1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #define HCI_CONNECTION_TIMEOUT_MS 10000 101 102 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 103 #define HCI_RESET_RESEND_TIMEOUT_MS 200 104 #endif 105 106 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 107 #ifndef GAP_INQUIRY_MAX_NAME_LEN 108 #define GAP_INQUIRY_MAX_NAME_LEN 32 109 #endif 110 111 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 112 #define GAP_INQUIRY_DURATION_MIN 0x01 113 #define GAP_INQUIRY_DURATION_MAX 0x30 114 #define GAP_INQUIRY_STATE_ACTIVE 0x80 115 #define GAP_INQUIRY_STATE_IDLE 0 116 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 117 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 118 119 // GAP Remote Name Request 120 #define GAP_REMOTE_NAME_STATE_IDLE 0 121 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 122 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 123 124 // GAP Pairing 125 #define GAP_PAIRING_STATE_IDLE 0 126 #define GAP_PAIRING_STATE_SEND_PIN 1 127 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 128 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 129 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 130 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 131 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 132 133 134 // prototypes 135 #ifdef ENABLE_CLASSIC 136 static void hci_update_scan_enable(void); 137 static void hci_emit_discoverable_enabled(uint8_t enabled); 138 static int hci_local_ssp_activated(void); 139 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 140 static bool hci_ssp_supported(hci_connection_t * connection); 141 static void hci_notify_if_sco_can_send_now(void); 142 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 143 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 144 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 145 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 146 static void hci_connection_timestamp(hci_connection_t *connection); 147 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 148 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 149 #endif 150 151 static int hci_power_control_on(void); 152 static void hci_power_control_off(void); 153 static void hci_state_reset(void); 154 static void hci_emit_transport_packet_sent(void); 155 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 156 static void hci_emit_nr_connections_changed(void); 157 static void hci_emit_hci_open_failed(void); 158 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 159 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 160 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 161 static void hci_run(void); 162 static int hci_is_le_connection(hci_connection_t * connection); 163 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 164 165 #ifdef ENABLE_CLASSIC 166 static int hci_have_usb_transport(void); 167 #endif 168 169 #ifdef ENABLE_BLE 170 #ifdef ENABLE_LE_CENTRAL 171 // called from test/ble_client/advertising_data_parser.c 172 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 173 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 174 static hci_connection_t * gap_get_outgoing_connection(void); 175 #endif 176 #endif 177 178 // the STACK is here 179 #ifndef HAVE_MALLOC 180 static hci_stack_t hci_stack_static; 181 #endif 182 static hci_stack_t * hci_stack = NULL; 183 184 #ifdef ENABLE_CLASSIC 185 // default name 186 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 187 188 // test helper 189 static uint8_t disable_l2cap_timeouts = 0; 190 #endif 191 192 /** 193 * create connection for given address 194 * 195 * @return connection OR NULL, if no memory left 196 */ 197 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 198 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 199 hci_connection_t * conn = btstack_memory_hci_connection_get(); 200 if (!conn) return NULL; 201 bd_addr_copy(conn->address, addr); 202 conn->role = HCI_ROLE_INVALID; 203 conn->address_type = addr_type; 204 conn->con_handle = 0xffff; 205 conn->authentication_flags = AUTH_FLAGS_NONE; 206 conn->bonding_flags = 0; 207 conn->requested_security_level = LEVEL_0; 208 #ifdef ENABLE_CLASSIC 209 conn->request_role = HCI_ROLE_INVALID; 210 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 211 btstack_run_loop_set_timer_context(&conn->timeout, conn); 212 hci_connection_timestamp(conn); 213 #endif 214 conn->acl_recombination_length = 0; 215 conn->acl_recombination_pos = 0; 216 conn->num_packets_sent = 0; 217 218 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 219 #ifdef ENABLE_BLE 220 conn->le_phy_update_all_phys = 0xff; 221 #endif 222 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 223 conn->le_max_tx_octets = 27; 224 #endif 225 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 226 return conn; 227 } 228 229 230 /** 231 * get le connection parameter range 232 * 233 * @return le connection parameter range struct 234 */ 235 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 236 *range = hci_stack->le_connection_parameter_range; 237 } 238 239 /** 240 * set le connection parameter range 241 * 242 */ 243 244 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 245 hci_stack->le_connection_parameter_range = *range; 246 } 247 248 /** 249 * @brief Test if connection parameters are inside in existing rage 250 * @param conn_interval_min (unit: 1.25ms) 251 * @param conn_interval_max (unit: 1.25ms) 252 * @param conn_latency 253 * @param supervision_timeout (unit: 10ms) 254 * @returns 1 if included 255 */ 256 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){ 257 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 258 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 259 260 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 261 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 262 263 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 264 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 265 266 return 1; 267 } 268 269 /** 270 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 271 * @note: default: 1 272 * @param max_peripheral_connections 273 */ 274 #ifdef ENABLE_LE_PERIPHERAL 275 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 276 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 277 } 278 #endif 279 280 /** 281 * get hci connections iterator 282 * 283 * @return hci connections iterator 284 */ 285 286 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 287 btstack_linked_list_iterator_init(it, &hci_stack->connections); 288 } 289 290 /** 291 * get connection for a given handle 292 * 293 * @return connection OR NULL, if not found 294 */ 295 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 296 btstack_linked_list_iterator_t it; 297 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 298 while (btstack_linked_list_iterator_has_next(&it)){ 299 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 300 if ( item->con_handle == con_handle ) { 301 return item; 302 } 303 } 304 return NULL; 305 } 306 307 /** 308 * get connection for given address 309 * 310 * @return connection OR NULL, if not found 311 */ 312 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 313 btstack_linked_list_iterator_t it; 314 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 315 while (btstack_linked_list_iterator_has_next(&it)){ 316 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 317 if (connection->address_type != addr_type) continue; 318 if (memcmp(addr, connection->address, 6) != 0) continue; 319 return connection; 320 } 321 return NULL; 322 } 323 324 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 326 } 327 328 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 329 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 330 } 331 332 #ifdef ENABLE_CLASSIC 333 334 #ifdef ENABLE_SCO_OVER_HCI 335 static int hci_number_sco_connections(void){ 336 int connections = 0; 337 btstack_linked_list_iterator_t it; 338 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 339 while (btstack_linked_list_iterator_has_next(&it)){ 340 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 341 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 342 connections++; 343 } 344 return connections; 345 } 346 #endif 347 348 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 349 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 350 #ifdef HAVE_EMBEDDED_TICK 351 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 352 // connections might be timed out 353 hci_emit_l2cap_check_timeout(connection); 354 } 355 #else 356 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 357 // connections might be timed out 358 hci_emit_l2cap_check_timeout(connection); 359 } 360 #endif 361 } 362 363 static void hci_connection_timestamp(hci_connection_t *connection){ 364 #ifdef HAVE_EMBEDDED_TICK 365 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 366 #else 367 connection->timestamp = btstack_run_loop_get_time_ms(); 368 #endif 369 } 370 371 /** 372 * add authentication flags and reset timer 373 * @note: assumes classic connection 374 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 375 */ 376 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 377 bd_addr_t addr; 378 reverse_bd_addr(bd_addr, addr); 379 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 380 if (conn) { 381 connectionSetAuthenticationFlags(conn, flags); 382 hci_connection_timestamp(conn); 383 } 384 } 385 386 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 387 hci_connection_t * conn = hci_connection_for_handle(handle); 388 if (!conn) return 0; 389 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 390 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 391 return 0; 392 } 393 394 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 397 hci_stack->link_key_db->delete_link_key(addr); 398 } 399 400 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 401 if (!hci_stack->link_key_db) return; 402 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 403 hci_stack->link_key_db->put_link_key(addr, link_key, type); 404 } 405 406 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 407 if (!hci_stack->link_key_db) return false; 408 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 409 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 410 return result; 411 } 412 413 void gap_delete_all_link_keys(void){ 414 bd_addr_t addr; 415 link_key_t link_key; 416 link_key_type_t type; 417 btstack_link_key_iterator_t it; 418 int ok = gap_link_key_iterator_init(&it); 419 if (!ok) { 420 log_error("could not initialize iterator"); 421 return; 422 } 423 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 424 gap_drop_link_key_for_bd_addr(addr); 425 } 426 gap_link_key_iterator_done(&it); 427 } 428 429 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 430 if (!hci_stack->link_key_db) return 0; 431 if (!hci_stack->link_key_db->iterator_init) return 0; 432 return hci_stack->link_key_db->iterator_init(it); 433 } 434 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){ 435 if (!hci_stack->link_key_db) return 0; 436 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 437 } 438 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 439 if (!hci_stack->link_key_db) return; 440 hci_stack->link_key_db->iterator_done(it); 441 } 442 #endif 443 444 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 445 switch (address_type){ 446 case BD_ADDR_TYPE_LE_PUBLIC: 447 case BD_ADDR_TYPE_LE_RANDOM: 448 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 449 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 450 return true; 451 default: 452 return false; 453 } 454 } 455 456 static int hci_is_le_connection(hci_connection_t * connection){ 457 return hci_is_le_connection_type(connection->address_type); 458 } 459 460 /** 461 * count connections 462 */ 463 static int nr_hci_connections(void){ 464 int count = 0; 465 btstack_linked_item_t *it; 466 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 467 count++; 468 } 469 return count; 470 } 471 472 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 473 474 unsigned int num_packets_sent_classic = 0; 475 unsigned int num_packets_sent_le = 0; 476 477 btstack_linked_item_t *it; 478 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 479 hci_connection_t * connection = (hci_connection_t *) it; 480 if (hci_is_le_connection(connection)){ 481 num_packets_sent_le += connection->num_packets_sent; 482 } 483 if (connection->address_type == BD_ADDR_TYPE_ACL){ 484 num_packets_sent_classic += connection->num_packets_sent; 485 } 486 } 487 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 488 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 489 int free_slots_le = 0; 490 491 if (free_slots_classic < 0){ 492 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); 493 return 0; 494 } 495 496 if (hci_stack->le_acl_packets_total_num){ 497 // if we have LE slots, they are used 498 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 499 if (free_slots_le < 0){ 500 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); 501 return 0; 502 } 503 } else { 504 // otherwise, classic slots are used for LE, too 505 free_slots_classic -= num_packets_sent_le; 506 if (free_slots_classic < 0){ 507 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); 508 return 0; 509 } 510 } 511 512 switch (address_type){ 513 case BD_ADDR_TYPE_UNKNOWN: 514 log_error("hci_number_free_acl_slots: unknown address type"); 515 return 0; 516 517 case BD_ADDR_TYPE_ACL: 518 return free_slots_classic; 519 520 default: 521 if (hci_stack->le_acl_packets_total_num){ 522 return free_slots_le; 523 } 524 return free_slots_classic; 525 } 526 } 527 528 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 529 // get connection type 530 hci_connection_t * connection = hci_connection_for_handle(con_handle); 531 if (!connection){ 532 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 533 return 0; 534 } 535 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 536 } 537 538 #ifdef ENABLE_CLASSIC 539 static int hci_number_free_sco_slots(void){ 540 unsigned int num_sco_packets_sent = 0; 541 btstack_linked_item_t *it; 542 if (hci_stack->synchronous_flow_control_enabled){ 543 // explicit flow control 544 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 545 hci_connection_t * connection = (hci_connection_t *) it; 546 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 547 num_sco_packets_sent += connection->num_packets_sent; 548 } 549 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 550 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 551 return 0; 552 } 553 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 554 } else { 555 // implicit flow control -- TODO 556 int num_ready = 0; 557 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 558 hci_connection_t * connection = (hci_connection_t *) it; 559 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 560 if (connection->sco_tx_ready == 0) continue; 561 num_ready++; 562 } 563 return num_ready; 564 } 565 } 566 #endif 567 568 // only used to send HCI Host Number Completed Packets 569 static int hci_can_send_comand_packet_transport(void){ 570 if (hci_stack->hci_packet_buffer_reserved) return 0; 571 572 // check for async hci transport implementations 573 if (hci_stack->hci_transport->can_send_packet_now){ 574 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 575 return 0; 576 } 577 } 578 return 1; 579 } 580 581 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 582 int hci_can_send_command_packet_now(void){ 583 if (hci_can_send_comand_packet_transport() == 0) return 0; 584 return hci_stack->num_cmd_packets > 0u; 585 } 586 587 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 588 // check for async hci transport implementations 589 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 590 return hci_stack->hci_transport->can_send_packet_now(packet_type); 591 } 592 593 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 594 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 595 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 596 } 597 598 int hci_can_send_acl_le_packet_now(void){ 599 if (hci_stack->hci_packet_buffer_reserved) return 0; 600 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 601 } 602 603 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 604 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 605 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 606 } 607 608 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 609 if (hci_stack->hci_packet_buffer_reserved) return 0; 610 return hci_can_send_prepared_acl_packet_now(con_handle); 611 } 612 613 #ifdef ENABLE_CLASSIC 614 int hci_can_send_acl_classic_packet_now(void){ 615 if (hci_stack->hci_packet_buffer_reserved) return 0; 616 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 617 } 618 619 int hci_can_send_prepared_sco_packet_now(void){ 620 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 621 if (hci_have_usb_transport()){ 622 return hci_stack->sco_can_send_now; 623 } else { 624 return hci_number_free_sco_slots() > 0; 625 } 626 } 627 628 int hci_can_send_sco_packet_now(void){ 629 if (hci_stack->hci_packet_buffer_reserved) return 0; 630 return hci_can_send_prepared_sco_packet_now(); 631 } 632 633 void hci_request_sco_can_send_now_event(void){ 634 hci_stack->sco_waiting_for_can_send_now = 1; 635 hci_notify_if_sco_can_send_now(); 636 } 637 #endif 638 639 // used for internal checks in l2cap.c 640 int hci_is_packet_buffer_reserved(void){ 641 return hci_stack->hci_packet_buffer_reserved; 642 } 643 644 // reserves outgoing packet buffer. @returns 1 if successful 645 int hci_reserve_packet_buffer(void){ 646 if (hci_stack->hci_packet_buffer_reserved) { 647 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 648 return 0; 649 } 650 hci_stack->hci_packet_buffer_reserved = 1; 651 return 1; 652 } 653 654 void hci_release_packet_buffer(void){ 655 hci_stack->hci_packet_buffer_reserved = 0; 656 } 657 658 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 659 static int hci_transport_synchronous(void){ 660 return hci_stack->hci_transport->can_send_packet_now == NULL; 661 } 662 663 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 664 665 // 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); 666 667 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 668 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 669 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 670 max_acl_data_packet_length = hci_stack->le_data_packets_length; 671 } 672 673 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 674 if (hci_is_le_connection(connection)){ 675 max_acl_data_packet_length = connection->le_max_tx_octets; 676 } 677 #endif 678 679 log_debug("hci_send_acl_packet_fragments entered"); 680 681 int err; 682 // multiple packets could be send on a synchronous HCI transport 683 while (true){ 684 685 log_debug("hci_send_acl_packet_fragments loop entered"); 686 687 // get current data 688 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 689 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 690 bool more_fragments = false; 691 692 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 693 if (current_acl_data_packet_length > max_acl_data_packet_length){ 694 more_fragments = true; 695 current_acl_data_packet_length = max_acl_data_packet_length; 696 } 697 698 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 699 if (acl_header_pos > 0u){ 700 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 701 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 703 } 704 705 // update header len 706 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 707 708 // count packet 709 connection->num_packets_sent++; 710 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 711 712 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 713 if (more_fragments){ 714 // update start of next fragment to send 715 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 716 } else { 717 // done 718 hci_stack->acl_fragmentation_pos = 0; 719 hci_stack->acl_fragmentation_total_size = 0; 720 } 721 722 // send packet 723 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 724 const int size = current_acl_data_packet_length + 4; 725 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 726 hci_stack->acl_fragmentation_tx_active = 1; 727 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 728 729 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 730 731 // done yet? 732 if (!more_fragments) break; 733 734 // can send more? 735 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 736 } 737 738 log_debug("hci_send_acl_packet_fragments loop over"); 739 740 // release buffer now for synchronous transport 741 if (hci_transport_synchronous()){ 742 hci_stack->acl_fragmentation_tx_active = 0; 743 hci_release_packet_buffer(); 744 hci_emit_transport_packet_sent(); 745 } 746 747 return err; 748 } 749 750 // pre: caller has reserved the packet buffer 751 int hci_send_acl_packet_buffer(int size){ 752 753 // log_info("hci_send_acl_packet_buffer size %u", size); 754 755 if (!hci_stack->hci_packet_buffer_reserved) { 756 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 757 return 0; 758 } 759 760 uint8_t * packet = hci_stack->hci_packet_buffer; 761 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 762 763 // check for free places on Bluetooth module 764 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 765 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 766 hci_release_packet_buffer(); 767 hci_emit_transport_packet_sent(); 768 return BTSTACK_ACL_BUFFERS_FULL; 769 } 770 771 hci_connection_t *connection = hci_connection_for_handle( con_handle); 772 if (!connection) { 773 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 774 hci_release_packet_buffer(); 775 hci_emit_transport_packet_sent(); 776 return 0; 777 } 778 779 #ifdef ENABLE_CLASSIC 780 hci_connection_timestamp(connection); 781 #endif 782 783 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 784 785 // setup data 786 hci_stack->acl_fragmentation_total_size = size; 787 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 788 789 return hci_send_acl_packet_fragments(connection); 790 } 791 792 #ifdef ENABLE_CLASSIC 793 // pre: caller has reserved the packet buffer 794 int hci_send_sco_packet_buffer(int size){ 795 796 // log_info("hci_send_acl_packet_buffer size %u", size); 797 798 if (!hci_stack->hci_packet_buffer_reserved) { 799 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 800 return 0; 801 } 802 803 uint8_t * packet = hci_stack->hci_packet_buffer; 804 805 // skip checks in loopback mode 806 if (!hci_stack->loopback_mode){ 807 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 808 809 // check for free places on Bluetooth module 810 if (!hci_can_send_prepared_sco_packet_now()) { 811 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 812 hci_release_packet_buffer(); 813 hci_emit_transport_packet_sent(); 814 return BTSTACK_ACL_BUFFERS_FULL; 815 } 816 817 // track send packet in connection struct 818 hci_connection_t *connection = hci_connection_for_handle( con_handle); 819 if (!connection) { 820 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 821 hci_release_packet_buffer(); 822 hci_emit_transport_packet_sent(); 823 return 0; 824 } 825 826 if (hci_have_usb_transport()){ 827 // token used 828 hci_stack->sco_can_send_now = 0; 829 } else { 830 if (hci_stack->synchronous_flow_control_enabled){ 831 connection->num_packets_sent++; 832 } else { 833 connection->sco_tx_ready--; 834 } 835 } 836 } 837 838 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 839 840 #ifdef HAVE_SCO_TRANSPORT 841 hci_stack->sco_transport->send_packet(packet, size); 842 hci_release_packet_buffer(); 843 hci_emit_transport_packet_sent(); 844 845 return 0; 846 #else 847 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 848 if (hci_transport_synchronous()){ 849 hci_release_packet_buffer(); 850 hci_emit_transport_packet_sent(); 851 } 852 853 return err; 854 #endif 855 } 856 #endif 857 858 static void acl_handler(uint8_t *packet, uint16_t size){ 859 860 // get info 861 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 862 hci_connection_t *conn = hci_connection_for_handle(con_handle); 863 uint8_t acl_flags = READ_ACL_FLAGS(packet); 864 uint16_t acl_length = READ_ACL_LENGTH(packet); 865 866 // ignore non-registered handle 867 if (!conn){ 868 log_error("acl_handler called with non-registered handle %u!" , con_handle); 869 return; 870 } 871 872 // assert packet is complete 873 if ((acl_length + 4u) != size){ 874 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 875 return; 876 } 877 878 #ifdef ENABLE_CLASSIC 879 // update idle timestamp 880 hci_connection_timestamp(conn); 881 #endif 882 883 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 884 hci_stack->host_completed_packets = 1; 885 conn->num_packets_completed++; 886 #endif 887 888 // handle different packet types 889 switch (acl_flags & 0x03u) { 890 891 case 0x01: // continuation fragment 892 893 // sanity checks 894 if (conn->acl_recombination_pos == 0u) { 895 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 896 return; 897 } 898 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 899 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 900 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 901 conn->acl_recombination_pos = 0; 902 return; 903 } 904 905 // append fragment payload (header already stored) 906 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 907 &packet[4], acl_length); 908 conn->acl_recombination_pos += acl_length; 909 910 // forward complete L2CAP packet if complete. 911 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 912 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 913 // reset recombination buffer 914 conn->acl_recombination_length = 0; 915 conn->acl_recombination_pos = 0; 916 } 917 break; 918 919 case 0x02: { // first fragment 920 921 // sanity check 922 if (conn->acl_recombination_pos) { 923 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 924 conn->acl_recombination_pos = 0; 925 } 926 927 // peek into L2CAP packet! 