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