1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->role = HCI_ROLE_INVALID; 199 conn->address_type = addr_type; 200 conn->con_handle = 0xffff; 201 conn->authentication_flags = AUTH_FLAGS_NONE; 202 conn->bonding_flags = 0; 203 conn->requested_security_level = LEVEL_0; 204 #ifdef ENABLE_CLASSIC 205 conn->request_role = HCI_ROLE_INVALID; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 222 return conn; 223 } 224 225 226 /** 227 * get le connection parameter range 228 * 229 * @return le connection parameter range struct 230 */ 231 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 232 *range = hci_stack->le_connection_parameter_range; 233 } 234 235 /** 236 * set le connection parameter range 237 * 238 */ 239 240 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 241 hci_stack->le_connection_parameter_range = *range; 242 } 243 244 /** 245 * @brief Test if connection parameters are inside in existing rage 246 * @param conn_interval_min (unit: 1.25ms) 247 * @param conn_interval_max (unit: 1.25ms) 248 * @param conn_latency 249 * @param supervision_timeout (unit: 10ms) 250 * @returns 1 if included 251 */ 252 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 253 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 254 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 255 256 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 257 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 258 259 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 260 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 261 262 return 1; 263 } 264 265 /** 266 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 267 * @note: default: 1 268 * @param max_peripheral_connections 269 */ 270 #ifdef ENABLE_LE_PERIPHERAL 271 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 272 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 273 } 274 #endif 275 276 /** 277 * get hci connections iterator 278 * 279 * @return hci connections iterator 280 */ 281 282 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 283 btstack_linked_list_iterator_init(it, &hci_stack->connections); 284 } 285 286 /** 287 * get connection for a given handle 288 * 289 * @return connection OR NULL, if not found 290 */ 291 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 296 if ( item->con_handle == con_handle ) { 297 return item; 298 } 299 } 300 return NULL; 301 } 302 303 /** 304 * get connection for given address 305 * 306 * @return connection OR NULL, if not found 307 */ 308 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 313 if (connection->address_type != addr_type) continue; 314 if (memcmp(addr, connection->address, 6) != 0) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 321 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 322 } 323 324 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 326 } 327 328 #ifdef ENABLE_CLASSIC 329 330 #ifdef ENABLE_SCO_OVER_HCI 331 static int hci_number_sco_connections(void){ 332 int connections = 0; 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 338 connections++; 339 } 340 return connections; 341 } 342 #endif 343 344 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 346 #ifdef HAVE_EMBEDDED_TICK 347 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 348 // connections might be timed out 349 hci_emit_l2cap_check_timeout(connection); 350 } 351 #else 352 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 353 // connections might be timed out 354 hci_emit_l2cap_check_timeout(connection); 355 } 356 #endif 357 } 358 359 static void hci_connection_timestamp(hci_connection_t *connection){ 360 #ifdef HAVE_EMBEDDED_TICK 361 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 362 #else 363 connection->timestamp = btstack_run_loop_get_time_ms(); 364 #endif 365 } 366 367 /** 368 * add authentication flags and reset timer 369 * @note: assumes classic connection 370 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 371 */ 372 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 373 bd_addr_t addr; 374 reverse_bd_addr(bd_addr, addr); 375 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 376 if (conn) { 377 connectionSetAuthenticationFlags(conn, flags); 378 hci_connection_timestamp(conn); 379 } 380 } 381 382 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 383 hci_connection_t * conn = hci_connection_for_handle(handle); 384 if (!conn) return 0; 385 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 386 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 387 return 0; 388 } 389 390 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 393 hci_stack->link_key_db->delete_link_key(addr); 394 } 395 396 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 397 if (!hci_stack->link_key_db) return; 398 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 399 hci_stack->link_key_db->put_link_key(addr, link_key, type); 400 } 401 402 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 403 if (!hci_stack->link_key_db) return false; 404 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 405 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 406 return result; 407 } 408 409 void gap_delete_all_link_keys(void){ 410 bd_addr_t addr; 411 link_key_t link_key; 412 link_key_type_t type; 413 btstack_link_key_iterator_t it; 414 int ok = gap_link_key_iterator_init(&it); 415 if (!ok) { 416 log_error("could not initialize iterator"); 417 return; 418 } 419 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 420 gap_drop_link_key_for_bd_addr(addr); 421 } 422 gap_link_key_iterator_done(&it); 423 } 424 425 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return 0; 427 if (!hci_stack->link_key_db->iterator_init) return 0; 428 return hci_stack->link_key_db->iterator_init(it); 429 } 430 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 431 if (!hci_stack->link_key_db) return 0; 432 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 433 } 434 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 435 if (!hci_stack->link_key_db) return; 436 hci_stack->link_key_db->iterator_done(it); 437 } 438 #endif 439 440 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 441 switch (address_type){ 442 case BD_ADDR_TYPE_LE_PUBLIC: 443 case BD_ADDR_TYPE_LE_RANDOM: 444 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 445 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 446 return true; 447 default: 448 return false; 449 } 450 } 451 452 static int hci_is_le_connection(hci_connection_t * connection){ 453 return hci_is_le_connection_type(connection->address_type); 454 } 455 456 /** 457 * count connections 458 */ 459 static int nr_hci_connections(void){ 460 int count = 0; 461 btstack_linked_item_t *it; 462 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 463 count++; 464 } 465 return count; 466 } 467 468 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 469 470 unsigned int num_packets_sent_classic = 0; 471 unsigned int num_packets_sent_le = 0; 472 473 btstack_linked_item_t *it; 474 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 475 hci_connection_t * connection = (hci_connection_t *) it; 476 if (hci_is_le_connection(connection)){ 477 num_packets_sent_le += connection->num_packets_sent; 478 } 479 if (connection->address_type == BD_ADDR_TYPE_ACL){ 480 num_packets_sent_classic += connection->num_packets_sent; 481 } 482 } 483 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 484 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 485 int free_slots_le = 0; 486 487 if (free_slots_classic < 0){ 488 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 489 return 0; 490 } 491 492 if (hci_stack->le_acl_packets_total_num){ 493 // if we have LE slots, they are used 494 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 495 if (free_slots_le < 0){ 496 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 497 return 0; 498 } 499 } else { 500 // otherwise, classic slots are used for LE, too 501 free_slots_classic -= num_packets_sent_le; 502 if (free_slots_classic < 0){ 503 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 504 return 0; 505 } 506 } 507 508 switch (address_type){ 509 case BD_ADDR_TYPE_UNKNOWN: 510 log_error("hci_number_free_acl_slots: unknown address type"); 511 return 0; 512 513 case BD_ADDR_TYPE_ACL: 514 return free_slots_classic; 515 516 default: 517 if (hci_stack->le_acl_packets_total_num){ 518 return free_slots_le; 519 } 520 return free_slots_classic; 521 } 522 } 523 524 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 525 // get connection type 526 hci_connection_t * connection = hci_connection_for_handle(con_handle); 527 if (!connection){ 528 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 529 return 0; 530 } 531 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 532 } 533 534 #ifdef ENABLE_CLASSIC 535 static int hci_number_free_sco_slots(void){ 536 unsigned int num_sco_packets_sent = 0; 537 btstack_linked_item_t *it; 538 if (hci_stack->synchronous_flow_control_enabled){ 539 // explicit flow control 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 num_sco_packets_sent += connection->num_packets_sent; 544 } 545 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 546 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 547 return 0; 548 } 549 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 550 } else { 551 // implicit flow control -- TODO 552 int num_ready = 0; 553 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 554 hci_connection_t * connection = (hci_connection_t *) it; 555 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 556 if (connection->sco_tx_ready == 0) continue; 557 num_ready++; 558 } 559 return num_ready; 560 } 561 } 562 #endif 563 564 // only used to send HCI Host Number Completed Packets 565 static int hci_can_send_comand_packet_transport(void){ 566 if (hci_stack->hci_packet_buffer_reserved) return 0; 567 568 // check for async hci transport implementations 569 if (hci_stack->hci_transport->can_send_packet_now){ 570 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 571 return 0; 572 } 573 } 574 return 1; 575 } 576 577 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 578 int hci_can_send_command_packet_now(void){ 579 if (hci_can_send_comand_packet_transport() == 0) return 0; 580 return hci_stack->num_cmd_packets > 0u; 581 } 582 583 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 584 // check for async hci transport implementations 585 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 586 return hci_stack->hci_transport->can_send_packet_now(packet_type); 587 } 588 589 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 590 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 591 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 592 } 593 594 int hci_can_send_acl_le_packet_now(void){ 595 if (hci_stack->hci_packet_buffer_reserved) return 0; 596 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 597 } 598 599 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 600 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 601 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 602 } 603 604 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_acl_packet_now(con_handle); 607 } 608 609 #ifdef ENABLE_CLASSIC 610 int hci_can_send_acl_classic_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 613 } 614 615 int hci_can_send_prepared_sco_packet_now(void){ 616 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 617 if (hci_have_usb_transport()){ 618 return hci_stack->sco_can_send_now; 619 } else { 620 return hci_number_free_sco_slots() > 0; 621 } 622 } 623 624 int hci_can_send_sco_packet_now(void){ 625 if (hci_stack->hci_packet_buffer_reserved) return 0; 626 return hci_can_send_prepared_sco_packet_now(); 627 } 628 629 void hci_request_sco_can_send_now_event(void){ 630 hci_stack->sco_waiting_for_can_send_now = 1; 631 hci_notify_if_sco_can_send_now(); 632 } 633 #endif 634 635 // used for internal checks in l2cap.c 636 int hci_is_packet_buffer_reserved(void){ 637 return hci_stack->hci_packet_buffer_reserved; 638 } 639 640 // reserves outgoing packet buffer. @returns 1 if successful 641 int hci_reserve_packet_buffer(void){ 642 if (hci_stack->hci_packet_buffer_reserved) { 643 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 644 return 0; 645 } 646 hci_stack->hci_packet_buffer_reserved = 1; 647 return 1; 648 } 649 650 void hci_release_packet_buffer(void){ 651 hci_stack->hci_packet_buffer_reserved = 0; 652 } 653 654 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 655 static int hci_transport_synchronous(void){ 656 return hci_stack->hci_transport->can_send_packet_now == NULL; 657 } 658 659 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 660 661 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 662 663 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 664 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 665 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 666 max_acl_data_packet_length = hci_stack->le_data_packets_length; 667 } 668 669 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 670 if (hci_is_le_connection(connection)){ 671 max_acl_data_packet_length = connection->le_max_tx_octets; 672 } 673 #endif 674 675 log_debug("hci_send_acl_packet_fragments entered"); 676 677 int err; 678 // multiple packets could be send on a synchronous HCI transport 679 while (true){ 680 681 log_debug("hci_send_acl_packet_fragments loop entered"); 682 683 // get current data 684 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 685 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 686 bool more_fragments = false; 687 688 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 689 if (current_acl_data_packet_length > max_acl_data_packet_length){ 690 more_fragments = true; 691 current_acl_data_packet_length = max_acl_data_packet_length; 692 } 693 694 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 695 if (acl_header_pos > 0u){ 696 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 697 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 698 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 699 } 700 701 // update header len 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 703 704 // count packet 705 connection->num_packets_sent++; 706 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 707 708 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 709 if (more_fragments){ 710 // update start of next fragment to send 711 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 712 } else { 713 // done 714 hci_stack->acl_fragmentation_pos = 0; 715 hci_stack->acl_fragmentation_total_size = 0; 716 } 717 718 // send packet 719 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 720 const int size = current_acl_data_packet_length + 4; 721 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 722 hci_stack->acl_fragmentation_tx_active = 1; 723 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 724 725 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 726 727 // done yet? 728 if (!more_fragments) break; 729 730 // can send more? 731 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 732 } 733 734 log_debug("hci_send_acl_packet_fragments loop over"); 735 736 // release buffer now for synchronous transport 737 if (hci_transport_synchronous()){ 738 hci_stack->acl_fragmentation_tx_active = 0; 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 } 742 743 return err; 744 } 745 746 // pre: caller has reserved the packet buffer 747 int hci_send_acl_packet_buffer(int size){ 748 749 // log_info("hci_send_acl_packet_buffer size %u", size); 750 751 if (!hci_stack->hci_packet_buffer_reserved) { 752 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 753 return 0; 754 } 755 756 uint8_t * packet = hci_stack->hci_packet_buffer; 757 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 758 759 // check for free places on Bluetooth module 760 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 761 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return BTSTACK_ACL_BUFFERS_FULL; 765 } 766 767 hci_connection_t *connection = hci_connection_for_handle( con_handle); 768 if (!connection) { 769 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return 0; 773 } 774 775 #ifdef ENABLE_CLASSIC 776 hci_connection_timestamp(connection); 777 #endif 778 779 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 780 781 // setup data 782 hci_stack->acl_fragmentation_total_size = size; 783 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 784 785 return hci_send_acl_packet_fragments(connection); 786 } 787 788 #ifdef ENABLE_CLASSIC 789 // pre: caller has reserved the packet buffer 790 int hci_send_sco_packet_buffer(int size){ 791 792 // log_info("hci_send_acl_packet_buffer size %u", size); 793 794 if (!hci_stack->hci_packet_buffer_reserved) { 795 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 796 return 0; 797 } 798 799 uint8_t * packet = hci_stack->hci_packet_buffer; 800 801 // skip checks in loopback mode 802 if (!hci_stack->loopback_mode){ 803 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 804 805 // check for free places on Bluetooth module 806 if (!hci_can_send_prepared_sco_packet_now()) { 807 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 808 hci_release_packet_buffer(); 809 hci_emit_transport_packet_sent(); 810 return BTSTACK_ACL_BUFFERS_FULL; 811 } 812 813 // track send packet in connection struct 814 hci_connection_t *connection = hci_connection_for_handle( con_handle); 815 if (!connection) { 816 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return 0; 820 } 821 822 if (hci_have_usb_transport()){ 823 // token used 824 hci_stack->sco_can_send_now = 0; 825 } else { 826 if (hci_stack->synchronous_flow_control_enabled){ 827 connection->num_packets_sent++; 828 } else { 829 connection->sco_tx_ready--; 830 } 831 } 832 } 833 834 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 835 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 836 837 if (hci_transport_synchronous()){ 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 } 841 842 return err; 843 } 844 #endif 845 846 static void acl_handler(uint8_t *packet, uint16_t size){ 847 848 // get info 849 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 850 hci_connection_t *conn = hci_connection_for_handle(con_handle); 851 uint8_t acl_flags = READ_ACL_FLAGS(packet); 852 uint16_t acl_length = READ_ACL_LENGTH(packet); 853 854 // ignore non-registered handle 855 if (!conn){ 856 log_error("acl_handler called with non-registered handle %u!" , con_handle); 857 return; 858 } 859 860 // assert packet is complete 861 if ((acl_length + 4u) != size){ 862 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 863 return; 864 } 865 866 #ifdef ENABLE_CLASSIC 867 // update idle timestamp 868 hci_connection_timestamp(conn); 869 #endif 870 871 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 872 hci_stack->host_completed_packets = 1; 873 conn->num_packets_completed++; 874 #endif 875 876 // handle different packet types 877 switch (acl_flags & 0x03u) { 878 879 case 0x01: // continuation fragment 880 881 // sanity checks 882 if (conn->acl_recombination_pos == 0u) { 883 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 884 return; 885 } 886 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 887 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 888 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 889 conn->acl_recombination_pos = 0; 890 return; 891 } 892 893 // append fragment payload (header already stored) 894 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 895 &packet[4], acl_length); 896 conn->acl_recombination_pos += acl_length; 897 898 // forward complete L2CAP packet if complete. 899 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 900 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 901 // reset recombination buffer 902 conn->acl_recombination_length = 0; 903 conn->acl_recombination_pos = 0; 904 } 905 break; 906 907 case 0x02: { // first fragment 908 909 // sanity check 910 if (conn->acl_recombination_pos) { 911 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 912 conn->acl_recombination_pos = 0; 913 } 914 915 // peek into L2CAP packet! 916 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 917 918 // compare fragment size to L2CAP packet size 919 if (acl_length >= (l2cap_length + 4u)){ 920 // forward fragment as L2CAP packet 921 hci_emit_acl_packet(packet, acl_length + 4u); 922 } else { 923 924 if (acl_length > HCI_ACL_BUFFER_SIZE){ 925 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 926 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 927 return; 928 } 929 930 // store first fragment and tweak acl length for complete package 931 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 932 packet, acl_length + 4u); 933 conn->acl_recombination_pos = acl_length + 4u; 934 conn->acl_recombination_length = l2cap_length; 935 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 936 } 937 break; 938 939 } 940 default: 941 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 942 return; 943 } 944 945 // execute main loop 946 hci_run(); 947 } 948 949 static void hci_shutdown_connection(hci_connection_t *conn){ 950 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 951 952 #ifdef ENABLE_CLASSIC 953 #ifdef ENABLE_SCO_OVER_HCI 954 int addr_type = conn->address_type; 955 #endif 956 #endif 957 958 btstack_run_loop_remove_timer(&conn->timeout); 959 960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 961 btstack_memory_hci_connection_free( conn ); 962 963 // now it's gone 964 hci_emit_nr_connections_changed(); 965 966 #ifdef ENABLE_CLASSIC 967 #ifdef ENABLE_SCO_OVER_HCI 968 // update SCO 969 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 971 } 972 #endif 973 #endif 974 } 975 976 #ifdef ENABLE_CLASSIC 977 978 static const uint16_t packet_type_sizes[] = { 979 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 980 HCI_ACL_DH1_SIZE, 0, 0, 0, 981 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 982 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 983 }; 984 static const uint8_t packet_type_feature_requirement_bit[] = { 985 0, // 3 slot packets 986 1, // 5 slot packets 987 25, // EDR 2 mpbs 988 26, // EDR 3 mbps 989 39, // 3 slot EDR packts 990 40, // 5 slot EDR packet 991 }; 992 static const uint16_t packet_type_feature_packet_mask[] = { 993 0x0f00, // 3 slot packets 994 0xf000, // 5 slot packets 995 0x1102, // EDR 2 mpbs 996 0x2204, // EDR 3 mbps 997 0x0300, // 3 slot EDR packts 998 0x3000, // 5 slot EDR packet 999 }; 1000 1001 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1002 // enable packet types based on size 1003 uint16_t packet_types = 0; 1004 unsigned int i; 1005 for (i=0;i<16;i++){ 1006 if (packet_type_sizes[i] == 0) continue; 1007 if (packet_type_sizes[i] <= buffer_size){ 1008 packet_types |= 1 << i; 1009 } 1010 } 1011 // disable packet types due to missing local supported features 1012 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1013 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1014 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1015 if (feature_set) continue; 1016 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1017 packet_types &= ~packet_type_feature_packet_mask[i]; 1018 } 1019 // flip bits for "may not be used" 1020 packet_types ^= 0x3306; 1021 return packet_types; 1022 } 1023 1024 uint16_t hci_usable_acl_packet_types(void){ 1025 return hci_stack->packet_types; 1026 } 1027 #endif 1028 1029 uint8_t* hci_get_outgoing_packet_buffer(void){ 1030 // hci packet buffer is >= acl data packet length 1031 return hci_stack->hci_packet_buffer; 1032 } 1033 1034 uint16_t hci_max_acl_data_packet_length(void){ 1035 return hci_stack->acl_data_packet_length; 1036 } 1037 1038 #ifdef ENABLE_CLASSIC 1039 int hci_extended_sco_link_supported(void){ 1040 // No. 31, byte 3, bit 7 1041 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1042 } 1043 #endif 1044 1045 int hci_non_flushable_packet_boundary_flag_supported(void){ 1046 // No. 54, byte 6, bit 6 1047 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1048 } 1049 1050 static int gap_ssp_supported(void){ 1051 // No. 51, byte 6, bit 3 1052 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1053 } 1054 1055 static int hci_classic_supported(void){ 1056 #ifdef ENABLE_CLASSIC 1057 // No. 37, byte 4, bit 5, = No BR/EDR Support 1058 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1059 #else 1060 return 0; 1061 #endif 1062 } 1063 1064 static int hci_le_supported(void){ 1065 #ifdef ENABLE_BLE 1066 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1067 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1068 #else 1069 return 0; 1070 #endif 1071 } 1072 1073 #ifdef ENABLE_BLE 1074 1075 /** 1076 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1077 */ 1078 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1079 *addr_type = hci_stack->le_own_addr_type; 1080 if (hci_stack->le_own_addr_type){ 1081 (void)memcpy(addr, hci_stack->le_random_address, 6); 1082 } else { 1083 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1084 } 1085 } 1086 1087 #ifdef ENABLE_LE_CENTRAL 1088 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1089 1090 int offset = 3; 1091 int num_reports = packet[offset]; 1092 offset += 1; 1093 1094 int i; 1095 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1096 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1097 for (i=0; (i<num_reports) && (offset < size);i++){ 1098 // sanity checks on data_length: 1099 uint8_t data_length = packet[offset + 8]; 1100 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1101 if ((offset + 9u + data_length + 1u) > size) return; 1102 // setup event 1103 uint8_t event_size = 10u + data_length; 1104 int pos = 0; 1105 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1106 event[pos++] = event_size; 1107 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1108 offset += 8; 1109 pos += 8; 1110 event[pos++] = packet[offset + 1 + data_length]; // rssi 1111 event[pos++] = data_length; 1112 offset++; 1113 (void)memcpy(&event[pos], &packet[offset], data_length); 1114 pos += data_length; 1115 offset += data_length + 1u; // rssi 1116 hci_emit_event(event, pos, 1); 1117 } 1118 } 1119 #endif 1120 #endif 1121 1122 #ifdef ENABLE_BLE 1123 #ifdef ENABLE_LE_PERIPHERAL 1124 static void hci_update_advertisements_enabled_for_current_roles(void){ 1125 if (hci_stack->le_advertisements_enabled){ 1126 // get number of active le slave connections 1127 int num_slave_connections = 0; 1128 btstack_linked_list_iterator_t it; 1129 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1130 while (btstack_linked_list_iterator_has_next(&it)){ 1131 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1132 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1133 if (con->state != OPEN) continue; 1134 if (con->role != HCI_ROLE_SLAVE) continue; 1135 if (!hci_is_le_connection(con)) continue; 1136 num_slave_connections++; 1137 } 1138 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1139 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1140 } else { 1141 hci_stack->le_advertisements_enabled_for_current_roles = false; 1142 } 1143 } 1144 #endif 1145 #endif 1146 1147 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1148 1149 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1150 if (!hci_stack->config) return 0; 1151 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1152 // Limit baud rate for Broadcom chipsets to 3 mbps 1153 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1154 baud_rate = 3000000; 1155 } 1156 return baud_rate; 1157 } 1158 1159 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1160 UNUSED(ds); 1161 1162 switch (hci_stack->substate){ 1163 case HCI_INIT_W4_SEND_RESET: 1164 log_info("Resend HCI Reset"); 1165 hci_stack->substate = HCI_INIT_SEND_RESET; 1166 hci_stack->num_cmd_packets = 1; 1167 hci_run(); 1168 break; 1169 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1170 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1171 if (hci_stack->hci_transport->reset_link){ 1172 hci_stack->hci_transport->reset_link(); 1173 } 1174 1175 /* fall through */ 1176 1177 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1178 log_info("Resend HCI Reset - CSR Warm Boot"); 1179 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1180 hci_stack->num_cmd_packets = 1; 1181 hci_run(); 1182 break; 1183 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1184 if (hci_stack->hci_transport->set_baudrate){ 1185 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1186 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1187 hci_stack->hci_transport->set_baudrate(baud_rate); 1188 } 1189 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1190 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1191 if (hci_stack->hci_transport->reset_link){ 1192 log_info("Link Reset"); 1193 hci_stack->hci_transport->reset_link(); 1194 } 1195 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1196 hci_run(); 1197 } 1198 break; 1199 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1200 // otherwise continue 1201 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1202 hci_send_cmd(&hci_read_local_supported_commands); 1203 break; 1204 default: 1205 break; 1206 } 1207 } 1208 #endif 1209 1210 static void hci_initializing_next_state(void){ 1211 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1212 } 1213 1214 // assumption: hci_can_send_command_packet_now() == true 1215 static void hci_initializing_run(void){ 1216 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1217 switch (hci_stack->substate){ 1218 case HCI_INIT_SEND_RESET: 1219 hci_state_reset(); 1220 1221 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1222 // prepare reset if command complete not received in 100ms 1223 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1224 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1225 btstack_run_loop_add_timer(&hci_stack->timeout); 1226 #endif 1227 // send command 1228 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1229 hci_send_cmd(&hci_reset); 1230 break; 1231 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1232 hci_send_cmd(&hci_read_local_version_information); 1233 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1234 break; 1235 case HCI_INIT_SEND_READ_LOCAL_NAME: 1236 hci_send_cmd(&hci_read_local_name); 1237 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1238 break; 1239 1240 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1241 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1242 hci_state_reset(); 1243 // prepare reset if command complete not received in 100ms 1244 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1245 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1246 btstack_run_loop_add_timer(&hci_stack->timeout); 1247 // send command 1248 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1249 hci_send_cmd(&hci_reset); 1250 break; 1251 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1252 hci_state_reset(); 1253 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1254 hci_send_cmd(&hci_reset); 1255 break; 1256 case HCI_INIT_SEND_BAUD_CHANGE: { 1257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1258 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1259 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1260 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1261 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1262 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1263 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1264 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1265 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1266 btstack_run_loop_add_timer(&hci_stack->timeout); 1267 } 1268 break; 1269 } 1270 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1271 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1272 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1273 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1274 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1275 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1276 break; 1277 } 1278 case HCI_INIT_CUSTOM_INIT: 1279 // Custom initialization 1280 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1281 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1282 bool send_cmd = false; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = true; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = true; 1290 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1291 log_info("CSR Warm Boot"); 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1294 btstack_run_loop_add_timer(&hci_stack->timeout); 1295 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1296 && hci_stack->config 1297 && hci_stack->chipset 1298 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1299 && hci_stack->hci_transport->set_baudrate 1300 && hci_transport_uart_get_main_baud_rate()){ 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1302 } else { 1303 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1304 } 1305 break; 1306 default: 1307 break; 1308 } 1309 1310 if (send_cmd){ 1311 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1312 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1313 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1314 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1315 break; 1316 } 1317 log_info("Init script done"); 1318 1319 // Init script download on Broadcom chipsets causes: 1320 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1321 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1322 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1323 1324 // - baud rate to reset, restore UART baud rate if needed 1325 int need_baud_change = hci_stack->config 1326 && hci_stack->chipset 1327 && hci_stack->chipset->set_baudrate_command 1328 && hci_stack->hci_transport->set_baudrate 1329 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1330 if (need_baud_change) { 1331 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1332 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 1336 uint16_t bcm_delay_ms = 300; 1337 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1338 // -> Work around: wait here. 1339 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1340 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1341 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1342 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1343 btstack_run_loop_add_timer(&hci_stack->timeout); 1344 break; 1345 } 1346 } 1347 // otherwise continue 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_SET_BD_ADDR: 1352 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1353 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1354 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1355 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1356 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1357 break; 1358 #endif 1359 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1361 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1363 hci_send_cmd(&hci_read_local_supported_commands); 1364 break; 1365 case HCI_INIT_READ_BD_ADDR: 1366 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1367 hci_send_cmd(&hci_read_bd_addr); 1368 break; 1369 case HCI_INIT_READ_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1371 hci_send_cmd(&hci_read_buffer_size); 1372 break; 1373 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1375 hci_send_cmd(&hci_read_local_supported_features); 1376 break; 1377 1378 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1379 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1380 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1381 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1382 break; 1383 case HCI_INIT_HOST_BUFFER_SIZE: 1384 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1385 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1386 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1387 break; 1388 #endif 1389 1390 case HCI_INIT_SET_EVENT_MASK: 1391 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1392 if (hci_le_supported()){ 1393 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1394 } else { 1395 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1396 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1397 } 1398 break; 1399 1400 #ifdef ENABLE_CLASSIC 1401 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1403 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1404 break; 1405 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1407 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1408 break; 1409 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1411 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1412 break; 1413 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1415 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1416 break; 1417 case HCI_INIT_WRITE_LOCAL_NAME: { 1418 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1419 hci_reserve_packet_buffer(); 1420 uint8_t * packet = hci_stack->hci_packet_buffer; 1421 // construct HCI Command and send 1422 uint16_t opcode = hci_write_local_name.opcode; 1423 hci_stack->last_cmd_opcode = opcode; 1424 packet[0] = opcode & 0xff; 1425 packet[1] = opcode >> 8; 1426 packet[2] = DEVICE_NAME_LEN; 1427 memset(&packet[3], 0, DEVICE_NAME_LEN); 1428 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1429 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1430 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1431 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1432 // expand '00:00:00:00:00:00' in name with bd_addr 1433 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1434 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1435 break; 1436 } 1437 case HCI_INIT_WRITE_EIR_DATA: { 1438 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1439 hci_reserve_packet_buffer(); 1440 uint8_t * packet = hci_stack->hci_packet_buffer; 1441 // construct HCI Command in-place and send 1442 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1443 hci_stack->last_cmd_opcode = opcode; 1444 uint16_t offset = 0; 1445 packet[offset++] = opcode & 0xff; 1446 packet[offset++] = opcode >> 8; 1447 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1448 packet[offset++] = 0; // FEC not required 1449 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1450 if (hci_stack->eir_data){ 1451 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1452 ad_context_t context; 1453 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1454 uint8_t data_type = ad_iterator_get_data_type(&context); 1455 uint8_t size = ad_iterator_get_data_len(&context); 1456 const uint8_t *data = ad_iterator_get_data(&context); 1457 // copy item 1458 packet[offset++] = size + 1; 1459 packet[offset++] = data_type; 1460 memcpy(&packet[offset], data, size); 1461 // update name item 1462 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1463 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1464 } 1465 offset += size; 1466 } 1467 } else { 1468 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1469 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1470 packet[offset++] = bytes_to_copy + 1; 1471 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1472 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1473 // expand '00:00:00:00:00:00' in name with bd_addr 1474 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1475 } 1476 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 break; 1478 } 1479 case HCI_INIT_WRITE_INQUIRY_MODE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1481 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1482 break; 1483 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1484 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1485 hci_stack->secure_connections_active = true; 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1487 break; 1488 case HCI_INIT_WRITE_SCAN_ENABLE: 1489 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1490 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1491 break; 1492 // only sent if ENABLE_SCO_OVER_HCI is defined 1493 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1495 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1496 break; 1497 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1499 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1500 break; 1501 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1502 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1503 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1504 #ifdef ENABLE_SCO_OVER_HCI 1505 log_info("BCM: Route SCO data via HCI transport"); 1506 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1507 #endif 1508 #ifdef ENABLE_SCO_OVER_PCM 1509 log_info("BCM: Route SCO data via PCM interface"); 1510 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 4, 0, 1, 1); 1511 #endif 1512 break; 1513 1514 #endif 1515 #ifdef ENABLE_BLE 1516 // LE INIT 1517 case HCI_INIT_LE_READ_BUFFER_SIZE: 1518 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1519 hci_send_cmd(&hci_le_read_buffer_size); 1520 break; 1521 case HCI_INIT_LE_SET_EVENT_MASK: 1522 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1523 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1524 break; 1525 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1526 // LE Supported Host = 1, Simultaneous Host = 0 1527 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1528 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1529 break; 1530 #endif 1531 1532 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1533 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1534 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1535 hci_send_cmd(&hci_le_read_maximum_data_length); 1536 break; 1537 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1538 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1539 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1540 break; 1541 #endif 1542 1543 #ifdef ENABLE_LE_CENTRAL 1544 case HCI_INIT_READ_WHITE_LIST_SIZE: 1545 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1546 hci_send_cmd(&hci_le_read_white_list_size); 1547 break; 1548 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1549 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1550 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); 1551 break; 1552 #endif 1553 default: 1554 return; 1555 } 1556 } 1557 1558 static void hci_init_done(void){ 1559 // done. tell the app 1560 log_info("hci_init_done -> HCI_STATE_WORKING"); 1561 hci_stack->state = HCI_STATE_WORKING; 1562 hci_emit_state(); 1563 hci_run(); 1564 } 1565 1566 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1567 bool command_completed = false; 1568 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1569 uint16_t opcode = little_endian_read_16(packet,3); 1570 if (opcode == hci_stack->last_cmd_opcode){ 1571 command_completed = true; 1572 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1575 } 1576 } 1577 1578 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1579 uint8_t status = packet[2]; 1580 uint16_t opcode = little_endian_read_16(packet,4); 1581 if (opcode == hci_stack->last_cmd_opcode){ 1582 if (status){ 1583 command_completed = true; 1584 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1585 } else { 1586 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1587 } 1588 } else { 1589 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1590 } 1591 } 1592 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1593 // Vendor == CSR 1594 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1595 // TODO: track actual command 1596 command_completed = true; 1597 } 1598 1599 // Vendor == Toshiba 1600 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1601 // TODO: track actual command 1602 command_completed = true; 1603 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1604 hci_stack->num_cmd_packets = 1; 1605 } 1606 #endif 1607 1608 return command_completed; 1609 } 1610 1611 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1612 1613 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1614 1615 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1616 1617 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1618 1619 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1620 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1621 // 1622 // HCI Reset 1623 // Timeout 100 ms 1624 // HCI Reset 1625 // Command Complete Reset 1626 // HCI Read Local Version Information 1627 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1628 // hang... 1629 // 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1638 return; 1639 } 1640 } 1641 1642 // CSR & H5 1643 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1644 if (!command_completed 1645 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1646 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1647 1648 uint16_t opcode = little_endian_read_16(packet,3); 1649 if (opcode == hci_reset.opcode){ 1650 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1651 return; 1652 } 1653 } 1654 1655 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1656 // fix: Correct substate and behave as command below 1657 if (command_completed){ 1658 switch (hci_stack->substate){ 1659 case HCI_INIT_SEND_RESET: 1660 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1661 break; 1662 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1663 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1664 break; 1665 default: 1666 break; 1667 } 1668 } 1669 1670 #endif 1671 1672 if (!command_completed) return; 1673 1674 bool need_baud_change = false; 1675 bool need_addr_change = false; 1676 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 need_baud_change = hci_stack->config 1679 && hci_stack->chipset 1680 && hci_stack->chipset->set_baudrate_command 1681 && hci_stack->hci_transport->set_baudrate 1682 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1683 1684 need_addr_change = hci_stack->custom_bd_addr_set 1685 && hci_stack->chipset 1686 && hci_stack->chipset->set_bd_addr_command; 1687 #endif 1688 1689 switch(hci_stack->substate){ 1690 1691 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1692 case HCI_INIT_SEND_RESET: 1693 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1694 // fix: just correct substate and behave as command below 1695 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1696 btstack_run_loop_remove_timer(&hci_stack->timeout); 1697 break; 1698 case HCI_INIT_W4_SEND_RESET: 1699 btstack_run_loop_remove_timer(&hci_stack->timeout); 1700 break; 1701 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1702 log_info("Received local name, need baud change %d", (int) need_baud_change); 1703 if (need_baud_change){ 1704 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1705 return; 1706 } 1707 // skip baud change 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1711 // for STLC2500D, baud rate change already happened. 