close serial port during sleep 3273 3274 // close low-level device 3275 hci_stack->hci_transport->close(hci_stack->config); 3276 #endif 3277 3278 // sleep mode 3279 if (hci_stack->control && hci_stack->control->sleep){ 3280 (*hci_stack->control->sleep)(); 3281 } 3282 3283 hci_stack->state = HCI_STATE_SLEEPING; 3284 } 3285 3286 static int hci_power_control_wake(void){ 3287 3288 log_info("hci_power_control_wake"); 3289 3290 // wake on 3291 if (hci_stack->control && hci_stack->control->wake){ 3292 (*hci_stack->control->wake)(); 3293 } 3294 3295 #if 0 3296 // open low-level device 3297 int err = hci_stack->hci_transport->open(hci_stack->config); 3298 if (err){ 3299 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3300 if (hci_stack->control && hci_stack->control->off){ 3301 (*hci_stack->control->off)(); 3302 } 3303 hci_emit_hci_open_failed(); 3304 return err; 3305 } 3306 #endif 3307 3308 return 0; 3309 } 3310 3311 static void hci_power_transition_to_initializing(void){ 3312 // set up state machine 3313 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3314 hci_stack->hci_packet_buffer_reserved = 0; 3315 hci_stack->state = HCI_STATE_INITIALIZING; 3316 hci_stack->substate = HCI_INIT_SEND_RESET; 3317 } 3318 3319 int hci_power_control(HCI_POWER_MODE power_mode){ 3320 3321 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3322 3323 int err = 0; 3324 switch (hci_stack->state){ 3325 3326 case HCI_STATE_OFF: 3327 switch (power_mode){ 3328 case HCI_POWER_ON: 3329 err = hci_power_control_on(); 3330 if (err) { 3331 log_error("hci_power_control_on() error %d", err); 3332 return err; 3333 } 3334 hci_power_transition_to_initializing(); 3335 break; 3336 case HCI_POWER_OFF: 3337 // do nothing 3338 break; 3339 case HCI_POWER_SLEEP: 3340 // do nothing (with SLEEP == OFF) 3341 break; 3342 } 3343 break; 3344 3345 case HCI_STATE_INITIALIZING: 3346 switch (power_mode){ 3347 case HCI_POWER_ON: 3348 // do nothing 3349 break; 3350 case HCI_POWER_OFF: 3351 // no connections yet, just turn it off 3352 hci_power_control_off(); 3353 break; 3354 case HCI_POWER_SLEEP: 3355 // no connections yet, just turn it off 3356 hci_power_control_sleep(); 3357 break; 3358 } 3359 break; 3360 3361 case HCI_STATE_WORKING: 3362 switch (power_mode){ 3363 case HCI_POWER_ON: 3364 // do nothing 3365 break; 3366 case HCI_POWER_OFF: 3367 // see hci_run 3368 hci_stack->state = HCI_STATE_HALTING; 3369 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3370 break; 3371 case HCI_POWER_SLEEP: 3372 // see hci_run 3373 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3374 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3375 break; 3376 } 3377 break; 3378 3379 case HCI_STATE_HALTING: 3380 switch (power_mode){ 3381 case HCI_POWER_ON: 3382 hci_power_transition_to_initializing(); 3383 break; 3384 case HCI_POWER_OFF: 3385 // do nothing 3386 break; 3387 case HCI_POWER_SLEEP: 3388 // see hci_run 3389 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3390 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3391 break; 3392 } 3393 break; 3394 3395 case HCI_STATE_FALLING_ASLEEP: 3396 switch (power_mode){ 3397 case HCI_POWER_ON: 3398 3399 #ifdef HAVE_PLATFORM_IPHONE_OS 3400 // nothing to do, if H4 supports power management 3401 if (btstack_control_iphone_power_management_enabled()){ 3402 hci_stack->state = HCI_STATE_INITIALIZING; 3403 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3404 break; 3405 } 3406 #endif 3407 hci_power_transition_to_initializing(); 3408 break; 3409 case HCI_POWER_OFF: 3410 // see hci_run 3411 hci_stack->state = HCI_STATE_HALTING; 3412 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3413 break; 3414 case HCI_POWER_SLEEP: 3415 // do nothing 3416 break; 3417 } 3418 break; 3419 3420 case HCI_STATE_SLEEPING: 3421 switch (power_mode){ 3422 case HCI_POWER_ON: 3423 3424 #ifdef HAVE_PLATFORM_IPHONE_OS 3425 // nothing to do, if H4 supports power management 3426 if (btstack_control_iphone_power_management_enabled()){ 3427 hci_stack->state = HCI_STATE_INITIALIZING; 3428 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3429 hci_update_scan_enable(); 3430 break; 3431 } 3432 #endif 3433 err = hci_power_control_wake(); 3434 if (err) return err; 3435 hci_power_transition_to_initializing(); 3436 break; 3437 case HCI_POWER_OFF: 3438 hci_stack->state = HCI_STATE_HALTING; 3439 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3440 break; 3441 case HCI_POWER_SLEEP: 3442 // do nothing 3443 break; 3444 } 3445 break; 3446 } 3447 3448 // create internal event 3449 hci_emit_state(); 3450 3451 // trigger next/first action 3452 hci_run(); 3453 3454 return 0; 3455 } 3456 3457 3458 #ifdef ENABLE_CLASSIC 3459 3460 static void hci_update_scan_enable(void){ 3461 // 2 = page scan, 1 = inq scan 3462 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3463 hci_run(); 3464 } 3465 3466 void gap_discoverable_control(uint8_t enable){ 3467 if (enable) enable = 1; // normalize argument 3468 3469 if (hci_stack->discoverable == enable){ 3470 hci_emit_discoverable_enabled(hci_stack->discoverable); 3471 return; 3472 } 3473 3474 hci_stack->discoverable = enable; 3475 hci_update_scan_enable(); 3476 } 3477 3478 void gap_connectable_control(uint8_t enable){ 3479 if (enable) enable = 1; // normalize argument 3480 3481 // don't emit event 3482 if (hci_stack->connectable == enable) return; 3483 3484 hci_stack->connectable = enable; 3485 hci_update_scan_enable(); 3486 } 3487 #endif 3488 3489 void gap_local_bd_addr(bd_addr_t address_buffer){ 3490 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3491 } 3492 3493 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3494 static void hci_host_num_completed_packets(void){ 3495 3496 // create packet manually as arrays are not supported and num_commands should not get reduced 3497 hci_reserve_packet_buffer(); 3498 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3499 3500 uint16_t size = 0; 3501 uint16_t num_handles = 0; 3502 packet[size++] = 0x35; 3503 packet[size++] = 0x0c; 3504 size++; // skip param len 3505 size++; // skip num handles 3506 3507 // add { handle, packets } entries 3508 btstack_linked_item_t * it; 3509 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3510 hci_connection_t * connection = (hci_connection_t *) it; 3511 if (connection->num_packets_completed){ 3512 little_endian_store_16(packet, size, connection->con_handle); 3513 size += 2; 3514 little_endian_store_16(packet, size, connection->num_packets_completed); 3515 size += 2; 3516 // 3517 num_handles++; 3518 connection->num_packets_completed = 0; 3519 } 3520 } 3521 3522 packet[2] = size - 3; 3523 packet[3] = num_handles; 3524 3525 hci_stack->host_completed_packets = 0; 3526 3527 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3528 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3529 3530 // release packet buffer for synchronous transport implementations 3531 if (hci_transport_synchronous()){ 3532 hci_release_packet_buffer(); 3533 hci_emit_transport_packet_sent(); 3534 } 3535 } 3536 #endif 3537 3538 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3539 UNUSED(ds); 3540 hci_stack->substate = HCI_HALTING_CLOSE; 3541 // allow packet handlers to defer final shutdown 3542 hci_emit_state(); 3543 hci_run(); 3544 } 3545 3546 static bool hci_run_acl_fragments(void){ 3547 if (hci_stack->acl_fragmentation_total_size > 0u) { 3548 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3549 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3550 if (connection) { 3551 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3552 hci_send_acl_packet_fragments(connection); 3553 return true; 3554 } 3555 } else { 3556 // connection gone -> discard further fragments 3557 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3558 hci_stack->acl_fragmentation_total_size = 0; 3559 hci_stack->acl_fragmentation_pos = 0; 3560 } 3561 } 3562 return false; 3563 } 3564 3565 #ifdef ENABLE_CLASSIC 3566 static bool hci_run_general_gap_classic(void){ 3567 3568 // decline incoming connections 3569 if (hci_stack->decline_reason){ 3570 uint8_t reason = hci_stack->decline_reason; 3571 hci_stack->decline_reason = 0; 3572 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3573 return true; 3574 } 3575 // send scan enable 3576 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3577 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3578 hci_stack->new_scan_enable_value = 0xff; 3579 return true; 3580 } 3581 // start/stop inquiry 3582 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3583 uint8_t duration = hci_stack->inquiry_state; 3584 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3585 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3586 return true; 3587 } 3588 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3589 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3590 hci_send_cmd(&hci_inquiry_cancel); 3591 return true; 3592 } 3593 // remote name request 3594 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3595 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3596 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3597 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3598 return true; 3599 } 3600 // pairing 3601 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3602 uint8_t state = hci_stack->gap_pairing_state; 3603 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3604 switch (state){ 3605 case GAP_PAIRING_STATE_SEND_PIN: 3606 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); 3607 break; 3608 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3609 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3610 break; 3611 case GAP_PAIRING_STATE_SEND_PASSKEY: 3612 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3613 break; 3614 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3615 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3616 break; 3617 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3618 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3619 break; 3620 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3621 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3622 break; 3623 default: 3624 break; 3625 } 3626 return true; 3627 } 3628 return false; 3629 } 3630 #endif 3631 3632 #ifdef ENABLE_BLE 3633 static bool hci_run_general_gap_le(void){ 3634 3635 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3636 3637 if (hci_stack->state != HCI_STATE_WORKING) return false; 3638 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3639 3640 3641 // Phase 1: collect what to stop 3642 3643 bool scanning_stop = false; 3644 bool connecting_stop = false; 3645 bool advertising_stop = false; 3646 3647 #ifndef ENABLE_LE_CENTRAL 3648 UNUSED(scanning_stop); 3649 UNUSED(connecting_stop); 3650 #endif 3651 #ifndef ENABLE_LE_PERIPHERAL 3652 UNUSED(advertising_stop); 3653 #endif 3654 3655 // check if whitelist needs modification 3656 bool whitelist_modification_pending = false; 3657 btstack_linked_list_iterator_t lit; 3658 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3659 while (btstack_linked_list_iterator_has_next(&lit)){ 3660 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3661 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3662 whitelist_modification_pending = true; 3663 break; 3664 } 3665 } 3666 // check if resolving list needs modification 3667 bool resolving_list_modification_pending = false; 3668 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3669 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3670 