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 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2134 break; 2135 #ifdef ENABLE_CLASSIC 2136 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2137 if (packet[5]) return; 2138 hci_stack->synchronous_flow_control_enabled = 1; 2139 break; 2140 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2141 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2142 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2143 conn = hci_connection_for_handle(handle); 2144 if (conn != NULL) { 2145 uint8_t key_size = 0; 2146 if (status == 0){ 2147 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2148 log_info("Handle %04x key Size: %u", handle, key_size); 2149 } else { 2150 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2151 } 2152 hci_handle_read_encryption_key_size_complete(conn, key_size); 2153 } 2154 break; 2155 #endif 2156 default: 2157 break; 2158 } 2159 } 2160 2161 #ifdef ENABLE_BLE 2162 static void event_handle_le_connection_complete(const uint8_t * packet){ 2163 bd_addr_t addr; 2164 bd_addr_type_t addr_type; 2165 hci_connection_t * conn; 2166 2167 // Connection management 2168 reverse_bd_addr(&packet[8], addr); 2169 addr_type = (bd_addr_type_t)packet[7]; 2170 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2171 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2172 2173 #ifdef ENABLE_LE_CENTRAL 2174 // handle error: error is reported only to the initiator -> outgoing connection 2175 if (packet[3]){ 2176 2177 // handle cancelled outgoing connection 2178 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2179 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2180 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2181 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2182 // whitelist connect 2183 if (hci_is_le_connection_type(addr_type)){ 2184 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2185 } 2186 // get outgoing connection conn struct for direct connect 2187 conn = gap_get_outgoing_connection(); 2188 } 2189 2190 // outgoing le connection establishment is done 2191 if (conn){ 2192 // remove entry 2193 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2194 btstack_memory_hci_connection_free( conn ); 2195 } 2196 return; 2197 } 2198 #endif 2199 2200 // on success, both hosts receive connection complete event 2201 if (packet[6] == HCI_ROLE_MASTER){ 2202 #ifdef ENABLE_LE_CENTRAL 2203 // if we're master on an le connection, it was an outgoing connection and we're done with it 2204 // note: no hci_connection_t object exists yet for connect with whitelist 2205 if (hci_is_le_connection_type(addr_type)){ 2206 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2207 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2208 } 2209 #endif 2210 } else { 2211 #ifdef ENABLE_LE_PERIPHERAL 2212 // if we're slave, it was an incoming connection, advertisements have stopped 2213 hci_stack->le_advertisements_active = false; 2214 #endif 2215 } 2216 2217 // LE connections are auto-accepted, so just create a connection if there isn't one already 2218 if (!conn){ 2219 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2220 } 2221 2222 // no memory, sorry. 2223 if (!conn){ 2224 return; 2225 } 2226 2227 conn->state = OPEN; 2228 conn->role = packet[6]; 2229 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2230 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2231 2232 #ifdef ENABLE_LE_PERIPHERAL 2233 if (packet[6] == HCI_ROLE_SLAVE){ 2234 hci_update_advertisements_enabled_for_current_roles(); 2235 } 2236 #endif 2237 2238 // init unenhanced att bearer mtu 2239 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2240 conn->att_connection.mtu_exchanged = false; 2241 2242 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2243 2244 // restart timer 2245 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2246 // btstack_run_loop_add_timer(&conn->timeout); 2247 2248 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2249 2250 hci_emit_nr_connections_changed(); 2251 } 2252 #endif 2253 2254 static void event_handler(uint8_t *packet, uint16_t size){ 2255 2256 uint16_t event_length = packet[1]; 2257 2258 // assert packet is complete 2259 if (size != (event_length + 2u)){ 2260 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2261 return; 2262 } 2263 2264 bd_addr_type_t addr_type; 2265 hci_con_handle_t handle; 2266 hci_connection_t * conn; 2267 int i; 2268 int create_connection_cmd; 2269 2270 #ifdef ENABLE_CLASSIC 2271 hci_link_type_t link_type; 2272 bd_addr_t addr; 2273 #endif 2274 2275 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2276 2277 switch (hci_event_packet_get_type(packet)) { 2278 2279 case HCI_EVENT_COMMAND_COMPLETE: 2280 handle_command_complete_event(packet, size); 2281 break; 2282 2283 case HCI_EVENT_COMMAND_STATUS: 2284 // get num cmd packets - limit to 1 to reduce complexity 2285 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2286 2287 // check command status to detected failed outgoing connections 2288 create_connection_cmd = 0; 2289 #ifdef ENABLE_CLASSIC 2290 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2291 create_connection_cmd = 1; 2292 } 2293 #endif 2294 #ifdef ENABLE_LE_CENTRAL 2295 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2296 create_connection_cmd = 1; 2297 } 2298 #endif 2299 if (create_connection_cmd) { 2300 uint8_t status = hci_event_command_status_get_status(packet); 2301 addr_type = hci_stack->outgoing_addr_type; 2302 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2303 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); 2304 2305 // reset outgoing address info 2306 memset(hci_stack->outgoing_addr, 0, 6); 2307 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2308 2309 // on error 2310 if (status != ERROR_CODE_SUCCESS){ 2311 #ifdef ENABLE_LE_CENTRAL 2312 if (hci_is_le_connection_type(addr_type)){ 2313 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2314 } 2315 #endif 2316 // error => outgoing connection failed 2317 if (conn != NULL){ 2318 hci_handle_connection_failed(conn, status); 2319 } 2320 } 2321 } 2322 break; 2323 2324 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2325 if (size < 3) return; 2326 uint16_t num_handles = packet[2]; 2327 if (size != (3u + num_handles * 4u)) return; 2328 uint16_t offset = 3; 2329 for (i=0; i<num_handles;i++){ 2330 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2331 offset += 2u; 2332 uint16_t num_packets = little_endian_read_16(packet, offset); 2333 offset += 2u; 2334 2335 conn = hci_connection_for_handle(handle); 2336 if (!conn){ 2337 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2338 continue; 2339 } 2340 2341 if (conn->num_packets_sent >= num_packets){ 2342 conn->num_packets_sent -= num_packets; 2343 } else { 2344 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2345 conn->num_packets_sent = 0; 2346 } 2347 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2348 2349 #ifdef ENABLE_CLASSIC 2350 // For SCO, we do the can_send_now_check here 2351 hci_notify_if_sco_can_send_now(); 2352 #endif 2353 } 2354 break; 2355 } 2356 2357 #ifdef ENABLE_CLASSIC 2358 case HCI_EVENT_INQUIRY_COMPLETE: 2359 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2360 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2361 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2362 hci_emit_event(event, sizeof(event), 1); 2363 } 2364 break; 2365 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2366 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2367 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2368 } 2369 break; 2370 case HCI_EVENT_CONNECTION_REQUEST: 2371 reverse_bd_addr(&packet[2], addr); 2372 link_type = (hci_link_type_t) packet[11]; 2373 if (hci_stack->gap_classic_accept_callback != NULL){ 2374 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2375 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2376 bd_addr_copy(hci_stack->decline_addr, addr); 2377 break; 2378 } 2379 } 2380 2381 // TODO: eval COD 8-10 2382 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2383 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2384 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2385 if (!conn) { 2386 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2387 } 2388 if (!conn) { 2389 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2390 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2391 bd_addr_copy(hci_stack->decline_addr, addr); 2392 break; 2393 } 2394 conn->role = HCI_ROLE_SLAVE; 2395 conn->state = RECEIVED_CONNECTION_REQUEST; 2396 // store info about eSCO 2397 if (link_type == HCI_LINK_TYPE_ESCO){ 2398 conn->remote_supported_features[0] |= 1; 2399 } 2400 hci_run(); 2401 break; 2402 2403 case HCI_EVENT_CONNECTION_COMPLETE: 2404 // Connection management 2405 reverse_bd_addr(&packet[5], addr); 2406 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2407 addr_type = BD_ADDR_TYPE_ACL; 2408 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2409 if (conn) { 2410 if (!packet[2]){ 2411 conn->state = OPEN; 2412 conn->con_handle = little_endian_read_16(packet, 3); 2413 2414 // queue get remote feature 2415 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2416 2417 // queue set supervision timeout if we're master 2418 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2419 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2420 } 2421 2422 // restart timer 2423 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2424 btstack_run_loop_add_timer(&conn->timeout); 2425 2426 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2427 2428 hci_emit_nr_connections_changed(); 2429 } else { 2430 // connection failed 2431 hci_handle_connection_failed(conn, packet[2]); 2432 } 2433 } 2434 break; 2435 2436 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2437 reverse_bd_addr(&packet[5], addr); 2438 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2439 if (packet[2]){ 2440 // connection failed 2441 break; 2442 } 2443 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2444 if (!conn) { 2445 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2446 } 2447 if (!conn) { 2448 break; 2449 } 2450 conn->state = OPEN; 2451 conn->con_handle = little_endian_read_16(packet, 3); 2452 2453 #ifdef ENABLE_SCO_OVER_HCI 2454 // update SCO 2455 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2456 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2457 } 2458 // trigger can send now 2459 if (hci_have_usb_transport()){ 2460 hci_stack->sco_can_send_now = 1; 2461 } 2462 #endif 2463 break; 2464 2465 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2466 handle = little_endian_read_16(packet, 3); 2467 conn = hci_connection_for_handle(handle); 2468 if (!conn) break; 2469 if (!packet[2]){ 2470 const uint8_t * features = &packet[5]; 2471 hci_handle_remote_features_page_0(conn, features); 2472 2473 // read extended features if possible 2474 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2475 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2476 break; 2477 } 2478 } 2479 hci_handle_remote_features_received(conn); 2480 break; 2481 2482 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2483 handle = little_endian_read_16(packet, 3); 2484 conn = hci_connection_for_handle(handle); 2485 if (!conn) break; 2486 // status = ok, page = 1 2487 if (!packet[2]) { 2488 uint8_t page_number = packet[5]; 2489 uint8_t maximum_page_number = packet[6]; 2490 const uint8_t * features = &packet[7]; 2491 bool done = false; 2492 switch (page_number){ 2493 case 1: 2494 hci_handle_remote_features_page_1(conn, features); 2495 if (maximum_page_number >= 2){ 2496 // get Secure Connections (Controller) from Page 2 if available 2497 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2498 } else { 2499 // otherwise, assume SC (Controller) == SC (Host) 2500 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2501 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2502 } 2503 done = true; 2504 } 2505 break; 2506 case 2: 2507 hci_handle_remote_features_page_2(conn, features); 2508 done = true; 2509 break; 2510 default: 2511 break; 2512 } 2513 if (!done) break; 2514 } 2515 hci_handle_remote_features_received(conn); 2516 break; 2517 2518 case HCI_EVENT_LINK_KEY_REQUEST: 2519 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2520 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2521 // request handled by hci_run() 2522 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2523 break; 2524 2525 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2526 reverse_bd_addr(&packet[2], addr); 2527 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2528 if (!conn) break; 2529 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2530 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2531 // Change Connection Encryption keeps link key type 2532 if (link_key_type != CHANGED_COMBINATION_KEY){ 2533 conn->link_key_type = link_key_type; 2534 } 2535 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2536 // still forward event to allow dismiss of pairing dialog 2537 break; 2538 } 2539 2540 case HCI_EVENT_PIN_CODE_REQUEST: 2541 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2542 // non-bondable mode: pin code negative reply will be sent 2543 if (!hci_stack->bondable){ 2544 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2545 hci_run(); 2546 return; 2547 } 2548 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2549 if (!hci_stack->link_key_db) break; 2550 hci_event_pin_code_request_get_bd_addr(packet, addr); 2551 hci_stack->link_key_db->delete_link_key(addr); 2552 break; 2553 2554 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2555 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2556 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2557 break; 2558 2559 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2560 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2561 if (!hci_stack->ssp_auto_accept) break; 2562 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2563 break; 2564 2565 case HCI_EVENT_USER_PASSKEY_REQUEST: 2566 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2567 if (!hci_stack->ssp_auto_accept) break; 2568 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2569 break; 2570 case HCI_EVENT_MODE_CHANGE: 2571 handle = hci_event_mode_change_get_handle(packet); 2572 conn = hci_connection_for_handle(handle); 2573 if (!conn) break; 2574 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2575 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2576 break; 2577 #endif 2578 2579 case HCI_EVENT_ENCRYPTION_CHANGE: 2580 handle = hci_event_encryption_change_get_connection_handle(packet); 2581 conn = hci_connection_for_handle(handle); 2582 if (!conn) break; 2583 if (hci_event_encryption_change_get_status(packet) == 0u) { 2584 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2585 if (encryption_enabled){ 2586 if (hci_is_le_connection(conn)){ 2587 // For LE, we accept connection as encrypted 2588 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2589 } 2590 #ifdef ENABLE_CLASSIC 2591 else { 2592 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2593 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2594 bool connected_uses_aes_ccm = encryption_enabled == 2; 2595 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2596 log_info("SC during pairing, but only E0 now -> abort"); 2597 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2598 break; 2599 } 2600 2601 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2602 if (connected_uses_aes_ccm){ 2603 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2604 } 2605 2606 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2607 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2608 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2609 } else { 2610 // if not, pretend everything is perfect 2611 hci_handle_read_encryption_key_size_complete(conn, 16); 2612 } 2613 } 2614 #endif 2615 } else { 2616 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2617 } 2618 } 2619 2620 break; 2621 2622 #ifdef ENABLE_CLASSIC 2623 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2624 handle = hci_event_authentication_complete_get_connection_handle(packet); 2625 conn = hci_connection_for_handle(handle); 2626 if (!conn) break; 2627 2628 // ignore authentication event if we didn't request it 2629 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2630 