1712 // for others, baud rate gets changed now 1713 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1714 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1715 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1716 hci_stack->hci_transport->set_baudrate(baud_rate); 1717 } 1718 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1719 return; 1720 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1721 btstack_run_loop_remove_timer(&hci_stack->timeout); 1722 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1723 return; 1724 case HCI_INIT_W4_CUSTOM_INIT: 1725 // repeat custom init 1726 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1727 return; 1728 #else 1729 case HCI_INIT_W4_SEND_RESET: 1730 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1731 return ; 1732 #endif 1733 1734 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1735 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1736 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1737 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1738 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1739 return; 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1748 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1749 if (need_baud_change){ 1750 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1751 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1752 hci_stack->hci_transport->set_baudrate(baud_rate); 1753 } 1754 if (need_addr_change){ 1755 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1756 return; 1757 } 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 case HCI_INIT_W4_SET_BD_ADDR: 1761 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1762 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1763 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1764 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1765 return; 1766 } 1767 // skipping st warm boot 1768 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1769 return; 1770 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1772 return; 1773 #endif 1774 case HCI_INIT_W4_READ_BD_ADDR: 1775 // only read buffer size if supported 1776 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1777 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1778 return; 1779 } 1780 // skipping read buffer size 1781 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1782 return; 1783 case HCI_INIT_W4_SET_EVENT_MASK: 1784 // skip Classic init commands for LE only chipsets 1785 if (!hci_classic_supported()){ 1786 #ifdef ENABLE_BLE 1787 if (hci_le_supported()){ 1788 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1789 return; 1790 } 1791 #endif 1792 log_error("Neither BR/EDR nor LE supported"); 1793 hci_init_done(); 1794 return; 1795 } 1796 if (!gap_ssp_supported()){ 1797 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1798 return; 1799 } 1800 break; 1801 #ifdef ENABLE_BLE 1802 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1803 // skip write le host if not supported (e.g. on LE only EM9301) 1804 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1805 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1806 return; 1807 1808 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1809 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1810 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1811 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1812 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1813 return; 1814 } 1815 // explicit fall through to reduce repetitions 1816 1817 #ifdef ENABLE_LE_CENTRAL 1818 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1819 #else 1820 hci_init_done(); 1821 #endif 1822 return; 1823 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1824 1825 #endif /* ENABLE_BLE */ 1826 1827 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1828 // skip write secure connections host support if not supported or disabled 1829 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1830 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1831 return; 1832 } 1833 break; 1834 1835 #ifdef ENABLE_SCO_OVER_HCI 1836 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1837 // skip write synchronous flow control if not supported 1838 if (hci_stack->local_supported_commands[0] & 0x04) break; 1839 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1844 // skip write default erroneous data reporting if not supported 1845 if (hci_stack->local_supported_commands[0] & 0x08) break; 1846 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1847 1848 /* fall through */ 1849 1850 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1851 // skip bcm set sco pcm config on non-Broadcom chipsets 1852 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1853 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1854 1855 /* fall through */ 1856 1857 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1858 if (!hci_le_supported()){ 1859 // SKIP LE init for Classic only configuration 1860 hci_init_done(); 1861 return; 1862 } 1863 break; 1864 1865 #else /* !ENABLE_SCO_OVER_HCI */ 1866 1867 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1868 #ifdef ENABLE_SCO_OVER_PCM 1869 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1870 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1871 return; 1872 } 1873 #endif 1874 /* fall through */ 1875 1876 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1877 #ifdef ENABLE_BLE 1878 if (hci_le_supported()){ 1879 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1880 return; 1881 } 1882 #endif 1883 // SKIP LE init for Classic only configuration 1884 hci_init_done(); 1885 return; 1886 #endif /* ENABLE_SCO_OVER_HCI */ 1887 1888 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1889 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1890 // Response to command before init done state -> init done 1891 case (HCI_INIT_DONE-1): 1892 hci_init_done(); 1893 return; 1894 #endif 1895 1896 default: 1897 break; 1898 } 1899 hci_initializing_next_state(); 1900 } 1901 1902 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1903 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1904 bd_addr_t bd_address; 1905 (void)memcpy(&bd_address, conn->address, 6); 1906 1907 #ifdef ENABLE_CLASSIC 1908 // cache needed data 1909 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1910 #endif 1911 1912 // connection failed, remove entry 1913 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1914 btstack_memory_hci_connection_free( conn ); 1915 1916 #ifdef ENABLE_CLASSIC 1917 // notify client if dedicated bonding 1918 if (notify_dedicated_bonding_failed){ 1919 log_info("hci notify_dedicated_bonding_failed"); 1920 hci_emit_dedicated_bonding_result(bd_address, status); 1921 } 1922 1923 // if authentication error, also delete link key 1924 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1925 gap_drop_link_key_for_bd_addr(bd_address); 1926 } 1927 #else 1928 UNUSED(status); 1929 #endif 1930 } 1931 1932 #ifdef ENABLE_CLASSIC 1933 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1934 // SSP Controller 1935 if (features[6] & (1 << 3)){ 1936 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1937 } 1938 // eSCO 1939 if (features[3] & (1<<7)){ 1940 conn->remote_supported_features[0] |= 1; 1941 } 1942 // Extended features 1943 if (features[7] & (1<<7)){ 1944 conn->remote_supported_features[0] |= 2; 1945 } 1946 } 1947 1948 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1949 // SSP Host 1950 if (features[0] & (1 << 0)){ 1951 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1952 } 1953 // SC Host 1954 if (features[0] & (1 << 3)){ 1955 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1956 } 1957 } 1958 1959 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1960 // SC Controller 1961 if (features[1] & (1 << 0)){ 1962 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1963 } 1964 } 1965 1966 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1967 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1968 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1969 if (conn->bonding_flags & BONDING_DEDICATED){ 1970 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1971 } 1972 } 1973 #endif 1974 1975 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1976 // handle BT initialization 1977 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1978 hci_initializing_event_handler(packet, size); 1979 } 1980 1981 // help with BT sleep 1982 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1983 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1984 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1985 hci_initializing_next_state(); 1986 } 1987 } 1988 1989 #ifdef ENABLE_CLASSIC 1990 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1991 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1992 conn->encryption_key_size = encryption_key_size; 1993 1994 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1995 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1996 return; 1997 } 1998 1999 // Request Authentication if not already done 2000 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2001 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2002 } 2003 #endif 2004 2005 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2006 UNUSED(size); 2007 2008 uint16_t manufacturer; 2009 #ifdef ENABLE_CLASSIC 2010 hci_con_handle_t handle; 2011 hci_connection_t * conn; 2012 uint8_t status; 2013 #endif 2014 // get num cmd packets - limit to 1 to reduce complexity 2015 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2016 2017 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2018 switch (opcode){ 2019 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2020 if (packet[5]) break; 2021 // terminate, name 248 chars 2022 packet[6+248] = 0; 2023 log_info("local name: %s", &packet[6]); 2024 break; 2025 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2026 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2027 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2028 uint16_t acl_len = little_endian_read_16(packet, 6); 2029 uint16_t sco_len = packet[8]; 2030 2031 // determine usable ACL/SCO payload size 2032 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2033 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2034 2035 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2036 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2037 2038 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2039 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2040 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2041 } 2042 break; 2043 case HCI_OPCODE_HCI_READ_RSSI: 2044 if (packet[5] == ERROR_CODE_SUCCESS){ 2045 uint8_t event[5]; 2046 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2047 event[1] = 3; 2048 (void)memcpy(&event[2], &packet[6], 3); 2049 hci_emit_event(event, sizeof(event), 1); 2050 } 2051 break; 2052 #ifdef ENABLE_BLE 2053 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2054 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2055 hci_stack->le_acl_packets_total_num = packet[8]; 2056 // determine usable ACL payload size 2057 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2058 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2059 } 2060 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2061 break; 2062 #endif 2063 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2064 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2065 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2066 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2067 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); 2068 break; 2069 #endif 2070 #ifdef ENABLE_LE_CENTRAL 2071 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2072 hci_stack->le_whitelist_capacity = packet[6]; 2073 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2074 break; 2075 #endif 2076 case HCI_OPCODE_HCI_READ_BD_ADDR: 2077 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2078 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)); 2079 #ifdef ENABLE_CLASSIC 2080 if (hci_stack->link_key_db){ 2081 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2082 } 2083 #endif 2084 break; 2085 #ifdef ENABLE_CLASSIC 2086 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2087 hci_emit_discoverable_enabled(hci_stack->discoverable); 2088 break; 2089 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2090 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2091 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2092 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2093 hci_emit_event(event, sizeof(event), 1); 2094 } 2095 break; 2096 #endif 2097 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2098 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2099 2100 #ifdef ENABLE_CLASSIC 2101 // determine usable ACL packet types based on host buffer size and supported features 2102 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2103 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2104 #endif 2105 // Classic/LE 2106 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2107 break; 2108 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2109 manufacturer = little_endian_read_16(packet, 10); 2110 // map Cypress to Broadcom 2111 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2112 log_info("Treat Cypress as Broadcom"); 2113 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2114 little_endian_store_16(packet, 10, manufacturer); 2115 } 2116 hci_stack->manufacturer = manufacturer; 2117 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2118 break; 2119 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2120 hci_stack->local_supported_commands[0] = 2121 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2122 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2123 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2124 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2125 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2126 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2127 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2128 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2129 hci_stack->local_supported_commands[1] = 2130 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2131 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2132 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2133 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2134 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2135 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2136 break; 2137 #ifdef ENABLE_CLASSIC 2138 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2139 if (packet[5]) return; 2140 hci_stack->synchronous_flow_control_enabled = 1; 2141 break; 2142 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2143 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2144 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2145 conn = hci_connection_for_handle(handle); 2146 if (conn != NULL) { 2147 uint8_t key_size = 0; 2148 if (status == 0){ 2149 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2150 log_info("Handle %04x key Size: %u", handle, key_size); 2151 } else { 2152 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2153 } 2154 hci_handle_read_encryption_key_size_complete(conn, key_size); 2155 } 2156 break; 2157 #endif 2158 default: 2159 break; 2160 } 2161 } 2162 2163 #ifdef ENABLE_BLE 2164 static void event_handle_le_connection_complete(const uint8_t * packet){ 2165 bd_addr_t addr; 2166 bd_addr_type_t addr_type; 2167 hci_connection_t * conn; 2168 2169 // Connection management 2170 reverse_bd_addr(&packet[8], addr); 2171 addr_type = (bd_addr_type_t)packet[7]; 2172 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2173 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2174 2175 #ifdef ENABLE_LE_CENTRAL 2176 // handle error: error is reported only to the initiator -> outgoing connection 2177 if (packet[3]){ 2178 2179 // handle cancelled outgoing connection 2180 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2181 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2182 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2183 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2184 // whitelist connect 2185 if (hci_is_le_connection_type(addr_type)){ 2186 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2187 } 2188 // get outgoing connection conn struct for direct connect 2189 conn = gap_get_outgoing_connection(); 2190 } 2191 2192 // outgoing le connection establishment is done 2193 if (conn){ 2194 // remove entry 2195 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2196 btstack_memory_hci_connection_free( conn ); 2197 } 2198 return; 2199 } 2200 #endif 2201 2202 // on success, both hosts receive connection complete event 2203 if (packet[6] == HCI_ROLE_MASTER){ 2204 #ifdef ENABLE_LE_CENTRAL 2205 // if we're master on an le connection, it was an outgoing connection and we're done with it 2206 // note: no hci_connection_t object exists yet for connect with whitelist 2207 if (hci_is_le_connection_type(addr_type)){ 2208 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2209 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2210 } 2211 #endif 2212 } else { 2213 #ifdef ENABLE_LE_PERIPHERAL 2214 // if we're slave, it was an incoming connection, advertisements have stopped 2215 hci_stack->le_advertisements_active = false; 2216 #endif 2217 } 2218 2219 // LE connections are auto-accepted, so just create a connection if there isn't one already 2220 if (!conn){ 2221 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2222 } 2223 2224 // no memory, sorry. 2225 if (!conn){ 2226 return; 2227 } 2228 2229 conn->state = OPEN; 2230 conn->role = packet[6]; 2231 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2232 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2233 2234 #ifdef ENABLE_LE_PERIPHERAL 2235 if (packet[6] == HCI_ROLE_SLAVE){ 2236 hci_update_advertisements_enabled_for_current_roles(); 2237 } 2238 #endif 2239 2240 // init unenhanced att bearer mtu 2241 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2242 conn->att_connection.mtu_exchanged = false; 2243 2244 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2245 2246 // restart timer 2247 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2248 // btstack_run_loop_add_timer(&conn->timeout); 2249 2250 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2251 2252 hci_emit_nr_connections_changed(); 2253 } 2254 #endif 2255 2256 static void event_handler(uint8_t *packet, uint16_t size){ 2257 2258 uint16_t event_length = packet[1]; 2259 2260 // assert packet is complete 2261 if (size != (event_length + 2u)){ 2262 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2263 return; 2264 } 2265 2266 bd_addr_type_t addr_type; 2267 hci_con_handle_t handle; 2268 hci_connection_t * conn; 2269 int i; 2270 int create_connection_cmd; 2271 2272 #ifdef ENABLE_CLASSIC 2273 hci_link_type_t link_type; 2274 bd_addr_t addr; 2275 #endif 2276 2277 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2278 2279 switch (hci_event_packet_get_type(packet)) { 2280 2281 case HCI_EVENT_COMMAND_COMPLETE: 2282 handle_command_complete_event(packet, size); 2283 break; 2284 2285 case HCI_EVENT_COMMAND_STATUS: 2286 // get num cmd packets - limit to 1 to reduce complexity 2287 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2288 2289 // check command status to detected failed outgoing connections 2290 create_connection_cmd = 0; 2291 #ifdef ENABLE_CLASSIC 2292 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2293 create_connection_cmd = 1; 2294 } 2295 #endif 2296 #ifdef ENABLE_LE_CENTRAL 2297 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2298 create_connection_cmd = 1; 2299 } 2300 #endif 2301 if (create_connection_cmd) { 2302 uint8_t status = hci_event_command_status_get_status(packet); 2303 addr_type = hci_stack->outgoing_addr_type; 2304 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2305 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); 2306 2307 // reset outgoing address info 2308 memset(hci_stack->outgoing_addr, 0, 6); 2309 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2310 2311 // on error 2312 if (status != ERROR_CODE_SUCCESS){ 2313 #ifdef ENABLE_LE_CENTRAL 2314 if (hci_is_le_connection_type(addr_type)){ 2315 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2316 } 2317 #endif 2318 // error => outgoing connection failed 2319 if (conn != NULL){ 2320 hci_handle_connection_failed(conn, status); 2321 } 2322 } 2323 } 2324 break; 2325 2326 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2327 if (size < 3) return; 2328 uint16_t num_handles = packet[2]; 2329 if (size != (3u + num_handles * 4u)) return; 2330 uint16_t offset = 3; 2331 for (i=0; i<num_handles;i++){ 2332 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2333 offset += 2u; 2334 uint16_t num_packets = little_endian_read_16(packet, offset); 2335 offset += 2u; 2336 2337 conn = hci_connection_for_handle(handle); 2338 if (!conn){ 2339 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2340 continue; 2341 } 2342 2343 if (conn->num_packets_sent >= num_packets){ 2344 conn->num_packets_sent -= num_packets; 2345 } else { 2346 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2347 conn->num_packets_sent = 0; 2348 } 2349 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2350 2351 #ifdef ENABLE_CLASSIC 2352 // For SCO, we do the can_send_now_check here 2353 hci_notify_if_sco_can_send_now(); 2354 #endif 2355 } 2356 break; 2357 } 2358 2359 #ifdef ENABLE_CLASSIC 2360 case HCI_EVENT_INQUIRY_COMPLETE: 2361 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2362 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2363 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2364 hci_emit_event(event, sizeof(event), 1); 2365 } 2366 break; 2367 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2368 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2369 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2370 } 2371 break; 2372 case HCI_EVENT_CONNECTION_REQUEST: 2373 reverse_bd_addr(&packet[2], addr); 2374 link_type = (hci_link_type_t) packet[11]; 2375 if (hci_stack->gap_classic_accept_callback != NULL){ 2376 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2377 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2378 bd_addr_copy(hci_stack->decline_addr, addr); 2379 break; 2380 } 2381 } 2382 2383 // TODO: eval COD 8-10 2384 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2385 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2386 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2387 if (!conn) { 2388 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2389 } 2390 if (!conn) { 2391 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2392 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2393 bd_addr_copy(hci_stack->decline_addr, addr); 2394 break; 2395 } 2396 conn->role = HCI_ROLE_SLAVE; 2397 conn->state = RECEIVED_CONNECTION_REQUEST; 2398 // store info about eSCO 2399 if (link_type == HCI_LINK_TYPE_ESCO){ 2400 conn->remote_supported_features[0] |= 1; 2401 } 2402 hci_run(); 2403 break; 2404 2405 case HCI_EVENT_CONNECTION_COMPLETE: 2406 // Connection management 2407 reverse_bd_addr(&packet[5], addr); 2408 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2409 addr_type = BD_ADDR_TYPE_ACL; 2410 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2411 if (conn) { 2412 if (!packet[2]){ 2413 conn->state = OPEN; 2414 conn->con_handle = little_endian_read_16(packet, 3); 2415 2416 // queue get remote feature 2417 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2418 2419 // queue set supervision timeout if we're master 2420 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2421 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2422 } 2423 2424 // restart timer 2425 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2426 btstack_run_loop_add_timer(&conn->timeout); 2427 2428 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2429 2430 hci_emit_nr_connections_changed(); 2431 } else { 2432 // connection failed 2433 hci_handle_connection_failed(conn, packet[2]); 2434 } 2435 } 2436 break; 2437 2438 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2439 reverse_bd_addr(&packet[5], addr); 2440 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2441 if (packet[2]){ 2442 // connection failed 2443 break; 2444 } 2445 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2446 if (!conn) { 2447 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2448 } 2449 if (!conn) { 2450 break; 2451 } 2452 conn->state = OPEN; 2453 conn->con_handle = little_endian_read_16(packet, 3); 2454 2455 #ifdef ENABLE_SCO_OVER_HCI 2456 // update SCO 2457 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2458 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2459 } 2460 // trigger can send now 2461 if (hci_have_usb_transport()){ 2462 hci_stack->sco_can_send_now = 1; 2463 } 2464 #endif 2465 break; 2466 2467 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2468 handle = little_endian_read_16(packet, 3); 2469 conn = hci_connection_for_handle(handle); 2470 if (!conn) break; 2471 if (!packet[2]){ 2472 