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 int more_fragments = 0; 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 = 1; 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)", 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)", 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 int send_cmd = 0; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = 1; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = 1; 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 ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1502 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1503 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1504 log_info("BCM: Route SCO data via HCI transport"); 1505 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1506 break; 1507 1508 #endif 1509 #ifdef ENABLE_BLE 1510 // LE INIT 1511 case HCI_INIT_LE_READ_BUFFER_SIZE: 1512 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1513 hci_send_cmd(&hci_le_read_buffer_size); 1514 break; 1515 case HCI_INIT_LE_SET_EVENT_MASK: 1516 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1517 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1518 break; 1519 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1520 // LE Supported Host = 1, Simultaneous Host = 0 1521 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1522 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1523 break; 1524 #endif 1525 1526 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1527 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1528 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1529 hci_send_cmd(&hci_le_read_maximum_data_length); 1530 break; 1531 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1532 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1533 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1534 break; 1535 #endif 1536 1537 #ifdef ENABLE_LE_CENTRAL 1538 case HCI_INIT_READ_WHITE_LIST_SIZE: 1539 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1540 hci_send_cmd(&hci_le_read_white_list_size); 1541 break; 1542 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1543 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1544 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); 1545 break; 1546 #endif 1547 default: 1548 return; 1549 } 1550 } 1551 1552 static void hci_init_done(void){ 1553 // done. tell the app 1554 log_info("hci_init_done -> HCI_STATE_WORKING"); 1555 hci_stack->state = HCI_STATE_WORKING; 1556 hci_emit_state(); 1557 hci_run(); 1558 } 1559 1560 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1561 bool command_completed = false; 1562 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1563 uint16_t opcode = little_endian_read_16(packet,3); 1564 if (opcode == hci_stack->last_cmd_opcode){ 1565 command_completed = true; 1566 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1567 } else { 1568 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1569 } 1570 } 1571 1572 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1573 uint8_t status = packet[2]; 1574 uint16_t opcode = little_endian_read_16(packet,4); 1575 if (opcode == hci_stack->last_cmd_opcode){ 1576 if (status){ 1577 command_completed = true; 1578 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1579 } else { 1580 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1581 } 1582 } else { 1583 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1584 } 1585 } 1586 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1587 // Vendor == CSR 1588 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1589 // TODO: track actual command 1590 command_completed = true; 1591 } 1592 1593 // Vendor == Toshiba 1594 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1595 // TODO: track actual command 1596 command_completed = true; 1597 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1598 hci_stack->num_cmd_packets = 1; 1599 } 1600 #endif 1601 1602 return command_completed; 1603 } 1604 1605 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1606 1607 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1608 1609 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1610 1611 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1612 1613 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1614 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1615 // 1616 // HCI Reset 1617 // Timeout 100 ms 1618 // HCI Reset 1619 // Command Complete Reset 1620 // HCI Read Local Version Information 1621 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1622 // hang... 1623 // 1624 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1625 if (!command_completed 1626 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1627 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1628 1629 uint16_t opcode = little_endian_read_16(packet,3); 1630 if (opcode == hci_reset.opcode){ 1631 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1632 return; 1633 } 1634 } 1635 1636 // CSR & H5 1637 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1638 if (!command_completed 1639 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1640 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1641 1642 uint16_t opcode = little_endian_read_16(packet,3); 1643 if (opcode == hci_reset.opcode){ 1644 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1645 return; 1646 } 1647 } 1648 1649 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1650 // fix: Correct substate and behave as command below 1651 if (command_completed){ 1652 switch (hci_stack->substate){ 1653 case HCI_INIT_SEND_RESET: 1654 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1655 break; 1656 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1657 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1658 break; 1659 default: 1660 break; 1661 } 1662 } 1663 1664 #endif 1665 1666 if (!command_completed) return; 1667 1668 bool need_baud_change = false; 1669 bool need_addr_change = false; 1670 1671 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1672 need_baud_change = hci_stack->config 1673 && hci_stack->chipset 1674 && hci_stack->chipset->set_baudrate_command 1675 && hci_stack->hci_transport->set_baudrate 1676 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1677 1678 need_addr_change = hci_stack->custom_bd_addr_set 1679 && hci_stack->chipset 1680 && hci_stack->chipset->set_bd_addr_command; 1681 #endif 1682 1683 switch(hci_stack->substate){ 1684 1685 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1686 case HCI_INIT_SEND_RESET: 1687 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1688 // fix: just correct substate and behave as command below 1689 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1690 btstack_run_loop_remove_timer(&hci_stack->timeout); 1691 break; 1692 case HCI_INIT_W4_SEND_RESET: 1693 btstack_run_loop_remove_timer(&hci_stack->timeout); 1694 break; 1695 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1696 log_info("Received local name, need baud change %d", (int) need_baud_change); 1697 if (need_baud_change){ 1698 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1699 return; 1700 } 1701 // skip baud change 1702 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1703 return; 1704 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1705 // for STLC2500D, baud rate change already happened. 1706 // for others, baud rate gets changed now 1707 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1708 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1709 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1710 hci_stack->hci_transport->set_baudrate(baud_rate); 1711 } 1712 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1713 return; 1714 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1715 btstack_run_loop_remove_timer(&hci_stack->timeout); 1716 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1717 return; 1718 case HCI_INIT_W4_CUSTOM_INIT: 1719 // repeat custom init 1720 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1721 return; 1722 #else 1723 case HCI_INIT_W4_SEND_RESET: 1724 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1725 return ; 1726 #endif 1727 1728 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1729 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1730 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1731 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1732 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1733 return; 1734 } 1735 if (need_addr_change){ 1736 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1737 return; 1738 } 1739 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1740 return; 1741 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1742 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1743 if (need_baud_change){ 1744 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1745 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1746 hci_stack->hci_transport->set_baudrate(baud_rate); 1747 } 1748 if (need_addr_change){ 1749 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1750 return; 1751 } 1752 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1753 return; 1754 case HCI_INIT_W4_SET_BD_ADDR: 1755 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1756 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1757 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1758 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1759 return; 1760 } 1761 // skipping st warm boot 1762 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1763 return; 1764 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1765 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1766 return; 1767 #endif 1768 case HCI_INIT_W4_READ_BD_ADDR: 1769 // only read buffer size if supported 1770 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1771 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1772 return; 1773 } 1774 // skipping read buffer size 1775 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1776 return; 1777 case HCI_INIT_W4_SET_EVENT_MASK: 1778 // skip Classic init commands for LE only chipsets 1779 if (!hci_classic_supported()){ 1780 #ifdef ENABLE_BLE 1781 if (hci_le_supported()){ 1782 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1783 return; 1784 } 1785 #endif 1786 log_error("Neither BR/EDR nor LE supported"); 1787 hci_init_done(); 1788 return; 1789 } 1790 if (!gap_ssp_supported()){ 1791 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1792 return; 1793 } 1794 break; 1795 #ifdef ENABLE_BLE 1796 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1797 // skip write le host if not supported (e.g. on LE only EM9301) 1798 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1799 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1800 return; 1801 1802 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1803 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1804 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1805 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1806 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1807 return; 1808 } 1809 // explicit fall through to reduce repetitions 1810 1811 #ifdef ENABLE_LE_CENTRAL 1812 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1813 #else 1814 hci_init_done(); 1815 #endif 1816 return; 1817 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1818 1819 #endif /* ENABLE_BLE */ 1820 1821 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1822 // skip write secure connections host support if not supported or disabled 1823 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1824 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1825 return; 1826 } 1827 break; 1828 1829 #ifdef ENABLE_SCO_OVER_HCI 1830 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1831 // skip write synchronous flow control if not supported 1832 if (hci_stack->local_supported_commands[0] & 0x04) break; 1833 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1838 // skip write default erroneous data reporting if not supported 1839 if (hci_stack->local_supported_commands[0] & 0x08) break; 1840 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1841 1842 /* fall through */ 1843 1844 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1845 // skip bcm set sco pcm config on non-Broadcom chipsets 1846 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1847 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1848 1849 /* fall through */ 1850 1851 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1852 if (!hci_le_supported()){ 1853 // SKIP LE init for Classic only configuration 1854 hci_init_done(); 1855 return; 1856 } 1857 break; 1858 1859 #else /* !ENABLE_SCO_OVER_HCI */ 1860 1861 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1862 #ifdef ENABLE_BLE 1863 if (hci_le_supported()){ 1864 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1865 return; 1866 } 1867 #endif 1868 // SKIP LE init for Classic only configuration 1869 hci_init_done(); 1870 return; 1871 #endif /* ENABLE_SCO_OVER_HCI */ 1872 1873 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1874 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1875 // Response to command before init done state -> init done 1876 case (HCI_INIT_DONE-1): 1877 hci_init_done(); 1878 return; 1879 #endif 1880 1881 default: 1882 break; 1883 } 1884 hci_initializing_next_state(); 1885 } 1886 1887 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1888 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1889 bd_addr_t bd_address; 1890 (void)memcpy(&bd_address, conn->address, 6); 1891 1892 #ifdef ENABLE_CLASSIC 1893 // cache needed data 1894 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1895 #endif 1896 1897 // connection failed, remove entry 1898 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1899 btstack_memory_hci_connection_free( conn ); 1900 1901 #ifdef ENABLE_CLASSIC 1902 // notify client if dedicated bonding 1903 if (notify_dedicated_bonding_failed){ 1904 log_info("hci notify_dedicated_bonding_failed"); 1905 hci_emit_dedicated_bonding_result(bd_address, status); 1906 } 1907 1908 // if authentication error, also delete link key 1909 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1910 gap_drop_link_key_for_bd_addr(bd_address); 1911 } 1912 #else 1913 UNUSED(status); 1914 #endif 1915 } 1916 1917 #ifdef ENABLE_CLASSIC 1918 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1919 // SSP Controller 1920 if (features[6] & (1 << 3)){ 1921 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1922 } 1923 // eSCO 1924 if (features[3] & (1<<7)){ 1925 conn->remote_supported_features[0] |= 1; 1926 } 1927 // Extended features 1928 if (features[7] & (1<<7)){ 1929 conn->remote_supported_features[0] |= 2; 1930 } 1931 } 1932 1933 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1934 // SSP Host 1935 if (features[0] & (1 << 0)){ 1936 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1937 } 1938 // SC Host 1939 if (features[0] & (1 << 3)){ 1940 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1941 } 1942 } 1943 1944 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1945 // SC Controller 1946 if (features[1] & (1 << 0)){ 1947 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1948 } 1949 } 1950 1951 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1952 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1953 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1954 if (conn->bonding_flags & BONDING_DEDICATED){ 1955 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1956 } 1957 } 1958 #endif 1959 1960 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1961 // handle BT initialization 1962 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1963 hci_initializing_event_handler(packet, size); 1964 } 1965 1966 // help with BT sleep 1967 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1968 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1969 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1970 hci_initializing_next_state(); 1971 } 1972 } 1973 1974 #ifdef ENABLE_CLASSIC 1975 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1976 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1977 conn->encryption_key_size = encryption_key_size; 1978 1979 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1980 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1981 return; 1982 } 1983 1984 // Request Authentication if not already done 1985 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1986 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1987 } 1988 #endif 1989 1990 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1991 UNUSED(size); 1992 1993 uint16_t manufacturer; 1994 #ifdef ENABLE_CLASSIC 1995 hci_con_handle_t handle; 1996 hci_connection_t * conn; 1997 uint8_t status; 1998 #endif 1999 // get num cmd packets - limit to 1 to reduce complexity 2000 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2001 2002 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2003 switch (opcode){ 2004 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2005 if (packet[5]) break; 2006 // terminate, name 248 chars 2007 packet[6+248] = 0; 2008 log_info("local name: %s", &packet[6]); 2009 break; 2010 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2011 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2012 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2013 uint16_t acl_len = little_endian_read_16(packet, 6); 2014 uint16_t sco_len = packet[8]; 2015 2016 // determine usable ACL/SCO payload size 2017 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2018 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2019 2020 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2021 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2022 2023 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2024 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2025 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2026 } 2027 break; 2028 case HCI_OPCODE_HCI_READ_RSSI: 2029 if (packet[5] == ERROR_CODE_SUCCESS){ 2030 uint8_t event[5]; 2031 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2032 event[1] = 3; 2033 (void)memcpy(&event[2], &packet[6], 3); 2034 hci_emit_event(event, sizeof(event), 1); 2035 } 2036 break; 2037 #ifdef ENABLE_BLE 2038 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2039 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2040 hci_stack->le_acl_packets_total_num = packet[8]; 2041 // determine usable ACL payload size 2042 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2043 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2044 } 2045 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2046 break; 2047 #endif 2048 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2049 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2050 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2051 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2052 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); 