928 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 929 930 // compare fragment size to L2CAP packet size 931 if (acl_length >= (l2cap_length + 4u)){ 932 // forward fragment as L2CAP packet 933 hci_emit_acl_packet(packet, acl_length + 4u); 934 } else { 935 936 if (acl_length > HCI_ACL_BUFFER_SIZE){ 937 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 938 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 939 return; 940 } 941 942 // store first fragment and tweak acl length for complete package 943 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 944 packet, acl_length + 4u); 945 conn->acl_recombination_pos = acl_length + 4u; 946 conn->acl_recombination_length = l2cap_length; 947 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 948 } 949 break; 950 951 } 952 default: 953 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 954 return; 955 } 956 957 // execute main loop 958 hci_run(); 959 } 960 961 static void hci_shutdown_connection(hci_connection_t *conn){ 962 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 963 964 #ifdef ENABLE_CLASSIC 965 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 966 bd_addr_type_t addr_type = conn->address_type; 967 #endif 968 #ifdef HAVE_SCO_TRANSPORT 969 hci_con_handle_t con_handle = conn->con_handle; 970 #endif 971 #endif 972 973 btstack_run_loop_remove_timer(&conn->timeout); 974 975 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 976 btstack_memory_hci_connection_free( conn ); 977 978 // now it's gone 979 hci_emit_nr_connections_changed(); 980 981 #ifdef ENABLE_CLASSIC 982 #ifdef ENABLE_SCO_OVER_HCI 983 // update SCO 984 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 985 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 986 } 987 #endif 988 #ifdef HAVE_SCO_TRANSPORT 989 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 990 hci_stack->sco_transport->close(con_handle); 991 } 992 #endif 993 #endif 994 } 995 996 #ifdef ENABLE_CLASSIC 997 998 static const uint16_t packet_type_sizes[] = { 999 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1000 HCI_ACL_DH1_SIZE, 0, 0, 0, 1001 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1002 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1003 }; 1004 static const uint8_t packet_type_feature_requirement_bit[] = { 1005 0, // 3 slot packets 1006 1, // 5 slot packets 1007 25, // EDR 2 mpbs 1008 26, // EDR 3 mbps 1009 39, // 3 slot EDR packts 1010 40, // 5 slot EDR packet 1011 }; 1012 static const uint16_t packet_type_feature_packet_mask[] = { 1013 0x0f00, // 3 slot packets 1014 0xf000, // 5 slot packets 1015 0x1102, // EDR 2 mpbs 1016 0x2204, // EDR 3 mbps 1017 0x0300, // 3 slot EDR packts 1018 0x3000, // 5 slot EDR packet 1019 }; 1020 1021 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1022 // enable packet types based on size 1023 uint16_t packet_types = 0; 1024 unsigned int i; 1025 for (i=0;i<16;i++){ 1026 if (packet_type_sizes[i] == 0) continue; 1027 if (packet_type_sizes[i] <= buffer_size){ 1028 packet_types |= 1 << i; 1029 } 1030 } 1031 // disable packet types due to missing local supported features 1032 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1033 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1034 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1035 if (feature_set) continue; 1036 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1037 packet_types &= ~packet_type_feature_packet_mask[i]; 1038 } 1039 // flip bits for "may not be used" 1040 packet_types ^= 0x3306; 1041 return packet_types; 1042 } 1043 1044 uint16_t hci_usable_acl_packet_types(void){ 1045 return hci_stack->packet_types; 1046 } 1047 #endif 1048 1049 uint8_t* hci_get_outgoing_packet_buffer(void){ 1050 // hci packet buffer is >= acl data packet length 1051 return hci_stack->hci_packet_buffer; 1052 } 1053 1054 uint16_t hci_max_acl_data_packet_length(void){ 1055 return hci_stack->acl_data_packet_length; 1056 } 1057 1058 #ifdef ENABLE_CLASSIC 1059 int hci_extended_sco_link_supported(void){ 1060 // No. 31, byte 3, bit 7 1061 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1062 } 1063 #endif 1064 1065 int hci_non_flushable_packet_boundary_flag_supported(void){ 1066 // No. 54, byte 6, bit 6 1067 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1068 } 1069 1070 static int gap_ssp_supported(void){ 1071 // No. 51, byte 6, bit 3 1072 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1073 } 1074 1075 static int hci_classic_supported(void){ 1076 #ifdef ENABLE_CLASSIC 1077 // No. 37, byte 4, bit 5, = No BR/EDR Support 1078 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1079 #else 1080 return 0; 1081 #endif 1082 } 1083 1084 static int hci_le_supported(void){ 1085 #ifdef ENABLE_BLE 1086 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1087 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1088 #else 1089 return 0; 1090 #endif 1091 } 1092 1093 #ifdef ENABLE_BLE 1094 1095 /** 1096 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1097 */ 1098 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1099 *addr_type = hci_stack->le_own_addr_type; 1100 if (hci_stack->le_own_addr_type){ 1101 (void)memcpy(addr, hci_stack->le_random_address, 6); 1102 } else { 1103 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1104 } 1105 } 1106 1107 #ifdef ENABLE_LE_CENTRAL 1108 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1109 1110 int offset = 3; 1111 int num_reports = packet[offset]; 1112 offset += 1; 1113 1114 int i; 1115 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1116 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1117 for (i=0; (i<num_reports) && (offset < size);i++){ 1118 // sanity checks on data_length: 1119 uint8_t data_length = packet[offset + 8]; 1120 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1121 if ((offset + 9u + data_length + 1u) > size) return; 1122 // setup event 1123 uint8_t event_size = 10u + data_length; 1124 int pos = 0; 1125 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1126 event[pos++] = event_size; 1127 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1128 offset += 8; 1129 pos += 8; 1130 event[pos++] = packet[offset + 1 + data_length]; // rssi 1131 event[pos++] = data_length; 1132 offset++; 1133 (void)memcpy(&event[pos], &packet[offset], data_length); 1134 pos += data_length; 1135 offset += data_length + 1u; // rssi 1136 hci_emit_event(event, pos, 1); 1137 } 1138 } 1139 #endif 1140 #endif 1141 1142 #ifdef ENABLE_BLE 1143 #ifdef ENABLE_LE_PERIPHERAL 1144 static void hci_update_advertisements_enabled_for_current_roles(void){ 1145 if (hci_stack->le_advertisements_enabled){ 1146 // get number of active le slave connections 1147 int num_slave_connections = 0; 1148 btstack_linked_list_iterator_t it; 1149 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1150 while (btstack_linked_list_iterator_has_next(&it)){ 1151 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1152 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1153 if (con->state != OPEN) continue; 1154 if (con->role != HCI_ROLE_SLAVE) continue; 1155 if (!hci_is_le_connection(con)) continue; 1156 num_slave_connections++; 1157 } 1158 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1159 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1160 } else { 1161 hci_stack->le_advertisements_enabled_for_current_roles = false; 1162 } 1163 } 1164 #endif 1165 #endif 1166 1167 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1168 1169 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1170 if (!hci_stack->config) return 0; 1171 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1172 // Limit baud rate for Broadcom chipsets to 3 mbps 1173 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1174 baud_rate = 3000000; 1175 } 1176 return baud_rate; 1177 } 1178 1179 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1180 UNUSED(ds); 1181 1182 switch (hci_stack->substate){ 1183 case HCI_INIT_W4_SEND_RESET: 1184 log_info("Resend HCI Reset"); 1185 hci_stack->substate = HCI_INIT_SEND_RESET; 1186 hci_stack->num_cmd_packets = 1; 1187 hci_run(); 1188 break; 1189 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1190 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1191 if (hci_stack->hci_transport->reset_link){ 1192 hci_stack->hci_transport->reset_link(); 1193 } 1194 1195 /* fall through */ 1196 1197 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1198 log_info("Resend HCI Reset - CSR Warm Boot"); 1199 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1200 hci_stack->num_cmd_packets = 1; 1201 hci_run(); 1202 break; 1203 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1204 if (hci_stack->hci_transport->set_baudrate){ 1205 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1206 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1207 hci_stack->hci_transport->set_baudrate(baud_rate); 1208 } 1209 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1210 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1211 if (hci_stack->hci_transport->reset_link){ 1212 log_info("Link Reset"); 1213 hci_stack->hci_transport->reset_link(); 1214 } 1215 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1216 hci_run(); 1217 } 1218 break; 1219 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1220 // otherwise continue 1221 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1222 hci_send_cmd(&hci_read_local_supported_commands); 1223 break; 1224 default: 1225 break; 1226 } 1227 } 1228 #endif 1229 1230 static void hci_initializing_next_state(void){ 1231 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1232 } 1233 1234 // assumption: hci_can_send_command_packet_now() == true 1235 static void hci_initializing_run(void){ 1236 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1237 switch (hci_stack->substate){ 1238 case HCI_INIT_SEND_RESET: 1239 hci_state_reset(); 1240 1241 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1242 // prepare reset if command complete not received in 100ms 1243 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1244 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1245 btstack_run_loop_add_timer(&hci_stack->timeout); 1246 #endif 1247 // send command 1248 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1249 hci_send_cmd(&hci_reset); 1250 break; 1251 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1252 hci_send_cmd(&hci_read_local_version_information); 1253 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1254 break; 1255 case HCI_INIT_SEND_READ_LOCAL_NAME: 1256 hci_send_cmd(&hci_read_local_name); 1257 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1258 break; 1259 1260 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1261 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1262 hci_state_reset(); 1263 // prepare reset if command complete not received in 100ms 1264 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1265 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1266 btstack_run_loop_add_timer(&hci_stack->timeout); 1267 // send command 1268 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1269 hci_send_cmd(&hci_reset); 1270 break; 1271 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1272 hci_state_reset(); 1273 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1274 hci_send_cmd(&hci_reset); 1275 break; 1276 case HCI_INIT_SEND_BAUD_CHANGE: { 1277 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1278 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1279 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1280 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1281 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1282 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1283 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1284 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1285 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1286 btstack_run_loop_add_timer(&hci_stack->timeout); 1287 } 1288 break; 1289 } 1290 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1291 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1292 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1293 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1294 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1295 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1296 break; 1297 } 1298 case HCI_INIT_CUSTOM_INIT: 1299 // Custom initialization 1300 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1301 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1302 bool send_cmd = false; 1303 switch (hci_stack->chipset_result){ 1304 case BTSTACK_CHIPSET_VALID_COMMAND: 1305 send_cmd = true; 1306 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1307 break; 1308 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1309 send_cmd = true; 1310 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1311 log_info("CSR Warm Boot"); 1312 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1313 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1314 btstack_run_loop_add_timer(&hci_stack->timeout); 1315 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1316 && hci_stack->config 1317 && hci_stack->chipset 1318 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1319 && hci_stack->hci_transport->set_baudrate 1320 && hci_transport_uart_get_main_baud_rate()){ 1321 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1322 } else { 1323 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1324 } 1325 break; 1326 default: 1327 break; 1328 } 1329 1330 if (send_cmd){ 1331 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1332 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1333 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1334 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1335 break; 1336 } 1337 log_info("Init script done"); 1338 1339 // Init script download on Broadcom chipsets causes: 1340 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1341 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1342 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1343 1344 // - baud rate to reset, restore UART baud rate if needed 1345 int need_baud_change = hci_stack->config 1346 && hci_stack->chipset 1347 && hci_stack->chipset->set_baudrate_command 1348 && hci_stack->hci_transport->set_baudrate 1349 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1350 if (need_baud_change) { 1351 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1352 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1353 hci_stack->hci_transport->set_baudrate(baud_rate); 1354 } 1355 1356 uint16_t bcm_delay_ms = 300; 1357 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1358 // -> Work around: wait here. 1359 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1360 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1361 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1362 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1363 btstack_run_loop_add_timer(&hci_stack->timeout); 1364 break; 1365 } 1366 } 1367 // otherwise continue 1368 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1369 hci_send_cmd(&hci_read_local_supported_commands); 1370 break; 1371 case HCI_INIT_SET_BD_ADDR: 1372 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1373 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1374 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1375 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1376 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1377 break; 1378 #endif 1379 1380 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1381 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1382 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1383 hci_send_cmd(&hci_read_local_supported_commands); 1384 break; 1385 case HCI_INIT_READ_BD_ADDR: 1386 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1387 hci_send_cmd(&hci_read_bd_addr); 1388 break; 1389 case HCI_INIT_READ_BUFFER_SIZE: 1390 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1391 hci_send_cmd(&hci_read_buffer_size); 1392 break; 1393 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1394 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1395 hci_send_cmd(&hci_read_local_supported_features); 1396 break; 1397 1398 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1399 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1400 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1401 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1402 break; 1403 case HCI_INIT_HOST_BUFFER_SIZE: 1404 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1405 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1406 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1407 break; 1408 #endif 1409 1410 case HCI_INIT_SET_EVENT_MASK: 1411 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1412 if (hci_le_supported()){ 1413 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1414 } else { 1415 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1416 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1417 } 1418 break; 1419 1420 #ifdef ENABLE_CLASSIC 1421 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1422 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1423 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1424 break; 1425 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1426 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1427 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1428 break; 1429 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1430 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1431 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1432 break; 1433 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1434 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1435 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1436 break; 1437 case HCI_INIT_WRITE_LOCAL_NAME: { 1438 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1439 hci_reserve_packet_buffer(); 1440 uint8_t * packet = hci_stack->hci_packet_buffer; 1441 // construct HCI Command and send 1442 uint16_t opcode = hci_write_local_name.opcode; 1443 hci_stack->last_cmd_opcode = opcode; 1444 packet[0] = opcode & 0xff; 1445 packet[1] = opcode >> 8; 1446 packet[2] = DEVICE_NAME_LEN; 1447 memset(&packet[3], 0, DEVICE_NAME_LEN); 1448 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1449 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1450 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1451 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1452 // expand '00:00:00:00:00:00' in name with bd_addr 1453 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1454 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1455 break; 1456 } 1457 case HCI_INIT_WRITE_EIR_DATA: { 1458 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1459 hci_reserve_packet_buffer(); 1460 uint8_t * packet = hci_stack->hci_packet_buffer; 1461 // construct HCI Command in-place and send 1462 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1463 hci_stack->last_cmd_opcode = opcode; 1464 uint16_t offset = 0; 1465 packet[offset++] = opcode & 0xff; 1466 packet[offset++] = opcode >> 8; 1467 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1468 packet[offset++] = 0; // FEC not required 1469 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1470 if (hci_stack->eir_data){ 1471 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1472 ad_context_t context; 1473 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1474 uint8_t data_type = ad_iterator_get_data_type(&context); 1475 uint8_t size = ad_iterator_get_data_len(&context); 1476 const uint8_t *data = ad_iterator_get_data(&context); 1477 // copy item 1478 packet[offset++] = size + 1; 1479 packet[offset++] = data_type; 1480 memcpy(&packet[offset], data, size); 1481 // update name item 1482 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1483 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1484 } 1485 offset += size; 1486 } 1487 } else { 1488 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1489 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1490 packet[offset++] = bytes_to_copy + 1; 1491 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1492 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1493 // expand '00:00:00:00:00:00' in name with bd_addr 1494 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1495 } 1496 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1497 break; 1498 } 1499 case HCI_INIT_WRITE_INQUIRY_MODE: 1500 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1501 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1502 break; 1503 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1504 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1505 hci_stack->secure_connections_active = true; 1506 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1507 break; 1508 case HCI_INIT_WRITE_SCAN_ENABLE: 1509 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1510 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1511 break; 1512 // only sent if ENABLE_SCO_OVER_HCI is defined 1513 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1514 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1515 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1516 break; 1517 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1518 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1519 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1520 break; 1521 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1522 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1523 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1524 #ifdef ENABLE_SCO_OVER_HCI 1525 log_info("BCM: Route SCO data via HCI transport"); 1526 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1527 #endif 1528 #ifdef ENABLE_SCO_OVER_PCM 1529 log_info("BCM: Route SCO data via PCM interface"); 1530 #ifdef ENABLE_BCM_PCM_WBS 1531 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1532 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1533 #else 1534 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1535 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1536 #endif 1537 #endif 1538 break; 1539 #ifdef ENABLE_SCO_OVER_PCM 1540 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1541 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1542 log_info("BCM: Config PCM interface for I2S"); 1543 #ifdef ENABLE_BCM_PCM_WBS 1544 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1545 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1546 #else 1547 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1548 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1549 #endif 1550 break; 1551 #endif 1552 #endif 1553 1554 #ifdef ENABLE_BLE 1555 // LE INIT 1556 case HCI_INIT_LE_READ_BUFFER_SIZE: 1557 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1558 hci_send_cmd(&hci_le_read_buffer_size); 1559 break; 1560 case HCI_INIT_LE_SET_EVENT_MASK: 1561 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1562 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1563 break; 1564 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1565 // LE Supported Host = 1, Simultaneous Host = 0 1566 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1567 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1568 break; 1569 #endif 1570 1571 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1572 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1573 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1574 hci_send_cmd(&hci_le_read_maximum_data_length); 1575 break; 1576 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1577 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1578 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1579 break; 1580 #endif 1581 1582 #ifdef ENABLE_LE_CENTRAL 1583 case HCI_INIT_READ_WHITE_LIST_SIZE: 1584 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1585 hci_send_cmd(&hci_le_read_white_list_size); 1586 break; 1587 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1588 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1589 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); 1590 break; 1591 #endif 1592 default: 1593 return; 1594 } 1595 } 1596 1597 static void hci_init_done(void){ 1598 // done. tell the app 1599 log_info("hci_init_done -> HCI_STATE_WORKING"); 1600 hci_stack->state = HCI_STATE_WORKING; 1601 hci_emit_state(); 1602 hci_run(); 1603 } 1604 1605 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1606 bool command_completed = false; 1607 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1608 uint16_t opcode = little_endian_read_16(packet,3); 1609 if (opcode == hci_stack->last_cmd_opcode){ 1610 command_completed = true; 1611 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1612 } else { 1613 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1614 } 1615 } 1616 1617 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1618 uint8_t status = packet[2]; 1619 uint16_t opcode = little_endian_read_16(packet,4); 1620 if (opcode == hci_stack->last_cmd_opcode){ 1621 if (status){ 1622 command_completed = true; 1623 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1624 } else { 1625 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1626 } 1627 } else { 1628 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1629 } 1630 } 1631 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1632 // Vendor == CSR 1633 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1634 // TODO: track actual command 1635 command_completed = true; 1636 } 1637 1638 // Vendor == Toshiba 1639 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1640 // TODO: track actual command 1641 command_completed = true; 1642 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1643 hci_stack->num_cmd_packets = 1; 1644 } 1645 #endif 1646 1647 return command_completed; 1648 } 1649 1650 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1651 1652 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1653 1654 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1655 1656 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1657 1658 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1659 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1660 // 1661 // HCI Reset 1662 // Timeout 100 ms 1663 // HCI Reset 1664 // Command Complete Reset 1665 // HCI Read Local Version Information 1666 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1667 // hang... 1668 // 1669 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1670 if (!command_completed 1671 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1672 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1673 1674 uint16_t opcode = little_endian_read_16(packet,3); 1675 if (opcode == hci_reset.opcode){ 1676 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1677 return; 1678 } 1679 } 1680 1681 // CSR & H5 1682 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1683 if (!command_completed 1684 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1685 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1686 1687 uint16_t opcode = little_endian_read_16(packet,3); 1688 if (opcode == hci_reset.opcode){ 1689 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1690 return; 1691 } 1692 } 1693 1694 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1695 // fix: Correct substate and behave as command below 1696 if (command_completed){ 1697 switch (hci_stack->substate){ 1698 case HCI_INIT_SEND_RESET: 1699 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1700 break; 1701 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1702 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1703 break; 1704 default: 1705 break; 1706 } 1707 } 1708 1709 #endif 1710 1711 if (!command_completed) return; 1712 1713 bool need_baud_change = false; 1714 bool need_addr_change = false; 1715 1716 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1717 need_baud_change = hci_stack->config 1718 && hci_stack->chipset 1719 && hci_stack->chipset->set_baudrate_command 1720 && hci_stack->hci_transport->set_baudrate 1721 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1722 1723 need_addr_change = hci_stack->custom_bd_addr_set 1724 && hci_stack->chipset 1725 && hci_stack->chipset->set_bd_addr_command; 1726 #endif 1727 1728 switch(hci_stack->substate){ 1729 1730 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1731 case HCI_INIT_SEND_RESET: 1732 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1733 // fix: just correct substate and behave as command below 1734 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1735 btstack_run_loop_remove_timer(&hci_stack->timeout); 1736 break; 1737 case HCI_INIT_W4_SEND_RESET: 1738 btstack_run_loop_remove_timer(&hci_stack->timeout); 1739 break; 1740 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1741 log_info("Received local name, need baud change %d", (int) need_baud_change); 1742 if (need_baud_change){ 1743 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1744 return; 1745 } 1746 // skip baud change 1747 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1748 return; 1749 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1750 // for STLC2500D, baud rate change already happened. 