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