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