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->address_type = addr_type; 198 conn->con_handle = 0xffff; 199 conn->authentication_flags = AUTH_FLAGS_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 204 btstack_run_loop_set_timer_context(&conn->timeout, conn); 205 hci_connection_timestamp(conn); 206 #endif 207 conn->acl_recombination_length = 0; 208 conn->acl_recombination_pos = 0; 209 conn->num_packets_sent = 0; 210 211 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 212 #ifdef ENABLE_BLE 213 conn->le_phy_update_all_phys = 0xff; 214 #endif 215 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 216 conn->le_max_tx_octets = 27; 217 #endif 218 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 219 return conn; 220 } 221 222 223 /** 224 * get le connection parameter range 225 * 226 * @return le connection parameter range struct 227 */ 228 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 229 *range = hci_stack->le_connection_parameter_range; 230 } 231 232 /** 233 * set le connection parameter range 234 * 235 */ 236 237 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 238 hci_stack->le_connection_parameter_range = *range; 239 } 240 241 /** 242 * @brief Test if connection parameters are inside in existing rage 243 * @param conn_interval_min (unit: 1.25ms) 244 * @param conn_interval_max (unit: 1.25ms) 245 * @param conn_latency 246 * @param supervision_timeout (unit: 10ms) 247 * @returns 1 if included 248 */ 249 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){ 250 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 251 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 252 253 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 254 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 255 256 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 257 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 258 259 return 1; 260 } 261 262 /** 263 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 264 * @note: default: 1 265 * @param max_peripheral_connections 266 */ 267 #ifdef ENABLE_LE_PERIPHERAL 268 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 269 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 270 } 271 #endif 272 273 /** 274 * get hci connections iterator 275 * 276 * @return hci connections iterator 277 */ 278 279 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 280 btstack_linked_list_iterator_init(it, &hci_stack->connections); 281 } 282 283 /** 284 * get connection for a given handle 285 * 286 * @return connection OR NULL, if not found 287 */ 288 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 289 btstack_linked_list_iterator_t it; 290 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 291 while (btstack_linked_list_iterator_has_next(&it)){ 292 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 293 if ( item->con_handle == con_handle ) { 294 return item; 295 } 296 } 297 return NULL; 298 } 299 300 /** 301 * get connection for given address 302 * 303 * @return connection OR NULL, if not found 304 */ 305 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 306 btstack_linked_list_iterator_t it; 307 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 308 while (btstack_linked_list_iterator_has_next(&it)){ 309 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 310 if (connection->address_type != addr_type) continue; 311 if (memcmp(addr, connection->address, 6) != 0) continue; 312 return connection; 313 } 314 return NULL; 315 } 316 317 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 318 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 319 } 320 321 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 322 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 323 } 324 325 #ifdef ENABLE_CLASSIC 326 327 #ifdef ENABLE_SCO_OVER_HCI 328 static int hci_number_sco_connections(void){ 329 int connections = 0; 330 btstack_linked_list_iterator_t it; 331 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 332 while (btstack_linked_list_iterator_has_next(&it)){ 333 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 334 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 335 connections++; 336 } 337 return connections; 338 } 339 #endif 340 341 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 342 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 343 #ifdef HAVE_EMBEDDED_TICK 344 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 345 // connections might be timed out 346 hci_emit_l2cap_check_timeout(connection); 347 } 348 #else 349 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 350 // connections might be timed out 351 hci_emit_l2cap_check_timeout(connection); 352 } 353 #endif 354 } 355 356 static void hci_connection_timestamp(hci_connection_t *connection){ 357 #ifdef HAVE_EMBEDDED_TICK 358 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 359 #else 360 connection->timestamp = btstack_run_loop_get_time_ms(); 361 #endif 362 } 363 364 /** 365 * add authentication flags and reset timer 366 * @note: assumes classic connection 367 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 368 */ 369 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 370 bd_addr_t addr; 371 reverse_bd_addr(bd_addr, addr); 372 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 373 if (conn) { 374 connectionSetAuthenticationFlags(conn, flags); 375 hci_connection_timestamp(conn); 376 } 377 } 378 379 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 380 hci_connection_t * conn = hci_connection_for_handle(handle); 381 if (!conn) return 0; 382 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 383 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 384 return 0; 385 } 386 387 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 388 if (!hci_stack->link_key_db) return; 389 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 390 hci_stack->link_key_db->delete_link_key(addr); 391 } 392 393 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 394 if (!hci_stack->link_key_db) return; 395 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 396 hci_stack->link_key_db->put_link_key(addr, link_key, type); 397 } 398 399 void gap_delete_all_link_keys(void){ 400 bd_addr_t addr; 401 link_key_t link_key; 402 link_key_type_t type; 403 btstack_link_key_iterator_t it; 404 int ok = gap_link_key_iterator_init(&it); 405 if (!ok) { 406 log_error("could not initialize iterator"); 407 return; 408 } 409 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 410 gap_drop_link_key_for_bd_addr(addr); 411 } 412 gap_link_key_iterator_done(&it); 413 } 414 415 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 416 if (!hci_stack->link_key_db) return 0; 417 if (!hci_stack->link_key_db->iterator_init) return 0; 418 return hci_stack->link_key_db->iterator_init(it); 419 } 420 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){ 421 if (!hci_stack->link_key_db) return 0; 422 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 423 } 424 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 425 if (!hci_stack->link_key_db) return; 426 hci_stack->link_key_db->iterator_done(it); 427 } 428 #endif 429 430 static int hci_is_le_connection(hci_connection_t * connection){ 431 switch (connection->address_type){ 432 case BD_ADDR_TYPE_LE_PUBLIC: 433 case BD_ADDR_TYPE_LE_RANDOM: 434 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 436 return 1; 437 default: 438 return 0; 439 } 440 } 441 442 /** 443 * count connections 444 */ 445 static int nr_hci_connections(void){ 446 int count = 0; 447 btstack_linked_item_t *it; 448 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 449 count++; 450 } 451 return count; 452 } 453 454 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 455 456 unsigned int num_packets_sent_classic = 0; 457 unsigned int num_packets_sent_le = 0; 458 459 btstack_linked_item_t *it; 460 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 461 hci_connection_t * connection = (hci_connection_t *) it; 462 if (hci_is_le_connection(connection)){ 463 num_packets_sent_le += connection->num_packets_sent; 464 } 465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 466 num_packets_sent_classic += connection->num_packets_sent; 467 } 468 } 469 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 470 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 471 int free_slots_le = 0; 472 473 if (free_slots_classic < 0){ 474 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); 475 return 0; 476 } 477 478 if (hci_stack->le_acl_packets_total_num){ 479 // if we have LE slots, they are used 480 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 481 if (free_slots_le < 0){ 482 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); 483 return 0; 484 } 485 } else { 486 // otherwise, classic slots are used for LE, too 487 free_slots_classic -= num_packets_sent_le; 488 if (free_slots_classic < 0){ 489 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); 490 return 0; 491 } 492 } 493 494 switch (address_type){ 495 case BD_ADDR_TYPE_UNKNOWN: 496 log_error("hci_number_free_acl_slots: unknown address type"); 497 return 0; 498 499 case BD_ADDR_TYPE_ACL: 500 return free_slots_classic; 501 502 default: 503 if (hci_stack->le_acl_packets_total_num){ 504 return free_slots_le; 505 } 506 return free_slots_classic; 507 } 508 } 509 510 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 511 // get connection type 512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 513 if (!connection){ 514 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 515 return 0; 516 } 517 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 518 } 519 520 #ifdef ENABLE_CLASSIC 521 static int hci_number_free_sco_slots(void){ 522 unsigned int num_sco_packets_sent = 0; 523 btstack_linked_item_t *it; 524 if (hci_stack->synchronous_flow_control_enabled){ 525 // explicit flow control 526 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 527 hci_connection_t * connection = (hci_connection_t *) it; 528 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 529 num_sco_packets_sent += connection->num_packets_sent; 530 } 531 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 532 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 533 return 0; 534 } 535 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 536 } else { 537 // implicit flow control -- TODO 538 int num_ready = 0; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 540 hci_connection_t * connection = (hci_connection_t *) it; 541 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 542 if (connection->sco_tx_ready == 0) continue; 543 num_ready++; 544 } 545 return num_ready; 546 } 547 } 548 #endif 549 550 // only used to send HCI Host Number Completed Packets 551 static int hci_can_send_comand_packet_transport(void){ 552 if (hci_stack->hci_packet_buffer_reserved) return 0; 553 554 // check for async hci transport implementations 555 if (hci_stack->hci_transport->can_send_packet_now){ 556 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 557 return 0; 558 } 559 } 560 return 1; 561 } 562 563 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 564 int hci_can_send_command_packet_now(void){ 565 if (hci_can_send_comand_packet_transport() == 0) return 0; 566 return hci_stack->num_cmd_packets > 0u; 567 } 568 569 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 570 // check for async hci transport implementations 571 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 572 return hci_stack->hci_transport->can_send_packet_now(packet_type); 573 } 574 575 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 576 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 577 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 578 } 579 580 int hci_can_send_acl_le_packet_now(void){ 581 if (hci_stack->hci_packet_buffer_reserved) return 0; 582 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 583 } 584 585 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 586 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 587 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 588 } 589 590 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 591 if (hci_stack->hci_packet_buffer_reserved) return 0; 592 return hci_can_send_prepared_acl_packet_now(con_handle); 593 } 594 595 #ifdef ENABLE_CLASSIC 596 int hci_can_send_acl_classic_packet_now(void){ 597 if (hci_stack->hci_packet_buffer_reserved) return 0; 598 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 599 } 600 601 int hci_can_send_prepared_sco_packet_now(void){ 602 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 603 if (hci_have_usb_transport()){ 604 return hci_stack->sco_can_send_now; 605 } else { 606 return hci_number_free_sco_slots() > 0; 607 } 608 } 609 610 int hci_can_send_sco_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_sco_packet_now(); 613 } 614 615 void hci_request_sco_can_send_now_event(void){ 616 hci_stack->sco_waiting_for_can_send_now = 1; 617 hci_notify_if_sco_can_send_now(); 618 } 619 #endif 620 621 // used for internal checks in l2cap.c 622 int hci_is_packet_buffer_reserved(void){ 623 return hci_stack->hci_packet_buffer_reserved; 624 } 625 626 // reserves outgoing packet buffer. @returns 1 if successful 627 int hci_reserve_packet_buffer(void){ 628 if (hci_stack->hci_packet_buffer_reserved) { 629 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 630 return 0; 631 } 632 hci_stack->hci_packet_buffer_reserved = 1; 633 return 1; 634 } 635 636 void hci_release_packet_buffer(void){ 637 hci_stack->hci_packet_buffer_reserved = 0; 638 } 639 640 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 641 static int hci_transport_synchronous(void){ 642 return hci_stack->hci_transport->can_send_packet_now == NULL; 643 } 644 645 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 646 647 // 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); 648 649 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 650 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 651 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 652 max_acl_data_packet_length = hci_stack->le_data_packets_length; 653 } 654 655 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 656 if (hci_is_le_connection(connection)){ 657 max_acl_data_packet_length = connection->le_max_tx_octets; 658 } 659 #endif 660 661 log_debug("hci_send_acl_packet_fragments entered"); 662 663 int err; 664 // multiple packets could be send on a synchronous HCI transport 665 while (true){ 666 667 log_debug("hci_send_acl_packet_fragments loop entered"); 668 669 // get current data 670 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 671 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 672 int more_fragments = 0; 673 674 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 675 if (current_acl_data_packet_length > max_acl_data_packet_length){ 676 more_fragments = 1; 677 current_acl_data_packet_length = max_acl_data_packet_length; 678 } 679 680 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 681 if (acl_header_pos > 0u){ 682 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 683 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 684 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 685 } 686 687 // update header len 688 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 689 690 // count packet 691 connection->num_packets_sent++; 692 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 693 694 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 695 if (more_fragments){ 696 // update start of next fragment to send 697 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 698 } else { 699 // done 700 hci_stack->acl_fragmentation_pos = 0; 701 hci_stack->acl_fragmentation_total_size = 0; 702 } 703 704 // send packet 705 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 706 const int size = current_acl_data_packet_length + 4; 707 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 708 hci_stack->acl_fragmentation_tx_active = 1; 709 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 710 711 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 712 713 // done yet? 714 if (!more_fragments) break; 715 716 // can send more? 717 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 718 } 719 720 log_debug("hci_send_acl_packet_fragments loop over"); 721 722 // release buffer now for synchronous transport 723 if (hci_transport_synchronous()){ 724 hci_stack->acl_fragmentation_tx_active = 0; 725 hci_release_packet_buffer(); 726 hci_emit_transport_packet_sent(); 727 } 728 729 return err; 730 } 731 732 // pre: caller has reserved the packet buffer 733 int hci_send_acl_packet_buffer(int size){ 734 735 // log_info("hci_send_acl_packet_buffer size %u", size); 736 737 if (!hci_stack->hci_packet_buffer_reserved) { 738 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 739 return 0; 740 } 741 742 uint8_t * packet = hci_stack->hci_packet_buffer; 743 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 744 745 // check for free places on Bluetooth module 746 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 747 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 748 hci_release_packet_buffer(); 749 hci_emit_transport_packet_sent(); 750 return BTSTACK_ACL_BUFFERS_FULL; 751 } 752 753 hci_connection_t *connection = hci_connection_for_handle( con_handle); 754 if (!connection) { 755 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 756 hci_release_packet_buffer(); 757 hci_emit_transport_packet_sent(); 758 return 0; 759 } 760 761 #ifdef ENABLE_CLASSIC 762 hci_connection_timestamp(connection); 763 #endif 764 765 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 766 767 // setup data 768 hci_stack->acl_fragmentation_total_size = size; 769 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 770 771 return hci_send_acl_packet_fragments(connection); 772 } 773 774 #ifdef ENABLE_CLASSIC 775 // pre: caller has reserved the packet buffer 776 int hci_send_sco_packet_buffer(int size){ 777 778 // log_info("hci_send_acl_packet_buffer size %u", size); 779 780 if (!hci_stack->hci_packet_buffer_reserved) { 781 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 782 return 0; 783 } 784 785 uint8_t * packet = hci_stack->hci_packet_buffer; 786 787 // skip checks in loopback mode 788 if (!hci_stack->loopback_mode){ 789 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 790 791 // check for free places on Bluetooth module 792 if (!hci_can_send_prepared_sco_packet_now()) { 793 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 return BTSTACK_ACL_BUFFERS_FULL; 797 } 798 799 // track send packet in connection struct 800 hci_connection_t *connection = hci_connection_for_handle( con_handle); 801 if (!connection) { 802 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 803 hci_release_packet_buffer(); 804 hci_emit_transport_packet_sent(); 805 return 0; 806 } 807 808 if (hci_have_usb_transport()){ 809 // token used 810 hci_stack->sco_can_send_now = 0; 811 } else { 812 if (hci_stack->synchronous_flow_control_enabled){ 813 connection->num_packets_sent++; 814 } else { 815 connection->sco_tx_ready--; 816 } 817 } 818 } 819 820 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 821 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 822 823 if (hci_transport_synchronous()){ 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 } 827 828 return err; 829 } 830 #endif 831 832 static void acl_handler(uint8_t *packet, uint16_t size){ 833 834 // get info 835 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 836 hci_connection_t *conn = hci_connection_for_handle(con_handle); 837 uint8_t acl_flags = READ_ACL_FLAGS(packet); 838 uint16_t acl_length = READ_ACL_LENGTH(packet); 839 840 // ignore non-registered handle 841 if (!conn){ 842 log_error("acl_handler called with non-registered handle %u!" , con_handle); 843 return; 844 } 845 846 // assert packet is complete 847 if ((acl_length + 4u) != size){ 848 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 849 return; 850 } 851 852 #ifdef ENABLE_CLASSIC 853 // update idle timestamp 854 hci_connection_timestamp(conn); 855 #endif 856 857 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 858 hci_stack->host_completed_packets = 1; 859 conn->num_packets_completed++; 860 #endif 861 862 // handle different packet types 863 switch (acl_flags & 0x03u) { 864 865 case 0x01: // continuation fragment 866 867 // sanity checks 868 if (conn->acl_recombination_pos == 0u) { 869 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 870 return; 871 } 872 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 873 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 874 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 875 conn->acl_recombination_pos = 0; 876 return; 877 } 878 879 // append fragment payload (header already stored) 880 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 881 &packet[4], acl_length); 882 conn->acl_recombination_pos += acl_length; 883 884 // forward complete L2CAP packet if complete. 885 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 886 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 887 // reset recombination buffer 888 conn->acl_recombination_length = 0; 889 conn->acl_recombination_pos = 0; 890 } 891 break; 892 893 case 0x02: { // first fragment 894 895 // sanity check 896 if (conn->acl_recombination_pos) { 897 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 898 conn->acl_recombination_pos = 0; 899 } 900 901 // peek into L2CAP packet! 902 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 903 904 // compare fragment size to L2CAP packet size 905 if (acl_length >= (l2cap_length + 4u)){ 906 // forward fragment as L2CAP packet 907 hci_emit_acl_packet(packet, acl_length + 4u); 908 } else { 909 910 if (acl_length > HCI_ACL_BUFFER_SIZE){ 911 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 912 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 913 return; 914 } 915 916 // store first fragment and tweak acl length for complete package 917 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 918 packet, acl_length + 4u); 919 conn->acl_recombination_pos = acl_length + 4u; 920 conn->acl_recombination_length = l2cap_length; 921 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 922 } 923 break; 924 925 } 926 default: 927 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 928 return; 929 } 930 931 // execute main loop 932 hci_run(); 933 } 934 935 static void hci_shutdown_connection(hci_connection_t *conn){ 936 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 937 938 #ifdef ENABLE_CLASSIC 939 #ifdef ENABLE_SCO_OVER_HCI 940 int addr_type = conn->address_type; 941 #endif 942 #endif 943 944 btstack_run_loop_remove_timer(&conn->timeout); 945 946 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 947 btstack_memory_hci_connection_free( conn ); 948 949 // now it's gone 950 hci_emit_nr_connections_changed(); 951 952 #ifdef ENABLE_CLASSIC 953 #ifdef ENABLE_SCO_OVER_HCI 954 // update SCO 955 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 956 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 957 } 958 #endif 959 #endif 960 } 961 962 #ifdef ENABLE_CLASSIC 963 964 static const uint16_t packet_type_sizes[] = { 965 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 966 HCI_ACL_DH1_SIZE, 0, 0, 0, 967 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 968 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 969 }; 970 static const uint8_t packet_type_feature_requirement_bit[] = { 971 0, // 3 slot packets 972 1, // 5 slot packets 973 25, // EDR 2 mpbs 974 26, // EDR 3 mbps 975 39, // 3 slot EDR packts 976 40, // 5 slot EDR packet 977 }; 978 static const uint16_t packet_type_feature_packet_mask[] = { 979 0x0f00, // 3 slot packets 980 0xf000, // 5 slot packets 981 0x1102, // EDR 2 mpbs 982 0x2204, // EDR 3 mbps 983 0x0300, // 3 slot EDR packts 984 0x3000, // 5 slot EDR packet 985 }; 986 987 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 988 // enable packet types based on size 989 uint16_t packet_types = 0; 990 unsigned int i; 991 for (i=0;i<16;i++){ 992 if (packet_type_sizes[i] == 0) continue; 993 if (packet_type_sizes[i] <= buffer_size){ 994 packet_types |= 1 << i; 995 } 996 } 997 // disable packet types due to missing local supported features 998 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 999 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1000 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1001 if (feature_set) continue; 1002 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1003 packet_types &= ~packet_type_feature_packet_mask[i]; 1004 } 1005 // flip bits for "may not be used" 1006 packet_types ^= 0x3306; 1007 return packet_types; 1008 } 1009 1010 uint16_t hci_usable_acl_packet_types(void){ 1011 return hci_stack->packet_types; 1012 } 1013 #endif 1014 1015 uint8_t* hci_get_outgoing_packet_buffer(void){ 1016 // hci packet buffer is >= acl data packet length 1017 return hci_stack->hci_packet_buffer; 1018 } 1019 1020 uint16_t hci_max_acl_data_packet_length(void){ 1021 return hci_stack->acl_data_packet_length; 1022 } 1023 1024 #ifdef ENABLE_CLASSIC 1025 int hci_extended_sco_link_supported(void){ 1026 // No. 31, byte 3, bit 7 1027 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1028 } 1029 #endif 1030 1031 int hci_non_flushable_packet_boundary_flag_supported(void){ 1032 // No. 54, byte 6, bit 6 1033 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1034 } 1035 1036 static int gap_ssp_supported(void){ 1037 // No. 51, byte 6, bit 3 1038 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1039 } 1040 1041 static int hci_classic_supported(void){ 1042 #ifdef ENABLE_CLASSIC 1043 // No. 37, byte 4, bit 5, = No BR/EDR Support 1044 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1045 #else 1046 return 0; 1047 #endif 1048 } 1049 1050 static int hci_le_supported(void){ 1051 #ifdef ENABLE_BLE 1052 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1053 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1054 #else 1055 return 0; 1056 #endif 1057 } 1058 1059 #ifdef ENABLE_BLE 1060 1061 /** 1062 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1063 */ 1064 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1065 *addr_type = hci_stack->le_own_addr_type; 1066 if (hci_stack->le_own_addr_type){ 1067 (void)memcpy(addr, hci_stack->le_random_address, 6); 1068 } else { 1069 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1070 } 1071 } 1072 1073 #ifdef ENABLE_LE_CENTRAL 1074 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1075 1076 int offset = 3; 1077 int num_reports = packet[offset]; 1078 offset += 1; 1079 1080 int i; 1081 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1082 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1083 for (i=0; (i<num_reports) && (offset < size);i++){ 1084 // sanity checks on data_length: 1085 uint8_t data_length = packet[offset + 8]; 1086 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1087 if ((offset + 9u + data_length + 1u) > size) return; 1088 // setup event 1089 uint8_t event_size = 10u + data_length; 1090 int pos = 0; 1091 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1092 event[pos++] = event_size; 1093 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1094 offset += 8; 1095 pos += 8; 1096 event[pos++] = packet[offset + 1 + data_length]; // rssi 1097 event[pos++] = data_length; 1098 offset++; 1099 (void)memcpy(&event[pos], &packet[offset], data_length); 1100 pos += data_length; 1101 offset += data_length + 1u; // rssi 1102 hci_emit_event(event, pos, 1); 1103 } 1104 } 1105 #endif 1106 #endif 1107 1108 #ifdef ENABLE_BLE 1109 #ifdef ENABLE_LE_PERIPHERAL 1110 static void hci_reenable_advertisements_if_needed(void){ 1111 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1112 // get number of active le slave connections 1113 int num_slave_connections = 0; 1114 btstack_linked_list_iterator_t it; 1115 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1116 while (btstack_linked_list_iterator_has_next(&it)){ 1117 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1118 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1119 if (con->state != OPEN) continue; 1120 if (con->role != HCI_ROLE_SLAVE) continue; 1121 if (!hci_is_le_connection(con)) continue; 1122 num_slave_connections++; 1123 } 1124 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1125 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1126 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1127 } 1128 } 1129 } 1130 #endif 1131 #endif 1132 1133 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1134 1135 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1136 if (!hci_stack->config) return 0; 1137 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1138 // Limit baud rate for Broadcom chipsets to 3 mbps 1139 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1140 baud_rate = 3000000; 1141 } 1142 return baud_rate; 1143 } 1144 1145 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1146 UNUSED(ds); 1147 1148 switch (hci_stack->substate){ 1149 case HCI_INIT_W4_SEND_RESET: 1150 log_info("Resend HCI Reset"); 1151 hci_stack->substate = HCI_INIT_SEND_RESET; 1152 hci_stack->num_cmd_packets = 1; 1153 hci_run(); 1154 break; 1155 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1156 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1157 if (hci_stack->hci_transport->reset_link){ 1158 hci_stack->hci_transport->reset_link(); 1159 } 1160 1161 /* fall through */ 1162 1163 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1164 log_info("Resend HCI Reset - CSR Warm Boot"); 1165 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1166 hci_stack->num_cmd_packets = 1; 1167 hci_run(); 1168 break; 1169 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1170 if (hci_stack->hci_transport->set_baudrate){ 1171 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1172 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1173 hci_stack->hci_transport->set_baudrate(baud_rate); 1174 } 1175 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1176 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1177 if (hci_stack->hci_transport->reset_link){ 1178 log_info("Link Reset"); 1179 hci_stack->hci_transport->reset_link(); 1180 } 1181 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1182 hci_run(); 1183 } 1184 break; 1185 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1186 // otherwise continue 1187 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1188 hci_send_cmd(&hci_read_local_supported_commands); 1189 break; 1190 default: 1191 break; 1192 } 1193 } 1194 #endif 1195 1196 static void hci_initializing_next_state(void){ 1197 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1198 } 1199 1200 // assumption: hci_can_send_command_packet_now() == true 1201 static void hci_initializing_run(void){ 1202 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1203 switch (hci_stack->substate){ 1204 case HCI_INIT_SEND_RESET: 1205 hci_state_reset(); 1206 1207 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1208 // prepare reset if command complete not received in 100ms 1209 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1210 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1211 btstack_run_loop_add_timer(&hci_stack->timeout); 1212 #endif 1213 // send command 1214 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1215 hci_send_cmd(&hci_reset); 1216 break; 1217 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1218 hci_send_cmd(&hci_read_local_version_information); 1219 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1220 break; 1221 case HCI_INIT_SEND_READ_LOCAL_NAME: 1222 hci_send_cmd(&hci_read_local_name); 1223 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1224 break; 1225 1226 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1227 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1228 hci_state_reset(); 1229 // prepare reset if command complete not received in 100ms 1230 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1231 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1232 btstack_run_loop_add_timer(&hci_stack->timeout); 1233 // send command 1234 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1235 hci_send_cmd(&hci_reset); 1236 break; 1237 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1238 hci_state_reset(); 1239 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1240 hci_send_cmd(&hci_reset); 1241 break; 1242 case HCI_INIT_SEND_BAUD_CHANGE: { 1243 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1244 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1245 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1246 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1247 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1248 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1249 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1250 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1251 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1252 btstack_run_loop_add_timer(&hci_stack->timeout); 1253 } 1254 break; 1255 } 1256 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1258 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1259 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1260 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1261 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1262 break; 1263 } 1264 case HCI_INIT_CUSTOM_INIT: 1265 // Custom initialization 1266 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1267 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1268 int send_cmd = 0; 1269 switch (hci_stack->chipset_result){ 1270 case BTSTACK_CHIPSET_VALID_COMMAND: 1271 send_cmd = 1; 1272 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1273 break; 1274 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1275 send_cmd = 1; 1276 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1277 log_info("CSR Warm Boot"); 1278 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1279 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1280 btstack_run_loop_add_timer(&hci_stack->timeout); 1281 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1282 && hci_stack->config 1283 && hci_stack->chipset 1284 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1285 && hci_stack->hci_transport->set_baudrate 1286 && hci_transport_uart_get_main_baud_rate()){ 1287 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1288 } else { 1289 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1290 } 1291 break; 1292 default: 1293 break; 1294 } 1295 1296 if (send_cmd){ 1297 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1298 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1299 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1300 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1301 break; 1302 } 1303 log_info("Init script done"); 1304 1305 // Init script download on Broadcom chipsets causes: 1306 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1307 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1308 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1309 1310 // - baud rate to reset, restore UART baud rate if needed 1311 int need_baud_change = hci_stack->config 1312 && hci_stack->chipset 1313 && hci_stack->chipset->set_baudrate_command 1314 && hci_stack->hci_transport->set_baudrate 1315 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1316 if (need_baud_change) { 1317 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1318 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1319 hci_stack->hci_transport->set_baudrate(baud_rate); 1320 } 1321 1322 uint16_t bcm_delay_ms = 300; 