1751 // for others, baud rate gets changed now 1752 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1753 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1754 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1755 hci_stack->hci_transport->set_baudrate(baud_rate); 1756 } 1757 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1758 return; 1759 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1760 btstack_run_loop_remove_timer(&hci_stack->timeout); 1761 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1762 return; 1763 case HCI_INIT_W4_CUSTOM_INIT: 1764 // repeat custom init 1765 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1766 return; 1767 #else 1768 case HCI_INIT_W4_SEND_RESET: 1769 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1770 return ; 1771 #endif 1772 1773 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1774 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1775 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1776 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1777 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1778 return; 1779 } 1780 if (need_addr_change){ 1781 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1782 return; 1783 } 1784 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1785 return; 1786 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1787 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1788 if (need_baud_change){ 1789 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1790 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1791 hci_stack->hci_transport->set_baudrate(baud_rate); 1792 } 1793 if (need_addr_change){ 1794 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1795 return; 1796 } 1797 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1798 return; 1799 case HCI_INIT_W4_SET_BD_ADDR: 1800 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1801 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1802 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1803 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1804 return; 1805 } 1806 // skipping st warm boot 1807 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1808 return; 1809 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1810 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1811 return; 1812 #endif 1813 case HCI_INIT_W4_READ_BD_ADDR: 1814 // only read buffer size if supported 1815 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1816 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1817 return; 1818 } 1819 // skipping read buffer size 1820 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1821 return; 1822 case HCI_INIT_W4_SET_EVENT_MASK: 1823 // skip Classic init commands for LE only chipsets 1824 if (!hci_classic_supported()){ 1825 #ifdef ENABLE_BLE 1826 if (hci_le_supported()){ 1827 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1828 return; 1829 } 1830 #endif 1831 log_error("Neither BR/EDR nor LE supported"); 1832 hci_init_done(); 1833 return; 1834 } 1835 if (!gap_ssp_supported()){ 1836 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1837 return; 1838 } 1839 break; 1840 #ifdef ENABLE_BLE 1841 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1842 // skip write le host if not supported (e.g. on LE only EM9301) 1843 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1844 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1845 return; 1846 1847 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1848 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1849 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1850 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1851 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1852 return; 1853 } 1854 // explicit fall through to reduce repetitions 1855 1856 #ifdef ENABLE_LE_CENTRAL 1857 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1858 #else 1859 hci_init_done(); 1860 #endif 1861 return; 1862 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1863 1864 #endif /* ENABLE_BLE */ 1865 1866 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1867 // skip write secure connections host support if not supported or disabled 1868 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1869 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1870 return; 1871 } 1872 break; 1873 1874 #ifdef ENABLE_SCO_OVER_HCI 1875 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1876 // skip write synchronous flow control if not supported 1877 if (hci_stack->local_supported_commands[0] & 0x04) break; 1878 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1879 1880 /* fall through */ 1881 1882 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1883 // skip write default erroneous data reporting if not supported 1884 if (hci_stack->local_supported_commands[0] & 0x08) break; 1885 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1886 1887 /* fall through */ 1888 1889 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1890 // skip bcm set sco pcm config on non-Broadcom chipsets 1891 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1892 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1893 1894 /* fall through */ 1895 1896 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1897 if (!hci_le_supported()){ 1898 // SKIP LE init for Classic only configuration 1899 hci_init_done(); 1900 return; 1901 } 1902 break; 1903 1904 #else /* !ENABLE_SCO_OVER_HCI */ 1905 1906 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1907 #ifdef ENABLE_SCO_OVER_PCM 1908 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1909 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1910 return; 1911 } 1912 #endif 1913 /* fall through */ 1914 1915 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1916 #ifdef ENABLE_BLE 1917 if (hci_le_supported()){ 1918 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1919 return; 1920 } 1921 #endif 1922 // SKIP LE init for Classic only configuration 1923 hci_init_done(); 1924 return; 1925 #endif /* ENABLE_SCO_OVER_HCI */ 1926 1927 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1928 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1929 // Response to command before init done state -> init done 1930 case (HCI_INIT_DONE-1): 1931 hci_init_done(); 1932 return; 1933 #endif 1934 1935 default: 1936 break; 1937 } 1938 hci_initializing_next_state(); 1939 } 1940 1941 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1942 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1943 bd_addr_t bd_address; 1944 (void)memcpy(&bd_address, conn->address, 6); 1945 1946 #ifdef ENABLE_CLASSIC 1947 // cache needed data 1948 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1949 #endif 1950 1951 // connection failed, remove entry 1952 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1953 btstack_memory_hci_connection_free( conn ); 1954 1955 #ifdef ENABLE_CLASSIC 1956 // notify client if dedicated bonding 1957 if (notify_dedicated_bonding_failed){ 1958 log_info("hci notify_dedicated_bonding_failed"); 1959 hci_emit_dedicated_bonding_result(bd_address, status); 1960 } 1961 1962 // if authentication error, also delete link key 1963 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1964 gap_drop_link_key_for_bd_addr(bd_address); 1965 } 1966 #else 1967 UNUSED(status); 1968 #endif 1969 } 1970 1971 #ifdef ENABLE_CLASSIC 1972 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1973 // SSP Controller 1974 if (features[6] & (1 << 3)){ 1975 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1976 } 1977 // eSCO 1978 if (features[3] & (1<<7)){ 1979 conn->remote_supported_features[0] |= 1; 1980 } 1981 // Extended features 1982 if (features[7] & (1<<7)){ 1983 conn->remote_supported_features[0] |= 2; 1984 } 1985 } 1986 1987 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1988 // SSP Host 1989 if (features[0] & (1 << 0)){ 1990 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1991 } 1992 // SC Host 1993 if (features[0] & (1 << 3)){ 1994 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1995 } 1996 } 1997 1998 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1999 // SC Controller 2000 if (features[1] & (1 << 0)){ 2001 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2002 } 2003 } 2004 2005 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2006 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2007 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2008 if (conn->bonding_flags & BONDING_DEDICATED){ 2009 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2010 } 2011 } 2012 #endif 2013 2014 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2015 // handle BT initialization 2016 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2017 hci_initializing_event_handler(packet, size); 2018 } 2019 2020 // help with BT sleep 2021 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2022 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2023 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2024 hci_initializing_next_state(); 2025 } 2026 } 2027 2028 #ifdef ENABLE_CLASSIC 2029 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2030 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2031 conn->encryption_key_size = encryption_key_size; 2032 2033 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 2034 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2035 return; 2036 } 2037 2038 // Request Authentication if not already done 2039 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2040 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2041 } 2042 #endif 2043 2044 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2045 UNUSED(size); 2046 2047 uint16_t manufacturer; 2048 #ifdef ENABLE_CLASSIC 2049 hci_con_handle_t handle; 2050 hci_connection_t * conn; 2051 uint8_t status; 2052 #endif 2053 // get num cmd packets - limit to 1 to reduce complexity 2054 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2055 2056 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2057 switch (opcode){ 2058 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2059 if (packet[5]) break; 2060 // terminate, name 248 chars 2061 packet[6+248] = 0; 2062 log_info("local name: %s", &packet[6]); 2063 break; 2064 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2065 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2066 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2067 uint16_t acl_len = little_endian_read_16(packet, 6); 2068 uint16_t sco_len = packet[8]; 2069 2070 // determine usable ACL/SCO payload size 2071 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2072 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2073 2074 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2075 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2076 2077 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2078 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2079 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2080 } 2081 break; 2082 case HCI_OPCODE_HCI_READ_RSSI: 2083 if (packet[5] == ERROR_CODE_SUCCESS){ 2084 uint8_t event[5]; 2085 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2086 event[1] = 3; 2087 (void)memcpy(&event[2], &packet[6], 3); 2088 hci_emit_event(event, sizeof(event), 1); 2089 } 2090 break; 2091 #ifdef ENABLE_BLE 2092 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2093 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2094 hci_stack->le_acl_packets_total_num = packet[8]; 2095 // determine usable ACL payload size 2096 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2097 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2098 } 2099 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2100 break; 2101 #endif 2102 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2103 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2104 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2105 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2106 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); 2107 break; 2108 #endif 2109 #ifdef ENABLE_LE_CENTRAL 2110 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2111 hci_stack->le_whitelist_capacity = packet[6]; 2112 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2113 break; 2114 #endif 2115 case HCI_OPCODE_HCI_READ_BD_ADDR: 2116 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2117 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)); 2118 #ifdef ENABLE_CLASSIC 2119 if (hci_stack->link_key_db){ 2120 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2121 } 2122 #endif 2123 break; 2124 #ifdef ENABLE_CLASSIC 2125 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2126 hci_emit_discoverable_enabled(hci_stack->discoverable); 2127 break; 2128 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2129 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2130 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2131 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2132 hci_emit_event(event, sizeof(event), 1); 2133 } 2134 break; 2135 #endif 2136 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2137 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2138 2139 #ifdef ENABLE_CLASSIC 2140 // determine usable ACL packet types based on host buffer size and supported features 2141 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2142 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2143 #endif 2144 // Classic/LE 2145 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2146 break; 2147 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2148 manufacturer = little_endian_read_16(packet, 10); 2149 // map Cypress to Broadcom 2150 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2151 log_info("Treat Cypress as Broadcom"); 2152 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2153 little_endian_store_16(packet, 10, manufacturer); 2154 } 2155 hci_stack->manufacturer = manufacturer; 2156 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2157 break; 2158 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2159 hci_stack->local_supported_commands[0] = 2160 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2161 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2162 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2163 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2164 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2165 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2166 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2167 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2168 hci_stack->local_supported_commands[1] = 2169 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2170 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2171 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2172 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2173 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2174 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2175 break; 2176 #ifdef ENABLE_CLASSIC 2177 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2178 if (packet[5]) return; 2179 hci_stack->synchronous_flow_control_enabled = 1; 2180 break; 2181 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2182 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2183 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2184 conn = hci_connection_for_handle(handle); 2185 if (conn != NULL) { 2186 uint8_t key_size = 0; 2187 if (status == 0){ 2188 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2189 log_info("Handle %04x key Size: %u", handle, key_size); 2190 } else { 2191 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2192 } 2193 hci_handle_read_encryption_key_size_complete(conn, key_size); 2194 } 2195 break; 2196 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2197 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2198 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2199 uint8_t event[67]; 2200 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2201 event[1] = 65; 2202 (void)memset(&event[2], 0, 65); 2203 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2204 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2205 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2206 event[2] = 3; 2207 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2208 } else { 2209 event[2] = 1; 2210 } 2211 } 2212 hci_emit_event(event, sizeof(event), 0); 2213 break; 2214 } 2215 #endif 2216 #endif 2217 default: 2218 break; 2219 } 2220 } 2221 2222 #ifdef ENABLE_BLE 2223 static void event_handle_le_connection_complete(const uint8_t * packet){ 2224 bd_addr_t addr; 2225 bd_addr_type_t addr_type; 2226 hci_connection_t * conn; 2227 2228 // Connection management 2229 reverse_bd_addr(&packet[8], addr); 2230 addr_type = (bd_addr_type_t)packet[7]; 2231 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2232 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2233 2234 #ifdef ENABLE_LE_CENTRAL 2235 // handle error: error is reported only to the initiator -> outgoing connection 2236 if (packet[3]){ 2237 2238 // handle cancelled outgoing connection 2239 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2240 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2241 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2242 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2243 // whitelist connect 2244 if (hci_is_le_connection_type(addr_type)){ 2245 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2246 } 2247 // get outgoing connection conn struct for direct connect 2248 conn = gap_get_outgoing_connection(); 2249 } 2250 2251 // outgoing le connection establishment is done 2252 if (conn){ 2253 // remove entry 2254 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2255 btstack_memory_hci_connection_free( conn ); 2256 } 2257 return; 2258 } 2259 #endif 2260 2261 // on success, both hosts receive connection complete event 2262 if (packet[6] == HCI_ROLE_MASTER){ 2263 #ifdef ENABLE_LE_CENTRAL 2264 // if we're master on an le connection, it was an outgoing connection and we're done with it 2265 // note: no hci_connection_t object exists yet for connect with whitelist 2266 if (hci_is_le_connection_type(addr_type)){ 2267 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2268 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2269 } 2270 #endif 2271 } else { 2272 #ifdef ENABLE_LE_PERIPHERAL 2273 // if we're slave, it was an incoming connection, advertisements have stopped 2274 hci_stack->le_advertisements_active = false; 2275 #endif 2276 } 2277 2278 // LE connections are auto-accepted, so just create a connection if there isn't one already 2279 if (!conn){ 2280 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2281 } 2282 2283 // no memory, sorry. 