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