2631 // dedicated bonding: send result and disconnect 2632 if (conn->bonding_flags & BONDING_DEDICATED){ 2633 conn->bonding_flags &= ~BONDING_DEDICATED; 2634 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2635 conn->bonding_status = packet[2]; 2636 break; 2637 } 2638 2639 // authenticated only if auth status == 0 2640 if (hci_event_authentication_complete_get_status(packet) == 0){ 2641 // authenticated 2642 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2643 2644 // If link key sufficient for requested security and not already encrypted, start encryption 2645 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2646 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2647 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2648 break; 2649 } 2650 } 2651 2652 // emit updated security level 2653 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2654 break; 2655 #endif 2656 2657 // HCI_EVENT_DISCONNECTION_COMPLETE 2658 // has been split, to first notify stack before shutting connection down 2659 // see end of function, too. 2660 case HCI_EVENT_DISCONNECTION_COMPLETE: 2661 if (packet[2]) break; // status != 0 2662 handle = little_endian_read_16(packet, 3); 2663 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2664 if (hci_stack->acl_fragmentation_total_size > 0u) { 2665 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2666 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2667 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2668 hci_stack->acl_fragmentation_total_size = 0; 2669 hci_stack->acl_fragmentation_pos = 0; 2670 if (release_buffer){ 2671 hci_release_packet_buffer(); 2672 } 2673 } 2674 } 2675 2676 conn = hci_connection_for_handle(handle); 2677 if (!conn) break; 2678 // mark connection for shutdown 2679 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2680 2681 // emit dedicatd bonding event 2682 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2683 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2684 } 2685 2686 #ifdef ENABLE_BLE 2687 #ifdef ENABLE_LE_PERIPHERAL 2688 // re-enable advertisements for le connections if active 2689 if (hci_is_le_connection(conn)){ 2690 hci_update_advertisements_enabled_for_current_roles(); 2691 } 2692 #endif 2693 #endif 2694 break; 2695 2696 case HCI_EVENT_HARDWARE_ERROR: 2697 log_error("Hardware Error: 0x%02x", packet[2]); 2698 if (hci_stack->hardware_error_callback){ 2699 (*hci_stack->hardware_error_callback)(packet[2]); 2700 } else { 2701 // if no special requests, just reboot stack 2702 hci_power_control_off(); 2703 hci_power_control_on(); 2704 } 2705 break; 2706 2707 #ifdef ENABLE_CLASSIC 2708 case HCI_EVENT_ROLE_CHANGE: 2709 if (packet[2]) break; // status != 0 2710 reverse_bd_addr(&packet[3], addr); 2711 addr_type = BD_ADDR_TYPE_ACL; 2712 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2713 if (!conn) break; 2714 conn->role = packet[9]; 2715 break; 2716 #endif 2717 2718 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2719 // release packet buffer only for asynchronous transport and if there are not further fragements 2720 if (hci_transport_synchronous()) { 2721 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2722 return; // instead of break: to avoid re-entering hci_run() 2723 } 2724 hci_stack->acl_fragmentation_tx_active = 0; 2725 if (hci_stack->acl_fragmentation_total_size) break; 2726 hci_release_packet_buffer(); 2727 2728 // L2CAP receives this event via the hci_emit_event below 2729 2730 #ifdef ENABLE_CLASSIC 2731 // For SCO, we do the can_send_now_check here 2732 hci_notify_if_sco_can_send_now(); 2733 #endif 2734 break; 2735 2736 #ifdef ENABLE_CLASSIC 2737 case HCI_EVENT_SCO_CAN_SEND_NOW: 2738 // For SCO, we do the can_send_now_check here 2739 hci_stack->sco_can_send_now = 1; 2740 hci_notify_if_sco_can_send_now(); 2741 return; 2742 2743 // explode inquriy results for easier consumption 2744 case HCI_EVENT_INQUIRY_RESULT: 2745 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2746 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2747 gap_inquiry_explode(packet, size); 2748 break; 2749 #endif 2750 2751 #ifdef ENABLE_BLE 2752 case HCI_EVENT_LE_META: 2753 switch (packet[2]){ 2754 #ifdef ENABLE_LE_CENTRAL 2755 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2756 // log_info("advertising report received"); 2757 if (!hci_stack->le_scanning_enabled) break; 2758 le_handle_advertisement_report(packet, size); 2759 break; 2760 #endif 2761 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2762 event_handle_le_connection_complete(packet); 2763 break; 2764 2765 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2766 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2767 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2768 conn = hci_connection_for_handle(handle); 2769 if (!conn) break; 2770 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2771 break; 2772 2773 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2774 // connection 2775 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2776 conn = hci_connection_for_handle(handle); 2777 if (conn) { 2778 // read arguments 2779 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2780 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2781 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2782 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2783 2784 // validate against current connection parameter range 2785 le_connection_parameter_range_t existing_range; 2786 gap_get_connection_parameter_range(&existing_range); 2787 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2788 if (update_parameter){ 2789 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2790 conn->le_conn_interval_min = le_conn_interval_min; 2791 conn->le_conn_interval_max = le_conn_interval_max; 2792 conn->le_conn_latency = le_conn_latency; 2793 conn->le_supervision_timeout = le_supervision_timeout; 2794 } else { 2795 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2796 } 2797 } 2798 break; 2799 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2800 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2801 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2802 conn = hci_connection_for_handle(handle); 2803 if (conn) { 2804 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2805 } 2806 break; 2807 #endif 2808 default: 2809 break; 2810 } 2811 break; 2812 #endif 2813 case HCI_EVENT_VENDOR_SPECIFIC: 2814 // Vendor specific commands often create vendor specific event instead of num completed packets 2815 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2816 switch (hci_stack->manufacturer){ 2817 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2818 hci_stack->num_cmd_packets = 1; 2819 break; 2820 default: 2821 break; 2822 } 2823 break; 2824 default: 2825 break; 2826 } 2827 2828 handle_event_for_current_stack_state(packet, size); 2829 2830 // notify upper stack 2831 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2832 2833 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2834 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2835 handle = little_endian_read_16(packet, 3); 2836 hci_connection_t * aConn = hci_connection_for_handle(handle); 2837 // discard connection if app did not trigger a reconnect in the event handler 2838 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2839 hci_shutdown_connection(aConn); 2840 } 2841 } 2842 2843 // execute main loop 2844 hci_run(); 2845 } 2846 2847 #ifdef ENABLE_CLASSIC 2848 2849 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2850 static void sco_schedule_tx(hci_connection_t * conn); 2851 2852 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2853 log_debug("SCO TX Timeout"); 2854 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2855 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2856 if (!conn) return; 2857 2858 // trigger send 2859 conn->sco_tx_ready = 1; 2860 // extra packet if CVSD but SCO buffer is too short 2861 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2862 conn->sco_tx_ready++; 2863 } 2864 hci_notify_if_sco_can_send_now(); 2865 } 2866 2867 2868 #define SCO_TX_AFTER_RX_MS (6) 2869 2870 static void sco_schedule_tx(hci_connection_t * conn){ 2871 2872 uint32_t now = btstack_run_loop_get_time_ms(); 2873 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2874 int time_delta_ms = sco_tx_ms - now; 2875 2876 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2877 2878 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2879 btstack_run_loop_set_timer(timer, time_delta_ms); 2880 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2881 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2882 btstack_run_loop_add_timer(timer); 2883 } 2884 2885 static void sco_handler(uint8_t * packet, uint16_t size){ 2886 // lookup connection struct 2887 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2888 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2889 if (!conn) return; 2890 2891 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2892 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2893 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2894 packet[2] = 0x3c; 2895 memmove(&packet[3], &packet[23], 63); 2896 size = 63; 2897 } 2898 } 2899 2900 if (hci_have_usb_transport()){ 2901 // Nothing to do 2902 } else { 2903 // 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); 2904 if (hci_stack->synchronous_flow_control_enabled == 0){ 2905 uint32_t now = btstack_run_loop_get_time_ms(); 2906 2907 if (!conn->sco_rx_valid){ 2908 // ignore first 10 packets 2909 conn->sco_rx_count++; 2910 // log_debug("sco rx count %u", conn->sco_rx_count); 2911 if (conn->sco_rx_count == 10) { 2912 // use first timestamp as is and pretent it just started 2913 conn->sco_rx_ms = now; 2914 conn->sco_rx_valid = 1; 2915 conn->sco_rx_count = 0; 2916 sco_schedule_tx(conn); 2917 } 2918 } else { 2919 // track expected arrival timme 2920 conn->sco_rx_count++; 2921 conn->sco_rx_ms += 7; 2922 int delta = (int32_t) (now - conn->sco_rx_ms); 2923 if (delta > 0){ 2924 conn->sco_rx_ms++; 2925 } 2926 // log_debug("sco rx %u", conn->sco_rx_ms); 2927 sco_schedule_tx(conn); 2928 } 2929 } 2930 } 2931 // deliver to app 2932 if (hci_stack->sco_packet_handler) { 2933 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2934 } 2935 2936 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2937 conn->num_packets_completed++; 2938 hci_stack->host_completed_packets = 1; 2939 hci_run(); 2940 #endif 2941 } 2942 #endif 2943 2944 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2945 hci_dump_packet(packet_type, 1, packet, size); 2946 switch (packet_type) { 2947 case HCI_EVENT_PACKET: 2948 event_handler(packet, size); 2949 break; 2950 case HCI_ACL_DATA_PACKET: 2951 acl_handler(packet, size); 2952 break; 2953 #ifdef ENABLE_CLASSIC 2954 case HCI_SCO_DATA_PACKET: 2955 sco_handler(packet, size); 2956 break; 2957 #endif 2958 default: 2959 break; 2960 } 2961 } 2962 2963 /** 2964 * @brief Add event packet handler. 2965 */ 2966 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2967 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2968 } 2969 2970 2971 /** Register HCI packet handlers */ 2972 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2973 hci_stack->acl_packet_handler = handler; 2974 } 2975 2976 #ifdef ENABLE_CLASSIC 2977 /** 2978 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2979 */ 2980 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2981 hci_stack->sco_packet_handler = handler; 2982 } 2983 #endif 2984 2985 static void hci_state_reset(void){ 2986 // no connections yet 2987 hci_stack->connections = NULL; 2988 2989 // keep discoverable/connectable as this has been requested by the client(s) 2990 // hci_stack->discoverable = 0; 2991 // hci_stack->connectable = 0; 2992 // hci_stack->bondable = 1; 2993 // hci_stack->own_addr_type = 0; 2994 2995 // buffer is free 2996 hci_stack->hci_packet_buffer_reserved = 0; 2997 2998 // no pending cmds 2999 hci_stack->decline_reason = 0; 3000 hci_stack->new_scan_enable_value = 0xff; 3001 3002 hci_stack->secure_connections_active = false; 3003 3004 // LE 3005 #ifdef ENABLE_BLE 3006 memset(hci_stack->le_random_address, 0, 6); 3007 hci_stack->le_random_address_set = 0; 3008 #endif 3009 #ifdef ENABLE_LE_CENTRAL 3010 hci_stack->le_scanning_active = 0; 3011 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3012 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3013 hci_stack->le_whitelist_capacity = 0; 3014 #endif 3015 } 3016 3017 #ifdef ENABLE_CLASSIC 3018 /** 3019 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3020 */ 3021 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3022 // store and open remote device db 3023 hci_stack->link_key_db = link_key_db; 3024 if (hci_stack->link_key_db) { 3025 hci_stack->link_key_db->open(); 3026 } 3027 } 3028 #endif 3029 3030 void hci_init(const hci_transport_t *transport, const void *config){ 3031 3032 #ifdef HAVE_MALLOC 3033 if (!hci_stack) { 3034 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3035 } 3036 #else 3037 hci_stack = &hci_stack_static; 3038 #endif 3039 memset(hci_stack, 0, sizeof(hci_stack_t)); 3040 3041 // reference to use transport layer implementation 3042 hci_stack->hci_transport = transport; 3043 3044 // reference to used config 3045 hci_stack->config = config; 3046 3047 // setup pointer for outgoing packet buffer 3048 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3049 3050 // max acl payload size defined in config.h 3051 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3052 3053 // register packet handlers with transport 3054 transport->register_packet_handler(&packet_handler); 3055 3056 hci_stack->state = HCI_STATE_OFF; 3057 3058 // class of device 3059 hci_stack->class_of_device = 0x007a020c; // Smartphone 3060 3061 // bondable by default 3062 hci_stack->bondable = 1; 3063 3064 #ifdef ENABLE_CLASSIC 3065 // classic name 3066 hci_stack->local_name = default_classic_name; 3067 3068 // Master slave policy 3069 hci_stack->master_slave_policy = 1; 3070 3071 // Allow Role Switch 3072 hci_stack->allow_role_switch = 1; 3073 3074 // Default / minimum security level = 2 3075 hci_stack->gap_security_level = LEVEL_2; 3076 3077 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3078 hci_stack->gap_required_encyrption_key_size = 7; 3079 #endif 3080 3081 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3082 hci_stack->ssp_enable = 1; 3083 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3084 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3085 hci_stack->ssp_auto_accept = 1; 3086 3087 // Secure Connections: enable (requires support from Controller) 3088 hci_stack->secure_connections_enable = true; 3089 3090 // voice setting - signed 16 bit pcm data with CVSD over the air 3091 hci_stack->sco_voice_setting = 0x60; 3092 3093 #ifdef ENABLE_LE_CENTRAL 3094 // connection parameter to use for outgoing connections 3095 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3096 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3097 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3098 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3099 hci_stack->le_connection_latency = 4; // 4 3100 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3101 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3102 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3103 3104 // default LE Scanning 3105 hci_stack->le_scan_type = 0x1; // active 3106 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3107 hci_stack->le_scan_window = 0x30; // 30 ms 3108 #endif 3109 3110 #ifdef ENABLE_LE_PERIPHERAL 3111 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3112 #endif 3113 3114 // connection parameter range used to answer connection parameter update requests in l2cap 3115 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3116 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3117 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3118 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3119 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3120 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3121 3122 hci_state_reset(); 3123 } 3124 3125 void hci_deinit(void){ 3126 #ifdef HAVE_MALLOC 3127 if (hci_stack) { 3128 free(hci_stack); 3129 } 3130 #endif 3131 hci_stack = NULL; 3132 3133 #ifdef ENABLE_CLASSIC 3134 disable_l2cap_timeouts = 0; 3135 #endif 3136 } 3137 3138 /** 3139 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3140 */ 3141 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3142 hci_stack->chipset = chipset_driver; 3143 3144 // reset chipset driver - init is also called on power_up 3145 if (hci_stack->chipset && hci_stack->chipset->init){ 3146 hci_stack->chipset->init(hci_stack->config); 3147 } 3148 } 3149 3150 /** 3151 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3152 */ 3153 void hci_set_control(const btstack_control_t *hardware_control){ 3154 // references to used control implementation 3155 hci_stack->control = hardware_control; 3156 // init with transport config 3157 hardware_control->init(hci_stack->config); 3158 } 3159 3160 void hci_close(void){ 3161 // close remote device db 3162 if (hci_stack->link_key_db) { 3163 hci_stack->link_key_db->close(); 3164 } 3165 3166 btstack_linked_list_iterator_t lit; 3167 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3168 while (btstack_linked_list_iterator_has_next(&lit)){ 3169 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3170 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3171 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3172 hci_shutdown_connection(connection); 3173 } 3174 3175 hci_power_control(HCI_POWER_OFF); 3176 3177 #ifdef HAVE_MALLOC 3178 free(hci_stack); 3179 #endif 3180 hci_stack = NULL; 3181 } 3182 3183 #ifdef ENABLE_CLASSIC 3184 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3185 // validate ranage and set 3186 if (encryption_key_size < 7) return; 3187 if (encryption_key_size > 16) return; 3188 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3189 } 3190 3191 void gap_set_security_level(gap_security_level_t security_level){ 3192 hci_stack->gap_security_level = security_level; 3193 } 3194 3195 gap_security_level_t gap_get_security_level(void){ 3196 return hci_stack->gap_security_level; 3197 } 3198 #endif 3199 3200 #ifdef ENABLE_CLASSIC 3201 void gap_set_class_of_device(uint32_t class_of_device){ 3202 hci_stack->class_of_device = class_of_device; 3203 } 3204 3205 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3206 hci_stack->default_link_policy_settings = default_link_policy_settings; 3207 } 3208 3209 void gap_set_allow_role_switch(bool allow_role_switch){ 3210 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3211 } 3212 3213 uint8_t hci_get_allow_role_switch(void){ 3214 return hci_stack->allow_role_switch; 3215 } 3216 3217 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3218 hci_stack->link_supervision_timeout = link_supervision_timeout; 3219 } 3220 3221 void hci_disable_l2cap_timeout_check(void){ 3222 disable_l2cap_timeouts = 1; 3223 } 3224 #endif 3225 3226 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3227 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3228 void hci_set_bd_addr(bd_addr_t addr){ 3229 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3230 hci_stack->custom_bd_addr_set = 1; 3231 } 3232 #endif 3233 3234 // State-Module-Driver overview 3235 // state module low-level 3236 // HCI_STATE_OFF off close 3237 // HCI_STATE_INITIALIZING, on open 3238 // HCI_STATE_WORKING, on open 3239 // HCI_STATE_HALTING, on open 3240 // HCI_STATE_SLEEPING, off/sleep close 3241 // HCI_STATE_FALLING_ASLEEP on open 3242 3243 static int hci_power_control_on(void){ 3244 3245 // power on 3246 int err = 0; 3247 if (hci_stack->control && hci_stack->control->on){ 3248 err = (*hci_stack->control->on)(); 3249 } 3250 if (err){ 3251 log_error( "POWER_ON failed"); 3252 hci_emit_hci_open_failed(); 3253 return err; 3254 } 3255 3256 // int chipset driver 3257 if (hci_stack->chipset && hci_stack->chipset->init){ 3258 hci_stack->chipset->init(hci_stack->config); 3259 } 3260 3261 // init transport 3262 if (hci_stack->hci_transport->init){ 3263 hci_stack->hci_transport->init(hci_stack->config); 3264 } 3265 3266 // open transport 3267 err = hci_stack->hci_transport->open(); 3268 if (err){ 3269 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3270 if (hci_stack->control && hci_stack->control->off){ 3271 (*hci_stack->control->off)(); 3272 } 3273 hci_emit_hci_open_failed(); 3274 return err; 3275 } 3276 return 0; 3277 } 3278 3279 static void hci_power_control_off(void){ 3280 3281 log_info("hci_power_control_off"); 3282 3283 // close low-level device 3284 hci_stack->hci_transport->close(); 3285 3286 log_info("hci_power_control_off - hci_transport closed"); 3287 3288 // power off 3289 if (hci_stack->control && hci_stack->control->off){ 3290 (*hci_stack->control->off)(); 3291 } 3292 3293 log_info("hci_power_control_off - control closed"); 3294 3295 hci_stack->state = HCI_STATE_OFF; 3296 } 3297 3298 static void hci_power_control_sleep(void){ 3299 3300 log_info("hci_power_control_sleep"); 3301 3302 #if 0 3303 // don't close serial port during sleep 3304 3305 // close low-level device 3306 hci_stack->hci_transport->close(hci_stack->config); 3307 #endif 3308 3309 // sleep mode 3310 if (hci_stack->control && hci_stack->control->sleep){ 3311 (*hci_stack->control->sleep)(); 3312 } 3313 3314 hci_stack->state = HCI_STATE_SLEEPING; 3315 } 3316 3317 static int hci_power_control_wake(void){ 3318 3319 log_info("hci_power_control_wake"); 3320 3321 // wake on 3322 if (hci_stack->control && hci_stack->control->wake){ 3323 (*hci_stack->control->wake)(); 3324 } 3325 3326 #if 0 3327 // open low-level device 3328 int err = hci_stack->hci_transport->open(hci_stack->config); 3329 if (err){ 3330 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3331 if (hci_stack->control && hci_stack->control->off){ 3332 (*hci_stack->control->off)(); 3333 } 3334 hci_emit_hci_open_failed(); 3335 return err; 3336 } 3337 #endif 3338 3339 return 0; 3340 } 3341 3342 static void hci_power_transition_to_initializing(void){ 3343 // set up state machine 3344 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3345 hci_stack->hci_packet_buffer_reserved = 0; 3346 hci_stack->state = HCI_STATE_INITIALIZING; 3347 hci_stack->substate = HCI_INIT_SEND_RESET; 3348 } 3349 3350 // returns error 3351 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3352 int err; 3353 switch (power_mode){ 3354 case HCI_POWER_ON: 3355 err = hci_power_control_on(); 3356 if (err != 0) { 3357 log_error("hci_power_control_on() error %d", err); 3358 return err; 3359 } 3360 hci_power_transition_to_initializing(); 3361 break; 3362 case HCI_POWER_OFF: 3363 // do nothing 3364 break; 3365 case HCI_POWER_SLEEP: 3366 // do nothing (with SLEEP == OFF) 3367 break; 3368 default: 3369 btstack_assert(false); 3370 break; 3371 } 3372 return ERROR_CODE_SUCCESS; 3373 } 3374 3375 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3376 switch (power_mode){ 3377 case HCI_POWER_ON: 3378 // do nothing 3379 break; 3380 case HCI_POWER_OFF: 3381 // no connections yet, just turn it off 3382 hci_power_control_off(); 3383 break; 3384 case HCI_POWER_SLEEP: 3385 // no connections yet, just turn it off 3386 hci_power_control_sleep(); 3387 break; 3388 default: 3389 btstack_assert(false); 3390 break; 3391 } 3392 return ERROR_CODE_SUCCESS; 3393 } 3394 3395 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3396 switch (power_mode){ 3397 case HCI_POWER_ON: 3398 // do nothing 3399 break; 3400 case HCI_POWER_OFF: 3401 // see hci_run 3402 hci_stack->state = HCI_STATE_HALTING; 3403 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3404 break; 3405 case HCI_POWER_SLEEP: 3406 // see hci_run 3407 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3408 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3409 break; 3410 default: 3411 btstack_assert(false); 3412 break; 3413 } 3414 return ERROR_CODE_SUCCESS; 3415 } 3416 3417 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3418 switch (power_mode){ 3419 case HCI_POWER_ON: 3420 hci_power_transition_to_initializing(); 3421 break; 3422 case HCI_POWER_OFF: 3423 // do nothing 3424 break; 3425 case HCI_POWER_SLEEP: 3426 // see hci_run 3427 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3428 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3429 break; 3430 default: 3431 btstack_assert(false); 3432 break; 3433 } 3434 } 3435 3436 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3437 switch (power_mode){ 3438 case HCI_POWER_ON: 3439 3440 #ifdef HAVE_PLATFORM_IPHONE_OS 3441 // nothing to do, if H4 supports power management 3442 if (btstack_control_iphone_power_management_enabled()){ 3443 hci_stack->state = HCI_STATE_INITIALIZING; 3444 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3445 break; 3446 } 3447 #endif 3448 hci_power_transition_to_initializing(); 3449 break; 3450 case HCI_POWER_OFF: 3451 // see hci_run 3452 hci_stack->state = HCI_STATE_HALTING; 3453 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3454 break; 3455 case HCI_POWER_SLEEP: 3456 // do nothing 3457 break; 3458 default: 3459 btstack_assert(false); 3460 break; 3461 } 3462 return ERROR_CODE_SUCCESS; 3463 } 3464 3465 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3466 int err; 3467 switch (power_mode){ 3468 case HCI_POWER_ON: 3469 #ifdef HAVE_PLATFORM_IPHONE_OS 3470 // nothing to do, if H4 supports power management 3471 if (btstack_control_iphone_power_management_enabled()){ 3472 hci_stack->state = HCI_STATE_INITIALIZING; 3473 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3474 hci_update_scan_enable(); 3475 break; 3476 } 3477 #endif 3478 err = hci_power_control_wake(); 3479 if (err) return err; 3480 hci_power_transition_to_initializing(); 3481 break; 3482 case HCI_POWER_OFF: 3483 hci_stack->state = HCI_STATE_HALTING; 3484 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3485 break; 3486 case HCI_POWER_SLEEP: 3487 // do nothing 3488 break; 3489 default: 3490 btstack_assert(false); 3491 break; 3492 } 3493 return ERROR_CODE_SUCCESS; 3494 } 3495 3496 int hci_power_control(HCI_POWER_MODE power_mode){ 3497 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3498 int err; 3499 switch (hci_stack->state){ 3500 case HCI_STATE_OFF: 3501 err = hci_power_control_state_off(power_mode); 3502 break; 3503 case HCI_STATE_INITIALIZING: 3504 err = hci_power_control_state_initializing(power_mode); 3505 break; 3506 case HCI_STATE_WORKING: 3507 err = hci_power_control_state_working(power_mode); 3508 break; 3509 case HCI_STATE_HALTING: 3510 err = hci_power_control_state_halting(power_mode); 3511 break; 3512 case HCI_STATE_FALLING_ASLEEP: 3513 err = hci_power_control_state_falling_asleep(power_mode); 3514 break; 3515 case HCI_STATE_SLEEPING: 3516 err = hci_power_control_state_sleeping(power_mode); 3517 break; 3518 default: 3519 btstack_assert(false); 3520 break; 3521 } 3522 if (err){ 3523 return err; 3524 } 3525 3526 // create internal event 3527 hci_emit_state(); 3528 3529 // trigger next/first action 3530 hci_run(); 3531 3532 return 0; 3533 } 3534 3535 3536 #ifdef ENABLE_CLASSIC 3537 3538 static void hci_update_scan_enable(void){ 3539 // 2 = page scan, 1 = inq scan 3540 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3541 hci_run(); 3542 } 3543 3544 void gap_discoverable_control(uint8_t enable){ 3545 if (enable) enable = 1; // normalize argument 3546 3547 if (hci_stack->discoverable == enable){ 3548 hci_emit_discoverable_enabled(hci_stack->discoverable); 3549 return; 3550 } 3551 3552 hci_stack->discoverable = enable; 3553 hci_update_scan_enable(); 3554 } 3555 3556 void gap_connectable_control(uint8_t enable){ 3557 if (enable) enable = 1; // normalize argument 3558 3559 // don't emit event 3560 if (hci_stack->connectable == enable) return; 3561 3562 hci_stack->connectable = enable; 3563 hci_update_scan_enable(); 3564 } 3565 #endif 3566 3567 void gap_local_bd_addr(bd_addr_t address_buffer){ 3568 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3569 } 3570 3571 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3572 static void hci_host_num_completed_packets(void){ 3573 3574 // create packet manually as arrays are not supported and num_commands should not get reduced 3575 hci_reserve_packet_buffer(); 3576 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3577 3578 uint16_t size = 0; 3579 uint16_t num_handles = 0; 3580 packet[size++] = 0x35; 3581 packet[size++] = 0x0c; 3582 size++; // skip param len 3583 size++; // skip num handles 3584 3585 // add { handle, packets } entries 3586 btstack_linked_item_t * it; 3587 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3588 hci_connection_t * connection = (hci_connection_t *) it; 3589 if (connection->num_packets_completed){ 3590 little_endian_store_16(packet, size, connection->con_handle); 3591 size += 2; 3592 little_endian_store_16(packet, size, connection->num_packets_completed); 3593 size += 2; 3594 // 3595 num_handles++; 3596 connection->num_packets_completed = 0; 3597 } 3598 } 3599 3600 packet[2] = size - 3; 3601 packet[3] = num_handles; 3602 3603 hci_stack->host_completed_packets = 0; 3604 3605 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3606 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3607 3608 // release packet buffer for synchronous transport implementations 3609 if (hci_transport_synchronous()){ 3610 hci_release_packet_buffer(); 3611 hci_emit_transport_packet_sent(); 3612 } 3613 } 3614 #endif 3615 3616 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3617 UNUSED(ds); 3618 hci_stack->substate = HCI_HALTING_CLOSE; 3619 // allow packet handlers to defer final shutdown 3620 hci_emit_state(); 3621 hci_run(); 3622 } 3623 3624 static bool hci_run_acl_fragments(void){ 3625 if (hci_stack->acl_fragmentation_total_size > 0u) { 3626 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3627 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3628 if (connection) { 3629 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3630 hci_send_acl_packet_fragments(connection); 3631 return true; 3632 } 3633 } else { 3634 // connection gone -> discard further fragments 3635 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3636 hci_stack->acl_fragmentation_total_size = 0; 3637 hci_stack->acl_fragmentation_pos = 0; 3638 } 3639 } 3640 return false; 3641 } 3642 3643 #ifdef ENABLE_CLASSIC 3644 static bool hci_run_general_gap_classic(void){ 3645 3646 // decline incoming connections 3647 if (hci_stack->decline_reason){ 3648 uint8_t reason = hci_stack->decline_reason; 3649 hci_stack->decline_reason = 0; 3650 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3651 return true; 3652 } 3653 // send scan enable 3654 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3655 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3656 hci_stack->new_scan_enable_value = 0xff; 3657 return true; 3658 } 3659 // start/stop inquiry 3660 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3661 uint8_t duration = hci_stack->inquiry_state; 3662 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3663 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3664 return true; 3665 } 3666 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3667 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3668 hci_send_cmd(&hci_inquiry_cancel); 3669 return true; 3670 } 3671 // remote name request 3672 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3673 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3674 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3675 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3676 return true; 3677 } 3678 // pairing 3679 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3680 uint8_t state = hci_stack->gap_pairing_state; 3681 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3682 switch (state){ 3683 case GAP_PAIRING_STATE_SEND_PIN: 3684 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); 3685 break; 3686 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3687 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3688 break; 3689 case GAP_PAIRING_STATE_SEND_PASSKEY: 3690 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3691 break; 3692 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3693 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3694 break; 3695 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3696 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3697 break; 3698 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3699 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3700 break; 3701 default: 3702 break; 3703 } 3704 return true; 3705 } 3706 return false; 3707 } 3708 #endif 3709 