2284 if (!conn){ 2285 return; 2286 } 2287 2288 conn->state = OPEN; 2289 conn->role = packet[6]; 2290 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2291 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2292 2293 #ifdef ENABLE_LE_PERIPHERAL 2294 if (packet[6] == HCI_ROLE_SLAVE){ 2295 hci_update_advertisements_enabled_for_current_roles(); 2296 } 2297 #endif 2298 2299 // init unenhanced att bearer mtu 2300 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2301 conn->att_connection.mtu_exchanged = false; 2302 2303 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2304 2305 // restart timer 2306 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2307 // btstack_run_loop_add_timer(&conn->timeout); 2308 2309 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2310 2311 hci_emit_nr_connections_changed(); 2312 } 2313 #endif 2314 2315 static void event_handler(uint8_t *packet, uint16_t size){ 2316 2317 uint16_t event_length = packet[1]; 2318 2319 // assert packet is complete 2320 if (size != (event_length + 2u)){ 2321 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2322 return; 2323 } 2324 2325 bd_addr_type_t addr_type; 2326 hci_con_handle_t handle; 2327 hci_connection_t * conn; 2328 int i; 2329 int create_connection_cmd; 2330 2331 #ifdef ENABLE_CLASSIC 2332 hci_link_type_t link_type; 2333 bd_addr_t addr; 2334 #endif 2335 2336 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2337 2338 switch (hci_event_packet_get_type(packet)) { 2339 2340 case HCI_EVENT_COMMAND_COMPLETE: 2341 handle_command_complete_event(packet, size); 2342 break; 2343 2344 case HCI_EVENT_COMMAND_STATUS: 2345 // get num cmd packets - limit to 1 to reduce complexity 2346 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2347 2348 // check command status to detected failed outgoing connections 2349 create_connection_cmd = 0; 2350 #ifdef ENABLE_CLASSIC 2351 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2352 create_connection_cmd = 1; 2353 } 2354 #endif 2355 #ifdef ENABLE_LE_CENTRAL 2356 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2357 create_connection_cmd = 1; 2358 } 2359 #endif 2360 if (create_connection_cmd) { 2361 uint8_t status = hci_event_command_status_get_status(packet); 2362 addr_type = hci_stack->outgoing_addr_type; 2363 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2364 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); 2365 2366 // reset outgoing address info 2367 memset(hci_stack->outgoing_addr, 0, 6); 2368 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2369 2370 // on error 2371 if (status != ERROR_CODE_SUCCESS){ 2372 #ifdef ENABLE_LE_CENTRAL 2373 if (hci_is_le_connection_type(addr_type)){ 2374 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2375 } 2376 #endif 2377 // error => outgoing connection failed 2378 if (conn != NULL){ 2379 hci_handle_connection_failed(conn, status); 2380 } 2381 } 2382 } 2383 break; 2384 2385 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2386 if (size < 3) return; 2387 uint16_t num_handles = packet[2]; 2388 if (size != (3u + num_handles * 4u)) return; 2389 uint16_t offset = 3; 2390 for (i=0; i<num_handles;i++){ 2391 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2392 offset += 2u; 2393 uint16_t num_packets = little_endian_read_16(packet, offset); 2394 offset += 2u; 2395 2396 conn = hci_connection_for_handle(handle); 2397 if (!conn){ 2398 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2399 continue; 2400 } 2401 2402 if (conn->num_packets_sent >= num_packets){ 2403 conn->num_packets_sent -= num_packets; 2404 } else { 2405 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2406 conn->num_packets_sent = 0; 2407 } 2408 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2409 2410 #ifdef ENABLE_CLASSIC 2411 // For SCO, we do the can_send_now_check here 2412 hci_notify_if_sco_can_send_now(); 2413 #endif 2414 } 2415 break; 2416 } 2417 2418 #ifdef ENABLE_CLASSIC 2419 case HCI_EVENT_INQUIRY_COMPLETE: 2420 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2421 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2422 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2423 hci_emit_event(event, sizeof(event), 1); 2424 } 2425 break; 2426 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2427 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2428 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2429 } 2430 break; 2431 case HCI_EVENT_CONNECTION_REQUEST: 2432 reverse_bd_addr(&packet[2], addr); 2433 link_type = (hci_link_type_t) packet[11]; 2434 if (hci_stack->gap_classic_accept_callback != NULL){ 2435 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2436 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2437 bd_addr_copy(hci_stack->decline_addr, addr); 2438 break; 2439 } 2440 } 2441 2442 // TODO: eval COD 8-10 2443 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2444 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2445 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2446 if (!conn) { 2447 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2448 } 2449 if (!conn) { 2450 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2451 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2452 bd_addr_copy(hci_stack->decline_addr, addr); 2453 break; 2454 } 2455 conn->role = HCI_ROLE_SLAVE; 2456 conn->state = RECEIVED_CONNECTION_REQUEST; 2457 // store info about eSCO 2458 if (link_type == HCI_LINK_TYPE_ESCO){ 2459 conn->remote_supported_features[0] |= 1; 2460 } 2461 hci_run(); 2462 break; 2463 2464 case HCI_EVENT_CONNECTION_COMPLETE: 2465 // Connection management 2466 reverse_bd_addr(&packet[5], addr); 2467 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2468 addr_type = BD_ADDR_TYPE_ACL; 2469 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2470 if (conn) { 2471 if (!packet[2]){ 2472 conn->state = OPEN; 2473 conn->con_handle = little_endian_read_16(packet, 3); 2474 2475 // queue get remote feature 2476 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2477 2478 // queue set supervision timeout if we're master 2479 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2480 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2481 } 2482 2483 // restart timer 2484 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2485 btstack_run_loop_add_timer(&conn->timeout); 2486 2487 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2488 2489 hci_emit_nr_connections_changed(); 2490 } else { 2491 // connection failed 2492 hci_handle_connection_failed(conn, packet[2]); 2493 } 2494 } 2495 break; 2496 2497 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2498 reverse_bd_addr(&packet[5], addr); 2499 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2500 if (packet[2]){ 2501 // connection failed 2502 break; 2503 } 2504 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2505 if (!conn) { 2506 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2507 } 2508 if (!conn) { 2509 break; 2510 } 2511 conn->state = OPEN; 2512 conn->con_handle = little_endian_read_16(packet, 3); 2513 2514 #ifdef ENABLE_SCO_OVER_HCI 2515 // update SCO 2516 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2517 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2518 } 2519 // trigger can send now 2520 if (hci_have_usb_transport()){ 2521 hci_stack->sco_can_send_now = 1; 2522 } 2523 #endif 2524 #ifdef HAVE_SCO_TRANSPORT 2525 // configure sco transport 2526 if (hci_stack->sco_transport != NULL){ 2527 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2528 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2529 } 2530 #endif 2531 break; 2532 2533 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2534 handle = little_endian_read_16(packet, 3); 2535 conn = hci_connection_for_handle(handle); 2536 if (!conn) break; 2537 if (!packet[2]){ 2538 const uint8_t * features = &packet[5]; 2539 hci_handle_remote_features_page_0(conn, features); 2540 2541 // read extended features if possible 2542 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2543 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2544 break; 2545 } 2546 } 2547 hci_handle_remote_features_received(conn); 2548 break; 2549 2550 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2551 handle = little_endian_read_16(packet, 3); 2552 conn = hci_connection_for_handle(handle); 2553 if (!conn) break; 2554 // status = ok, page = 1 2555 if (!packet[2]) { 2556 uint8_t page_number = packet[5]; 2557 uint8_t maximum_page_number = packet[6]; 2558 const uint8_t * features = &packet[7]; 2559 bool done = false; 2560 switch (page_number){ 2561 case 1: 2562 hci_handle_remote_features_page_1(conn, features); 2563 if (maximum_page_number >= 2){ 2564 // get Secure Connections (Controller) from Page 2 if available 2565 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2566 } else { 2567 // otherwise, assume SC (Controller) == SC (Host) 2568 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2569 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2570 } 2571 done = true; 2572 } 2573 break; 2574 case 2: 2575 hci_handle_remote_features_page_2(conn, features); 2576 done = true; 2577 break; 2578 default: 2579 break; 2580 } 2581 if (!done) break; 2582 } 2583 hci_handle_remote_features_received(conn); 2584 break; 2585 2586 case HCI_EVENT_LINK_KEY_REQUEST: 2587 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2588 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2589 // request handled by hci_run() 2590 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2591 break; 2592 2593 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2594 reverse_bd_addr(&packet[2], addr); 2595 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2596 if (!conn) break; 2597 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2598 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2599 // Change Connection Encryption keeps link key type 2600 if (link_key_type != CHANGED_COMBINATION_KEY){ 2601 conn->link_key_type = link_key_type; 2602 } 2603 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2604 // still forward event to allow dismiss of pairing dialog 2605 break; 2606 } 2607 2608 case HCI_EVENT_PIN_CODE_REQUEST: 2609 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2610 // non-bondable mode: pin code negative reply will be sent 2611 if (!hci_stack->bondable){ 2612 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2613 hci_run(); 2614 return; 2615 } 2616 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2617 if (!hci_stack->link_key_db) break; 2618 hci_event_pin_code_request_get_bd_addr(packet, addr); 2619 hci_stack->link_key_db->delete_link_key(addr); 2620 break; 2621 2622 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2623 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2624 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 2625 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2626 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 2627 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2628 } else { 2629 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2630 } 2631 #endif 2632 break; 2633 2634 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2635 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2636 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2637 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2638 break; 2639 #endif 2640 2641 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2642 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2643 if (!hci_stack->ssp_auto_accept) break; 2644 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2645 break; 2646 2647 case HCI_EVENT_USER_PASSKEY_REQUEST: 2648 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2649 if (!hci_stack->ssp_auto_accept) break; 2650 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2651 break; 2652 2653 case HCI_EVENT_MODE_CHANGE: 2654 handle = hci_event_mode_change_get_handle(packet); 2655 conn = hci_connection_for_handle(handle); 2656 if (!conn) break; 2657 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2658 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2659 break; 2660 #endif 2661 2662 case HCI_EVENT_ENCRYPTION_CHANGE: 2663 handle = hci_event_encryption_change_get_connection_handle(packet); 2664 conn = hci_connection_for_handle(handle); 2665 if (!conn) break; 2666 if (hci_event_encryption_change_get_status(packet) == 0u) { 2667 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2668 if (encryption_enabled){ 2669 if (hci_is_le_connection(conn)){ 2670 // For LE, we accept connection as encrypted 2671 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2672 } 2673 #ifdef ENABLE_CLASSIC 2674 else { 2675 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2676 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2677 bool connected_uses_aes_ccm = encryption_enabled == 2; 2678 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2679 log_info("SC during pairing, but only E0 now -> abort"); 2680 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2681 break; 2682 } 2683 2684 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2685 if (connected_uses_aes_ccm){ 2686 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2687 } 2688 2689 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2690 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2691 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2692 } else { 2693 // if not, pretend everything is perfect 2694 hci_handle_read_encryption_key_size_complete(conn, 16); 2695 } 2696 } 2697 #endif 2698 } else { 2699 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2700 } 2701 } 2702 2703 break; 2704 2705 #ifdef ENABLE_CLASSIC 2706 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2707 handle = hci_event_authentication_complete_get_connection_handle(packet); 2708 conn = hci_connection_for_handle(handle); 2709 if (!conn) break; 2710 2711 // ignore authentication event if we didn't request it 2712 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2713 2714 // dedicated bonding: send result and disconnect 2715 if (conn->bonding_flags & BONDING_DEDICATED){ 2716 conn->bonding_flags &= ~BONDING_DEDICATED; 2717 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2718 conn->bonding_status = packet[2]; 2719 break; 2720 } 2721 2722 // authenticated only if auth status == 0 2723 if (hci_event_authentication_complete_get_status(packet) == 0){ 2724 // authenticated 2725 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2726 2727 // If link key sufficient for requested security and not already encrypted, start encryption 2728 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2729 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2730 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2731 break; 2732 } 2733 } 2734 2735 // emit updated security level 2736 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2737 break; 2738 #endif 2739 2740 // HCI_EVENT_DISCONNECTION_COMPLETE 2741 // has been split, to first notify stack before shutting connection down 2742 // see end of function, too. 2743 case HCI_EVENT_DISCONNECTION_COMPLETE: 2744 if (packet[2]) break; // status != 0 2745 handle = little_endian_read_16(packet, 3); 2746 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2747 if (hci_stack->acl_fragmentation_total_size > 0u) { 2748 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2749 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2750 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2751 hci_stack->acl_fragmentation_total_size = 0; 2752 hci_stack->acl_fragmentation_pos = 0; 2753 if (release_buffer){ 2754 hci_release_packet_buffer(); 2755 } 2756 } 2757 } 2758 2759 conn = hci_connection_for_handle(handle); 2760 if (!conn) break; 2761 // mark connection for shutdown 2762 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2763 2764 // emit dedicatd bonding event 2765 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2766 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2767 } 2768 2769 #ifdef ENABLE_BLE 2770 #ifdef ENABLE_LE_PERIPHERAL 2771 // re-enable advertisements for le connections if active 2772 if (hci_is_le_connection(conn)){ 2773 hci_update_advertisements_enabled_for_current_roles(); 2774 } 2775 #endif 2776 #endif 2777 break; 2778 2779 case HCI_EVENT_HARDWARE_ERROR: 2780 log_error("Hardware Error: 0x%02x", packet[2]); 2781 if (hci_stack->hardware_error_callback){ 2782 (*hci_stack->hardware_error_callback)(packet[2]); 2783 } else { 2784 // if no special requests, just reboot stack 2785 hci_power_control_off(); 2786 hci_power_control_on(); 2787 } 2788 break; 2789 2790 #ifdef ENABLE_CLASSIC 2791 case HCI_EVENT_ROLE_CHANGE: 2792 if (packet[2]) break; // status != 0 2793 reverse_bd_addr(&packet[3], addr); 2794 addr_type = BD_ADDR_TYPE_ACL; 2795 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2796 if (!conn) break; 2797 conn->role = packet[9]; 2798 break; 2799 #endif 2800 2801 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2802 // release packet buffer only for asynchronous transport and if there are not further fragements 2803 if (hci_transport_synchronous()) { 2804 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2805 return; // instead of break: to avoid re-entering hci_run() 2806 } 2807 hci_stack->acl_fragmentation_tx_active = 0; 2808 if (hci_stack->acl_fragmentation_total_size) break; 2809 hci_release_packet_buffer(); 2810 2811 // L2CAP receives this event via the hci_emit_event below 2812 2813 #ifdef ENABLE_CLASSIC 2814 // For SCO, we do the can_send_now_check here 2815 hci_notify_if_sco_can_send_now(); 2816 #endif 2817 break; 2818 2819 #ifdef ENABLE_CLASSIC 2820 case HCI_EVENT_SCO_CAN_SEND_NOW: 2821 // For SCO, we do the can_send_now_check here 2822 hci_stack->sco_can_send_now = 1; 2823 hci_notify_if_sco_can_send_now(); 2824 return; 2825 2826 // explode inquriy results for easier consumption 2827 case HCI_EVENT_INQUIRY_RESULT: 2828 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2829 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2830 gap_inquiry_explode(packet, size); 2831 break; 2832 #endif 2833 2834 #ifdef ENABLE_BLE 2835 case HCI_EVENT_LE_META: 2836 switch (packet[2]){ 2837 #ifdef ENABLE_LE_CENTRAL 2838 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2839 // log_info("advertising report received"); 2840 if (!hci_stack->le_scanning_enabled) break; 2841 le_handle_advertisement_report(packet, size); 2842 break; 2843 #endif 2844 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2845 event_handle_le_connection_complete(packet); 2846 break; 2847 2848 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2849 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2850 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2851 conn = hci_connection_for_handle(handle); 2852 if (!conn) break; 2853 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2854 break; 2855 2856 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2857 // connection 2858 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2859 conn = hci_connection_for_handle(handle); 2860 if (conn) { 2861 // read arguments 2862 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2863 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2864 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2865 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2866 2867 // validate against current connection parameter range 2868 le_connection_parameter_range_t existing_range; 2869 gap_get_connection_parameter_range(&existing_range); 2870 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2871 if (update_parameter){ 2872 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2873 conn->le_conn_interval_min = le_conn_interval_min; 2874 conn->le_conn_interval_max = le_conn_interval_max; 2875 conn->le_conn_latency = le_conn_latency; 2876 conn->le_supervision_timeout = le_supervision_timeout; 2877 } else { 2878 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2879 } 2880 } 2881 break; 2882 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2883 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2884 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2885 conn = hci_connection_for_handle(handle); 2886 if (conn) { 2887 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2888 } 2889 break; 2890 #endif 2891 default: 2892 break; 2893 } 2894 break; 2895 #endif 2896 case HCI_EVENT_VENDOR_SPECIFIC: 2897 // Vendor specific commands often create vendor specific event instead of num completed packets 2898 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2899 switch (hci_stack->manufacturer){ 2900 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2901 hci_stack->num_cmd_packets = 1; 2902 break; 2903 default: 2904 break; 2905 } 2906 break; 2907 default: 2908 break; 2909 } 2910 2911 handle_event_for_current_stack_state(packet, size); 2912 2913 // notify upper stack 2914 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2915 2916 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2917 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2918 handle = little_endian_read_16(packet, 3); 2919 hci_connection_t * aConn = hci_connection_for_handle(handle); 2920 // discard connection if app did not trigger a reconnect in the event handler 2921 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2922 hci_shutdown_connection(aConn); 2923 } 2924 } 2925 2926 // execute main loop 2927 hci_run(); 2928 } 2929 2930 #ifdef ENABLE_CLASSIC 2931 2932 #ifdef ENABLE_SCO_OVER_HCI 2933 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2934 static void sco_schedule_tx(hci_connection_t * conn); 2935 2936 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2937 log_debug("SCO TX Timeout"); 2938 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2939 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2940 if (!conn) return; 2941 2942 // trigger send 2943 conn->sco_tx_ready = 1; 2944 // extra packet if CVSD but SCO buffer is too short 2945 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2946 conn->sco_tx_ready++; 2947 } 2948 hci_notify_if_sco_can_send_now(); 2949 } 2950 2951 2952 #define SCO_TX_AFTER_RX_MS (6) 2953 2954 static void sco_schedule_tx(hci_connection_t * conn){ 2955 2956 uint32_t now = btstack_run_loop_get_time_ms(); 2957 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2958 int time_delta_ms = sco_tx_ms - now; 2959 2960 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2961 2962 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2963 btstack_run_loop_set_timer(timer, time_delta_ms); 2964 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2965 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2966 btstack_run_loop_add_timer(timer); 2967 } 2968 #endif 2969 2970 static void sco_handler(uint8_t * packet, uint16_t size){ 2971 // lookup connection struct 2972 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2973 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2974 if (!conn) return; 2975 2976 #ifdef ENABLE_SCO_OVER_HCI 2977 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2978 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2979 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2980 packet[2] = 0x3c; 2981 memmove(&packet[3], &packet[23], 63); 2982 size = 63; 2983 } 2984 } 2985 2986 if (hci_have_usb_transport()){ 2987 // Nothing to do 2988 } else { 2989 // 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); 2990 if (hci_stack->synchronous_flow_control_enabled == 0){ 2991 uint32_t now = btstack_run_loop_get_time_ms(); 2992 2993 if (!conn->sco_rx_valid){ 2994 // ignore first 10 packets 2995 conn->sco_rx_count++; 2996 // log_debug("sco rx count %u", conn->sco_rx_count); 2997 if (conn->sco_rx_count == 10) { 2998 // use first timestamp as is and pretent it just started 2999 conn->sco_rx_ms = now; 3000 conn->sco_rx_valid = 1; 3001 conn->sco_rx_count = 0; 3002 sco_schedule_tx(conn); 3003 } 3004 } else { 3005 // track expected arrival timme 3006 conn->sco_rx_count++; 3007 conn->sco_rx_ms += 7; 3008 int delta = (int32_t) (now - conn->sco_rx_ms); 3009 if (delta > 0){ 3010 conn->sco_rx_ms++; 3011 } 3012 // log_debug("sco rx %u", conn->sco_rx_ms); 3013 sco_schedule_tx(conn); 3014 } 3015 } 3016 } 3017 #endif 3018 3019 // deliver to app 3020 if (hci_stack->sco_packet_handler) { 3021 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3022 } 3023 3024 #ifdef HAVE_SCO_TRANSPORT 3025 // We can send one packet for each received packet 3026 conn->sco_tx_ready++; 3027 hci_notify_if_sco_can_send_now(); 3028 #endif 3029 3030 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3031 conn->num_packets_completed++; 3032 hci_stack->host_completed_packets = 1; 3033 hci_run(); 3034 #endif 3035 } 3036 #endif 3037 3038 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3039 hci_dump_packet(packet_type, 1, packet, size); 3040 switch (packet_type) { 3041 case HCI_EVENT_PACKET: 3042 event_handler(packet, size); 3043 break; 3044 case HCI_ACL_DATA_PACKET: 3045 acl_handler(packet, size); 3046 break; 3047 #ifdef ENABLE_CLASSIC 3048 case HCI_SCO_DATA_PACKET: 3049 sco_handler(packet, size); 3050 break; 3051 #endif 3052 default: 3053 break; 3054 } 3055 } 3056 3057 /** 3058 * @brief Add event packet handler. 3059 */ 3060 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3061 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3062 } 3063 3064 3065 /** Register HCI packet handlers */ 3066 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3067 hci_stack->acl_packet_handler = handler; 3068 } 3069 3070 #ifdef ENABLE_CLASSIC 3071 /** 3072 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3073 */ 3074 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3075 hci_stack->sco_packet_handler = handler; 3076 } 3077 #endif 3078 3079 static void hci_state_reset(void){ 3080 // no connections yet 3081 hci_stack->connections = NULL; 3082 3083 // keep discoverable/connectable as this has been requested by the client(s) 3084 // hci_stack->discoverable = 0; 3085 // hci_stack->connectable = 0; 3086 // hci_stack->bondable = 1; 3087 // hci_stack->own_addr_type = 0; 3088 3089 // buffer is free 3090 hci_stack->hci_packet_buffer_reserved = 0; 3091 3092 // no pending cmds 3093 hci_stack->decline_reason = 0; 3094 hci_stack->new_scan_enable_value = 0xff; 3095 3096 hci_stack->secure_connections_active = false; 3097 3098 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3099 hci_stack->classic_read_local_oob_data = true; 3100 #endif 3101 3102 // LE 3103 #ifdef ENABLE_BLE 3104 memset(hci_stack->le_random_address, 0, 6); 3105 hci_stack->le_random_address_set = 0; 3106 #endif 3107 #ifdef ENABLE_LE_CENTRAL 3108 hci_stack->le_scanning_active = 0; 3109 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3110 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3111 hci_stack->le_whitelist_capacity = 0; 3112 #endif 3113 } 3114 3115 #ifdef ENABLE_CLASSIC 3116 /** 3117 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3118 */ 3119 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3120 // store and open remote device db 3121 hci_stack->link_key_db = link_key_db; 3122 if (hci_stack->link_key_db) { 3123 hci_stack->link_key_db->open(); 3124 } 3125 } 3126 #endif 3127 3128 void hci_init(const hci_transport_t *transport, const void *config){ 3129 3130 #ifdef HAVE_MALLOC 3131 if (!hci_stack) { 3132 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3133 } 3134 #else 3135 hci_stack = &hci_stack_static; 3136 #endif 3137 memset(hci_stack, 0, sizeof(hci_stack_t)); 3138 3139 // reference to use transport layer implementation 3140 hci_stack->hci_transport = transport; 3141 3142 // reference to used config 3143 hci_stack->config = config; 3144 3145 // setup pointer for outgoing packet buffer 3146 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3147 3148 // max acl payload size defined in config.h 3149 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3150 3151 // register packet handlers with transport 3152 transport->register_packet_handler(&packet_handler); 3153 3154 hci_stack->state = HCI_STATE_OFF; 3155 3156 // class of device 3157 hci_stack->class_of_device = 0x007a020c; // Smartphone 3158 3159 // bondable by default 3160 hci_stack->bondable = 1; 3161 3162 #ifdef ENABLE_CLASSIC 3163 // classic name 3164 hci_stack->local_name = default_classic_name; 3165 3166 // Master slave policy 3167 hci_stack->master_slave_policy = 1; 3168 3169 // Allow Role Switch 3170 hci_stack->allow_role_switch = 1; 3171 3172 // Default / minimum security level = 2 3173 hci_stack->gap_security_level = LEVEL_2; 3174 3175 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3176 hci_stack->gap_required_encyrption_key_size = 7; 3177 #endif 3178 3179 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3180 hci_stack->ssp_enable = 1; 3181 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3182 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3183 hci_stack->ssp_auto_accept = 1; 3184 3185 // Secure Connections: enable (requires support from Controller) 3186 hci_stack->secure_connections_enable = true; 3187 3188 // voice setting - signed 16 bit pcm data with CVSD over the air 3189 hci_stack->sco_voice_setting = 0x60; 3190 3191 #ifdef ENABLE_LE_CENTRAL 3192 // connection parameter to use for outgoing connections 3193 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3194 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3195 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3196 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3197 