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