2053 break; 2054 #endif 2055 #ifdef ENABLE_LE_CENTRAL 2056 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2057 hci_stack->le_whitelist_capacity = packet[6]; 2058 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2059 break; 2060 #endif 2061 case HCI_OPCODE_HCI_READ_BD_ADDR: 2062 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2063 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)); 2064 #ifdef ENABLE_CLASSIC 2065 if (hci_stack->link_key_db){ 2066 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2067 } 2068 #endif 2069 break; 2070 #ifdef ENABLE_CLASSIC 2071 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2072 hci_emit_discoverable_enabled(hci_stack->discoverable); 2073 break; 2074 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2075 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2076 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2077 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2078 hci_emit_event(event, sizeof(event), 1); 2079 } 2080 break; 2081 #endif 2082 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2083 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2084 2085 #ifdef ENABLE_CLASSIC 2086 // determine usable ACL packet types based on host buffer size and supported features 2087 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2088 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2089 #endif 2090 // Classic/LE 2091 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2092 break; 2093 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2094 manufacturer = little_endian_read_16(packet, 10); 2095 // map Cypress to Broadcom 2096 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2097 log_info("Treat Cypress as Broadcom"); 2098 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2099 little_endian_store_16(packet, 10, manufacturer); 2100 } 2101 hci_stack->manufacturer = manufacturer; 2102 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2103 break; 2104 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2105 hci_stack->local_supported_commands[0] = 2106 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2107 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2108 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2109 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2110 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2111 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2112 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2113 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2114 hci_stack->local_supported_commands[1] = 2115 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2116 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2117 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u); // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2118 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2119 break; 2120 #ifdef ENABLE_CLASSIC 2121 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2122 if (packet[5]) return; 2123 hci_stack->synchronous_flow_control_enabled = 1; 2124 break; 2125 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2126 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2127 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2128 conn = hci_connection_for_handle(handle); 2129 if (conn != NULL) { 2130 uint8_t key_size = 0; 2131 if (status == 0){ 2132 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2133 log_info("Handle %04x key Size: %u", handle, key_size); 2134 } else { 2135 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2136 } 2137 hci_handle_read_encryption_key_size_complete(conn, key_size); 2138 } 2139 break; 2140 #endif 2141 default: 2142 break; 2143 } 2144 } 2145 2146 #ifdef ENABLE_BLE 2147 static void event_handle_le_connection_complete(const uint8_t * packet){ 2148 bd_addr_t addr; 2149 bd_addr_type_t addr_type; 2150 hci_connection_t * conn; 2151 2152 // Connection management 2153 reverse_bd_addr(&packet[8], addr); 2154 addr_type = (bd_addr_type_t)packet[7]; 2155 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2156 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2157 2158 #ifdef ENABLE_LE_CENTRAL 2159 // handle error: error is reported only to the initiator -> outgoing connection 2160 if (packet[3]){ 2161 2162 // handle cancelled outgoing connection 2163 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2164 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2165 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2166 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2167 // whitelist connect 2168 if (hci_is_le_connection_type(addr_type)){ 2169 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2170 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2171 } 2172 // get outgoing connection conn struct for direct connect 2173 conn = gap_get_outgoing_connection(); 2174 } 2175 2176 // outgoing le connection establishment is done 2177 if (conn){ 2178 // remove entry 2179 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2180 btstack_memory_hci_connection_free( conn ); 2181 } 2182 return; 2183 } 2184 #endif 2185 2186 // on success, both hosts receive connection complete event 2187 if (packet[6] == HCI_ROLE_MASTER){ 2188 #ifdef ENABLE_LE_CENTRAL 2189 // if we're master on an le connection, it was an outgoing connection and we're done with it 2190 // note: no hci_connection_t object exists yet for connect with whitelist 2191 if (hci_is_le_connection_type(addr_type)){ 2192 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2193 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2194 } 2195 #endif 2196 } else { 2197 #ifdef ENABLE_LE_PERIPHERAL 2198 // if we're slave, it was an incoming connection, advertisements have stopped 2199 hci_stack->le_advertisements_active = false; 2200 #endif 2201 } 2202 2203 // LE connections are auto-accepted, so just create a connection if there isn't one already 2204 if (!conn){ 2205 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2206 } 2207 2208 // no memory, sorry. 2209 if (!conn){ 2210 return; 2211 } 2212 2213 conn->state = OPEN; 2214 conn->role = packet[6]; 2215 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2216 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2217 2218 #ifdef ENABLE_LE_PERIPHERAL 2219 if (packet[6] == HCI_ROLE_SLAVE){ 2220 hci_update_advertisements_enabled_for_current_roles(); 2221 } 2222 #endif 2223 2224 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2225 2226 // restart timer 2227 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2228 // btstack_run_loop_add_timer(&conn->timeout); 2229 2230 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2231 2232 hci_emit_nr_connections_changed(); 2233 } 2234 #endif 2235 2236 static void event_handler(uint8_t *packet, uint16_t size){ 2237 2238 uint16_t event_length = packet[1]; 2239 2240 // assert packet is complete 2241 if (size != (event_length + 2u)){ 2242 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2243 return; 2244 } 2245 2246 bd_addr_t addr; 2247 bd_addr_type_t addr_type; 2248 hci_con_handle_t handle; 2249 hci_connection_t * conn; 2250 int i; 2251 int create_connection_cmd; 2252 2253 #ifdef ENABLE_CLASSIC 2254 uint8_t link_type; 2255 #endif 2256 2257 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2258 2259 switch (hci_event_packet_get_type(packet)) { 2260 2261 case HCI_EVENT_COMMAND_COMPLETE: 2262 handle_command_complete_event(packet, size); 2263 break; 2264 2265 case HCI_EVENT_COMMAND_STATUS: 2266 // get num cmd packets - limit to 1 to reduce complexity 2267 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2268 2269 // check command status to detected failed outgoing connections 2270 create_connection_cmd = 0; 2271 #ifdef ENABLE_CLASSIC 2272 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2273 create_connection_cmd = 1; 2274 } 2275 #endif 2276 #ifdef ENABLE_LE_CENTRAL 2277 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2278 create_connection_cmd = 1; 2279 } 2280 #endif 2281 if (create_connection_cmd) { 2282 uint8_t status = hci_event_command_status_get_status(packet); 2283 addr_type = hci_stack->outgoing_addr_type; 2284 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2285 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); 2286 2287 // reset outgoing address info 2288 memset(hci_stack->outgoing_addr, 0, 6); 2289 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2290 2291 // on error 2292 if (status != ERROR_CODE_SUCCESS){ 2293 #ifdef ENABLE_LE_CENTRAL 2294 if (hci_is_le_connection_type(addr_type)){ 2295 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2296 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2297 } 2298 #endif 2299 // error => outgoing connection failed 2300 if (conn != NULL){ 2301 hci_handle_connection_failed(conn, status); 2302 } 2303 } 2304 } 2305 break; 2306 2307 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2308 if (size < 3) return; 2309 uint16_t num_handles = packet[2]; 2310 if (size != (3u + num_handles * 4u)) return; 2311 uint16_t offset = 3; 2312 for (i=0; i<num_handles;i++){ 2313 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2314 offset += 2u; 2315 uint16_t num_packets = little_endian_read_16(packet, offset); 2316 offset += 2u; 2317 2318 conn = hci_connection_for_handle(handle); 2319 if (!conn){ 2320 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2321 continue; 2322 } 2323 2324 if (conn->num_packets_sent >= num_packets){ 2325 conn->num_packets_sent -= num_packets; 2326 } else { 2327 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2328 conn->num_packets_sent = 0; 2329 } 2330 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2331 2332 #ifdef ENABLE_CLASSIC 2333 // For SCO, we do the can_send_now_check here 2334 hci_notify_if_sco_can_send_now(); 2335 #endif 2336 } 2337 break; 2338 } 2339 2340 #ifdef ENABLE_CLASSIC 2341 case HCI_EVENT_INQUIRY_COMPLETE: 2342 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2343 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2344 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2345 hci_emit_event(event, sizeof(event), 1); 2346 } 2347 break; 2348 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2349 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2350 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2351 } 2352 break; 2353 case HCI_EVENT_CONNECTION_REQUEST: 2354 reverse_bd_addr(&packet[2], addr); 2355 if (hci_stack->gap_classic_accept_callback != NULL){ 2356 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2357 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2358 bd_addr_copy(hci_stack->decline_addr, addr); 2359 break; 2360 } 2361 } 2362 2363 // TODO: eval COD 8-10 2364 link_type = packet[11]; 2365 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2366 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2367 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2368 if (!conn) { 2369 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2370 } 2371 if (!conn) { 2372 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2373 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2374 bd_addr_copy(hci_stack->decline_addr, addr); 2375 break; 2376 } 2377 conn->role = HCI_ROLE_SLAVE; 2378 conn->state = RECEIVED_CONNECTION_REQUEST; 2379 // store info about eSCO 2380 if (link_type == 0x02){ 2381 conn->remote_supported_features[0] |= 1; 2382 } 2383 hci_run(); 2384 break; 2385 2386 case HCI_EVENT_CONNECTION_COMPLETE: 2387 // Connection management 2388 reverse_bd_addr(&packet[5], addr); 2389 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2390 addr_type = BD_ADDR_TYPE_ACL; 2391 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2392 if (conn) { 2393 if (!packet[2]){ 2394 conn->state = OPEN; 2395 conn->con_handle = little_endian_read_16(packet, 3); 2396 2397 // queue get remote feature 2398 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2399 2400 // queue set supervision timeout if we're master 2401 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2402 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2403 } 2404 2405 // restart timer 2406 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2407 btstack_run_loop_add_timer(&conn->timeout); 2408 2409 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2410 2411 hci_emit_nr_connections_changed(); 2412 } else { 2413 // connection failed 2414 hci_handle_connection_failed(conn, packet[2]); 2415 } 2416 } 2417 break; 2418 2419 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2420 reverse_bd_addr(&packet[5], addr); 2421 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2422 if (packet[2]){ 2423 // connection failed 2424 break; 2425 } 2426 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2427 if (!conn) { 2428 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2429 } 2430 if (!conn) { 2431 break; 2432 } 2433 conn->state = OPEN; 2434 conn->con_handle = little_endian_read_16(packet, 3); 2435 2436 #ifdef ENABLE_SCO_OVER_HCI 2437 // update SCO 2438 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2439 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2440 } 2441 // trigger can send now 2442 if (hci_have_usb_transport()){ 2443 hci_stack->sco_can_send_now = 1; 2444 } 2445 #endif 2446 break; 2447 2448 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2449 handle = little_endian_read_16(packet, 3); 2450 conn = hci_connection_for_handle(handle); 2451 if (!conn) break; 2452 if (!packet[2]){ 2453 const uint8_t * features = &packet[5]; 2454 hci_handle_remote_features_page_0(conn, features); 2455 2456 // read extended features if possible 2457 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2458 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2459 break; 2460 } 2461 } 2462 hci_handle_remote_features_received(conn); 2463 break; 2464 2465 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2466 handle = little_endian_read_16(packet, 3); 2467 conn = hci_connection_for_handle(handle); 2468 if (!conn) break; 2469 // status = ok, page = 1 2470 if (!packet[2]) { 2471 uint8_t page_number = packet[5]; 2472 uint8_t maximum_page_number = packet[6]; 2473 const uint8_t * features = &packet[7]; 2474 bool done = false; 2475 switch (page_number){ 2476 case 1: 2477 hci_handle_remote_features_page_1(conn, features); 2478 if (maximum_page_number >= 2){ 2479 // get Secure Connections (Controller) from Page 2 if available 2480 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2481 } else { 2482 // otherwise, assume SC (Controller) == SC (Host) 2483 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2484 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2485 } 2486 done = true; 2487 } 2488 break; 2489 case 2: 2490 hci_handle_remote_features_page_2(conn, features); 2491 done = true; 2492 break; 2493 default: 2494 break; 2495 } 2496 if (!done) break; 2497 } 2498 hci_handle_remote_features_received(conn); 2499 break; 2500 2501 case HCI_EVENT_LINK_KEY_REQUEST: 2502 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2503 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2504 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2505 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2506 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2507 hci_run(); 2508 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2509 return; 2510 2511 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2512 reverse_bd_addr(&packet[2], addr); 2513 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2514 if (!conn) break; 2515 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2516 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2517 // Change Connection Encryption keeps link key type 2518 if (link_key_type != CHANGED_COMBINATION_KEY){ 2519 conn->link_key_type = link_key_type; 2520 } 2521 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2522 // still forward event to allow dismiss of pairing dialog 2523 break; 2524 } 2525 2526 case HCI_EVENT_PIN_CODE_REQUEST: 2527 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2528 // non-bondable mode: pin code negative reply will be sent 2529 if (!hci_stack->bondable){ 2530 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2531 hci_run(); 2532 return; 2533 } 2534 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2535 if (!hci_stack->link_key_db) break; 2536 hci_event_pin_code_request_get_bd_addr(packet, addr); 2537 hci_stack->link_key_db->delete_link_key(addr); 2538 break; 2539 2540 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2541 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2542 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2543 break; 2544 2545 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2546 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2547 if (!hci_stack->ssp_auto_accept) break; 2548 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2549 break; 2550 2551 case HCI_EVENT_USER_PASSKEY_REQUEST: 2552 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2553 if (!hci_stack->ssp_auto_accept) break; 2554 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2555 break; 2556 case HCI_EVENT_MODE_CHANGE: 2557 handle = hci_event_mode_change_get_handle(packet); 2558 conn = hci_connection_for_handle(handle); 2559 if (!conn) break; 2560 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2561 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2562 break; 2563 #endif 2564 2565 case HCI_EVENT_ENCRYPTION_CHANGE: 2566 handle = hci_event_encryption_change_get_connection_handle(packet); 2567 conn = hci_connection_for_handle(handle); 2568 if (!conn) break; 2569 if (hci_event_encryption_change_get_status(packet) == 0u) { 2570 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2571 if (encryption_enabled){ 2572 if (hci_is_le_connection(conn)){ 2573 // For LE, we accept connection as encrypted 2574 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2575 } 2576 #ifdef ENABLE_CLASSIC 2577 else { 2578 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2579 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2580 bool connected_uses_aes_ccm = encryption_enabled == 2; 2581 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2582 log_info("SC during pairing, but only E0 now -> abort"); 2583 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2584 break; 2585 } 2586 2587 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2588 if (connected_uses_aes_ccm){ 2589 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2590 } 2591 2592 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2593 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2594 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2595 } else { 2596 // if not, pretend everything is perfect 2597 hci_handle_read_encryption_key_size_complete(conn, 16); 2598 } 2599 } 2600 #endif 2601 } else { 2602 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2603 } 2604 } 2605 2606 break; 2607 2608 #ifdef ENABLE_CLASSIC 2609 