hci_stack->le_connection_latency = 4; // 4 3198 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3199 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3200 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3201 3202 // default LE Scanning 3203 hci_stack->le_scan_type = 0x1; // active 3204 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3205 hci_stack->le_scan_window = 0x30; // 30 ms 3206 #endif 3207 3208 #ifdef ENABLE_LE_PERIPHERAL 3209 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3210 #endif 3211 3212 // connection parameter range used to answer connection parameter update requests in l2cap 3213 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3214 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3215 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3216 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3217 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3218 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3219 3220 hci_state_reset(); 3221 } 3222 3223 void hci_deinit(void){ 3224 #ifdef HAVE_MALLOC 3225 if (hci_stack) { 3226 free(hci_stack); 3227 } 3228 #endif 3229 hci_stack = NULL; 3230 3231 #ifdef ENABLE_CLASSIC 3232 disable_l2cap_timeouts = 0; 3233 #endif 3234 } 3235 3236 /** 3237 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3238 */ 3239 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3240 hci_stack->chipset = chipset_driver; 3241 3242 // reset chipset driver - init is also called on power_up 3243 if (hci_stack->chipset && hci_stack->chipset->init){ 3244 hci_stack->chipset->init(hci_stack->config); 3245 } 3246 } 3247 3248 /** 3249 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3250 */ 3251 void hci_set_control(const btstack_control_t *hardware_control){ 3252 // references to used control implementation 3253 hci_stack->control = hardware_control; 3254 // init with transport config 3255 hardware_control->init(hci_stack->config); 3256 } 3257 3258 void hci_close(void){ 3259 // close remote device db 3260 if (hci_stack->link_key_db) { 3261 hci_stack->link_key_db->close(); 3262 } 3263 3264 btstack_linked_list_iterator_t lit; 3265 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3266 while (btstack_linked_list_iterator_has_next(&lit)){ 3267 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3268 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3269 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3270 hci_shutdown_connection(connection); 3271 } 3272 3273 hci_power_control(HCI_POWER_OFF); 3274 3275 #ifdef HAVE_MALLOC 3276 free(hci_stack); 3277 #endif 3278 hci_stack = NULL; 3279 } 3280 3281 #ifdef HAVE_SCO_TRANSPORT 3282 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3283 hci_stack->sco_transport = sco_transport; 3284 sco_transport->register_packet_handler(&packet_handler); 3285 } 3286 #endif 3287 3288 #ifdef ENABLE_CLASSIC 3289 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3290 // validate ranage and set 3291 if (encryption_key_size < 7) return; 3292 if (encryption_key_size > 16) return; 3293 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3294 } 3295 3296 void gap_set_security_level(gap_security_level_t security_level){ 3297 hci_stack->gap_security_level = security_level; 3298 } 3299 3300 gap_security_level_t gap_get_security_level(void){ 3301 return hci_stack->gap_security_level; 3302 } 3303 #endif 3304 3305 #ifdef ENABLE_CLASSIC 3306 void gap_set_class_of_device(uint32_t class_of_device){ 3307 hci_stack->class_of_device = class_of_device; 3308 } 3309 3310 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3311 hci_stack->default_link_policy_settings = default_link_policy_settings; 3312 } 3313 3314 void gap_set_allow_role_switch(bool allow_role_switch){ 3315 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3316 } 3317 3318 uint8_t hci_get_allow_role_switch(void){ 3319 return hci_stack->allow_role_switch; 3320 } 3321 3322 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3323 hci_stack->link_supervision_timeout = link_supervision_timeout; 3324 } 3325 3326 void hci_disable_l2cap_timeout_check(void){ 3327 disable_l2cap_timeouts = 1; 3328 } 3329 #endif 3330 3331 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3332 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3333 void hci_set_bd_addr(bd_addr_t addr){ 3334 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3335 hci_stack->custom_bd_addr_set = 1; 3336 } 3337 #endif 3338 3339 // State-Module-Driver overview 3340 // state module low-level 3341 // HCI_STATE_OFF off close 3342 // HCI_STATE_INITIALIZING, on open 3343 // HCI_STATE_WORKING, on open 3344 // HCI_STATE_HALTING, on open 3345 // HCI_STATE_SLEEPING, off/sleep close 3346 // HCI_STATE_FALLING_ASLEEP on open 3347 3348 static int hci_power_control_on(void){ 3349 3350 // power on 3351 int err = 0; 3352 if (hci_stack->control && hci_stack->control->on){ 3353 err = (*hci_stack->control->on)(); 3354 } 3355 if (err){ 3356 log_error( "POWER_ON failed"); 3357 hci_emit_hci_open_failed(); 3358 return err; 3359 } 3360 3361 // int chipset driver 3362 if (hci_stack->chipset && hci_stack->chipset->init){ 3363 hci_stack->chipset->init(hci_stack->config); 3364 } 3365 3366 // init transport 3367 if (hci_stack->hci_transport->init){ 3368 hci_stack->hci_transport->init(hci_stack->config); 3369 } 3370 3371 // open transport 3372 err = hci_stack->hci_transport->open(); 3373 if (err){ 3374 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3375 if (hci_stack->control && hci_stack->control->off){ 3376 (*hci_stack->control->off)(); 3377 } 3378 hci_emit_hci_open_failed(); 3379 return err; 3380 } 3381 return 0; 3382 } 3383 3384 static void hci_power_control_off(void){ 3385 3386 log_info("hci_power_control_off"); 3387 3388 // close low-level device 3389 hci_stack->hci_transport->close(); 3390 3391 log_info("hci_power_control_off - hci_transport closed"); 3392 3393 // power off 3394 if (hci_stack->control && hci_stack->control->off){ 3395 (*hci_stack->control->off)(); 3396 } 3397 3398 log_info("hci_power_control_off - control closed"); 3399 3400 hci_stack->state = HCI_STATE_OFF; 3401 } 3402 3403 static void hci_power_control_sleep(void){ 3404 3405 log_info("hci_power_control_sleep"); 3406 3407 #if 0 3408 // don't close serial port during sleep 3409 3410 // close low-level device 3411 hci_stack->hci_transport->close(hci_stack->config); 3412 #endif 3413 3414 // sleep mode 3415 if (hci_stack->control && hci_stack->control->sleep){ 3416 (*hci_stack->control->sleep)(); 3417 } 3418 3419 hci_stack->state = HCI_STATE_SLEEPING; 3420 } 3421 3422 static int hci_power_control_wake(void){ 3423 3424 log_info("hci_power_control_wake"); 3425 3426 // wake on 3427 if (hci_stack->control && hci_stack->control->wake){ 3428 (*hci_stack->control->wake)(); 3429 } 3430 3431 #if 0 3432 // open low-level device 3433 int err = hci_stack->hci_transport->open(hci_stack->config); 3434 if (err){ 3435 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3436 if (hci_stack->control && hci_stack->control->off){ 3437 (*hci_stack->control->off)(); 3438 } 3439 hci_emit_hci_open_failed(); 3440 return err; 3441 } 3442 #endif 3443 3444 return 0; 3445 } 3446 3447 static void hci_power_transition_to_initializing(void){ 3448 // set up state machine 3449 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3450 hci_stack->hci_packet_buffer_reserved = 0; 3451 hci_stack->state = HCI_STATE_INITIALIZING; 3452 hci_stack->substate = HCI_INIT_SEND_RESET; 3453 } 3454 3455 // returns error 3456 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3457 int err; 3458 switch (power_mode){ 3459 case HCI_POWER_ON: 3460 err = hci_power_control_on(); 3461 if (err != 0) { 3462 log_error("hci_power_control_on() error %d", err); 3463 return err; 3464 } 3465 hci_power_transition_to_initializing(); 3466 break; 3467 case HCI_POWER_OFF: 3468 // do nothing 3469 break; 3470 case HCI_POWER_SLEEP: 3471 // do nothing (with SLEEP == OFF) 3472 break; 3473 default: 3474 btstack_assert(false); 3475 break; 3476 } 3477 return ERROR_CODE_SUCCESS; 3478 } 3479 3480 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3481 switch (power_mode){ 3482 case HCI_POWER_ON: 3483 // do nothing 3484 break; 3485 case HCI_POWER_OFF: 3486 // no connections yet, just turn it off 3487 hci_power_control_off(); 3488 break; 3489 case HCI_POWER_SLEEP: 3490 // no connections yet, just turn it off 3491 hci_power_control_sleep(); 3492 break; 3493 default: 3494 btstack_assert(false); 3495 break; 3496 } 3497 return ERROR_CODE_SUCCESS; 3498 } 3499 3500 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3501 switch (power_mode){ 3502 case HCI_POWER_ON: 3503 // do nothing 3504 break; 3505 case HCI_POWER_OFF: 3506 // see hci_run 3507 hci_stack->state = HCI_STATE_HALTING; 3508 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3509 break; 3510 case HCI_POWER_SLEEP: 3511 // see hci_run 3512 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3513 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3514 break; 3515 default: 3516 btstack_assert(false); 3517 break; 3518 } 3519 return ERROR_CODE_SUCCESS; 3520 } 3521 3522 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3523 switch (power_mode){ 3524 case HCI_POWER_ON: 3525 hci_power_transition_to_initializing(); 3526 break; 3527 case HCI_POWER_OFF: 3528 // do nothing 3529 break; 3530 case HCI_POWER_SLEEP: 3531 // see hci_run 3532 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3533 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3534 break; 3535 default: 3536 btstack_assert(false); 3537 break; 3538 } 3539 return ERROR_CODE_SUCCESS; 3540 } 3541 3542 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3543 switch (power_mode){ 3544 case HCI_POWER_ON: 3545 3546 #ifdef HAVE_PLATFORM_IPHONE_OS 3547 // nothing to do, if H4 supports power management 3548 if (btstack_control_iphone_power_management_enabled()){ 3549 hci_stack->state = HCI_STATE_INITIALIZING; 3550 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3551 break; 3552 } 3553 #endif 3554 hci_power_transition_to_initializing(); 3555 break; 3556 case HCI_POWER_OFF: 3557 // see hci_run 3558 hci_stack->state = HCI_STATE_HALTING; 3559 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3560 break; 3561 case HCI_POWER_SLEEP: 3562 // do nothing 3563 break; 3564 default: 3565 btstack_assert(false); 3566 break; 3567 } 3568 return ERROR_CODE_SUCCESS; 3569 } 3570 3571 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3572 int err; 3573 switch (power_mode){ 3574 case HCI_POWER_ON: 3575 #ifdef HAVE_PLATFORM_IPHONE_OS 3576 // nothing to do, if H4 supports power management 3577 if (btstack_control_iphone_power_management_enabled()){ 3578 hci_stack->state = HCI_STATE_INITIALIZING; 3579 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3580 hci_update_scan_enable(); 3581 break; 3582 } 3583 #endif 3584 err = hci_power_control_wake(); 3585 if (err) return err; 3586 hci_power_transition_to_initializing(); 3587 break; 3588 case HCI_POWER_OFF: 3589 hci_stack->state = HCI_STATE_HALTING; 3590 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3591 break; 3592 case HCI_POWER_SLEEP: 3593 // do nothing 3594 break; 3595 default: 3596 btstack_assert(false); 3597 break; 3598 } 3599 return ERROR_CODE_SUCCESS; 3600 } 3601 3602 int hci_power_control(HCI_POWER_MODE power_mode){ 3603 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3604 int err = 0; 3605 switch (hci_stack->state){ 3606 case HCI_STATE_OFF: 3607 err = hci_power_control_state_off(power_mode); 3608 break; 3609 case HCI_STATE_INITIALIZING: 3610 err = hci_power_control_state_initializing(power_mode); 3611 break; 3612 case HCI_STATE_WORKING: 3613 err = hci_power_control_state_working(power_mode); 3614 break; 3615 case HCI_STATE_HALTING: 3616 err = hci_power_control_state_halting(power_mode); 3617 break; 3618 case HCI_STATE_FALLING_ASLEEP: 3619 err = hci_power_control_state_falling_asleep(power_mode); 3620 break; 3621 case HCI_STATE_SLEEPING: 3622 err = hci_power_control_state_sleeping(power_mode); 3623 break; 3624 default: 3625 btstack_assert(false); 3626 break; 3627 } 3628 if (err != 0){ 3629 return err; 3630 } 3631 3632 // create internal event 3633 hci_emit_state(); 3634 3635 // trigger next/first action 3636 hci_run(); 3637 3638 return 0; 3639 } 3640 3641 3642 #ifdef ENABLE_CLASSIC 3643 3644 static void hci_update_scan_enable(void){ 3645 // 2 = page scan, 1 = inq scan 3646 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3647 hci_run(); 3648 } 3649 3650 void gap_discoverable_control(uint8_t enable){ 3651 if (enable) enable = 1; // normalize argument 3652 3653 if (hci_stack->discoverable == enable){ 3654 hci_emit_discoverable_enabled(hci_stack->discoverable); 3655 return; 3656 } 3657 3658 hci_stack->discoverable = enable; 3659 hci_update_scan_enable(); 3660 } 3661 3662 void gap_connectable_control(uint8_t enable){ 3663 if (enable) enable = 1; // normalize argument 3664 3665 // don't emit event 3666 if (hci_stack->connectable == enable) return; 3667 3668 hci_stack->connectable = enable; 3669 hci_update_scan_enable(); 3670 } 3671 #endif 3672 3673 void gap_local_bd_addr(bd_addr_t address_buffer){ 3674 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3675 } 3676 3677 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3678 static void hci_host_num_completed_packets(void){ 3679 3680 // create packet manually as arrays are not supported and num_commands should not get reduced 3681 hci_reserve_packet_buffer(); 3682 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3683 3684 uint16_t size = 0; 3685 uint16_t num_handles = 0; 3686 packet[size++] = 0x35; 3687 packet[size++] = 0x0c; 3688 size++; // skip param len 3689 size++; // skip num handles 3690 3691 // add { handle, packets } entries 3692 btstack_linked_item_t * it; 3693 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3694 hci_connection_t * connection = (hci_connection_t *) it; 3695 if (connection->num_packets_completed){ 3696 little_endian_store_16(packet, size, connection->con_handle); 3697 size += 2; 3698 little_endian_store_16(packet, size, connection->num_packets_completed); 3699 size += 2; 3700 // 3701 num_handles++; 3702 connection->num_packets_completed = 0; 3703 } 3704 } 3705 3706 packet[2] = size - 3; 3707 packet[3] = num_handles; 3708 3709 hci_stack->host_completed_packets = 0; 3710 3711 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3712 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3713 3714 // release packet buffer for synchronous transport implementations 3715 if (hci_transport_synchronous()){ 3716 hci_release_packet_buffer(); 3717 hci_emit_transport_packet_sent(); 3718 } 3719 } 3720 #endif 3721 3722 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3723 UNUSED(ds); 3724 hci_stack->substate = HCI_HALTING_CLOSE; 3725 // allow packet handlers to defer final shutdown 3726 hci_emit_state(); 3727 hci_run(); 3728 } 3729 3730 static bool hci_run_acl_fragments(void){ 3731 if (hci_stack->acl_fragmentation_total_size > 0u) { 3732 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3733 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3734 if (connection) { 3735 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3736 hci_send_acl_packet_fragments(connection); 3737 return true; 3738 } 3739 } else { 3740 // connection gone -> discard further fragments 3741 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3742 hci_stack->acl_fragmentation_total_size = 0; 3743 hci_stack->acl_fragmentation_pos = 0; 3744 } 3745 } 3746 return false; 3747 } 3748 3749 #ifdef ENABLE_CLASSIC 3750 static bool hci_run_general_gap_classic(void){ 3751 3752 // decline incoming connections 3753 if (hci_stack->decline_reason){ 3754 uint8_t reason = hci_stack->decline_reason; 3755 hci_stack->decline_reason = 0; 3756 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3757 return true; 3758 } 3759 // send scan enable 3760 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3761 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3762 hci_stack->new_scan_enable_value = 0xff; 3763 return true; 3764 } 3765 // start/stop inquiry 3766 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3767 uint8_t duration = hci_stack->inquiry_state; 3768 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3769 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3770 return true; 3771 } 3772 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3773 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3774 hci_send_cmd(&hci_inquiry_cancel); 3775 return true; 3776 } 3777 // remote name request 3778 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3779 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3780 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3781 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3782 return true; 3783 } 3784 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3785 // Local OOB data 3786 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 3787 hci_stack->classic_read_local_oob_data = false; 3788 if (hci_stack->local_supported_commands[1] & 0x10u){ 3789 hci_send_cmd(&hci_read_local_extended_oob_data); 3790 } else { 3791 hci_send_cmd(&hci_read_local_oob_data); 3792 } 3793 } 3794 #endif 3795 // pairing 3796 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3797 uint8_t state = hci_stack->gap_pairing_state; 3798 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3799 switch (state){ 3800 case GAP_PAIRING_STATE_SEND_PIN: 3801 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); 3802 break; 3803 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3804 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3805 break; 3806 case GAP_PAIRING_STATE_SEND_PASSKEY: 3807 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3808 break; 3809 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3810 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3811 break; 3812 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3813 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3814 break; 3815 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3816 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3817 break; 3818 default: 3819 break; 3820 } 3821 return true; 3822 } 3823 return false; 3824 } 3825 #endif 3826 3827 #ifdef ENABLE_BLE 3828 static bool hci_run_general_gap_le(void){ 3829 3830 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3831 3832 if (hci_stack->state != HCI_STATE_WORKING) return false; 3833 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3834 3835 3836 // Phase 1: collect what to stop 3837 3838 bool scanning_stop = false; 3839 bool connecting_stop = false; 3840 bool advertising_stop = false; 3841 3842 #ifndef ENABLE_LE_CENTRAL 3843 UNUSED(scanning_stop); 3844 UNUSED(connecting_stop); 3845 #endif 3846 #ifndef ENABLE_LE_PERIPHERAL 3847 UNUSED(advertising_stop); 3848 #endif 3849 3850 // check if whitelist needs modification 3851 bool whitelist_modification_pending = false; 3852 btstack_linked_list_iterator_t lit; 3853 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3854 while (btstack_linked_list_iterator_has_next(&lit)){ 3855 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3856 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3857 whitelist_modification_pending = true; 3858 break; 3859 } 3860 } 3861 // check if resolving list needs modification 3862 bool resolving_list_modification_pending = false; 3863 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3864 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3865 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3866 resolving_list_modification_pending = true; 3867 } 3868 #endif 3869 3870 #ifdef ENABLE_LE_CENTRAL 3871 // scanning control 3872 if (hci_stack->le_scanning_active) { 3873 // stop if: 3874 // - parameter change required 3875 // - it's disabled 3876 // - whitelist change required but used for scanning 3877 // - resolving list modified 3878 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3879 if ((hci_stack->le_scanning_param_update) || 3880 !hci_stack->le_scanning_enabled || 3881 scanning_uses_whitelist || 3882 resolving_list_modification_pending){ 3883 3884 scanning_stop = true; 3885 } 3886 } 3887 #endif 3888 3889 #ifdef ENABLE_LE_CENTRAL 3890 // connecting control 3891 bool connecting_with_whitelist; 3892 switch (hci_stack->le_connecting_state){ 3893 case LE_CONNECTING_DIRECT: 3894 case LE_CONNECTING_WHITELIST: 3895 // stop connecting if: 3896 // - connecting uses white and whitelist modification pending 3897 // - if it got disabled 3898 // - resolving list modified 3899 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3900 if ((connecting_with_whitelist && whitelist_modification_pending) || 3901 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3902 resolving_list_modification_pending) { 3903 3904 connecting_stop = true; 3905 } 3906 break; 3907 default: 3908 break; 3909 } 3910 #endif 3911 3912 #ifdef ENABLE_LE_PERIPHERAL 3913 // le advertisement control 3914 if (hci_stack->le_advertisements_active){ 3915 // stop if: 3916 // - parameter change required 3917 // - it's disabled 3918 // - whitelist change required but used for advertisement filter policy 3919 // - resolving list modified 3920 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3921 if ((hci_stack->le_advertisements_todo != 0) || 3922 !hci_stack->le_advertisements_enabled_for_current_roles || 3923 (advertising_uses_whitelist & whitelist_modification_pending) || 3924 resolving_list_modification_pending) { 3925 3926 advertising_stop = true; 3927 } 3928 } 3929 #endif 3930 3931 3932 // Phase 2: stop everything that should be off during modifications 3933 3934 #ifdef ENABLE_LE_CENTRAL 3935 if (scanning_stop){ 3936 hci_stack->le_scanning_active = false; 3937 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3938 return true; 3939 } 3940 #endif 3941 3942 #ifdef ENABLE_LE_CENTRAL 3943 if (connecting_stop){ 3944 hci_send_cmd(&hci_le_create_connection_cancel); 3945 return true; 3946 } 3947 #endif 3948 3949 #ifdef ENABLE_LE_PERIPHERAL 3950 if (advertising_stop){ 3951 hci_stack->le_advertisements_active = false; 3952 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3953 return true; 3954 } 3955 #endif 3956 3957 // Phase 3: modify 3958 3959 #ifdef ENABLE_LE_CENTRAL 3960 if (hci_stack->le_scanning_param_update){ 3961 hci_stack->le_scanning_param_update = false; 3962 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3963 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3964 return true; 3965 } 3966 #endif 3967 3968 #ifdef ENABLE_LE_PERIPHERAL 3969 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3970 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3971 hci_send_cmd(&hci_le_set_advertising_parameters, 3972 hci_stack->le_advertisements_interval_min, 3973 hci_stack->le_advertisements_interval_max, 3974 hci_stack->le_advertisements_type, 3975 hci_stack->le_own_addr_type, 3976 hci_stack->le_advertisements_direct_address_type, 3977 hci_stack->le_advertisements_direct_address, 3978 hci_stack->le_advertisements_channel_map, 3979 hci_stack->le_advertisements_filter_policy); 3980 return true; 3981 } 3982 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3983 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3984 uint8_t adv_data_clean[31]; 3985 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3986 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3987 hci_stack->le_advertisements_data_len); 3988 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3989 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3990 return true; 3991 } 3992 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3993 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3994 uint8_t scan_data_clean[31]; 3995 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3996 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3997 hci_stack->le_scan_response_data_len); 3998 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3999 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4000 return true; 4001 } 4002 #endif 4003 4004 4005 #ifdef ENABLE_LE_CENTRAL 4006 // if connect with whitelist was active and is not cancelled yet, wait until next time 4007 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4008 #endif 4009 4010 // LE Whitelist Management 4011 if (whitelist_modification_pending){ 4012 // add/remove entries 4013 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4014 while (btstack_linked_list_iterator_has_next(&lit)){ 4015 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4016 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4017 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4018 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4019 return true; 4020 } 4021 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4022 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4023 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4024 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4025 return true; 4026 } 4027 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4028 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4029 btstack_memory_whitelist_entry_free(entry); 4030 } 4031 } 4032 } 4033 4034 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4035 // LE Resolving List Management 4036 if (resolving_list_supported) { 4037 uint16_t i; 4038 switch (hci_stack->le_resolving_list_state) { 4039 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4040 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4041 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4042 return true; 4043 case LE_RESOLVING_LIST_READ_SIZE: 4044 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4045 hci_send_cmd(&hci_le_read_resolving_list_size); 4046 return true; 4047 case LE_RESOLVING_LIST_SEND_CLEAR: 4048 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4049 