1323 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1324 // -> Work around: wait here. 1325 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1326 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1327 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1328 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1329 btstack_run_loop_add_timer(&hci_stack->timeout); 1330 break; 1331 } 1332 } 1333 // otherwise continue 1334 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1335 hci_send_cmd(&hci_read_local_supported_commands); 1336 break; 1337 case HCI_INIT_SET_BD_ADDR: 1338 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1339 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1340 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1341 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1342 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1343 break; 1344 #endif 1345 1346 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1347 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_READ_BD_ADDR: 1352 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1353 hci_send_cmd(&hci_read_bd_addr); 1354 break; 1355 case HCI_INIT_READ_BUFFER_SIZE: 1356 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1357 hci_send_cmd(&hci_read_buffer_size); 1358 break; 1359 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1360 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1361 hci_send_cmd(&hci_read_local_supported_features); 1362 break; 1363 1364 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1365 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1366 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1367 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1368 break; 1369 case HCI_INIT_HOST_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1371 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1372 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1373 break; 1374 #endif 1375 1376 case HCI_INIT_SET_EVENT_MASK: 1377 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1378 if (hci_le_supported()){ 1379 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1380 } else { 1381 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1382 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1383 } 1384 break; 1385 1386 #ifdef ENABLE_CLASSIC 1387 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1388 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1389 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1390 break; 1391 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1392 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1393 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1394 break; 1395 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1396 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1397 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1398 break; 1399 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1400 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1401 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1402 break; 1403 case HCI_INIT_WRITE_LOCAL_NAME: { 1404 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1405 hci_reserve_packet_buffer(); 1406 uint8_t * packet = hci_stack->hci_packet_buffer; 1407 // construct HCI Command and send 1408 uint16_t opcode = hci_write_local_name.opcode; 1409 hci_stack->last_cmd_opcode = opcode; 1410 packet[0] = opcode & 0xff; 1411 packet[1] = opcode >> 8; 1412 packet[2] = DEVICE_NAME_LEN; 1413 memset(&packet[3], 0, DEVICE_NAME_LEN); 1414 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1415 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1416 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1417 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1418 // expand '00:00:00:00:00:00' in name with bd_addr 1419 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1420 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1421 break; 1422 } 1423 case HCI_INIT_WRITE_EIR_DATA: { 1424 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1425 hci_reserve_packet_buffer(); 1426 uint8_t * packet = hci_stack->hci_packet_buffer; 1427 // construct HCI Command in-place and send 1428 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1429 hci_stack->last_cmd_opcode = opcode; 1430 uint16_t offset = 0; 1431 packet[offset++] = opcode & 0xff; 1432 packet[offset++] = opcode >> 8; 1433 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1434 packet[offset++] = 0; // FEC not required 1435 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1436 if (hci_stack->eir_data){ 1437 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1438 ad_context_t context; 1439 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1440 uint8_t data_type = ad_iterator_get_data_type(&context); 1441 uint8_t size = ad_iterator_get_data_len(&context); 1442 const uint8_t *data = ad_iterator_get_data(&context); 1443 // copy item 1444 packet[offset++] = size + 1; 1445 packet[offset++] = data_type; 1446 memcpy(&packet[offset], data, size); 1447 // update name item 1448 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1449 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1450 } 1451 offset += size; 1452 } 1453 } else { 1454 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1455 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1456 packet[offset++] = bytes_to_copy + 1; 1457 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1458 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1459 // expand '00:00:00:00:00:00' in name with bd_addr 1460 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1461 } 1462 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1463 break; 1464 } 1465 case HCI_INIT_WRITE_INQUIRY_MODE: 1466 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1467 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1468 break; 1469 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1470 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1471 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1472 break; 1473 case HCI_INIT_WRITE_SCAN_ENABLE: 1474 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1475 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1476 break; 1477 // only sent if ENABLE_SCO_OVER_HCI is defined 1478 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1479 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1480 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1481 break; 1482 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1483 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1484 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1485 break; 1486 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1487 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1488 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1489 log_info("BCM: Route SCO data via HCI transport"); 1490 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1491 break; 1492 1493 #endif 1494 #ifdef ENABLE_BLE 1495 // LE INIT 1496 case HCI_INIT_LE_READ_BUFFER_SIZE: 1497 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1498 hci_send_cmd(&hci_le_read_buffer_size); 1499 break; 1500 case HCI_INIT_LE_SET_EVENT_MASK: 1501 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1502 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1503 break; 1504 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1505 // LE Supported Host = 1, Simultaneous Host = 0 1506 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1507 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1508 break; 1509 #endif 1510 1511 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1512 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1513 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1514 hci_send_cmd(&hci_le_read_maximum_data_length); 1515 break; 1516 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1517 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1518 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1519 break; 1520 #endif 1521 1522 #ifdef ENABLE_LE_CENTRAL 1523 case HCI_INIT_READ_WHITE_LIST_SIZE: 1524 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1525 hci_send_cmd(&hci_le_read_white_list_size); 1526 break; 1527 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1528 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1529 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1530 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); 1531 break; 1532 #endif 1533 default: 1534 return; 1535 } 1536 } 1537 1538 static void hci_init_done(void){ 1539 // done. tell the app 1540 log_info("hci_init_done -> HCI_STATE_WORKING"); 1541 hci_stack->state = HCI_STATE_WORKING; 1542 hci_emit_state(); 1543 hci_run(); 1544 } 1545 1546 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1547 bool command_completed = false; 1548 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1549 uint16_t opcode = little_endian_read_16(packet,3); 1550 if (opcode == hci_stack->last_cmd_opcode){ 1551 command_completed = true; 1552 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1553 } else { 1554 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1555 } 1556 } 1557 1558 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1559 uint8_t status = packet[2]; 1560 uint16_t opcode = little_endian_read_16(packet,4); 1561 if (opcode == hci_stack->last_cmd_opcode){ 1562 if (status){ 1563 command_completed = true; 1564 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1565 } else { 1566 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1567 } 1568 } else { 1569 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1570 } 1571 } 1572 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1573 // Vendor == CSR 1574 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1575 // TODO: track actual command 1576 command_completed = true; 1577 } 1578 1579 // Vendor == Toshiba 1580 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1581 // TODO: track actual command 1582 command_completed = true; 1583 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1584 hci_stack->num_cmd_packets = 1; 1585 } 1586 #endif 1587 1588 return command_completed; 1589 } 1590 1591 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1592 1593 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1594 1595 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1596 1597 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1598 1599 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1600 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1601 // 1602 // HCI Reset 1603 // Timeout 100 ms 1604 // HCI Reset 1605 // Command Complete Reset 1606 // HCI Read Local Version Information 1607 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1608 // hang... 1609 // 1610 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1611 if (!command_completed 1612 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1613 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1614 1615 uint16_t opcode = little_endian_read_16(packet,3); 1616 if (opcode == hci_reset.opcode){ 1617 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1618 return; 1619 } 1620 } 1621 1622 // CSR & H5 1623 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1624 if (!command_completed 1625 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1626 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1627 1628 uint16_t opcode = little_endian_read_16(packet,3); 1629 if (opcode == hci_reset.opcode){ 1630 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1631 return; 1632 } 1633 } 1634 1635 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1636 // fix: Correct substate and behave as command below 1637 if (command_completed){ 1638 switch (hci_stack->substate){ 1639 case HCI_INIT_SEND_RESET: 1640 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1641 break; 1642 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1643 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1644 break; 1645 default: 1646 break; 1647 } 1648 } 1649 1650 #endif 1651 1652 if (!command_completed) return; 1653 1654 bool need_baud_change = false; 1655 bool need_addr_change = false; 1656 1657 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1658 need_baud_change = hci_stack->config 1659 && hci_stack->chipset 1660 && hci_stack->chipset->set_baudrate_command 1661 && hci_stack->hci_transport->set_baudrate 1662 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1663 1664 need_addr_change = hci_stack->custom_bd_addr_set 1665 && hci_stack->chipset 1666 && hci_stack->chipset->set_bd_addr_command; 1667 #endif 1668 1669 switch(hci_stack->substate){ 1670 1671 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1672 case HCI_INIT_SEND_RESET: 1673 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1674 // fix: just correct substate and behave as command below 1675 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1676 btstack_run_loop_remove_timer(&hci_stack->timeout); 1677 break; 1678 case HCI_INIT_W4_SEND_RESET: 1679 btstack_run_loop_remove_timer(&hci_stack->timeout); 1680 break; 1681 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1682 log_info("Received local name, need baud change %d", (int) need_baud_change); 1683 if (need_baud_change){ 1684 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1685 return; 1686 } 1687 // skip baud change 1688 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1689 return; 1690 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1691 // for STLC2500D, baud rate change already happened. 1692 // for others, baud rate gets changed now 1693 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1694 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1695 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1696 hci_stack->hci_transport->set_baudrate(baud_rate); 1697 } 1698 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1699 return; 1700 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1701 btstack_run_loop_remove_timer(&hci_stack->timeout); 1702 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1703 return; 1704 case HCI_INIT_W4_CUSTOM_INIT: 1705 // repeat custom init 1706 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1707 return; 1708 #else 1709 case HCI_INIT_W4_SEND_RESET: 1710 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1711 return ; 1712 #endif 1713 1714 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1715 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1716 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1717 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1718 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1719 return; 1720 } 1721 if (need_addr_change){ 1722 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1723 return; 1724 } 1725 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1726 return; 1727 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1728 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1729 if (need_baud_change){ 1730 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1731 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1732 hci_stack->hci_transport->set_baudrate(baud_rate); 1733 } 1734 if (need_addr_change){ 1735 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1736 return; 1737 } 1738 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1739 return; 1740 case HCI_INIT_W4_SET_BD_ADDR: 1741 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1742 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1743 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1744 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1745 return; 1746 } 1747 // skipping st warm boot 1748 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1749 return; 1750 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1751 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1752 return; 1753 #endif 1754 case HCI_INIT_W4_READ_BD_ADDR: 1755 // only read buffer size if supported 1756 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1757 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1758 return; 1759 } 1760 // skipping read buffer size 1761 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1762 return; 1763 case HCI_INIT_W4_SET_EVENT_MASK: 1764 // skip Classic init commands for LE only chipsets 1765 if (!hci_classic_supported()){ 1766 #ifdef ENABLE_BLE 1767 if (hci_le_supported()){ 1768 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1769 return; 1770 } 1771 #endif 1772 log_error("Neither BR/EDR nor LE supported"); 1773 hci_init_done(); 1774 return; 1775 } 1776 if (!gap_ssp_supported()){ 1777 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1778 return; 1779 } 1780 break; 1781 #ifdef ENABLE_BLE 1782 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1783 // skip write le host if not supported (e.g. on LE only EM9301) 1784 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1785 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1786 return; 1787 1788 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1789 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1790 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1791 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1792 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1793 return; 1794 } 1795 // explicit fall through to reduce repetitions 1796 1797 #ifdef ENABLE_LE_CENTRAL 1798 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1799 #else 1800 hci_init_done(); 1801 #endif 1802 return; 1803 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1804 1805 #endif /* ENABLE_BLE */ 1806 1807 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1808 // skip write secure connections host support if not supported or disabled 1809 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1810 