3710 #ifdef ENABLE_BLE 3711 static bool hci_run_general_gap_le(void){ 3712 3713 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3714 3715 if (hci_stack->state != HCI_STATE_WORKING) return false; 3716 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3717 3718 3719 // Phase 1: collect what to stop 3720 3721 bool scanning_stop = false; 3722 bool connecting_stop = false; 3723 bool advertising_stop = false; 3724 3725 #ifndef ENABLE_LE_CENTRAL 3726 UNUSED(scanning_stop); 3727 UNUSED(connecting_stop); 3728 #endif 3729 #ifndef ENABLE_LE_PERIPHERAL 3730 UNUSED(advertising_stop); 3731 #endif 3732 3733 // check if whitelist needs modification 3734 bool whitelist_modification_pending = false; 3735 btstack_linked_list_iterator_t lit; 3736 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3737 while (btstack_linked_list_iterator_has_next(&lit)){ 3738 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3739 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3740 whitelist_modification_pending = true; 3741 break; 3742 } 3743 } 3744 // check if resolving list needs modification 3745 bool resolving_list_modification_pending = false; 3746 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3747 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3748 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3749 resolving_list_modification_pending = true; 3750 } 3751 #endif 3752 3753 #ifdef ENABLE_LE_CENTRAL 3754 // scanning control 3755 if (hci_stack->le_scanning_active) { 3756 // stop if: 3757 // - parameter change required 3758 // - it's disabled 3759 // - whitelist change required but used for scanning 3760 // - resolving list modified 3761 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3762 if ((hci_stack->le_scanning_param_update) || 3763 !hci_stack->le_scanning_enabled || 3764 scanning_uses_whitelist || 3765 resolving_list_modification_pending){ 3766 3767 scanning_stop = true; 3768 } 3769 } 3770 #endif 3771 3772 #ifdef ENABLE_LE_CENTRAL 3773 // connecting control 3774 bool connecting_with_whitelist; 3775 switch (hci_stack->le_connecting_state){ 3776 case LE_CONNECTING_DIRECT: 3777 case LE_CONNECTING_WHITELIST: 3778 // stop connecting if: 3779 // - connecting uses white and whitelist modification pending 3780 // - if it got disabled 3781 // - resolving list modified 3782 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3783 if ((connecting_with_whitelist && whitelist_modification_pending) || 3784 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3785 resolving_list_modification_pending) { 3786 3787 connecting_stop = true; 3788 } 3789 break; 3790 default: 3791 break; 3792 } 3793 #endif 3794 3795 #ifdef ENABLE_LE_PERIPHERAL 3796 // le advertisement control 3797 if (hci_stack->le_advertisements_active){ 3798 // stop if: 3799 // - parameter change required 3800 // - it's disabled 3801 // - whitelist change required but used for advertisement filter policy 3802 // - resolving list modified 3803 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3804 if ((hci_stack->le_advertisements_todo != 0) || 3805 !hci_stack->le_advertisements_enabled_for_current_roles || 3806 (advertising_uses_whitelist & whitelist_modification_pending) || 3807 resolving_list_modification_pending) { 3808 3809 advertising_stop = true; 3810 } 3811 } 3812 #endif 3813 3814 3815 // Phase 2: stop everything that should be off during modifications 3816 3817 #ifdef ENABLE_LE_CENTRAL 3818 if (scanning_stop){ 3819 hci_stack->le_scanning_active = false; 3820 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3821 return true; 3822 } 3823 #endif 3824 3825 #ifdef ENABLE_LE_CENTRAL 3826 if (connecting_stop){ 3827 hci_send_cmd(&hci_le_create_connection_cancel); 3828 return true; 3829 } 3830 #endif 3831 3832 #ifdef ENABLE_LE_PERIPHERAL 3833 if (advertising_stop){ 3834 hci_stack->le_advertisements_active = false; 3835 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3836 return true; 3837 } 3838 #endif 3839 3840 // Phase 3: modify 3841 3842 #ifdef ENABLE_LE_CENTRAL 3843 if (hci_stack->le_scanning_param_update){ 3844 hci_stack->le_scanning_param_update = false; 3845 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3846 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3847 return true; 3848 } 3849 #endif 3850 3851 #ifdef ENABLE_LE_PERIPHERAL 3852 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3853 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3854 hci_send_cmd(&hci_le_set_advertising_parameters, 3855 hci_stack->le_advertisements_interval_min, 3856 hci_stack->le_advertisements_interval_max, 3857 hci_stack->le_advertisements_type, 3858 hci_stack->le_own_addr_type, 3859 hci_stack->le_advertisements_direct_address_type, 3860 hci_stack->le_advertisements_direct_address, 3861 hci_stack->le_advertisements_channel_map, 3862 hci_stack->le_advertisements_filter_policy); 3863 return true; 3864 } 3865 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3866 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3867 uint8_t adv_data_clean[31]; 3868 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3869 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3870 hci_stack->le_advertisements_data_len); 3871 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3872 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3873 return true; 3874 } 3875 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3876 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3877 uint8_t scan_data_clean[31]; 3878 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3879 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3880 hci_stack->le_scan_response_data_len); 3881 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3882 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3883 return true; 3884 } 3885 #endif 3886 3887 3888 #ifdef ENABLE_LE_CENTRAL 3889 // if connect with whitelist was active and is not cancelled yet, wait until next time 3890 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3891 #endif 3892 3893 // LE Whitelist Management 3894 if (whitelist_modification_pending){ 3895 // add/remove entries 3896 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3897 while (btstack_linked_list_iterator_has_next(&lit)){ 3898 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3899 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3900 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3901 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3902 return true; 3903 } 3904 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3905 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3906 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3907 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3908 return true; 3909 } 3910 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3911 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3912 btstack_memory_whitelist_entry_free(entry); 3913 } 3914 } 3915 } 3916 3917 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3918 // LE Resolving List Management 3919 if (resolving_list_supported) { 3920 uint16_t i; 3921 switch (hci_stack->le_resolving_list_state) { 3922 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3923 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3924 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3925 return true; 3926 case LE_RESOLVING_LIST_READ_SIZE: 3927 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3928 hci_send_cmd(&hci_le_read_resolving_list_size); 3929 return true; 3930 case LE_RESOLVING_LIST_SEND_CLEAR: 3931 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3932 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3933 sizeof(hci_stack->le_resolving_list_add_entries)); 3934 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3935 sizeof(hci_stack->le_resolving_list_remove_entries)); 3936 hci_send_cmd(&hci_le_clear_resolving_list); 3937 return true; 3938 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3939 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3940 uint8_t offset = i >> 3; 3941 uint8_t mask = 1 << (i & 7); 3942 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3943 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3944 bd_addr_t peer_identity_addreses; 3945 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3946 sm_key_t peer_irk; 3947 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3948 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3949 3950 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3951 // trigger whitelist entry 'update' (work around for controller bug) 3952 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3953 while (btstack_linked_list_iterator_has_next(&lit)) { 3954 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3955 if (entry->address_type != peer_identity_addr_type) continue; 3956 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3957 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3958 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3959 } 3960 #endif 3961 3962 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 3963 peer_identity_addreses); 3964 return true; 3965 } 3966 3967 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3968 3969 /* fall through */ 3970 3971 case LE_RESOLVING_LIST_ADD_ENTRIES: 3972 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3973 uint8_t offset = i >> 3; 3974 uint8_t mask = 1 << (i & 7); 3975 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3976 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3977 bd_addr_t peer_identity_addreses; 3978 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3979 sm_key_t peer_irk; 3980 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3981 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3982 const uint8_t *local_irk = gap_get_persistent_irk(); 3983 // command uses format specifier 'P' that stores 16-byte value without flip 3984 uint8_t local_irk_flipped[16]; 3985 uint8_t peer_irk_flipped[16]; 3986 reverse_128(local_irk, local_irk_flipped); 3987 reverse_128(peer_irk, peer_irk_flipped); 3988 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 3989 peer_irk_flipped, local_irk_flipped); 3990 return true; 3991 } 3992 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3993 break; 3994 3995 default: 3996 break; 3997 } 3998 } 3999 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4000 #endif 4001 4002 // Phase 4: restore state 4003 4004 #ifdef ENABLE_LE_CENTRAL 4005 // re-start scanning 4006 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4007 hci_stack->le_scanning_active = true; 4008 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4009 return true; 4010 } 4011 #endif 4012 4013 #ifdef ENABLE_LE_CENTRAL 4014 // re-start connecting 4015 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4016 bd_addr_t null_addr; 4017 memset(null_addr, 0, 6); 4018 hci_send_cmd(&hci_le_create_connection, 4019 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4020 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4021 1, // use whitelist 4022 0, // peer address type 4023 null_addr, // peer bd addr 4024 hci_stack->le_own_addr_type, // our addr type: 4025 hci_stack->le_connection_interval_min, // conn interval min 4026 hci_stack->le_connection_interval_max, // conn interval max 4027 hci_stack->le_connection_latency, // conn latency 4028 hci_stack->le_supervision_timeout, // conn latency 4029 hci_stack->le_minimum_ce_length, // min ce length 4030 hci_stack->le_maximum_ce_length // max ce length 4031 ); 4032 return true; 4033 } 4034 #endif 4035 4036 #ifdef ENABLE_LE_PERIPHERAL 4037 // re-start advertising 4038 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4039 // check if advertisements should be enabled given 4040 hci_stack->le_advertisements_active = true; 4041 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4042 return true; 4043 } 4044 #endif 4045 4046 return false; 4047 } 4048 #endif 4049 4050 static bool hci_run_general_pending_commands(void){ 4051 btstack_linked_item_t * it; 4052 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4053 hci_connection_t * connection = (hci_connection_t *) it; 4054 4055 switch(connection->state){ 4056 case SEND_CREATE_CONNECTION: 4057 switch(connection->address_type){ 4058 #ifdef ENABLE_CLASSIC 4059 case BD_ADDR_TYPE_ACL: 4060 log_info("sending hci_create_connection"); 4061 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4062 break; 4063 #endif 4064 default: 4065 #ifdef ENABLE_BLE 4066 #ifdef ENABLE_LE_CENTRAL 4067 log_info("sending hci_le_create_connection"); 4068 hci_send_cmd(&hci_le_create_connection, 4069 hci_stack->le_connection_scan_interval, // conn scan interval 4070 hci_stack->le_connection_scan_window, // conn scan windows 4071 0, // don't use whitelist 4072 connection->address_type, // peer address type 4073 connection->address, // peer bd addr 4074 hci_stack->le_own_addr_type, // our addr type: 4075 hci_stack->le_connection_interval_min, // conn interval min 4076 hci_stack->le_connection_interval_max, // conn interval max 4077 hci_stack->le_connection_latency, // conn latency 4078 hci_stack->le_supervision_timeout, // conn latency 4079 hci_stack->le_minimum_ce_length, // min ce length 4080 hci_stack->le_maximum_ce_length // max ce length 4081 ); 4082 connection->state = SENT_CREATE_CONNECTION; 4083 #endif 4084 #endif 4085 break; 4086 } 4087 return true; 4088 4089 #ifdef ENABLE_CLASSIC 4090 case RECEIVED_CONNECTION_REQUEST: 4091 connection->role = HCI_ROLE_SLAVE; 4092 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4093 log_info("sending hci_accept_connection_request"); 4094 connection->state = ACCEPTED_CONNECTION_REQUEST; 4095 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4096 } 4097 return true; 4098 #endif 4099 4100 #ifdef ENABLE_BLE 4101 #ifdef ENABLE_LE_CENTRAL 4102 case SEND_CANCEL_CONNECTION: 4103 connection->state = SENT_CANCEL_CONNECTION; 4104 hci_send_cmd(&hci_le_create_connection_cancel); 4105 return true; 4106 #endif 4107 #endif 4108 case SEND_DISCONNECT: 4109 connection->state = SENT_DISCONNECT; 4110 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4111 return true; 4112 4113 default: 4114 break; 4115 } 4116 4117 // no further commands if connection is about to get shut down 4118 if (connection->state == SENT_DISCONNECT) continue; 4119 4120 if (connection->authentication_flags & READ_RSSI){ 4121 connectionClearAuthenticationFlags(connection, READ_RSSI); 4122 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4123 return true; 4124 } 4125 4126 #ifdef ENABLE_CLASSIC 4127 4128 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4129 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4130 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4131 return true; 4132 } 4133 4134 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4135 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4136 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4137 4138 link_key_t link_key; 4139 link_key_type_t link_key_type; 4140 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4141 4142 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4143 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4144 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4145 if (sc_downgrade){ 4146 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4147 connection->state = SENT_DISCONNECT; 4148 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4149 return true; 4150 } 4151 4152 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4153 if (have_link_key && security_level_sufficient){ 4154 connection->link_key_type = link_key_type; 4155 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4156 } else { 4157 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4158 } 4159 return true; 4160 } 4161 4162 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4163 log_info("denying to pin request"); 4164 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4165 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4166 return true; 4167 } 4168 4169 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4170 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4171 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4172 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4173 // tweak authentication requirements 4174 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4175 if (connection->bonding_flags & BONDING_DEDICATED){ 