resolving_list_modification_pending = true; 3671 } 3672 #endif 3673 3674 #ifdef ENABLE_LE_CENTRAL 3675 // scanning control 3676 if (hci_stack->le_scanning_active) { 3677 // stop if: 3678 // - parameter change required 3679 // - it's disabled 3680 // - whitelist change required but used for scanning 3681 // - resolving list modified 3682 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3683 if ((hci_stack->le_scanning_param_update) || 3684 !hci_stack->le_scanning_enabled || 3685 scanning_uses_whitelist || 3686 resolving_list_modification_pending){ 3687 3688 scanning_stop = true; 3689 } 3690 } 3691 #endif 3692 3693 #ifdef ENABLE_LE_CENTRAL 3694 // connecting control 3695 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3696 // stop connecting if: 3697 // - connecting uses white and whitelist modification pending 3698 // - if it got disabled 3699 // - resolving list modified 3700 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3701 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3702 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3703 resolving_list_modification_pending) { 3704 3705 connecting_stop = true; 3706 } 3707 } 3708 #endif 3709 3710 #ifdef ENABLE_LE_PERIPHERAL 3711 // le advertisement control 3712 if (hci_stack->le_advertisements_active){ 3713 // stop if: 3714 // - parameter change required 3715 // - it's disabled 3716 // - whitelist change required but used for advertisement filter policy 3717 // - resolving list modified 3718 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3719 if ((hci_stack->le_advertisements_todo != 0) || 3720 !hci_stack->le_advertisements_enabled_for_current_roles || 3721 (advertising_uses_whitelist & whitelist_modification_pending) || 3722 resolving_list_modification_pending) { 3723 3724 advertising_stop = true; 3725 } 3726 } 3727 #endif 3728 3729 3730 // Phase 2: stop everything that should be off during modifications 3731 3732 #ifdef ENABLE_LE_CENTRAL 3733 if (scanning_stop){ 3734 hci_stack->le_scanning_active = false; 3735 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3736 return true; 3737 } 3738 #endif 3739 3740 #ifdef ENABLE_LE_CENTRAL 3741 if (connecting_stop){ 3742 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3743 hci_send_cmd(&hci_le_create_connection_cancel); 3744 return true; 3745 } 3746 } 3747 #endif 3748 3749 #ifdef ENABLE_LE_PERIPHERAL 3750 if (advertising_stop){ 3751 hci_stack->le_advertisements_active = false; 3752 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3753 return true; 3754 } 3755 #endif 3756 3757 // Phase 3: modify 3758 3759 #ifdef ENABLE_LE_CENTRAL 3760 if (hci_stack->le_scanning_param_update){ 3761 hci_stack->le_scanning_param_update = false; 3762 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3763 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3764 return true; 3765 } 3766 #endif 3767 3768 #ifdef ENABLE_LE_PERIPHERAL 3769 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3770 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3771 hci_send_cmd(&hci_le_set_advertising_parameters, 3772 hci_stack->le_advertisements_interval_min, 3773 hci_stack->le_advertisements_interval_max, 3774 hci_stack->le_advertisements_type, 3775 hci_stack->le_own_addr_type, 3776 hci_stack->le_advertisements_direct_address_type, 3777 hci_stack->le_advertisements_direct_address, 3778 hci_stack->le_advertisements_channel_map, 3779 hci_stack->le_advertisements_filter_policy); 3780 return true; 3781 } 3782 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3783 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3784 uint8_t adv_data_clean[31]; 3785 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3786 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3787 hci_stack->le_advertisements_data_len); 3788 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3789 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3790 return true; 3791 } 3792 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3793 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3794 uint8_t scan_data_clean[31]; 3795 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3796 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3797 hci_stack->le_scan_response_data_len); 3798 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3799 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3800 return true; 3801 } 3802 #endif 3803 3804 3805 #ifdef ENABLE_LE_CENTRAL 3806 // if connect with whitelist was active and is not cancelled yet, wait until next time 3807 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3808 #endif 3809 3810 // LE Whitelist Management 3811 if (whitelist_modification_pending){ 3812 // add/remove entries 3813 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3814 while (btstack_linked_list_iterator_has_next(&lit)){ 3815 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3816 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3817 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3818 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3819 return true; 3820 } 3821 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3822 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3823 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3824 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3825 return true; 3826 } 3827 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3828 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3829 btstack_memory_whitelist_entry_free(entry); 3830 } 3831 } 3832 } 3833 3834 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3835 // LE Resolving List Management 3836 uint16_t i; 3837 switch (hci_stack->le_resolving_list_state){ 3838 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3839 // check if supported 3840 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0){ 3841 log_info("LE Address Resolution not supported"); 3842 break; 3843 } else { 3844 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3845 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3846 return true; 3847 } 3848 break; 3849 case LE_RESOLVING_LIST_READ_SIZE: 3850 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3851 hci_send_cmd(&hci_le_read_resolving_list_size); 3852 return true; 3853 case LE_RESOLVING_LIST_SEND_CLEAR: 3854 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3855 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, sizeof(hci_stack->le_resolving_list_add_entries)); 3856 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, sizeof(hci_stack->le_resolving_list_remove_entries)); 3857 hci_send_cmd(&hci_le_clear_resolving_list); 3858 return true; 3859 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3860 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3861 uint8_t offset = i >> 3; 3862 uint8_t mask = 1 << (i & 7); 3863 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3864 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3865 bd_addr_t peer_identity_addreses; 3866 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3867 sm_key_t peer_irk; 3868 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3869 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3870 3871 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3872 // trigger whitelist entry 'update' (work around for controller bug) 3873 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3874 while (btstack_linked_list_iterator_has_next(&lit)) { 3875 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3876 if (entry->address_type != peer_identity_addr_type) continue; 3877 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3878 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3879 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3880 } 3881 #endif 3882 3883 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, peer_identity_addreses); 3884 return true; 3885 } 3886 3887 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3888 3889 /* fall through */ 3890 3891 case LE_RESOLVING_LIST_ADD_ENTRIES: 3892 for (i = 0 ; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++){ 3893 uint8_t offset = i >> 3; 3894 uint8_t mask = 1 << (i & 7); 3895 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3896 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3897 bd_addr_t peer_identity_addreses; 3898 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3899 sm_key_t peer_irk; 3900 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3901 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3902 const uint8_t * local_irk = gap_get_persistent_irk(); 3903 // command uses format specifier 'P' that stores 16-byte value without flip 3904 uint8_t local_irk_flipped[16]; 3905 uint8_t peer_irk_flipped[16]; 3906 reverse_128(local_irk, local_irk_flipped); 3907 reverse_128(peer_irk, peer_irk_flipped); 3908 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, peer_irk_flipped, local_irk_flipped); 3909 return true; 3910 } 3911 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3912 break; 3913 3914 default: 3915 break; 3916 } 3917 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3918 #endif 3919 3920 // Phase 4: restore state 3921 3922 #ifdef ENABLE_LE_CENTRAL 3923 // re-start scanning 3924 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3925 hci_stack->le_scanning_active = true; 3926 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3927 return true; 3928 } 3929 #endif 3930 3931 #ifdef ENABLE_LE_CENTRAL 3932 // re-start connecting 3933 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3934 bd_addr_t null_addr; 3935 memset(null_addr, 0, 6); 3936 hci_send_cmd(&hci_le_create_connection, 3937 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3938 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3939 1, // use whitelist 3940 0, // peer address type 3941 null_addr, // peer bd addr 3942 hci_stack->le_own_addr_type, // our addr type: 3943 hci_stack->le_connection_interval_min, // conn interval min 3944 hci_stack->le_connection_interval_max, // conn interval max 3945 hci_stack->le_connection_latency, // conn latency 3946 hci_stack->le_supervision_timeout, // conn latency 3947 hci_stack->le_minimum_ce_length, // min ce length 3948 hci_stack->le_maximum_ce_length // max ce length 3949 ); 3950 return true; 3951 } 3952 #endif 3953 3954 #ifdef ENABLE_LE_PERIPHERAL 3955 // re-start advertising 3956 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 3957 // check if advertisements should be enabled given 3958 hci_stack->le_advertisements_active = true; 3959 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3960 return true; 3961 } 3962 #endif 3963 3964 return false; 3965 } 3966 #endif 3967 3968 static bool hci_run_general_pending_commands(void){ 3969 btstack_linked_item_t * it; 3970 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3971 hci_connection_t * connection = (hci_connection_t *) it; 3972 3973 switch(connection->state){ 3974 case SEND_CREATE_CONNECTION: 3975 switch(connection->address_type){ 3976 #ifdef ENABLE_CLASSIC 3977 case BD_ADDR_TYPE_ACL: 3978 log_info("sending hci_create_connection"); 3979 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3980 break; 3981 #endif 3982 default: 3983 #ifdef ENABLE_BLE 3984 #ifdef ENABLE_LE_CENTRAL 3985 log_info("sending hci_le_create_connection"); 3986 hci_send_cmd(&hci_le_create_connection, 3987 hci_stack->le_connection_scan_interval, // conn scan interval 3988 hci_stack->le_connection_scan_window, // conn scan windows 3989 0, // don't use whitelist 3990 