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1811 return; 1812 } 1813 break; 1814 1815 #ifdef ENABLE_SCO_OVER_HCI 1816 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1817 // skip write synchronous flow control if not supported 1818 if (hci_stack->local_supported_commands[0] & 0x04) break; 1819 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1820 1821 /* fall through */ 1822 1823 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1824 // skip write default erroneous data reporting if not supported 1825 if (hci_stack->local_supported_commands[0] & 0x08) break; 1826 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1827 1828 /* fall through */ 1829 1830 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1831 // skip bcm set sco pcm config on non-Broadcom chipsets 1832 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1833 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1834 1835 /* fall through */ 1836 1837 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1838 if (!hci_le_supported()){ 1839 // SKIP LE init for Classic only configuration 1840 hci_init_done(); 1841 return; 1842 } 1843 break; 1844 1845 #else /* !ENABLE_SCO_OVER_HCI */ 1846 1847 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1848 #ifdef ENABLE_BLE 1849 if (hci_le_supported()){ 1850 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1851 return; 1852 } 1853 #endif 1854 // SKIP LE init for Classic only configuration 1855 hci_init_done(); 1856 return; 1857 #endif /* ENABLE_SCO_OVER_HCI */ 1858 1859 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1860 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1861 // Response to command before init done state -> init done 1862 case (HCI_INIT_DONE-1): 1863 hci_init_done(); 1864 return; 1865 #endif 1866 1867 default: 1868 break; 1869 } 1870 hci_initializing_next_state(); 1871 } 1872 1873 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1874 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1875 bd_addr_t bd_address; 1876 (void)memcpy(&bd_address, conn->address, 6); 1877 1878 #ifdef ENABLE_CLASSIC 1879 // cache needed data 1880 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1881 #endif 1882 1883 // connection failed, remove entry 1884 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1885 btstack_memory_hci_connection_free( conn ); 1886 1887 #ifdef ENABLE_CLASSIC 1888 // notify client if dedicated bonding 1889 if (notify_dedicated_bonding_failed){ 1890 log_info("hci notify_dedicated_bonding_failed"); 1891 hci_emit_dedicated_bonding_result(bd_address, status); 1892 } 1893 1894 // if authentication error, also delete link key 1895 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1896 gap_drop_link_key_for_bd_addr(bd_address); 1897 } 1898 #endif 1899 } 1900 1901 #ifdef ENABLE_CLASSIC 1902 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1903 // SSP Controller 1904 if (features[6] & (1 << 3)){ 1905 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1906 } 1907 // eSCO 1908 if (features[3] & (1<<7)){ 1909 conn->remote_supported_features[0] |= 1; 1910 } 1911 // Extended features 1912 if (features[7] & (1<<7)){ 1913 conn->remote_supported_features[0] |= 2; 1914 } 1915 } 1916 1917 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1918 // SSP Host 1919 if (features[0] & (1 << 0)){ 1920 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1921 } 1922 // SC Host 1923 if (features[0] & (1 << 3)){ 1924 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1925 } 1926 } 1927 1928 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1929 // SC Controller 1930 if (features[1] & (1 << 0)){ 1931 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1932 } 1933 } 1934 1935 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1936 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1937 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1938 if (conn->bonding_flags & BONDING_DEDICATED){ 1939 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1940 } 1941 } 1942 #endif 1943 1944 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1945 // handle BT initialization 1946 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1947 hci_initializing_event_handler(packet, size); 1948 } 1949 1950 // help with BT sleep 1951 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1952 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1953 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1954 hci_initializing_next_state(); 1955 } 1956 } 1957 1958 #ifdef ENABLE_CLASSIC 1959 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1960 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1961 conn->encryption_key_size = encryption_key_size; 1962 1963 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1964 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1965 return; 1966 } 1967 1968 // Request Authentication if not already done 1969 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1970 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1971 } 1972 #endif 1973 1974 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1975 UNUSED(size); 1976 1977 uint16_t manufacturer; 1978 #ifdef ENABLE_CLASSIC 1979 hci_con_handle_t handle; 1980 hci_connection_t * conn; 1981 uint8_t status; 1982 #endif 1983 // get num cmd packets - limit to 1 to reduce complexity 1984 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1985 1986 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1987 switch (opcode){ 1988 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1989 if (packet[5]) break; 1990 // terminate, name 248 chars 1991 packet[6+248] = 0; 1992 log_info("local name: %s", &packet[6]); 1993 break; 1994 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 1995 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1996 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1997 uint16_t acl_len = little_endian_read_16(packet, 6); 1998 uint16_t sco_len = packet[8]; 1999 2000 // determine usable ACL/SCO payload size 2001 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2002 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2003 2004 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2005 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2006 2007 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2008 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2009 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2010 } 2011 break; 2012 case HCI_OPCODE_HCI_READ_RSSI: 2013 if (packet[5] == ERROR_CODE_SUCCESS){ 2014 uint8_t event[5]; 2015 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2016 event[1] = 3; 2017 (void)memcpy(&event[2], &packet[6], 3); 2018 hci_emit_event(event, sizeof(event), 1); 2019 } 2020 break; 2021 #ifdef ENABLE_BLE 2022 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2023 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2024 hci_stack->le_acl_packets_total_num = packet[8]; 2025 // determine usable ACL payload size 2026 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2027 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2028 } 2029 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2030 break; 2031 #endif 2032 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2033 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2034 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2035 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2036 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); 2037 break; 2038 #endif 2039 #ifdef ENABLE_LE_CENTRAL 2040 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2041 hci_stack->le_whitelist_capacity = packet[6]; 2042 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2043 break; 2044 #endif 2045 case HCI_OPCODE_HCI_READ_BD_ADDR: 2046 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2047 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)); 2048 #ifdef ENABLE_CLASSIC 2049 if (hci_stack->link_key_db){ 2050 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2051 } 2052 #endif 2053 break; 2054 #ifdef ENABLE_CLASSIC 2055 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2056 hci_emit_discoverable_enabled(hci_stack->discoverable); 2057 break; 2058 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2059 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2060 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2061 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2062 hci_emit_event(event, sizeof(event), 1); 2063 } 2064 break; 2065 #endif 2066 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2067 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2068 2069 #ifdef ENABLE_CLASSIC 2070 // determine usable ACL packet types based on host buffer size and supported features 2071 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2072 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2073 #endif 2074 // Classic/LE 2075 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2076 break; 2077 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2078 manufacturer = little_endian_read_16(packet, 10); 2079 // map Cypress to Broadcom 2080 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2081 log_info("Treat Cypress as Broadcom"); 2082 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2083 little_endian_store_16(packet, 10, manufacturer); 2084 } 2085 hci_stack->manufacturer = manufacturer; 2086 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2087 break; 2088 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2089 hci_stack->local_supported_commands[0] = 2090 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2091 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2092 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2093 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2094 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2098 hci_stack->local_supported_commands[1] = 2099 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2101 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2102 break; 2103 #ifdef ENABLE_CLASSIC 2104 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2105 if (packet[5]) return; 2106 hci_stack->synchronous_flow_control_enabled = 1; 2107 break; 2108 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2109 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2110 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2111 conn = hci_connection_for_handle(handle); 2112 if (conn != NULL) { 2113 uint8_t key_size = 0; 2114 if (status == 0){ 2115 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2116 log_info("Handle %x04x key Size: %u", handle, key_size); 2117 } else { 2118 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2119 } 2120 hci_handle_read_encryption_key_size_complete(conn, key_size); 2121 } 2122 break; 2123 #endif 2124 default: 2125 break; 2126 } 2127 } 2128 2129 static void event_handler(uint8_t *packet, uint16_t size){ 2130 2131 uint16_t event_length = packet[1]; 2132 2133 // assert packet is complete 2134 if (size != (event_length + 2u)){ 2135 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2136 return; 2137 } 2138 2139 bd_addr_t addr; 2140 bd_addr_type_t addr_type; 2141 hci_con_handle_t handle; 2142 hci_connection_t * conn; 2143 int i; 2144 int create_connection_cmd; 2145 2146 #ifdef ENABLE_CLASSIC 2147 uint8_t link_type; 2148 #endif 2149 2150 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2151 2152 switch (hci_event_packet_get_type(packet)) { 2153 2154 case HCI_EVENT_COMMAND_COMPLETE: 2155 handle_command_complete_event(packet, size); 2156 break; 2157 2158 case HCI_EVENT_COMMAND_STATUS: 2159 // get num cmd packets - limit to 1 to reduce complexity 2160 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2161 2162 // check command status to detected failed outgoing connections 2163 create_connection_cmd = 0; 2164 #ifdef ENABLE_CLASSIC 2165 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2166 create_connection_cmd = 1; 2167 } 2168 #endif 2169 #ifdef ENABLE_LE_CENTRAL 2170 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2171 create_connection_cmd = 1; 2172 } 2173 #endif 2174 if (create_connection_cmd) { 2175 uint8_t status = hci_event_command_status_get_status(packet); 2176 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2177 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); 2178 2179 // reset outgoing address info 2180 memset(hci_stack->outgoing_addr, 0, 6); 2181 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2182 2183 // error => outgoing connection failed 2184 if ((conn != NULL) && (status != 0u)){ 2185 hci_handle_connection_failed(conn, status); 2186 } 2187 } 2188 break; 2189 2190 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2191 if (size < 3) return; 2192 uint16_t num_handles = packet[2]; 2193 if (size != (3u + num_handles * 4u)) return; 2194 uint16_t offset = 3; 2195 for (i=0; i<num_handles;i++){ 2196 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2197 offset += 2u; 2198 uint16_t num_packets = little_endian_read_16(packet, offset); 2199 offset += 2u; 2200 2201 conn = hci_connection_for_handle(handle); 2202 if (!conn){ 2203 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2204 continue; 2205 } 2206 2207 if (conn->num_packets_sent >= num_packets){ 2208 conn->num_packets_sent -= num_packets; 2209 } else { 2210 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2211 conn->num_packets_sent = 0; 2212 } 2213 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // For SCO, we do the can_send_now_check here 2217 hci_notify_if_sco_can_send_now(); 2218 #endif 2219 } 2220 break; 2221 } 2222 2223 #ifdef ENABLE_CLASSIC 2224 case HCI_EVENT_INQUIRY_COMPLETE: 2225 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2226 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2227 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2228 hci_emit_event(event, sizeof(event), 1); 2229 } 2230 break; 2231 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2232 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2233 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2234 } 2235 break; 2236 case HCI_EVENT_CONNECTION_REQUEST: 2237 reverse_bd_addr(&packet[2], addr); 2238 if (hci_stack->gap_classic_accept_callback != NULL){ 2239 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2240 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2241 bd_addr_copy(hci_stack->decline_addr, addr); 2242 break; 2243 } 2244 } 2245 2246 // TODO: eval COD 8-10 2247 link_type = packet[11]; 2248 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2249 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2250 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2251 if (!conn) { 2252 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2253 } 2254 if (!conn) { 2255 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2256 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2257 bd_addr_copy(hci_stack->decline_addr, addr); 2258 break; 2259 } 2260 conn->role = HCI_ROLE_SLAVE; 2261 conn->state = RECEIVED_CONNECTION_REQUEST; 2262 // store info about eSCO 2263 if (link_type == 0x02){ 2264 conn->remote_supported_features[0] |= 1; 2265 } 2266 hci_run(); 2267 break; 2268 2269 case HCI_EVENT_CONNECTION_COMPLETE: 2270 // Connection management 2271 reverse_bd_addr(&packet[5], addr); 2272 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2273 addr_type = BD_ADDR_TYPE_ACL; 2274 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2275 if (conn) { 2276 if (!packet[2]){ 2277 conn->state = OPEN; 2278 conn->con_handle = little_endian_read_16(packet, 3); 2279 2280 // queue get remote feature 2281 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2282 2283 // queue set supervision timeout if we're master 2284 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2285 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2286 } 2287 2288 // restart timer 2289 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2290 btstack_run_loop_add_timer(&conn->timeout); 2291 2292 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2293 2294 hci_emit_nr_connections_changed(); 2295 } else { 2296 // connection failed 2297 hci_handle_connection_failed(conn, packet[2]); 2298 } 2299 } 2300 break; 2301 2302 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2303 reverse_bd_addr(&packet[5], addr); 2304 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2305 if (packet[2]){ 2306 // connection failed 2307 break; 2308 } 2309 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2310 if (!conn) { 2311 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2312 } 2313 if (!conn) { 2314 break; 2315 } 2316 conn->state = OPEN; 2317 conn->con_handle = little_endian_read_16(packet, 3); 2318 2319 #ifdef ENABLE_SCO_OVER_HCI 2320 // update SCO 2321 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2322 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2323 } 2324 // trigger can send now 2325 if (hci_have_usb_transport()){ 2326 hci_stack->sco_can_send_now = 1; 2327 } 2328 #endif 2329 break; 2330 2331 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2332 handle = little_endian_read_16(packet, 3); 2333 conn = hci_connection_for_handle(handle); 2334 if (!conn) break; 2335 if (!packet[2]){ 2336 const uint8_t * features = &packet[5]; 2337 hci_handle_remote_features_page_0(conn, features); 2338 2339 // read extended features if possible 2340 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2341 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2342 break; 2343 } 2344 } 2345 hci_handle_remote_features_received(conn); 2346 break; 2347 2348 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2349 handle = little_endian_read_16(packet, 3); 2350 conn = hci_connection_for_handle(handle); 2351 if (!conn) break; 2352 // status = ok, page = 1 2353 if (!packet[2]) { 2354 uint8_t page_number = packet[5]; 2355 uint8_t