4176 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4177 } 4178 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4179 authreq |= 1; 4180 } 4181 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4182 } else { 4183 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4184 } 4185 return true; 4186 } 4187 4188 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4189 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4190 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4191 return true; 4192 } 4193 4194 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4195 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4196 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4197 return true; 4198 } 4199 4200 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4201 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4202 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4203 return true; 4204 } 4205 4206 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4207 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4208 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4209 return true; 4210 } 4211 4212 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4213 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4214 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4215 return true; 4216 } 4217 4218 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4219 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4220 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4221 connection->state = SENT_DISCONNECT; 4222 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4223 return true; 4224 } 4225 4226 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4227 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4228 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4229 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4230 return true; 4231 } 4232 4233 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4234 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4235 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4236 return true; 4237 } 4238 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4239 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4240 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4241 return true; 4242 } 4243 #endif 4244 4245 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4246 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4247 if (connection->state != SENT_DISCONNECT){ 4248 connection->state = SENT_DISCONNECT; 4249 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4250 return true; 4251 } 4252 } 4253 4254 #ifdef ENABLE_CLASSIC 4255 uint16_t sniff_min_interval; 4256 switch (connection->sniff_min_interval){ 4257 case 0: 4258 break; 4259 case 0xffff: 4260 connection->sniff_min_interval = 0; 4261 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4262 return true; 4263 default: 4264 sniff_min_interval = connection->sniff_min_interval; 4265 connection->sniff_min_interval = 0; 4266 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4267 return true; 4268 } 4269 4270 if (connection->request_role != HCI_ROLE_INVALID){ 4271 hci_role_t role = connection->request_role; 4272 connection->request_role = HCI_ROLE_INVALID; 4273 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4274 return true; 4275 } 4276 #endif 4277 4278 #ifdef ENABLE_BLE 4279 switch (connection->le_con_parameter_update_state){ 4280 // response to L2CAP CON PARAMETER UPDATE REQUEST 4281 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4282 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4283 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4284 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4285 0x0000, 0xffff); 4286 return true; 4287 case CON_PARAMETER_UPDATE_REPLY: 4288 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4289 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4290 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4291 0x0000, 0xffff); 4292 return true; 4293 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4294 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4295 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4296 return true; 4297 default: 4298 break; 4299 } 4300 if (connection->le_phy_update_all_phys != 0xffu){ 4301 uint8_t all_phys = connection->le_phy_update_all_phys; 4302 connection->le_phy_update_all_phys = 0xff; 4303 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); 4304 return true; 4305 } 4306 #endif 4307 } 4308 return false; 4309 } 4310 4311 static void hci_run(void){ 4312 4313 bool done; 4314 4315 // send continuation fragments first, as they block the prepared packet buffer 4316 done = hci_run_acl_fragments(); 4317 if (done) return; 4318 4319 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4320 // send host num completed packets next as they don't require num_cmd_packets > 0 4321 if (!hci_can_send_comand_packet_transport()) return; 4322 if (hci_stack->host_completed_packets){ 4323 hci_host_num_completed_packets(); 4324 return; 4325 } 4326 #endif 4327 4328 if (!hci_can_send_command_packet_now()) return; 4329 4330 // global/non-connection oriented commands 4331 4332 4333 #ifdef ENABLE_CLASSIC 4334 // general gap classic 4335 done = hci_run_general_gap_classic(); 4336 if (done) return; 4337 #endif 4338 4339 #ifdef ENABLE_BLE 4340 // general gap le 4341 done = hci_run_general_gap_le(); 4342 if (done) return; 4343 #endif 4344 4345 // send pending HCI commands 4346 done = hci_run_general_pending_commands(); 4347 if (done) return; 4348 4349 // stack state sub statemachines 4350 hci_connection_t * connection; 4351 switch (hci_stack->state){ 4352 case HCI_STATE_INITIALIZING: 4353 hci_initializing_run(); 4354 break; 4355 4356 case HCI_STATE_HALTING: 4357 4358 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4359 switch (hci_stack->substate){ 4360 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4361 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4362 4363 #ifdef ENABLE_BLE 4364 #ifdef ENABLE_LE_CENTRAL 4365 // free whitelist entries 4366 { 4367 btstack_linked_list_iterator_t lit; 4368 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4369 while (btstack_linked_list_iterator_has_next(&lit)){ 4370 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4371 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4372 btstack_memory_whitelist_entry_free(entry); 4373 } 4374 } 4375 #endif 4376 #endif 4377 // close all open connections 4378 connection = (hci_connection_t *) hci_stack->connections; 4379 if (connection){ 4380 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4381 if (!hci_can_send_command_packet_now()) return; 4382 4383 // check state 4384 if (connection->state == SENT_DISCONNECT) return; 4385 connection->state = SENT_DISCONNECT; 4386 4387 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4388 4389 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4390 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4391 4392 // ... which would be ignored anyway as we shutdown (free) the connection now 4393 hci_shutdown_connection(connection); 4394 4395 // finally, send the disconnect command 4396 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4397 return; 4398 } 4399 4400 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4401 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4402 log_info("HCI_STATE_HALTING: wait 50 ms"); 4403 hci_stack->substate = HCI_HALTING_W4_TIMER; 4404 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4405 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4406 btstack_run_loop_add_timer(&hci_stack->timeout); 4407 break; 4408 } 4409 4410 /* fall through */ 4411 4412 case HCI_HALTING_CLOSE: 4413 log_info("HCI_STATE_HALTING, calling off"); 4414 4415 // switch mode 4416 hci_power_control_off(); 4417 4418 log_info("HCI_STATE_HALTING, emitting state"); 4419 hci_emit_state(); 4420 log_info("HCI_STATE_HALTING, done"); 4421 break; 4422 4423 case HCI_HALTING_W4_TIMER: 4424 // keep waiting 4425 4426 break; 4427 default: 4428 break; 4429 } 4430 4431 break; 4432 4433 case HCI_STATE_FALLING_ASLEEP: 4434 switch(hci_stack->substate) { 4435 case HCI_FALLING_ASLEEP_DISCONNECT: 4436 log_info("HCI_STATE_FALLING_ASLEEP"); 4437 // close all open connections 4438 connection = (hci_connection_t *) hci_stack->connections; 4439 4440 #ifdef HAVE_PLATFORM_IPHONE_OS 4441 // don't close connections, if H4 supports power management 4442 if (btstack_control_iphone_power_management_enabled()){ 4443 connection = NULL; 4444 } 4445 #endif 4446 if (connection){ 4447 4448 // send disconnect 4449 if (!hci_can_send_command_packet_now()) return; 4450 4451 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4452 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4453 4454 // send disconnected event right away - causes higher layer connections to get closed, too. 4455 hci_shutdown_connection(connection); 4456 return; 4457 } 4458 4459 if (hci_classic_supported()){ 4460 // disable page and inquiry scan 4461 if (!hci_can_send_command_packet_now()) return; 4462 4463 log_info("HCI_STATE_HALTING, disabling inq scans"); 4464 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4465 4466 // continue in next sub state 4467 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4468 break; 4469 } 4470 4471 /* fall through */ 4472 4473 case HCI_FALLING_ASLEEP_COMPLETE: 4474 log_info("HCI_STATE_HALTING, calling sleep"); 4475 #ifdef HAVE_PLATFORM_IPHONE_OS 4476 // don't actually go to sleep, if H4 supports power management 4477 if (btstack_control_iphone_power_management_enabled()){ 4478 // SLEEP MODE reached 4479 hci_stack->state = HCI_STATE_SLEEPING; 4480 hci_emit_state(); 4481 break; 4482 } 4483 #endif 4484 // switch mode 4485 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4486 hci_emit_state(); 4487 break; 4488 4489 default: 4490 break; 4491 } 4492 break; 4493 4494 default: 4495 break; 4496 } 4497 } 4498 4499 int hci_send_cmd_packet(uint8_t *packet, int size){ 4500 // house-keeping 4501 4502 #ifdef ENABLE_CLASSIC 4503 bd_addr_t addr; 4504 hci_connection_t * conn; 4505 #endif 4506 #ifdef ENABLE_LE_CENTRAL 4507 uint8_t initiator_filter_policy; 4508 #endif 4509 4510 uint16_t opcode = little_endian_read_16(packet, 0); 4511 switch (opcode) { 4512 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4513 hci_stack->loopback_mode = packet[3]; 4514 break; 4515 4516 #ifdef ENABLE_CLASSIC 4517 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4518 reverse_bd_addr(&packet[3], addr); 4519 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4520 4521 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4522 if (!conn) { 4523 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4524 if (!conn) { 4525 // notify client that alloc failed 4526 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4527 return -1; // packet not sent to controller 4528 } 4529 conn->state = SEND_CREATE_CONNECTION; 4530 conn->role = HCI_ROLE_MASTER; 4531 } 4532 log_info("conn state %u", conn->state); 4533 switch (conn->state) { 4534 // if connection active exists 4535 case OPEN: 4536 // and OPEN, emit connection complete command 4537 hci_emit_connection_complete(addr, conn->con_handle, 0); 4538 return -1; // packet not sent to controller 4539 case RECEIVED_DISCONNECTION_COMPLETE: 4540 // create connection triggered in disconnect complete event, let's do it now 4541 break; 4542 case SEND_CREATE_CONNECTION: 4543 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4544 break; 4545 default: 4546 // otherwise, just ignore as it is already in the open process 4547 return -1; // packet not sent to controller 4548 } 4549 conn->state = SENT_CREATE_CONNECTION; 4550 4551 // track outgoing connection 4552 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4553 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4554 break; 4555 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4556 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4557 break; 4558 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4559 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4560 break; 4561 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4562 if (hci_stack->link_key_db) { 4563 reverse_bd_addr(&packet[3], addr); 4564 hci_stack->link_key_db->delete_link_key(addr); 4565 } 4566 break; 4567 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4568 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4569 reverse_bd_addr(&packet[3], addr); 4570 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4571 if (conn) { 4572 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4573 } 4574 break; 4575 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4576 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4577 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4578 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4579 reverse_bd_addr(&packet[3], addr); 4580 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4581 if (conn) { 4582 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4583 } 4584 break; 4585 4586 #ifdef ENABLE_SCO_OVER_HCI 4587 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4588 // setup_synchronous_connection? Voice setting at offset 22 4589 // TODO: compare to current setting if sco connection already active 4590 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4591 break; 4592 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4593 // accept_synchronus_connection? Voice setting at offset 18 4594 // TODO: compare to current setting if sco connection already active 4595 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4596 break; 4597 #endif 4598 #endif 4599 4600 #ifdef ENABLE_BLE 4601 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4602 hci_stack->le_random_address_set = 1; 4603 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4604 break; 4605 #ifdef ENABLE_LE_PERIPHERAL 4606 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4607 hci_stack->le_advertisements_active = packet[3] != 0; 4608 break; 4609 #endif 4610 #ifdef ENABLE_LE_CENTRAL 4611 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4612 // white list used? 4613 initiator_filter_policy = packet[7]; 4614 switch (initiator_filter_policy) { 4615 case 0: 4616 // whitelist not used 4617 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4618 break; 4619 case 1: 4620 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4621 break; 4622 default: 4623 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4624 break; 4625 } 4626 // track outgoing connection 4627 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4628 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4629 break; 4630 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4631 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4632 break; 4633 #endif 4634 #endif 4635 default: 4636 break; 4637 } 4638 4639 hci_stack->num_cmd_packets--; 4640 4641 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4642 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4643 } 4644 4645 // disconnect because of security block 4646 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4647 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4648 if (!connection) return; 4649 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4650 } 4651 4652 4653 // Configure Secure Simple Pairing 4654 4655 #ifdef ENABLE_CLASSIC 4656 4657 // enable will enable SSP during init 4658 void gap_ssp_set_enable(int enable){ 4659 hci_stack->ssp_enable = enable; 4660 } 4661 4662 static int hci_local_ssp_activated(void){ 4663 return gap_ssp_supported() && hci_stack->ssp_enable; 4664 } 4665 4666 // if set, BTstack will respond to io capability request using authentication requirement 4667 void gap_ssp_set_io_capability(int io_capability){ 4668 hci_stack->ssp_io_capability = io_capability; 4669 } 4670 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4671 hci_stack->ssp_authentication_requirement = authentication_requirement; 4672 } 4673 4674 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4675 void gap_ssp_set_auto_accept(int auto_accept){ 4676 hci_stack->ssp_auto_accept = auto_accept; 4677 } 4678 4679 void gap_secure_connections_enable(bool enable){ 4680 hci_stack->secure_connections_enable = enable; 4681 } 4682 4683 #endif 4684 4685 // va_list part of hci_send_cmd 4686 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4687 if (!hci_can_send_command_packet_now()){ 4688 log_error("hci_send_cmd called but cannot send packet now"); 4689 return 0; 4690 } 4691 4692 // for HCI INITIALIZATION 4693 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4694 hci_stack->last_cmd_opcode = cmd->opcode; 4695 4696 hci_reserve_packet_buffer(); 4697 uint8_t * packet = hci_stack->hci_packet_buffer; 4698 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4699 int err = hci_send_cmd_packet(packet, size); 4700 4701 // release packet buffer on error or for synchronous transport implementations 4702 if ((err < 0) || hci_transport_synchronous()){ 4703 hci_release_packet_buffer(); 4704 hci_emit_transport_packet_sent(); 4705 } 4706 4707 return err; 4708 } 4709 4710 /** 4711 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4712 */ 4713 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4714 va_list argptr; 4715 va_start(argptr, cmd); 4716 int res = hci_send_cmd_va_arg(cmd, argptr); 4717 va_end(argptr); 4718 return res; 4719 } 4720 4721 // Create various non-HCI events. 