const uint8_t * features = &packet[5]; 2473 hci_handle_remote_features_page_0(conn, features); 2474 2475 // read extended features if possible 2476 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2477 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2478 break; 2479 } 2480 } 2481 hci_handle_remote_features_received(conn); 2482 break; 2483 2484 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2485 handle = little_endian_read_16(packet, 3); 2486 conn = hci_connection_for_handle(handle); 2487 if (!conn) break; 2488 // status = ok, page = 1 2489 if (!packet[2]) { 2490 uint8_t page_number = packet[5]; 2491 uint8_t maximum_page_number = packet[6]; 2492 const uint8_t * features = &packet[7]; 2493 bool done = false; 2494 switch (page_number){ 2495 case 1: 2496 hci_handle_remote_features_page_1(conn, features); 2497 if (maximum_page_number >= 2){ 2498 // get Secure Connections (Controller) from Page 2 if available 2499 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2500 } else { 2501 // otherwise, assume SC (Controller) == SC (Host) 2502 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2503 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2504 } 2505 done = true; 2506 } 2507 break; 2508 case 2: 2509 hci_handle_remote_features_page_2(conn, features); 2510 done = true; 2511 break; 2512 default: 2513 break; 2514 } 2515 if (!done) break; 2516 } 2517 hci_handle_remote_features_received(conn); 2518 break; 2519 2520 case HCI_EVENT_LINK_KEY_REQUEST: 2521 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2522 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2523 // request handled by hci_run() 2524 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2525 break; 2526 2527 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2528 reverse_bd_addr(&packet[2], addr); 2529 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2530 if (!conn) break; 2531 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2532 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2533 // Change Connection Encryption keeps link key type 2534 if (link_key_type != CHANGED_COMBINATION_KEY){ 2535 conn->link_key_type = link_key_type; 2536 } 2537 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2538 // still forward event to allow dismiss of pairing dialog 2539 break; 2540 } 2541 2542 case HCI_EVENT_PIN_CODE_REQUEST: 2543 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2544 // non-bondable mode: pin code negative reply will be sent 2545 if (!hci_stack->bondable){ 2546 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2547 hci_run(); 2548 return; 2549 } 2550 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2551 if (!hci_stack->link_key_db) break; 2552 hci_event_pin_code_request_get_bd_addr(packet, addr); 2553 hci_stack->link_key_db->delete_link_key(addr); 2554 break; 2555 2556 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2557 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2558 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2559 break; 2560 2561 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2562 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2563 if (!hci_stack->ssp_auto_accept) break; 2564 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2565 break; 2566 2567 case HCI_EVENT_USER_PASSKEY_REQUEST: 2568 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2569 if (!hci_stack->ssp_auto_accept) break; 2570 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2571 break; 2572 case HCI_EVENT_MODE_CHANGE: 2573 handle = hci_event_mode_change_get_handle(packet); 2574 conn = hci_connection_for_handle(handle); 2575 if (!conn) break; 2576 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2577 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2578 break; 2579 #endif 2580 2581 case HCI_EVENT_ENCRYPTION_CHANGE: 2582 handle = hci_event_encryption_change_get_connection_handle(packet); 2583 conn = hci_connection_for_handle(handle); 2584 if (!conn) break; 2585 if (hci_event_encryption_change_get_status(packet) == 0u) { 2586 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2587 if (encryption_enabled){ 2588 if (hci_is_le_connection(conn)){ 2589 // For LE, we accept connection as encrypted 2590 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2591 } 2592 #ifdef ENABLE_CLASSIC 2593 else { 2594 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2595 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2596 bool connected_uses_aes_ccm = encryption_enabled == 2; 2597 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2598 log_info("SC during pairing, but only E0 now -> abort"); 2599 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2600 break; 2601 } 2602 2603 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2604 if (connected_uses_aes_ccm){ 2605 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2606 } 2607 2608 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2609 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2610 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2611 } else { 2612 // if not, pretend everything is perfect 2613 hci_handle_read_encryption_key_size_complete(conn, 16); 2614 } 2615 } 2616 #endif 2617 } else { 2618 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2619 } 2620 } 2621 2622 break; 2623 2624 #ifdef ENABLE_CLASSIC 2625 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2626 handle = hci_event_authentication_complete_get_connection_handle(packet); 2627 conn = hci_connection_for_handle(handle); 2628 if (!conn) break; 2629 2630 // ignore authentication event if we didn't request it 2631 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2632 2633 // dedicated bonding: send result and disconnect 2634 if (conn->bonding_flags & BONDING_DEDICATED){ 2635 conn->bonding_flags &= ~BONDING_DEDICATED; 2636 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2637 conn->bonding_status = packet[2]; 2638 break; 2639 } 2640 2641 // authenticated only if auth status == 0 2642 if (hci_event_authentication_complete_get_status(packet) == 0){ 2643 // authenticated 2644 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2645 2646 // If link key sufficient for requested security and not already encrypted, start encryption 2647 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2648 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2649 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2650 break; 2651 } 2652 } 2653 2654 // emit updated security level 2655 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2656 break; 2657 #endif 2658 2659 // HCI_EVENT_DISCONNECTION_COMPLETE 2660 // has been split, to first notify stack before shutting connection down 2661 // see end of function, too. 2662 case HCI_EVENT_DISCONNECTION_COMPLETE: 2663 if (packet[2]) break; // status != 0 2664 handle = little_endian_read_16(packet, 3); 2665 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2666 if (hci_stack->acl_fragmentation_total_size > 0u) { 2667 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2668 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2669 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2670 hci_stack->acl_fragmentation_total_size = 0; 2671 hci_stack->acl_fragmentation_pos = 0; 2672 if (release_buffer){ 2673 hci_release_packet_buffer(); 2674 } 2675 } 2676 } 2677 2678 conn = hci_connection_for_handle(handle); 2679 if (!conn) break; 2680 // mark connection for shutdown 2681 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2682 2683 // emit dedicatd bonding event 2684 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2685 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2686 } 2687 2688 #ifdef ENABLE_BLE 2689 #ifdef ENABLE_LE_PERIPHERAL 2690 // re-enable advertisements for le connections if active 2691 if (hci_is_le_connection(conn)){ 2692 hci_update_advertisements_enabled_for_current_roles(); 2693 } 2694 #endif 2695 #endif 2696 break; 2697 2698 case HCI_EVENT_HARDWARE_ERROR: 2699 log_error("Hardware Error: 0x%02x", packet[2]); 2700 if (hci_stack->hardware_error_callback){ 2701 (*hci_stack->hardware_error_callback)(packet[2]); 2702 } else { 2703 // if no special requests, just reboot stack 2704 hci_power_control_off(); 2705 hci_power_control_on(); 2706 } 2707 break; 2708 2709 #ifdef ENABLE_CLASSIC 2710 case HCI_EVENT_ROLE_CHANGE: 2711 if (packet[2]) break; // status != 0 2712 reverse_bd_addr(&packet[3], addr); 2713 addr_type = BD_ADDR_TYPE_ACL; 2714 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2715 if (!conn) break; 2716 conn->role = packet[9]; 2717 break; 2718 #endif 2719 2720 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2721 // release packet buffer only for asynchronous transport and if there are not further fragements 2722 if (hci_transport_synchronous()) { 2723 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2724 return; // instead of break: to avoid re-entering hci_run() 2725 } 2726 hci_stack->acl_fragmentation_tx_active = 0; 2727 if (hci_stack->acl_fragmentation_total_size) break; 2728 hci_release_packet_buffer(); 2729 2730 // L2CAP receives this event via the hci_emit_event below 2731 2732 #ifdef ENABLE_CLASSIC 2733 // For SCO, we do the can_send_now_check here 2734 hci_notify_if_sco_can_send_now(); 2735 #endif 2736 break; 2737 2738 #ifdef ENABLE_CLASSIC 2739 case HCI_EVENT_SCO_CAN_SEND_NOW: 2740 // For SCO, we do the can_send_now_check here 2741 hci_stack->sco_can_send_now = 1; 2742 hci_notify_if_sco_can_send_now(); 2743 return; 2744 2745 // explode inquriy results for easier consumption 2746 case HCI_EVENT_INQUIRY_RESULT: 2747 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2748 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2749 gap_inquiry_explode(packet, size); 2750 break; 2751 #endif 2752 2753 #ifdef ENABLE_BLE 2754 case HCI_EVENT_LE_META: 2755 switch (packet[2]){ 2756 #ifdef ENABLE_LE_CENTRAL 2757 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2758 // log_info("advertising report received"); 2759 if (!hci_stack->le_scanning_enabled) break; 2760 le_handle_advertisement_report(packet, size); 2761 break; 2762 #endif 2763 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2764 event_handle_le_connection_complete(packet); 2765 break; 2766 2767 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2768 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2769 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2770 conn = hci_connection_for_handle(handle); 2771 if (!conn) break; 2772 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2773 break; 2774 2775 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2776 // connection 2777 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2778 conn = hci_connection_for_handle(handle); 2779 if (conn) { 2780 // read arguments 2781 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2782 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2783 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2784 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2785 2786 // validate against current connection parameter range 2787 le_connection_parameter_range_t existing_range; 2788 gap_get_connection_parameter_range(&existing_range); 2789 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2790 if (update_parameter){ 2791 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2792 conn->le_conn_interval_min = le_conn_interval_min; 2793 conn->le_conn_interval_max = le_conn_interval_max; 2794 conn->le_conn_latency = le_conn_latency; 2795 conn->le_supervision_timeout = le_supervision_timeout; 2796 } else { 2797 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2798 } 2799 } 2800 break; 2801 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2802 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2803 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2804 conn = hci_connection_for_handle(handle); 2805 if (conn) { 2806 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2807 } 2808 break; 2809 #endif 2810 default: 2811 break; 2812 } 2813 break; 2814 #endif 2815 case HCI_EVENT_VENDOR_SPECIFIC: 2816 // Vendor specific commands often create vendor specific event instead of num completed packets 2817 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2818 switch (hci_stack->manufacturer){ 2819 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2820 hci_stack->num_cmd_packets = 1; 2821 break; 2822 default: 2823 break; 2824 } 2825 break; 2826 default: 2827 break; 2828 } 2829 2830 handle_event_for_current_stack_state(packet, size); 2831 2832 // notify upper stack 2833 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2834 2835 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2836 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2837 handle = little_endian_read_16(packet, 3); 2838 hci_connection_t * aConn = hci_connection_for_handle(handle); 2839 // discard connection if app did not trigger a reconnect in the event handler 2840 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2841 hci_shutdown_connection(aConn); 2842 } 2843 } 2844 2845 // execute main loop 2846 hci_run(); 2847 } 2848 2849 #ifdef ENABLE_CLASSIC 2850 2851 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2852 static void sco_schedule_tx(hci_connection_t * conn); 2853 2854 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2855 log_debug("SCO TX Timeout"); 2856 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2857 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2858 if (!conn) return; 2859 2860 // trigger send 2861 conn->sco_tx_ready = 1; 2862 // extra packet if CVSD but SCO buffer is too short 2863 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2864 conn->sco_tx_ready++; 2865 } 2866 hci_notify_if_sco_can_send_now(); 2867 } 2868 2869 2870 #define SCO_TX_AFTER_RX_MS (6) 2871 2872 static void sco_schedule_tx(hci_connection_t * conn){ 2873 2874 uint32_t now = btstack_run_loop_get_time_ms(); 2875 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2876 int time_delta_ms = sco_tx_ms - now; 2877 2878 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2879 2880 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2881 btstack_run_loop_set_timer(timer, time_delta_ms); 2882 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2883 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2884 btstack_run_loop_add_timer(timer); 2885 } 2886 2887 static void sco_handler(uint8_t * packet, uint16_t size){ 2888 // lookup connection struct 2889 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2890 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2891 if (!conn) return; 2892 2893 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2894 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2895 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2896 packet[2] = 0x3c; 2897 memmove(&packet[3], &packet[23], 63); 2898 size = 63; 2899 } 2900 } 2901 2902 if (hci_have_usb_transport()){ 2903 // Nothing to do 2904 } else { 2905 // 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); 2906 if (hci_stack->synchronous_flow_control_enabled == 0){ 2907 uint32_t now = btstack_run_loop_get_time_ms(); 2908 2909 if (!conn->sco_rx_valid){ 2910 // ignore first 10 packets 2911 conn->sco_rx_count++; 2912 // log_debug("sco rx count %u", conn->sco_rx_count); 2913 if (conn->sco_rx_count == 10) { 2914 // use first timestamp as is and pretent it just started 2915 conn->sco_rx_ms = now; 2916 conn->sco_rx_valid = 1; 2917 conn->sco_rx_count = 0; 2918 sco_schedule_tx(conn); 2919 } 2920 } else { 2921 // track expected arrival timme 2922 conn->sco_rx_count++; 2923 conn->sco_rx_ms += 7; 2924 int delta = (int32_t) (now - conn->sco_rx_ms); 2925 if (delta > 0){ 2926 conn->sco_rx_ms++; 2927 } 2928 // log_debug("sco rx %u", conn->sco_rx_ms); 2929 sco_schedule_tx(conn); 2930 } 2931 } 2932 } 2933 // deliver to app 2934 if (hci_stack->sco_packet_handler) { 2935 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2936 } 2937 2938 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2939 conn->num_packets_completed++; 2940 hci_stack->host_completed_packets = 1; 2941 hci_run(); 2942 #endif 2943 } 2944 #endif 2945 2946 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2947 hci_dump_packet(packet_type, 1, packet, size); 2948 switch (packet_type) { 2949 case HCI_EVENT_PACKET: 2950 event_handler(packet, size); 2951 break; 2952 case HCI_ACL_DATA_PACKET: 2953 acl_handler(packet, size); 2954 break; 2955 #ifdef ENABLE_CLASSIC 2956 case HCI_SCO_DATA_PACKET: 2957 sco_handler(packet, size); 2958 break; 2959 #endif 2960 default: 2961 break; 2962 } 2963 } 2964 2965 /** 2966 * @brief Add event packet handler. 2967 */ 2968 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2969 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2970 } 2971 2972 2973 /** Register HCI packet handlers */ 2974 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2975 hci_stack->acl_packet_handler = handler; 2976 } 2977 2978 #ifdef ENABLE_CLASSIC 2979 /** 2980 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2981 */ 2982 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2983 hci_stack->sco_packet_handler = handler; 2984 } 2985 #endif 2986 2987 static void hci_state_reset(void){ 2988 // no connections yet 2989 hci_stack->connections = NULL; 2990 2991 // keep discoverable/connectable as this has been requested by the client(s) 2992 // hci_stack->discoverable = 0; 2993 // hci_stack->connectable = 0; 2994 // hci_stack->bondable = 1; 2995 // hci_stack->own_addr_type = 0; 2996 2997 // buffer is free 2998 hci_stack->hci_packet_buffer_reserved = 0; 2999 3000 // no pending cmds 3001 hci_stack->decline_reason = 0; 3002 hci_stack->new_scan_enable_value = 0xff; 3003 3004 hci_stack->secure_connections_active = false; 3005 3006 // LE 3007 #ifdef ENABLE_BLE 3008 memset(hci_stack->le_random_address, 0, 6); 3009 hci_stack->le_random_address_set = 0; 3010 #endif 3011 #ifdef ENABLE_LE_CENTRAL 3012 hci_stack->le_scanning_active = 0; 3013 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3014 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3015 hci_stack->le_whitelist_capacity = 0; 3016 #endif 3017 } 3018 3019 #ifdef ENABLE_CLASSIC 3020 /** 3021 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3022 */ 3023 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3024 // store and open remote device db 3025 hci_stack->link_key_db = link_key_db; 3026 if (hci_stack->link_key_db) { 3027 hci_stack->link_key_db->open(); 3028 } 3029 } 3030 #endif 3031 3032 void hci_init(const hci_transport_t *transport, const void *config){ 3033 3034 #ifdef HAVE_MALLOC 3035 if (!hci_stack) { 3036 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3037 } 3038 #else 3039 hci_stack = &hci_stack_static; 3040 #endif 3041 memset(hci_stack, 0, sizeof(hci_stack_t)); 3042 3043 // reference to use transport layer implementation 3044 hci_stack->hci_transport = transport; 3045 3046 // reference to used config 3047 hci_stack->config = config; 3048 3049 // setup pointer for outgoing packet buffer 3050 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3051 3052 // max acl payload size defined in config.h 3053 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3054 3055 // register packet handlers with transport 3056 transport->register_packet_handler(&packet_handler); 3057 3058 hci_stack->state = HCI_STATE_OFF; 3059 3060 // class of device 3061 hci_stack->class_of_device = 0x007a020c; // Smartphone 3062 3063 // bondable by default 3064 hci_stack->bondable = 1; 3065 3066 #ifdef ENABLE_CLASSIC 3067 // classic name 3068 hci_stack->local_name = default_classic_name; 3069 3070 // Master slave policy 3071 hci_stack->master_slave_policy = 1; 3072 3073 // Allow Role Switch 3074 hci_stack->allow_role_switch = 1; 3075 3076 // Default / minimum security level = 2 3077 hci_stack->gap_security_level = LEVEL_2; 3078 3079 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3080 hci_stack->gap_required_encyrption_key_size = 7; 3081 #endif 3082 3083 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3084 hci_stack->ssp_enable = 1; 3085 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3086 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3087 hci_stack->ssp_auto_accept = 1; 3088 3089 // Secure Connections: enable (requires support from Controller) 3090 hci_stack->secure_connections_enable = true; 3091 3092 // voice setting - signed 16 bit pcm data with CVSD over the air 3093 hci_stack->sco_voice_setting = 0x60; 3094 3095 #ifdef ENABLE_LE_CENTRAL 3096 // connection parameter to use for outgoing connections 3097 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3098 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3099 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3100 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3101 hci_stack->le_connection_latency = 4; // 4 3102 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3103 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3104 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3105 3106 // default LE Scanning 3107 hci_stack->le_scan_type = 0x1; // active 3108 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3109 hci_stack->le_scan_window = 0x30; // 30 ms 3110 #endif 3111 3112 #ifdef ENABLE_LE_PERIPHERAL 3113 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3114 #endif 3115 3116 // connection parameter range used to answer connection parameter update requests in l2cap 3117 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3118 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3119 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3120 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3121 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3122 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3123 3124 hci_state_reset(); 3125 } 3126 3127 void hci_deinit(void){ 3128 #ifdef HAVE_MALLOC 3129 if (hci_stack) { 3130 free(hci_stack); 3131 } 3132 #endif 3133 hci_stack = NULL; 3134 3135 #ifdef ENABLE_CLASSIC 3136 disable_l2cap_timeouts = 0; 3137 #endif 3138 } 3139 3140 /** 3141 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3142 */ 3143 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3144 hci_stack->chipset = chipset_driver; 3145 3146 // reset chipset driver - init is also called on power_up 3147 if (hci_stack->chipset && hci_stack->chipset->init){ 3148 hci_stack->chipset->init(hci_stack->config); 3149 } 3150 } 3151 3152 /** 3153 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3154 */ 3155 void hci_set_control(const btstack_control_t *hardware_control){ 3156 // references to used control implementation 3157 hci_stack->control = hardware_control; 3158 // init with transport config 3159 hardware_control->init(hci_stack->config); 3160 } 3161 3162 void hci_close(void){ 3163 // close remote device db 3164 if (hci_stack->link_key_db) { 3165 hci_stack->link_key_db->close(); 3166 } 3167 3168 btstack_linked_list_iterator_t lit; 3169 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3170 while (btstack_linked_list_iterator_has_next(&lit)){ 3171 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3172 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3173 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3174 hci_shutdown_connection(connection); 3175 } 3176 3177 hci_power_control(HCI_POWER_OFF); 3178 3179 #ifdef HAVE_MALLOC 3180 free(hci_stack); 3181 #endif 3182 hci_stack = NULL; 3183 } 3184 3185 #ifdef ENABLE_CLASSIC 3186 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3187 // validate ranage and set 3188 if (encryption_key_size < 7) return; 3189 if (encryption_key_size > 16) return; 3190 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3191 } 3192 3193 void gap_set_security_level(gap_security_level_t security_level){ 3194 hci_stack->gap_security_level = security_level; 3195 } 3196 3197 gap_security_level_t gap_get_security_level(void){ 3198 return hci_stack->gap_security_level; 3199 } 3200 #endif 3201 3202 #ifdef ENABLE_CLASSIC 3203 void gap_set_class_of_device(uint32_t class_of_device){ 3204 hci_stack->class_of_device = class_of_device; 