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4050 sizeof(hci_stack->le_resolving_list_add_entries)); 4051 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4052 sizeof(hci_stack->le_resolving_list_remove_entries)); 4053 hci_send_cmd(&hci_le_clear_resolving_list); 4054 return true; 4055 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4056 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4057 uint8_t offset = i >> 3; 4058 uint8_t mask = 1 << (i & 7); 4059 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4060 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4061 bd_addr_t peer_identity_addreses; 4062 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4063 sm_key_t peer_irk; 4064 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4065 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4066 4067 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4068 // trigger whitelist entry 'update' (work around for controller bug) 4069 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4070 while (btstack_linked_list_iterator_has_next(&lit)) { 4071 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4072 if (entry->address_type != peer_identity_addr_type) continue; 4073 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4074 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4075 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4076 } 4077 #endif 4078 4079 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4080 peer_identity_addreses); 4081 return true; 4082 } 4083 4084 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4085 4086 /* fall through */ 4087 4088 case LE_RESOLVING_LIST_ADD_ENTRIES: 4089 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4090 uint8_t offset = i >> 3; 4091 uint8_t mask = 1 << (i & 7); 4092 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4093 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4094 bd_addr_t peer_identity_addreses; 4095 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4096 sm_key_t peer_irk; 4097 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4098 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4099 const uint8_t *local_irk = gap_get_persistent_irk(); 4100 // command uses format specifier 'P' that stores 16-byte value without flip 4101 uint8_t local_irk_flipped[16]; 4102 uint8_t peer_irk_flipped[16]; 4103 reverse_128(local_irk, local_irk_flipped); 4104 reverse_128(peer_irk, peer_irk_flipped); 4105 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4106 peer_irk_flipped, local_irk_flipped); 4107 return true; 4108 } 4109 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4110 break; 4111 4112 default: 4113 break; 4114 } 4115 } 4116 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4117 #endif 4118 4119 // Phase 4: restore state 4120 4121 #ifdef ENABLE_LE_CENTRAL 4122 // re-start scanning 4123 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4124 hci_stack->le_scanning_active = true; 4125 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4126 return true; 4127 } 4128 #endif 4129 4130 #ifdef ENABLE_LE_CENTRAL 4131 // re-start connecting 4132 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4133 bd_addr_t null_addr; 4134 memset(null_addr, 0, 6); 4135 hci_send_cmd(&hci_le_create_connection, 4136 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4137 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4138 1, // use whitelist 4139 0, // peer address type 4140 null_addr, // peer bd addr 4141 hci_stack->le_own_addr_type, // our addr type: 4142 hci_stack->le_connection_interval_min, // conn interval min 4143 hci_stack->le_connection_interval_max, // conn interval max 4144 hci_stack->le_connection_latency, // conn latency 4145 hci_stack->le_supervision_timeout, // conn latency 4146 hci_stack->le_minimum_ce_length, // min ce length 4147 hci_stack->le_maximum_ce_length // max ce length 4148 ); 4149 return true; 4150 } 4151 #endif 4152 4153 #ifdef ENABLE_LE_PERIPHERAL 4154 // re-start advertising 4155 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4156 // check if advertisements should be enabled given 4157 hci_stack->le_advertisements_active = true; 4158 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4159 return true; 4160 } 4161 #endif 4162 4163 return false; 4164 } 4165 #endif 4166 4167 static bool hci_run_general_pending_commands(void){ 4168 btstack_linked_item_t * it; 4169 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4170 hci_connection_t * connection = (hci_connection_t *) it; 4171 4172 switch(connection->state){ 4173 case SEND_CREATE_CONNECTION: 4174 switch(connection->address_type){ 4175 #ifdef ENABLE_CLASSIC 4176 case BD_ADDR_TYPE_ACL: 4177 log_info("sending hci_create_connection"); 4178 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4179 break; 4180 #endif 4181 default: 4182 #ifdef ENABLE_BLE 4183 #ifdef ENABLE_LE_CENTRAL 4184 log_info("sending hci_le_create_connection"); 4185 hci_send_cmd(&hci_le_create_connection, 4186 hci_stack->le_connection_scan_interval, // conn scan interval 4187 hci_stack->le_connection_scan_window, // conn scan windows 4188 0, // don't use whitelist 4189 connection->address_type, // peer address type 4190 connection->address, // peer bd addr 4191 hci_stack->le_own_addr_type, // our addr type: 4192 hci_stack->le_connection_interval_min, // conn interval min 4193 hci_stack->le_connection_interval_max, // conn interval max 4194 hci_stack->le_connection_latency, // conn latency 4195 hci_stack->le_supervision_timeout, // conn latency 4196 hci_stack->le_minimum_ce_length, // min ce length 4197 hci_stack->le_maximum_ce_length // max ce length 4198 ); 4199 connection->state = SENT_CREATE_CONNECTION; 4200 #endif 4201 #endif 4202 break; 4203 } 4204 return true; 4205 4206 #ifdef ENABLE_CLASSIC 4207 case RECEIVED_CONNECTION_REQUEST: 4208 connection->role = HCI_ROLE_SLAVE; 4209 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4210 log_info("sending hci_accept_connection_request"); 4211 connection->state = ACCEPTED_CONNECTION_REQUEST; 4212 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4213 } 4214 return true; 4215 #endif 4216 4217 #ifdef ENABLE_BLE 4218 #ifdef ENABLE_LE_CENTRAL 4219 case SEND_CANCEL_CONNECTION: 4220 connection->state = SENT_CANCEL_CONNECTION; 4221 hci_send_cmd(&hci_le_create_connection_cancel); 4222 return true; 4223 #endif 4224 #endif 4225 case SEND_DISCONNECT: 4226 connection->state = SENT_DISCONNECT; 4227 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4228 return true; 4229 4230 default: 4231 break; 4232 } 4233 4234 // no further commands if connection is about to get shut down 4235 if (connection->state == SENT_DISCONNECT) continue; 4236 4237 if (connection->authentication_flags & READ_RSSI){ 4238 connectionClearAuthenticationFlags(connection, READ_RSSI); 4239 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4240 return true; 4241 } 4242 4243 #ifdef ENABLE_CLASSIC 4244 4245 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4246 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4247 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4248 return true; 4249 } 4250 4251 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4252 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4253 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4254 4255 link_key_t link_key; 4256 link_key_type_t link_key_type; 4257 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4258 4259 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4260 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4261 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4262 if (sc_downgrade){ 4263 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4264 connection->state = SENT_DISCONNECT; 4265 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4266 return true; 4267 } 4268 4269 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4270 if (have_link_key && security_level_sufficient){ 4271 connection->link_key_type = link_key_type; 4272 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4273 } else { 4274 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4275 } 4276 return true; 4277 } 4278 4279 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4280 log_info("denying to pin request"); 4281 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4282 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4283 return true; 4284 } 4285 4286 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4287 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4288 // tweak authentication requirements 4289 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4290 if (connection->bonding_flags & BONDING_DEDICATED){ 4291 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4292 } 4293 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4294 authreq |= 1; 4295 } 4296 uint8_t have_oob_data = 0; 4297 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4298 if (connection->classic_oob_c_192 != NULL){ 4299 have_oob_data |= 1; 4300 } 4301 if (connection->classic_oob_c_256 != NULL){ 4302 have_oob_data |= 2; 4303 } 4304 #endif 4305 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4306 return true; 4307 } 4308 4309 if (connection->authentication_flags & SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4310 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4311 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4312 return true; 4313 } 4314 4315 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4316 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4317 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4318 const uint8_t zero[16] = { 0 }; 4319 const uint8_t * r_192 = zero; 4320 const uint8_t * c_192 = zero; 4321 const uint8_t * r_256 = zero; 4322 const uint8_t * c_256 = zero; 4323 // verify P-256 OOB 4324 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4325 c_256 = connection->classic_oob_c_256; 4326 if (connection->classic_oob_r_256 != NULL) { 4327 r_256 = connection->classic_oob_r_256; 4328 } 4329 } 4330 // verify P-192 OOB 4331 if ((connection->classic_oob_c_192 != NULL)) { 4332 c_192 = connection->classic_oob_c_192; 4333 if (connection->classic_oob_r_192 != NULL) { 4334 r_192 = connection->classic_oob_r_192; 4335 } 4336 } 4337 // Reply 4338 if (c_256 != zero) { 4339 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4340 } else if (c_192 != zero){ 4341 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4342 } else { 4343 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4344 } 4345 return true; 4346 } 4347 #endif 4348 4349 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4350 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4351 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4352 return true; 4353 } 4354 4355 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4356 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4357 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4358 return true; 4359 } 4360 4361 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4362 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4363 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4364 return true; 4365 } 4366 4367 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4368 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4369 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4370 return true; 4371 } 4372 4373 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4374 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4375 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4376 return true; 4377 } 4378 4379 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4380 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4381 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4382 connection->state = SENT_DISCONNECT; 4383 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4384 return true; 4385 } 4386 4387 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4388 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4389 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4390 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4391 return true; 4392 } 4393 4394 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4395 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4396 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4397 return true; 4398 } 4399 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4400 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4401 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4402 return true; 4403 } 4404 #endif 4405 4406 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4407 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4408 if (connection->state != SENT_DISCONNECT){ 4409 connection->state = SENT_DISCONNECT; 4410 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4411 return true; 4412 } 4413 } 4414 4415 #ifdef ENABLE_CLASSIC 4416 uint16_t sniff_min_interval; 4417 switch (connection->sniff_min_interval){ 4418 case 0: 4419 break; 4420 case 0xffff: 4421 connection->sniff_min_interval = 0; 4422 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4423 return true; 4424 default: 4425 sniff_min_interval = connection->sniff_min_interval; 4426 connection->sniff_min_interval = 0; 4427 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4428 return true; 4429 } 4430 4431 if (connection->request_role != HCI_ROLE_INVALID){ 4432 hci_role_t role = connection->request_role; 4433 connection->request_role = HCI_ROLE_INVALID; 4434 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4435 return true; 4436 } 4437 #endif 4438 4439 #ifdef ENABLE_BLE 4440 switch (connection->le_con_parameter_update_state){ 4441 // response to L2CAP CON PARAMETER UPDATE REQUEST 4442 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4443 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4444 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4445 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4446 0x0000, 0xffff); 4447 return true; 4448 case CON_PARAMETER_UPDATE_REPLY: 4449 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4450 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4451 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4452 0x0000, 0xffff); 4453 return true; 4454 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4455 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4456 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4457 return true; 4458 default: 4459 break; 4460 } 4461 if (connection->le_phy_update_all_phys != 0xffu){ 4462 uint8_t all_phys = connection->le_phy_update_all_phys; 4463 connection->le_phy_update_all_phys = 0xff; 4464 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); 4465 return true; 4466 } 4467 #endif 4468 } 4469 return false; 4470 } 4471 4472 static void hci_run(void){ 4473 4474 bool done; 4475 4476 // send continuation fragments first, as they block the prepared packet buffer 4477 done = hci_run_acl_fragments(); 4478 if (done) return; 4479 4480 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4481 // send host num completed packets next as they don't require num_cmd_packets > 0 4482 if (!hci_can_send_comand_packet_transport()) return; 4483 if (hci_stack->host_completed_packets){ 4484 hci_host_num_completed_packets(); 4485 return; 4486 } 4487 #endif 4488 4489 if (!hci_can_send_command_packet_now()) return; 4490 4491 // global/non-connection oriented commands 4492 4493 4494 #ifdef ENABLE_CLASSIC 4495 // general gap classic 4496 done = hci_run_general_gap_classic(); 4497 if (done) return; 4498 #endif 4499 4500 #ifdef ENABLE_BLE 4501 // general gap le 4502 done = hci_run_general_gap_le(); 4503 if (done) return; 4504 #endif 4505 4506 // send pending HCI commands 4507 done = hci_run_general_pending_commands(); 4508 if (done) return; 4509 4510 // stack state sub statemachines 4511 hci_connection_t * connection; 4512 switch (hci_stack->state){ 4513 case HCI_STATE_INITIALIZING: 4514 hci_initializing_run(); 4515 break; 4516 4517 case HCI_STATE_HALTING: 4518 4519 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4520 switch (hci_stack->substate){ 4521 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4522 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4523 4524 #ifdef ENABLE_BLE 4525 #ifdef ENABLE_LE_CENTRAL 4526 // free whitelist entries 4527 { 4528 btstack_linked_list_iterator_t lit; 4529 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4530 while (btstack_linked_list_iterator_has_next(&lit)){ 4531 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4532 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4533 btstack_memory_whitelist_entry_free(entry); 4534 } 4535 } 4536 #endif 4537 #endif 4538 // close all open connections 4539 connection = (hci_connection_t *) hci_stack->connections; 4540 if (connection){ 4541 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4542 if (!hci_can_send_command_packet_now()) return; 4543 4544 // check state 4545 if (connection->state == SENT_DISCONNECT) return; 4546 connection->state = SENT_DISCONNECT; 4547 4548 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4549 4550 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4551 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4552 4553 // ... which would be ignored anyway as we shutdown (free) the connection now 4554 hci_shutdown_connection(connection); 4555 4556 // finally, send the disconnect command 4557 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4558 return; 4559 } 4560 4561 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4562 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4563 log_info("HCI_STATE_HALTING: wait 50 ms"); 4564 hci_stack->substate = HCI_HALTING_W4_TIMER; 4565 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4566 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4567 btstack_run_loop_add_timer(&hci_stack->timeout); 4568 break; 4569 } 4570 4571 /* fall through */ 4572 4573 case HCI_HALTING_CLOSE: 4574 log_info("HCI_STATE_HALTING, calling off"); 4575 4576 // switch mode 4577 hci_power_control_off(); 4578 4579 log_info("HCI_STATE_HALTING, emitting state"); 4580 hci_emit_state(); 4581 log_info("HCI_STATE_HALTING, done"); 4582 break; 4583 4584 case HCI_HALTING_W4_TIMER: 4585 // keep waiting 4586 4587 break; 4588 default: 4589 break; 4590 } 4591 4592 break; 4593 4594 case HCI_STATE_FALLING_ASLEEP: 4595 switch(hci_stack->substate) { 4596 case HCI_FALLING_ASLEEP_DISCONNECT: 4597 log_info("HCI_STATE_FALLING_ASLEEP"); 4598 // close all open connections 4599 connection = (hci_connection_t *) hci_stack->connections; 4600 4601 #ifdef HAVE_PLATFORM_IPHONE_OS 4602 // don't close connections, if H4 supports power management 4603 if (btstack_control_iphone_power_management_enabled()){ 4604 connection = NULL; 4605 } 4606 #endif 4607 if (connection){ 4608 4609 // send disconnect 4610 if (!hci_can_send_command_packet_now()) return; 4611 4612 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4613 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4614 4615 // send disconnected event right away - causes higher layer connections to get closed, too. 4616 hci_shutdown_connection(connection); 4617 return; 4618 } 4619 4620 if (hci_classic_supported()){ 4621 // disable page and inquiry scan 4622 if (!hci_can_send_command_packet_now()) return; 4623 4624 log_info("HCI_STATE_HALTING, disabling inq scans"); 4625 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4626 4627 // continue in next sub state 4628 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4629 break; 4630 } 4631 4632 /* fall through */ 4633 4634 case HCI_FALLING_ASLEEP_COMPLETE: 4635 log_info("HCI_STATE_HALTING, calling sleep"); 4636 #ifdef HAVE_PLATFORM_IPHONE_OS 4637 // don't actually go to sleep, if H4 supports power management 4638 if (btstack_control_iphone_power_management_enabled()){ 4639 // SLEEP MODE reached 4640 hci_stack->state = HCI_STATE_SLEEPING; 4641 hci_emit_state(); 4642 break; 4643 } 4644 #endif 4645 // switch mode 4646 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4647 hci_emit_state(); 4648 break; 4649 4650 default: 4651 break; 4652 } 4653 break; 4654 4655 default: 4656 break; 4657 } 4658 } 4659 4660 int hci_send_cmd_packet(uint8_t *packet, int size){ 4661 // house-keeping 4662 4663 #ifdef ENABLE_CLASSIC 4664 bd_addr_t addr; 4665 hci_connection_t * conn; 4666 #endif 4667 #ifdef ENABLE_LE_CENTRAL 4668 uint8_t initiator_filter_policy; 4669 #endif 4670 4671 uint16_t opcode = little_endian_read_16(packet, 0); 4672 switch (opcode) { 4673 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4674 hci_stack->loopback_mode = packet[3]; 4675 break; 4676 4677 #ifdef ENABLE_CLASSIC 4678 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4679 reverse_bd_addr(&packet[3], addr); 4680 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4681 4682 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4683 if (!conn) { 4684 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4685 if (!conn) { 4686 // notify client that alloc failed 4687 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4688 return -1; // packet not sent to controller 4689 } 4690 conn->state = SEND_CREATE_CONNECTION; 4691 conn->role = HCI_ROLE_MASTER; 4692 } 4693 log_info("conn state %u", conn->state); 4694 switch (conn->state) { 4695 // if connection active exists 4696 case OPEN: 4697 // and OPEN, emit connection complete command 4698 hci_emit_connection_complete(addr, conn->con_handle, 0); 4699 return -1; // packet not sent to controller 4700 case RECEIVED_DISCONNECTION_COMPLETE: 4701 // create connection triggered in disconnect complete event, let's do it now 4702 break; 4703 case SEND_CREATE_CONNECTION: 4704 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4705 break; 4706 default: 4707 // otherwise, just ignore as it is already in the open process 4708 return -1; // packet not sent to controller 4709 } 4710 conn->state = SENT_CREATE_CONNECTION; 4711 4712 // track outgoing connection 4713 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4714 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4715 break; 4716 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4717 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4718 break; 4719 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4720 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4721 break; 4722 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4723 if (hci_stack->link_key_db) { 4724 reverse_bd_addr(&packet[3], addr); 4725 hci_stack->link_key_db->delete_link_key(addr); 4726 } 4727 break; 4728 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4729 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4730 reverse_bd_addr(&packet[3], addr); 4731 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4732 if (conn) { 4733 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4734 } 4735 break; 4736 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4737 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4738 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4739 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4740 reverse_bd_addr(&packet[3], addr); 4741 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4742 if (conn) { 4743 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4744 } 4745 break; 4746 4747 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 4748 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4749 // setup_synchronous_connection? Voice setting at offset 22 4750 // TODO: compare to current setting if sco connection already active 4751 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4752 break; 4753 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4754 // accept_synchronus_connection? Voice setting at offset 18 4755 // TODO: compare to current setting if sco connection already active 4756 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4757 break; 4758 #endif 4759 #endif 4760 4761 #ifdef ENABLE_BLE 4762 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4763 hci_stack->le_random_address_set = 1; 4764 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4765 break; 4766 #ifdef ENABLE_LE_PERIPHERAL 4767 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4768 hci_stack->le_advertisements_active = packet[3] != 0; 4769 break; 4770 #endif 4771 #ifdef ENABLE_LE_CENTRAL 4772 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4773 // white list used? 4774 initiator_filter_policy = packet[7]; 4775 switch (initiator_filter_policy) { 4776 case 0: 4777 // whitelist not used 4778 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4779 break; 4780 case 1: 4781 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4782 break; 4783 default: 4784 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4785 break; 4786 } 4787 // track outgoing connection 4788 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4789 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4790 break; 4791 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4792 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4793 break; 4794 #endif 4795 #endif 4796 default: 4797 break; 4798 } 4799 4800 hci_stack->num_cmd_packets--; 4801 4802 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4803 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4804 } 4805 4806 // disconnect because of security block 4807 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4808 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4809 if (!connection) return; 4810 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4811 } 4812 4813 4814 // Configure Secure Simple Pairing 4815 4816 #ifdef ENABLE_CLASSIC 4817 4818 // enable will enable SSP during init 4819 void gap_ssp_set_enable(int enable){ 4820 hci_stack->ssp_enable = enable; 4821 } 4822 4823 static int hci_local_ssp_activated(void){ 4824 return gap_ssp_supported() && hci_stack->ssp_enable; 4825 } 4826 4827 // if set, BTstack will respond to io capability request using authentication requirement 4828 void gap_ssp_set_io_capability(int io_capability){ 4829 hci_stack->ssp_io_capability = io_capability; 4830 } 4831 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4832 hci_stack->ssp_authentication_requirement = authentication_requirement; 4833 } 4834 4835 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4836 void gap_ssp_set_auto_accept(int auto_accept){ 4837 hci_stack->ssp_auto_accept = auto_accept; 4838 } 4839 4840 void gap_secure_connections_enable(bool enable){ 4841 hci_stack->secure_connections_enable = enable; 4842 } 4843 4844 #endif 4845 4846 // va_list part of hci_send_cmd 4847 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4848 if (!hci_can_send_command_packet_now()){ 4849 log_error("hci_send_cmd called but cannot send packet now"); 4850 return 0; 4851 } 4852 4853 // for HCI INITIALIZATION 4854 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4855 hci_stack->last_cmd_opcode = cmd->opcode; 4856 4857 hci_reserve_packet_buffer(); 4858 uint8_t * packet = hci_stack->hci_packet_buffer; 4859 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4860 int err = hci_send_cmd_packet(packet, size); 4861 4862 // release packet buffer on error or for synchronous transport implementations 4863 if ((err < 0) || hci_transport_synchronous()){ 4864 hci_release_packet_buffer(); 4865 hci_emit_transport_packet_sent(); 4866 } 4867 4868 return err; 4869 } 4870 4871 /** 4872 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4873 */ 4874 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4875 va_list argptr; 4876 va_start(argptr, cmd); 4877 int res = hci_send_cmd_va_arg(cmd, argptr); 4878 va_end(argptr); 4879 return res; 4880 } 4881 4882 // Create various non-HCI events. 