maximum_page_number = packet[6]; 2356 const uint8_t * features = &packet[7]; 2357 bool done = false; 2358 switch (page_number){ 2359 case 1: 2360 hci_handle_remote_features_page_1(conn, features); 2361 if (maximum_page_number >= 2){ 2362 // get Secure Connections (Controller) from Page 2 if available 2363 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2364 } else { 2365 // otherwise, assume SC (Controller) == SC (Host) 2366 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2367 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2368 } 2369 done = true; 2370 } 2371 break; 2372 case 2: 2373 hci_handle_remote_features_page_2(conn, features); 2374 done = true; 2375 break; 2376 default: 2377 break; 2378 } 2379 if (!done) break; 2380 } 2381 hci_handle_remote_features_received(conn); 2382 break; 2383 2384 case HCI_EVENT_LINK_KEY_REQUEST: 2385 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2386 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2387 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2388 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2389 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2390 hci_run(); 2391 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2392 return; 2393 2394 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2395 reverse_bd_addr(&packet[2], addr); 2396 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2397 if (!conn) break; 2398 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2399 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2400 // Change Connection Encryption keeps link key type 2401 if (link_key_type != CHANGED_COMBINATION_KEY){ 2402 conn->link_key_type = link_key_type; 2403 } 2404 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2405 // still forward event to allow dismiss of pairing dialog 2406 break; 2407 } 2408 2409 case HCI_EVENT_PIN_CODE_REQUEST: 2410 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2411 // non-bondable mode: pin code negative reply will be sent 2412 if (!hci_stack->bondable){ 2413 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2414 hci_run(); 2415 return; 2416 } 2417 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2418 if (!hci_stack->link_key_db) break; 2419 hci_event_pin_code_request_get_bd_addr(packet, addr); 2420 hci_stack->link_key_db->delete_link_key(addr); 2421 break; 2422 2423 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2424 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2425 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2426 break; 2427 2428 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2429 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2430 if (!hci_stack->ssp_auto_accept) break; 2431 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2432 break; 2433 2434 case HCI_EVENT_USER_PASSKEY_REQUEST: 2435 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2436 if (!hci_stack->ssp_auto_accept) break; 2437 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2438 break; 2439 case HCI_EVENT_MODE_CHANGE: 2440 handle = hci_event_mode_change_get_handle(packet); 2441 conn = hci_connection_for_handle(handle); 2442 if (!conn) break; 2443 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2444 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2445 break; 2446 #endif 2447 2448 case HCI_EVENT_ENCRYPTION_CHANGE: 2449 handle = hci_event_encryption_change_get_connection_handle(packet); 2450 conn = hci_connection_for_handle(handle); 2451 if (!conn) break; 2452 if (hci_event_encryption_change_get_status(packet) == 0u) { 2453 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2454 if (encryption_enabled){ 2455 if (hci_is_le_connection(conn)){ 2456 // For LE, we accept connection as encrypted 2457 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2458 } 2459 #ifdef ENABLE_CLASSIC 2460 else { 2461 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2462 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2463 bool connected_uses_aes_ccm = encryption_enabled == 2; 2464 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2465 log_info("SC during pairing, but only E0 now -> abort"); 2466 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2467 break; 2468 } 2469 2470 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2471 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2472 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2473 } else { 2474 // if not, pretend everything is perfect 2475 hci_handle_read_encryption_key_size_complete(conn, 16); 2476 } 2477 } 2478 #endif 2479 } else { 2480 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2481 } 2482 } 2483 2484 break; 2485 2486 #ifdef ENABLE_CLASSIC 2487 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2488 handle = hci_event_authentication_complete_get_connection_handle(packet); 2489 conn = hci_connection_for_handle(handle); 2490 if (!conn) break; 2491 2492 // ignore authentication event if we didn't request it 2493 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2494 2495 // dedicated bonding: send result and disconnect 2496 if (conn->bonding_flags & BONDING_DEDICATED){ 2497 conn->bonding_flags &= ~BONDING_DEDICATED; 2498 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2499 conn->bonding_status = packet[2]; 2500 break; 2501 } 2502 2503 // authenticated only if auth status == 0 2504 if (hci_event_authentication_complete_get_status(packet) == 0){ 2505 // authenticated 2506 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2507 2508 // If link key sufficient for requested security and not already encrypted, start encryption 2509 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2510 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2511 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2512 break; 2513 } 2514 } 2515 2516 // emit updated security level 2517 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2518 break; 2519 #endif 2520 2521 // HCI_EVENT_DISCONNECTION_COMPLETE 2522 // has been split, to first notify stack before shutting connection down 2523 // see end of function, too. 2524 case HCI_EVENT_DISCONNECTION_COMPLETE: 2525 if (packet[2]) break; // status != 0 2526 handle = little_endian_read_16(packet, 3); 2527 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2528 if (hci_stack->acl_fragmentation_total_size > 0u) { 2529 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2530 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2531 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2532 hci_stack->acl_fragmentation_total_size = 0; 2533 hci_stack->acl_fragmentation_pos = 0; 2534 if (release_buffer){ 2535 hci_release_packet_buffer(); 2536 } 2537 } 2538 } 2539 2540 conn = hci_connection_for_handle(handle); 2541 if (!conn) break; 2542 // mark connection for shutdown 2543 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2544 2545 // emit dedicatd bonding event 2546 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2547 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2548 } 2549 2550 #ifdef ENABLE_BLE 2551 #ifdef ENABLE_LE_PERIPHERAL 2552 // re-enable advertisements for le connections if active 2553 if (hci_is_le_connection(conn)){ 2554 hci_reenable_advertisements_if_needed(); 2555 } 2556 #endif 2557 #endif 2558 break; 2559 2560 case HCI_EVENT_HARDWARE_ERROR: 2561 log_error("Hardware Error: 0x%02x", packet[2]); 2562 if (hci_stack->hardware_error_callback){ 2563 (*hci_stack->hardware_error_callback)(packet[2]); 2564 } else { 2565 // if no special requests, just reboot stack 2566 hci_power_control_off(); 2567 hci_power_control_on(); 2568 } 2569 break; 2570 2571 #ifdef ENABLE_CLASSIC 2572 case HCI_EVENT_ROLE_CHANGE: 2573 if (packet[2]) break; // status != 0 2574 reverse_bd_addr(&packet[3], addr); 2575 addr_type = BD_ADDR_TYPE_ACL; 2576 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2577 if (!conn) break; 2578 conn->role = packet[9]; 2579 break; 2580 #endif 2581 2582 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2583 // release packet buffer only for asynchronous transport and if there are not further fragements 2584 if (hci_transport_synchronous()) { 2585 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2586 return; // instead of break: to avoid re-entering hci_run() 2587 } 2588 hci_stack->acl_fragmentation_tx_active = 0; 2589 if (hci_stack->acl_fragmentation_total_size) break; 2590 hci_release_packet_buffer(); 2591 2592 // L2CAP receives this event via the hci_emit_event below 2593 2594 #ifdef ENABLE_CLASSIC 2595 // For SCO, we do the can_send_now_check here 2596 hci_notify_if_sco_can_send_now(); 2597 #endif 2598 break; 2599 2600 #ifdef ENABLE_CLASSIC 2601 case HCI_EVENT_SCO_CAN_SEND_NOW: 2602 // For SCO, we do the can_send_now_check here 2603 hci_stack->sco_can_send_now = 1; 2604 hci_notify_if_sco_can_send_now(); 2605 return; 2606 2607 // explode inquriy results for easier consumption 2608 case HCI_EVENT_INQUIRY_RESULT: 2609 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2610 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2611 gap_inquiry_explode(packet, size); 2612 break; 2613 #endif 2614 2615 #ifdef ENABLE_BLE 2616 case HCI_EVENT_LE_META: 2617 switch (packet[2]){ 2618 #ifdef ENABLE_LE_CENTRAL 2619 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2620 // log_info("advertising report received"); 2621 if (!hci_stack->le_scanning_enabled) break; 2622 le_handle_advertisement_report(packet, size); 2623 break; 2624 #endif 2625 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2626 // Connection management 2627 reverse_bd_addr(&packet[8], addr); 2628 addr_type = (bd_addr_type_t)packet[7]; 2629 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2630 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2631 2632 #ifdef ENABLE_LE_CENTRAL 2633 // if auto-connect, remove from whitelist in both roles 2634 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2635 hci_remove_from_whitelist(addr_type, addr); 2636 } 2637 // handle error: error is reported only to the initiator -> outgoing connection 2638 if (packet[3]){ 2639 2640 // handle cancelled outgoing connection 2641 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2642 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2643 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2644 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2645 conn = gap_get_outgoing_connection(); 2646 } 2647 2648 // outgoing connection establishment is done 2649 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2650 // remove entry 2651 if (conn){ 2652 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2653 btstack_memory_hci_connection_free( conn ); 2654 } 2655 break; 2656 } 2657 #endif 2658 // on success, both hosts receive connection complete event 2659 if (packet[6] == HCI_ROLE_MASTER){ 2660 #ifdef ENABLE_LE_CENTRAL 2661 // if we're master, it was an outgoing connection and we're done with it 2662 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2663 #endif 2664 } else { 2665 #ifdef ENABLE_LE_PERIPHERAL 2666 // if we're slave, it was an incoming connection, advertisements have stopped 2667 hci_stack->le_advertisements_active = 0; 2668 #endif 2669 } 2670 // LE connections are auto-accepted, so just create a connection if there isn't one already 2671 if (!conn){ 2672 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2673 } 2674 // no memory, sorry. 2675 if (!conn){ 2676 break; 2677 } 2678 2679 conn->state = OPEN; 2680 conn->role = packet[6]; 2681 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2682 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2683 2684 #ifdef ENABLE_LE_PERIPHERAL 2685 if (packet[6] == HCI_ROLE_SLAVE){ 2686 hci_reenable_advertisements_if_needed(); 2687 } 2688 #endif 2689 2690 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2691 2692 // restart timer 2693 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2694 // btstack_run_loop_add_timer(&conn->timeout); 2695 2696 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2697 2698 hci_emit_nr_connections_changed(); 2699 break; 2700 2701 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2702 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2703 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2704 conn = hci_connection_for_handle(handle); 2705 if (!conn) break; 2706 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2707 break; 2708 2709 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2710 // connection 2711 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2712 conn = hci_connection_for_handle(handle); 2713 if (conn) { 2714 // read arguments 2715 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2716 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2717 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2718 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2719 2720 // validate against current connection parameter range 2721 le_connection_parameter_range_t existing_range; 2722 gap_get_connection_parameter_range(&existing_range); 2723 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2724 if (update_parameter){ 2725 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2726 conn->le_conn_interval_min = le_conn_interval_min; 2727 conn->le_conn_interval_max = le_conn_interval_max; 2728 conn->le_conn_latency = le_conn_latency; 2729 conn->le_supervision_timeout = le_supervision_timeout; 2730 } else { 2731 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2732 } 2733 } 2734 break; 2735 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2736 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2737 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2738 conn = hci_connection_for_handle(handle); 2739 if (conn) { 2740 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2741 } 2742 break; 2743 #endif 2744 default: 2745 break; 2746 } 2747 break; 2748 #endif 2749 case HCI_EVENT_VENDOR_SPECIFIC: 2750 // Vendor specific commands often create vendor specific event instead of num completed packets 2751 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2752 switch (hci_stack->manufacturer){ 2753 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2754 hci_stack->num_cmd_packets = 1; 2755 break; 2756 default: 2757 break; 2758 } 2759 break; 2760 default: 2761 break; 2762 } 2763 2764 handle_event_for_current_stack_state(packet, size); 2765 2766 // notify upper stack 2767 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2768 2769 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2770 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2771 if (!packet[2]){ 2772 handle = little_endian_read_16(packet, 3); 2773 hci_connection_t * aConn = hci_connection_for_handle(handle); 2774 if (aConn) { 2775 // discard connection if app did not trigger a reconnect in the event handler 2776 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2777 hci_shutdown_connection(aConn); 2778 } 2779 } 2780 } 2781 } 2782 2783 // execute main loop 2784 hci_run(); 2785 } 2786 2787 #ifdef ENABLE_CLASSIC 2788 2789 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2790 static void sco_schedule_tx(hci_connection_t * conn); 2791 2792 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2793 log_debug("SCO TX Timeout"); 2794 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2795 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2796 if (!conn) return; 2797 2798 // trigger send 2799 conn->sco_tx_ready = 1; 2800 // extra packet if CVSD but SCO buffer is too short 2801 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2802 conn->sco_tx_ready++; 2803 } 2804 hci_notify_if_sco_can_send_now(); 2805 } 2806 2807 2808 #define SCO_TX_AFTER_RX_MS (6) 2809 2810 static void sco_schedule_tx(hci_connection_t * conn){ 2811 2812 uint32_t now = btstack_run_loop_get_time_ms(); 2813 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2814 int time_delta_ms = sco_tx_ms - now; 2815 2816 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2817 2818 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2819 btstack_run_loop_set_timer(timer, time_delta_ms); 2820 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2821 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2822 btstack_run_loop_add_timer(timer); 2823 } 2824 2825 static void sco_handler(uint8_t * packet, uint16_t size){ 2826 // lookup connection struct 2827 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2828 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2829 if (!conn) return; 2830 2831 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2832 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2833 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2834 packet[2] = 0x3c; 2835 memmove(&packet[3], &packet[23], 63); 2836 size = 63; 2837 } 2838 } 2839 2840 if (hci_have_usb_transport()){ 2841 // Nothing to do 2842 } else { 2843 // 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); 2844 if (hci_stack->synchronous_flow_control_enabled == 0){ 2845 uint32_t now = btstack_run_loop_get_time_ms(); 2846 2847 if (!conn->sco_rx_valid){ 2848 // ignore first 10 packets 2849 conn->sco_rx_count++; 2850 // log_debug("sco rx count %u", conn->sco_rx_count); 2851 if (conn->sco_rx_count == 10) { 2852 // use first timestamp as is and pretent it just started 2853 conn->sco_rx_ms = now; 2854 conn->sco_rx_valid = 1; 2855 conn->sco_rx_count = 0; 2856 sco_schedule_tx(conn); 2857 } 2858 } else { 2859 // track expected arrival timme 2860 conn->sco_rx_count++; 2861 conn->sco_rx_ms += 7; 2862 int delta = (int32_t) (now - conn->sco_rx_ms); 2863 if (delta > 0){ 2864 conn->sco_rx_ms++; 2865 } 2866 // log_debug("sco rx %u", conn->sco_rx_ms); 2867 sco_schedule_tx(conn); 2868 } 2869 } 2870 } 2871 // deliver to app 2872 if (hci_stack->sco_packet_handler) { 2873 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2874 } 2875 2876 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2877 conn->num_packets_completed++; 2878 hci_stack->host_completed_packets = 1; 2879 hci_run(); 2880 #endif 2881 } 2882 #endif 2883 2884 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2885 hci_dump_packet(packet_type, 1, packet, size); 2886 switch (packet_type) { 2887 case HCI_EVENT_PACKET: 2888 event_handler(packet, size); 2889 break; 2890 case HCI_ACL_DATA_PACKET: 2891 acl_handler(packet, size); 2892 break; 2893 #ifdef ENABLE_CLASSIC 2894 case HCI_SCO_DATA_PACKET: 2895 sco_handler(packet, size); 2896 break; 2897 #endif 2898 default: 2899 break; 2900 } 2901 } 2902 2903 /** 2904 * @brief Add event packet handler. 