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