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2610 handle = hci_event_authentication_complete_get_connection_handle(packet); 2611 conn = hci_connection_for_handle(handle); 2612 if (!conn) break; 2613 2614 // ignore authentication event if we didn't request it 2615 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2616 2617 // dedicated bonding: send result and disconnect 2618 if (conn->bonding_flags & BONDING_DEDICATED){ 2619 conn->bonding_flags &= ~BONDING_DEDICATED; 2620 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2621 conn->bonding_status = packet[2]; 2622 break; 2623 } 2624 2625 // authenticated only if auth status == 0 2626 if (hci_event_authentication_complete_get_status(packet) == 0){ 2627 // authenticated 2628 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2629 2630 // If link key sufficient for requested security and not already encrypted, start encryption 2631 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2632 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2633 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2634 break; 2635 } 2636 } 2637 2638 // emit updated security level 2639 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2640 break; 2641 #endif 2642 2643 // HCI_EVENT_DISCONNECTION_COMPLETE 2644 // has been split, to first notify stack before shutting connection down 2645 // see end of function, too. 2646 case HCI_EVENT_DISCONNECTION_COMPLETE: 2647 if (packet[2]) break; // status != 0 2648 handle = little_endian_read_16(packet, 3); 2649 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2650 if (hci_stack->acl_fragmentation_total_size > 0u) { 2651 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2652 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2653 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2654 hci_stack->acl_fragmentation_total_size = 0; 2655 hci_stack->acl_fragmentation_pos = 0; 2656 if (release_buffer){ 2657 hci_release_packet_buffer(); 2658 } 2659 } 2660 } 2661 2662 conn = hci_connection_for_handle(handle); 2663 if (!conn) break; 2664 // mark connection for shutdown 2665 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2666 2667 // emit dedicatd bonding event 2668 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2669 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2670 } 2671 2672 #ifdef ENABLE_BLE 2673 #ifdef ENABLE_LE_PERIPHERAL 2674 // re-enable advertisements for le connections if active 2675 if (hci_is_le_connection(conn)){ 2676 hci_update_advertisements_enabled_for_current_roles(); 2677 } 2678 #endif 2679 #endif 2680 break; 2681 2682 case HCI_EVENT_HARDWARE_ERROR: 2683 log_error("Hardware Error: 0x%02x", packet[2]); 2684 if (hci_stack->hardware_error_callback){ 2685 (*hci_stack->hardware_error_callback)(packet[2]); 2686 } else { 2687 // if no special requests, just reboot stack 2688 hci_power_control_off(); 2689 hci_power_control_on(); 2690 } 2691 break; 2692 2693 #ifdef ENABLE_CLASSIC 2694 case HCI_EVENT_ROLE_CHANGE: 2695 if (packet[2]) break; // status != 0 2696 reverse_bd_addr(&packet[3], addr); 2697 addr_type = BD_ADDR_TYPE_ACL; 2698 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2699 if (!conn) break; 2700 conn->role = packet[9]; 2701 break; 2702 #endif 2703 2704 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2705 // release packet buffer only for asynchronous transport and if there are not further fragements 2706 if (hci_transport_synchronous()) { 2707 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2708 return; // instead of break: to avoid re-entering hci_run() 2709 } 2710 hci_stack->acl_fragmentation_tx_active = 0; 2711 if (hci_stack->acl_fragmentation_total_size) break; 2712 hci_release_packet_buffer(); 2713 2714 // L2CAP receives this event via the hci_emit_event below 2715 2716 #ifdef ENABLE_CLASSIC 2717 // For SCO, we do the can_send_now_check here 2718 hci_notify_if_sco_can_send_now(); 2719 #endif 2720 break; 2721 2722 #ifdef ENABLE_CLASSIC 2723 case HCI_EVENT_SCO_CAN_SEND_NOW: 2724 // For SCO, we do the can_send_now_check here 2725 hci_stack->sco_can_send_now = 1; 2726 hci_notify_if_sco_can_send_now(); 2727 return; 2728 2729 // explode inquriy results for easier consumption 2730 case HCI_EVENT_INQUIRY_RESULT: 2731 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2732 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2733 gap_inquiry_explode(packet, size); 2734 break; 2735 #endif 2736 2737 #ifdef ENABLE_BLE 2738 case HCI_EVENT_LE_META: 2739 switch (packet[2]){ 2740 #ifdef ENABLE_LE_CENTRAL 2741 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2742 // log_info("advertising report received"); 2743 if (!hci_stack->le_scanning_enabled) break; 2744 le_handle_advertisement_report(packet, size); 2745 break; 2746 #endif 2747 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2748 event_handle_le_connection_complete(packet); 2749 break; 2750 2751 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2752 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2753 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2754 conn = hci_connection_for_handle(handle); 2755 if (!conn) break; 2756 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2757 break; 2758 2759 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2760 // connection 2761 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2762 conn = hci_connection_for_handle(handle); 2763 if (conn) { 2764 // read arguments 2765 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2766 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2767 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2768 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2769 2770 // validate against current connection parameter range 2771 le_connection_parameter_range_t existing_range; 2772 gap_get_connection_parameter_range(&existing_range); 2773 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2774 if (update_parameter){ 2775 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2776 conn->le_conn_interval_min = le_conn_interval_min; 2777 conn->le_conn_interval_max = le_conn_interval_max; 2778 conn->le_conn_latency = le_conn_latency; 2779 conn->le_supervision_timeout = le_supervision_timeout; 2780 } else { 2781 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2782 } 2783 } 2784 break; 2785 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2786 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2787 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2788 conn = hci_connection_for_handle(handle); 2789 if (conn) { 2790 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2791 } 2792 break; 2793 #endif 2794 default: 2795 break; 2796 } 2797 break; 2798 #endif 2799 case HCI_EVENT_VENDOR_SPECIFIC: 2800 // Vendor specific commands often create vendor specific event instead of num completed packets 2801 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2802 switch (hci_stack->manufacturer){ 2803 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2804 hci_stack->num_cmd_packets = 1; 2805 break; 2806 default: 2807 break; 2808 } 2809 break; 2810 default: 2811 break; 2812 } 2813 2814 handle_event_for_current_stack_state(packet, size); 2815 2816 // notify upper stack 2817 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2818 2819 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2820 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2821 handle = little_endian_read_16(packet, 3); 2822 hci_connection_t * aConn = hci_connection_for_handle(handle); 2823 // discard connection if app did not trigger a reconnect in the event handler 2824 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2825 hci_shutdown_connection(aConn); 2826 } 2827 } 2828 2829 // execute main loop 2830 hci_run(); 2831 } 2832 2833 #ifdef ENABLE_CLASSIC 2834 2835 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2836 static void sco_schedule_tx(hci_connection_t * conn); 2837 2838 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2839 log_debug("SCO TX Timeout"); 2840 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2841 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2842 if (!conn) return; 2843 2844 // trigger send 2845 conn->sco_tx_ready = 1; 2846 // extra packet if CVSD but SCO buffer is too short 2847 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2848 conn->sco_tx_ready++; 2849 } 2850 hci_notify_if_sco_can_send_now(); 2851 } 2852 2853 2854 #define SCO_TX_AFTER_RX_MS (6) 2855 2856 static void sco_schedule_tx(hci_connection_t * conn){ 2857 2858 uint32_t now = btstack_run_loop_get_time_ms(); 2859 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2860 int time_delta_ms = sco_tx_ms - now; 2861 2862 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2863 2864 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2865 btstack_run_loop_set_timer(timer, time_delta_ms); 2866 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2867 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2868 btstack_run_loop_add_timer(timer); 2869 } 2870 2871 static void sco_handler(uint8_t * packet, uint16_t size){ 2872 // lookup connection struct 2873 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2874 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2875 if (!conn) return; 2876 2877 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2878 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2879 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2880 packet[2] = 0x3c; 2881 memmove(&packet[3], &packet[23], 63); 2882 size = 63; 2883 } 2884 } 2885 2886 if (hci_have_usb_transport()){ 2887 // Nothing to do 2888 } else { 2889 // 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); 2890 if (hci_stack->synchronous_flow_control_enabled == 0){ 2891 uint32_t now = btstack_run_loop_get_time_ms(); 2892 2893 if (!conn->sco_rx_valid){ 2894 // ignore first 10 packets 2895 conn->sco_rx_count++; 2896 // log_debug("sco rx count %u", conn->sco_rx_count); 2897 if (conn->sco_rx_count == 10) { 2898 // use first timestamp as is and pretent it just started 2899 conn->sco_rx_ms = now; 2900 conn->sco_rx_valid = 1; 2901 conn->sco_rx_count = 0; 2902 sco_schedule_tx(conn); 2903 } 2904 } else { 2905 // track expected arrival timme 2906 conn->sco_rx_count++; 2907 conn->sco_rx_ms += 7; 2908 int delta = (int32_t) (now - conn->sco_rx_ms); 2909 if (delta > 0){ 2910 conn->sco_rx_ms++; 2911 } 2912 // log_debug("sco rx %u", conn->sco_rx_ms); 2913 sco_schedule_tx(conn); 2914 } 2915 } 2916 } 2917 // deliver to app 2918 if (hci_stack->sco_packet_handler) { 2919 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2920 } 2921 2922 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2923 conn->num_packets_completed++; 2924 hci_stack->host_completed_packets = 1; 2925 hci_run(); 2926 #endif 2927 } 2928 #endif 2929 2930 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2931 hci_dump_packet(packet_type, 1, packet, size); 2932 switch (packet_type) { 2933 case HCI_EVENT_PACKET: 2934 event_handler(packet, size); 2935 break; 2936 case HCI_ACL_DATA_PACKET: 2937 acl_handler(packet, size); 2938 break; 2939 #ifdef ENABLE_CLASSIC 2940 case HCI_SCO_DATA_PACKET: 2941 sco_handler(packet, size); 2942 break; 2943 #endif 2944 default: 2945 break; 2946 } 2947 } 2948 2949 /** 2950 * @brief Add event packet handler. 2951 */ 2952 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2953 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2954 } 2955 2956 2957 /** Register HCI packet handlers */ 2958 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2959 hci_stack->acl_packet_handler = handler; 2960 } 2961 2962 #ifdef ENABLE_CLASSIC 2963 /** 2964 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2965 */ 2966 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2967 hci_stack->sco_packet_handler = handler; 2968 } 2969 #endif 2970 2971 static void hci_state_reset(void){ 2972 // no connections yet 2973 hci_stack->connections = NULL; 2974 2975 // keep discoverable/connectable as this has been requested by the client(s) 2976 // hci_stack->discoverable = 0; 2977 // hci_stack->connectable = 0; 2978 // hci_stack->bondable = 1; 2979 // hci_stack->own_addr_type = 0; 2980 2981 // buffer is free 2982 hci_stack->hci_packet_buffer_reserved = 0; 2983 2984 // no pending cmds 2985 hci_stack->decline_reason = 0; 2986 hci_stack->new_scan_enable_value = 0xff; 2987 2988 hci_stack->secure_connections_active = false; 2989 2990 // LE 2991 #ifdef ENABLE_BLE 2992 memset(hci_stack->le_random_address, 0, 6); 2993 hci_stack->le_random_address_set = 0; 2994 #endif 2995 #ifdef ENABLE_LE_CENTRAL 2996 hci_stack->le_scanning_active = 0; 2997 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2998 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2999 hci_stack->le_whitelist_capacity = 0; 3000 #endif 3001 } 3002 3003 #ifdef ENABLE_CLASSIC 3004 /** 3005 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3006 */ 3007 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3008 // store and open remote device db 3009 hci_stack->link_key_db = link_key_db; 3010 if (hci_stack->link_key_db) { 3011 hci_stack->link_key_db->open(); 3012 } 3013 } 3014 #endif 3015 3016 void hci_init(const hci_transport_t *transport, const void *config){ 3017 3018 #ifdef HAVE_MALLOC 3019 if (!hci_stack) { 3020 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3021 } 3022 #else 3023 hci_stack = &hci_stack_static; 3024 #endif 3025 memset(hci_stack, 0, sizeof(hci_stack_t)); 3026 3027 // reference to use transport layer implementation 3028 hci_stack->hci_transport = transport; 3029 3030 // reference to used config 3031 hci_stack->config = config; 3032 3033 // setup pointer for outgoing packet buffer 3034 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3035 3036 // max acl payload size defined in config.h 3037 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3038 3039 // register packet handlers with transport 3040 transport->register_packet_handler(&packet_handler); 3041 3042 hci_stack->state = HCI_STATE_OFF; 3043 3044 // class of device 3045 hci_stack->class_of_device = 0x007a020c; // Smartphone 3046 3047 // bondable by default 3048 hci_stack->bondable = 1; 3049 3050 #ifdef ENABLE_CLASSIC 3051 // classic name 3052 hci_stack->local_name = default_classic_name; 3053 3054 // Master slave policy 3055 hci_stack->master_slave_policy = 1; 3056 3057 // Allow Role Switch 3058 hci_stack->allow_role_switch = 1; 3059 3060 // Default / minimum security level = 2 3061 hci_stack->gap_security_level = LEVEL_2; 3062 3063 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3064 hci_stack->gap_required_encyrption_key_size = 7; 3065 #endif 3066 3067 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3068 hci_stack->ssp_enable = 1; 3069 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3070 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3071 hci_stack->ssp_auto_accept = 1; 3072 3073 // Secure Connections: enable (requires support from Controller) 3074 hci_stack->secure_connections_enable = true; 3075 3076 // voice setting - signed 16 bit pcm data with CVSD over the air 3077 hci_stack->sco_voice_setting = 0x60; 3078 3079 #ifdef ENABLE_LE_CENTRAL 3080 // connection parameter to use for outgoing connections 3081 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3082 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3083 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3084 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3085 hci_stack->le_connection_latency = 4; // 4 3086 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3087 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3088 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3089 3090 // default LE Scanning 3091 hci_stack->le_scan_type = 0x1; // active 3092 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3093 hci_stack->le_scan_window = 0x30; // 30 ms 3094 #endif 3095 3096 #ifdef ENABLE_LE_PERIPHERAL 3097 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3098 #endif 3099 3100 // connection parameter range used to answer connection parameter update requests in l2cap 3101 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3102 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3103 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3104 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3105 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3106 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3107 3108 hci_state_reset(); 3109 } 3110 3111 /** 3112 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3113 */ 3114 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3115 hci_stack->chipset = chipset_driver; 3116 3117 // reset chipset driver - init is also called on power_up 3118 if (hci_stack->chipset && hci_stack->chipset->init){ 3119 hci_stack->chipset->init(hci_stack->config); 3120 } 3121 } 3122 3123 /** 3124 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3125 */ 3126 void hci_set_control(const btstack_control_t *hardware_control){ 3127 // references to used control implementation 3128 hci_stack->control = hardware_control; 3129 // init with transport config 3130 hardware_control->init(hci_stack->config); 3131 } 3132 3133 void hci_close(void){ 3134 // close remote device db 3135 if (hci_stack->link_key_db) { 3136 hci_stack->link_key_db->close(); 3137 } 3138 3139 btstack_linked_list_iterator_t lit; 3140 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3141 while (btstack_linked_list_iterator_has_next(&lit)){ 3142 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3143 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3144 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3145 hci_shutdown_connection(connection); 3146 } 3147 3148 hci_power_control(HCI_POWER_OFF); 3149 3150 #ifdef HAVE_MALLOC 3151 free(hci_stack); 3152 #endif 3153 hci_stack = NULL; 3154 } 3155 3156 #ifdef ENABLE_CLASSIC 3157 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3158 // validate ranage and set 3159 if (encryption_key_size < 7) return; 3160 if (encryption_key_size > 16) return; 3161 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3162 } 3163 3164 void gap_set_security_level(gap_security_level_t security_level){ 3165 hci_stack->gap_security_level = security_level; 3166 } 3167 3168 gap_security_level_t gap_get_security_level(void){ 3169 return hci_stack->gap_security_level; 3170 } 3171 #endif 3172 3173 #ifdef ENABLE_CLASSIC 3174 void gap_set_class_of_device(uint32_t class_of_device){ 3175 hci_stack->class_of_device = class_of_device; 3176 } 3177 3178 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3179 hci_stack->default_link_policy_settings = default_link_policy_settings; 3180 } 3181 3182 void gap_set_allow_role_switch(bool allow_role_switch){ 3183 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3184 } 3185 3186 uint8_t hci_get_allow_role_switch(void){ 3187 return hci_stack->allow_role_switch; 3188 } 3189 3190 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3191 