2905 */ 2906 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2907 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2908 } 2909 2910 2911 /** Register HCI packet handlers */ 2912 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2913 hci_stack->acl_packet_handler = handler; 2914 } 2915 2916 #ifdef ENABLE_CLASSIC 2917 /** 2918 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2919 */ 2920 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2921 hci_stack->sco_packet_handler = handler; 2922 } 2923 #endif 2924 2925 static void hci_state_reset(void){ 2926 // no connections yet 2927 hci_stack->connections = NULL; 2928 2929 // keep discoverable/connectable as this has been requested by the client(s) 2930 // hci_stack->discoverable = 0; 2931 // hci_stack->connectable = 0; 2932 // hci_stack->bondable = 1; 2933 // hci_stack->own_addr_type = 0; 2934 2935 // buffer is free 2936 hci_stack->hci_packet_buffer_reserved = 0; 2937 2938 // no pending cmds 2939 hci_stack->decline_reason = 0; 2940 hci_stack->new_scan_enable_value = 0xff; 2941 2942 // LE 2943 #ifdef ENABLE_BLE 2944 memset(hci_stack->le_random_address, 0, 6); 2945 hci_stack->le_random_address_set = 0; 2946 #endif 2947 #ifdef ENABLE_LE_CENTRAL 2948 hci_stack->le_scanning_active = 0; 2949 hci_stack->le_scan_type = 0xff; 2950 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2951 hci_stack->le_whitelist = 0; 2952 hci_stack->le_whitelist_capacity = 0; 2953 #endif 2954 } 2955 2956 #ifdef ENABLE_CLASSIC 2957 /** 2958 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2959 */ 2960 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2961 // store and open remote device db 2962 hci_stack->link_key_db = link_key_db; 2963 if (hci_stack->link_key_db) { 2964 hci_stack->link_key_db->open(); 2965 } 2966 } 2967 #endif 2968 2969 void hci_init(const hci_transport_t *transport, const void *config){ 2970 2971 #ifdef HAVE_MALLOC 2972 if (!hci_stack) { 2973 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2974 } 2975 #else 2976 hci_stack = &hci_stack_static; 2977 #endif 2978 memset(hci_stack, 0, sizeof(hci_stack_t)); 2979 2980 // reference to use transport layer implementation 2981 hci_stack->hci_transport = transport; 2982 2983 // reference to used config 2984 hci_stack->config = config; 2985 2986 // setup pointer for outgoing packet buffer 2987 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2988 2989 // max acl payload size defined in config.h 2990 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2991 2992 // register packet handlers with transport 2993 transport->register_packet_handler(&packet_handler); 2994 2995 hci_stack->state = HCI_STATE_OFF; 2996 2997 // class of device 2998 hci_stack->class_of_device = 0x007a020c; // Smartphone 2999 3000 // bondable by default 3001 hci_stack->bondable = 1; 3002 3003 #ifdef ENABLE_CLASSIC 3004 // classic name 3005 hci_stack->local_name = default_classic_name; 3006 3007 // Master slave policy 3008 hci_stack->master_slave_policy = 1; 3009 3010 // Allow Role Switch 3011 hci_stack->allow_role_switch = 1; 3012 3013 // Default / minimum security level = 2 3014 hci_stack->gap_security_level = LEVEL_2; 3015 3016 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3017 hci_stack->gap_required_encyrption_key_size = 7; 3018 #endif 3019 3020 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3021 hci_stack->ssp_enable = 1; 3022 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3023 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3024 hci_stack->ssp_auto_accept = 1; 3025 3026 // Secure Connections: enable (requires support from Controller) 3027 hci_stack->secure_connections_enable = true; 3028 3029 // voice setting - signed 16 bit pcm data with CVSD over the air 3030 hci_stack->sco_voice_setting = 0x60; 3031 3032 #ifdef ENABLE_LE_CENTRAL 3033 // connection parameter to use for outgoing connections 3034 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3035 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3036 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3037 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3038 hci_stack->le_connection_latency = 4; // 4 3039 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3040 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3041 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3042 3043 // default LE Scanning 3044 hci_stack->le_scan_interval = 0x1e0; 3045 hci_stack->le_scan_window = 0x30; 3046 #endif 3047 3048 #ifdef ENABLE_LE_PERIPHERAL 3049 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3050 #endif 3051 3052 // connection parameter range used to answer connection parameter update requests in l2cap 3053 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3054 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3055 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3056 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3057 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3058 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3059 3060 hci_state_reset(); 3061 } 3062 3063 /** 3064 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3065 */ 3066 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3067 hci_stack->chipset = chipset_driver; 3068 3069 // reset chipset driver - init is also called on power_up 3070 if (hci_stack->chipset && hci_stack->chipset->init){ 3071 hci_stack->chipset->init(hci_stack->config); 3072 } 3073 } 3074 3075 /** 3076 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3077 */ 3078 void hci_set_control(const btstack_control_t *hardware_control){ 3079 // references to used control implementation 3080 hci_stack->control = hardware_control; 3081 // init with transport config 3082 hardware_control->init(hci_stack->config); 3083 } 3084 3085 void hci_close(void){ 3086 // close remote device db 3087 if (hci_stack->link_key_db) { 3088 hci_stack->link_key_db->close(); 3089 } 3090 3091 btstack_linked_list_iterator_t lit; 3092 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3093 while (btstack_linked_list_iterator_has_next(&lit)){ 3094 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3095 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3096 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3097 hci_shutdown_connection(connection); 3098 } 3099 3100 hci_power_control(HCI_POWER_OFF); 3101 3102 #ifdef HAVE_MALLOC 3103 free(hci_stack); 3104 #endif 3105 hci_stack = NULL; 3106 } 3107 3108 #ifdef ENABLE_CLASSIC 3109 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3110 // validate ranage and set 3111 if (encryption_key_size < 7) return; 3112 if (encryption_key_size > 16) return; 3113 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3114 } 3115 3116 void gap_set_security_level(gap_security_level_t security_level){ 3117 hci_stack->gap_security_level = security_level; 3118 } 3119 3120 gap_security_level_t gap_get_security_level(void){ 3121 return hci_stack->gap_security_level; 3122 } 3123 #endif 3124 3125 #ifdef ENABLE_CLASSIC 3126 void gap_set_class_of_device(uint32_t class_of_device){ 3127 hci_stack->class_of_device = class_of_device; 3128 } 3129 3130 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3131 hci_stack->default_link_policy_settings = default_link_policy_settings; 3132 } 3133 3134 void gap_set_allow_role_switch(bool allow_role_switch){ 3135 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3136 } 3137 3138 uint8_t hci_get_allow_role_switch(void){ 3139 return hci_stack->allow_role_switch; 3140 } 3141 3142 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3143 hci_stack->link_supervision_timeout = link_supervision_timeout; 3144 } 3145 3146 void hci_disable_l2cap_timeout_check(void){ 3147 disable_l2cap_timeouts = 1; 3148 } 3149 #endif 3150 3151 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3152 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3153 void hci_set_bd_addr(bd_addr_t addr){ 3154 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3155 hci_stack->custom_bd_addr_set = 1; 3156 } 3157 #endif 3158 3159 // State-Module-Driver overview 3160 // state module low-level 3161 // HCI_STATE_OFF off close 3162 // HCI_STATE_INITIALIZING, on open 3163 // HCI_STATE_WORKING, on open 3164 // HCI_STATE_HALTING, on open 3165 // HCI_STATE_SLEEPING, off/sleep close 3166 // HCI_STATE_FALLING_ASLEEP on open 3167 3168 static int hci_power_control_on(void){ 3169 3170 // power on 3171 int err = 0; 3172 if (hci_stack->control && hci_stack->control->on){ 3173 err = (*hci_stack->control->on)(); 3174 } 3175 if (err){ 3176 log_error( "POWER_ON failed"); 3177 hci_emit_hci_open_failed(); 3178 return err; 3179 } 3180 3181 // int chipset driver 3182 if (hci_stack->chipset && hci_stack->chipset->init){ 3183 hci_stack->chipset->init(hci_stack->config); 3184 } 3185 3186 // init transport 3187 if (hci_stack->hci_transport->init){ 3188 hci_stack->hci_transport->init(hci_stack->config); 3189 } 3190 3191 // open transport 3192 err = hci_stack->hci_transport->open(); 3193 if (err){ 3194 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3195 if (hci_stack->control && hci_stack->control->off){ 3196 (*hci_stack->control->off)(); 3197 } 3198 hci_emit_hci_open_failed(); 3199 return err; 3200 } 3201 return 0; 3202 } 3203 3204 static void hci_power_control_off(void){ 3205 3206 log_info("hci_power_control_off"); 3207 3208 // close low-level device 3209 hci_stack->hci_transport->close(); 3210 3211 log_info("hci_power_control_off - hci_transport closed"); 3212 3213 // power off 3214 if (hci_stack->control && hci_stack->control->off){ 3215 (*hci_stack->control->off)(); 3216 } 3217 3218 log_info("hci_power_control_off - control closed"); 3219 3220 hci_stack->state = HCI_STATE_OFF; 3221 } 3222 3223 static void hci_power_control_sleep(void){ 3224 3225 log_info("hci_power_control_sleep"); 3226 3227 #if 0 3228 // don't close serial port during sleep 3229 3230 // close low-level device 3231 hci_stack->hci_transport->close(hci_stack->config); 3232 #endif 3233 3234 // sleep mode 3235 if (hci_stack->control && hci_stack->control->sleep){ 3236 (*hci_stack->control->sleep)(); 3237 } 3238 3239 hci_stack->state = HCI_STATE_SLEEPING; 3240 } 3241 3242 static int hci_power_control_wake(void){ 3243 3244 log_info("hci_power_control_wake"); 3245 3246 // wake on 3247 if (hci_stack->control && hci_stack->control->wake){ 3248 (*hci_stack->control->wake)(); 3249 } 3250 3251 #if 0 3252 // open low-level device 3253 int err = hci_stack->hci_transport->open(hci_stack->config); 3254 if (err){ 3255 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3256 if (hci_stack->control && hci_stack->control->off){ 3257 (*hci_stack->control->off)(); 3258 } 3259 hci_emit_hci_open_failed(); 3260 return err; 3261 } 3262 #endif 3263 3264 return 0; 3265 } 3266 3267 static void hci_power_transition_to_initializing(void){ 3268 // set up state machine 3269 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3270 hci_stack->hci_packet_buffer_reserved = 0; 3271 hci_stack->state = HCI_STATE_INITIALIZING; 3272 hci_stack->substate = HCI_INIT_SEND_RESET; 3273 } 3274 3275 int hci_power_control(HCI_POWER_MODE power_mode){ 3276 3277 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3278 3279 int err = 0; 3280 switch (hci_stack->state){ 3281 3282 case HCI_STATE_OFF: 3283 switch (power_mode){ 3284 case HCI_POWER_ON: 3285 err = hci_power_control_on(); 3286 if (err) { 3287 log_error("hci_power_control_on() error %d", err); 3288 return err; 3289 } 3290 hci_power_transition_to_initializing(); 3291 break; 3292 case HCI_POWER_OFF: 3293 // do nothing 3294 break; 3295 case HCI_POWER_SLEEP: 3296 // do nothing (with SLEEP == OFF) 3297 break; 3298 } 3299 break; 3300 3301 case HCI_STATE_INITIALIZING: 3302 switch (power_mode){ 3303 case HCI_POWER_ON: 3304 // do nothing 3305 break; 3306 case HCI_POWER_OFF: 3307 // no connections yet, just turn it off 3308 hci_power_control_off(); 3309 break; 3310 case HCI_POWER_SLEEP: 3311 // no connections yet, just turn it off 3312 hci_power_control_sleep(); 3313 break; 3314 } 3315 break; 3316 3317 case HCI_STATE_WORKING: 3318 switch (power_mode){ 3319 case HCI_POWER_ON: 3320 // do nothing 3321 break; 3322 case HCI_POWER_OFF: 3323 // see hci_run 3324 hci_stack->state = HCI_STATE_HALTING; 3325 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3326 break; 3327 case HCI_POWER_SLEEP: 3328 // see hci_run 3329 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3330 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3331 break; 3332 } 3333 break; 3334 3335 case HCI_STATE_HALTING: 3336 switch (power_mode){ 3337 case HCI_POWER_ON: 3338 hci_power_transition_to_initializing(); 3339 break; 3340 case HCI_POWER_OFF: 3341 // do nothing 3342 break; 3343 case HCI_POWER_SLEEP: 3344 // see hci_run 3345 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3346 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3347 break; 3348 } 3349 break; 3350 3351 case HCI_STATE_FALLING_ASLEEP: 3352 switch (power_mode){ 3353 case HCI_POWER_ON: 3354 3355 #ifdef HAVE_PLATFORM_IPHONE_OS 3356 // nothing to do, if H4 supports power management 3357 if (btstack_control_iphone_power_management_enabled()){ 3358 hci_stack->state = HCI_STATE_INITIALIZING; 3359 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3360 break; 3361 } 3362 #endif 3363 hci_power_transition_to_initializing(); 3364 break; 3365 case HCI_POWER_OFF: 3366 // see hci_run 3367 hci_stack->state = HCI_STATE_HALTING; 3368 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3369 break; 3370 case HCI_POWER_SLEEP: 3371 // do nothing 3372 break; 3373 } 3374 break; 3375 3376 case HCI_STATE_SLEEPING: 3377 switch (power_mode){ 3378 case HCI_POWER_ON: 3379 3380 #ifdef HAVE_PLATFORM_IPHONE_OS 3381 // nothing to do, if H4 supports power management 3382 if (btstack_control_iphone_power_management_enabled()){ 3383 hci_stack->state = HCI_STATE_INITIALIZING; 3384 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3385 hci_update_scan_enable(); 3386 break; 3387 } 3388 #endif 3389 err = hci_power_control_wake(); 3390 if (err) return err; 3391 hci_power_transition_to_initializing(); 3392 break; 3393 case HCI_POWER_OFF: 3394 hci_stack->state = HCI_STATE_HALTING; 3395 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3396 break; 3397 case HCI_POWER_SLEEP: 3398 // do nothing 3399 break; 3400 } 3401 break; 3402 } 3403 3404 // create internal event 3405 hci_emit_state(); 3406 3407 // trigger next/first action 3408 hci_run(); 3409 3410 return 0; 3411 } 3412 3413 3414 #ifdef ENABLE_CLASSIC 3415 3416 static void hci_update_scan_enable(void){ 3417 // 2 = page scan, 1 = inq scan 3418 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3419 hci_run(); 3420 } 3421 3422 void gap_discoverable_control(uint8_t enable){ 3423 if (enable) enable = 1; // normalize argument 3424 3425 if (hci_stack->discoverable == enable){ 3426 hci_emit_discoverable_enabled(hci_stack->discoverable); 3427 return; 3428 } 3429 3430 hci_stack->discoverable = enable; 3431 hci_update_scan_enable(); 3432 } 3433 3434 void gap_connectable_control(uint8_t enable){ 3435 if (enable) enable = 1; // normalize argument 3436 3437 // don't emit event 3438 if (hci_stack->connectable == enable) return; 3439 3440 hci_stack->connectable = enable; 3441 hci_update_scan_enable(); 3442 } 3443 #endif 3444 3445 void gap_local_bd_addr(bd_addr_t address_buffer){ 3446 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3447 } 3448 3449 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3450 static void hci_host_num_completed_packets(void){ 3451 3452 // create packet manually as arrays are not supported and num_commands should not get reduced 3453 hci_reserve_packet_buffer(); 3454 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3455 3456 uint16_t size = 0; 3457 uint16_t num_handles = 0; 3458 packet[size++] = 0x35; 3459 packet[size++] = 0x0c; 3460 size++; // skip param len 3461 size++; // skip num handles 3462 3463 // add { handle, packets } entries 3464 btstack_linked_item_t * it; 3465 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3466 hci_connection_t * connection = (hci_connection_t *) it; 3467 if (connection->num_packets_completed){ 3468 little_endian_store_16(packet, size, connection->con_handle); 3469 size += 2; 3470 little_endian_store_16(packet, size, connection->num_packets_completed); 3471 size += 2; 3472 // 3473 num_handles++; 3474 connection->num_packets_completed = 0; 3475 } 3476 } 3477 3478 packet[2] = size - 3; 3479 packet[3] = num_handles; 3480 3481 hci_stack->host_completed_packets = 0; 3482 3483 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3484 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3485 3486 // release packet buffer for synchronous transport implementations 3487 if (hci_transport_synchronous()){ 3488 hci_release_packet_buffer(); 3489 hci_emit_transport_packet_sent(); 3490 } 3491 } 3492 #endif 3493 3494 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3495 UNUSED(ds); 3496 hci_stack->substate = HCI_HALTING_CLOSE; 3497 // allow packet handlers to defer final shutdown 3498 hci_emit_state(); 3499 hci_run(); 3500 } 3501 3502 static bool