connection->address_type, // peer address type 3991 connection->address, // peer bd addr 3992 hci_stack->le_own_addr_type, // our addr type: 3993 hci_stack->le_connection_interval_min, // conn interval min 3994 hci_stack->le_connection_interval_max, // conn interval max 3995 hci_stack->le_connection_latency, // conn latency 3996 hci_stack->le_supervision_timeout, // conn latency 3997 hci_stack->le_minimum_ce_length, // min ce length 3998 hci_stack->le_maximum_ce_length // max ce length 3999 ); 4000 connection->state = SENT_CREATE_CONNECTION; 4001 #endif 4002 #endif 4003 break; 4004 } 4005 return true; 4006 4007 #ifdef ENABLE_CLASSIC 4008 case RECEIVED_CONNECTION_REQUEST: 4009 connection->role = HCI_ROLE_SLAVE; 4010 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4011 log_info("sending hci_accept_connection_request"); 4012 connection->state = ACCEPTED_CONNECTION_REQUEST; 4013 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4014 } 4015 return true; 4016 #endif 4017 4018 #ifdef ENABLE_BLE 4019 #ifdef ENABLE_LE_CENTRAL 4020 case SEND_CANCEL_CONNECTION: 4021 connection->state = SENT_CANCEL_CONNECTION; 4022 hci_send_cmd(&hci_le_create_connection_cancel); 4023 return true; 4024 #endif 4025 #endif 4026 case SEND_DISCONNECT: 4027 connection->state = SENT_DISCONNECT; 4028 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4029 return true; 4030 4031 default: 4032 break; 4033 } 4034 4035 // no further commands if connection is about to get shut down 4036 if (connection->state == SENT_DISCONNECT) continue; 4037 4038 if (connection->authentication_flags & READ_RSSI){ 4039 connectionClearAuthenticationFlags(connection, READ_RSSI); 4040 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4041 return true; 4042 } 4043 4044 #ifdef ENABLE_CLASSIC 4045 4046 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4047 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4048 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4049 return true; 4050 } 4051 4052 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4053 log_info("responding to link key request"); 4054 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4055 4056 link_key_t link_key; 4057 link_key_type_t link_key_type; 4058 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4059 4060 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4061 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4062 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4063 if (sc_downgrade){ 4064 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4065 connection->state = SENT_DISCONNECT; 4066 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4067 return true; 4068 } 4069 4070 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4071 if (have_link_key && security_level_sufficient){ 4072 connection->link_key_type = link_key_type; 4073 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4074 } else { 4075 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4076 } 4077 return true; 4078 } 4079 4080 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4081 log_info("denying to pin request"); 4082 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4083 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4084 return true; 4085 } 4086 4087 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4088 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4089 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4090 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4091 // tweak authentication requirements 4092 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4093 if (connection->bonding_flags & BONDING_DEDICATED){ 4094 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4095 } 4096 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4097 authreq |= 1; 4098 } 4099 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4100 } else { 4101 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4102 } 4103 return true; 4104 } 4105 4106 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4107 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4108 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4109 return true; 4110 } 4111 4112 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4113 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4114 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4115 return true; 4116 } 4117 4118 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4119 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4120 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4121 return true; 4122 } 4123 4124 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4125 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4126 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4127 return true; 4128 } 4129 4130 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4131 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4132 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4133 return true; 4134 } 4135 4136 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4137 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4138 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4139 connection->state = SENT_DISCONNECT; 4140 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4141 return true; 4142 } 4143 4144 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4145 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4146 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4147 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4148 return true; 4149 } 4150 4151 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4152 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4153 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4154 return true; 4155 } 4156 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4157 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4158 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4159 return true; 4160 } 4161 #endif 4162 4163 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4164 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4165 if (connection->state != SENT_DISCONNECT){ 4166 connection->state = SENT_DISCONNECT; 4167 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4168 return true; 4169 } 4170 } 4171 4172 #ifdef ENABLE_CLASSIC 4173 uint16_t sniff_min_interval; 4174 switch (connection->sniff_min_interval){ 4175 case 0: 4176 break; 4177 case 0xffff: 4178 connection->sniff_min_interval = 0; 4179 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4180 return true; 4181 default: 4182 sniff_min_interval = connection->sniff_min_interval; 4183 connection->sniff_min_interval = 0; 4184 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4185 return true; 4186 } 4187 4188 if (connection->request_role != HCI_ROLE_INVALID){ 4189 hci_role_t role = connection->request_role; 4190 connection->request_role = HCI_ROLE_INVALID; 4191 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4192 return true; 4193 } 4194 #endif 4195 4196 #ifdef ENABLE_BLE 4197 switch (connection->le_con_parameter_update_state){ 4198 // response to L2CAP CON PARAMETER UPDATE REQUEST 4199 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4200 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4201 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4202 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4203 0x0000, 0xffff); 4204 return true; 4205 case CON_PARAMETER_UPDATE_REPLY: 4206 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4207 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4208 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4209 0x0000, 0xffff); 4210 return true; 4211 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4212 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4213 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4214 return true; 4215 default: 4216 break; 4217 } 4218 if (connection->le_phy_update_all_phys != 0xffu){ 4219 uint8_t all_phys = connection->le_phy_update_all_phys; 4220 connection->le_phy_update_all_phys = 0xff; 4221 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); 4222 return true; 4223 } 4224 #endif 4225 } 4226 return false; 4227 } 4228 4229 static void hci_run(void){ 4230 4231 bool done; 4232 4233 // send continuation fragments first, as they block the prepared packet buffer 4234 done = hci_run_acl_fragments(); 4235 if (done) return; 4236 4237 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4238 // send host num completed packets next as they don't require num_cmd_packets > 0 4239 if (!hci_can_send_comand_packet_transport()) return; 4240 if (hci_stack->host_completed_packets){ 4241 hci_host_num_completed_packets(); 4242 return; 4243 } 4244 #endif 4245 4246 if (!hci_can_send_command_packet_now()) return; 4247 4248 // global/non-connection oriented commands 4249 4250 4251 #ifdef ENABLE_CLASSIC 4252 // general gap classic 4253 done = hci_run_general_gap_classic(); 4254 if (done) return; 4255 #endif 4256 4257 #ifdef ENABLE_BLE 4258 // general gap le 4259 done = hci_run_general_gap_le(); 4260 if (done) return; 4261 #endif 4262 4263 // send pending HCI commands 4264 done = hci_run_general_pending_commands(); 4265 if (done) return; 4266 4267 // stack state sub statemachines 4268 hci_connection_t * connection; 4269 switch (hci_stack->state){ 4270 case HCI_STATE_INITIALIZING: 4271 hci_initializing_run(); 4272 break; 4273 4274 case HCI_STATE_HALTING: 4275 4276 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4277 switch (hci_stack->substate){ 4278 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4279 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4280 4281 #ifdef ENABLE_BLE 4282 #ifdef ENABLE_LE_CENTRAL 4283 // free whitelist entries 4284 { 4285 btstack_linked_list_iterator_t lit; 4286 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4287 while (btstack_linked_list_iterator_has_next(&lit)){ 4288 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4289 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4290 btstack_memory_whitelist_entry_free(entry); 4291 } 4292 } 4293 #endif 4294 #endif 4295 // close all open connections 4296 connection = (hci_connection_t *) hci_stack->connections; 4297 if (connection){ 4298 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4299 if (!hci_can_send_command_packet_now()) return; 4300 4301 // check state 4302 if (connection->state == SENT_DISCONNECT) return; 4303 connection->state = SENT_DISCONNECT; 4304 4305 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4306 4307 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4308 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4309 4310 // ... which would be ignored anyway as we shutdown (free) the connection now 4311 hci_shutdown_connection(connection); 4312 4313 // finally, send the disconnect command 4314 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4315 return; 4316 } 4317 4318 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4319 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4320 log_info("HCI_STATE_HALTING: wait 50 ms"); 4321 hci_stack->substate = HCI_HALTING_W4_TIMER; 4322 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4323 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4324 btstack_run_loop_add_timer(&hci_stack->timeout); 4325 break; 4326 } 4327 4328 /* fall through */ 4329 4330 case HCI_HALTING_CLOSE: 4331 log_info("HCI_STATE_HALTING, calling off"); 4332 4333 // switch mode 4334 hci_power_control_off(); 4335 4336 