hci_stack->link_supervision_timeout = link_supervision_timeout; 3192 } 3193 3194 void hci_disable_l2cap_timeout_check(void){ 3195 disable_l2cap_timeouts = 1; 3196 } 3197 #endif 3198 3199 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3200 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3201 void hci_set_bd_addr(bd_addr_t addr){ 3202 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3203 hci_stack->custom_bd_addr_set = 1; 3204 } 3205 #endif 3206 3207 // State-Module-Driver overview 3208 // state module low-level 3209 // HCI_STATE_OFF off close 3210 // HCI_STATE_INITIALIZING, on open 3211 // HCI_STATE_WORKING, on open 3212 // HCI_STATE_HALTING, on open 3213 // HCI_STATE_SLEEPING, off/sleep close 3214 // HCI_STATE_FALLING_ASLEEP on open 3215 3216 static int hci_power_control_on(void){ 3217 3218 // power on 3219 int err = 0; 3220 if (hci_stack->control && hci_stack->control->on){ 3221 err = (*hci_stack->control->on)(); 3222 } 3223 if (err){ 3224 log_error( "POWER_ON failed"); 3225 hci_emit_hci_open_failed(); 3226 return err; 3227 } 3228 3229 // int chipset driver 3230 if (hci_stack->chipset && hci_stack->chipset->init){ 3231 hci_stack->chipset->init(hci_stack->config); 3232 } 3233 3234 // init transport 3235 if (hci_stack->hci_transport->init){ 3236 hci_stack->hci_transport->init(hci_stack->config); 3237 } 3238 3239 // open transport 3240 err = hci_stack->hci_transport->open(); 3241 if (err){ 3242 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3243 if (hci_stack->control && hci_stack->control->off){ 3244 (*hci_stack->control->off)(); 3245 } 3246 hci_emit_hci_open_failed(); 3247 return err; 3248 } 3249 return 0; 3250 } 3251 3252 static void hci_power_control_off(void){ 3253 3254 log_info("hci_power_control_off"); 3255 3256 // close low-level device 3257 hci_stack->hci_transport->close(); 3258 3259 log_info("hci_power_control_off - hci_transport closed"); 3260 3261 // power off 3262 if (hci_stack->control && hci_stack->control->off){ 3263 (*hci_stack->control->off)(); 3264 } 3265 3266 log_info("hci_power_control_off - control closed"); 3267 3268 hci_stack->state = HCI_STATE_OFF; 3269 } 3270 3271 static void hci_power_control_sleep(void){ 3272 3273 log_info("hci_power_control_sleep"); 3274 3275 #if 0 3276 // don't close serial port during sleep 3277 3278 // close low-level device 3279 hci_stack->hci_transport->close(hci_stack->config); 3280 #endif 3281 3282 // sleep mode 3283 if (hci_stack->control && hci_stack->control->sleep){ 3284 (*hci_stack->control->sleep)(); 3285 } 3286 3287 hci_stack->state = HCI_STATE_SLEEPING; 3288 } 3289 3290 static int hci_power_control_wake(void){ 3291 3292 log_info("hci_power_control_wake"); 3293 3294 // wake on 3295 if (hci_stack->control && hci_stack->control->wake){ 3296 (*hci_stack->control->wake)(); 3297 } 3298 3299 #if 0 3300 // open low-level device 3301 int err = hci_stack->hci_transport->open(hci_stack->config); 3302 if (err){ 3303 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3304 if (hci_stack->control && hci_stack->control->off){ 3305 (*hci_stack->control->off)(); 3306 } 3307 hci_emit_hci_open_failed(); 3308 return err; 3309 } 3310 #endif 3311 3312 return 0; 3313 } 3314 3315 static void hci_power_transition_to_initializing(void){ 3316 // set up state machine 3317 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3318 hci_stack->hci_packet_buffer_reserved = 0; 3319 hci_stack->state = HCI_STATE_INITIALIZING; 3320 hci_stack->substate = HCI_INIT_SEND_RESET; 3321 } 3322 3323 int hci_power_control(HCI_POWER_MODE power_mode){ 3324 3325 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3326 3327 int err = 0; 3328 switch (hci_stack->state){ 3329 3330 case HCI_STATE_OFF: 3331 switch (power_mode){ 3332 case HCI_POWER_ON: 3333 err = hci_power_control_on(); 3334 if (err) { 3335 log_error("hci_power_control_on() error %d", err); 3336 return err; 3337 } 3338 hci_power_transition_to_initializing(); 3339 break; 3340 case HCI_POWER_OFF: 3341 // do nothing 3342 break; 3343 case HCI_POWER_SLEEP: 3344 // do nothing (with SLEEP == OFF) 3345 break; 3346 } 3347 break; 3348 3349 case HCI_STATE_INITIALIZING: 3350 switch (power_mode){ 3351 case HCI_POWER_ON: 3352 // do nothing 3353 break; 3354 case HCI_POWER_OFF: 3355 // no connections yet, just turn it off 3356 hci_power_control_off(); 3357 break; 3358 case HCI_POWER_SLEEP: 3359 // no connections yet, just turn it off 3360 hci_power_control_sleep(); 3361 break; 3362 } 3363 break; 3364 3365 case HCI_STATE_WORKING: 3366 switch (power_mode){ 3367 case HCI_POWER_ON: 3368 // do nothing 3369 break; 3370 case HCI_POWER_OFF: 3371 // see hci_run 3372 hci_stack->state = HCI_STATE_HALTING; 3373 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3374 break; 3375 case HCI_POWER_SLEEP: 3376 // see hci_run 3377 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3378 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3379 break; 3380 } 3381 break; 3382 3383 case HCI_STATE_HALTING: 3384 switch (power_mode){ 3385 case HCI_POWER_ON: 3386 hci_power_transition_to_initializing(); 3387 break; 3388 case HCI_POWER_OFF: 3389 // do nothing 3390 break; 3391 case HCI_POWER_SLEEP: 3392 // see hci_run 3393 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3394 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3395 break; 3396 } 3397 break; 3398 3399 case HCI_STATE_FALLING_ASLEEP: 3400 switch (power_mode){ 3401 case HCI_POWER_ON: 3402 3403 #ifdef HAVE_PLATFORM_IPHONE_OS 3404 // nothing to do, if H4 supports power management 3405 if (btstack_control_iphone_power_management_enabled()){ 3406 hci_stack->state = HCI_STATE_INITIALIZING; 3407 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3408 break; 3409 } 3410 #endif 3411 hci_power_transition_to_initializing(); 3412 break; 3413 case HCI_POWER_OFF: 3414 // see hci_run 3415 hci_stack->state = HCI_STATE_HALTING; 3416 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3417 break; 3418 case HCI_POWER_SLEEP: 3419 // do nothing 3420 break; 3421 } 3422 break; 3423 3424 case HCI_STATE_SLEEPING: 3425 switch (power_mode){ 3426 case HCI_POWER_ON: 3427 3428 #ifdef HAVE_PLATFORM_IPHONE_OS 3429 // nothing to do, if H4 supports power management 3430 if (btstack_control_iphone_power_management_enabled()){ 3431 hci_stack->state = HCI_STATE_INITIALIZING; 3432 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3433 hci_update_scan_enable(); 3434 break; 3435 } 3436 #endif 3437 err = hci_power_control_wake(); 3438 if (err) return err; 3439 hci_power_transition_to_initializing(); 3440 break; 3441 case HCI_POWER_OFF: 3442 hci_stack->state = HCI_STATE_HALTING; 3443 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3444 break; 3445 case HCI_POWER_SLEEP: 3446 // do nothing 3447 break; 3448 } 3449 break; 3450 } 3451 3452 // create internal event 3453 hci_emit_state(); 3454 3455 // trigger next/first action 3456 hci_run(); 3457 3458 return 0; 3459 } 3460 3461 3462 #ifdef ENABLE_CLASSIC 3463 3464 static void hci_update_scan_enable(void){ 3465 // 2 = page scan, 1 = inq scan 3466 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3467 hci_run(); 3468 } 3469 3470 void gap_discoverable_control(uint8_t enable){ 3471 if (enable) enable = 1; // normalize argument 3472 3473 if (hci_stack->discoverable == enable){ 3474 hci_emit_discoverable_enabled(hci_stack->discoverable); 3475 return; 3476 } 3477 3478 hci_stack->discoverable = enable; 3479 hci_update_scan_enable(); 3480 } 3481 3482 void gap_connectable_control(uint8_t enable){ 3483 if (enable) enable = 1; // normalize argument 3484 3485 // don't emit event 3486 if (hci_stack->connectable == enable) return; 3487 3488 hci_stack->connectable = enable; 3489 hci_update_scan_enable(); 3490 } 3491 #endif 3492 3493 void gap_local_bd_addr(bd_addr_t address_buffer){ 3494 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3495 } 3496 3497 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3498 static void hci_host_num_completed_packets(void){ 3499 3500 // create packet manually as arrays are not supported and num_commands should not get reduced 3501 hci_reserve_packet_buffer(); 3502 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3503 3504 uint16_t size = 0; 3505 uint16_t num_handles = 0; 3506 packet[size++] = 0x35; 3507 packet[size++] = 0x0c; 3508 size++; // skip param len 3509 size++; // skip num handles 3510 3511 // add { handle, packets } entries 3512 btstack_linked_item_t * it; 3513 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3514 hci_connection_t * connection = (hci_connection_t *) it; 3515 if (connection->num_packets_completed){ 3516 little_endian_store_16(packet, size, connection->con_handle); 3517 size += 2; 3518 little_endian_store_16(packet, size, connection->num_packets_completed); 3519 size += 2; 3520 // 3521 num_handles++; 3522 connection->num_packets_completed = 0; 3523 } 3524 } 3525 3526 packet[2] = size - 3; 3527 packet[3] = num_handles; 3528 3529 hci_stack->host_completed_packets = 0; 3530 3531 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3532 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3533 3534 // release packet buffer for synchronous transport implementations 3535 if (hci_transport_synchronous()){ 3536 hci_release_packet_buffer(); 3537 hci_emit_transport_packet_sent(); 3538 } 3539 } 3540 #endif 3541 3542 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3543 UNUSED(ds); 3544 hci_stack->substate = HCI_HALTING_CLOSE; 3545 // allow packet handlers to defer final shutdown 3546 hci_emit_state(); 3547 hci_run(); 3548 } 3549 3550 static bool hci_run_acl_fragments(void){ 3551 if (hci_stack->acl_fragmentation_total_size > 0u) { 3552 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3553 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3554 if (connection) { 3555 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3556 hci_send_acl_packet_fragments(connection); 3557 return true; 3558 } 3559 } else { 3560 // connection gone -> discard further fragments 3561 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3562 hci_stack->acl_fragmentation_total_size = 0; 3563 hci_stack->acl_fragmentation_pos = 0; 3564 } 3565 } 3566 return false; 3567 } 3568 3569 #ifdef ENABLE_CLASSIC 3570 static bool hci_run_general_gap_classic(void){ 3571 3572 // decline incoming connections 3573 if (hci_stack->decline_reason){ 3574 uint8_t reason = hci_stack->decline_reason; 3575 hci_stack->decline_reason = 0; 3576 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3577 return true; 3578 } 3579 // send scan enable 3580 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3581 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3582 hci_stack->new_scan_enable_value = 0xff; 3583 return true; 3584 } 3585 // start/stop inquiry 3586 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3587 uint8_t duration = hci_stack->inquiry_state; 3588 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3589 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3590 return true; 3591 } 3592 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3593 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3594 hci_send_cmd(&hci_inquiry_cancel); 3595 return true; 3596 } 3597 // remote name request 3598 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3599 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3600 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3601 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3602 return true; 3603 } 3604 // pairing 3605 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3606 uint8_t state = hci_stack->gap_pairing_state; 3607 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3608 switch (state){ 3609 case GAP_PAIRING_STATE_SEND_PIN: 3610 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); 3611 break; 3612 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3613 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3614 break; 3615 case GAP_PAIRING_STATE_SEND_PASSKEY: 3616 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3617 break; 3618 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3619 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3620 break; 3621 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3622 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3623 break; 3624 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3625 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3626 break; 3627 default: 3628 break; 3629 } 3630 return true; 3631 } 3632 return false; 3633 } 3634 #endif 3635 3636 #ifdef ENABLE_BLE 3637 static bool hci_run_general_gap_le(void){ 3638 3639 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3640 3641 if (hci_stack->state != HCI_STATE_WORKING) return false; 3642 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3643 3644 3645 // Phase 1: collect what to stop 3646 3647 bool scanning_stop = false; 3648 bool connecting_stop = false; 3649 bool advertising_stop = false; 3650 3651 #ifndef ENABLE_LE_CENTRAL 3652 UNUSED(scanning_stop); 3653 UNUSED(connecting_stop); 3654 #endif 3655 #ifndef ENABLE_LE_PERIPHERAL 3656 UNUSED(advertising_stop); 3657 #endif 3658 3659 // check if whitelist needs modification 3660 bool whitelist_modification_pending = false; 3661 btstack_linked_list_iterator_t lit; 3662 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3663 while (btstack_linked_list_iterator_has_next(&lit)){ 3664 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3665 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3666 whitelist_modification_pending = true; 3667 break; 3668 } 3669 } 3670 // check if resolving list needs modification 3671 bool resolving_list_modification_pending = false; 3672 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3673 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3674 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3675 resolving_list_modification_pending = true; 3676 } 3677 #endif 3678 3679 #ifdef ENABLE_LE_CENTRAL 3680 // scanning control 3681 if (hci_stack->le_scanning_active) { 3682 // stop if: 3683 // - parameter change required 3684 // - it's disabled 3685 // - whitelist change required but used for scanning 3686 // - resolving list modified 3687 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3688 if ((hci_stack->le_scanning_param_update) || 3689 !hci_stack->le_scanning_enabled || 3690 scanning_uses_whitelist || 3691 resolving_list_modification_pending){ 3692 3693 scanning_stop = true; 3694 } 3695 } 3696 #endif 3697 3698 #ifdef ENABLE_LE_CENTRAL 3699 // connecting control 3700 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3701 // stop connecting if: 3702 // - connecting uses white and whitelist modification pending 3703 // - if it got disabled 3704 // - resolving list modified 3705 bool connecting_uses_whitelist = hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST; 3706 if ((connecting_uses_whitelist && whitelist_modification_pending) || 3707 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3708 resolving_list_modification_pending) { 3709 3710 connecting_stop = true; 3711 } 3712 } 3713 #endif 3714 3715 #ifdef ENABLE_LE_PERIPHERAL 3716 // le advertisement control 3717 if (hci_stack->le_advertisements_active){ 3718 // stop if: 3719 // - parameter change required 3720 // - it's disabled 3721 // - whitelist change required but used for advertisement filter policy 3722 // - resolving list modified 3723 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3724 if ((hci_stack->le_advertisements_todo != 0) || 3725 !hci_stack->le_advertisements_enabled_for_current_roles || 3726 (advertising_uses_whitelist & whitelist_modification_pending) || 3727 resolving_list_modification_pending) { 3728 3729 advertising_stop = true; 3730 } 3731 } 3732 #endif 3733 3734 3735 // Phase 2: stop everything that should be off during modifications 3736 3737 #ifdef ENABLE_LE_CENTRAL 3738 if (scanning_stop){ 3739 hci_stack->le_scanning_active = false; 3740 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3741 return true; 3742 } 3743 #endif 3744 3745 #ifdef ENABLE_LE_CENTRAL 3746 if (connecting_stop){ 3747 if (hci_stack->le_connecting_state != LE_CONNECTING_CANCEL){ 3748 hci_send_cmd(&hci_le_create_connection_cancel); 3749 return true; 3750 } 3751 } 3752 #endif 3753 3754 #ifdef ENABLE_LE_PERIPHERAL 3755 if (advertising_stop){ 3756 hci_stack->le_advertisements_active = false; 3757 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3758 return true; 3759 } 3760 #endif 3761 3762 // Phase 3: modify 3763 3764 #ifdef ENABLE_LE_CENTRAL 3765 if (hci_stack->le_scanning_param_update){ 3766 hci_stack->le_scanning_param_update = false; 3767 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3768 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3769 return true; 3770 } 3771 #endif 3772 3773 #ifdef ENABLE_LE_PERIPHERAL 3774 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3775 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3776 hci_send_cmd(&hci_le_set_advertising_parameters, 3777 hci_stack->le_advertisements_interval_min, 3778 hci_stack->le_advertisements_interval_max, 3779 hci_stack->le_advertisements_type, 3780 hci_stack->le_own_addr_type, 3781 hci_stack->le_advertisements_direct_address_type, 3782 hci_stack->le_advertisements_direct_address, 3783 hci_stack->le_advertisements_channel_map, 3784 hci_stack->le_advertisements_filter_policy); 3785 return true; 3786 } 3787 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3788 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3789 uint8_t adv_data_clean[31]; 3790 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3791 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3792 hci_stack->le_advertisements_data_len); 3793 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3794 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3795 return true; 3796 } 3797 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3798 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3799 uint8_t scan_data_clean[31]; 3800 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3801 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3802 hci_stack->le_scan_response_data_len); 3803 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3804 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3805 return true; 3806 } 3807 #endif 3808 3809 3810 #ifdef ENABLE_LE_CENTRAL 3811 // if connect with whitelist was active and is not cancelled yet, wait until next time 3812 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3813 #endif 3814 3815 // LE Whitelist Management 3816 if (whitelist_modification_pending){ 3817 // add/remove entries 3818 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3819 while (btstack_linked_list_iterator_has_next(&lit)){ 3820 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3821 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3822 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3823 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3824 return