3205 } 3206 3207 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3208 hci_stack->default_link_policy_settings = default_link_policy_settings; 3209 } 3210 3211 void gap_set_allow_role_switch(bool allow_role_switch){ 3212 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3213 } 3214 3215 uint8_t hci_get_allow_role_switch(void){ 3216 return hci_stack->allow_role_switch; 3217 } 3218 3219 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3220 hci_stack->link_supervision_timeout = link_supervision_timeout; 3221 } 3222 3223 void hci_disable_l2cap_timeout_check(void){ 3224 disable_l2cap_timeouts = 1; 3225 } 3226 #endif 3227 3228 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3229 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3230 void hci_set_bd_addr(bd_addr_t addr){ 3231 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3232 hci_stack->custom_bd_addr_set = 1; 3233 } 3234 #endif 3235 3236 // State-Module-Driver overview 3237 // state module low-level 3238 // HCI_STATE_OFF off close 3239 // HCI_STATE_INITIALIZING, on open 3240 // HCI_STATE_WORKING, on open 3241 // HCI_STATE_HALTING, on open 3242 // HCI_STATE_SLEEPING, off/sleep close 3243 // HCI_STATE_FALLING_ASLEEP on open 3244 3245 static int hci_power_control_on(void){ 3246 3247 // power on 3248 int err = 0; 3249 if (hci_stack->control && hci_stack->control->on){ 3250 err = (*hci_stack->control->on)(); 3251 } 3252 if (err){ 3253 log_error( "POWER_ON failed"); 3254 hci_emit_hci_open_failed(); 3255 return err; 3256 } 3257 3258 // int chipset driver 3259 if (hci_stack->chipset && hci_stack->chipset->init){ 3260 hci_stack->chipset->init(hci_stack->config); 3261 } 3262 3263 // init transport 3264 if (hci_stack->hci_transport->init){ 3265 hci_stack->hci_transport->init(hci_stack->config); 3266 } 3267 3268 // open transport 3269 err = hci_stack->hci_transport->open(); 3270 if (err){ 3271 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3272 if (hci_stack->control && hci_stack->control->off){ 3273 (*hci_stack->control->off)(); 3274 } 3275 hci_emit_hci_open_failed(); 3276 return err; 3277 } 3278 return 0; 3279 } 3280 3281 static void hci_power_control_off(void){ 3282 3283 log_info("hci_power_control_off"); 3284 3285 // close low-level device 3286 hci_stack->hci_transport->close(); 3287 3288 log_info("hci_power_control_off - hci_transport closed"); 3289 3290 // power off 3291 if (hci_stack->control && hci_stack->control->off){ 3292 (*hci_stack->control->off)(); 3293 } 3294 3295 log_info("hci_power_control_off - control closed"); 3296 3297 hci_stack->state = HCI_STATE_OFF; 3298 } 3299 3300 static void hci_power_control_sleep(void){ 3301 3302 log_info("hci_power_control_sleep"); 3303 3304 #if 0 3305 // don't close serial port during sleep 3306 3307 // close low-level device 3308 hci_stack->hci_transport->close(hci_stack->config); 3309 #endif 3310 3311 // sleep mode 3312 if (hci_stack->control && hci_stack->control->sleep){ 3313 (*hci_stack->control->sleep)(); 3314 } 3315 3316 hci_stack->state = HCI_STATE_SLEEPING; 3317 } 3318 3319 static int hci_power_control_wake(void){ 3320 3321 log_info("hci_power_control_wake"); 3322 3323 // wake on 3324 if (hci_stack->control && hci_stack->control->wake){ 3325 (*hci_stack->control->wake)(); 3326 } 3327 3328 #if 0 3329 // open low-level device 3330 int err = hci_stack->hci_transport->open(hci_stack->config); 3331 if (err){ 3332 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3333 if (hci_stack->control && hci_stack->control->off){ 3334 (*hci_stack->control->off)(); 3335 } 3336 hci_emit_hci_open_failed(); 3337 return err; 3338 } 3339 #endif 3340 3341 return 0; 3342 } 3343 3344 static void hci_power_transition_to_initializing(void){ 3345 // set up state machine 3346 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3347 hci_stack->hci_packet_buffer_reserved = 0; 3348 hci_stack->state = HCI_STATE_INITIALIZING; 3349 hci_stack->substate = HCI_INIT_SEND_RESET; 3350 } 3351 3352 // returns error 3353 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3354 int err; 3355 switch (power_mode){ 3356 case HCI_POWER_ON: 3357 err = hci_power_control_on(); 3358 if (err != 0) { 3359 log_error("hci_power_control_on() error %d", err); 3360 return err; 3361 } 3362 hci_power_transition_to_initializing(); 3363 break; 3364 case HCI_POWER_OFF: 3365 // do nothing 3366 break; 3367 case HCI_POWER_SLEEP: 3368 // do nothing (with SLEEP == OFF) 3369 break; 3370 default: 3371 btstack_assert(false); 3372 break; 3373 } 3374 return ERROR_CODE_SUCCESS; 3375 } 3376 3377 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3378 switch (power_mode){ 3379 case HCI_POWER_ON: 3380 // do nothing 3381 break; 3382 case HCI_POWER_OFF: 3383 // no connections yet, just turn it off 3384 hci_power_control_off(); 3385 break; 3386 case HCI_POWER_SLEEP: 3387 // no connections yet, just turn it off 3388 hci_power_control_sleep(); 3389 break; 3390 default: 3391 btstack_assert(false); 3392 break; 3393 } 3394 return ERROR_CODE_SUCCESS; 3395 } 3396 3397 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3398 switch (power_mode){ 3399 case HCI_POWER_ON: 3400 // do nothing 3401 break; 3402 case HCI_POWER_OFF: 3403 // see hci_run 3404 hci_stack->state = HCI_STATE_HALTING; 3405 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3406 break; 3407 case HCI_POWER_SLEEP: 3408 // see hci_run 3409 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3410 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3411 break; 3412 default: 3413 btstack_assert(false); 3414 break; 3415 } 3416 return ERROR_CODE_SUCCESS; 3417 } 3418 3419 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3420 switch (power_mode){ 3421 case HCI_POWER_ON: 3422 hci_power_transition_to_initializing(); 3423 break; 3424 case HCI_POWER_OFF: 3425 // do nothing 3426 break; 3427 case HCI_POWER_SLEEP: 3428 // see hci_run 3429 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3430 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3431 break; 3432 default: 3433 btstack_assert(false); 3434 break; 3435 } 3436 return ERROR_CODE_SUCCESS; 3437 } 3438 3439 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3440 switch (power_mode){ 3441 case HCI_POWER_ON: 3442 3443 #ifdef HAVE_PLATFORM_IPHONE_OS 3444 // nothing to do, if H4 supports power management 3445 if (btstack_control_iphone_power_management_enabled()){ 3446 hci_stack->state = HCI_STATE_INITIALIZING; 3447 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3448 break; 3449 } 3450 #endif 3451 hci_power_transition_to_initializing(); 3452 break; 3453 case HCI_POWER_OFF: 3454 // see hci_run 3455 hci_stack->state = HCI_STATE_HALTING; 3456 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3457 break; 3458 case HCI_POWER_SLEEP: 3459 // do nothing 3460 break; 3461 default: 3462 btstack_assert(false); 3463 break; 3464 } 3465 return ERROR_CODE_SUCCESS; 3466 } 3467 3468 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3469 int err; 3470 switch (power_mode){ 3471 case HCI_POWER_ON: 3472 #ifdef HAVE_PLATFORM_IPHONE_OS 3473 // nothing to do, if H4 supports power management 3474 if (btstack_control_iphone_power_management_enabled()){ 3475 hci_stack->state = HCI_STATE_INITIALIZING; 3476 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3477 hci_update_scan_enable(); 3478 break; 3479 } 3480 #endif 3481 err = hci_power_control_wake(); 3482 if (err) return err; 3483 hci_power_transition_to_initializing(); 3484 break; 3485 case HCI_POWER_OFF: 3486 hci_stack->state = HCI_STATE_HALTING; 3487 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3488 break; 3489 case HCI_POWER_SLEEP: 3490 // do nothing 3491 break; 3492 default: 3493 btstack_assert(false); 3494 break; 3495 } 3496 return ERROR_CODE_SUCCESS; 3497 } 3498 3499 int hci_power_control(HCI_POWER_MODE power_mode){ 3500 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3501 int err; 3502 switch (hci_stack->state){ 3503 case HCI_STATE_OFF: 3504 err = hci_power_control_state_off(power_mode); 3505 break; 3506 case HCI_STATE_INITIALIZING: 3507 err = hci_power_control_state_initializing(power_mode); 3508 break; 3509 case HCI_STATE_WORKING: 3510 err = hci_power_control_state_working(power_mode); 3511 break; 3512 case HCI_STATE_HALTING: 3513 err = hci_power_control_state_halting(power_mode); 3514 break; 3515 case HCI_STATE_FALLING_ASLEEP: 3516 err = hci_power_control_state_falling_asleep(power_mode); 3517 break; 3518 case HCI_STATE_SLEEPING: 3519 err = hci_power_control_state_sleeping(power_mode); 3520 break; 3521 default: 3522 btstack_assert(false); 3523 break; 3524 } 3525 if (err){ 3526 return err; 3527 } 3528 3529 // create internal event 3530 hci_emit_state(); 3531 3532 // trigger next/first action 3533 hci_run(); 3534 3535 return 0; 3536 } 3537 3538 3539 #ifdef ENABLE_CLASSIC 3540 3541 static void hci_update_scan_enable(void){ 3542 // 2 = page scan, 1 = inq scan 3543 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3544 hci_run(); 3545 } 3546 3547 void gap_discoverable_control(uint8_t enable){ 3548 if (enable) enable = 1; // normalize argument 3549 3550 if (hci_stack->discoverable == enable){ 3551 hci_emit_discoverable_enabled(hci_stack->discoverable); 3552 return; 3553 } 3554 3555 hci_stack->discoverable = enable; 3556 hci_update_scan_enable(); 3557 } 3558 3559 void gap_connectable_control(uint8_t enable){ 3560 if (enable) enable = 1; // normalize argument 3561 3562 // don't emit event 3563 if (hci_stack->connectable == enable) return; 3564 3565 hci_stack->connectable = enable; 3566 hci_update_scan_enable(); 3567 } 3568 #endif 3569 3570 void gap_local_bd_addr(bd_addr_t address_buffer){ 3571 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3572 } 3573 3574 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3575 static void hci_host_num_completed_packets(void){ 3576 3577 // create packet manually as arrays are not supported and num_commands should not get reduced 3578 hci_reserve_packet_buffer(); 3579 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3580 3581 uint16_t size = 0; 3582 uint16_t num_handles = 0; 3583 packet[size++] = 0x35; 3584 packet[size++] = 0x0c; 3585 size++; // skip param len 3586 size++; // skip num handles 3587 3588 // add { handle, packets } entries 3589 btstack_linked_item_t * it; 3590 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3591 hci_connection_t * connection = (hci_connection_t *) it; 3592 if (connection->num_packets_completed){ 3593 little_endian_store_16(packet, size, connection->con_handle); 3594 size += 2; 3595 little_endian_store_16(packet, size, connection->num_packets_completed); 3596 size += 2; 3597 // 3598 num_handles++; 3599 connection->num_packets_completed = 0; 3600 } 3601 } 3602 3603 packet[2] = size - 3; 3604 packet[3] = num_handles; 3605 3606 hci_stack->host_completed_packets = 0; 3607 3608 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3609 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3610 3611 // release packet buffer for synchronous transport implementations 3612 if (hci_transport_synchronous()){ 3613 hci_release_packet_buffer(); 3614 hci_emit_transport_packet_sent(); 3615 } 3616 } 3617 #endif 3618 3619 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3620 UNUSED(ds); 3621 hci_stack->substate = HCI_HALTING_CLOSE; 3622 // allow packet handlers to defer final shutdown 3623 hci_emit_state(); 3624 hci_run(); 3625 } 3626 3627 static bool hci_run_acl_fragments(void){ 3628 if (hci_stack->acl_fragmentation_total_size > 0u) { 3629 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3630 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3631 if (connection) { 3632 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3633 hci_send_acl_packet_fragments(connection); 3634 return true; 3635 } 3636 } else { 3637 // connection gone -> discard further fragments 3638 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3639 hci_stack->acl_fragmentation_total_size = 0; 3640 hci_stack->acl_fragmentation_pos = 0; 3641 } 3642 } 3643 return false; 3644 } 3645 3646 #ifdef ENABLE_CLASSIC 3647 static bool hci_run_general_gap_classic(void){ 3648 3649 // decline incoming connections 3650 if (hci_stack->decline_reason){ 3651 uint8_t reason = hci_stack->decline_reason; 3652 hci_stack->decline_reason = 0; 3653 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3654 return true; 3655 } 3656 // send scan enable 3657 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3658 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3659 hci_stack->new_scan_enable_value = 0xff; 3660 return true; 3661 } 3662 // start/stop inquiry 3663 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3664 uint8_t duration = hci_stack->inquiry_state; 3665 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3666 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3667 return true; 3668 } 3669 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3670 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3671 hci_send_cmd(&hci_inquiry_cancel); 3672 return true; 3673 } 3674 // remote name request 3675 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3676 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3677 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3678 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3679 return true; 3680 } 3681 // pairing 3682 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3683 uint8_t state = hci_stack->gap_pairing_state; 3684 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3685 switch (state){ 3686 case GAP_PAIRING_STATE_SEND_PIN: 3687 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); 3688 break; 3689 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3690 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3691 break; 3692 case GAP_PAIRING_STATE_SEND_PASSKEY: 3693 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3694 break; 3695 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3696 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3697 break; 3698 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3699 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3700 break; 3701 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3702 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3703 break; 3704 default: 3705 break; 3706 } 3707 return true; 3708 } 3709 return false; 3710 } 3711 #endif 3712 3713 #ifdef ENABLE_BLE 3714 static bool hci_run_general_gap_le(void){ 3715 3716 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3717 3718 if (hci_stack->state != HCI_STATE_WORKING) return false; 3719 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3720 3721 3722 // Phase 1: collect what to stop 3723 3724 bool scanning_stop = false; 3725 bool connecting_stop = false; 3726 bool advertising_stop = false; 3727 3728 #ifndef ENABLE_LE_CENTRAL 3729 UNUSED(scanning_stop); 3730 UNUSED(connecting_stop); 3731 #endif 3732 #ifndef ENABLE_LE_PERIPHERAL 3733 UNUSED(advertising_stop); 3734 #endif 3735 3736 // check if whitelist needs modification 3737 bool whitelist_modification_pending = false; 3738 btstack_linked_list_iterator_t lit; 3739 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3740 while (btstack_linked_list_iterator_has_next(&lit)){ 3741 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3742 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3743 whitelist_modification_pending = true; 3744 break; 3745 } 3746 } 3747 // check if resolving list needs modification 3748 bool resolving_list_modification_pending = false; 3749 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3750 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3751 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3752 resolving_list_modification_pending = true; 3753 } 3754 #endif 3755 3756 #ifdef ENABLE_LE_CENTRAL 3757 // scanning control 3758 if (hci_stack->le_scanning_active) { 3759 // stop if: 3760 // - parameter change required 3761 // - it's disabled 3762 // - whitelist change required but used for scanning 3763 // - resolving list modified 3764 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3765 if ((hci_stack->le_scanning_param_update) || 3766 !hci_stack->le_scanning_enabled || 3767 scanning_uses_whitelist || 3768 resolving_list_modification_pending){ 3769 3770 scanning_stop = true; 3771 } 3772 } 3773 #endif 3774 3775 #ifdef ENABLE_LE_CENTRAL 3776 // connecting control 3777 bool connecting_with_whitelist; 3778 switch (hci_stack->le_connecting_state){ 3779 case LE_CONNECTING_DIRECT: 3780 case LE_CONNECTING_WHITELIST: 3781 // stop connecting if: 3782 // - connecting uses white and whitelist modification pending 3783 // - if it got disabled 3784 // - resolving list modified 3785 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3786 if ((connecting_with_whitelist && whitelist_modification_pending) || 3787 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3788 resolving_list_modification_pending) { 3789 3790 connecting_stop = true; 3791 } 3792 break; 3793 default: 3794 break; 3795 } 3796 #endif 3797 3798 #ifdef ENABLE_LE_PERIPHERAL 3799 // le advertisement control 3800 if (hci_stack->le_advertisements_active){ 3801 // stop if: 3802 // - parameter change required 3803 // - it's disabled 3804 // - whitelist change required but used for advertisement filter policy 3805 // - resolving list modified 3806 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3807 if ((hci_stack->le_advertisements_todo != 0) || 3808 !hci_stack->le_advertisements_enabled_for_current_roles || 3809 (advertising_uses_whitelist & whitelist_modification_pending) || 3810 resolving_list_modification_pending) { 3811 3812 advertising_stop = true; 3813 } 3814 } 3815 #endif 3816 3817 3818 // Phase 2: stop everything that should be off during modifications 3819 3820 #ifdef ENABLE_LE_CENTRAL 3821 if (scanning_stop){ 3822 hci_stack->le_scanning_active = false; 3823 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3824 return true; 3825 } 3826 #endif 3827 3828 #ifdef ENABLE_LE_CENTRAL 3829 if (connecting_stop){ 3830 hci_send_cmd(&hci_le_create_connection_cancel); 3831 return true; 3832 } 3833 #endif 3834 3835 #ifdef ENABLE_LE_PERIPHERAL 3836 if (advertising_stop){ 3837 hci_stack->le_advertisements_active = false; 3838 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3839 return true; 3840 } 3841 #endif 3842 3843 // Phase 3: modify 3844 3845 #ifdef ENABLE_LE_CENTRAL 3846 if (hci_stack->le_scanning_param_update){ 3847 hci_stack->le_scanning_param_update = false; 3848 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3849 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3850 return true; 3851 } 3852 #endif 3853 3854 #ifdef ENABLE_LE_PERIPHERAL 3855 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3856 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3857 hci_send_cmd(&hci_le_set_advertising_parameters, 3858 hci_stack->le_advertisements_interval_min, 3859 hci_stack->le_advertisements_interval_max, 3860 hci_stack->le_advertisements_type, 3861 hci_stack->le_own_addr_type, 3862 hci_stack->le_advertisements_direct_address_type, 3863 hci_stack->le_advertisements_direct_address, 3864 hci_stack->le_advertisements_channel_map, 3865 hci_stack->le_advertisements_filter_policy); 3866 return true; 3867 } 3868 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3869 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3870 uint8_t adv_data_clean[31]; 3871 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3872 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3873 hci_stack->le_advertisements_data_len); 3874 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3875 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3876 return true; 3877 } 3878 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3879 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3880 uint8_t scan_data_clean[31]; 3881 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3882 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3883 hci_stack->le_scan_response_data_len); 3884 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3885 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3886 return true; 3887 } 3888 #endif 3889 3890 3891 #ifdef ENABLE_LE_CENTRAL 3892 // if connect with whitelist was active and is not cancelled yet, wait until next time 3893 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3894 #endif 3895 3896 // LE Whitelist Management 3897 if (whitelist_modification_pending){ 3898 // add/remove entries 3899 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3900 while (btstack_linked_list_iterator_has_next(&lit)){ 3901 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3902 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3903 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3904 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3905 return true; 3906 } 3907 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3908 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3909 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3910 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3911 return true; 3912 } 3913 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3914 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3915 btstack_memory_whitelist_entry_free(entry); 3916 } 3917 } 3918 } 3919 3920 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3921 // LE Resolving List Management 3922 if (resolving_list_supported) { 3923 uint16_t i; 3924 switch (hci_stack->le_resolving_list_state) { 3925 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3926 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3927 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3928 return true; 3929 case LE_RESOLVING_LIST_READ_SIZE: 3930 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3931 hci_send_cmd(&hci_le_read_resolving_list_size); 3932 return true; 3933 case LE_RESOLVING_LIST_SEND_CLEAR: 3934 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3935 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3936 sizeof(hci_stack->le_resolving_list_add_entries)); 3937 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3938 sizeof(hci_stack->le_resolving_list_remove_entries)); 3939 hci_send_cmd(&hci_le_clear_resolving_list); 3940 return true; 3941 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3942 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3943 uint8_t offset = i >> 3; 3944 uint8_t mask = 1 << (i & 7); 3945 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3946 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3947 bd_addr_t peer_identity_addreses; 3948 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3949 sm_key_t peer_irk; 3950 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3951 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3952 3953 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3954 // trigger whitelist entry 'update' (work around for controller bug) 3955 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3956 while (btstack_linked_list_iterator_has_next(&lit)) { 3957 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3958 if (entry->address_type != peer_identity_addr_type) continue; 3959 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3960 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3961 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3962 } 3963 #endif 3964 3965 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 3966 peer_identity_addreses); 3967 return true; 3968 } 3969 3970 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3971 3972 /* fall through */ 3973 3974 case LE_RESOLVING_LIST_ADD_ENTRIES: 3975 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3976 uint8_t offset = i >> 3; 3977 uint8_t mask = 1 << (i & 7); 3978 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3979 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3980 bd_addr_t peer_identity_addreses; 3981 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3982 sm_key_t peer_irk; 3983 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3984 