log_info("HCI_STATE_HALTING, emitting state"); 4337 hci_emit_state(); 4338 log_info("HCI_STATE_HALTING, done"); 4339 break; 4340 4341 case HCI_HALTING_W4_TIMER: 4342 // keep waiting 4343 4344 break; 4345 default: 4346 break; 4347 } 4348 4349 break; 4350 4351 case HCI_STATE_FALLING_ASLEEP: 4352 switch(hci_stack->substate) { 4353 case HCI_FALLING_ASLEEP_DISCONNECT: 4354 log_info("HCI_STATE_FALLING_ASLEEP"); 4355 // close all open connections 4356 connection = (hci_connection_t *) hci_stack->connections; 4357 4358 #ifdef HAVE_PLATFORM_IPHONE_OS 4359 // don't close connections, if H4 supports power management 4360 if (btstack_control_iphone_power_management_enabled()){ 4361 connection = NULL; 4362 } 4363 #endif 4364 if (connection){ 4365 4366 // send disconnect 4367 if (!hci_can_send_command_packet_now()) return; 4368 4369 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4370 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4371 4372 // send disconnected event right away - causes higher layer connections to get closed, too. 4373 hci_shutdown_connection(connection); 4374 return; 4375 } 4376 4377 if (hci_classic_supported()){ 4378 // disable page and inquiry scan 4379 if (!hci_can_send_command_packet_now()) return; 4380 4381 log_info("HCI_STATE_HALTING, disabling inq scans"); 4382 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4383 4384 // continue in next sub state 4385 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4386 break; 4387 } 4388 4389 /* fall through */ 4390 4391 case HCI_FALLING_ASLEEP_COMPLETE: 4392 log_info("HCI_STATE_HALTING, calling sleep"); 4393 #ifdef HAVE_PLATFORM_IPHONE_OS 4394 // don't actually go to sleep, if H4 supports power management 4395 if (btstack_control_iphone_power_management_enabled()){ 4396 // SLEEP MODE reached 4397 hci_stack->state = HCI_STATE_SLEEPING; 4398 hci_emit_state(); 4399 break; 4400 } 4401 #endif 4402 // switch mode 4403 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4404 hci_emit_state(); 4405 break; 4406 4407 default: 4408 break; 4409 } 4410 break; 4411 4412 default: 4413 break; 4414 } 4415 } 4416 4417 int hci_send_cmd_packet(uint8_t *packet, int size){ 4418 // house-keeping 4419 4420 #ifdef ENABLE_CLASSIC 4421 bd_addr_t addr; 4422 hci_connection_t * conn; 4423 #endif 4424 #ifdef ENABLE_LE_CENTRAL 4425 uint8_t initiator_filter_policy; 4426 #endif 4427 4428 uint16_t opcode = little_endian_read_16(packet, 0); 4429 switch (opcode) { 4430 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4431 hci_stack->loopback_mode = packet[3]; 4432 break; 4433 4434 #ifdef ENABLE_CLASSIC 4435 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4436 reverse_bd_addr(&packet[3], addr); 4437 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4438 4439 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4440 if (!conn) { 4441 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4442 if (!conn) { 4443 // notify client that alloc failed 4444 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4445 return -1; // packet not sent to controller 4446 } 4447 conn->state = SEND_CREATE_CONNECTION; 4448 conn->role = HCI_ROLE_MASTER; 4449 } 4450 log_info("conn state %u", conn->state); 4451 switch (conn->state) { 4452 // if connection active exists 4453 case OPEN: 4454 // and OPEN, emit connection complete command 4455 hci_emit_connection_complete(addr, conn->con_handle, 0); 4456 return -1; // packet not sent to controller 4457 case RECEIVED_DISCONNECTION_COMPLETE: 4458 // create connection triggered in disconnect complete event, let's do it now 4459 break; 4460 case SEND_CREATE_CONNECTION: 4461 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4462 break; 4463 default: 4464 // otherwise, just ignore as it is already in the open process 4465 return -1; // packet not sent to controller 4466 } 4467 conn->state = SENT_CREATE_CONNECTION; 4468 4469 // track outgoing connection 4470 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4471 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4472 break; 4473 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4474 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4475 break; 4476 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4477 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4478 break; 4479 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4480 if (hci_stack->link_key_db) { 4481 reverse_bd_addr(&packet[3], addr); 4482 hci_stack->link_key_db->delete_link_key(addr); 4483 } 4484 break; 4485 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4486 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4487 reverse_bd_addr(&packet[3], addr); 4488 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4489 if (conn) { 4490 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4491 } 4492 break; 4493 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4494 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4495 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4496 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4497 reverse_bd_addr(&packet[3], addr); 4498 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4499 if (conn) { 4500 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4501 } 4502 break; 4503 4504 #ifdef ENABLE_SCO_OVER_HCI 4505 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4506 // setup_synchronous_connection? Voice setting at offset 22 4507 // TODO: compare to current setting if sco connection already active 4508 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4509 break; 4510 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4511 // accept_synchronus_connection? Voice setting at offset 18 4512 // TODO: compare to current setting if sco connection already active 4513 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4514 break; 4515 #endif 4516 #endif 4517 4518 #ifdef ENABLE_BLE 4519 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4520 hci_stack->le_random_address_set = 1; 4521 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4522 break; 4523 #ifdef ENABLE_LE_PERIPHERAL 4524 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4525 hci_stack->le_advertisements_active = packet[3] != 0; 4526 break; 4527 #endif 4528 #ifdef ENABLE_LE_CENTRAL 4529 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4530 // white list used? 4531 initiator_filter_policy = packet[7]; 4532 switch (initiator_filter_policy) { 4533 case 0: 4534 // whitelist not used 4535 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4536 break; 4537 case 1: 4538 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4539 break; 4540 default: 4541 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4542 break; 4543 } 4544 // track outgoing connection 4545 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4546 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4547 break; 4548 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4549 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4550 break; 4551 #endif 4552 #endif 4553 default: 4554 break; 4555 } 4556 4557 hci_stack->num_cmd_packets--; 4558 4559 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4560 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4561 } 4562 4563 // disconnect because of security block 4564 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4565 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4566 if (!connection) return; 4567 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4568 } 4569 4570 4571 // Configure Secure Simple Pairing 4572 4573 #ifdef ENABLE_CLASSIC 4574 4575 // enable will enable SSP during init 4576 void gap_ssp_set_enable(int enable){ 4577 hci_stack->ssp_enable = enable; 4578 } 4579 4580 static int hci_local_ssp_activated(void){ 4581 return gap_ssp_supported() && hci_stack->ssp_enable; 4582 } 4583 4584 // if set, BTstack will respond to io capability request using authentication requirement 4585 void gap_ssp_set_io_capability(int io_capability){ 4586 hci_stack->ssp_io_capability = io_capability; 4587 } 4588 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4589 hci_stack->ssp_authentication_requirement = authentication_requirement; 4590 } 4591 4592 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4593 void gap_ssp_set_auto_accept(int auto_accept){ 4594 hci_stack->ssp_auto_accept = auto_accept; 4595 } 4596 4597 void gap_secure_connections_enable(bool enable){ 4598 hci_stack->secure_connections_enable = enable; 4599 } 4600 4601 #endif 4602 4603 // va_list part of hci_send_cmd 4604 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4605 if (!hci_can_send_command_packet_now()){ 4606 log_error("hci_send_cmd called but cannot send packet now"); 4607 return 0; 4608 } 4609 4610 // for HCI INITIALIZATION 4611 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4612 hci_stack->last_cmd_opcode = cmd->opcode; 4613 4614 hci_reserve_packet_buffer(); 4615 uint8_t * packet = hci_stack->hci_packet_buffer; 4616 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4617 int err = hci_send_cmd_packet(packet, size); 4618 4619 // release packet buffer on error or for synchronous transport implementations 4620 if ((err < 0) || hci_transport_synchronous()){ 4621 hci_release_packet_buffer(); 4622 hci_emit_transport_packet_sent(); 4623 } 4624 4625 return err; 4626 } 4627 4628 /** 4629 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4630 */ 4631 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4632 va_list argptr; 4633 va_start(argptr, cmd); 4634 int res = hci_send_cmd_va_arg(cmd, argptr); 4635 va_end(argptr); 4636 return res; 4637 } 4638 4639 // Create various non-HCI events. 4640 // TODO: generalize, use table similar to hci_create_command 4641 4642 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4643 // dump packet 4644 if (dump) { 4645 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4646 } 4647 4648 // dispatch to all event handlers 4649 btstack_linked_list_iterator_t it; 4650 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4651 while (btstack_linked_list_iterator_has_next(&it)){ 4652 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4653 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4654 } 4655 } 4656 4657 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4658 if (!hci_stack->acl_packet_handler) return; 4659 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4660 } 4661 4662 #ifdef ENABLE_CLASSIC 4663 static void hci_notify_if_sco_can_send_now(void){ 4664 // notify SCO sender if waiting 4665 if (!hci_stack->sco_waiting_for_can_send_now) return; 4666 if (hci_can_send_sco_packet_now()){ 4667 hci_stack->sco_waiting_for_can_send_now = 0; 4668 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4669 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4670 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4671 } 4672 } 4673 4674 // parsing end emitting has been merged to reduce code size 4675 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4676 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4677 4678 uint8_t * eir_data; 4679 ad_context_t context; 4680 const uint8_t * name; 4681 uint8_t name_len; 4682 4683 if (size < 3) return; 4684 4685 int event_type = hci_event_packet_get_type(packet); 4686 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4687 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4688 4689 switch (event_type){ 4690 case HCI_EVENT_INQUIRY_RESULT: 4691 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4692 if (size != (3 + (num_responses * 