4722 // TODO: generalize, use table similar to hci_create_command 4723 4724 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4725 // dump packet 4726 if (dump) { 4727 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4728 } 4729 4730 // dispatch to all event handlers 4731 btstack_linked_list_iterator_t it; 4732 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4733 while (btstack_linked_list_iterator_has_next(&it)){ 4734 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4735 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4736 } 4737 } 4738 4739 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4740 if (!hci_stack->acl_packet_handler) return; 4741 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4742 } 4743 4744 #ifdef ENABLE_CLASSIC 4745 static void hci_notify_if_sco_can_send_now(void){ 4746 // notify SCO sender if waiting 4747 if (!hci_stack->sco_waiting_for_can_send_now) return; 4748 if (hci_can_send_sco_packet_now()){ 4749 hci_stack->sco_waiting_for_can_send_now = 0; 4750 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4751 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4752 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4753 } 4754 } 4755 4756 // parsing end emitting has been merged to reduce code size 4757 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4758 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4759 4760 uint8_t * eir_data; 4761 ad_context_t context; 4762 const uint8_t * name; 4763 uint8_t name_len; 4764 4765 if (size < 3) return; 4766 4767 int event_type = hci_event_packet_get_type(packet); 4768 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4769 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4770 4771 switch (event_type){ 4772 case HCI_EVENT_INQUIRY_RESULT: 4773 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4774 if (size != (3 + (num_responses * 14))) return; 4775 break; 4776 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4777 if (size != 257) return; 4778 if (num_responses != 1) return; 4779 break; 4780 default: 4781 return; 4782 } 4783 4784 // event[1] is set at the end 4785 int i; 4786 for (i=0; i<num_responses;i++){ 4787 memset(event, 0, sizeof(event)); 4788 event[0] = GAP_EVENT_INQUIRY_RESULT; 4789 uint8_t event_size = 18; // if name is not set by EIR 4790 4791 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4792 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4793 (void)memcpy(&event[9], 4794 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4795 3); // class of device 4796 (void)memcpy(&event[12], 4797 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4798 2); // clock offset 4799 4800 switch (event_type){ 4801 case HCI_EVENT_INQUIRY_RESULT: 4802 // 14,15,16,17 = 0, size 18 4803 break; 4804 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4805 event[14] = 1; 4806 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4807 // 16,17 = 0, size 18 4808 break; 4809 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4810 event[14] = 1; 4811 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4812 // EIR packets only contain a single inquiry response 4813 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4814 name = NULL; 4815 // Iterate over EIR data 4816 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4817 uint8_t data_type = ad_iterator_get_data_type(&context); 4818 uint8_t data_size = ad_iterator_get_data_len(&context); 4819 const uint8_t * data = ad_iterator_get_data(&context); 4820 // Prefer Complete Local Name over Shortend Local Name 4821 switch (data_type){ 4822 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4823 if (name) continue; 4824 /* fall through */ 4825 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4826 name = data; 4827 name_len = data_size; 4828 break; 4829 default: 4830 break; 4831 } 4832 } 4833 if (name){ 4834 event[16] = 1; 4835 // truncate name if needed 4836 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4837 event[17] = len; 4838 (void)memcpy(&event[18], name, len); 4839 event_size += len; 4840 } 4841 break; 4842 default: 4843 return; 4844 } 4845 event[1] = event_size - 2; 4846 hci_emit_event(event, event_size, 1); 4847 } 4848 } 4849 #endif 4850 4851 void hci_emit_state(void){ 4852 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4853 uint8_t event[3]; 4854 event[0] = BTSTACK_EVENT_STATE; 4855 event[1] = sizeof(event) - 2u; 4856 event[2] = hci_stack->state; 4857 hci_emit_event(event, sizeof(event), 1); 4858 } 4859 4860 #ifdef ENABLE_CLASSIC 4861 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4862 uint8_t event[13]; 4863 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4864 event[1] = sizeof(event) - 2; 4865 event[2] = status; 4866 little_endian_store_16(event, 3, con_handle); 4867 reverse_bd_addr(address, &event[5]); 4868 event[11] = 1; // ACL connection 4869 event[12] = 0; // encryption disabled 4870 hci_emit_event(event, sizeof(event), 1); 4871 } 4872 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4873 if (disable_l2cap_timeouts) return; 4874 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4875 uint8_t event[4]; 4876 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4877 event[1] = sizeof(event) - 2; 4878 little_endian_store_16(event, 2, conn->con_handle); 4879 hci_emit_event(event, sizeof(event), 1); 4880 } 4881 #endif 4882 4883 #ifdef ENABLE_BLE 4884 #ifdef ENABLE_LE_CENTRAL 4885 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){ 4886 uint8_t event[21]; 4887 event[0] = HCI_EVENT_LE_META; 4888 event[1] = sizeof(event) - 2u; 4889 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4890 event[3] = status; 4891 little_endian_store_16(event, 4, con_handle); 4892 event[6] = 0; // TODO: role 4893 event[7] = address_type; 4894 reverse_bd_addr(address, &event[8]); 4895 little_endian_store_16(event, 14, 0); // interval 4896 little_endian_store_16(event, 16, 0); // latency 4897 little_endian_store_16(event, 18, 0); // supervision timeout 4898 event[20] = 0; // master clock accuracy 4899 hci_emit_event(event, sizeof(event), 1); 4900 } 4901 #endif 4902 #endif 4903 4904 static void hci_emit_transport_packet_sent(void){ 4905 // notify upper stack that it might be possible to send again 4906 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4907 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4908 } 4909 4910 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4911 uint8_t event[6]; 4912 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4913 event[1] = sizeof(event) - 2u; 4914 event[2] = 0; // status = OK 4915 little_endian_store_16(event, 3, con_handle); 4916 event[5] = reason; 4917 hci_emit_event(event, sizeof(event), 1); 4918 } 4919 4920 static void hci_emit_nr_connections_changed(void){ 4921 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4922 uint8_t event[3]; 4923 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4924 event[1] = sizeof(event) - 2u; 4925 event[2] = nr_hci_connections(); 4926 hci_emit_event(event, sizeof(event), 1); 4927 } 4928 4929 static void hci_emit_hci_open_failed(void){ 4930 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4931 uint8_t event[2]; 4932 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4933 event[1] = sizeof(event) - 2u; 4934 hci_emit_event(event, sizeof(event), 1); 4935 } 4936 4937 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4938 log_info("hci_emit_dedicated_bonding_result %u ", status); 4939 uint8_t event[9]; 4940 int pos = 0; 4941 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4942 event[pos++] = sizeof(event) - 2u; 4943 event[pos++] = status; 4944 reverse_bd_addr(address, &event[pos]); 4945 hci_emit_event(event, sizeof(event), 1); 4946 } 4947 4948 4949 #ifdef ENABLE_CLASSIC 4950 4951 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4952 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4953 uint8_t event[5]; 4954 int pos = 0; 4955 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4956 event[pos++] = sizeof(event) - 2; 4957 little_endian_store_16(event, 2, con_handle); 4958 pos += 2; 4959 event[pos++] = level; 4960 hci_emit_event(event, sizeof(event), 1); 4961 } 4962 4963 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4964 if (!connection) return LEVEL_0; 4965 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4966 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4967 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4968 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4969 // LEVEL 4 always requires 128 bit encrytion key size 4970 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4971 security_level = LEVEL_3; 4972 } 4973 return security_level; 4974 } 4975 4976 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4977 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4978 uint8_t event[3]; 4979 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4980 event[1] = sizeof(event) - 2; 4981 event[2] = enabled; 4982 hci_emit_event(event, sizeof(event), 1); 4983 } 4984 4985 // query if remote side supports eSCO 4986 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4987 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4988 if (!connection) return 0; 4989 return (connection->remote_supported_features[0] & 1) != 0; 4990 } 4991 4992 static bool hci_ssp_supported(hci_connection_t * connection){ 4993 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4994 return (connection->bonding_flags & mask) == mask; 4995 } 4996 4997 // query if remote side supports SSP 4998 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4999 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5000 if (!connection) return 0; 5001 return hci_ssp_supported(connection) ? 1 : 0; 5002 } 5003 5004 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5005 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5006 } 5007 5008 // GAP API 5009 /** 5010 * @bbrief enable/disable bonding. default is enabled 5011 * @praram enabled 5012 */ 5013 void gap_set_bondable_mode(int enable){ 5014 hci_stack->bondable = enable ? 1 : 0; 5015 } 5016 /** 5017 * @brief Get bondable mode. 5018 * @return 1 if bondable 5019 */ 5020 int gap_get_bondable_mode(void){ 5021 return hci_stack->bondable; 5022 } 5023 5024 /** 5025 * @brief map link keys to security levels 5026 */ 5027 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5028 switch (link_key_type){ 5029 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5030 return LEVEL_4; 5031 case COMBINATION_KEY: 5032 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5033 return LEVEL_3; 5034 default: 5035 return LEVEL_2; 5036 } 5037 } 5038 5039 /** 5040 * @brief map link keys to secure connection yes/no 5041 */ 5042 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5043 switch (link_key_type){ 5044 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5045 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5046 return 1; 5047 default: 5048 return 0; 5049 } 5050 } 5051 5052 /** 5053 * @brief map link keys to authenticated 5054 */ 5055 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5056 switch (link_key_type){ 5057 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5058 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5059 return 1; 5060 default: 5061 return 0; 5062 } 5063 } 5064 5065 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5066 log_info("gap_mitm_protection_required_for_security_level %u", level); 5067 return level > LEVEL_2; 5068 } 5069 5070 /** 5071 * @brief get current security level 5072 */ 5073 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5074 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5075 if (!connection) return LEVEL_0; 5076 return gap_security_level_for_connection(connection); 5077 } 5078 5079 /** 5080 * @brief request connection to device to 5081 * @result GAP_AUTHENTICATION_RESULT 5082 */ 5083 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5084 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5085 if (!connection){ 5086 hci_emit_security_level(con_handle, LEVEL_0); 5087 return; 5088 } 5089 5090 btstack_assert(hci_is_le_connection(connection) == false); 5091 5092 gap_security_level_t current_level = gap_security_level(con_handle); 5093 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5094 requested_level, connection->requested_security_level, current_level); 5095 5096 // assumption: earlier requested security higher than current level => security request is active 5097 if (current_level < connection->requested_security_level){ 5098 if (connection->requested_security_level < requested_level){ 5099 // increase requested level as new level is higher 5100 5101 // TODO: handle re-authentication when done 5102 5103 connection->requested_security_level = requested_level; 5104 } 5105 return; 5106 } 5107 5108 // no request active, notify if security sufficient 5109 if (requested_level <= current_level){ 5110 hci_emit_security_level(con_handle, current_level); 5111 return; 5112 } 5113 5114 // store request 5115 connection->requested_security_level = requested_level; 5116 5117 // start to authenticate connection if authentication not already active 5118 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5119 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5120 hci_run(); 5121 } 5122 5123 /** 5124 * @brief start dedicated bonding with device. disconnect after bonding 5125 * @param device 5126 * @param request MITM protection 5127 * @result GAP_DEDICATED_BONDING_COMPLETE 5128 */ 5129 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5130 5131 // create connection state machine 5132 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5133 5134 if (!connection){ 5135 return BTSTACK_MEMORY_ALLOC_FAILED; 5136 } 5137 5138 // delete linkn key 5139 gap_drop_link_key_for_bd_addr(device); 5140 5141 // configure LEVEL_2/3, dedicated bonding 5142 connection->state = SEND_CREATE_CONNECTION; 5143 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5144 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5145 connection->bonding_flags = BONDING_DEDICATED; 5146 5147 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5148 5149 // handle: connnection failure (connection complete != ok) 5150 // handle: authentication failure 5151 // handle: disconnect on done 5152 5153 hci_run(); 5154 5155 return 0; 5156 } 5157 #endif 5158 5159 void gap_set_local_name(const char * local_name){ 5160 hci_stack->local_name = local_name; 5161 } 5162 5163 5164 #ifdef ENABLE_BLE 5165 5166 #ifdef ENABLE_LE_CENTRAL 5167 void gap_start_scan(void){ 5168 hci_stack->le_scanning_enabled = true; 5169 hci_run(); 5170 } 5171 5172 void gap_stop_scan(void){ 5173 hci_stack->le_scanning_enabled = false; 5174 hci_run(); 5175 } 5176 5177 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5178 hci_stack->le_scan_type = scan_type; 5179 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5180 hci_stack->le_scan_interval = scan_interval; 5181 hci_stack->le_scan_window = scan_window; 5182 hci_stack->le_scanning_param_update = true; 5183 hci_run(); 5184 } 5185 5186 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5187 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5188 } 5189 5190 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5191 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5192 if (!conn){ 