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3985 const uint8_t *local_irk = gap_get_persistent_irk(); 3986 // command uses format specifier 'P' that stores 16-byte value without flip 3987 uint8_t local_irk_flipped[16]; 3988 uint8_t peer_irk_flipped[16]; 3989 reverse_128(local_irk, local_irk_flipped); 3990 reverse_128(peer_irk, peer_irk_flipped); 3991 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 3992 peer_irk_flipped, local_irk_flipped); 3993 return true; 3994 } 3995 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3996 break; 3997 3998 default: 3999 break; 4000 } 4001 } 4002 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4003 #endif 4004 4005 // Phase 4: restore state 4006 4007 #ifdef ENABLE_LE_CENTRAL 4008 // re-start scanning 4009 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4010 hci_stack->le_scanning_active = true; 4011 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4012 return true; 4013 } 4014 #endif 4015 4016 #ifdef ENABLE_LE_CENTRAL 4017 // re-start connecting 4018 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4019 bd_addr_t null_addr; 4020 memset(null_addr, 0, 6); 4021 hci_send_cmd(&hci_le_create_connection, 4022 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4023 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4024 1, // use whitelist 4025 0, // peer address type 4026 null_addr, // peer bd addr 4027 hci_stack->le_own_addr_type, // our addr type: 4028 hci_stack->le_connection_interval_min, // conn interval min 4029 hci_stack->le_connection_interval_max, // conn interval max 4030 hci_stack->le_connection_latency, // conn latency 4031 hci_stack->le_supervision_timeout, // conn latency 4032 hci_stack->le_minimum_ce_length, // min ce length 4033 hci_stack->le_maximum_ce_length // max ce length 4034 ); 4035 return true; 4036 } 4037 #endif 4038 4039 #ifdef ENABLE_LE_PERIPHERAL 4040 // re-start advertising 4041 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4042 // check if advertisements should be enabled given 4043 hci_stack->le_advertisements_active = true; 4044 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4045 return true; 4046 } 4047 #endif 4048 4049 return false; 4050 } 4051 #endif 4052 4053 static bool hci_run_general_pending_commands(void){ 4054 btstack_linked_item_t * it; 4055 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4056 hci_connection_t * connection = (hci_connection_t *) it; 4057 4058 switch(connection->state){ 4059 case SEND_CREATE_CONNECTION: 4060 switch(connection->address_type){ 4061 #ifdef ENABLE_CLASSIC 4062 case BD_ADDR_TYPE_ACL: 4063 log_info("sending hci_create_connection"); 4064 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4065 break; 4066 #endif 4067 default: 4068 #ifdef ENABLE_BLE 4069 #ifdef ENABLE_LE_CENTRAL 4070 log_info("sending hci_le_create_connection"); 4071 hci_send_cmd(&hci_le_create_connection, 4072 hci_stack->le_connection_scan_interval, // conn scan interval 4073 hci_stack->le_connection_scan_window, // conn scan windows 4074 0, // don't use whitelist 4075 connection->address_type, // peer address type 4076 connection->address, // peer bd addr 4077 hci_stack->le_own_addr_type, // our addr type: 4078 hci_stack->le_connection_interval_min, // conn interval min 4079 hci_stack->le_connection_interval_max, // conn interval max 4080 hci_stack->le_connection_latency, // conn latency 4081 hci_stack->le_supervision_timeout, // conn latency 4082 hci_stack->le_minimum_ce_length, // min ce length 4083 hci_stack->le_maximum_ce_length // max ce length 4084 ); 4085 connection->state = SENT_CREATE_CONNECTION; 4086 #endif 4087 #endif 4088 break; 4089 } 4090 return true; 4091 4092 #ifdef ENABLE_CLASSIC 4093 case RECEIVED_CONNECTION_REQUEST: 4094 connection->role = HCI_ROLE_SLAVE; 4095 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4096 log_info("sending hci_accept_connection_request"); 4097 connection->state = ACCEPTED_CONNECTION_REQUEST; 4098 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4099 } 4100 return true; 4101 #endif 4102 4103 #ifdef ENABLE_BLE 4104 #ifdef ENABLE_LE_CENTRAL 4105 case SEND_CANCEL_CONNECTION: 4106 connection->state = SENT_CANCEL_CONNECTION; 4107 hci_send_cmd(&hci_le_create_connection_cancel); 4108 return true; 4109 #endif 4110 #endif 4111 case SEND_DISCONNECT: 4112 connection->state = SENT_DISCONNECT; 4113 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4114 return true; 4115 4116 default: 4117 break; 4118 } 4119 4120 // no further commands if connection is about to get shut down 4121 if (connection->state == SENT_DISCONNECT) continue; 4122 4123 if (connection->authentication_flags & READ_RSSI){ 4124 connectionClearAuthenticationFlags(connection, READ_RSSI); 4125 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4126 return true; 4127 } 4128 4129 #ifdef ENABLE_CLASSIC 4130 4131 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4132 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4133 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4134 return true; 4135 } 4136 4137 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4138 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4139 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4140 4141 link_key_t link_key; 4142 link_key_type_t link_key_type; 4143 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4144 4145 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4146 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4147 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4148 if (sc_downgrade){ 4149 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4150 connection->state = SENT_DISCONNECT; 4151 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4152 return true; 4153 } 4154 4155 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4156 if (have_link_key && security_level_sufficient){ 4157 connection->link_key_type = link_key_type; 4158 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4159 } else { 4160 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4161 } 4162 return true; 4163 } 4164 4165 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4166 log_info("denying to pin request"); 4167 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4168 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4169 return true; 4170 } 4171 4172 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4173 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4174 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4175 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4176 // tweak authentication requirements 4177 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4178 if (connection->bonding_flags & BONDING_DEDICATED){ 4179 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4180 } 4181 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4182 authreq |= 1; 4183 } 4184 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4185 } else { 4186 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4187 } 4188 return true; 4189 } 4190 4191 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4192 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4193 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4194 return true; 4195 } 4196 4197 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4198 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4199 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4200 return true; 4201 } 4202 4203 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4204 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4205 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4206 return true; 4207 } 4208 4209 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4210 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4211 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4212 return true; 4213 } 4214 4215 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4216 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4217 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4218 return true; 4219 } 4220 4221 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4222 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4223 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4224 connection->state = SENT_DISCONNECT; 4225 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4226 return true; 4227 } 4228 4229 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4230 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4231 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4232 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4233 return true; 4234 } 4235 4236 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4237 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4238 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4239 return true; 4240 } 4241 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4242 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4243 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4244 return true; 4245 } 4246 #endif 4247 4248 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4249 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4250 if (connection->state != SENT_DISCONNECT){ 4251 connection->state = SENT_DISCONNECT; 4252 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4253 return true; 4254 } 4255 } 4256 4257 #ifdef ENABLE_CLASSIC 4258 uint16_t sniff_min_interval; 4259 switch (connection->sniff_min_interval){ 4260 case 0: 4261 break; 4262 case 0xffff: 4263 connection->sniff_min_interval = 0; 4264 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4265 return true; 4266 default: 4267 sniff_min_interval = connection->sniff_min_interval; 4268 connection->sniff_min_interval = 0; 4269 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4270 return true; 4271 } 4272 4273 if (connection->request_role != HCI_ROLE_INVALID){ 4274 hci_role_t role = connection->request_role; 4275 connection->request_role = HCI_ROLE_INVALID; 4276 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4277 return true; 4278 } 4279 #endif 4280 4281 #ifdef ENABLE_BLE 4282 switch (connection->le_con_parameter_update_state){ 4283 // response to L2CAP CON PARAMETER UPDATE REQUEST 4284 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4285 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4286 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4287 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4288 0x0000, 0xffff); 4289 return true; 4290 case CON_PARAMETER_UPDATE_REPLY: 4291 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4292 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4293 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4294 0x0000, 0xffff); 4295 return true; 4296 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4297 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4298 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4299 return true; 4300 default: 4301 break; 4302 } 4303 if (connection->le_phy_update_all_phys != 0xffu){ 4304 uint8_t all_phys = connection->le_phy_update_all_phys; 4305 connection->le_phy_update_all_phys = 0xff; 4306 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); 4307 return true; 4308 } 4309 #endif 4310 } 4311 return false; 4312 } 4313 4314 static void hci_run(void){ 4315 4316 bool done; 4317 4318 // send continuation fragments first, as they block the prepared packet buffer 4319 done = hci_run_acl_fragments(); 4320 if (done) return; 4321 4322 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4323 // send host num completed packets next as they don't require num_cmd_packets > 0 4324 if (!hci_can_send_comand_packet_transport()) return; 4325 if (hci_stack->host_completed_packets){ 4326 hci_host_num_completed_packets(); 4327 return; 4328 } 4329 #endif 4330 4331 if (!hci_can_send_command_packet_now()) return; 4332 4333 // global/non-connection oriented commands 4334 4335 4336 #ifdef ENABLE_CLASSIC 4337 // general gap classic 4338 done = hci_run_general_gap_classic(); 4339 if (done) return; 4340 #endif 4341 4342 #ifdef ENABLE_BLE 4343 // general gap le 4344 done = hci_run_general_gap_le(); 4345 if (done) return; 4346 #endif 4347 4348 // send pending HCI commands 4349 done = hci_run_general_pending_commands(); 4350 if (done) return; 4351 4352 // stack state sub statemachines 4353 hci_connection_t * connection; 4354 switch (hci_stack->state){ 4355 case HCI_STATE_INITIALIZING: 4356 hci_initializing_run(); 4357 break; 4358 4359 case HCI_STATE_HALTING: 4360 4361 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4362 switch (hci_stack->substate){ 4363 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4364 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4365 4366 #ifdef ENABLE_BLE 4367 #ifdef ENABLE_LE_CENTRAL 4368 // free whitelist entries 4369 { 4370 btstack_linked_list_iterator_t lit; 4371 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4372 while (btstack_linked_list_iterator_has_next(&lit)){ 4373 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4374 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4375 btstack_memory_whitelist_entry_free(entry); 4376 } 4377 } 4378 #endif 4379 #endif 4380 // close all open connections 4381 connection = (hci_connection_t *) hci_stack->connections; 4382 if (connection){ 4383 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4384 if (!hci_can_send_command_packet_now()) return; 4385 4386 // check state 4387 if (connection->state == SENT_DISCONNECT) return; 4388 connection->state = SENT_DISCONNECT; 4389 4390 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4391 4392 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4393 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4394 4395 // ... which would be ignored anyway as we shutdown (free) the connection now 4396 hci_shutdown_connection(connection); 4397 4398 // finally, send the disconnect command 4399 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4400 return; 4401 } 4402 4403 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4404 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4405 log_info("HCI_STATE_HALTING: wait 50 ms"); 4406 hci_stack->substate = HCI_HALTING_W4_TIMER; 4407 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4408 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4409 btstack_run_loop_add_timer(&hci_stack->timeout); 4410 break; 4411 } 4412 4413 /* fall through */ 4414 4415 case HCI_HALTING_CLOSE: 4416 log_info("HCI_STATE_HALTING, calling off"); 4417 4418 // switch mode 4419 hci_power_control_off(); 4420 4421 log_info("HCI_STATE_HALTING, emitting state"); 4422 hci_emit_state(); 4423 log_info("HCI_STATE_HALTING, done"); 4424 break; 4425 4426 case HCI_HALTING_W4_TIMER: 4427 // keep waiting 4428 4429 break; 4430 default: 4431 break; 4432 } 4433 4434 break; 4435 4436 case HCI_STATE_FALLING_ASLEEP: 4437 switch(hci_stack->substate) { 4438 case HCI_FALLING_ASLEEP_DISCONNECT: 4439 log_info("HCI_STATE_FALLING_ASLEEP"); 4440 // close all open connections 4441 connection = (hci_connection_t *) hci_stack->connections; 4442 4443 #ifdef HAVE_PLATFORM_IPHONE_OS 4444 // don't close connections, if H4 supports power management 4445 if (btstack_control_iphone_power_management_enabled()){ 4446 connection = NULL; 4447 } 4448 #endif 4449 if (connection){ 4450 4451 // send disconnect 4452 if (!hci_can_send_command_packet_now()) return; 4453 4454 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4455 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4456 4457 // send disconnected event right away - causes higher layer connections to get closed, too. 4458 hci_shutdown_connection(connection); 4459 return; 4460 } 4461 4462 if (hci_classic_supported()){ 4463 // disable page and inquiry scan 4464 if (!hci_can_send_command_packet_now()) return; 4465 4466 log_info("HCI_STATE_HALTING, disabling inq scans"); 4467 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4468 4469 // continue in next sub state 4470 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4471 break; 4472 } 4473 4474 /* fall through */ 4475 4476 case HCI_FALLING_ASLEEP_COMPLETE: 4477 log_info("HCI_STATE_HALTING, calling sleep"); 4478 #ifdef HAVE_PLATFORM_IPHONE_OS 4479 // don't actually go to sleep, if H4 supports power management 4480 if (btstack_control_iphone_power_management_enabled()){ 4481 // SLEEP MODE reached 4482 hci_stack->state = HCI_STATE_SLEEPING; 4483 hci_emit_state(); 4484 break; 4485 } 4486 #endif 4487 // switch mode 4488 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4489 hci_emit_state(); 4490 break; 4491 4492 default: 4493 break; 4494 } 4495 break; 4496 4497 default: 4498 break; 4499 } 4500 } 4501 4502 int hci_send_cmd_packet(uint8_t *packet, int size){ 4503 // house-keeping 4504 4505 #ifdef ENABLE_CLASSIC 4506 bd_addr_t addr; 4507 hci_connection_t * conn; 4508 #endif 4509 #ifdef ENABLE_LE_CENTRAL 4510 uint8_t initiator_filter_policy; 4511 #endif 4512 4513 uint16_t opcode = little_endian_read_16(packet, 0); 4514 switch (opcode) { 4515 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4516 hci_stack->loopback_mode = packet[3]; 4517 break; 4518 4519 #ifdef ENABLE_CLASSIC 4520 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4521 reverse_bd_addr(&packet[3], addr); 4522 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4523 4524 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4525 if (!conn) { 4526 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4527 if (!conn) { 4528 // notify client that alloc failed 4529 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4530 return -1; // packet not sent to controller 4531 } 4532 conn->state = SEND_CREATE_CONNECTION; 4533 conn->role = HCI_ROLE_MASTER; 4534 } 4535 log_info("conn state %u", conn->state); 4536 switch (conn->state) { 4537 // if connection active exists 4538 case OPEN: 4539 // and OPEN, emit connection complete command 4540 hci_emit_connection_complete(addr, conn->con_handle, 0); 4541 return -1; // packet not sent to controller 4542 case RECEIVED_DISCONNECTION_COMPLETE: 4543 // create connection triggered in disconnect complete event, let's do it now 4544 break; 4545 case SEND_CREATE_CONNECTION: 4546 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4547 break; 4548 default: 4549 // otherwise, just ignore as it is already in the open process 4550 return -1; // packet not sent to controller 4551 } 4552 conn->state = SENT_CREATE_CONNECTION; 4553 4554 // track outgoing connection 4555 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4556 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4557 break; 4558 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4559 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4560 break; 4561 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4562 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4563 break; 4564 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4565 if (hci_stack->link_key_db) { 4566 reverse_bd_addr(&packet[3], addr); 4567 hci_stack->link_key_db->delete_link_key(addr); 4568 } 4569 break; 4570 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4571 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4572 reverse_bd_addr(&packet[3], addr); 4573 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4574 if (conn) { 4575 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4576 } 4577 break; 4578 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4579 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4580 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4581 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4582 reverse_bd_addr(&packet[3], addr); 4583 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4584 if (conn) { 4585 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4586 } 4587 break; 4588 4589 #ifdef ENABLE_SCO_OVER_HCI 4590 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4591 // setup_synchronous_connection? Voice setting at offset 22 4592 // TODO: compare to current setting if sco connection already active 4593 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4594 break; 4595 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4596 // accept_synchronus_connection? Voice setting at offset 18 4597 // TODO: compare to current setting if sco connection already active 4598 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4599 break; 4600 #endif 4601 #endif 4602 4603 #ifdef ENABLE_BLE 4604 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4605 hci_stack->le_random_address_set = 1; 4606 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4607 break; 4608 #ifdef ENABLE_LE_PERIPHERAL 4609 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4610 hci_stack->le_advertisements_active = packet[3] != 0; 4611 break; 4612 #endif 4613 #ifdef ENABLE_LE_CENTRAL 4614 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4615 // white list used? 4616 initiator_filter_policy = packet[7]; 4617 switch (initiator_filter_policy) { 4618 case 0: 4619 // whitelist not used 4620 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4621 break; 4622 case 1: 4623 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4624 break; 4625 default: 4626 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4627 break; 4628 } 4629 // track outgoing connection 4630 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4631 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4632 break; 4633 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4634 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4635 break; 4636 #endif 4637 #endif 4638 default: 4639 break; 4640 } 4641 4642 hci_stack->num_cmd_packets--; 4643 4644 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4645 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4646 } 4647 4648 // disconnect because of security block 4649 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4650 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4651 if (!connection) return; 4652 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4653 } 4654 4655 4656 // Configure Secure Simple Pairing 4657 4658 #ifdef ENABLE_CLASSIC 4659 4660 // enable will enable SSP during init 4661 void gap_ssp_set_enable(int enable){ 4662 hci_stack->ssp_enable = enable; 4663 } 4664 4665 static int hci_local_ssp_activated(void){ 4666 return gap_ssp_supported() && hci_stack->ssp_enable; 4667 } 4668 4669 // if set, BTstack will respond to io capability request using authentication requirement 4670 void gap_ssp_set_io_capability(int io_capability){ 4671 hci_stack->ssp_io_capability = io_capability; 4672 } 4673 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4674 hci_stack->ssp_authentication_requirement = authentication_requirement; 4675 } 4676 4677 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4678 void gap_ssp_set_auto_accept(int auto_accept){ 4679 hci_stack->ssp_auto_accept = auto_accept; 4680 } 4681 4682 void gap_secure_connections_enable(bool enable){ 4683 hci_stack->secure_connections_enable = enable; 4684 } 4685 4686 #endif 4687 4688 // va_list part of hci_send_cmd 4689 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4690 if (!hci_can_send_command_packet_now()){ 4691 log_error("hci_send_cmd called but cannot send packet now"); 4692 return 0; 4693 } 4694 4695 // for HCI INITIALIZATION 4696 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4697 hci_stack->last_cmd_opcode = cmd->opcode; 4698 4699 hci_reserve_packet_buffer(); 4700 uint8_t * packet = hci_stack->hci_packet_buffer; 4701 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4702 int err = hci_send_cmd_packet(packet, size); 4703 4704 // release packet buffer on error or for synchronous transport implementations 4705 if ((err < 0) || hci_transport_synchronous()){ 4706 hci_release_packet_buffer(); 4707 hci_emit_transport_packet_sent(); 4708 } 4709 4710 return err; 4711 } 4712 4713 /** 4714 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4715 */ 4716 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4717 va_list argptr; 4718 va_start(argptr, cmd); 4719 int res = hci_send_cmd_va_arg(cmd, argptr); 4720 va_end(argptr); 4721 return res; 4722 } 4723 4724 // Create various non-HCI events. 