4883 // TODO: generalize, use table similar to hci_create_command 4884 4885 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4886 // dump packet 4887 if (dump) { 4888 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4889 } 4890 4891 // dispatch to all event handlers 4892 btstack_linked_list_iterator_t it; 4893 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4894 while (btstack_linked_list_iterator_has_next(&it)){ 4895 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4896 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4897 } 4898 } 4899 4900 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4901 if (!hci_stack->acl_packet_handler) return; 4902 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4903 } 4904 4905 #ifdef ENABLE_CLASSIC 4906 static void hci_notify_if_sco_can_send_now(void){ 4907 // notify SCO sender if waiting 4908 if (!hci_stack->sco_waiting_for_can_send_now) return; 4909 if (hci_can_send_sco_packet_now()){ 4910 hci_stack->sco_waiting_for_can_send_now = 0; 4911 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4912 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4913 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4914 } 4915 } 4916 4917 // parsing end emitting has been merged to reduce code size 4918 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4919 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4920 4921 uint8_t * eir_data; 4922 ad_context_t context; 4923 const uint8_t * name; 4924 uint8_t name_len; 4925 4926 if (size < 3) return; 4927 4928 int event_type = hci_event_packet_get_type(packet); 4929 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4930 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4931 4932 switch (event_type){ 4933 case HCI_EVENT_INQUIRY_RESULT: 4934 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4935 if (size != (3 + (num_responses * 14))) return; 4936 break; 4937 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4938 if (size != 257) return; 4939 if (num_responses != 1) return; 4940 break; 4941 default: 4942 return; 4943 } 4944 4945 // event[1] is set at the end 4946 int i; 4947 for (i=0; i<num_responses;i++){ 4948 memset(event, 0, sizeof(event)); 4949 event[0] = GAP_EVENT_INQUIRY_RESULT; 4950 uint8_t event_size = 18; // if name is not set by EIR 4951 4952 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4953 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4954 (void)memcpy(&event[9], 4955 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4956 3); // class of device 4957 (void)memcpy(&event[12], 4958 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4959 2); // clock offset 4960 4961 switch (event_type){ 4962 case HCI_EVENT_INQUIRY_RESULT: 4963 // 14,15,16,17 = 0, size 18 4964 break; 4965 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4966 event[14] = 1; 4967 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4968 // 16,17 = 0, size 18 4969 break; 4970 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4971 event[14] = 1; 4972 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4973 // EIR packets only contain a single inquiry response 4974 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4975 name = NULL; 4976 // Iterate over EIR data 4977 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4978 uint8_t data_type = ad_iterator_get_data_type(&context); 4979 uint8_t data_size = ad_iterator_get_data_len(&context); 4980 const uint8_t * data = ad_iterator_get_data(&context); 4981 // Prefer Complete Local Name over Shortend Local Name 4982 switch (data_type){ 4983 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4984 if (name) continue; 4985 /* fall through */ 4986 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4987 name = data; 4988 name_len = data_size; 4989 break; 4990 default: 4991 break; 4992 } 4993 } 4994 if (name){ 4995 event[16] = 1; 4996 // truncate name if needed 4997 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4998 event[17] = len; 4999 (void)memcpy(&event[18], name, len); 5000 event_size += len; 5001 } 5002 break; 5003 default: 5004 return; 5005 } 5006 event[1] = event_size - 2; 5007 hci_emit_event(event, event_size, 1); 5008 } 5009 } 5010 #endif 5011 5012 void hci_emit_state(void){ 5013 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5014 uint8_t event[3]; 5015 event[0] = BTSTACK_EVENT_STATE; 5016 event[1] = sizeof(event) - 2u; 5017 event[2] = hci_stack->state; 5018 hci_emit_event(event, sizeof(event), 1); 5019 } 5020 5021 #ifdef ENABLE_CLASSIC 5022 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5023 uint8_t event[13]; 5024 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5025 event[1] = sizeof(event) - 2; 5026 event[2] = status; 5027 little_endian_store_16(event, 3, con_handle); 5028 reverse_bd_addr(address, &event[5]); 5029 event[11] = 1; // ACL connection 5030 event[12] = 0; // encryption disabled 5031 hci_emit_event(event, sizeof(event), 1); 5032 } 5033 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5034 if (disable_l2cap_timeouts) return; 5035 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5036 uint8_t event[4]; 5037 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5038 event[1] = sizeof(event) - 2; 5039 little_endian_store_16(event, 2, conn->con_handle); 5040 hci_emit_event(event, sizeof(event), 1); 5041 } 5042 #endif 5043 5044 #ifdef ENABLE_BLE 5045 #ifdef ENABLE_LE_CENTRAL 5046 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){ 5047 uint8_t event[21]; 5048 event[0] = HCI_EVENT_LE_META; 5049 event[1] = sizeof(event) - 2u; 5050 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5051 event[3] = status; 5052 little_endian_store_16(event, 4, con_handle); 5053 event[6] = 0; // TODO: role 5054 event[7] = address_type; 5055 reverse_bd_addr(address, &event[8]); 5056 little_endian_store_16(event, 14, 0); // interval 5057 little_endian_store_16(event, 16, 0); // latency 5058 little_endian_store_16(event, 18, 0); // supervision timeout 5059 event[20] = 0; // master clock accuracy 5060 hci_emit_event(event, sizeof(event), 1); 5061 } 5062 #endif 5063 #endif 5064 5065 static void hci_emit_transport_packet_sent(void){ 5066 // notify upper stack that it might be possible to send again 5067 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5068 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5069 } 5070 5071 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5072 uint8_t event[6]; 5073 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5074 event[1] = sizeof(event) - 2u; 5075 event[2] = 0; // status = OK 5076 little_endian_store_16(event, 3, con_handle); 5077 event[5] = reason; 5078 hci_emit_event(event, sizeof(event), 1); 5079 } 5080 5081 static void hci_emit_nr_connections_changed(void){ 5082 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5083 uint8_t event[3]; 5084 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5085 event[1] = sizeof(event) - 2u; 5086 event[2] = nr_hci_connections(); 5087 hci_emit_event(event, sizeof(event), 1); 5088 } 5089 5090 static void hci_emit_hci_open_failed(void){ 5091 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5092 uint8_t event[2]; 5093 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5094 event[1] = sizeof(event) - 2u; 5095 hci_emit_event(event, sizeof(event), 1); 5096 } 5097 5098 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5099 log_info("hci_emit_dedicated_bonding_result %u ", status); 5100 uint8_t event[9]; 5101 int pos = 0; 5102 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5103 event[pos++] = sizeof(event) - 2u; 5104 event[pos++] = status; 5105 reverse_bd_addr(address, &event[pos]); 5106 hci_emit_event(event, sizeof(event), 1); 5107 } 5108 5109 5110 #ifdef ENABLE_CLASSIC 5111 5112 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5113 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5114 uint8_t event[5]; 5115 int pos = 0; 5116 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5117 event[pos++] = sizeof(event) - 2; 5118 little_endian_store_16(event, 2, con_handle); 5119 pos += 2; 5120 event[pos++] = level; 5121 hci_emit_event(event, sizeof(event), 1); 5122 } 5123 5124 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5125 if (!connection) return LEVEL_0; 5126 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5127 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5128 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5129 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5130 // LEVEL 4 always requires 128 bit encrytion key size 5131 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5132 security_level = LEVEL_3; 5133 } 5134 return security_level; 5135 } 5136 5137 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5138 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5139 uint8_t event[3]; 5140 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5141 event[1] = sizeof(event) - 2; 5142 event[2] = enabled; 5143 hci_emit_event(event, sizeof(event), 1); 5144 } 5145 5146 // query if remote side supports eSCO 5147 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5148 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5149 if (!connection) return 0; 5150 return (connection->remote_supported_features[0] & 1) != 0; 5151 } 5152 5153 static bool hci_ssp_supported(hci_connection_t * connection){ 5154 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5155 return (connection->bonding_flags & mask) == mask; 5156 } 5157 5158 // query if remote side supports SSP 5159 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5160 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5161 if (!connection) return 0; 5162 return hci_ssp_supported(connection) ? 1 : 0; 5163 } 5164 5165 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5166 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5167 } 5168 5169 // GAP API 5170 /** 5171 * @bbrief enable/disable bonding. default is enabled 5172 * @praram enabled 5173 */ 5174 void gap_set_bondable_mode(int enable){ 5175 hci_stack->bondable = enable ? 1 : 0; 5176 } 5177 /** 5178 * @brief Get bondable mode. 5179 * @return 1 if bondable 5180 */ 5181 int gap_get_bondable_mode(void){ 5182 return hci_stack->bondable; 5183 } 5184 5185 /** 5186 * @brief map link keys to security levels 5187 */ 5188 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5189 switch (link_key_type){ 5190 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5191 return LEVEL_4; 5192 case COMBINATION_KEY: 5193 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5194 return LEVEL_3; 5195 default: 5196 return LEVEL_2; 5197 } 5198 } 5199 5200 /** 5201 * @brief map link keys to secure connection yes/no 5202 */ 5203 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5204 switch (link_key_type){ 5205 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5206 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5207 return 1; 5208 default: 5209 return 0; 5210 } 5211 } 5212 5213 /** 5214 * @brief map link keys to authenticated 5215 */ 5216 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5217 switch (link_key_type){ 5218 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5219 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5220 return 1; 5221 default: 5222 return 0; 5223 } 5224 } 5225 5226 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5227 log_info("gap_mitm_protection_required_for_security_level %u", level); 5228 return level > LEVEL_2; 5229 } 5230 5231 /** 5232 * @brief get current security level 5233 */ 5234 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5235 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5236 if (!connection) return LEVEL_0; 5237 return gap_security_level_for_connection(connection); 5238 } 5239 5240 /** 5241 * @brief request connection to device to 5242 * @result GAP_AUTHENTICATION_RESULT 5243 */ 5244 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5245 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5246 if (!connection){ 5247 hci_emit_security_level(con_handle, LEVEL_0); 5248 return; 5249 } 5250 5251 btstack_assert(hci_is_le_connection(connection) == false); 5252 5253 gap_security_level_t current_level = gap_security_level(con_handle); 5254 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5255 requested_level, connection->requested_security_level, current_level); 5256 5257 // assumption: earlier requested security higher than current level => security request is active 5258 if (current_level < connection->requested_security_level){ 5259 if (connection->requested_security_level < requested_level){ 5260 // increase requested level as new level is higher 5261 5262 // TODO: handle re-authentication when done 5263 5264 connection->requested_security_level = requested_level; 5265 } 5266 return; 5267 } 5268 5269 // no request active, notify if security sufficient 5270 if (requested_level <= current_level){ 5271 hci_emit_security_level(con_handle, current_level); 5272 return; 5273 } 5274 5275 // store request 5276 connection->requested_security_level = requested_level; 5277 5278 // start to authenticate connection if authentication not already active 5279 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5280 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5281 hci_run(); 5282 } 5283 5284 /** 5285 * @brief start dedicated bonding with device. disconnect after bonding 5286 * @param device 5287 * @param request MITM protection 5288 * @result GAP_DEDICATED_BONDING_COMPLETE 5289 */ 5290 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5291 5292 // create connection state machine 5293 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5294 5295 if (!connection){ 5296 return BTSTACK_MEMORY_ALLOC_FAILED; 5297 } 5298 5299 // delete linkn key 5300 gap_drop_link_key_for_bd_addr(device); 5301 5302 // configure LEVEL_2/3, dedicated bonding 5303 connection->state = SEND_CREATE_CONNECTION; 5304 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5305 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5306 connection->bonding_flags = BONDING_DEDICATED; 5307 5308 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5309 5310 // handle: connnection failure (connection complete != ok) 5311 // handle: authentication failure 5312 // handle: disconnect on done 5313 5314 hci_run(); 5315 5316 return 0; 5317 } 5318 #endif 5319 5320 void gap_set_local_name(const char * local_name){ 5321 hci_stack->local_name = local_name; 5322 } 5323 5324 5325 #ifdef ENABLE_BLE 5326 5327 #ifdef ENABLE_LE_CENTRAL 5328 void gap_start_scan(void){ 5329 hci_stack->le_scanning_enabled = true; 5330 hci_run(); 5331 } 5332 5333 void gap_stop_scan(void){ 5334 hci_stack->le_scanning_enabled = false; 5335 hci_run(); 5336 } 5337 5338 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5339 hci_stack->le_scan_type = scan_type; 5340 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5341 hci_stack->le_scan_interval = scan_interval; 5342 hci_stack->le_scan_window = scan_window; 5343 hci_stack->le_scanning_param_update = true; 5344 hci_run(); 5345 } 5346 5347 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5348 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5349 } 5350 5351 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5352 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5353 if (!conn){ 5354 // disallow if le connection is already outgoing 5355 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5356 log_error("le connection already active"); 5357 return ERROR_CODE_COMMAND_DISALLOWED; 5358 } 5359 5360 log_info("gap_connect: no connection exists yet, creating context"); 5361 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5362 if (!conn){ 5363 // notify client that alloc failed 5364 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5365 log_info("gap_connect: failed to alloc hci_connection_t"); 5366 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5367 } 5368 5369 // set le connecting state 5370 if (hci_is_le_connection_type(addr_type)){ 5371 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5372 } 5373 5374 conn->state = SEND_CREATE_CONNECTION; 5375 log_info("gap_connect: send create connection next"); 5376 hci_run(); 5377 return ERROR_CODE_SUCCESS; 5378 } 5379 5380 if (!hci_is_le_connection(conn) || 5381 (conn->state == SEND_CREATE_CONNECTION) || 5382 (conn->state == SENT_CREATE_CONNECTION)) { 5383 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5384 log_error("gap_connect: classic connection or connect is already being created"); 5385 return GATT_CLIENT_IN_WRONG_STATE; 5386 } 5387 5388 // check if connection was just disconnected 5389 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5390 log_info("gap_connect: send create connection (again)"); 5391 conn->state = SEND_CREATE_CONNECTION; 5392 hci_run(); 5393 return ERROR_CODE_SUCCESS; 5394 } 5395 5396 log_info("gap_connect: context exists with state %u", conn->state); 5397 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5398 hci_run(); 5399 return ERROR_CODE_SUCCESS; 5400 } 5401 5402 // @assumption: only a single outgoing LE Connection exists 5403 static hci_connection_t * gap_get_outgoing_connection(void){ 5404 btstack_linked_item_t *it; 5405 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5406 hci_connection_t * conn = (hci_connection_t *) it; 5407 if (!hci_is_le_connection(conn)) continue; 5408 switch (conn->state){ 5409 case SEND_CREATE_CONNECTION: 5410 case SENT_CREATE_CONNECTION: 5411 case SENT_CANCEL_CONNECTION: 5412 return conn; 5413 default: 5414 break; 5415 }; 5416 } 5417 return NULL; 5418 } 5419 5420 uint8_t gap_connect_cancel(void){ 5421 hci_connection_t * conn = gap_get_outgoing_connection(); 5422 if (!conn) return 0; 5423 switch (conn->state){ 5424 case SEND_CREATE_CONNECTION: 5425 // skip sending create connection and emit event instead 5426 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5427 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5428 btstack_memory_hci_connection_free( conn ); 5429 break; 5430 case SENT_CREATE_CONNECTION: 5431 // request to send cancel connection 5432 conn->state = SEND_CANCEL_CONNECTION; 5433 hci_run(); 5434 break; 5435 default: 5436 break; 5437 } 5438 return 0; 5439 } 5440 #endif 5441 5442 #ifdef ENABLE_LE_CENTRAL 5443 /** 5444 * @brief Set connection parameters for outgoing connections 5445 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5446 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5447 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5448 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5449 * @param conn_latency, default: 4 5450 * @param supervision_timeout (unit: 10ms), default: 720 ms 5451 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5452 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5453 */ 5454 5455 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5456 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5457 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5458 hci_stack->le_connection_scan_interval = conn_scan_interval; 5459 hci_stack->le_connection_scan_window = conn_scan_window; 5460 hci_stack->le_connection_interval_min = conn_interval_min; 5461 hci_stack->le_connection_interval_max = conn_interval_max; 5462 hci_stack->le_connection_latency = conn_latency; 5463 hci_stack->le_supervision_timeout = supervision_timeout; 5464 hci_stack->le_minimum_ce_length = min_ce_length; 5465 hci_stack->le_maximum_ce_length = max_ce_length; 5466 } 5467 #endif 5468 5469 /** 5470 * @brief Updates the connection parameters for a given LE connection 5471 * @param handle 5472 * @param conn_interval_min (unit: 1.25ms) 5473 * @param conn_interval_max (unit: 1.25ms) 5474 * @param conn_latency 5475 * @param supervision_timeout (unit: 10ms) 5476 * @returns 0 if ok 5477 */ 5478 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5479 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5480 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5481 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5482 connection->le_conn_interval_min = conn_interval_min; 5483 connection->le_conn_interval_max = conn_interval_max; 5484 connection->le_conn_latency = conn_latency; 5485 connection->le_supervision_timeout = supervision_timeout; 5486 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5487 hci_run(); 5488 return 0; 5489 } 5490 5491 /** 5492 * @brief Request an update of the connection parameter for a given LE connection 5493 * @param handle 5494 * @param conn_interval_min (unit: 1.25ms) 5495 * @param conn_interval_max (unit: 1.25ms) 5496 * @param conn_latency 5497 * @param supervision_timeout (unit: 10ms) 5498 * @returns 0 if ok 5499 */ 5500 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5501 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5502 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5503 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5504 connection->le_conn_interval_min = conn_interval_min; 5505 connection->le_conn_interval_max = conn_interval_max; 5506 connection->le_conn_latency = conn_latency; 5507 connection->le_supervision_timeout = supervision_timeout; 5508 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5509 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5510 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5511 return 0; 5512 } 5513 5514 #ifdef ENABLE_LE_PERIPHERAL 5515 5516 /** 5517 * @brief Set Advertisement Data 5518 * @param advertising_data_length 5519 * @param advertising_data (max 31 octets) 5520 * @note data is not copied, pointer has to stay valid 5521 */ 5522 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5523 hci_stack->le_advertisements_data_len = advertising_data_length; 5524 hci_stack->le_advertisements_data = advertising_data; 5525 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5526 hci_run(); 5527 } 5528 5529 /** 5530 * @brief Set Scan Response Data 5531 * @param advertising_data_length 5532 * @param advertising_data (max 31 octets) 5533 * @note data is not copied, pointer has to stay valid 5534 */ 5535 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5536 hci_stack->le_scan_response_data_len = scan_response_data_length; 5537 hci_stack->le_scan_response_data = scan_response_data; 5538 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5539 hci_run(); 5540 } 5541 5542 /** 5543 * @brief Set Advertisement Parameters 5544 * @param adv_int_min 5545 * @param adv_int_max 5546 * @param adv_type 5547 * @param direct_address_type 5548 * @param direct_address 5549 * @param channel_map 5550 * @param filter_policy 5551 * 5552 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5553 */ 5554 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5555 uint8_t direct_address_typ, bd_addr_t direct_address, 5556 uint8_t channel_map, uint8_t filter_policy) { 5557 5558 hci_stack->le_advertisements_interval_min = adv_int_min; 5559 hci_stack->le_advertisements_interval_max = adv_int_max; 5560 hci_stack->le_advertisements_type = adv_type; 5561 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5562 hci_stack->le_advertisements_channel_map = channel_map; 5563 hci_stack->le_advertisements_filter_policy = filter_policy; 5564 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5565 6); 5566 5567 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5568 hci_run(); 5569 } 5570 5571 /** 5572 * @brief Enable/Disable Advertisements 5573 * @param enabled 5574 */ 5575 void gap_advertisements_enable(int enabled){ 5576 hci_stack->le_advertisements_enabled = enabled != 0; 5577 hci_update_advertisements_enabled_for_current_roles(); 5578 hci_run(); 5579 } 5580 5581 #endif 5582 5583 void hci_le_set_own_address_type(uint8_t own_address_type){ 5584 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5585 if (own_address_type == hci_stack->le_own_addr_type) return; 5586 hci_stack->le_own_addr_type = own_address_type; 5587 5588 #ifdef ENABLE_LE_PERIPHERAL 5589 // update advertisement parameters, too 5590 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5591 hci_run(); 5592 #endif 5593 #ifdef ENABLE_LE_CENTRAL 5594 // note: we don't update