5193 // disallow if le connection is already outgoing 5194 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5195 log_error("le connection already active"); 5196 return ERROR_CODE_COMMAND_DISALLOWED; 5197 } 5198 5199 log_info("gap_connect: no connection exists yet, creating context"); 5200 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5201 if (!conn){ 5202 // notify client that alloc failed 5203 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5204 log_info("gap_connect: failed to alloc hci_connection_t"); 5205 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5206 } 5207 5208 // set le connecting state 5209 if (hci_is_le_connection_type(addr_type)){ 5210 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5211 } 5212 5213 conn->state = SEND_CREATE_CONNECTION; 5214 log_info("gap_connect: send create connection next"); 5215 hci_run(); 5216 return ERROR_CODE_SUCCESS; 5217 } 5218 5219 if (!hci_is_le_connection(conn) || 5220 (conn->state == SEND_CREATE_CONNECTION) || 5221 (conn->state == SENT_CREATE_CONNECTION)) { 5222 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5223 log_error("gap_connect: classic connection or connect is already being created"); 5224 return GATT_CLIENT_IN_WRONG_STATE; 5225 } 5226 5227 // check if connection was just disconnected 5228 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5229 log_info("gap_connect: send create connection (again)"); 5230 conn->state = SEND_CREATE_CONNECTION; 5231 hci_run(); 5232 return ERROR_CODE_SUCCESS; 5233 } 5234 5235 log_info("gap_connect: context exists with state %u", conn->state); 5236 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5237 hci_run(); 5238 return ERROR_CODE_SUCCESS; 5239 } 5240 5241 // @assumption: only a single outgoing LE Connection exists 5242 static hci_connection_t * gap_get_outgoing_connection(void){ 5243 btstack_linked_item_t *it; 5244 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5245 hci_connection_t * conn = (hci_connection_t *) it; 5246 if (!hci_is_le_connection(conn)) continue; 5247 switch (conn->state){ 5248 case SEND_CREATE_CONNECTION: 5249 case SENT_CREATE_CONNECTION: 5250 case SENT_CANCEL_CONNECTION: 5251 return conn; 5252 default: 5253 break; 5254 }; 5255 } 5256 return NULL; 5257 } 5258 5259 uint8_t gap_connect_cancel(void){ 5260 hci_connection_t * conn = gap_get_outgoing_connection(); 5261 if (!conn) return 0; 5262 switch (conn->state){ 5263 case SEND_CREATE_CONNECTION: 5264 // skip sending create connection and emit event instead 5265 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5266 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5267 btstack_memory_hci_connection_free( conn ); 5268 break; 5269 case SENT_CREATE_CONNECTION: 5270 // request to send cancel connection 5271 conn->state = SEND_CANCEL_CONNECTION; 5272 hci_run(); 5273 break; 5274 default: 5275 break; 5276 } 5277 return 0; 5278 } 5279 #endif 5280 5281 #ifdef ENABLE_LE_CENTRAL 5282 /** 5283 * @brief Set connection parameters for outgoing connections 5284 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5285 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5286 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5287 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5288 * @param conn_latency, default: 4 5289 * @param supervision_timeout (unit: 10ms), default: 720 ms 5290 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5291 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5292 */ 5293 5294 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5295 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5296 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5297 hci_stack->le_connection_scan_interval = conn_scan_interval; 5298 hci_stack->le_connection_scan_window = conn_scan_window; 5299 hci_stack->le_connection_interval_min = conn_interval_min; 5300 hci_stack->le_connection_interval_max = conn_interval_max; 5301 hci_stack->le_connection_latency = conn_latency; 5302 hci_stack->le_supervision_timeout = supervision_timeout; 5303 hci_stack->le_minimum_ce_length = min_ce_length; 5304 hci_stack->le_maximum_ce_length = max_ce_length; 5305 } 5306 #endif 5307 5308 /** 5309 * @brief Updates the connection parameters for a given LE connection 5310 * @param handle 5311 * @param conn_interval_min (unit: 1.25ms) 5312 * @param conn_interval_max (unit: 1.25ms) 5313 * @param conn_latency 5314 * @param supervision_timeout (unit: 10ms) 5315 * @returns 0 if ok 5316 */ 5317 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5318 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5319 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5320 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5321 connection->le_conn_interval_min = conn_interval_min; 5322 connection->le_conn_interval_max = conn_interval_max; 5323 connection->le_conn_latency = conn_latency; 5324 connection->le_supervision_timeout = supervision_timeout; 5325 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5326 hci_run(); 5327 return 0; 5328 } 5329 5330 /** 5331 * @brief Request an update of the connection parameter for a given LE connection 5332 * @param handle 5333 * @param conn_interval_min (unit: 1.25ms) 5334 * @param conn_interval_max (unit: 1.25ms) 5335 * @param conn_latency 5336 * @param supervision_timeout (unit: 10ms) 5337 * @returns 0 if ok 5338 */ 5339 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5340 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5341 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5342 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5343 connection->le_conn_interval_min = conn_interval_min; 5344 connection->le_conn_interval_max = conn_interval_max; 5345 connection->le_conn_latency = conn_latency; 5346 connection->le_supervision_timeout = supervision_timeout; 5347 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5348 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5349 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5350 return 0; 5351 } 5352 5353 #ifdef ENABLE_LE_PERIPHERAL 5354 5355 /** 5356 * @brief Set Advertisement Data 5357 * @param advertising_data_length 5358 * @param advertising_data (max 31 octets) 5359 * @note data is not copied, pointer has to stay valid 5360 */ 5361 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5362 hci_stack->le_advertisements_data_len = advertising_data_length; 5363 hci_stack->le_advertisements_data = advertising_data; 5364 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5365 hci_run(); 5366 } 5367 5368 /** 5369 * @brief Set Scan Response Data 5370 * @param advertising_data_length 5371 * @param advertising_data (max 31 octets) 5372 * @note data is not copied, pointer has to stay valid 5373 */ 5374 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5375 hci_stack->le_scan_response_data_len = scan_response_data_length; 5376 hci_stack->le_scan_response_data = scan_response_data; 5377 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5378 hci_run(); 5379 } 5380 5381 /** 5382 * @brief Set Advertisement Parameters 5383 * @param adv_int_min 5384 * @param adv_int_max 5385 * @param adv_type 5386 * @param direct_address_type 5387 * @param direct_address 5388 * @param channel_map 5389 * @param filter_policy 5390 * 5391 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5392 */ 5393 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5394 uint8_t direct_address_typ, bd_addr_t direct_address, 5395 uint8_t channel_map, uint8_t filter_policy) { 5396 5397 hci_stack->le_advertisements_interval_min = adv_int_min; 5398 hci_stack->le_advertisements_interval_max = adv_int_max; 5399 hci_stack->le_advertisements_type = adv_type; 5400 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5401 hci_stack->le_advertisements_channel_map = channel_map; 5402 hci_stack->le_advertisements_filter_policy = filter_policy; 5403 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5404 6); 5405 5406 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5407 hci_run(); 5408 } 5409 5410 /** 5411 * @brief Enable/Disable Advertisements 5412 * @param enabled 5413 */ 5414 void gap_advertisements_enable(int enabled){ 5415 hci_stack->le_advertisements_enabled = enabled != 0; 5416 hci_update_advertisements_enabled_for_current_roles(); 5417 hci_run(); 5418 } 5419 5420 #endif 5421 5422 void hci_le_set_own_address_type(uint8_t own_address_type){ 5423 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5424 if (own_address_type == hci_stack->le_own_addr_type) return; 5425 hci_stack->le_own_addr_type = own_address_type; 5426 5427 #ifdef ENABLE_LE_PERIPHERAL 5428 // update advertisement parameters, too 5429 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5430 hci_run(); 5431 #endif 5432 #ifdef ENABLE_LE_CENTRAL 5433 // note: we don't update scan parameters or modify ongoing connection attempts 5434 #endif 5435 } 5436 5437 #endif 5438 5439 uint8_t gap_disconnect(hci_con_handle_t handle){ 5440 hci_connection_t * conn = hci_connection_for_handle(handle); 5441 if (!conn){ 5442 hci_emit_disconnection_complete(handle, 0); 5443 return 0; 5444 } 5445 // ignore if already disconnected 5446 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5447 return 0; 5448 } 5449 conn->state = SEND_DISCONNECT; 5450 hci_run(); 5451 return 0; 5452 } 5453 5454 int gap_read_rssi(hci_con_handle_t con_handle){ 5455 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5456 if (hci_connection == NULL) return 0; 5457 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5458 hci_run(); 5459 return 1; 5460 } 5461 5462 /** 5463 * @brief Get connection type 5464 * @param con_handle 5465 * @result connection_type 5466 */ 5467 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5468 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5469 if (!conn) return GAP_CONNECTION_INVALID; 5470 switch (conn->address_type){ 5471 case BD_ADDR_TYPE_LE_PUBLIC: 5472 case BD_ADDR_TYPE_LE_RANDOM: 5473 return GAP_CONNECTION_LE; 5474 case BD_ADDR_TYPE_SCO: 5475 return GAP_CONNECTION_SCO; 5476 case BD_ADDR_TYPE_ACL: 5477 return GAP_CONNECTION_ACL; 5478 default: 5479 return GAP_CONNECTION_INVALID; 5480 } 5481 } 5482 5483 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5484 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5485 if (!conn) return HCI_ROLE_INVALID; 5486 return (hci_role_t) conn->role; 5487 } 5488 5489 5490 #ifdef ENABLE_CLASSIC 5491 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5492 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5493 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5494 conn->request_role = role; 5495 hci_run(); 5496 return ERROR_CODE_SUCCESS; 5497 } 5498 #endif 5499 5500 #ifdef ENABLE_BLE 5501 5502 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){ 5503 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5504 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5505 5506 conn->le_phy_update_all_phys = all_phys; 5507 conn->le_phy_update_tx_phys = tx_phys; 5508 conn->le_phy_update_rx_phys = rx_phys; 5509 conn->le_phy_update_phy_options = phy_options; 5510 5511 hci_run(); 5512 5513 return 0; 5514 } 5515 5516 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5517 // check if already in list 5518 btstack_linked_list_iterator_t it; 5519 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5520 while (btstack_linked_list_iterator_has_next(&it)) { 5521 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5522 if (entry->address_type != address_type) { 5523 continue; 5524 } 5525 if (memcmp(entry->address, address, 6) != 0) { 5526 continue; 5527 } 5528 // disallow if already scheduled to add 5529 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5530 return ERROR_CODE_COMMAND_DISALLOWED; 5531 } 5532 // still on controller, but scheduled to remove -> re-add 5533 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5534 return ERROR_CODE_SUCCESS; 5535 } 5536 // alloc and add to list 5537 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5538 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5539 entry->address_type = address_type; 5540 (void)memcpy(entry->address, address, 6); 5541 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5542 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5543 return ERROR_CODE_SUCCESS; 5544 } 5545 5546 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5547 btstack_linked_list_iterator_t it; 5548 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5549 while (btstack_linked_list_iterator_has_next(&it)){ 5550 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5551 if (entry->address_type != address_type) { 5552 continue; 5553 } 5554 if (memcmp(entry->address, address, 6) != 0) { 5555 continue; 5556 } 5557 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5558 // remove from controller if already present 5559 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5560 } else { 5561 // directly remove entry from whitelist 5562 btstack_linked_list_iterator_remove(&it); 5563 btstack_memory_whitelist_entry_free(entry); 5564 } 5565 return ERROR_CODE_SUCCESS; 5566 } 5567 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5568 } 5569 5570 static void hci_whitelist_clear(void){ 5571 btstack_linked_list_iterator_t it; 5572 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5573 while (btstack_linked_list_iterator_has_next(&it)){ 5574 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5575 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5576 // remove from controller if already present 5577 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5578 continue; 5579 } 5580 // directly remove entry from whitelist 5581 btstack_linked_list_iterator_remove(&it); 5582 btstack_memory_whitelist_entry_free(entry); 5583 } 5584 } 5585 5586 /** 5587 * @brief Clear Whitelist 5588 * @returns 0 if ok 5589 */ 5590 uint8_t gap_whitelist_clear(void){ 5591 hci_whitelist_clear(); 5592 hci_run(); 5593 return ERROR_CODE_SUCCESS; 5594 } 5595 5596 /** 5597 * @brief Add Device to Whitelist 5598 * @param address_typ 5599 * @param address 5600 * @returns 0 if ok 5601 */ 5602 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5603 uint8_t status = hci_whitelist_add(address_type, address); 5604 if (status){ 5605 return status; 5606 } 5607 hci_run(); 5608 return ERROR_CODE_SUCCESS; 5609 } 5610 5611 /** 5612 * @brief Remove Device from Whitelist 5613 * @param address_typ 5614 * @param address 5615 * @returns 0 if ok 5616 */ 5617 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5618 uint8_t status = hci_whitelist_remove(address_type, address); 5619 if (status){ 5620 return status; 5621 } 5622 hci_run(); 5623 return ERROR_CODE_SUCCESS; 5624 } 5625 5626 #ifdef ENABLE_LE_CENTRAL 5627 /** 5628 * @brief Connect with Whitelist 5629 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5630 * @returns - if ok 5631 */ 5632 uint8_t gap_connect_with_whitelist(void){ 5633 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5634 return ERROR_CODE_COMMAND_DISALLOWED; 5635 } 5636 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5637 hci_run(); 5638 return ERROR_CODE_SUCCESS; 5639 } 5640 5641 /** 5642 * @brief Auto Connection Establishment - Start Connecting to device 5643 * @param address_typ 5644 * @param address 5645 * @returns 0 if ok 5646 */ 5647 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5648 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5649 return ERROR_CODE_COMMAND_DISALLOWED; 5650 } 5651 5652 uint8_t status = hci_whitelist_add(address_type, address); 5653 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5654 return status; 5655 } 5656 5657 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5658 5659 hci_run(); 5660 return ERROR_CODE_SUCCESS; 5661 } 5662 5663 /** 5664 * @brief Auto Connection Establishment - Stop Connecting to device 5665 * @param address_typ 5666 * @param address 5667 * @returns 0 if ok 5668 */ 5669 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5670 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5671 return ERROR_CODE_COMMAND_DISALLOWED; 5672 } 5673 5674 hci_whitelist_remove(address_type, address); 5675 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5676 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5677 } 5678 hci_run(); 5679 return 0; 5680 } 5681 5682 /** 5683 * @brief Auto Connection Establishment - Stop everything 5684 * @note Convenience function to stop all active auto