4725 // TODO: generalize, use table similar to hci_create_command 4726 4727 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4728 // dump packet 4729 if (dump) { 4730 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4731 } 4732 4733 // dispatch to all event handlers 4734 btstack_linked_list_iterator_t it; 4735 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4736 while (btstack_linked_list_iterator_has_next(&it)){ 4737 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4738 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4739 } 4740 } 4741 4742 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4743 if (!hci_stack->acl_packet_handler) return; 4744 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4745 } 4746 4747 #ifdef ENABLE_CLASSIC 4748 static void hci_notify_if_sco_can_send_now(void){ 4749 // notify SCO sender if waiting 4750 if (!hci_stack->sco_waiting_for_can_send_now) return; 4751 if (hci_can_send_sco_packet_now()){ 4752 hci_stack->sco_waiting_for_can_send_now = 0; 4753 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4754 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4755 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4756 } 4757 } 4758 4759 // parsing end emitting has been merged to reduce code size 4760 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4761 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4762 4763 uint8_t * eir_data; 4764 ad_context_t context; 4765 const uint8_t * name; 4766 uint8_t name_len; 4767 4768 if (size < 3) return; 4769 4770 int event_type = hci_event_packet_get_type(packet); 4771 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4772 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4773 4774 switch (event_type){ 4775 case HCI_EVENT_INQUIRY_RESULT: 4776 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4777 if (size != (3 + (num_responses * 14))) return; 4778 break; 4779 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4780 if (size != 257) return; 4781 if (num_responses != 1) return; 4782 break; 4783 default: 4784 return; 4785 } 4786 4787 // event[1] is set at the end 4788 int i; 4789 for (i=0; i<num_responses;i++){ 4790 memset(event, 0, sizeof(event)); 4791 event[0] = GAP_EVENT_INQUIRY_RESULT; 4792 uint8_t event_size = 18; // if name is not set by EIR 4793 4794 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4795 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4796 (void)memcpy(&event[9], 4797 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4798 3); // class of device 4799 (void)memcpy(&event[12], 4800 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4801 2); // clock offset 4802 4803 switch (event_type){ 4804 case HCI_EVENT_INQUIRY_RESULT: 4805 // 14,15,16,17 = 0, size 18 4806 break; 4807 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4808 event[14] = 1; 4809 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4810 // 16,17 = 0, size 18 4811 break; 4812 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4813 event[14] = 1; 4814 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4815 // EIR packets only contain a single inquiry response 4816 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4817 name = NULL; 4818 // Iterate over EIR data 4819 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4820 uint8_t data_type = ad_iterator_get_data_type(&context); 4821 uint8_t data_size = ad_iterator_get_data_len(&context); 4822 const uint8_t * data = ad_iterator_get_data(&context); 4823 // Prefer Complete Local Name over Shortend Local Name 4824 switch (data_type){ 4825 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4826 if (name) continue; 4827 /* fall through */ 4828 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4829 name = data; 4830 name_len = data_size; 4831 break; 4832 default: 4833 break; 4834 } 4835 } 4836 if (name){ 4837 event[16] = 1; 4838 // truncate name if needed 4839 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4840 event[17] = len; 4841 (void)memcpy(&event[18], name, len); 4842 event_size += len; 4843 } 4844 break; 4845 default: 4846 return; 4847 } 4848 event[1] = event_size - 2; 4849 hci_emit_event(event, event_size, 1); 4850 } 4851 } 4852 #endif 4853 4854 void hci_emit_state(void){ 4855 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4856 uint8_t event[3]; 4857 event[0] = BTSTACK_EVENT_STATE; 4858 event[1] = sizeof(event) - 2u; 4859 event[2] = hci_stack->state; 4860 hci_emit_event(event, sizeof(event), 1); 4861 } 4862 4863 #ifdef ENABLE_CLASSIC 4864 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4865 uint8_t event[13]; 4866 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4867 event[1] = sizeof(event) - 2; 4868 event[2] = status; 4869 little_endian_store_16(event, 3, con_handle); 4870 reverse_bd_addr(address, &event[5]); 4871 event[11] = 1; // ACL connection 4872 event[12] = 0; // encryption disabled 4873 hci_emit_event(event, sizeof(event), 1); 4874 } 4875 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4876 if (disable_l2cap_timeouts) return; 4877 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4878 uint8_t event[4]; 4879 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4880 event[1] = sizeof(event) - 2; 4881 little_endian_store_16(event, 2, conn->con_handle); 4882 hci_emit_event(event, sizeof(event), 1); 4883 } 4884 #endif 4885 4886 #ifdef ENABLE_BLE 4887 #ifdef ENABLE_LE_CENTRAL 4888 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){ 4889 uint8_t event[21]; 4890 event[0] = HCI_EVENT_LE_META; 4891 event[1] = sizeof(event) - 2u; 4892 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4893 event[3] = status; 4894 little_endian_store_16(event, 4, con_handle); 4895 event[6] = 0; // TODO: role 4896 event[7] = address_type; 4897 reverse_bd_addr(address, &event[8]); 4898 little_endian_store_16(event, 14, 0); // interval 4899 little_endian_store_16(event, 16, 0); // latency 4900 little_endian_store_16(event, 18, 0); // supervision timeout 4901 event[20] = 0; // master clock accuracy 4902 hci_emit_event(event, sizeof(event), 1); 4903 } 4904 #endif 4905 #endif 4906 4907 static void hci_emit_transport_packet_sent(void){ 4908 // notify upper stack that it might be possible to send again 4909 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4910 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4911 } 4912 4913 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4914 uint8_t event[6]; 4915 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4916 event[1] = sizeof(event) - 2u; 4917 event[2] = 0; // status = OK 4918 little_endian_store_16(event, 3, con_handle); 4919 event[5] = reason; 4920 hci_emit_event(event, sizeof(event), 1); 4921 } 4922 4923 static void hci_emit_nr_connections_changed(void){ 4924 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4925 uint8_t event[3]; 4926 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4927 event[1] = sizeof(event) - 2u; 4928 event[2] = nr_hci_connections(); 4929 hci_emit_event(event, sizeof(event), 1); 4930 } 4931 4932 static void hci_emit_hci_open_failed(void){ 4933 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4934 uint8_t event[2]; 4935 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4936 event[1] = sizeof(event) - 2u; 4937 hci_emit_event(event, sizeof(event), 1); 4938 } 4939 4940 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4941 log_info("hci_emit_dedicated_bonding_result %u ", status); 4942 uint8_t event[9]; 4943 int pos = 0; 4944 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4945 event[pos++] = sizeof(event) - 2u; 4946 event[pos++] = status; 4947 reverse_bd_addr(address, &event[pos]); 4948 hci_emit_event(event, sizeof(event), 1); 4949 } 4950 4951 4952 #ifdef ENABLE_CLASSIC 4953 4954 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4955 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4956 uint8_t event[5]; 4957 int pos = 0; 4958 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4959 event[pos++] = sizeof(event) - 2; 4960 little_endian_store_16(event, 2, con_handle); 4961 pos += 2; 4962 event[pos++] = level; 4963 hci_emit_event(event, sizeof(event), 1); 4964 } 4965 4966 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4967 if (!connection) return LEVEL_0; 4968 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4969 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4970 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4971 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4972 // LEVEL 4 always requires 128 bit encrytion key size 4973 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4974 security_level = LEVEL_3; 4975 } 4976 return security_level; 4977 } 4978 4979 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4980 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4981 uint8_t event[3]; 4982 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4983 event[1] = sizeof(event) - 2; 4984 event[2] = enabled; 4985 hci_emit_event(event, sizeof(event), 1); 4986 } 4987 4988 // query if remote side supports eSCO 4989 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4990 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4991 if (!connection) return 0; 4992 return (connection->remote_supported_features[0] & 1) != 0; 4993 } 4994 4995 static bool hci_ssp_supported(hci_connection_t * connection){ 4996 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4997 return (connection->bonding_flags & mask) == mask; 4998 } 4999 5000 // query if remote side supports SSP 5001 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5002 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5003 if (!connection) return 0; 5004 return hci_ssp_supported(connection) ? 1 : 0; 5005 } 5006 5007 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5008 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5009 } 5010 5011 // GAP API 5012 /** 5013 * @bbrief enable/disable bonding. default is enabled 5014 * @praram enabled 5015 */ 5016 void gap_set_bondable_mode(int enable){ 5017 hci_stack->bondable = enable ? 1 : 0; 5018 } 5019 /** 5020 * @brief Get bondable mode. 5021 * @return 1 if bondable 5022 */ 5023 int gap_get_bondable_mode(void){ 5024 return hci_stack->bondable; 5025 } 5026 5027 /** 5028 * @brief map link keys to security levels 5029 */ 5030 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5031 switch (link_key_type){ 5032 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5033 return LEVEL_4; 5034 case COMBINATION_KEY: 5035 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5036 return LEVEL_3; 5037 default: 5038 return LEVEL_2; 5039 } 5040 } 5041 5042 /** 5043 * @brief map link keys to secure connection yes/no 5044 */ 5045 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5046 switch (link_key_type){ 5047 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5048 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5049 return 1; 5050 default: 5051 return 0; 5052 } 5053 } 5054 5055 /** 5056 * @brief map link keys to authenticated 5057 */ 5058 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5059 switch (link_key_type){ 5060 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5061 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5062 return 1; 5063 default: 5064 return 0; 5065 } 5066 } 5067 5068 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5069 log_info("gap_mitm_protection_required_for_security_level %u", level); 5070 return level > LEVEL_2; 5071 } 5072 5073 /** 5074 * @brief get current security level 5075 */ 5076 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5077 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5078 if (!connection) return LEVEL_0; 5079 return gap_security_level_for_connection(connection); 5080 } 5081 5082 /** 5083 * @brief request connection to device to 5084 * @result GAP_AUTHENTICATION_RESULT 5085 */ 5086 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5087 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5088 if (!connection){ 5089 hci_emit_security_level(con_handle, LEVEL_0); 5090 return; 5091 } 5092 5093 btstack_assert(hci_is_le_connection(connection) == false); 5094 5095 gap_security_level_t current_level = gap_security_level(con_handle); 5096 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5097 requested_level, connection->requested_security_level, current_level); 5098 5099 // assumption: earlier requested security higher than current level => security request is active 5100 if (current_level < connection->requested_security_level){ 5101 if (connection->requested_security_level < requested_level){ 5102 // increase requested level as new level is higher 5103 5104 // TODO: handle re-authentication when done 5105 5106 connection->requested_security_level = requested_level; 5107 } 5108 return; 5109 } 5110 5111 // no request active, notify if security sufficient 5112 if (requested_level <= current_level){ 5113 hci_emit_security_level(con_handle, current_level); 5114 return; 5115 } 5116 5117 // store request 5118 connection->requested_security_level = requested_level; 5119 5120 // start to authenticate connection if authentication not already active 5121 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5122 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5123 hci_run(); 5124 } 5125 5126 /** 5127 * @brief start dedicated bonding with device. disconnect after bonding 5128 * @param device 5129 * @param request MITM protection 5130 * @result GAP_DEDICATED_BONDING_COMPLETE 5131 */ 5132 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5133 5134 // create connection state machine 5135 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5136 5137 if (!connection){ 5138 return BTSTACK_MEMORY_ALLOC_FAILED; 5139 } 5140 5141 // delete linkn key 5142 gap_drop_link_key_for_bd_addr(device); 5143 5144 // configure LEVEL_2/3, dedicated bonding 5145 connection->state = SEND_CREATE_CONNECTION; 5146 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5147 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5148 connection->bonding_flags = BONDING_DEDICATED; 5149 5150 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5151 5152 // handle: connnection failure (connection complete != ok) 5153 // handle: authentication failure 5154 // handle: disconnect on done 5155 5156 hci_run(); 5157 5158 return 0; 5159 } 5160 #endif 5161 5162 void gap_set_local_name(const char * local_name){ 5163 hci_stack->local_name = local_name; 5164 } 5165 5166 5167 #ifdef ENABLE_BLE 5168 5169 #ifdef ENABLE_LE_CENTRAL 5170 void gap_start_scan(void){ 5171 hci_stack->le_scanning_enabled = true; 5172 hci_run(); 5173 } 5174 5175 void gap_stop_scan(void){ 5176 hci_stack->le_scanning_enabled = false; 5177 hci_run(); 5178 } 5179 5180 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5181 hci_stack->le_scan_type = scan_type; 5182 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5183 hci_stack->le_scan_interval = scan_interval; 5184 hci_stack->le_scan_window = scan_window; 5185 hci_stack->le_scanning_param_update = true; 5186 hci_run(); 5187 } 5188 5189 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5190 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5191 } 5192 5193 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5194 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5195 if (!conn){ 5196 // disallow if le connection is already outgoing 5197 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5198 log_error("le connection already active"); 5199 return ERROR_CODE_COMMAND_DISALLOWED; 5200 } 5201 5202 log_info("gap_connect: no connection exists yet, creating context"); 5203 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5204 if (!conn){ 5205 // notify client that alloc failed 5206 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5207 log_info("gap_connect: failed to alloc hci_connection_t"); 5208 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5209 } 5210 5211 // set le connecting state 5212 if (hci_is_le_connection_type(addr_type)){ 5213 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5214 } 5215 5216 conn->state = SEND_CREATE_CONNECTION; 5217 log_info("gap_connect: send create connection next"); 5218 hci_run(); 5219 return ERROR_CODE_SUCCESS; 5220 } 5221 5222 if (!hci_is_le_connection(conn) || 5223 (conn->state == SEND_CREATE_CONNECTION) || 5224 (conn->state == SENT_CREATE_CONNECTION)) { 5225 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5226 log_error("gap_connect: classic connection or connect is already being created"); 5227 return GATT_CLIENT_IN_WRONG_STATE; 5228 } 5229 5230 // check if connection was just disconnected 5231 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5232 log_info("gap_connect: send create connection (again)"); 5233 conn->state = SEND_CREATE_CONNECTION; 5234 hci_run(); 5235 return ERROR_CODE_SUCCESS; 5236 } 5237 5238 log_info("gap_connect: context exists with state %u", conn->state); 5239 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5240 hci_run(); 5241 return ERROR_CODE_SUCCESS; 5242 } 5243 5244 // @assumption: only a single outgoing LE Connection exists 5245 static hci_connection_t * gap_get_outgoing_connection(void){ 5246 btstack_linked_item_t *it; 5247 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5248 hci_connection_t * conn = (hci_connection_t *) it; 5249 if (!hci_is_le_connection(conn)) continue; 5250 switch (conn->state){ 5251 case SEND_CREATE_CONNECTION: 5252 case SENT_CREATE_CONNECTION: 5253 case SENT_CANCEL_CONNECTION: 5254 return conn; 5255 default: 5256 break; 5257 }; 5258 } 5259 return NULL; 5260 } 5261 5262 uint8_t gap_connect_cancel(void){ 5263 hci_connection_t * conn = gap_get_outgoing_connection(); 5264 if (!conn) return 0; 5265 switch (conn->state){ 5266 case SEND_CREATE_CONNECTION: 5267 // skip sending create connection and emit event instead 5268 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5269 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5270 btstack_memory_hci_connection_free( conn ); 5271 break; 5272 case SENT_CREATE_CONNECTION: 5273 // request to send cancel connection 5274 conn->state = SEND_CANCEL_CONNECTION; 5275 hci_run(); 5276 break; 5277 default: 5278 break; 5279 } 5280 return 0; 5281 } 5282 #endif 5283 5284 #ifdef ENABLE_LE_CENTRAL 5285 /** 5286 * @brief Set connection parameters for outgoing connections 5287 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5288 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5289 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5290 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5291 * @param conn_latency, default: 4 5292 * @param supervision_timeout (unit: 10ms), default: 720 ms 5293 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5294 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5295 */ 5296 5297 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5298 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5299 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5300 hci_stack->le_connection_scan_interval = conn_scan_interval; 5301 hci_stack->le_connection_scan_window = conn_scan_window; 5302 hci_stack->le_connection_interval_min = conn_interval_min; 5303 hci_stack->le_connection_interval_max = conn_interval_max; 5304 hci_stack->le_connection_latency = conn_latency; 5305 hci_stack->le_supervision_timeout = supervision_timeout; 5306 hci_stack->le_minimum_ce_length = min_ce_length; 5307 hci_stack->le_maximum_ce_length = max_ce_length; 5308 } 5309 #endif 5310 5311 /** 5312 * @brief Updates the connection parameters for a given LE connection 5313 * @param handle 5314 * @param conn_interval_min (unit: 1.25ms) 5315 * @param conn_interval_max (unit: 1.25ms) 5316 * @param conn_latency 5317 * @param supervision_timeout (unit: 10ms) 5318 * @returns 0 if ok 5319 */ 5320 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5321 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5322 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5323 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5324 connection->le_conn_interval_min = conn_interval_min; 5325 connection->le_conn_interval_max = conn_interval_max; 5326 connection->le_conn_latency = conn_latency; 5327 connection->le_supervision_timeout = supervision_timeout; 5328 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5329 hci_run(); 5330 return 0; 5331 } 5332 5333 /** 5334 * @brief Request an update of the connection parameter for a given LE connection 5335 * @param handle 5336 * @param conn_interval_min (unit: 1.25ms) 5337 * @param conn_interval_max (unit: 1.25ms) 5338 * @param conn_latency 5339 * @param supervision_timeout (unit: 10ms) 5340 * @returns 0 if ok 5341 */ 5342 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5343 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5344 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5345 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5346 connection->le_conn_interval_min = conn_interval_min; 5347 connection->le_conn_interval_max = conn_interval_max; 5348 connection->le_conn_latency = conn_latency; 5349 connection->le_supervision_timeout = supervision_timeout; 5350 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5351 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5352 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5353 return 0; 5354 } 5355 5356 #ifdef ENABLE_LE_PERIPHERAL 5357 5358 /** 5359 * @brief Set Advertisement Data 5360 * @param advertising_data_length 5361 * @param advertising_data (max 31 octets) 5362 * @note data is not copied, pointer has to stay valid 5363 */ 5364 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5365 hci_stack->le_advertisements_data_len = advertising_data_length; 5366 hci_stack->le_advertisements_data = advertising_data; 5367 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5368 hci_run(); 5369 } 5370 5371 /** 5372 * @brief Set Scan Response Data 5373 * @param advertising_data_length 5374 * @param advertising_data (max 31 octets) 5375 * @note data is not copied, pointer has to stay valid 5376 */ 5377 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5378 hci_stack->le_scan_response_data_len = scan_response_data_length; 5379 hci_stack->le_scan_response_data = scan_response_data; 5380 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5381 hci_run(); 5382 } 5383 5384 /** 5385 * @brief Set Advertisement Parameters 5386 * @param adv_int_min 5387 * @param adv_int_max 5388 * @param adv_type 5389 * @param direct_address_type 5390 * @param direct_address 5391 * @param channel_map 5392 * @param filter_policy 5393 * 5394 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5395 */ 5396 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5397 uint8_t direct_address_typ, bd_addr_t direct_address, 5398 uint8_t channel_map, uint8_t filter_policy) { 5399 5400 hci_stack->le_advertisements_interval_min = adv_int_min; 5401 hci_stack->le_advertisements_interval_max = adv_int_max; 5402 hci_stack->le_advertisements_type = adv_type; 5403 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5404 hci_stack->le_advertisements_channel_map = channel_map; 5405 hci_stack->le_advertisements_filter_policy = filter_policy; 5406 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5407 6); 5408 5409 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5410 hci_run(); 5411 } 5412 5413 /** 5414 * @brief Enable/Disable Advertisements 5415 * @param enabled 5416 */ 5417 void gap_advertisements_enable(int enabled){ 5418 hci_stack->le_advertisements_enabled = enabled != 0; 5419 hci_update_advertisements_enabled_for_current_roles(); 5420 hci_run(); 5421 } 5422 5423 #endif 5424 5425 void hci_le_set_own_address_type(uint8_t own_address_type){ 5426 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5427 if (own_address_type == hci_stack->le_own_addr_type) return; 5428 hci_stack->le_own_addr_type = own_address_type; 5429 5430 #ifdef ENABLE_LE_PERIPHERAL 5431 // update advertisement parameters, too 5432 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5433 