14))) return; 4693 break; 4694 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4695 if (size != 257) return; 4696 if (num_responses != 1) return; 4697 break; 4698 default: 4699 return; 4700 } 4701 4702 // event[1] is set at the end 4703 int i; 4704 for (i=0; i<num_responses;i++){ 4705 memset(event, 0, sizeof(event)); 4706 event[0] = GAP_EVENT_INQUIRY_RESULT; 4707 uint8_t event_size = 18; // if name is not set by EIR 4708 4709 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4710 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4711 (void)memcpy(&event[9], 4712 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4713 3); // class of device 4714 (void)memcpy(&event[12], 4715 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4716 2); // clock offset 4717 4718 switch (event_type){ 4719 case HCI_EVENT_INQUIRY_RESULT: 4720 // 14,15,16,17 = 0, size 18 4721 break; 4722 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4723 event[14] = 1; 4724 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4725 // 16,17 = 0, size 18 4726 break; 4727 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4728 event[14] = 1; 4729 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4730 // EIR packets only contain a single inquiry response 4731 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4732 name = NULL; 4733 // Iterate over EIR data 4734 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4735 uint8_t data_type = ad_iterator_get_data_type(&context); 4736 uint8_t data_size = ad_iterator_get_data_len(&context); 4737 const uint8_t * data = ad_iterator_get_data(&context); 4738 // Prefer Complete Local Name over Shortend Local Name 4739 switch (data_type){ 4740 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4741 if (name) continue; 4742 /* fall through */ 4743 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4744 name = data; 4745 name_len = data_size; 4746 break; 4747 default: 4748 break; 4749 } 4750 } 4751 if (name){ 4752 event[16] = 1; 4753 // truncate name if needed 4754 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4755 event[17] = len; 4756 (void)memcpy(&event[18], name, len); 4757 event_size += len; 4758 } 4759 break; 4760 } 4761 event[1] = event_size - 2; 4762 hci_emit_event(event, event_size, 1); 4763 } 4764 } 4765 #endif 4766 4767 void hci_emit_state(void){ 4768 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4769 uint8_t event[3]; 4770 event[0] = BTSTACK_EVENT_STATE; 4771 event[1] = sizeof(event) - 2u; 4772 event[2] = hci_stack->state; 4773 hci_emit_event(event, sizeof(event), 1); 4774 } 4775 4776 #ifdef ENABLE_CLASSIC 4777 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4778 uint8_t event[13]; 4779 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4780 event[1] = sizeof(event) - 2; 4781 event[2] = status; 4782 little_endian_store_16(event, 3, con_handle); 4783 reverse_bd_addr(address, &event[5]); 4784 event[11] = 1; // ACL connection 4785 event[12] = 0; // encryption disabled 4786 hci_emit_event(event, sizeof(event), 1); 4787 } 4788 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4789 if (disable_l2cap_timeouts) return; 4790 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4791 uint8_t event[4]; 4792 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4793 event[1] = sizeof(event) - 2; 4794 little_endian_store_16(event, 2, conn->con_handle); 4795 hci_emit_event(event, sizeof(event), 1); 4796 } 4797 #endif 4798 4799 #ifdef ENABLE_BLE 4800 #ifdef ENABLE_LE_CENTRAL 4801 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){ 4802 uint8_t event[21]; 4803 event[0] = HCI_EVENT_LE_META; 4804 event[1] = sizeof(event) - 2u; 4805 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4806 event[3] = status; 4807 little_endian_store_16(event, 4, con_handle); 4808 event[6] = 0; // TODO: role 4809 event[7] = address_type; 4810 reverse_bd_addr(address, &event[8]); 4811 little_endian_store_16(event, 14, 0); // interval 4812 little_endian_store_16(event, 16, 0); // latency 4813 little_endian_store_16(event, 18, 0); // supervision timeout 4814 event[20] = 0; // master clock accuracy 4815 hci_emit_event(event, sizeof(event), 1); 4816 } 4817 #endif 4818 #endif 4819 4820 static void hci_emit_transport_packet_sent(void){ 4821 // notify upper stack that it might be possible to send again 4822 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4823 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4824 } 4825 4826 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4827 uint8_t event[6]; 4828 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4829 event[1] = sizeof(event) - 2u; 4830 event[2] = 0; // status = OK 4831 little_endian_store_16(event, 3, con_handle); 4832 event[5] = reason; 4833 hci_emit_event(event, sizeof(event), 1); 4834 } 4835 4836 static void hci_emit_nr_connections_changed(void){ 4837 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4838 uint8_t event[3]; 4839 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4840 event[1] = sizeof(event) - 2u; 4841 event[2] = nr_hci_connections(); 4842 hci_emit_event(event, sizeof(event), 1); 4843 } 4844 4845 static void hci_emit_hci_open_failed(void){ 4846 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4847 uint8_t event[2]; 4848 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4849 event[1] = sizeof(event) - 2u; 4850 hci_emit_event(event, sizeof(event), 1); 4851 } 4852 4853 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4854 log_info("hci_emit_dedicated_bonding_result %u ", status); 4855 uint8_t event[9]; 4856 int pos = 0; 4857 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4858 event[pos++] = sizeof(event) - 2u; 4859 event[pos++] = status; 4860 reverse_bd_addr(address, &event[pos]); 4861 hci_emit_event(event, sizeof(event), 1); 4862 } 4863 4864 4865 #ifdef ENABLE_CLASSIC 4866 4867 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4868 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4869 uint8_t event[5]; 4870 int pos = 0; 4871 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4872 event[pos++] = sizeof(event) - 2; 4873 little_endian_store_16(event, 2, con_handle); 4874 pos += 2; 4875 event[pos++] = level; 4876 hci_emit_event(event, sizeof(event), 1); 4877 } 4878 4879 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4880 if (!connection) return LEVEL_0; 4881 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4882 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4883 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4884 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4885 // LEVEL 4 always requires 128 bit encrytion key size 4886 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4887 security_level = LEVEL_3; 4888 } 4889 return security_level; 4890 } 4891 4892 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4893 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4894 uint8_t event[3]; 4895 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4896 event[1] = sizeof(event) - 2; 4897 event[2] = enabled; 4898 hci_emit_event(event, sizeof(event), 1); 4899 } 4900 4901 // query if remote side supports eSCO 4902 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4903 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4904 if (!connection) return 0; 4905 return (connection->remote_supported_features[0] & 1) != 0; 4906 } 4907 4908 static bool hci_ssp_supported(hci_connection_t * connection){ 4909 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4910 return (connection->bonding_flags & mask) == mask; 4911 } 4912 4913 // query if remote side supports SSP 4914 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4915 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4916 if (!connection) return 0; 4917 return hci_ssp_supported(connection) ? 1 : 0; 4918 } 4919 4920 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4921 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4922 } 4923 4924 // GAP API 4925 /** 4926 * @bbrief enable/disable bonding. default is enabled 4927 * @praram enabled 4928 */ 4929 void gap_set_bondable_mode(int enable){ 4930 hci_stack->bondable = enable ? 1 : 0; 4931 } 4932 /** 4933 * @brief Get bondable mode. 4934 * @return 1 if bondable 4935 */ 4936 int gap_get_bondable_mode(void){ 4937 return hci_stack->bondable; 4938 } 4939 4940 /** 4941 * @brief map link keys to security levels 4942 */ 4943 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4944 switch (link_key_type){ 4945 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4946 return LEVEL_4; 4947 case COMBINATION_KEY: 4948 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4949 return LEVEL_3; 4950 default: 4951 return LEVEL_2; 4952 } 4953 } 4954 4955 /** 4956 * @brief map link keys to secure connection yes/no 4957 */ 4958 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4959 switch (link_key_type){ 4960 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4961 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4962 return 1; 4963 default: 4964 return 0; 4965 } 4966 } 4967 4968 /** 4969 * @brief map link keys to authenticated 4970 */ 4971 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4972 switch (link_key_type){ 4973 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4974 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4975 return 1; 4976 default: 4977 return 0; 4978 } 4979 } 4980 4981 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4982 log_info("gap_mitm_protection_required_for_security_level %u", level); 4983 return level > LEVEL_2; 4984 } 4985 4986 /** 4987 * @brief get current security level 4988 */ 4989 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4990 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4991 if (!connection) return LEVEL_0; 4992 return gap_security_level_for_connection(connection); 4993 } 4994 4995 /** 4996 * @brief request connection to device to 4997 * @result GAP_AUTHENTICATION_RESULT 4998 */ 4999 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5000 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5001 if (!connection){ 5002 hci_emit_security_level(con_handle, LEVEL_0); 5003 return; 5004 } 5005 gap_security_level_t current_level = gap_security_level(con_handle); 5006 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5007 requested_level, connection->requested_security_level, current_level); 5008 5009 // assumption: earlier requested security higher than current level => security request is active 5010 if (current_level < connection->requested_security_level){ 5011 if (connection->requested_security_level < requested_level){ 5012 // increase requested level as new level is higher 5013 5014 // TODO: handle re-authentication when done 5015 5016 connection->requested_security_level = requested_level; 5017 } 5018 return; 5019 } 5020 5021 // no request active, notify if security sufficient 5022 if (requested_level <= current_level){ 5023 hci_emit_security_level(con_handle, current_level); 5024 return; 5025 } 5026 5027 // start pairing to increase security level 5028 connection->requested_security_level = requested_level; 5029 5030 #if 0 5031 // sending encryption request without a link key results in an error. 5032 // TODO: figure out how to use it properly 5033 5034 // would enabling ecnryption suffice (>= LEVEL_2)? 