true; 3825 } 3826 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3827 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3828 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3829 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3830 return true; 3831 } 3832 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3833 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3834 btstack_memory_whitelist_entry_free(entry); 3835 } 3836 } 3837 } 3838 3839 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3840 // LE Resolving List Management 3841 if (resolving_list_supported) { 3842 uint16_t i; 3843 switch (hci_stack->le_resolving_list_state) { 3844 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3845 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3846 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3847 return true; 3848 case LE_RESOLVING_LIST_READ_SIZE: 3849 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3850 hci_send_cmd(&hci_le_read_resolving_list_size); 3851 return true; 3852 case LE_RESOLVING_LIST_SEND_CLEAR: 3853 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3854 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3855 sizeof(hci_stack->le_resolving_list_add_entries)); 3856 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3857 sizeof(hci_stack->le_resolving_list_remove_entries)); 3858 hci_send_cmd(&hci_le_clear_resolving_list); 3859 return true; 3860 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3861 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3862 uint8_t offset = i >> 3; 3863 uint8_t mask = 1 << (i & 7); 3864 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3865 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3866 bd_addr_t peer_identity_addreses; 3867 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3868 sm_key_t peer_irk; 3869 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3870 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3871 3872 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3873 // trigger whitelist entry 'update' (work around for controller bug) 3874 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3875 while (btstack_linked_list_iterator_has_next(&lit)) { 3876 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3877 if (entry->address_type != peer_identity_addr_type) continue; 3878 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3879 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3880 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3881 } 3882 #endif 3883 3884 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 3885 peer_identity_addreses); 3886 return true; 3887 } 3888 3889 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3890 3891 /* fall through */ 3892 3893 case LE_RESOLVING_LIST_ADD_ENTRIES: 3894 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3895 uint8_t offset = i >> 3; 3896 uint8_t mask = 1 << (i & 7); 3897 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 3898 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 3899 bd_addr_t peer_identity_addreses; 3900 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3901 sm_key_t peer_irk; 3902 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3903 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3904 const uint8_t *local_irk = gap_get_persistent_irk(); 3905 // command uses format specifier 'P' that stores 16-byte value without flip 3906 uint8_t local_irk_flipped[16]; 3907 uint8_t peer_irk_flipped[16]; 3908 reverse_128(local_irk, local_irk_flipped); 3909 reverse_128(peer_irk, peer_irk_flipped); 3910 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 3911 peer_irk_flipped, local_irk_flipped); 3912 return true; 3913 } 3914 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3915 break; 3916 3917 default: 3918 break; 3919 } 3920 } 3921 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 3922 #endif 3923 3924 // Phase 4: restore state 3925 3926 #ifdef ENABLE_LE_CENTRAL 3927 // re-start scanning 3928 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 3929 hci_stack->le_scanning_active = true; 3930 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 3931 return true; 3932 } 3933 #endif 3934 3935 #ifdef ENABLE_LE_CENTRAL 3936 // re-start connecting 3937 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 3938 bd_addr_t null_addr; 3939 memset(null_addr, 0, 6); 3940 hci_send_cmd(&hci_le_create_connection, 3941 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3942 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3943 1, // use whitelist 3944 0, // peer address type 3945 null_addr, // peer bd addr 3946 hci_stack->le_own_addr_type, // our addr type: 3947 hci_stack->le_connection_interval_min, // conn interval min 3948 hci_stack->le_connection_interval_max, // conn interval max 3949 hci_stack->le_connection_latency, // conn latency 3950 hci_stack->le_supervision_timeout, // conn latency 3951 hci_stack->le_minimum_ce_length, // min ce length 3952 hci_stack->le_maximum_ce_length // max ce length 3953 ); 3954 return true; 3955 } 3956 #endif 3957 3958 #ifdef ENABLE_LE_PERIPHERAL 3959 // re-start advertising 3960 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 3961 // check if advertisements should be enabled given 3962 hci_stack->le_advertisements_active = true; 3963 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3964 return true; 3965 } 3966 #endif 3967 3968 return false; 3969 } 3970 #endif 3971 3972 static bool hci_run_general_pending_commands(void){ 3973 btstack_linked_item_t * it; 3974 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3975 hci_connection_t * connection = (hci_connection_t *) it; 3976 3977 switch(connection->state){ 3978 case SEND_CREATE_CONNECTION: 3979 switch(connection->address_type){ 3980 #ifdef ENABLE_CLASSIC 3981 case BD_ADDR_TYPE_ACL: 3982 log_info("sending hci_create_connection"); 3983 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3984 break; 3985 #endif 3986 default: 3987 #ifdef ENABLE_BLE 3988 #ifdef ENABLE_LE_CENTRAL 3989 log_info("sending hci_le_create_connection"); 3990 hci_send_cmd(&hci_le_create_connection, 3991 hci_stack->le_connection_scan_interval, // conn scan interval 3992 hci_stack->le_connection_scan_window, // conn scan windows 3993 0, // don't use whitelist 3994 connection->address_type, // peer address type 3995 connection->address, // peer bd addr 3996 hci_stack->le_own_addr_type, // our addr type: 3997 hci_stack->le_connection_interval_min, // conn interval min 3998 hci_stack->le_connection_interval_max, // conn interval max 3999 hci_stack->le_connection_latency, // conn latency 4000 hci_stack->le_supervision_timeout, // conn latency 4001 hci_stack->le_minimum_ce_length, // min ce length 4002 hci_stack->le_maximum_ce_length // max ce length 4003 ); 4004 connection->state = SENT_CREATE_CONNECTION; 4005 #endif 4006 #endif 4007 break; 4008 } 4009 return true; 4010 4011 #ifdef ENABLE_CLASSIC 4012 case RECEIVED_CONNECTION_REQUEST: 4013 connection->role = HCI_ROLE_SLAVE; 4014 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4015 log_info("sending hci_accept_connection_request"); 4016 connection->state = ACCEPTED_CONNECTION_REQUEST; 4017 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4018 } 4019 return true; 4020 #endif 4021 4022 #ifdef ENABLE_BLE 4023 #ifdef ENABLE_LE_CENTRAL 4024 case SEND_CANCEL_CONNECTION: 4025 connection->state = SENT_CANCEL_CONNECTION; 4026 hci_send_cmd(&hci_le_create_connection_cancel); 4027 return true; 4028 #endif 4029 #endif 4030 case SEND_DISCONNECT: 4031 connection->state = SENT_DISCONNECT; 4032 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4033 return true; 4034 4035 default: 4036 break; 4037 } 4038 4039 // no further commands if connection is about to get shut down 4040 if (connection->state == SENT_DISCONNECT) continue; 4041 4042 if (connection->authentication_flags & READ_RSSI){ 4043 connectionClearAuthenticationFlags(connection, READ_RSSI); 4044 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4045 return true; 4046 } 4047 4048 #ifdef ENABLE_CLASSIC 4049 4050 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4051 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4052 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4053 return true; 4054 } 4055 4056 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4057 log_info("responding to link key request"); 4058 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4059 4060 link_key_t link_key; 4061 link_key_type_t link_key_type; 4062 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4063 4064 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4065 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4066 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4067 if (sc_downgrade){ 4068 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4069 connection->state = SENT_DISCONNECT; 4070 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4071 return true; 4072 } 4073 4074 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4075 if (have_link_key && security_level_sufficient){ 4076 connection->link_key_type = link_key_type; 4077 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4078 } else { 4079 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4080 } 4081 return true; 4082 } 4083 4084 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4085 log_info("denying to pin request"); 4086 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4087 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4088 return true; 4089 } 4090 4091 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4092 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4093 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4094 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4095 // tweak authentication requirements 4096 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4097 if (connection->bonding_flags & BONDING_DEDICATED){ 4098 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4099 } 4100 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4101 authreq |= 1; 4102 } 4103 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 4104 } else { 4105 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4106 } 4107 return true; 4108 } 4109 4110 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4111 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4112 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4113 return true; 4114 } 4115 4116 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4117 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4118 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4119 return true; 4120 } 4121 4122 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4123 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4124 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4125 return true; 4126 } 4127 4128 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4129 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4130 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4131 return true; 4132 } 4133 4134 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4135 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4136 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4137 return true; 4138 } 4139 4140 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4141 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4142 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4143 connection->state = SENT_DISCONNECT; 4144 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4145 return true; 4146 } 4147 4148 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4149 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4150 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4151 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4152 return true; 4153 } 4154 4155 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4156 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4157 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4158 return true; 4159 } 4160 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4161 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4162 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4163 return true; 4164 } 4165 #endif 4166 4167 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4168 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4169 if (connection->state != SENT_DISCONNECT){ 4170 connection->state = SENT_DISCONNECT; 4171 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4172 return true; 4173 } 4174 } 4175 4176 #ifdef ENABLE_CLASSIC 4177 uint16_t sniff_min_interval; 4178 switch (connection->sniff_min_interval){ 4179 case 0: 4180 break; 4181 case 0xffff: 4182 connection->sniff_min_interval = 0; 4183 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4184 return true; 4185 default: 4186 sniff_min_interval = connection->sniff_min_interval; 4187 connection->sniff_min_interval = 0; 4188 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4189 return true; 4190 } 4191 4192 if (connection->request_role != HCI_ROLE_INVALID){ 4193 hci_role_t role = connection->request_role; 4194 connection->request_role = HCI_ROLE_INVALID; 4195 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4196 return true; 4197 } 4198 #endif 4199 4200 #ifdef ENABLE_BLE 4201 switch (connection->le_con_parameter_update_state){ 4202 // response to L2CAP CON PARAMETER UPDATE REQUEST 4203 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4204 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4205 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4206 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4207 0x0000, 0xffff); 4208 return true; 4209 case CON_PARAMETER_UPDATE_REPLY: 4210 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4211 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4212 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4213 0x0000, 0xffff); 4214 return true; 4215 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4216 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4217 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4218 return true; 4219 default: 4220 break; 4221 } 4222 if (connection->le_phy_update_all_phys != 0xffu){ 4223 uint8_t all_phys = connection->le_phy_update_all_phys; 4224 connection->le_phy_update_all_phys = 0xff; 4225 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); 4226 return true; 4227 } 4228 #endif 4229 } 4230 return false; 4231 } 4232 4233 static void hci_run(void){ 4234 4235 bool done; 4236 4237 // send continuation fragments first, as they block the prepared packet buffer 4238 done = hci_run_acl_fragments(); 4239 if (done) return; 4240 4241 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4242 // send host num completed packets next as they don't require num_cmd_packets > 0 4243 if (!hci_can_send_comand_packet_transport()) return; 4244 if (hci_stack->host_completed_packets){ 4245 hci_host_num_completed_packets(); 4246 return; 4247 } 4248 #endif 4249 4250 if (!hci_can_send_command_packet_now()) return; 4251 4252 // global/non-connection oriented commands 4253 4254 4255 #ifdef ENABLE_CLASSIC 4256 // general gap classic 4257 done = hci_run_general_gap_classic(); 4258 if (done) return; 4259 #endif 4260 4261 #ifdef ENABLE_BLE 4262 // general gap le 4263 done = hci_run_general_gap_le(); 4264 if (done) return; 4265 #endif 4266 4267 // send pending HCI commands 4268 done = hci_run_general_pending_commands(); 4269 if (done) return; 4270 4271 // stack state sub statemachines 4272 hci_connection_t * connection; 4273 switch (hci_stack->state){ 4274 case HCI_STATE_INITIALIZING: 4275 hci_initializing_run(); 4276 break; 4277 4278 case HCI_STATE_HALTING: 4279 4280 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4281 switch (hci_stack->substate){ 4282 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4283 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4284 4285 #ifdef ENABLE_BLE 4286 #ifdef ENABLE_LE_CENTRAL 4287 // free whitelist entries 4288 { 4289 btstack_linked_list_iterator_t lit; 4290 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4291 while (btstack_linked_list_iterator_has_next(&lit)){ 4292 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4293 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4294 btstack_memory_whitelist_entry_free(entry); 4295 } 4296 } 4297 #endif 4298 #endif 4299 // close all open connections 4300 connection = (hci_connection_t *) hci_stack->connections; 4301 if (connection){ 4302 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4303 if (!hci_can_send_command_packet_now()) return; 4304 4305 // check state 4306 if (connection->state == SENT_DISCONNECT) return; 4307 connection->state = SENT_DISCONNECT; 4308 4309 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4310 4311 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4312 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4313 4314 // ... which would be ignored anyway as we shutdown (free) the connection now 4315 hci_shutdown_connection(connection); 4316 4317 // finally, send the disconnect command 4318 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4319 return; 4320 } 4321 4322 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4323 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4324 log_info("HCI_STATE_HALTING: wait 50 ms"); 4325 hci_stack->substate = HCI_HALTING_W4_TIMER; 4326 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4327 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4328 btstack_run_loop_add_timer(&hci_stack->timeout); 4329 break; 4330 } 4331 4332 /* fall through */ 4333 4334 case HCI_HALTING_CLOSE: 4335 log_info("HCI_STATE_HALTING, calling off"); 4336 4337 // switch mode 4338 hci_power_control_off(); 4339 4340 log_info("HCI_STATE_HALTING, emitting state"); 4341 hci_emit_state(); 4342 log_info("HCI_STATE_HALTING, done"); 4343 break; 4344 4345 case HCI_HALTING_W4_TIMER: 4346 // keep waiting 4347 4348 break; 4349 default: 4350 break; 4351 } 4352 4353 break; 4354 4355 case HCI_STATE_FALLING_ASLEEP: 4356 switch(hci_stack->substate) { 4357 case HCI_FALLING_ASLEEP_DISCONNECT: 4358 log_info("HCI_STATE_FALLING_ASLEEP"); 4359 // close all open connections 4360 connection = (hci_connection_t *) hci_stack->connections; 4361 4362 #ifdef HAVE_PLATFORM_IPHONE_OS 4363 // don't close connections, if H4 supports power management 4364 if (btstack_control_iphone_power_management_enabled()){ 4365 connection = NULL; 4366 } 4367 #endif 4368 if (connection){ 4369 4370 // send disconnect 4371 if (!hci_can_send_command_packet_now()) return; 4372 4373 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4374 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4375 4376 // send disconnected event right away - causes higher layer connections to get closed, too. 4377 hci_shutdown_connection(connection); 4378 return; 4379 } 4380 4381 if (hci_classic_supported()){ 4382 // disable page and inquiry scan 4383 if (!hci_can_send_command_packet_now()) return; 4384 4385 log_info("HCI_STATE_HALTING, disabling inq scans"); 4386 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4387 4388 // continue in next sub state 4389 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4390 break; 4391 } 4392 4393 /* fall through */ 4394 4395 case HCI_FALLING_ASLEEP_COMPLETE: 4396 log_info("HCI_STATE_HALTING, calling sleep"); 4397 #ifdef HAVE_PLATFORM_IPHONE_OS 4398 // don't actually go to sleep, if H4 supports power management 4399 if (btstack_control_iphone_power_management_enabled()){ 4400 // SLEEP MODE reached 4401 hci_stack->state = HCI_STATE_SLEEPING; 4402 hci_emit_state(); 4403 break; 4404 } 4405 #endif 4406 // switch mode 4407 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4408 hci_emit_state(); 4409 break; 4410 4411 default: 4412 break; 4413 } 4414 break; 4415 4416 default: 4417 break; 4418 } 4419 } 4420 4421 int hci_send_cmd_packet(uint8_t *packet, int size){ 4422 // house-keeping 4423 4424 #ifdef ENABLE_CLASSIC 4425 bd_addr_t addr; 4426 hci_connection_t * conn; 4427 #endif 4428 #ifdef ENABLE_LE_CENTRAL 4429 uint8_t initiator_filter_policy; 4430 #endif 4431 4432 uint16_t opcode = little_endian_read_16(packet, 0); 4433 switch (opcode) { 4434 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4435 hci_stack->loopback_mode = packet[3]; 4436 break; 4437 4438 #ifdef ENABLE_CLASSIC 4439 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4440 reverse_bd_addr(&packet[3], addr); 4441 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4442 4443 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4444 if (!conn) { 4445 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4446 if (!conn) { 4447 // notify client that alloc failed 4448 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4449 return -1; // packet not sent to controller 4450 } 4451 conn->state = SEND_CREATE_CONNECTION; 4452 conn->role = HCI_ROLE_MASTER; 4453 } 4454 log_info("conn state %u", conn->state); 4455 switch (conn->state) { 4456 // if connection active exists 4457 case OPEN: 4458 // and OPEN, emit connection complete command 4459 hci_emit_connection_complete(addr, conn->con_handle, 0); 4460 return -1; // packet not sent to controller 4461 case RECEIVED_DISCONNECTION_COMPLETE: 4462 // create connection triggered in disconnect complete event, let's do it now 4463 break; 4464 case SEND_CREATE_CONNECTION: 4465 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4466 break; 4467 default: 4468 // otherwise, just ignore as it is already in the open process 4469 return -1; // packet not sent to controller 4470 } 4471 conn->state = SENT_CREATE_CONNECTION; 4472 4473 // track outgoing connection 4474 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4475 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4476 break; 4477 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4478 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4479 break; 4480 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4481 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4482 break; 4483 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4484 if (hci_stack->link_key_db) { 4485 reverse_bd_addr(&packet[3], addr); 4486 hci_stack->link_key_db->delete_link_key(addr); 4487 } 4488 break; 4489 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4490 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4491 reverse_bd_addr(&packet[3], addr); 4492 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4493 if (conn) { 4494 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4495 } 4496 break; 4497 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4498 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4499 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4500 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4501 reverse_bd_addr(&packet[3], addr); 4502 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4503 if (conn) { 4504 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4505 } 4506 break; 4507 4508 #ifdef ENABLE_SCO_OVER_HCI 4509 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4510 // setup_synchronous_connection? Voice setting at offset 22 4511 // TODO: compare to current setting if sco connection already active 4512 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4513 break; 4514 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4515 // accept_synchronus_connection? Voice setting at offset 18 4516 // TODO: compare to current setting if sco connection already active 4517 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4518 break; 4519 #endif 4520 #endif 4521 4522 #ifdef ENABLE_BLE 4523 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4524 hci_stack->le_random_address_set = 1; 4525 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4526 break; 4527 #ifdef ENABLE_LE_PERIPHERAL 4528 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4529 hci_stack->le_advertisements_active = packet[3] != 0; 4530 break; 4531 #endif 4532 #ifdef ENABLE_LE_CENTRAL 4533 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4534 // white list used? 4535 initiator_filter_policy = packet[7]; 4536 switch (initiator_filter_policy) { 4537 case 0: 4538 // whitelist not used 4539 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4540 break; 4541 case 1: 4542 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4543 break; 4544 default: 4545 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4546 break; 4547 } 4548 // track outgoing connection 4549 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4550 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4551 break; 4552 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4553 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4554 break; 4555 #endif 4556 #endif 4557 default: 4558 break; 4559 } 4560 4561 hci_stack->num_cmd_packets--; 4562 4563 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4564 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4565 } 4566 4567 // disconnect because of security block 4568 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4569 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4570 if (!connection) return; 4571 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4572 } 4573 4574 4575 // Configure Secure Simple Pairing 4576 4577 #ifdef ENABLE_CLASSIC 4578 4579 // enable will enable SSP during init 4580 void gap_ssp_set_enable(int enable){ 4581 hci_stack->ssp_enable = enable; 4582 } 4583 4584 static int hci_local_ssp_activated(void){ 4585 return gap_ssp_supported() && hci_stack->ssp_enable; 4586 } 4587 4588 // if set, BTstack will respond to io capability request using authentication requirement 4589 void gap_ssp_set_io_capability(int io_capability){ 4590 hci_stack->ssp_io_capability = io_capability; 4591 } 4592 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4593 hci_stack->ssp_authentication_requirement = authentication_requirement; 4594 } 4595 4596 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4597 void gap_ssp_set_auto_accept(int auto_accept){ 4598 hci_stack->ssp_auto_accept = auto_accept; 4599 } 4600 4601 void gap_secure_connections_enable(bool enable){ 4602 hci_stack->secure_connections_enable = enable; 4603 } 4604 4605 #endif 4606 4607 // va_list part of hci_send_cmd 4608 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4609 if (!hci_can_send_command_packet_now()){ 4610 log_error("hci_send_cmd called but cannot send packet now"); 4611 return 0; 4612 } 4613 4614 // for HCI INITIALIZATION 4615 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4616 hci_stack->last_cmd_opcode = cmd->opcode; 4617 4618 hci_reserve_packet_buffer(); 4619 uint8_t * packet = hci_stack->hci_packet_buffer; 4620 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4621 int err = hci_send_cmd_packet(packet, size); 4622 4623 // release packet buffer on error or for synchronous transport implementations 4624 if ((err < 0) || hci_transport_synchronous()){ 4625 hci_release_packet_buffer(); 4626 hci_emit_transport_packet_sent(); 4627 } 4628 4629 return err; 4630 } 4631 4632 /** 4633 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4634 */ 4635 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4636 va_list argptr; 4637 va_start(argptr, cmd); 4638 int res = hci_send_cmd_va_arg(cmd, argptr); 4639 va_end(argptr); 4640 return res; 4641 } 4642 4643 // Create various non-HCI events. 4644 // TODO: generalize, use table similar to hci_create_command 4645 4646 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4647 // dump packet 4648 if (dump) { 4649 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4650 } 4651 4652 // dispatch to all event handlers 4653 btstack_linked_list_iterator_t it; 4654 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4655 while (btstack_linked_list_iterator_has_next(&it)){ 4656 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4657 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4658 } 4659 } 4660 4661 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4662 if (!hci_stack->acl_packet_handler) return; 4663 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4664 } 4665 4666 #ifdef ENABLE_CLASSIC 4667 static void hci_notify_if_sco_can_send_now(void){ 4668 // notify SCO sender if waiting 4669 if (!hci_stack->sco_waiting_for_can_send_now) return; 4670 if (hci_can_send_sco_packet_now()){ 4671 hci_stack->sco_waiting_for_can_send_now = 0; 4672 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4673 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4674 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4675 } 4676 } 4677 4678 // parsing end emitting has been merged to reduce code size 4679 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4680 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4681 4682 uint8_t * eir_data; 4683 ad_context_t context; 4684 const uint8_t * name; 4685 uint8_t name_len; 4686 4687 if (size < 3) return; 4688 4689 int event_type = hci_event_packet_get_type(packet); 4690 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4691 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4692 4693 switch (event_type){ 4694 case HCI_EVENT_INQUIRY_RESULT: 4695 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4696 if (size != (3 + (num_responses * 14))) return; 4697 break; 4698 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4699 if (size != 257) return; 4700 if (num_responses != 1) return; 4701 break; 4702 default: 4703 return; 4704 } 4705 4706 // event[1] is set at the end 4707 int i; 4708 for (i=0; i<num_responses;i++){ 4709 memset(event, 0, sizeof(event)); 4710 event[0] = GAP_EVENT_INQUIRY_RESULT; 4711 uint8_t event_size = 18; // if name is not set by EIR 4712 4713 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4714 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4715 (void)memcpy(&event[9], 4716 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4717 3); // class of device 4718 (void)memcpy(&event[12], 4719 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4720 2); // clock offset 4721 4722 switch (event_type){ 4723 case HCI_EVENT_INQUIRY_RESULT: 4724 // 14,15,16,17 = 0, size 18 4725 break; 4726 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4727 event[14] = 1; 4728 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4729 // 16,17 = 0, size 18 4730 break; 4731 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4732 event[14] = 1; 4733 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4734 // EIR packets only contain a single inquiry response 4735 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4736 name = NULL; 4737 // Iterate over EIR data 4738 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4739 uint8_t data_type = ad_iterator_get_data_type(&context); 4740 uint8_t data_size = ad_iterator_get_data_len(&context); 4741 const uint8_t * data = ad_iterator_get_data(&context); 4742 // Prefer Complete Local Name over Shortend Local Name 4743 switch (data_type){ 4744 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4745 if (name) continue; 4746 /* fall through */ 4747 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4748 name = data; 4749 name_len = data_size; 4750 break; 4751 default: 4752 break; 4753 } 4754 } 4755 if (name){ 4756 event[16] = 1; 4757 // truncate name if needed 4758 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4759 event[17] = len; 4760 (void)memcpy(&event[18], name, len); 4761 event_size += len; 4762 } 4763 break; 4764 } 4765 event[1] = event_size - 2; 4766 hci_emit_event(event, event_size, 1); 4767 } 4768 } 4769 #endif 4770 4771 void hci_emit_state(void){ 4772 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4773 uint8_t event[3]; 4774 event[0] = BTSTACK_EVENT_STATE; 4775 event[1] = sizeof(event) - 2u; 4776 event[2] = hci_stack->state; 4777 hci_emit_event(event, sizeof(event), 1); 4778 } 4779 4780 #ifdef ENABLE_CLASSIC 4781 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4782 uint8_t event[13]; 4783 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4784 event[1] = sizeof(event) - 2; 4785 event[2] = status; 4786 little_endian_store_16(event, 3, con_handle); 4787 reverse_bd_addr(address, &event[5]); 4788 event[11] = 1; // ACL connection 4789 event[12] = 0; // encryption disabled 4790 hci_emit_event(event, sizeof(event), 1); 4791 } 4792 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4793 if (disable_l2cap_timeouts) return; 4794 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4795 uint8_t event[4]; 4796 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4797 event[1] = sizeof(event) - 2; 4798 little_endian_store_16(event, 2, conn->con_handle); 4799 hci_emit_event(event, sizeof(event), 1); 4800 } 4801 #endif 4802 4803 #ifdef ENABLE_BLE 4804 #ifdef ENABLE_LE_CENTRAL 4805 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){ 4806 uint8_t event[21]; 4807 event[0] = HCI_EVENT_LE_META; 4808 event[1] = sizeof(event) - 2u; 4809 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4810 event[3] = status; 4811 little_endian_store_16(event, 4, con_handle); 4812 event[6] = 0; // TODO: role 4813 event[7] = address_type; 4814 reverse_bd_addr(address, &event[8]); 4815 little_endian_store_16(event, 14, 0); // interval 4816 little_endian_store_16(event, 16, 0); // latency 4817 little_endian_store_16(event, 18, 0); // supervision timeout 4818 event[20] = 0; // master clock accuracy 4819 hci_emit_event(event, sizeof(event), 1); 4820 } 4821 #endif 4822 #endif 4823 4824 static void hci_emit_transport_packet_sent(void){ 4825 // notify upper stack that it might be possible to send again 4826 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4827 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4828 } 4829 4830 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4831 uint8_t event[6]; 4832 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4833 event[1] = sizeof(event) - 2u; 4834 event[2] = 0; // status = OK 4835 little_endian_store_16(event, 3, con_handle); 4836 event[5] = reason; 4837 hci_emit_event(event, sizeof(event), 1); 4838 } 4839 4840 static void hci_emit_nr_connections_changed(void){ 4841 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4842 uint8_t event[3]; 4843 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4844 event[1] = sizeof(event) - 2u; 4845 event[2] = nr_hci_connections(); 4846 hci_emit_event(event, sizeof(event), 1); 4847 } 4848 4849 static void hci_emit_hci_open_failed(void){ 4850 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4851 uint8_t event[2]; 4852 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4853 event[1] = sizeof(event) - 2u; 4854 hci_emit_event(event, sizeof(event), 1); 4855 } 4856 4857 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4858 log_info("hci_emit_dedicated_bonding_result %u ", status); 4859 uint8_t event[9]; 4860 int pos = 0; 4861 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4862 event[pos++] = sizeof(event) - 2u; 4863 event[pos++] = status; 4864 reverse_bd_addr(address, &event[pos]); 4865 hci_emit_event(event, sizeof(event), 1); 4866 } 4867 4868 4869 #ifdef ENABLE_CLASSIC 4870 4871 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4872 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4873 uint8_t event[5]; 4874 int pos = 0; 4875 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4876 event[pos++] = sizeof(event) - 2; 4877 little_endian_store_16(event, 2, con_handle); 4878 pos += 2; 4879 event[pos++] = level; 4880 hci_emit_event(event, sizeof(event), 1); 4881 } 4882 4883 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4884 if (!connection) return LEVEL_0; 4885 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4886 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4887 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4888 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4889 // LEVEL 4 always requires 128 bit encrytion key size 4890 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4891 security_level = LEVEL_3; 4892 } 4893 return security_level; 4894 } 4895 4896 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4897 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4898 uint8_t event[3]; 4899 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4900 event[1] = sizeof(event) - 2; 4901 event[2] = enabled; 4902 hci_emit_event(event, sizeof(event), 1); 4903 } 4904 4905 // query if remote side supports eSCO 4906 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4907 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4908 if (!connection) return 0; 4909 return (connection->remote_supported_features[0] & 1) != 0; 4910 } 4911 4912 static bool hci_ssp_supported(hci_connection_t * connection){ 4913 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4914 return (connection->bonding_flags & mask) == mask; 4915 } 4916 4917 // query if remote side supports SSP 4918 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4919 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4920 if (!connection) return 0; 4921 return hci_ssp_supported(connection) ? 1 : 0; 4922 } 4923 4924 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4925 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4926 } 4927 4928 // GAP API 4929 /** 4930 * @bbrief enable/disable bonding. default is enabled 4931 * @praram enabled 4932 */ 4933 void gap_set_bondable_mode(int enable){ 4934 hci_stack->bondable = enable ? 