hci_run(); 5434 #endif 5435 #ifdef ENABLE_LE_CENTRAL 5436 // note: we don't update scan parameters or modify ongoing connection attempts 5437 #endif 5438 } 5439 5440 #endif 5441 5442 uint8_t gap_disconnect(hci_con_handle_t handle){ 5443 hci_connection_t * conn = hci_connection_for_handle(handle); 5444 if (!conn){ 5445 hci_emit_disconnection_complete(handle, 0); 5446 return 0; 5447 } 5448 // ignore if already disconnected 5449 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5450 return 0; 5451 } 5452 conn->state = SEND_DISCONNECT; 5453 hci_run(); 5454 return 0; 5455 } 5456 5457 int gap_read_rssi(hci_con_handle_t con_handle){ 5458 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5459 if (hci_connection == NULL) return 0; 5460 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5461 hci_run(); 5462 return 1; 5463 } 5464 5465 /** 5466 * @brief Get connection type 5467 * @param con_handle 5468 * @result connection_type 5469 */ 5470 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5471 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5472 if (!conn) return GAP_CONNECTION_INVALID; 5473 switch (conn->address_type){ 5474 case BD_ADDR_TYPE_LE_PUBLIC: 5475 case BD_ADDR_TYPE_LE_RANDOM: 5476 return GAP_CONNECTION_LE; 5477 case BD_ADDR_TYPE_SCO: 5478 return GAP_CONNECTION_SCO; 5479 case BD_ADDR_TYPE_ACL: 5480 return GAP_CONNECTION_ACL; 5481 default: 5482 return GAP_CONNECTION_INVALID; 5483 } 5484 } 5485 5486 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5487 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5488 if (!conn) return HCI_ROLE_INVALID; 5489 return (hci_role_t) conn->role; 5490 } 5491 5492 5493 #ifdef ENABLE_CLASSIC 5494 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5495 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5496 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5497 conn->request_role = role; 5498 hci_run(); 5499 return ERROR_CODE_SUCCESS; 5500 } 5501 #endif 5502 5503 #ifdef ENABLE_BLE 5504 5505 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){ 5506 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5507 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5508 5509 conn->le_phy_update_all_phys = all_phys; 5510 conn->le_phy_update_tx_phys = tx_phys; 5511 conn->le_phy_update_rx_phys = rx_phys; 5512 conn->le_phy_update_phy_options = phy_options; 5513 5514 hci_run(); 5515 5516 return 0; 5517 } 5518 5519 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5520 // check if already in list 5521 btstack_linked_list_iterator_t it; 5522 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5523 while (btstack_linked_list_iterator_has_next(&it)) { 5524 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5525 if (entry->address_type != address_type) { 5526 continue; 5527 } 5528 if (memcmp(entry->address, address, 6) != 0) { 5529 continue; 5530 } 5531 // disallow if already scheduled to add 5532 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5533 return ERROR_CODE_COMMAND_DISALLOWED; 5534 } 5535 // still on controller, but scheduled to remove -> re-add 5536 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5537 return ERROR_CODE_SUCCESS; 5538 } 5539 // alloc and add to list 5540 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5541 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5542 entry->address_type = address_type; 5543 (void)memcpy(entry->address, address, 6); 5544 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5545 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5546 return ERROR_CODE_SUCCESS; 5547 } 5548 5549 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5550 btstack_linked_list_iterator_t it; 5551 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5552 while (btstack_linked_list_iterator_has_next(&it)){ 5553 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5554 if (entry->address_type != address_type) { 5555 continue; 5556 } 5557 if (memcmp(entry->address, address, 6) != 0) { 5558 continue; 5559 } 5560 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5561 // remove from controller if already present 5562 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5563 } else { 5564 // directly remove entry from whitelist 5565 btstack_linked_list_iterator_remove(&it); 5566 btstack_memory_whitelist_entry_free(entry); 5567 } 5568 return ERROR_CODE_SUCCESS; 5569 } 5570 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5571 } 5572 5573 static void hci_whitelist_clear(void){ 5574 btstack_linked_list_iterator_t it; 5575 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5576 while (btstack_linked_list_iterator_has_next(&it)){ 5577 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5578 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5579 // remove from controller if already present 5580 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5581 continue; 5582 } 5583 // directly remove entry from whitelist 5584 btstack_linked_list_iterator_remove(&it); 5585 btstack_memory_whitelist_entry_free(entry); 5586 } 5587 } 5588 5589 /** 5590 * @brief Clear Whitelist 5591 * @returns 0 if ok 5592 */ 5593 uint8_t gap_whitelist_clear(void){ 5594 hci_whitelist_clear(); 5595 hci_run(); 5596 return ERROR_CODE_SUCCESS; 5597 } 5598 5599 /** 5600 * @brief Add Device to Whitelist 5601 * @param address_typ 5602 * @param address 5603 * @returns 0 if ok 5604 */ 5605 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5606 uint8_t status = hci_whitelist_add(address_type, address); 5607 if (status){ 5608 return status; 5609 } 5610 hci_run(); 5611 return ERROR_CODE_SUCCESS; 5612 } 5613 5614 /** 5615 * @brief Remove Device from Whitelist 5616 * @param address_typ 5617 * @param address 5618 * @returns 0 if ok 5619 */ 5620 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5621 uint8_t status = hci_whitelist_remove(address_type, address); 5622 if (status){ 5623 return status; 5624 } 5625 hci_run(); 5626 return ERROR_CODE_SUCCESS; 5627 } 5628 5629 #ifdef ENABLE_LE_CENTRAL 5630 /** 5631 * @brief Connect with Whitelist 5632 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5633 * @returns - if ok 5634 */ 5635 uint8_t gap_connect_with_whitelist(void){ 5636 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5637 return ERROR_CODE_COMMAND_DISALLOWED; 5638 } 5639 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5640 hci_run(); 5641 return ERROR_CODE_SUCCESS; 5642 } 5643 5644 /** 5645 * @brief Auto Connection Establishment - Start Connecting to device 5646 * @param address_typ 5647 * @param address 5648 * @returns 0 if ok 5649 */ 5650 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5651 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5652 return ERROR_CODE_COMMAND_DISALLOWED; 5653 } 5654 5655 uint8_t status = hci_whitelist_add(address_type, address); 5656 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5657 return status; 5658 } 5659 5660 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5661 5662 hci_run(); 5663 return ERROR_CODE_SUCCESS; 5664 } 5665 5666 /** 5667 * @brief Auto Connection Establishment - Stop Connecting to device 5668 * @param address_typ 5669 * @param address 5670 * @returns 0 if ok 5671 */ 5672 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5673 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5674 return ERROR_CODE_COMMAND_DISALLOWED; 5675 } 5676 5677 hci_whitelist_remove(address_type, address); 5678 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5679 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5680 } 5681 hci_run(); 5682 return 0; 5683 } 5684 5685 /** 5686 * @brief Auto Connection Establishment - Stop everything 5687 * @note Convenience function to stop all active auto connection attempts 5688 */ 5689 uint8_t gap_auto_connection_stop_all(void){ 5690 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5691 return ERROR_CODE_COMMAND_DISALLOWED; 5692 } 5693 hci_whitelist_clear(); 5694 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5695 hci_run(); 5696 return ERROR_CODE_SUCCESS; 5697 } 5698 5699 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5700 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5701 if (!conn) return 0; 5702 return conn->le_connection_interval; 5703 } 5704 #endif 5705 #endif 5706 5707 #ifdef ENABLE_CLASSIC 5708 /** 5709 * @brief Set Extended Inquiry Response data 5710 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5711 * @note has to be done before stack starts up 5712 */ 5713 void gap_set_extended_inquiry_response(const uint8_t * data){ 5714 hci_stack->eir_data = data; 5715 } 5716 5717 /** 5718 * @brief Start GAP Classic Inquiry 5719 * @param duration in 1.28s units 5720 * @return 0 if ok 5721 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5722 */ 5723 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5724 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5725 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5726 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5727 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5728 } 5729 hci_stack->inquiry_state = duration_in_1280ms_units; 5730 hci_run(); 5731 return 0; 5732 } 5733 5734 /** 5735 * @brief Stop GAP Classic Inquiry 5736 * @returns 0 if ok 5737 */ 5738 int gap_inquiry_stop(void){ 5739 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5740 // emit inquiry complete event, before it even started 5741 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5742 hci_emit_event(event, sizeof(event), 1); 5743 return 0; 5744 } 5745 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5746 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5747 hci_run(); 5748 return 0; 5749 } 5750 5751 5752 /** 5753 * @brief Remote Name Request 5754 * @param addr 5755 * @param page_scan_repetition_mode 5756 * @param clock_offset only used when bit 15 is set 5757 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5758 */ 5759 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5760 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5761 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5762 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5763 hci_stack->remote_name_clock_offset = clock_offset; 5764 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5765 hci_run(); 5766 return 0; 5767 } 5768 5769 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5770 hci_stack->gap_pairing_state = state; 5771 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5772 hci_run(); 5773 return 0; 5774 } 5775 5776 /** 5777 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5778 * @param addr 5779 * @param pin_data 5780 * @param pin_len 5781 * @return 0 if ok 5782 */ 5783 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5784 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5785 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5786 hci_stack->gap_pairing_pin_len = pin_len; 5787 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5788 } 5789 5790 /** 5791 * @brief Legacy Pairing Pin Code Response 5792 * @param addr 5793 * @param pin 5794 * @return 0 if ok 5795 */ 5796 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5797 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5798 } 5799 5800 /** 5801 * @brief Abort Legacy Pairing 5802 * @param addr 5803 * @param pin 5804 * @return 0 if ok 5805 */ 5806 int gap_pin_code_negative(bd_addr_t addr){ 5807 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5808 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5809 } 5810 5811 /** 5812 * @brief SSP Passkey Response 5813 * @param addr 5814 * @param passkey 5815 * @return 0 if ok 5816 */ 5817 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5818 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5819 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5820 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5821 } 5822 5823 /** 5824 * @brief Abort SSP Passkey Entry/Pairing 5825 * @param addr 5826 * @param pin 5827 * @return 0 if ok 5828 */ 5829 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5830 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5831 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5832 } 5833 5834 /** 5835 * @brief Accept SSP Numeric Comparison 5836 * @param addr 5837 * @param passkey 5838 * @return 0 if ok 5839 */ 5840 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5841 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5842 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5843 } 5844 5845 /** 5846 * @brief Abort SSP Numeric Comparison/Pairing 5847 * @param addr 5848 * @param pin 5849 * @return 0 if ok 5850 */ 5851 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5852 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5853 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5854 } 5855 5856 /** 5857 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5858 * @param inquiry_mode see bluetooth_defines.h 5859 */ 5860 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5861 hci_stack->inquiry_mode = mode; 5862 } 5863 5864 /** 5865 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5866 */ 5867 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5868 hci_stack->sco_voice_setting = voice_setting; 5869 } 5870 5871 /** 5872 * @brief Get SCO Voice Setting 5873 * @return current voice setting 5874 */ 5875 uint16_t hci_get_sco_voice_setting(void){ 5876 return hci_stack->sco_voice_setting; 5877 } 5878 5879 static int hci_have_usb_transport(void){ 5880 if (!hci_stack->hci_transport) return 0; 5881 const char * transport_name = hci_stack->hci_transport->name; 5882 if (!transport_name) return 0; 5883 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5884 } 5885 5886 /** @brief Get SCO packet length for current SCO Voice setting 5887 * @note Using SCO packets of the exact length is required for USB transfer 5888 * @return Length of SCO packets in bytes (not audio frames) 5889 */ 5890 int hci_get_sco_packet_length(void){ 5891 int sco_packet_length = 0; 5892 5893 #ifdef ENABLE_SCO_OVER_HCI 5894 5895 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5896 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5897 5898 if (hci_have_usb_transport()){ 5899 // see Core Spec for H2 USB Transfer. 5900 // 3 byte SCO header + 24 bytes per connection 5901 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5902 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5903 } else { 5904 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5905 sco_packet_length = 3 + 60 * multiplier; 5906 // assert that it still fits inside an SCO buffer 5907 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5908 sco_packet_length = 3 + 60; 5909 } 5910 } 5911 #endif 5912 return sco_packet_length; 5913 } 5914 5915 /** 5916 * @brief Sets the master/slave policy 5917 * @param policy (0: attempt to become master, 1: let connecting device decide) 5918 */ 5919 void hci_set_master_slave_policy(uint8_t policy){ 5920 hci_stack->master_slave_policy = policy; 5921 } 5922 5923 #endif 5924 5925 HCI_STATE hci_get_state(void){ 5926 return hci_stack->state; 5927 } 5928 5929 #ifdef ENABLE_CLASSIC 5930 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 5931 hci_stack->gap_classic_accept_callback = accept_callback; 5932 } 5933 #endif 5934 5935 /** 5936 * @brief Set callback for Bluetooth Hardware Error 5937 */ 5938 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5939 hci_stack->hardware_error_callback = fn; 5940 } 5941 5942 void hci_disconnect_all(void){ 5943 btstack_linked_list_iterator_t it; 5944 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5945 while (btstack_linked_list_iterator_has_next(&it)){ 5946 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5947 if (con->state == SENT_DISCONNECT) continue; 5948 con->state = SEND_DISCONNECT; 5949 } 5950 hci_run(); 5951 } 5952 5953 uint16_t hci_get_manufacturer(void){ 5954 return hci_stack->manufacturer; 5955 } 5956 5957 #ifdef ENABLE_BLE 5958 5959 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5960 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5961 if (!hci_con) return NULL; 5962 return &hci_con->sm_connection; 5963 } 5964 5965 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5966 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5967 5968 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5969 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5970 if (hci_connection == NULL) return 0; 5971 if (hci_is_le_connection(hci_connection)){ 5972 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5973 if (sm_conn->sm_connection_encrypted) { 5974 return sm_conn->sm_actual_encryption_key_size; 5975 } 5976 } 5977 #ifdef ENABLE_CLASSIC 5978 else { 5979 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5980 return hci_connection->encryption_key_size; 5981 } 5982 } 5983 #endif 5984 return 0; 5985 } 5986 5987 int gap_authenticated(hci_con_handle_t con_handle){ 5988 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5989 if (hci_connection == NULL) return 0; 5990 5991 switch (hci_connection->address_type){ 5992 case BD_ADDR_TYPE_LE_PUBLIC: 5993 case BD_ADDR_TYPE_LE_RANDOM: 5994 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5995 return hci_connection->sm_connection.sm_connection_authenticated; 5996 #ifdef ENABLE_CLASSIC 5997 case BD_ADDR_TYPE_SCO: 5998 case BD_ADDR_TYPE_ACL: 5999 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6000 #endif 6001 default: 6002 return 0; 6003 } 6004 } 6005 6006 int gap_secure_connection(hci_con_handle_t con_handle){ 6007 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6008 if (hci_connection == NULL) return 0; 6009 6010 switch (hci_connection->address_type){ 6011 case BD_ADDR_TYPE_LE_PUBLIC: 6012 case BD_ADDR_TYPE_LE_RANDOM: 6013 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6014 return hci_connection->sm_connection.sm_connection_sc; 6015 #ifdef ENABLE_CLASSIC 6016 case BD_ADDR_TYPE_SCO: 6017 case BD_ADDR_TYPE_ACL: 6018 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6019 #endif 6020 default: 6021 return 0; 6022 } 6023 } 6024 6025 bool gap_bonded(hci_con_handle_t con_handle){ 6026 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6027 if (hci_connection == NULL) return 0; 6028 6029 #ifdef ENABLE_CLASSIC 6030 link_key_t link_key; 6031 link_key_type_t link_key_type; 6032 #endif 6033 switch (hci_connection->address_type){ 6034 case BD_ADDR_TYPE_LE_PUBLIC: 6035 case BD_ADDR_TYPE_LE_RANDOM: 6036 return hci_connection->sm_connection.sm_le_db_index >= 0; 6037 #ifdef ENABLE_CLASSIC 6038 case BD_ADDR_TYPE_SCO: 6039 case BD_ADDR_TYPE_ACL: 6040 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6041 #endif 6042 default: 6043 return false; 6044 } 6045 } 6046 6047 6048 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6049 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6050 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6051 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6052 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6053 return sm_conn->sm_connection_authorization_state; 6054 } 6055 #endif 6056 6057 #ifdef ENABLE_CLASSIC 6058 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){ 6059 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6060 if (!conn) return GAP_CONNECTION_INVALID; 6061 conn->sniff_min_interval = sniff_min_interval; 6062 conn->sniff_max_interval = sniff_max_interval; 6063 conn->sniff_attempt = sniff_attempt; 6064 conn->sniff_timeout = sniff_timeout; 6065 hci_run(); 6066 return 0; 6067 } 6068 6069 /** 6070 * @brief Exit Sniff mode 6071 * @param con_handle 6072 @ @return 0 if ok 6073 */ 6074 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6075 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6076 if (!conn) return GAP_CONNECTION_INVALID; 6077 conn->sniff_min_interval = 0xffff; 6078 hci_run(); 6079 return 0; 6080 } 6081 #endif 6082 6083 void hci_halting_defer(void){ 6084 if (hci_stack->state != HCI_STATE_HALTING) return; 6085 switch (hci_stack->substate){ 6086 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6087 case HCI_HALTING_CLOSE: 6088 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6089 break; 6090 default: 6091 break; 6092 } 6093 } 6094 6095 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6096 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6097 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6098 if (le_device_db_index >= le_device_db_max_count()) return; 6099 uint8_t offset = le_device_db_index >> 3; 6100 uint8_t mask = 1 << (le_device_db_index & 7); 6101 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6102 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6103 // note: go back to remove entries, otherwise, a remove + add will skip the add 6104 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6105 } 6106 } 6107 6108 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6109 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6110 if (le_device_db_index >= le_device_db_max_count()) return; 6111 uint8_t offset = le_device_db_index >> 3; 6112 uint8_t mask = 1 << (le_device_db_index & 7); 6113 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6114 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6115 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6116 } 6117 } 6118 6119 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6120 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6121 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6122 } 6123 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6124 // restart le resolving list update 6125 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6126 } 6127 return ERROR_CODE_SUCCESS; 6128 } 6129 #endif 6130 6131 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6132 void hci_setup_test_connections_fuzz(void){ 6133 hci_connection_t * conn; 6134 6135 // default address: 66:55:44:33:00:01 6136 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6137 6138 // setup Controller info 6139 hci_stack->num_cmd_packets = 255; 6140 hci_stack->acl_packets_total_num = 255; 6141 6142 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6143 addr[5] = 0x01; 6144 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6145 conn->con_handle = addr[5]; 6146 conn->role = HCI_ROLE_SLAVE; 6147 conn->state = RECEIVED_CONNECTION_REQUEST; 6148 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6149 6150 // setup incoming Classic SCO connection with con handle 0x0002 6151 addr[5] = 0x02; 6152 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6153 conn->con_handle = addr[5]; 6154 conn->role = HCI_ROLE_SLAVE; 6155 conn->state = RECEIVED_CONNECTION_REQUEST; 6156 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6157 6158 // setup ready Classic ACL connection with con handle 0x0003 6159 addr[5] = 0x03; 6160 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6161 conn->con_handle = addr[5]; 6162 conn->role = HCI_ROLE_SLAVE; 6163 conn->state = OPEN; 6164 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6165 6166 // setup ready Classic SCO connection with con handle 0x0004 6167 addr[5] = 0x04; 6168 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6169 conn->con_handle = addr[5]; 6170 conn->role = HCI_ROLE_SLAVE; 6171 conn->state = OPEN; 6172 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6173 6174 // setup ready LE ACL connection with con handle 0x005 and public address 6175 addr[5] = 0x05; 6176 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6177 conn->con_handle = addr[5]; 6178 conn->role = HCI_ROLE_SLAVE; 6179 conn->state = OPEN; 6180 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6181 } 6182 6183 void hci_free_connections_fuzz(void){ 6184 btstack_linked_list_iterator_t it; 6185 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6186 while (btstack_linked_list_iterator_has_next(&it)){ 6187 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6188 btstack_linked_list_iterator_remove(&it); 6189 btstack_memory_hci_connection_free(con); 6190 } 6191 } 6192 void hci_simulate_working_fuzz(void){ 6193 hci_init_done(); 6194 hci_stack->num_cmd_packets = 255; 6195 } 6196 #endif 6197