5035 if (hci_stack->link_key_db){ 5036 link_key_type_t link_key_type; 5037 link_key_t link_key; 5038 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 5039 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 5040 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 5041 return; 5042 } 5043 } 5044 } 5045 #endif 5046 5047 // start to authenticate connection if not already active 5048 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5049 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5050 hci_run(); 5051 } 5052 5053 /** 5054 * @brief start dedicated bonding with device. disconnect after bonding 5055 * @param device 5056 * @param request MITM protection 5057 * @result GAP_DEDICATED_BONDING_COMPLETE 5058 */ 5059 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5060 5061 // create connection state machine 5062 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5063 5064 if (!connection){ 5065 return BTSTACK_MEMORY_ALLOC_FAILED; 5066 } 5067 5068 // delete linkn key 5069 gap_drop_link_key_for_bd_addr(device); 5070 5071 // configure LEVEL_2/3, dedicated bonding 5072 connection->state = SEND_CREATE_CONNECTION; 5073 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5074 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5075 connection->bonding_flags = BONDING_DEDICATED; 5076 5077 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5078 5079 // handle: connnection failure (connection complete != ok) 5080 // handle: authentication failure 5081 // handle: disconnect on done 5082 5083 hci_run(); 5084 5085 return 0; 5086 } 5087 #endif 5088 5089 void gap_set_local_name(const char * local_name){ 5090 hci_stack->local_name = local_name; 5091 } 5092 5093 5094 #ifdef ENABLE_BLE 5095 5096 #ifdef ENABLE_LE_CENTRAL 5097 void gap_start_scan(void){ 5098 hci_stack->le_scanning_enabled = true; 5099 hci_run(); 5100 } 5101 5102 void gap_stop_scan(void){ 5103 hci_stack->le_scanning_enabled = false; 5104 hci_run(); 5105 } 5106 5107 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5108 hci_stack->le_scan_type = scan_type; 5109 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5110 hci_stack->le_scan_interval = scan_interval; 5111 hci_stack->le_scan_window = scan_window; 5112 hci_stack->le_scanning_param_update = true; 5113 hci_run(); 5114 } 5115 5116 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5117 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5118 } 5119 5120 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5121 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5122 if (!conn){ 5123 // disallow if le connection is already outgoing 5124 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5125 log_error("le connection already active"); 5126 return ERROR_CODE_COMMAND_DISALLOWED; 5127 } 5128 5129 log_info("gap_connect: no connection exists yet, creating context"); 5130 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5131 if (!conn){ 5132 // notify client that alloc failed 5133 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5134 log_info("gap_connect: failed to alloc hci_connection_t"); 5135 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5136 } 5137 5138 // set le connecting state 5139 if (hci_is_le_connection_type(addr_type)){ 5140 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5141 } 5142 5143 conn->state = SEND_CREATE_CONNECTION; 5144 log_info("gap_connect: send create connection next"); 5145 hci_run(); 5146 return ERROR_CODE_SUCCESS; 5147 } 5148 5149 if (!hci_is_le_connection(conn) || 5150 (conn->state == SEND_CREATE_CONNECTION) || 5151 (conn->state == SENT_CREATE_CONNECTION)) { 5152 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5153 log_error("gap_connect: classic connection or connect is already being created"); 5154 return GATT_CLIENT_IN_WRONG_STATE; 5155 } 5156 5157 // check if connection was just disconnected 5158 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5159 log_info("gap_connect: send create connection (again)"); 5160 conn->state = SEND_CREATE_CONNECTION; 5161 hci_run(); 5162 return ERROR_CODE_SUCCESS; 5163 } 5164 5165 log_info("gap_connect: context exists with state %u", conn->state); 5166 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5167 hci_run(); 5168 return ERROR_CODE_SUCCESS; 5169 } 5170 5171 // @assumption: only a single outgoing LE Connection exists 5172 static hci_connection_t * gap_get_outgoing_connection(void){ 5173 btstack_linked_item_t *it; 5174 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5175 hci_connection_t * conn = (hci_connection_t *) it; 5176 if (!hci_is_le_connection(conn)) continue; 5177 switch (conn->state){ 5178 case SEND_CREATE_CONNECTION: 5179 case SENT_CREATE_CONNECTION: 5180 case SENT_CANCEL_CONNECTION: 5181 return conn; 5182 default: 5183 break; 5184 }; 5185 } 5186 return NULL; 5187 } 5188 5189 uint8_t gap_connect_cancel(void){ 5190 hci_connection_t * conn = gap_get_outgoing_connection(); 5191 if (!conn) return 0; 5192 switch (conn->state){ 5193 case SEND_CREATE_CONNECTION: 5194 // skip sending create connection and emit event instead 5195 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5196 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5197 btstack_memory_hci_connection_free( conn ); 5198 break; 5199 case SENT_CREATE_CONNECTION: 5200 // request to send cancel connection 5201 conn->state = SEND_CANCEL_CONNECTION; 5202 hci_run(); 5203 break; 5204 default: 5205 break; 5206 } 5207 return 0; 5208 } 5209 #endif 5210 5211 #ifdef ENABLE_LE_CENTRAL 5212 /** 5213 * @brief Set connection parameters for outgoing connections 5214 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5215 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5216 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5217 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5218 * @param conn_latency, default: 4 5219 * @param supervision_timeout (unit: 10ms), default: 720 ms 5220 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5221 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5222 */ 5223 5224 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5225 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5226 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5227 hci_stack->le_connection_scan_interval = conn_scan_interval; 5228 hci_stack->le_connection_scan_window = conn_scan_window; 5229 hci_stack->le_connection_interval_min = conn_interval_min; 5230 hci_stack->le_connection_interval_max = conn_interval_max; 5231 hci_stack->le_connection_latency = conn_latency; 5232 hci_stack->le_supervision_timeout = supervision_timeout; 5233 hci_stack->le_minimum_ce_length = min_ce_length; 5234 hci_stack->le_maximum_ce_length = max_ce_length; 5235 } 5236 #endif 5237 5238 /** 5239 * @brief Updates the connection parameters for a given LE connection 5240 * @param handle 5241 * @param conn_interval_min (unit: 1.25ms) 5242 * @param conn_interval_max (unit: 1.25ms) 5243 * @param conn_latency 5244 * @param supervision_timeout (unit: 10ms) 5245 * @returns 0 if ok 5246 */ 5247 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5248 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5249 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5250 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5251 connection->le_conn_interval_min = conn_interval_min; 5252 connection->le_conn_interval_max = conn_interval_max; 5253 connection->le_conn_latency = conn_latency; 5254 connection->le_supervision_timeout = supervision_timeout; 5255 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5256 hci_run(); 5257 return 0; 5258 } 5259 5260 /** 5261 * @brief Request an update of the connection parameter for a given LE connection 5262 * @param handle 5263 * @param conn_interval_min (unit: 1.25ms) 5264 * @param conn_interval_max (unit: 1.25ms) 5265 * @param conn_latency 5266 * @param supervision_timeout (unit: 10ms) 5267 * @returns 0 if ok 5268 */ 5269 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5270 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5271 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5272 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5273 connection->le_conn_interval_min = conn_interval_min; 5274 connection->le_conn_interval_max = conn_interval_max; 5275 connection->le_conn_latency = conn_latency; 5276 connection->le_supervision_timeout = supervision_timeout; 5277 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5278 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5279 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5280 return 0; 5281 } 5282 5283 #ifdef ENABLE_LE_PERIPHERAL 5284 5285 /** 5286 * @brief Set Advertisement Data 5287 * @param advertising_data_length 5288 * @param advertising_data (max 31 octets) 5289 * @note data is not copied, pointer has to stay valid 5290 */ 5291 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5292 hci_stack->le_advertisements_data_len = advertising_data_length; 5293 hci_stack->le_advertisements_data = advertising_data; 5294 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5295 hci_run(); 5296 } 5297 5298 /** 5299 * @brief Set Scan Response Data 5300 * @param advertising_data_length 5301 * @param advertising_data (max 31 octets) 5302 * @note data is not copied, pointer has to stay valid 5303 */ 5304 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5305 hci_stack->le_scan_response_data_len = scan_response_data_length; 5306 hci_stack->le_scan_response_data = scan_response_data; 5307 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5308 hci_run(); 5309 } 5310 5311 /** 5312 * @brief Set Advertisement Parameters 5313 * @param adv_int_min 5314 * @param adv_int_max 5315 * @param adv_type 5316 * @param direct_address_type 5317 * @param direct_address 5318 * @param channel_map 5319 * @param filter_policy 5320 * 5321 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5322 */ 5323 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5324 uint8_t direct_address_typ, bd_addr_t direct_address, 5325 uint8_t channel_map, uint8_t filter_policy) { 5326 5327 hci_stack->le_advertisements_interval_min = adv_int_min; 5328 hci_stack->le_advertisements_interval_max = adv_int_max; 5329 hci_stack->le_advertisements_type = adv_type; 5330 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5331 hci_stack->le_advertisements_channel_map = channel_map; 5332 hci_stack->le_advertisements_filter_policy = filter_policy; 5333 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5334 6); 5335 5336 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5337 hci_run(); 5338 } 5339 5340 /** 5341 * @brief Enable/Disable Advertisements 5342 * @param enabled 5343 */ 5344 void gap_advertisements_enable(int enabled){ 5345 hci_stack->le_advertisements_enabled = enabled != 0; 5346 hci_update_advertisements_enabled_for_current_roles(); 5347 hci_run(); 5348 } 5349 5350 #endif 5351 5352 void hci_le_set_own_address_type(uint8_t own_address_type){ 5353 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5354 if (own_address_type == hci_stack->le_own_addr_type) return; 5355 hci_stack->le_own_addr_type = own_address_type; 5356 5357 #ifdef ENABLE_LE_PERIPHERAL 5358 // update advertisement parameters, too 5359 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5360 hci_run(); 5361 #endif 5362 #ifdef ENABLE_LE_CENTRAL 5363 // note: we don't update scan parameters or modify ongoing connection attempts 5364 #endif 5365 } 5366 5367 #endif 5368 5369 uint8_t gap_disconnect(hci_con_handle_t handle){ 5370 hci_connection_t * conn = hci_connection_for_handle(handle); 5371 if (!conn){ 5372 hci_emit_disconnection_complete(handle, 0); 5373 return 0; 5374 } 5375 // ignore if already disconnected 5376 