hci_run_acl_fragments(void){ 3503 if (hci_stack->acl_fragmentation_total_size > 0u) { 3504 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3505 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3506 if (connection) { 3507 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3508 hci_send_acl_packet_fragments(connection); 3509 return true; 3510 } 3511 } else { 3512 // connection gone -> discard further fragments 3513 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3514 hci_stack->acl_fragmentation_total_size = 0; 3515 hci_stack->acl_fragmentation_pos = 0; 3516 } 3517 } 3518 return false; 3519 } 3520 3521 #ifdef ENABLE_CLASSIC 3522 static bool hci_run_general_gap_classic(void){ 3523 3524 // decline incoming connections 3525 if (hci_stack->decline_reason){ 3526 uint8_t reason = hci_stack->decline_reason; 3527 hci_stack->decline_reason = 0; 3528 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3529 return true; 3530 } 3531 // send scan enable 3532 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3533 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3534 hci_stack->new_scan_enable_value = 0xff; 3535 return true; 3536 } 3537 // start/stop inquiry 3538 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3539 uint8_t duration = hci_stack->inquiry_state; 3540 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3541 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3542 return true; 3543 } 3544 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3545 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3546 hci_send_cmd(&hci_inquiry_cancel); 3547 return true; 3548 } 3549 // remote name request 3550 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3551 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3552 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3553 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3554 return true; 3555 } 3556 // pairing 3557 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3558 uint8_t state = hci_stack->gap_pairing_state; 3559 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3560 switch (state){ 3561 case GAP_PAIRING_STATE_SEND_PIN: 3562 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); 3563 break; 3564 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3565 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3566 break; 3567 case GAP_PAIRING_STATE_SEND_PASSKEY: 3568 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3569 break; 3570 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3571 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3572 break; 3573 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3574 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3575 break; 3576 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3577 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3578 break; 3579 default: 3580 break; 3581 } 3582 return true; 3583 } 3584 return false; 3585 } 3586 #endif 3587 3588 #ifdef ENABLE_BLE 3589 static bool hci_run_general_gap_le(void){ 3590 3591 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3592 3593 if (hci_stack->state != HCI_STATE_WORKING) return false; 3594 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3595 3596 #ifdef ENABLE_LE_CENTRAL 3597 // parameter change requires scanning to be stopped first 3598 if (hci_stack->le_scan_type != 0xffu) { 3599 if (hci_stack->le_scanning_active){ 3600 hci_stack->le_scanning_active = 0; 3601 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3602 } else { 3603 int scan_type = (int) hci_stack->le_scan_type; 3604 hci_stack->le_scan_type = 0xff; 3605 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); 3606 } 3607 return true; 3608 } 3609 // finally, we can enable/disable le scan 3610 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3611 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3612 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3613 return true; 3614 } 3615 #endif 3616 #ifdef ENABLE_LE_PERIPHERAL 3617 // le advertisement control 3618 if (hci_stack->le_advertisements_todo){ 3619 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3620 } 3621 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3622 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3623 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3624 return true; 3625 } 3626 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3627 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3628 hci_send_cmd(&hci_le_set_advertising_parameters, 3629 hci_stack->le_advertisements_interval_min, 3630 hci_stack->le_advertisements_interval_max, 3631 hci_stack->le_advertisements_type, 3632 hci_stack->le_own_addr_type, 3633 hci_stack->le_advertisements_direct_address_type, 3634 hci_stack->le_advertisements_direct_address, 3635 hci_stack->le_advertisements_channel_map, 3636 hci_stack->le_advertisements_filter_policy); 3637 return true; 3638 } 3639 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3640 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3641 uint8_t adv_data_clean[31]; 3642 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3643 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3644 hci_stack->le_advertisements_data_len); 3645 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3646 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3647 return true; 3648 } 3649 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3650 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3651 uint8_t scan_data_clean[31]; 3652 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3653 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3654 hci_stack->le_scan_response_data_len); 3655 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3656 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3657 return true; 3658 } 3659 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3660 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3661 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3662 return true; 3663 } 3664 #endif 3665 3666 #ifdef ENABLE_LE_CENTRAL 3667 // 3668 // LE Whitelist Management 3669 // 3670 3671 // check if whitelist needs modification 3672 btstack_linked_list_iterator_t lit; 3673 int modification_pending = 0; 3674 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3675 while (btstack_linked_list_iterator_has_next(&lit)){ 3676 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3677 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3678 modification_pending = 1; 3679 break; 3680 } 3681 } 3682 3683 if (modification_pending){ 3684 // stop connnecting if modification pending 3685 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3686 hci_send_cmd(&hci_le_create_connection_cancel); 3687 return true; 3688 } 3689 3690 // add/remove entries 3691 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3692 while (btstack_linked_list_iterator_has_next(&lit)){ 3693 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3694 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3695 entry->state = LE_WHITELIST_ON_CONTROLLER; 3696 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3697 return true; 3698 } 3699 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3700 bd_addr_t address; 3701 bd_addr_type_t address_type = entry->address_type; 3702 (void)memcpy(address, entry->address, 6); 3703 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3704 btstack_memory_whitelist_entry_free(entry); 3705 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3706 return true; 3707 } 3708 } 3709 } 3710 3711 // start connecting 3712 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3713 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3714 bd_addr_t null_addr; 3715 memset(null_addr, 0, 6); 3716 hci_send_cmd(&hci_le_create_connection, 3717 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3718 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3719 1, // use whitelist 3720 0, // peer address type 3721 null_addr, // peer bd addr 3722 hci_stack->le_own_addr_type, // our addr type: 3723 hci_stack->le_connection_interval_min, // conn interval min 3724 hci_stack->le_connection_interval_max, // conn interval max 3725 hci_stack->le_connection_latency, // conn latency 3726 hci_stack->le_supervision_timeout, // conn latency 3727 hci_stack->le_minimum_ce_length, // min ce length 3728 hci_stack->le_maximum_ce_length // max ce length 3729 ); 3730 return true; 3731 } 3732 #endif 3733 return false; 3734 } 3735 #endif 3736 3737 static bool hci_run_general_pending_commmands(void){ 3738 btstack_linked_item_t * it; 3739 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3740 hci_connection_t * connection = (hci_connection_t *) it; 3741 3742 switch(connection->state){ 3743 case SEND_CREATE_CONNECTION: 3744 switch(connection->address_type){ 3745 #ifdef ENABLE_CLASSIC 3746 case BD_ADDR_TYPE_ACL: 3747 log_info("sending hci_create_connection"); 3748 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3749 break; 3750 #endif 3751 default: 3752 #ifdef ENABLE_BLE 3753 #ifdef ENABLE_LE_CENTRAL 3754 // track outgoing connection 3755 hci_stack->outgoing_addr_type = connection->address_type; 3756 (void)memcpy(hci_stack->outgoing_addr, 3757 connection->address, 6); 3758 log_info("sending hci_le_create_connection"); 3759 hci_send_cmd(&hci_le_create_connection, 3760 hci_stack->le_connection_scan_interval, // conn scan interval 3761 hci_stack->le_connection_scan_window, // conn scan windows 3762 0, // don't use whitelist 3763 connection->address_type, // peer address type 3764 connection->address, // peer bd addr 3765 hci_stack->le_own_addr_type, // our addr type: 3766 hci_stack->le_connection_interval_min, // conn interval min 3767 hci_stack->le_connection_interval_max, // conn interval max 3768 hci_stack->le_connection_latency, // conn latency 3769 hci_stack->le_supervision_timeout, // conn latency 3770 hci_stack->le_minimum_ce_length, // min ce length 3771 hci_stack->le_maximum_ce_length // max ce length 3772 ); 3773 connection->state = SENT_CREATE_CONNECTION; 3774 #endif 3775 #endif 3776 break; 3777 } 3778 return true; 3779 3780 #ifdef ENABLE_CLASSIC 3781 case RECEIVED_CONNECTION_REQUEST: 3782 connection->role = HCI_ROLE_SLAVE; 3783 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3784 log_info("sending hci_accept_connection_request"); 3785 connection->state = ACCEPTED_CONNECTION_REQUEST; 3786 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3787 } 3788 return true; 3789 #endif 3790 3791 #ifdef ENABLE_BLE 3792 #ifdef ENABLE_LE_CENTRAL 3793 case SEND_CANCEL_CONNECTION: 3794 connection->state = SENT_CANCEL_CONNECTION; 3795 hci_send_cmd(&hci_le_create_connection_cancel); 3796 return true; 3797 #endif 3798 #endif 3799 case SEND_DISCONNECT: 3800 connection->state = SENT_DISCONNECT; 3801 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3802 return true; 3803 3804 default: 3805 break; 3806 } 3807 3808 // no further commands if connection is about to get shut down 3809 if (connection->state == SENT_DISCONNECT) continue; 3810 3811 if (connection->authentication_flags & READ_RSSI){ 3812 connectionClearAuthenticationFlags(connection, READ_RSSI); 3813 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3814 return true; 3815 } 3816 3817 #ifdef ENABLE_CLASSIC 3818 3819 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3820 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3821 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3822 return true; 3823 } 3824 3825 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3826 log_info("responding to link key request"); 3827 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3828 3829 link_key_t link_key; 3830 link_key_type_t link_key_type; 3831 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3832 3833 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3834 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3835 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3836 if (sc_downgrade){ 3837 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3838 connection->state = SENT_DISCONNECT; 3839 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3840 return true; 3841 } 3842 3843 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3844 if (have_link_key && security_level_sufficient){ 3845 connection->link_key_type = link_key_type; 3846 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3847 } else { 3848 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3849 } 3850 return true; 3851 } 3852 3853 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3854 log_info("denying to pin request"); 3855 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3856 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3857 return true; 3858 } 3859 3860 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3861 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3862 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3863 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3864 // tweak authentication requirements 3865 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3866 if (connection->bonding_flags & BONDING_DEDICATED){ 3867 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3868 } 3869 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3870 authreq |= 1; 3871 } 3872 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3873 } else { 3874 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3875 } 3876 return true; 3877 } 3878 3879 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3880 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3881 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3882 return true; 3883 } 3884 3885 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3886 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3887 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3888 return true; 3889 } 3890 3891 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3892 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3893 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3894 return true; 3895 } 3896 3897 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3898 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3899 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3900 return true; 3901 } 3902 3903 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3904 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3905 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3906 return true; 3907 } 3908 3909 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3910 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3911 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3912 connection->state = SENT_DISCONNECT; 3913 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3914 return true; 3915 } 3916 3917 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3918 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3919 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3920 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3921 return true; 3922 } 3923 3924 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3925 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3926 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3927 return true; 3928 } 3929 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3930 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3931 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3932 return true; 3933 } 3934 #endif 3935 3936 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3937 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3938 if (connection->state != SENT_DISCONNECT){ 3939 connection->state = SENT_DISCONNECT; 3940 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3941 return true; 3942 } 3943 } 3944 3945 #ifdef ENABLE_CLASSIC 3946 uint16_t sniff_min_interval; 3947 switch (connection->sniff_min_interval){ 3948 case 0: 3949 break; 3950 case 0xffff: 3951 connection->sniff_min_interval = 0; 3952 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3953 return true; 3954 default: 3955 sniff_min_interval = connection->sniff_min_interval; 3956 connection->sniff_min_interval = 0; 3957 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3958 return true; 3959 } 3960 #endif 3961 3962 #ifdef ENABLE_BLE 3963 switch (connection->le_con_parameter_update_state){ 3964 // response to L2CAP CON PARAMETER UPDATE REQUEST 3965 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3966 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3967 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3968 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3969 0x0000, 0xffff); 3970 return true; 3971 case CON_PARAMETER_UPDATE_REPLY: 3972 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3973 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3974 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3975 0x0000, 0xffff); 3976 return true; 3977 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3978 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3979 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3980 return true; 3981 default: 3982 break; 3983 } 3984 if (connection->le_phy_update_all_phys != 0xffu){ 3985 uint8_t all_phys = connection->le_phy_update_all_phys; 3986 connection->le_phy_update_all_phys = 0xff; 3987 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); 3988 return true; 3989 } 3990 #endif 3991 } 3992 return false; 3993 } 3994 3995 static void hci_run(void){ 3996 3997 bool done; 3998 3999 // send continuation fragments first, as they block the prepared packet buffer 4000 done = hci_run_acl_fragments(); 4001 if (done) return; 4002 4003 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4004 // send host num completed packets next as they don't require num_cmd_packets > 0 4005 if (!hci_can_send_comand_packet_transport()) return; 