1 : 0; 4935 } 4936 /** 4937 * @brief Get bondable mode. 4938 * @return 1 if bondable 4939 */ 4940 int gap_get_bondable_mode(void){ 4941 return hci_stack->bondable; 4942 } 4943 4944 /** 4945 * @brief map link keys to security levels 4946 */ 4947 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4948 switch (link_key_type){ 4949 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4950 return LEVEL_4; 4951 case COMBINATION_KEY: 4952 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4953 return LEVEL_3; 4954 default: 4955 return LEVEL_2; 4956 } 4957 } 4958 4959 /** 4960 * @brief map link keys to secure connection yes/no 4961 */ 4962 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4963 switch (link_key_type){ 4964 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4965 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4966 return 1; 4967 default: 4968 return 0; 4969 } 4970 } 4971 4972 /** 4973 * @brief map link keys to authenticated 4974 */ 4975 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4976 switch (link_key_type){ 4977 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4978 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4979 return 1; 4980 default: 4981 return 0; 4982 } 4983 } 4984 4985 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4986 log_info("gap_mitm_protection_required_for_security_level %u", level); 4987 return level > LEVEL_2; 4988 } 4989 4990 /** 4991 * @brief get current security level 4992 */ 4993 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4994 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4995 if (!connection) return LEVEL_0; 4996 return gap_security_level_for_connection(connection); 4997 } 4998 4999 /** 5000 * @brief request connection to device to 5001 * @result GAP_AUTHENTICATION_RESULT 5002 */ 5003 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5004 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5005 if (!connection){ 5006 hci_emit_security_level(con_handle, LEVEL_0); 5007 return; 5008 } 5009 gap_security_level_t current_level = gap_security_level(con_handle); 5010 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5011 requested_level, connection->requested_security_level, current_level); 5012 5013 // assumption: earlier requested security higher than current level => security request is active 5014 if (current_level < connection->requested_security_level){ 5015 if (connection->requested_security_level < requested_level){ 5016 // increase requested level as new level is higher 5017 5018 // TODO: handle re-authentication when done 5019 5020 connection->requested_security_level = requested_level; 5021 } 5022 return; 5023 } 5024 5025 // no request active, notify if security sufficient 5026 if (requested_level <= current_level){ 5027 hci_emit_security_level(con_handle, current_level); 5028 return; 5029 } 5030 5031 // start pairing to increase security level 5032 connection->requested_security_level = requested_level; 5033 5034 #if 0 5035 // sending encryption request without a link key results in an error. 5036 // TODO: figure out how to use it properly 5037 5038 // would enabling ecnryption suffice (>= LEVEL_2)? 5039 if (hci_stack->link_key_db){ 5040 link_key_type_t link_key_type; 5041 link_key_t link_key; 5042 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 5043 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 5044 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 5045 return; 5046 } 5047 } 5048 } 5049 #endif 5050 5051 // start to authenticate connection if not already active 5052 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5053 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5054 hci_run(); 5055 } 5056 5057 /** 5058 * @brief start dedicated bonding with device. disconnect after bonding 5059 * @param device 5060 * @param request MITM protection 5061 * @result GAP_DEDICATED_BONDING_COMPLETE 5062 */ 5063 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5064 5065 // create connection state machine 5066 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5067 5068 if (!connection){ 5069 return BTSTACK_MEMORY_ALLOC_FAILED; 5070 } 5071 5072 // delete linkn key 5073 gap_drop_link_key_for_bd_addr(device); 5074 5075 // configure LEVEL_2/3, dedicated bonding 5076 connection->state = SEND_CREATE_CONNECTION; 5077 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5078 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5079 connection->bonding_flags = BONDING_DEDICATED; 5080 5081 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5082 5083 // handle: connnection failure (connection complete != ok) 5084 // handle: authentication failure 5085 // handle: disconnect on done 5086 5087 hci_run(); 5088 5089 return 0; 5090 } 5091 #endif 5092 5093 void gap_set_local_name(const char * local_name){ 5094 hci_stack->local_name = local_name; 5095 } 5096 5097 5098 #ifdef ENABLE_BLE 5099 5100 #ifdef ENABLE_LE_CENTRAL 5101 void gap_start_scan(void){ 5102 hci_stack->le_scanning_enabled = true; 5103 hci_run(); 5104 } 5105 5106 void gap_stop_scan(void){ 5107 hci_stack->le_scanning_enabled = false; 5108 hci_run(); 5109 } 5110 5111 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5112 hci_stack->le_scan_type = scan_type; 5113 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5114 hci_stack->le_scan_interval = scan_interval; 5115 hci_stack->le_scan_window = scan_window; 5116 hci_stack->le_scanning_param_update = true; 5117 hci_run(); 5118 } 5119 5120 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5121 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5122 } 5123 5124 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5125 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5126 if (!conn){ 5127 // disallow if le connection is already outgoing 5128 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5129 log_error("le connection already active"); 5130 return ERROR_CODE_COMMAND_DISALLOWED; 5131 } 5132 5133 log_info("gap_connect: no connection exists yet, creating context"); 5134 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5135 if (!conn){ 5136 // notify client that alloc failed 5137 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5138 log_info("gap_connect: failed to alloc hci_connection_t"); 5139 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5140 } 5141 5142 // set le connecting state 5143 if (hci_is_le_connection_type(addr_type)){ 5144 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5145 } 5146 5147 conn->state = SEND_CREATE_CONNECTION; 5148 log_info("gap_connect: send create connection next"); 5149 hci_run(); 5150 return ERROR_CODE_SUCCESS; 5151 } 5152 5153 if (!hci_is_le_connection(conn) || 5154 (conn->state == SEND_CREATE_CONNECTION) || 5155 (conn->state == SENT_CREATE_CONNECTION)) { 5156 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5157 log_error("gap_connect: classic connection or connect is already being created"); 5158 return GATT_CLIENT_IN_WRONG_STATE; 5159 } 5160 5161 // check if connection was just disconnected 5162 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5163 log_info("gap_connect: send create connection (again)"); 5164 conn->state = SEND_CREATE_CONNECTION; 5165 hci_run(); 5166 return ERROR_CODE_SUCCESS; 5167 } 5168 5169 log_info("gap_connect: context exists with state %u", conn->state); 5170 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5171 hci_run(); 5172 return ERROR_CODE_SUCCESS; 5173 } 5174 5175 // @assumption: only a single outgoing LE Connection exists 5176 static hci_connection_t * gap_get_outgoing_connection(void){ 5177 btstack_linked_item_t *it; 5178 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5179 hci_connection_t * conn = (hci_connection_t *) it; 5180 if (!hci_is_le_connection(conn)) continue; 5181 switch (conn->state){ 5182 case SEND_CREATE_CONNECTION: 5183 case SENT_CREATE_CONNECTION: 5184 case SENT_CANCEL_CONNECTION: 5185 return conn; 5186 default: 5187 break; 5188 }; 5189 } 5190 return NULL; 5191 } 5192 5193 uint8_t gap_connect_cancel(void){ 5194 hci_connection_t * conn = gap_get_outgoing_connection(); 5195 if (!conn) return 0; 5196 switch (conn->state){ 5197 case SEND_CREATE_CONNECTION: 5198 // skip sending create connection and emit event instead 5199 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5200 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5201 btstack_memory_hci_connection_free( conn ); 5202 break; 5203 case SENT_CREATE_CONNECTION: 5204 // request to send cancel connection 5205 conn->state = SEND_CANCEL_CONNECTION; 5206 hci_run(); 5207 break; 5208 default: 5209 break; 5210 } 5211 return 0; 5212 } 5213 #endif 5214 5215 #ifdef ENABLE_LE_CENTRAL 5216 /** 5217 * @brief Set connection parameters for outgoing connections 5218 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5219 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5220 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5221 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5222 * @param conn_latency, default: 4 5223 * @param supervision_timeout (unit: 10ms), default: 720 ms 5224 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5225 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5226 */ 5227 5228 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5229 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5230 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5231 hci_stack->le_connection_scan_interval = conn_scan_interval; 5232 hci_stack->le_connection_scan_window = conn_scan_window; 5233 hci_stack->le_connection_interval_min = conn_interval_min; 5234 hci_stack->le_connection_interval_max = conn_interval_max; 5235 hci_stack->le_connection_latency = conn_latency; 5236 hci_stack->le_supervision_timeout = supervision_timeout; 5237 hci_stack->le_minimum_ce_length = min_ce_length; 5238 hci_stack->le_maximum_ce_length = max_ce_length; 5239 } 5240 #endif 5241 5242 /** 5243 * @brief Updates the connection parameters for a given LE connection 5244 * @param handle 5245 * @param conn_interval_min (unit: 1.25ms) 5246 * @param conn_interval_max (unit: 1.25ms) 5247 * @param conn_latency 5248 * @param supervision_timeout (unit: 10ms) 5249 * @returns 0 if ok 5250 */ 5251 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5252 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5253 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5254 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5255 connection->le_conn_interval_min = conn_interval_min; 5256 connection->le_conn_interval_max = conn_interval_max; 5257 connection->le_conn_latency = conn_latency; 5258 connection->le_supervision_timeout = supervision_timeout; 5259 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5260 hci_run(); 5261 return 0; 5262 } 5263 5264 /** 5265 * @brief Request an update of the connection parameter for a given LE connection 5266 * @param handle 5267 * @param conn_interval_min (unit: 1.25ms) 5268 * @param conn_interval_max (unit: 1.25ms) 5269 * @param conn_latency 5270 * @param supervision_timeout (unit: 10ms) 5271 * @returns 0 if ok 5272 */ 5273 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5274 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5275 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5276 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5277 connection->le_conn_interval_min = conn_interval_min; 5278 connection->le_conn_interval_max = conn_interval_max; 5279 connection->le_conn_latency = conn_latency; 5280 connection->le_supervision_timeout = supervision_timeout; 5281 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5282 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5283 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5284 return 0; 5285 } 5286 5287 #ifdef ENABLE_LE_PERIPHERAL 5288 5289 /** 5290 * @brief Set Advertisement Data 5291 * @param advertising_data_length 5292 * @param advertising_data (max 31 octets) 5293 * @note data is not copied, pointer has to stay valid 5294 */ 5295 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5296 hci_stack->le_advertisements_data_len = advertising_data_length; 5297 hci_stack->le_advertisements_data = advertising_data; 5298 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5299 hci_run(); 5300 } 5301 5302 /** 5303 * @brief Set Scan Response Data 5304 * @param advertising_data_length 5305 * @param advertising_data (max 31 octets) 5306 * @note data is not copied, pointer has to stay valid 5307 */ 5308 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5309 hci_stack->le_scan_response_data_len = scan_response_data_length; 5310 hci_stack->le_scan_response_data = scan_response_data; 5311 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5312 hci_run(); 5313 } 5314 5315 /** 5316 * @brief Set Advertisement Parameters 5317 * @param adv_int_min 5318 * @param adv_int_max 5319 * @param adv_type 5320 * @param direct_address_type 5321 * @param direct_address 5322 * @param channel_map 5323 * @param filter_policy 5324 * 5325 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5326 */ 5327 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5328 uint8_t direct_address_typ, bd_addr_t direct_address, 5329 uint8_t channel_map, uint8_t filter_policy) { 5330 5331 hci_stack->le_advertisements_interval_min = adv_int_min; 5332 hci_stack->le_advertisements_interval_max = adv_int_max; 5333 hci_stack->le_advertisements_type = adv_type; 5334 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5335 hci_stack->le_advertisements_channel_map = channel_map; 5336 hci_stack->le_advertisements_filter_policy = filter_policy; 5337 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5338 6); 5339 5340 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5341 hci_run(); 5342 } 5343 5344 /** 5345 * @brief Enable/Disable Advertisements 5346 * @param enabled 5347 */ 5348 void gap_advertisements_enable(int enabled){ 5349 hci_stack->le_advertisements_enabled = enabled != 0; 5350 hci_update_advertisements_enabled_for_current_roles(); 5351 hci_run(); 5352 } 5353 5354 #endif 5355 5356 void hci_le_set_own_address_type(uint8_t own_address_type){ 5357 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5358 if (own_address_type == hci_stack->le_own_addr_type) return; 5359 hci_stack->le_own_addr_type = own_address_type; 5360 5361 #ifdef ENABLE_LE_PERIPHERAL 5362 // update advertisement parameters, too 5363 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5364 hci_run(); 5365 #endif 5366 #ifdef ENABLE_LE_CENTRAL 5367 // note: we don't update scan parameters or modify ongoing connection attempts 5368 #endif 5369 } 5370 5371 #endif 5372 5373 uint8_t gap_disconnect(hci_con_handle_t handle){ 5374 hci_connection_t * conn = hci_connection_for_handle(handle); 5375 if (!conn){ 5376 hci_emit_disconnection_complete(handle, 0); 5377 return 0; 5378 } 5379 // ignore if already disconnected 5380 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5381 return 0; 5382 } 5383 conn->state = SEND_DISCONNECT; 5384 hci_run(); 5385 return 0; 5386 } 5387 5388 int gap_read_rssi(hci_con_handle_t con_handle){ 5389 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5390 if (hci_connection == NULL) return 0; 5391 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5392 hci_run(); 5393 return 1; 5394 } 5395 5396 /** 5397 * @brief Get connection type 5398 * @param con_handle 5399 * @result connection_type 5400 */ 5401 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5402 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5403 if (!conn) return GAP_CONNECTION_INVALID; 5404 switch (conn->address_type){ 5405 case BD_ADDR_TYPE_LE_PUBLIC: 5406 case BD_ADDR_TYPE_LE_RANDOM: 5407 return GAP_CONNECTION_LE; 5408 case BD_ADDR_TYPE_SCO: 5409 return GAP_CONNECTION_SCO; 5410 case BD_ADDR_TYPE_ACL: 5411 return GAP_CONNECTION_ACL; 5412 default: 5413 return GAP_CONNECTION_INVALID; 5414 } 5415 } 5416 5417 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5418 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5419 if (!conn) return HCI_ROLE_INVALID; 5420 return (hci_role_t) conn->role; 5421 } 5422 5423 5424 #ifdef ENABLE_CLASSIC 5425 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5426 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5427 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5428 conn->request_role = role; 5429 hci_run(); 5430 return ERROR_CODE_SUCCESS; 5431 } 5432 #endif 5433 5434 #ifdef ENABLE_BLE 5435 5436 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){ 5437 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5438 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5439 5440 conn->le_phy_update_all_phys = all_phys; 5441 conn->le_phy_update_tx_phys = tx_phys; 5442 conn->le_phy_update_rx_phys = rx_phys; 5443 conn->le_phy_update_phy_options = phy_options; 5444 5445 hci_run(); 5446 5447 return 0; 5448 } 5449 5450 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5451 // check if already in list 5452 btstack_linked_list_iterator_t it; 5453 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5454 while (btstack_linked_list_iterator_has_next(&it)) { 5455 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5456 if (entry->address_type != address_type) { 5457 continue; 5458 } 5459 if (memcmp(entry->address, address, 6) != 0) { 5460 continue; 5461 } 5462 // disallow if already scheduled to add 5463 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5464 return ERROR_CODE_COMMAND_DISALLOWED; 5465 } 5466 // still on controller, but scheduled to remove -> re-add 5467 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5468 return ERROR_CODE_SUCCESS; 5469 } 5470 // alloc and add to list 5471 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5472 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5473 entry->address_type = address_type; 5474 (void)memcpy(entry->address, address, 6); 5475 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5476 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5477 return ERROR_CODE_SUCCESS; 5478 } 5479 5480 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5481 btstack_linked_list_iterator_t it; 5482 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5483 while (btstack_linked_list_iterator_has_next(&it)){ 5484 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5485 if (entry->address_type != address_type) { 5486 continue; 5487 } 5488 if (memcmp(entry->address, address, 6) != 0) { 5489 continue; 5490 } 5491 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5492 // remove from controller if already present 5493 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5494 } else { 5495 // directly remove entry from whitelist 5496 btstack_linked_list_iterator_remove(&it); 5497 btstack_memory_whitelist_entry_free(entry); 5498 } 5499 return ERROR_CODE_SUCCESS; 5500 } 5501 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5502 } 5503 5504 static void hci_whitelist_clear(void){ 5505 btstack_linked_list_iterator_t it; 5506 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5507 while (btstack_linked_list_iterator_has_next(&it)){ 5508 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5509 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5510 // remove from controller if already present 5511 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5512 continue; 5513 } 5514 // directly remove entry from whitelist 5515 btstack_linked_list_iterator_remove(&it); 5516 btstack_memory_whitelist_entry_free(entry); 5517 } 5518 } 5519 5520 /** 5521 * @brief Clear Whitelist 