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5377 return 0; 5378 } 5379 conn->state = SEND_DISCONNECT; 5380 hci_run(); 5381 return 0; 5382 } 5383 5384 int gap_read_rssi(hci_con_handle_t con_handle){ 5385 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5386 if (hci_connection == NULL) return 0; 5387 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5388 hci_run(); 5389 return 1; 5390 } 5391 5392 /** 5393 * @brief Get connection type 5394 * @param con_handle 5395 * @result connection_type 5396 */ 5397 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5398 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5399 if (!conn) return GAP_CONNECTION_INVALID; 5400 switch (conn->address_type){ 5401 case BD_ADDR_TYPE_LE_PUBLIC: 5402 case BD_ADDR_TYPE_LE_RANDOM: 5403 return GAP_CONNECTION_LE; 5404 case BD_ADDR_TYPE_SCO: 5405 return GAP_CONNECTION_SCO; 5406 case BD_ADDR_TYPE_ACL: 5407 return GAP_CONNECTION_ACL; 5408 default: 5409 return GAP_CONNECTION_INVALID; 5410 } 5411 } 5412 5413 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5414 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5415 if (!conn) return HCI_ROLE_INVALID; 5416 return (hci_role_t) conn->role; 5417 } 5418 5419 5420 #ifdef ENABLE_CLASSIC 5421 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5422 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5423 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5424 conn->request_role = role; 5425 hci_run(); 5426 return ERROR_CODE_SUCCESS; 5427 } 5428 #endif 5429 5430 #ifdef ENABLE_BLE 5431 5432 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){ 5433 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5434 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5435 5436 conn->le_phy_update_all_phys = all_phys; 5437 conn->le_phy_update_tx_phys = tx_phys; 5438 conn->le_phy_update_rx_phys = rx_phys; 5439 conn->le_phy_update_phy_options = phy_options; 5440 5441 hci_run(); 5442 5443 return 0; 5444 } 5445 5446 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5447 // check if already in list 5448 btstack_linked_list_iterator_t it; 5449 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5450 while (btstack_linked_list_iterator_has_next(&it)) { 5451 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5452 if (entry->address_type != address_type) { 5453 continue; 5454 } 5455 if (memcmp(entry->address, address, 6) != 0) { 5456 continue; 5457 } 5458 // disallow if already scheduled to add 5459 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5460 return ERROR_CODE_COMMAND_DISALLOWED; 5461 } 5462 // still on controller, but scheduled to remove -> re-add 5463 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5464 return ERROR_CODE_SUCCESS; 5465 } 5466 // alloc and add to list 5467 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5468 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5469 entry->address_type = address_type; 5470 (void)memcpy(entry->address, address, 6); 5471 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5472 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5473 return ERROR_CODE_SUCCESS; 5474 } 5475 5476 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5477 btstack_linked_list_iterator_t it; 5478 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5479 while (btstack_linked_list_iterator_has_next(&it)){ 5480 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5481 if (entry->address_type != address_type) { 5482 continue; 5483 } 5484 if (memcmp(entry->address, address, 6) != 0) { 5485 continue; 5486 } 5487 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5488 // remove from controller if already present 5489 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5490 } else { 5491 // directly remove entry from whitelist 5492 btstack_linked_list_iterator_remove(&it); 5493 btstack_memory_whitelist_entry_free(entry); 5494 } 5495 return ERROR_CODE_SUCCESS; 5496 } 5497 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5498 } 5499 5500 static void hci_whitelist_clear(void){ 5501 btstack_linked_list_iterator_t it; 5502 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5503 while (btstack_linked_list_iterator_has_next(&it)){ 5504 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5505 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5506 // remove from controller if already present 5507 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5508 continue; 5509 } 5510 // directly remove entry from whitelist 5511 btstack_linked_list_iterator_remove(&it); 5512 btstack_memory_whitelist_entry_free(entry); 5513 } 5514 } 5515 5516 /** 5517 * @brief Clear Whitelist 5518 * @returns 0 if ok 5519 */ 5520 uint8_t gap_whitelist_clear(void){ 5521 hci_whitelist_clear(); 5522 hci_run(); 5523 return ERROR_CODE_SUCCESS; 5524 } 5525 5526 /** 5527 * @brief Add Device to Whitelist 5528 * @param address_typ 5529 * @param address 5530 * @returns 0 if ok 5531 */ 5532 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5533 uint8_t status = hci_whitelist_add(address_type, address); 5534 if (status){ 5535 return status; 5536 } 5537 hci_run(); 5538 return ERROR_CODE_SUCCESS; 5539 } 5540 5541 /** 5542 * @brief Remove Device from Whitelist 5543 * @param address_typ 5544 * @param address 5545 * @returns 0 if ok 5546 */ 5547 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5548 uint8_t status = hci_whitelist_remove(address_type, address); 5549 if (status){ 5550 return status; 5551 } 5552 hci_run(); 5553 return ERROR_CODE_SUCCESS; 5554 } 5555 5556 #ifdef ENABLE_LE_CENTRAL 5557 /** 5558 * @brief Connect with Whitelist 5559 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5560 * @returns - if ok 5561 */ 5562 uint8_t gap_connect_with_whitelist(void){ 5563 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5564 return ERROR_CODE_COMMAND_DISALLOWED; 5565 } 5566 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5567 hci_run(); 5568 return ERROR_CODE_SUCCESS; 5569 } 5570 5571 /** 5572 * @brief Auto Connection Establishment - Start Connecting to device 5573 * @param address_typ 5574 * @param address 5575 * @returns 0 if ok 5576 */ 5577 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5578 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5579 return ERROR_CODE_COMMAND_DISALLOWED; 5580 } 5581 5582 uint8_t status = hci_whitelist_add(address_type, address); 5583 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5584 return status; 5585 } 5586 5587 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5588 5589 hci_run(); 5590 return ERROR_CODE_SUCCESS; 5591 } 5592 5593 /** 5594 * @brief Auto Connection Establishment - Stop Connecting to device 5595 * @param address_typ 5596 * @param address 5597 * @returns 0 if ok 5598 */ 5599 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5600 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5601 return ERROR_CODE_COMMAND_DISALLOWED; 5602 } 5603 5604 hci_whitelist_remove(address_type, address); 5605 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5606 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5607 } 5608 hci_run(); 5609 return 0; 5610 } 5611 5612 /** 5613 * @brief Auto Connection Establishment - Stop everything 5614 * @note Convenience function to stop all active auto connection attempts 5615 */ 5616 uint8_t gap_auto_connection_stop_all(void){ 5617 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5618 return ERROR_CODE_COMMAND_DISALLOWED; 5619 } 5620 hci_whitelist_clear(); 5621 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5622 hci_run(); 5623 return ERROR_CODE_SUCCESS; 5624 } 5625 5626 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5627 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5628 if (!conn) return 0; 5629 return conn->le_connection_interval; 5630 } 5631 #endif 5632 #endif 5633 5634 #ifdef ENABLE_CLASSIC 5635 /** 5636 * @brief Set Extended Inquiry Response data 5637 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5638 * @note has to be done before stack starts up 5639 */ 5640 void gap_set_extended_inquiry_response(const uint8_t * data){ 5641 hci_stack->eir_data = data; 5642 } 5643 5644 /** 5645 * @brief Start GAP Classic Inquiry 5646 * @param duration in 1.28s units 5647 * @return 0 if ok 5648 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5649 */ 5650 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5651 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5652 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5653 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5654 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5655 } 5656 hci_stack->inquiry_state = duration_in_1280ms_units; 5657 hci_run(); 5658 return 0; 5659 } 5660 5661 /** 5662 * @brief Stop GAP Classic Inquiry 5663 * @returns 0 if ok 5664 */ 5665 int gap_inquiry_stop(void){ 5666 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5667 // emit inquiry complete event, before it even started 5668 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5669 hci_emit_event(event, sizeof(event), 1); 5670 return 0; 5671 } 5672 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5673 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5674 hci_run(); 5675 return 0; 5676 } 5677 5678 5679 /** 5680 * @brief Remote Name Request 5681 * @param addr 5682 * @param page_scan_repetition_mode 5683 * @param clock_offset only used when bit 15 is set 5684 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5685 */ 5686 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5687 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5688 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5689 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5690 hci_stack->remote_name_clock_offset = clock_offset; 5691 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5692 hci_run(); 5693 return 0; 5694 } 5695 5696 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5697 hci_stack->gap_pairing_state = state; 5698 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5699 hci_run(); 5700 return 0; 5701 } 5702 5703 /** 5704 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5705 * @param addr 5706 * @param pin_data 5707 * @param pin_len 5708 * @return 0 if ok 5709 */ 5710 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5711 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5712 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5713 hci_stack->gap_pairing_pin_len = pin_len; 5714 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5715 } 5716 5717 /** 5718 * @brief Legacy Pairing Pin Code Response 5719 * @param addr 5720 * @param pin 5721 * @return 0 if ok 5722 */ 5723 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5724 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5725 } 5726 5727 /** 5728 * @brief Abort Legacy Pairing 5729 * @param addr 5730 * @param pin 5731 * @return 0 if ok 5732 */ 5733 int gap_pin_code_negative(bd_addr_t addr){ 5734 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5735 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5736 } 5737 5738 /** 5739 * @brief SSP Passkey Response 5740 * @param addr 5741 * @param passkey 5742 * @return 0 if ok 5743 */ 5744 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5745 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5746 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5747 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5748 } 5749 5750 /** 5751 * @brief Abort SSP Passkey Entry/Pairing 5752 * @param addr 5753 * @param pin 5754 * @return 0 if ok 5755 */ 5756 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5757 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5758 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5759 } 5760 5761 /** 5762 * @brief Accept SSP Numeric Comparison 5763 * @param addr 5764 * @param passkey 5765 * @return 0 if ok 5766 */ 5767 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5768 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5769 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5770 } 5771 5772 /** 5773 * @brief Abort SSP Numeric Comparison/Pairing 5774 * @param addr 5775 * @param pin 5776 * @return 0 if ok 5777 */ 5778 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5779 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5780 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5781 } 5782 5783 /** 5784 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5785 * @param inquiry_mode see bluetooth_defines.h 5786 */ 5787 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5788 hci_stack->inquiry_mode = mode; 5789 } 5790 5791 /** 5792 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5793 */ 5794 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5795 hci_stack->sco_voice_setting = voice_setting; 5796 } 5797 5798 /** 5799 * @brief Get SCO Voice Setting 5800 * @return current voice setting 5801 */ 5802 uint16_t hci_get_sco_voice_setting(void){ 5803 return hci_stack->sco_voice_setting; 5804 } 5805 5806 static int hci_have_usb_transport(void){ 5807 if (!hci_stack->hci_transport) return 0; 5808 const char * transport_name = hci_stack->hci_transport->name; 5809 if (!transport_name) return 0; 5810 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5811 } 5812 5813 /** @brief Get SCO packet length for current SCO Voice setting 5814 * @note Using SCO packets of the exact length is required for USB transfer 5815 * @return Length of SCO packets in bytes (not audio frames) 5816 */ 5817 int hci_get_sco_packet_length(void){ 5818 int sco_packet_length = 0; 5819 5820 #ifdef ENABLE_SCO_OVER_HCI 5821 5822 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5823 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5824 5825 if (hci_have_usb_transport()){ 5826 // see Core Spec for H2 USB Transfer. 5827 // 3 byte SCO header + 24 bytes per connection 5828 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5829 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5830 } else { 5831 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5832 sco_packet_length = 3 + 60 * multiplier; 5833 // assert that it still fits inside an SCO buffer 5834 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5835 sco_packet_length = 3 + 60; 5836 } 5837 } 5838 #endif 5839 return sco_packet_length; 5840 } 5841 5842 /** 5843 * @brief Sets the master/slave policy 5844 * @param policy (0: attempt to become master, 1: let connecting device decide) 5845 */ 5846 void hci_set_master_slave_policy(uint8_t policy){ 5847 hci_stack->master_slave_policy = policy; 5848 } 5849 5850 #endif 5851 5852 HCI_STATE hci_get_state(void){ 5853 return hci_stack->state; 5854 } 5855 5856 #ifdef ENABLE_CLASSIC 5857 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5858 hci_stack->gap_classic_accept_callback = accept_callback; 5859 } 5860 #endif 5861 5862 /** 5863 * @brief Set callback for Bluetooth Hardware Error 5864 */ 5865 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5866 hci_stack->hardware_error_callback = fn; 5867 } 5868 5869 void hci_disconnect_all(void){ 5870 btstack_linked_list_iterator_t it; 5871 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5872 while (btstack_linked_list_iterator_has_next(&it)){ 5873 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5874 if (con->state == SENT_DISCONNECT) continue; 5875 con->state = SEND_DISCONNECT; 5876 } 5877 hci_run(); 5878 } 5879 5880 uint16_t hci_get_manufacturer(void){ 5881 return hci_stack->manufacturer; 5882 } 5883 5884 #ifdef ENABLE_BLE 5885 5886 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5887 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5888 if (!hci_con) return NULL; 5889 return &hci_con->sm_connection; 5890 } 5891 5892 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5893 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5894 5895 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5896 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5897 if (hci_connection == NULL) return 0; 5898 if (hci_is_le_connection(hci_connection)){ 5899 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5900 if (sm_conn->sm_connection_encrypted) { 5901 return sm_conn->sm_actual_encryption_key_size; 5902 } 5903 } 5904 #ifdef ENABLE_CLASSIC 5905 else { 5906 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5907 return hci_connection->encryption_key_size; 5908 } 5909 } 5910 #endif 5911 return 0; 5912 } 5913 5914 int gap_authenticated(hci_con_handle_t con_handle){ 5915 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5916 if (hci_connection == NULL) return 0; 5917 5918 switch (hci_connection->address_type){ 5919 case BD_ADDR_TYPE_LE_PUBLIC: 5920 case BD_ADDR_TYPE_LE_RANDOM: 5921 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5922 return hci_connection->sm_connection.sm_connection_authenticated; 5923 #ifdef ENABLE_CLASSIC 5924 case BD_ADDR_TYPE_SCO: 5925 case BD_ADDR_TYPE_ACL: 5926 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5927 #endif 5928 default: 5929 return 0; 5930 } 5931 } 5932 5933 int gap_secure_connection(hci_con_handle_t con_handle){ 5934 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5935 if (hci_connection == NULL) return 0; 5936 5937 switch (hci_connection->address_type){ 5938 case BD_ADDR_TYPE_LE_PUBLIC: 5939 case BD_ADDR_TYPE_LE_RANDOM: 5940 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5941 return hci_connection->sm_connection.sm_connection_sc; 5942 #ifdef ENABLE_CLASSIC 5943 case BD_ADDR_TYPE_SCO: 5944 case BD_ADDR_TYPE_ACL: 5945 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5946 #endif 5947 default: 5948 return 0; 5949 } 5950 } 5951 5952 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5953 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5954 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5955 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5956 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5957 return sm_conn->sm_connection_authorization_state; 5958 } 5959 #endif 5960 5961 #ifdef ENABLE_CLASSIC 5962 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){ 5963 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5964 if (!conn) return GAP_CONNECTION_INVALID; 5965 conn->sniff_min_interval = sniff_min_interval; 5966 conn->sniff_max_interval = sniff_max_interval; 5967 conn->sniff_attempt = sniff_attempt; 5968 conn->sniff_timeout = sniff_timeout; 5969 hci_run(); 5970 return 0; 5971 } 5972 5973 /** 5974 * @brief Exit Sniff mode 5975 * @param con_handle 5976 @ @return 0 if ok 5977 */ 5978 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5979 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5980 if (!conn) return GAP_CONNECTION_INVALID; 5981 conn->sniff_min_interval = 0xffff; 5982 hci_run(); 5983 return 0; 5984 } 5985 #endif 5986 5987 void hci_halting_defer(void){ 5988 if (hci_stack->state != HCI_STATE_HALTING) return; 5989 switch (hci_stack->substate){ 5990 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5991 case HCI_HALTING_CLOSE: 5992 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5993 break; 5994 default: 5995 break; 5996 } 5997 } 5998 5999 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6000 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6001 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6002 if (le_device_db_index >= le_device_db_max_count()) return; 6003 uint8_t offset = le_device_db_index >> 3; 6004 uint8_t mask = 1 << (le_device_db_index & 7); 6005 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6006 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6007 // note: go back to remove entries, otherwise, a remove + add will skip the add 6008 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6009 } 6010 } 6011 6012 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6013 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6014 if (le_device_db_index >= le_device_db_max_count()) return; 6015 uint8_t offset = le_device_db_index >> 3; 6016 uint8_t mask = 1 << (le_device_db_index & 7); 6017 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6018 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6019 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6020 } 6021 } 6022 6023 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6024 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6025 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6026 } 6027 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6028 // restart le resolving list update 6029 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6030 } 6031 return ERROR_CODE_SUCCESS; 6032 } 6033 #endif 6034 6035 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6036 void hci_setup_test_connections_fuzz(void){ 6037 hci_connection_t * conn; 6038 6039 // default address: 66:55:44:33:00:01 6040 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6041 6042 // setup Controller info 6043 hci_stack->num_cmd_packets = 255; 6044 hci_stack->acl_packets_total_num = 255; 6045 6046 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6047 addr[5] = 0x01; 6048 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6049 conn->con_handle = addr[5]; 6050 conn->role = HCI_ROLE_SLAVE; 6051 conn->state = RECEIVED_CONNECTION_REQUEST; 6052 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6053 6054 // setup incoming Classic SCO connection with con handle 0x0002 6055 addr[5] = 0x02; 6056 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6057 conn->con_handle = addr[5]; 6058 conn->role = HCI_ROLE_SLAVE; 6059 conn->state = RECEIVED_CONNECTION_REQUEST; 6060 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6061 6062 // setup ready Classic ACL connection with con handle 0x0003 6063 addr[5] = 0x03; 6064 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6065 conn->con_handle = addr[5]; 6066 conn->role = HCI_ROLE_SLAVE; 6067 conn->state = OPEN; 6068 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6069 6070 // setup ready Classic SCO connection with con handle 0x0004 6071 addr[5] = 0x04; 6072 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6073 conn->con_handle = addr[5]; 6074 conn->role = HCI_ROLE_SLAVE; 6075 conn->state = OPEN; 6076 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6077 6078 // setup ready LE ACL connection with con handle 0x005 and public address 6079 addr[5] = 0x05; 6080 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6081 conn->con_handle = addr[5]; 6082 conn->role = HCI_ROLE_SLAVE; 6083 conn->state = OPEN; 6084 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6085 } 6086 6087 void hci_free_connections_fuzz(void){ 6088 btstack_linked_list_iterator_t it; 6089 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6090 while (btstack_linked_list_iterator_has_next(&it)){ 6091 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6092 btstack_linked_list_iterator_remove(&it); 6093 btstack_memory_hci_connection_free(con); 6094 } 6095 } 6096 void hci_simulate_working_fuzz(void){ 6097 hci_init_done(); 6098 hci_stack->num_cmd_packets = 255; 6099 } 6100 #endif 6101