scan parameters or modify ongoing connection attempts 5595 #endif 5596 } 5597 5598 #endif 5599 5600 uint8_t gap_disconnect(hci_con_handle_t handle){ 5601 hci_connection_t * conn = hci_connection_for_handle(handle); 5602 if (!conn){ 5603 hci_emit_disconnection_complete(handle, 0); 5604 return 0; 5605 } 5606 // ignore if already disconnected 5607 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5608 return 0; 5609 } 5610 conn->state = SEND_DISCONNECT; 5611 hci_run(); 5612 return 0; 5613 } 5614 5615 int gap_read_rssi(hci_con_handle_t con_handle){ 5616 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5617 if (hci_connection == NULL) return 0; 5618 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5619 hci_run(); 5620 return 1; 5621 } 5622 5623 /** 5624 * @brief Get connection type 5625 * @param con_handle 5626 * @result connection_type 5627 */ 5628 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5629 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5630 if (!conn) return GAP_CONNECTION_INVALID; 5631 switch (conn->address_type){ 5632 case BD_ADDR_TYPE_LE_PUBLIC: 5633 case BD_ADDR_TYPE_LE_RANDOM: 5634 return GAP_CONNECTION_LE; 5635 case BD_ADDR_TYPE_SCO: 5636 return GAP_CONNECTION_SCO; 5637 case BD_ADDR_TYPE_ACL: 5638 return GAP_CONNECTION_ACL; 5639 default: 5640 return GAP_CONNECTION_INVALID; 5641 } 5642 } 5643 5644 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5645 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5646 if (!conn) return HCI_ROLE_INVALID; 5647 return (hci_role_t) conn->role; 5648 } 5649 5650 5651 #ifdef ENABLE_CLASSIC 5652 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5653 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5654 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5655 conn->request_role = role; 5656 hci_run(); 5657 return ERROR_CODE_SUCCESS; 5658 } 5659 #endif 5660 5661 #ifdef ENABLE_BLE 5662 5663 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){ 5664 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5665 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5666 5667 conn->le_phy_update_all_phys = all_phys; 5668 conn->le_phy_update_tx_phys = tx_phys; 5669 conn->le_phy_update_rx_phys = rx_phys; 5670 conn->le_phy_update_phy_options = phy_options; 5671 5672 hci_run(); 5673 5674 return 0; 5675 } 5676 5677 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5678 // check if already in list 5679 btstack_linked_list_iterator_t it; 5680 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5681 while (btstack_linked_list_iterator_has_next(&it)) { 5682 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5683 if (entry->address_type != address_type) { 5684 continue; 5685 } 5686 if (memcmp(entry->address, address, 6) != 0) { 5687 continue; 5688 } 5689 // disallow if already scheduled to add 5690 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5691 return ERROR_CODE_COMMAND_DISALLOWED; 5692 } 5693 // still on controller, but scheduled to remove -> re-add 5694 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5695 return ERROR_CODE_SUCCESS; 5696 } 5697 // alloc and add to list 5698 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5699 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5700 entry->address_type = address_type; 5701 (void)memcpy(entry->address, address, 6); 5702 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5703 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5704 return ERROR_CODE_SUCCESS; 5705 } 5706 5707 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5708 btstack_linked_list_iterator_t it; 5709 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5710 while (btstack_linked_list_iterator_has_next(&it)){ 5711 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5712 if (entry->address_type != address_type) { 5713 continue; 5714 } 5715 if (memcmp(entry->address, address, 6) != 0) { 5716 continue; 5717 } 5718 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5719 // remove from controller if already present 5720 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5721 } else { 5722 // directly remove entry from whitelist 5723 btstack_linked_list_iterator_remove(&it); 5724 btstack_memory_whitelist_entry_free(entry); 5725 } 5726 return ERROR_CODE_SUCCESS; 5727 } 5728 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5729 } 5730 5731 static void hci_whitelist_clear(void){ 5732 btstack_linked_list_iterator_t it; 5733 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5734 while (btstack_linked_list_iterator_has_next(&it)){ 5735 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5736 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5737 // remove from controller if already present 5738 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5739 continue; 5740 } 5741 // directly remove entry from whitelist 5742 btstack_linked_list_iterator_remove(&it); 5743 btstack_memory_whitelist_entry_free(entry); 5744 } 5745 } 5746 5747 /** 5748 * @brief Clear Whitelist 5749 * @returns 0 if ok 5750 */ 5751 uint8_t gap_whitelist_clear(void){ 5752 hci_whitelist_clear(); 5753 hci_run(); 5754 return ERROR_CODE_SUCCESS; 5755 } 5756 5757 /** 5758 * @brief Add Device to Whitelist 5759 * @param address_typ 5760 * @param address 5761 * @returns 0 if ok 5762 */ 5763 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5764 uint8_t status = hci_whitelist_add(address_type, address); 5765 if (status){ 5766 return status; 5767 } 5768 hci_run(); 5769 return ERROR_CODE_SUCCESS; 5770 } 5771 5772 /** 5773 * @brief Remove Device from Whitelist 5774 * @param address_typ 5775 * @param address 5776 * @returns 0 if ok 5777 */ 5778 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5779 uint8_t status = hci_whitelist_remove(address_type, address); 5780 if (status){ 5781 return status; 5782 } 5783 hci_run(); 5784 return ERROR_CODE_SUCCESS; 5785 } 5786 5787 #ifdef ENABLE_LE_CENTRAL 5788 /** 5789 * @brief Connect with Whitelist 5790 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5791 * @returns - if ok 5792 */ 5793 uint8_t gap_connect_with_whitelist(void){ 5794 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5795 return ERROR_CODE_COMMAND_DISALLOWED; 5796 } 5797 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5798 hci_run(); 5799 return ERROR_CODE_SUCCESS; 5800 } 5801 5802 /** 5803 * @brief Auto Connection Establishment - Start Connecting to device 5804 * @param address_typ 5805 * @param address 5806 * @returns 0 if ok 5807 */ 5808 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5809 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5810 return ERROR_CODE_COMMAND_DISALLOWED; 5811 } 5812 5813 uint8_t status = hci_whitelist_add(address_type, address); 5814 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5815 return status; 5816 } 5817 5818 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5819 5820 hci_run(); 5821 return ERROR_CODE_SUCCESS; 5822 } 5823 5824 /** 5825 * @brief Auto Connection Establishment - Stop Connecting to device 5826 * @param address_typ 5827 * @param address 5828 * @returns 0 if ok 5829 */ 5830 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5831 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5832 return ERROR_CODE_COMMAND_DISALLOWED; 5833 } 5834 5835 hci_whitelist_remove(address_type, address); 5836 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5837 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5838 } 5839 hci_run(); 5840 return 0; 5841 } 5842 5843 /** 5844 * @brief Auto Connection Establishment - Stop everything 5845 * @note Convenience function to stop all active auto connection attempts 5846 */ 5847 uint8_t gap_auto_connection_stop_all(void){ 5848 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5849 return ERROR_CODE_COMMAND_DISALLOWED; 5850 } 5851 hci_whitelist_clear(); 5852 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5853 hci_run(); 5854 return ERROR_CODE_SUCCESS; 5855 } 5856 5857 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5858 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5859 if (!conn) return 0; 5860 return conn->le_connection_interval; 5861 } 5862 #endif 5863 #endif 5864 5865 #ifdef ENABLE_CLASSIC 5866 /** 5867 * @brief Set Extended Inquiry Response data 5868 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5869 * @note has to be done before stack starts up 5870 */ 5871 void gap_set_extended_inquiry_response(const uint8_t * data){ 5872 hci_stack->eir_data = data; 5873 } 5874 5875 /** 5876 * @brief Start GAP Classic Inquiry 5877 * @param duration in 1.28s units 5878 * @return 0 if ok 5879 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5880 */ 5881 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5882 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5883 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5884 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5885 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5886 } 5887 hci_stack->inquiry_state = duration_in_1280ms_units; 5888 hci_run(); 5889 return 0; 5890 } 5891 5892 /** 5893 * @brief Stop GAP Classic Inquiry 5894 * @returns 0 if ok 5895 */ 5896 int gap_inquiry_stop(void){ 5897 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5898 // emit inquiry complete event, before it even started 5899 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5900 hci_emit_event(event, sizeof(event), 1); 5901 return 0; 5902 } 5903 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5904 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5905 hci_run(); 5906 return 0; 5907 } 5908 5909 5910 /** 5911 * @brief Remote Name Request 5912 * @param addr 5913 * @param page_scan_repetition_mode 5914 * @param clock_offset only used when bit 15 is set 5915 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5916 */ 5917 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5918 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5919 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5920 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5921 hci_stack->remote_name_clock_offset = clock_offset; 5922 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5923 hci_run(); 5924 return 0; 5925 } 5926 5927 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5928 hci_stack->gap_pairing_state = state; 5929 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5930 hci_run(); 5931 return 0; 5932 } 5933 5934 /** 5935 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5936 * @param addr 5937 * @param pin_data 5938 * @param pin_len 5939 * @return 0 if ok 5940 */ 5941 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5942 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5943 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5944 hci_stack->gap_pairing_pin_len = pin_len; 5945 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5946 } 5947 5948 /** 5949 * @brief Legacy Pairing Pin Code Response 5950 * @param addr 5951 * @param pin 5952 * @return 0 if ok 5953 */ 5954 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5955 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5956 } 5957 5958 /** 5959 * @brief Abort Legacy Pairing 5960 * @param addr 5961 * @param pin 5962 * @return 0 if ok 5963 */ 5964 int gap_pin_code_negative(bd_addr_t addr){ 5965 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5966 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5967 } 5968 5969 /** 5970 * @brief SSP Passkey Response 5971 * @param addr 5972 * @param passkey 5973 * @return 0 if ok 5974 */ 5975 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5976 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5977 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5978 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5979 } 5980 5981 /** 5982 * @brief Abort SSP Passkey Entry/Pairing 5983 * @param addr 5984 * @param pin 5985 * @return 0 if ok 5986 */ 5987 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5988 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5989 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5990 } 5991 5992 /** 5993 * @brief Accept SSP Numeric Comparison 5994 * @param addr 5995 * @param passkey 5996 * @return 0 if ok 5997 */ 5998 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5999 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6000 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6001 } 6002 6003 /** 6004 * @brief Abort SSP Numeric Comparison/Pairing 6005 * @param addr 6006 * @param pin 6007 * @return 0 if ok 6008 */ 6009 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6010 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6011 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6012 } 6013 6014 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6015 6016 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6017 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6018 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6019 connectionSetAuthenticationFlags(conn, flag); 6020 hci_run(); 6021 return ERROR_CODE_SUCCESS; 6022 } 6023 6024 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6025 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6026 } 6027 6028 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6029 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6030 } 6031 #endif 6032 6033 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6034 /** 6035 * @brief Report Remote OOB Data 6036 * @param bd_addr 6037 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6038 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6039 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6040 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6041 */ 6042 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 6043 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6044 if (connection == NULL) { 6045 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6046 } 6047 connection->classic_oob_c_192 = c_192; 6048 connection->classic_oob_r_192 = r_192; 6049 connection->classic_oob_c_256 = c_256; 6050 connection->classic_oob_r_256 = r_256; 6051 return ERROR_CODE_SUCCESS; 6052 } 6053 /** 6054 * @brief Generate new OOB data 6055 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6056 */ 6057 void gap_ssp_generate_oob_data(void){ 6058 hci_stack->classic_read_local_oob_data = true; 6059 hci_run(); 6060 } 6061 6062 #endif 6063 6064 /** 6065 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6066 * @param inquiry_mode see bluetooth_defines.h 6067 */ 6068 void hci_set_inquiry_mode(inquiry_mode_t mode){ 6069 hci_stack->inquiry_mode = mode; 6070 } 6071 6072 /** 6073 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6074 */ 6075 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6076 hci_stack->sco_voice_setting = voice_setting; 6077 } 6078 6079 /** 6080 * @brief Get SCO Voice Setting 6081 * @return current voice setting 6082 */ 6083 uint16_t hci_get_sco_voice_setting(void){ 6084 return hci_stack->sco_voice_setting; 6085 } 6086 6087 static int hci_have_usb_transport(void){ 6088 if (!hci_stack->hci_transport) return 0; 6089 const char * transport_name = hci_stack->hci_transport->name; 6090 if (!transport_name) return 0; 6091 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6092 } 6093 6094 /** @brief Get SCO packet length for current SCO Voice setting 6095 * @note Using SCO packets of the exact length is required for USB transfer 6096 * @return Length of SCO packets in bytes (not audio frames) 6097 */ 6098 int hci_get_sco_packet_length(void){ 6099 int sco_packet_length = 0; 6100 int multiplier; 6101 #ifdef ENABLE_SCO_OVER_HCI 6102 6103 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6104 multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6105 6106 if (hci_have_usb_transport()){ 6107 // see Core Spec for H2 USB Transfer. 6108 // 3 byte SCO header + 24 bytes per connection 6109 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6110 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6111 } else { 6112 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6113 sco_packet_length = 3 + 60 * multiplier; 6114 // assert that it still fits inside an SCO buffer 6115 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6116 sco_packet_length = 3 + 60; 6117 } 6118 } 6119 #endif 6120 6121 #ifdef HAVE_SCO_TRANSPORT 6122 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6123 multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6124 sco_packet_length = 3 + 60 * multiplier; 6125 #endif 6126 6127 return sco_packet_length; 6128 } 6129 6130 /** 6131 * @brief Sets the master/slave policy 6132 * @param policy (0: attempt to become master, 1: let connecting device decide) 6133 */ 6134 void hci_set_master_slave_policy(uint8_t policy){ 6135 hci_stack->master_slave_policy = policy; 6136 } 6137 6138 #endif 6139 6140 HCI_STATE hci_get_state(void){ 6141 return hci_stack->state; 6142 } 6143 6144 #ifdef ENABLE_CLASSIC 6145 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6146 hci_stack->gap_classic_accept_callback = accept_callback; 6147 } 6148 #endif 6149 6150 /** 6151 * @brief Set callback for Bluetooth Hardware Error 6152 */ 6153 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6154 hci_stack->hardware_error_callback = fn; 6155 } 6156 6157 void hci_disconnect_all(void){ 6158 btstack_linked_list_iterator_t it; 6159 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6160 while (btstack_linked_list_iterator_has_next(&it)){ 6161 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6162 if (con->state == SENT_DISCONNECT) continue; 6163 con->state = SEND_DISCONNECT; 6164 } 6165 hci_run(); 6166 } 6167 6168 uint16_t hci_get_manufacturer(void){ 6169 return hci_stack->manufacturer; 6170 } 6171 6172 #ifdef ENABLE_BLE 6173 6174 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6175 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6176 if (!hci_con) return NULL; 6177 return &hci_con->sm_connection; 6178 } 6179 6180 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6181 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6182 6183 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6184 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6185 if (hci_connection == NULL) return 0; 6186 if (hci_is_le_connection(hci_connection)){ 6187 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6188 if (sm_conn->sm_connection_encrypted) { 6189 return sm_conn->sm_actual_encryption_key_size; 6190 } 6191 } 6192 #ifdef ENABLE_CLASSIC 6193 else { 6194 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6195 return hci_connection->encryption_key_size; 6196 } 6197 } 6198 #endif 6199 return 0; 6200 } 6201 6202 int gap_authenticated(hci_con_handle_t con_handle){ 6203 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6204 if (hci_connection == NULL) return 0; 6205 6206 switch (hci_connection->address_type){ 6207 case BD_ADDR_TYPE_LE_PUBLIC: 6208 case BD_ADDR_TYPE_LE_RANDOM: 6209 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6210 return hci_connection->sm_connection.sm_connection_authenticated; 6211 #ifdef ENABLE_CLASSIC 6212 case BD_ADDR_TYPE_SCO: 6213 case BD_ADDR_TYPE_ACL: 6214 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6215 #endif 6216 default: 6217 return 0; 6218 } 6219 } 6220 6221 int gap_secure_connection(hci_con_handle_t con_handle){ 6222 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6223 if (hci_connection == NULL) return 0; 6224 6225 switch (hci_connection->address_type){ 6226 case BD_ADDR_TYPE_LE_PUBLIC: 6227 case BD_ADDR_TYPE_LE_RANDOM: 6228 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6229 return hci_connection->sm_connection.sm_connection_sc; 6230 #ifdef ENABLE_CLASSIC 6231 case BD_ADDR_TYPE_SCO: 6232 case BD_ADDR_TYPE_ACL: 6233 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6234 #endif 6235 default: 6236 return 0; 6237 } 6238 } 6239 6240 bool gap_bonded(hci_con_handle_t con_handle){ 6241 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6242 if (hci_connection == NULL) return 0; 6243 6244 #ifdef ENABLE_CLASSIC 6245 link_key_t link_key; 6246 link_key_type_t link_key_type; 6247 #endif 6248 switch (hci_connection->address_type){ 6249 case BD_ADDR_TYPE_LE_PUBLIC: 6250 case BD_ADDR_TYPE_LE_RANDOM: 6251 return hci_connection->sm_connection.sm_le_db_index >= 0; 6252 #ifdef ENABLE_CLASSIC 6253 case BD_ADDR_TYPE_SCO: 6254 case BD_ADDR_TYPE_ACL: 6255 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6256 #endif 6257 default: 6258 return false; 6259 } 6260 } 6261 6262 6263 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6264 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6265 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6266 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6267 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6268 return sm_conn->sm_connection_authorization_state; 6269 } 6270 #endif 6271 6272 #ifdef ENABLE_CLASSIC 6273 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){ 6274 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6275 if (!conn) return GAP_CONNECTION_INVALID; 6276 conn->sniff_min_interval = sniff_min_interval; 6277 conn->sniff_max_interval = sniff_max_interval; 6278 conn->sniff_attempt = sniff_attempt; 6279 conn->sniff_timeout = sniff_timeout; 6280 hci_run(); 6281 return 0; 6282 } 6283 6284 /** 6285 * @brief Exit Sniff mode 6286 * @param con_handle 6287 @ @return 0 if ok 6288 */ 6289 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6290 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6291 if (!conn) return GAP_CONNECTION_INVALID; 6292 conn->sniff_min_interval = 0xffff; 6293 hci_run(); 6294 return 0; 6295 } 6296 #endif 6297 6298 void hci_halting_defer(void){ 6299 if (hci_stack->state != HCI_STATE_HALTING) return; 6300 switch (hci_stack->substate){ 6301 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6302 case HCI_HALTING_CLOSE: 6303 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6304 break; 6305 default: 6306 break; 6307 } 6308 } 6309 6310 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6311 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6312 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6313 if (le_device_db_index >= le_device_db_max_count()) return; 6314 uint8_t offset = le_device_db_index >> 3; 6315 uint8_t mask = 1 << (le_device_db_index & 7); 6316 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6317 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6318 // note: go back to remove entries, otherwise, a remove + add will skip the add 6319 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6320 } 6321 } 6322 6323 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6324 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6325 if (le_device_db_index >= le_device_db_max_count()) return; 6326 uint8_t offset = le_device_db_index >> 3; 6327 uint8_t mask = 1 << (le_device_db_index & 7); 6328 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6329 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6330 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6331 } 6332 } 6333 6334 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6335 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6336 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6337 } 6338 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6339 // restart le resolving list update 6340 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6341 } 6342 return ERROR_CODE_SUCCESS; 6343 } 6344 #endif 6345 6346 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6347 void hci_setup_test_connections_fuzz(void){ 6348 hci_connection_t * conn; 6349 6350 // default address: 66:55:44:33:00:01 6351 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6352 6353 // setup Controller info 6354 hci_stack->num_cmd_packets = 255; 6355 hci_stack->acl_packets_total_num = 255; 6356 6357 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6358 addr[5] = 0x01; 6359 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6360 conn->con_handle = addr[5]; 6361 conn->role = HCI_ROLE_SLAVE; 6362 conn->state = RECEIVED_CONNECTION_REQUEST; 6363 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6364 6365 // setup incoming Classic SCO connection with con handle 0x0002 6366 addr[5] = 0x02; 6367 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6368 conn->con_handle = addr[5]; 6369 conn->role = HCI_ROLE_SLAVE; 6370 conn->state = RECEIVED_CONNECTION_REQUEST; 6371 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6372 6373 // setup ready Classic ACL connection with con handle 0x0003 6374 addr[5] = 0x03; 6375 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6376 conn->con_handle = addr[5]; 6377 conn->role = HCI_ROLE_SLAVE; 6378 conn->state = OPEN; 6379 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6380 6381 // setup ready Classic SCO connection with con handle 0x0004 6382 addr[5] = 0x04; 6383 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6384 conn->con_handle = addr[5]; 6385 conn->role = HCI_ROLE_SLAVE; 6386 conn->state = OPEN; 6387 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6388 6389 // setup ready LE ACL connection with con handle 0x005 and public address 6390 addr[5] = 0x05; 6391 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6392 conn->con_handle = addr[5]; 6393 conn->role = HCI_ROLE_SLAVE; 6394 conn->state = OPEN; 6395 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6396 } 6397 6398 void hci_free_connections_fuzz(void){ 6399 btstack_linked_list_iterator_t it; 6400 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6401 while (btstack_linked_list_iterator_has_next(&it)){ 6402 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6403 btstack_linked_list_iterator_remove(&it); 6404 btstack_memory_hci_connection_free(con); 6405 } 6406 } 6407 void hci_simulate_working_fuzz(void){ 6408 hci_init_done(); 6409 hci_stack->num_cmd_packets = 255; 6410 } 6411 #endif 6412