5522 * @returns 0 if ok 5523 */ 5524 uint8_t gap_whitelist_clear(void){ 5525 hci_whitelist_clear(); 5526 hci_run(); 5527 return ERROR_CODE_SUCCESS; 5528 } 5529 5530 /** 5531 * @brief Add Device to Whitelist 5532 * @param address_typ 5533 * @param address 5534 * @returns 0 if ok 5535 */ 5536 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5537 uint8_t status = hci_whitelist_add(address_type, address); 5538 if (status){ 5539 return status; 5540 } 5541 hci_run(); 5542 return ERROR_CODE_SUCCESS; 5543 } 5544 5545 /** 5546 * @brief Remove Device from Whitelist 5547 * @param address_typ 5548 * @param address 5549 * @returns 0 if ok 5550 */ 5551 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5552 uint8_t status = hci_whitelist_remove(address_type, address); 5553 if (status){ 5554 return status; 5555 } 5556 hci_run(); 5557 return ERROR_CODE_SUCCESS; 5558 } 5559 5560 #ifdef ENABLE_LE_CENTRAL 5561 /** 5562 * @brief Connect with Whitelist 5563 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5564 * @returns - if ok 5565 */ 5566 uint8_t gap_connect_with_whitelist(void){ 5567 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5568 return ERROR_CODE_COMMAND_DISALLOWED; 5569 } 5570 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5571 hci_run(); 5572 return ERROR_CODE_SUCCESS; 5573 } 5574 5575 /** 5576 * @brief Auto Connection Establishment - Start Connecting to device 5577 * @param address_typ 5578 * @param address 5579 * @returns 0 if ok 5580 */ 5581 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5582 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5583 return ERROR_CODE_COMMAND_DISALLOWED; 5584 } 5585 5586 uint8_t status = hci_whitelist_add(address_type, address); 5587 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5588 return status; 5589 } 5590 5591 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5592 5593 hci_run(); 5594 return ERROR_CODE_SUCCESS; 5595 } 5596 5597 /** 5598 * @brief Auto Connection Establishment - Stop Connecting to device 5599 * @param address_typ 5600 * @param address 5601 * @returns 0 if ok 5602 */ 5603 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5604 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5605 return ERROR_CODE_COMMAND_DISALLOWED; 5606 } 5607 5608 hci_whitelist_remove(address_type, address); 5609 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5610 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5611 } 5612 hci_run(); 5613 return 0; 5614 } 5615 5616 /** 5617 * @brief Auto Connection Establishment - Stop everything 5618 * @note Convenience function to stop all active auto connection attempts 5619 */ 5620 uint8_t gap_auto_connection_stop_all(void){ 5621 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5622 return ERROR_CODE_COMMAND_DISALLOWED; 5623 } 5624 hci_whitelist_clear(); 5625 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5626 hci_run(); 5627 return ERROR_CODE_SUCCESS; 5628 } 5629 5630 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5631 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5632 if (!conn) return 0; 5633 return conn->le_connection_interval; 5634 } 5635 #endif 5636 #endif 5637 5638 #ifdef ENABLE_CLASSIC 5639 /** 5640 * @brief Set Extended Inquiry Response data 5641 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5642 * @note has to be done before stack starts up 5643 */ 5644 void gap_set_extended_inquiry_response(const uint8_t * data){ 5645 hci_stack->eir_data = data; 5646 } 5647 5648 /** 5649 * @brief Start GAP Classic Inquiry 5650 * @param duration in 1.28s units 5651 * @return 0 if ok 5652 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5653 */ 5654 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5655 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5656 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5657 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5658 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5659 } 5660 hci_stack->inquiry_state = duration_in_1280ms_units; 5661 hci_run(); 5662 return 0; 5663 } 5664 5665 /** 5666 * @brief Stop GAP Classic Inquiry 5667 * @returns 0 if ok 5668 */ 5669 int gap_inquiry_stop(void){ 5670 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5671 // emit inquiry complete event, before it even started 5672 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5673 hci_emit_event(event, sizeof(event), 1); 5674 return 0; 5675 } 5676 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5677 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5678 hci_run(); 5679 return 0; 5680 } 5681 5682 5683 /** 5684 * @brief Remote Name Request 5685 * @param addr 5686 * @param page_scan_repetition_mode 5687 * @param clock_offset only used when bit 15 is set 5688 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5689 */ 5690 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5691 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5692 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5693 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5694 hci_stack->remote_name_clock_offset = clock_offset; 5695 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5696 hci_run(); 5697 return 0; 5698 } 5699 5700 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5701 hci_stack->gap_pairing_state = state; 5702 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5703 hci_run(); 5704 return 0; 5705 } 5706 5707 /** 5708 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5709 * @param addr 5710 * @param pin_data 5711 * @param pin_len 5712 * @return 0 if ok 5713 */ 5714 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5715 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5716 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5717 hci_stack->gap_pairing_pin_len = pin_len; 5718 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5719 } 5720 5721 /** 5722 * @brief Legacy Pairing Pin Code Response 5723 * @param addr 5724 * @param pin 5725 * @return 0 if ok 5726 */ 5727 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5728 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5729 } 5730 5731 /** 5732 * @brief Abort Legacy Pairing 5733 * @param addr 5734 * @param pin 5735 * @return 0 if ok 5736 */ 5737 int gap_pin_code_negative(bd_addr_t addr){ 5738 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5739 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5740 } 5741 5742 /** 5743 * @brief SSP Passkey Response 5744 * @param addr 5745 * @param passkey 5746 * @return 0 if ok 5747 */ 5748 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5749 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5750 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5751 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5752 } 5753 5754 /** 5755 * @brief Abort SSP Passkey Entry/Pairing 5756 * @param addr 5757 * @param pin 5758 * @return 0 if ok 5759 */ 5760 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5761 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5762 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5763 } 5764 5765 /** 5766 * @brief Accept SSP Numeric Comparison 5767 * @param addr 5768 * @param passkey 5769 * @return 0 if ok 5770 */ 5771 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5772 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5773 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5774 } 5775 5776 /** 5777 * @brief Abort SSP Numeric Comparison/Pairing 5778 * @param addr 5779 * @param pin 5780 * @return 0 if ok 5781 */ 5782 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5783 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5784 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5785 } 5786 5787 /** 5788 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5789 * @param inquiry_mode see bluetooth_defines.h 5790 */ 5791 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5792 hci_stack->inquiry_mode = mode; 5793 } 5794 5795 /** 5796 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5797 */ 5798 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5799 hci_stack->sco_voice_setting = voice_setting; 5800 } 5801 5802 /** 5803 * @brief Get SCO Voice Setting 5804 * @return current voice setting 5805 */ 5806 uint16_t hci_get_sco_voice_setting(void){ 5807 return hci_stack->sco_voice_setting; 5808 } 5809 5810 static int hci_have_usb_transport(void){ 5811 if (!hci_stack->hci_transport) return 0; 5812 const char * transport_name = hci_stack->hci_transport->name; 5813 if (!transport_name) return 0; 5814 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5815 } 5816 5817 /** @brief Get SCO packet length for current SCO Voice setting 5818 * @note Using SCO packets of the exact length is required for USB transfer 5819 * @return Length of SCO packets in bytes (not audio frames) 5820 */ 5821 int hci_get_sco_packet_length(void){ 5822 int sco_packet_length = 0; 5823 5824 #ifdef ENABLE_SCO_OVER_HCI 5825 5826 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5827 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5828 5829 if (hci_have_usb_transport()){ 5830 // see Core Spec for H2 USB Transfer. 5831 // 3 byte SCO header + 24 bytes per connection 5832 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5833 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5834 } else { 5835 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5836 sco_packet_length = 3 + 60 * multiplier; 5837 // assert that it still fits inside an SCO buffer 5838 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5839 sco_packet_length = 3 + 60; 5840 } 5841 } 5842 #endif 5843 return sco_packet_length; 5844 } 5845 5846 /** 5847 * @brief Sets the master/slave policy 5848 * @param policy (0: attempt to become master, 1: let connecting device decide) 5849 */ 5850 void hci_set_master_slave_policy(uint8_t policy){ 5851 hci_stack->master_slave_policy = policy; 5852 } 5853 5854 #endif 5855 5856 HCI_STATE hci_get_state(void){ 5857 return hci_stack->state; 5858 } 5859 5860 #ifdef ENABLE_CLASSIC 5861 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5862 hci_stack->gap_classic_accept_callback = accept_callback; 5863 } 5864 #endif 5865 5866 /** 5867 * @brief Set callback for Bluetooth Hardware Error 5868 */ 5869 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5870 hci_stack->hardware_error_callback = fn; 5871 } 5872 5873 void hci_disconnect_all(void){ 5874 btstack_linked_list_iterator_t it; 5875 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5876 while (btstack_linked_list_iterator_has_next(&it)){ 5877 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5878 if (con->state == SENT_DISCONNECT) continue; 5879 con->state = SEND_DISCONNECT; 5880 } 5881 hci_run(); 5882 } 5883 5884 uint16_t hci_get_manufacturer(void){ 5885 return hci_stack->manufacturer; 5886 } 5887 5888 #ifdef ENABLE_BLE 5889 5890 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5891 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5892 if (!hci_con) return NULL; 5893 return &hci_con->sm_connection; 5894 } 5895 5896 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5897 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5898 5899 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5900 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5901 if (hci_connection == NULL) return 0; 5902 if (hci_is_le_connection(hci_connection)){ 5903 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5904 if (sm_conn->sm_connection_encrypted) { 5905 return sm_conn->sm_actual_encryption_key_size; 5906 } 5907 } 5908 #ifdef ENABLE_CLASSIC 5909 else { 5910 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5911 return hci_connection->encryption_key_size; 5912 } 5913 } 5914 #endif 5915 return 0; 5916 } 5917 5918 int gap_authenticated(hci_con_handle_t con_handle){ 5919 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5920 if (hci_connection == NULL) return 0; 5921 5922 switch (hci_connection->address_type){ 5923 case BD_ADDR_TYPE_LE_PUBLIC: 5924 case BD_ADDR_TYPE_LE_RANDOM: 5925 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5926 return hci_connection->sm_connection.sm_connection_authenticated; 5927 #ifdef ENABLE_CLASSIC 5928 case BD_ADDR_TYPE_SCO: 5929 case BD_ADDR_TYPE_ACL: 5930 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5931 #endif 5932 default: 5933 return 0; 5934 } 5935 } 5936 5937 int gap_secure_connection(hci_con_handle_t con_handle){ 5938 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5939 if (hci_connection == NULL) return 0; 5940 5941 switch (hci_connection->address_type){ 5942 case BD_ADDR_TYPE_LE_PUBLIC: 5943 case BD_ADDR_TYPE_LE_RANDOM: 5944 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5945 return hci_connection->sm_connection.sm_connection_sc; 5946 #ifdef ENABLE_CLASSIC 5947 case BD_ADDR_TYPE_SCO: 5948 case BD_ADDR_TYPE_ACL: 5949 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5950 #endif 5951 default: 5952 return 0; 5953 } 5954 } 5955 5956 bool gap_bonded(hci_con_handle_t con_handle){ 5957 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5958 if (hci_connection == NULL) return 0; 5959 5960 link_key_t link_key; 5961 link_key_type_t link_key_type; 5962 switch (hci_connection->address_type){ 5963 case BD_ADDR_TYPE_LE_PUBLIC: 5964 case BD_ADDR_TYPE_LE_RANDOM: 5965 return hci_connection->sm_connection.sm_le_db_index >= 0; 5966 #ifdef ENABLE_CLASSIC 5967 case BD_ADDR_TYPE_SCO: 5968 case BD_ADDR_TYPE_ACL: 5969 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 5970 #endif 5971 default: 5972 return false; 5973 } 5974 } 5975 5976 5977 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5978 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5979 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5980 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5981 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5982 return sm_conn->sm_connection_authorization_state; 5983 } 5984 #endif 5985 5986 #ifdef ENABLE_CLASSIC 5987 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){ 5988 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5989 if (!conn) return GAP_CONNECTION_INVALID; 5990 conn->sniff_min_interval = sniff_min_interval; 5991 conn->sniff_max_interval = sniff_max_interval; 5992 conn->sniff_attempt = sniff_attempt; 5993 conn->sniff_timeout = sniff_timeout; 5994 hci_run(); 5995 return 0; 5996 } 5997 5998 /** 5999 * @brief Exit Sniff mode 6000 * @param con_handle 6001 @ @return 0 if ok 6002 */ 6003 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6004 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6005 if (!conn) return GAP_CONNECTION_INVALID; 6006 conn->sniff_min_interval = 0xffff; 6007 hci_run(); 6008 return 0; 6009 } 6010 #endif 6011 6012 void hci_halting_defer(void){ 6013 if (hci_stack->state != HCI_STATE_HALTING) return; 6014 switch (hci_stack->substate){ 6015 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6016 case HCI_HALTING_CLOSE: 6017 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6018 break; 6019 default: 6020 break; 6021 } 6022 } 6023 6024 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6025 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6026 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6027 if (le_device_db_index >= le_device_db_max_count()) return; 6028 uint8_t offset = le_device_db_index >> 3; 6029 uint8_t mask = 1 << (le_device_db_index & 7); 6030 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6031 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6032 // note: go back to remove entries, otherwise, a remove + add will skip the add 6033 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6034 } 6035 } 6036 6037 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6038 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6039 if (le_device_db_index >= le_device_db_max_count()) return; 6040 uint8_t offset = le_device_db_index >> 3; 6041 uint8_t mask = 1 << (le_device_db_index & 7); 6042 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6043 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6044 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6045 } 6046 } 6047 6048 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6049 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6050 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6051 } 6052 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6053 // restart le resolving list update 6054 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6055 } 6056 return ERROR_CODE_SUCCESS; 6057 } 6058 #endif 6059 6060 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6061 void hci_setup_test_connections_fuzz(void){ 6062 hci_connection_t * conn; 6063 6064 // default address: 66:55:44:33:00:01 6065 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6066 6067 // setup Controller info 6068 hci_stack->num_cmd_packets = 255; 6069 hci_stack->acl_packets_total_num = 255; 6070 6071 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6072 addr[5] = 0x01; 6073 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6074 conn->con_handle = addr[5]; 6075 conn->role = HCI_ROLE_SLAVE; 6076 conn->state = RECEIVED_CONNECTION_REQUEST; 6077 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6078 6079 // setup incoming Classic SCO connection with con handle 0x0002 6080 addr[5] = 0x02; 6081 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6082 conn->con_handle = addr[5]; 6083 conn->role = HCI_ROLE_SLAVE; 6084 conn->state = RECEIVED_CONNECTION_REQUEST; 6085 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6086 6087 // setup ready Classic ACL connection with con handle 0x0003 6088 addr[5] = 0x03; 6089 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6090 conn->con_handle = addr[5]; 6091 conn->role = HCI_ROLE_SLAVE; 6092 conn->state = OPEN; 6093 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6094 6095 // setup ready Classic SCO connection with con handle 0x0004 6096 addr[5] = 0x04; 6097 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6098 conn->con_handle = addr[5]; 6099 conn->role = HCI_ROLE_SLAVE; 6100 conn->state = OPEN; 6101 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6102 6103 // setup ready LE ACL connection with con handle 0x005 and public address 6104 addr[5] = 0x05; 6105 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6106 conn->con_handle = addr[5]; 6107 conn->role = HCI_ROLE_SLAVE; 6108 conn->state = OPEN; 6109 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6110 } 6111 6112 void hci_free_connections_fuzz(void){ 6113 btstack_linked_list_iterator_t it; 6114 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6115 while (btstack_linked_list_iterator_has_next(&it)){ 6116 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6117 btstack_linked_list_iterator_remove(&it); 6118 btstack_memory_hci_connection_free(con); 6119 } 6120 } 6121 void hci_simulate_working_fuzz(void){ 6122 hci_init_done(); 6123 hci_stack->num_cmd_packets = 255; 6124 } 6125 #endif 6126