connection attempts 5685 */ 5686 uint8_t gap_auto_connection_stop_all(void){ 5687 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5688 return ERROR_CODE_COMMAND_DISALLOWED; 5689 } 5690 hci_whitelist_clear(); 5691 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5692 hci_run(); 5693 return ERROR_CODE_SUCCESS; 5694 } 5695 5696 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5697 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5698 if (!conn) return 0; 5699 return conn->le_connection_interval; 5700 } 5701 #endif 5702 #endif 5703 5704 #ifdef ENABLE_CLASSIC 5705 /** 5706 * @brief Set Extended Inquiry Response data 5707 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5708 * @note has to be done before stack starts up 5709 */ 5710 void gap_set_extended_inquiry_response(const uint8_t * data){ 5711 hci_stack->eir_data = data; 5712 } 5713 5714 /** 5715 * @brief Start GAP Classic Inquiry 5716 * @param duration in 1.28s units 5717 * @return 0 if ok 5718 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5719 */ 5720 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5721 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5722 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5723 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5724 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5725 } 5726 hci_stack->inquiry_state = duration_in_1280ms_units; 5727 hci_run(); 5728 return 0; 5729 } 5730 5731 /** 5732 * @brief Stop GAP Classic Inquiry 5733 * @returns 0 if ok 5734 */ 5735 int gap_inquiry_stop(void){ 5736 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5737 // emit inquiry complete event, before it even started 5738 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5739 hci_emit_event(event, sizeof(event), 1); 5740 return 0; 5741 } 5742 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5743 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5744 hci_run(); 5745 return 0; 5746 } 5747 5748 5749 /** 5750 * @brief Remote Name Request 5751 * @param addr 5752 * @param page_scan_repetition_mode 5753 * @param clock_offset only used when bit 15 is set 5754 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5755 */ 5756 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5757 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5758 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5759 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5760 hci_stack->remote_name_clock_offset = clock_offset; 5761 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5762 hci_run(); 5763 return 0; 5764 } 5765 5766 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5767 hci_stack->gap_pairing_state = state; 5768 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5769 hci_run(); 5770 return 0; 5771 } 5772 5773 /** 5774 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5775 * @param addr 5776 * @param pin_data 5777 * @param pin_len 5778 * @return 0 if ok 5779 */ 5780 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5781 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5782 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5783 hci_stack->gap_pairing_pin_len = pin_len; 5784 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5785 } 5786 5787 /** 5788 * @brief Legacy Pairing Pin Code Response 5789 * @param addr 5790 * @param pin 5791 * @return 0 if ok 5792 */ 5793 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5794 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5795 } 5796 5797 /** 5798 * @brief Abort Legacy Pairing 5799 * @param addr 5800 * @param pin 5801 * @return 0 if ok 5802 */ 5803 int gap_pin_code_negative(bd_addr_t addr){ 5804 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5805 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5806 } 5807 5808 /** 5809 * @brief SSP Passkey Response 5810 * @param addr 5811 * @param passkey 5812 * @return 0 if ok 5813 */ 5814 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5815 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5816 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5817 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5818 } 5819 5820 /** 5821 * @brief Abort SSP Passkey Entry/Pairing 5822 * @param addr 5823 * @param pin 5824 * @return 0 if ok 5825 */ 5826 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5827 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5828 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5829 } 5830 5831 /** 5832 * @brief Accept SSP Numeric Comparison 5833 * @param addr 5834 * @param passkey 5835 * @return 0 if ok 5836 */ 5837 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5838 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5839 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5840 } 5841 5842 /** 5843 * @brief Abort SSP Numeric Comparison/Pairing 5844 * @param addr 5845 * @param pin 5846 * @return 0 if ok 5847 */ 5848 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5849 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5850 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5851 } 5852 5853 /** 5854 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5855 * @param inquiry_mode see bluetooth_defines.h 5856 */ 5857 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5858 hci_stack->inquiry_mode = mode; 5859 } 5860 5861 /** 5862 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5863 */ 5864 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5865 hci_stack->sco_voice_setting = voice_setting; 5866 } 5867 5868 /** 5869 * @brief Get SCO Voice Setting 5870 * @return current voice setting 5871 */ 5872 uint16_t hci_get_sco_voice_setting(void){ 5873 return hci_stack->sco_voice_setting; 5874 } 5875 5876 static int hci_have_usb_transport(void){ 5877 if (!hci_stack->hci_transport) return 0; 5878 const char * transport_name = hci_stack->hci_transport->name; 5879 if (!transport_name) return 0; 5880 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5881 } 5882 5883 /** @brief Get SCO packet length for current SCO Voice setting 5884 * @note Using SCO packets of the exact length is required for USB transfer 5885 * @return Length of SCO packets in bytes (not audio frames) 5886 */ 5887 int hci_get_sco_packet_length(void){ 5888 int sco_packet_length = 0; 5889 5890 #ifdef ENABLE_SCO_OVER_HCI 5891 5892 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5893 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5894 5895 if (hci_have_usb_transport()){ 5896 // see Core Spec for H2 USB Transfer. 5897 // 3 byte SCO header + 24 bytes per connection 5898 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5899 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5900 } else { 5901 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5902 sco_packet_length = 3 + 60 * multiplier; 5903 // assert that it still fits inside an SCO buffer 5904 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5905 sco_packet_length = 3 + 60; 5906 } 5907 } 5908 #endif 5909 return sco_packet_length; 5910 } 5911 5912 /** 5913 * @brief Sets the master/slave policy 5914 * @param policy (0: attempt to become master, 1: let connecting device decide) 5915 */ 5916 void hci_set_master_slave_policy(uint8_t policy){ 5917 hci_stack->master_slave_policy = policy; 5918 } 5919 5920 #endif 5921 5922 HCI_STATE hci_get_state(void){ 5923 return hci_stack->state; 5924 } 5925 5926 #ifdef ENABLE_CLASSIC 5927 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 5928 hci_stack->gap_classic_accept_callback = accept_callback; 5929 } 5930 #endif 5931 5932 /** 5933 * @brief Set callback for Bluetooth Hardware Error 5934 */ 5935 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5936 hci_stack->hardware_error_callback = fn; 5937 } 5938 5939 void hci_disconnect_all(void){ 5940 btstack_linked_list_iterator_t it; 5941 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5942 while (btstack_linked_list_iterator_has_next(&it)){ 5943 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5944 if (con->state == SENT_DISCONNECT) continue; 5945 con->state = SEND_DISCONNECT; 5946 } 5947 hci_run(); 5948 } 5949 5950 uint16_t hci_get_manufacturer(void){ 5951 return hci_stack->manufacturer; 5952 } 5953 5954 #ifdef ENABLE_BLE 5955 5956 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5957 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5958 if (!hci_con) return NULL; 5959 return &hci_con->sm_connection; 5960 } 5961 5962 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5963 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5964 5965 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5966 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5967 if (hci_connection == NULL) return 0; 5968 if (hci_is_le_connection(hci_connection)){ 5969 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5970 if (sm_conn->sm_connection_encrypted) { 5971 return sm_conn->sm_actual_encryption_key_size; 5972 } 5973 } 5974 #ifdef ENABLE_CLASSIC 5975 else { 5976 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5977 return hci_connection->encryption_key_size; 5978 } 5979 } 5980 #endif 5981 return 0; 5982 } 5983 5984 int gap_authenticated(hci_con_handle_t con_handle){ 5985 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5986 if (hci_connection == NULL) return 0; 5987 5988 switch (hci_connection->address_type){ 5989 case BD_ADDR_TYPE_LE_PUBLIC: 5990 case BD_ADDR_TYPE_LE_RANDOM: 5991 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5992 return hci_connection->sm_connection.sm_connection_authenticated; 5993 #ifdef ENABLE_CLASSIC 5994 case BD_ADDR_TYPE_SCO: 5995 case BD_ADDR_TYPE_ACL: 5996 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5997 #endif 5998 default: 5999 return 0; 6000 } 6001 } 6002 6003 int gap_secure_connection(hci_con_handle_t con_handle){ 6004 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6005 if (hci_connection == NULL) return 0; 6006 6007 switch (hci_connection->address_type){ 6008 case BD_ADDR_TYPE_LE_PUBLIC: 6009 case BD_ADDR_TYPE_LE_RANDOM: 6010 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6011 return hci_connection->sm_connection.sm_connection_sc; 6012 #ifdef ENABLE_CLASSIC 6013 case BD_ADDR_TYPE_SCO: 6014 case BD_ADDR_TYPE_ACL: 6015 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6016 #endif 6017 default: 6018 return 0; 6019 } 6020 } 6021 6022 bool gap_bonded(hci_con_handle_t con_handle){ 6023 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6024 if (hci_connection == NULL) return 0; 6025 6026 #ifdef ENABLE_CLASSIC 6027 link_key_t link_key; 6028 link_key_type_t link_key_type; 6029 #endif 6030 switch (hci_connection->address_type){ 6031 case BD_ADDR_TYPE_LE_PUBLIC: 6032 case BD_ADDR_TYPE_LE_RANDOM: 6033 return hci_connection->sm_connection.sm_le_db_index >= 0; 6034 #ifdef ENABLE_CLASSIC 6035 case BD_ADDR_TYPE_SCO: 6036 case BD_ADDR_TYPE_ACL: 6037 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6038 #endif 6039 default: 6040 return false; 6041 } 6042 } 6043 6044 6045 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6046 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6047 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6048 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6049 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6050 return sm_conn->sm_connection_authorization_state; 6051 } 6052 #endif 6053 6054 #ifdef ENABLE_CLASSIC 6055 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){ 6056 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6057 if (!conn) return GAP_CONNECTION_INVALID; 6058 conn->sniff_min_interval = sniff_min_interval; 6059 conn->sniff_max_interval = sniff_max_interval; 6060 conn->sniff_attempt = sniff_attempt; 6061 conn->sniff_timeout = sniff_timeout; 6062 hci_run(); 6063 return 0; 6064 } 6065 6066 /** 6067 * @brief Exit Sniff mode 6068 * @param con_handle 6069 @ @return 0 if ok 6070 */ 6071 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6072 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6073 if (!conn) return GAP_CONNECTION_INVALID; 6074 conn->sniff_min_interval = 0xffff; 6075 hci_run(); 6076 return 0; 6077 } 6078 #endif 6079 6080 void hci_halting_defer(void){ 6081 if (hci_stack->state != HCI_STATE_HALTING) return; 6082 switch (hci_stack->substate){ 6083 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6084 case HCI_HALTING_CLOSE: 6085 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6086 break; 6087 default: 6088 break; 6089 } 6090 } 6091 6092 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6093 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6094 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6095 if (le_device_db_index >= le_device_db_max_count()) return; 6096 uint8_t offset = le_device_db_index >> 3; 6097 uint8_t mask = 1 << (le_device_db_index & 7); 6098 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6099 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6100 // note: go back to remove entries, otherwise, a remove + add will skip the add 6101 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6102 } 6103 } 6104 6105 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6106 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6107 if (le_device_db_index >= le_device_db_max_count()) return; 6108 uint8_t offset = le_device_db_index >> 3; 6109 uint8_t mask = 1 << (le_device_db_index & 7); 6110 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6111 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6112 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6113 } 6114 } 6115 6116 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6117 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6118 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6119 } 6120 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6121 // restart le resolving list update 6122 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6123 } 6124 return ERROR_CODE_SUCCESS; 6125 } 6126 #endif 6127 6128 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6129 void hci_setup_test_connections_fuzz(void){ 6130 hci_connection_t * conn; 6131 6132 // default address: 66:55:44:33:00:01 6133 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6134 6135 // setup Controller info 6136 hci_stack->num_cmd_packets = 255; 6137 hci_stack->acl_packets_total_num = 255; 6138 6139 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6140 addr[5] = 0x01; 6141 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6142 conn->con_handle = addr[5]; 6143 conn->role = HCI_ROLE_SLAVE; 6144 conn->state = RECEIVED_CONNECTION_REQUEST; 6145 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6146 6147 // setup incoming Classic SCO connection with con handle 0x0002 6148 addr[5] = 0x02; 6149 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6150 conn->con_handle = addr[5]; 6151 conn->role = HCI_ROLE_SLAVE; 6152 conn->state = RECEIVED_CONNECTION_REQUEST; 6153 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6154 6155 // setup ready Classic ACL connection with con handle 0x0003 6156 addr[5] = 0x03; 6157 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6158 conn->con_handle = addr[5]; 6159 conn->role = HCI_ROLE_SLAVE; 6160 conn->state = OPEN; 6161 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6162 6163 // setup ready Classic SCO connection with con handle 0x0004 6164 addr[5] = 0x04; 6165 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6166 conn->con_handle = addr[5]; 6167 conn->role = HCI_ROLE_SLAVE; 6168 conn->state = OPEN; 6169 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6170 6171 // setup ready LE ACL connection with con handle 0x005 and public address 6172 addr[5] = 0x05; 6173 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6174 conn->con_handle = addr[5]; 6175 conn->role = HCI_ROLE_SLAVE; 6176 conn->state = OPEN; 6177 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6178 } 6179 6180 void hci_free_connections_fuzz(void){ 6181 btstack_linked_list_iterator_t it; 6182 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6183 while (btstack_linked_list_iterator_has_next(&it)){ 6184 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6185 btstack_linked_list_iterator_remove(&it); 6186 btstack_memory_hci_connection_free(con); 6187 } 6188 } 6189 void hci_simulate_working_fuzz(void){ 6190 hci_init_done(); 6191 hci_stack->num_cmd_packets = 255; 6192 } 6193 #endif 6194