4006 if (hci_stack->host_completed_packets){ 4007 hci_host_num_completed_packets(); 4008 return; 4009 } 4010 #endif 4011 4012 if (!hci_can_send_command_packet_now()) return; 4013 4014 // global/non-connection oriented commands 4015 4016 4017 #ifdef ENABLE_CLASSIC 4018 // general gap classic 4019 done = hci_run_general_gap_classic(); 4020 if (done) return; 4021 #endif 4022 4023 #ifdef ENABLE_BLE 4024 // general gap le 4025 done = hci_run_general_gap_le(); 4026 if (done) return; 4027 #endif 4028 4029 // send pending HCI commands 4030 done = hci_run_general_pending_commmands(); 4031 if (done) return; 4032 4033 // stack state sub statemachines 4034 hci_connection_t * connection; 4035 switch (hci_stack->state){ 4036 case HCI_STATE_INITIALIZING: 4037 hci_initializing_run(); 4038 break; 4039 4040 case HCI_STATE_HALTING: 4041 4042 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4043 switch (hci_stack->substate){ 4044 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4045 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4046 4047 #ifdef ENABLE_BLE 4048 #ifdef ENABLE_LE_CENTRAL 4049 // free whitelist entries 4050 { 4051 btstack_linked_list_iterator_t lit; 4052 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4053 while (btstack_linked_list_iterator_has_next(&lit)){ 4054 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4055 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4056 btstack_memory_whitelist_entry_free(entry); 4057 } 4058 } 4059 #endif 4060 #endif 4061 // close all open connections 4062 connection = (hci_connection_t *) hci_stack->connections; 4063 if (connection){ 4064 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4065 if (!hci_can_send_command_packet_now()) return; 4066 4067 // check state 4068 if (connection->state == SENT_DISCONNECT) return; 4069 connection->state = SENT_DISCONNECT; 4070 4071 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4072 4073 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4074 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4075 4076 // ... which would be ignored anyway as we shutdown (free) the connection now 4077 hci_shutdown_connection(connection); 4078 4079 // finally, send the disconnect command 4080 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4081 return; 4082 } 4083 4084 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4085 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4086 log_info("HCI_STATE_HALTING: wait 50 ms"); 4087 hci_stack->substate = HCI_HALTING_W4_TIMER; 4088 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4089 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4090 btstack_run_loop_add_timer(&hci_stack->timeout); 4091 break; 4092 } 4093 4094 /* fall through */ 4095 4096 case HCI_HALTING_CLOSE: 4097 log_info("HCI_STATE_HALTING, calling off"); 4098 4099 // switch mode 4100 hci_power_control_off(); 4101 4102 log_info("HCI_STATE_HALTING, emitting state"); 4103 hci_emit_state(); 4104 log_info("HCI_STATE_HALTING, done"); 4105 break; 4106 4107 case HCI_HALTING_W4_TIMER: 4108 // keep waiting 4109 4110 break; 4111 default: 4112 break; 4113 } 4114 4115 break; 4116 4117 case HCI_STATE_FALLING_ASLEEP: 4118 switch(hci_stack->substate) { 4119 case HCI_FALLING_ASLEEP_DISCONNECT: 4120 log_info("HCI_STATE_FALLING_ASLEEP"); 4121 // close all open connections 4122 connection = (hci_connection_t *) hci_stack->connections; 4123 4124 #ifdef HAVE_PLATFORM_IPHONE_OS 4125 // don't close connections, if H4 supports power management 4126 if (btstack_control_iphone_power_management_enabled()){ 4127 connection = NULL; 4128 } 4129 #endif 4130 if (connection){ 4131 4132 // send disconnect 4133 if (!hci_can_send_command_packet_now()) return; 4134 4135 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4136 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4137 4138 // send disconnected event right away - causes higher layer connections to get closed, too. 4139 hci_shutdown_connection(connection); 4140 return; 4141 } 4142 4143 if (hci_classic_supported()){ 4144 // disable page and inquiry scan 4145 if (!hci_can_send_command_packet_now()) return; 4146 4147 log_info("HCI_STATE_HALTING, disabling inq scans"); 4148 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4149 4150 // continue in next sub state 4151 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4152 break; 4153 } 4154 4155 /* fall through */ 4156 4157 case HCI_FALLING_ASLEEP_COMPLETE: 4158 log_info("HCI_STATE_HALTING, calling sleep"); 4159 #ifdef HAVE_PLATFORM_IPHONE_OS 4160 // don't actually go to sleep, if H4 supports power management 4161 if (btstack_control_iphone_power_management_enabled()){ 4162 // SLEEP MODE reached 4163 hci_stack->state = HCI_STATE_SLEEPING; 4164 hci_emit_state(); 4165 break; 4166 } 4167 #endif 4168 // switch mode 4169 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4170 hci_emit_state(); 4171 break; 4172 4173 default: 4174 break; 4175 } 4176 break; 4177 4178 default: 4179 break; 4180 } 4181 } 4182 4183 int hci_send_cmd_packet(uint8_t *packet, int size){ 4184 // house-keeping 4185 4186 #ifdef ENABLE_CLASSIC 4187 bd_addr_t addr; 4188 hci_connection_t * conn; 4189 #endif 4190 #ifdef ENABLE_LE_CENTRAL 4191 uint8_t initiator_filter_policy; 4192 #endif 4193 4194 uint16_t opcode = little_endian_read_16(packet, 0); 4195 switch (opcode) { 4196 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4197 hci_stack->loopback_mode = packet[3]; 4198 break; 4199 4200 #ifdef ENABLE_CLASSIC 4201 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4202 reverse_bd_addr(&packet[3], addr); 4203 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4204 4205 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4206 if (!conn) { 4207 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4208 if (!conn) { 4209 // notify client that alloc failed 4210 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4211 return -1; // packet not sent to controller 4212 } 4213 conn->state = SEND_CREATE_CONNECTION; 4214 } 4215 log_info("conn state %u", conn->state); 4216 switch (conn->state) { 4217 // if connection active exists 4218 case OPEN: 4219 // and OPEN, emit connection complete command 4220 hci_emit_connection_complete(addr, conn->con_handle, 0); 4221 return -1; // packet not sent to controller 4222 case RECEIVED_DISCONNECTION_COMPLETE: 4223 // create connection triggered in disconnect complete event, let's do it now 4224 break; 4225 case SEND_CREATE_CONNECTION: 4226 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4227 break; 4228 default: 4229 // otherwise, just ignore as it is already in the open process 4230 return -1; // packet not sent to controller 4231 } 4232 conn->state = SENT_CREATE_CONNECTION; 4233 4234 // track outgoing connection 4235 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4236 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4237 break; 4238 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4239 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4240 break; 4241 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4242 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4243 break; 4244 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4245 if (hci_stack->link_key_db) { 4246 reverse_bd_addr(&packet[3], addr); 4247 hci_stack->link_key_db->delete_link_key(addr); 4248 } 4249 break; 4250 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4251 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4252 reverse_bd_addr(&packet[3], addr); 4253 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4254 if (conn) { 4255 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4256 } 4257 break; 4258 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4259 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4260 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4261 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4262 reverse_bd_addr(&packet[3], addr); 4263 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4264 if (conn) { 4265 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4266 } 4267 break; 4268 4269 #ifdef ENABLE_SCO_OVER_HCI 4270 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4271 // setup_synchronous_connection? Voice setting at offset 22 4272 // TODO: compare to current setting if sco connection already active 4273 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4274 break; 4275 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4276 // accept_synchronus_connection? Voice setting at offset 18 4277 // TODO: compare to current setting if sco connection already active 4278 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4279 break; 4280 #endif 4281 #endif 4282 4283 #ifdef ENABLE_BLE 4284 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4285 hci_stack->le_random_address_set = 1; 4286 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4287 break; 4288 #ifdef ENABLE_LE_PERIPHERAL 4289 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4290 hci_stack->le_advertisements_active = packet[3]; 4291 break; 4292 #endif 4293 #ifdef ENABLE_LE_CENTRAL 4294 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4295 // white list used? 4296 initiator_filter_policy = packet[7]; 4297 switch (initiator_filter_policy) { 4298 case 0: 4299 // whitelist not used 4300 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4301 break; 4302 case 1: 4303 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4304 break; 4305 default: 4306 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4307 break; 4308 } 4309 break; 4310 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4311 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4312 break; 4313 #endif 4314 #endif 4315 default: 4316 break; 4317 } 4318 4319 hci_stack->num_cmd_packets--; 4320 4321 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4322 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4323 } 4324 4325 // disconnect because of security block 4326 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4327 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4328 if (!connection) return; 4329 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4330 } 4331 4332 4333 // Configure Secure Simple Pairing 4334 4335 #ifdef ENABLE_CLASSIC 4336 4337 // enable will enable SSP during init 4338 void gap_ssp_set_enable(int enable){ 4339 hci_stack->ssp_enable = enable; 4340 } 4341 4342 static int hci_local_ssp_activated(void){ 4343 return gap_ssp_supported() && hci_stack->ssp_enable; 4344 } 4345 4346 // if set, BTstack will respond to io capability request using authentication requirement 4347 void gap_ssp_set_io_capability(int io_capability){ 4348 hci_stack->ssp_io_capability = io_capability; 4349 } 4350 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4351 hci_stack->ssp_authentication_requirement = authentication_requirement; 4352 } 4353 4354 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4355 void gap_ssp_set_auto_accept(int auto_accept){ 4356 hci_stack->ssp_auto_accept = auto_accept; 4357 } 4358 4359 void gap_secure_connections_enable(bool enable){ 4360 hci_stack->secure_connections_enable = enable; 4361 } 4362 4363 #endif 4364 4365 // va_list part of hci_send_cmd 4366 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4367 if (!hci_can_send_command_packet_now()){ 4368 log_error("hci_send_cmd called but cannot send packet now"); 4369 return 0; 4370 } 4371 4372 // for HCI INITIALIZATION 4373 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4374 hci_stack->last_cmd_opcode = cmd->opcode; 4375 4376 hci_reserve_packet_buffer(); 4377 uint8_t * packet = hci_stack->hci_packet_buffer; 4378 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4379 int err = hci_send_cmd_packet(packet, size); 4380 4381 // release packet buffer on error or for synchronous transport implementations 4382 if ((err < 0) || hci_transport_synchronous()){ 4383 hci_release_packet_buffer(); 4384 hci_emit_transport_packet_sent(); 4385 } 4386 4387 return err; 4388 } 4389 4390 /** 4391 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4392 */ 4393 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4394 va_list argptr; 4395 va_start(argptr, cmd); 4396 int res = hci_send_cmd_va_arg(cmd, argptr); 4397 va_end(argptr); 4398 return res; 4399 } 4400 4401 // Create various non-HCI events. 4402 // TODO: generalize, use table similar to hci_create_command 4403 4404 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4405 // dump packet 4406 if (dump) { 4407 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4408 } 4409 4410 // dispatch to all event handlers 4411 btstack_linked_list_iterator_t it; 4412 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4413 while (btstack_linked_list_iterator_has_next(&it)){ 4414 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4415 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4416 } 4417 } 4418 4419 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4420 if (!hci_stack->acl_packet_handler) return; 4421 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4422 } 4423 4424 #ifdef ENABLE_CLASSIC 4425 static void hci_notify_if_sco_can_send_now(void){ 4426 // notify SCO sender if waiting 4427 if (!hci_stack->sco_waiting_for_can_send_now) return; 4428 if (hci_can_send_sco_packet_now()){ 4429 hci_stack->sco_waiting_for_can_send_now = 0; 4430 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4431 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4432 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4433 } 4434 } 4435 4436 // parsing end emitting has been merged to reduce code size 4437 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4438 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4439 4440 uint8_t * eir_data; 4441 ad_context_t context; 4442 const uint8_t * name; 4443 uint8_t name_len; 4444 4445 if (size < 3) return; 4446 4447 int event_type = hci_event_packet_get_type(packet); 4448 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4449 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4450 4451 switch (event_type){ 4452 case HCI_EVENT_INQUIRY_RESULT: 4453 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4454 if (size != (3 + (num_responses * 14))) return; 4455 break; 4456 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4457 if (size != 257) return; 4458 if (num_responses != 1) return; 4459 break; 4460 default: 4461 return; 4462 } 4463 4464 // event[1] is set at the end 4465 int i; 4466 for (i=0; i<num_responses;i++){ 4467 memset(event, 0, sizeof(event)); 4468 event[0] = GAP_EVENT_INQUIRY_RESULT; 4469 uint8_t event_size = 18; // if name is not set by EIR 4470 4471 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4472 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4473 (void)memcpy(&event[9], 4474 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4475 3); // class of device 4476 (void)memcpy(&event[12], 4477 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4478 2); // clock offset 4479 4480 switch (event_type){ 4481 case HCI_EVENT_INQUIRY_RESULT: 4482 // 14,15,16,17 = 0, size 18 4483 break; 4484 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4485 event[14] = 1; 4486 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4487 // 16,17 = 0, size 18 4488 break; 4489 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4490 event[14] = 1; 4491 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4492 // EIR packets only contain a single inquiry response 4493 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4494 name = NULL; 4495 // Iterate over EIR data 4496 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4497 uint8_t data_type = ad_iterator_get_data_type(&context); 4498 uint8_t data_size = ad_iterator_get_data_len(&context); 4499 const uint8_t * data = ad_iterator_get_data(&context); 4500 // Prefer Complete Local Name over Shortend Local Name 4501 switch (data_type){ 4502 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4503 if (name) continue; 4504 /* fall through */ 4505 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4506 name = data; 4507 name_len = data_size; 4508 break; 4509 default: 4510 break; 4511 } 4512 } 4513 if (name){ 4514 event[16] = 1; 4515 // truncate name if needed 4516 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4517 event[17] = len; 4518 (void)memcpy(&event[18], name, len); 4519 event_size += len; 4520 } 4521 break; 4522 } 4523 event[1] = event_size - 2; 4524 hci_emit_event(event, event_size, 1); 4525 } 4526 } 4527 #endif 4528 4529 void hci_emit_state(void){ 4530 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4531 uint8_t event[3]; 4532 event[0] = BTSTACK_EVENT_STATE; 4533 event[1] = sizeof(event) - 2u; 4534 event[2] = hci_stack->state; 4535 hci_emit_event(event, sizeof(event), 1); 4536 } 4537 4538 #ifdef ENABLE_CLASSIC 4539 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4540 uint8_t event[13]; 4541 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4542 event[1] = sizeof(event) - 2; 4543 event[2] = status; 4544 little_endian_store_16(event, 3, con_handle); 4545 reverse_bd_addr(address, &event[5]); 4546 event[11] = 1; // ACL connection 4547 event[12] = 0; // encryption disabled 4548 hci_emit_event(event, sizeof(event), 1); 4549 } 4550 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4551 if (disable_l2cap_timeouts) return; 4552 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4553 uint8_t event[4]; 4554 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4555 event[1] = sizeof(event) - 2; 4556 little_endian_store_16(event, 2, conn->con_handle); 4557 hci_emit_event(event, sizeof(event), 1); 4558 } 4559 #endif 4560 4561 #ifdef ENABLE_BLE 4562 #ifdef ENABLE_LE_CENTRAL 4563 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4564 uint8_t event[21]; 4565 event[0] = HCI_EVENT_LE_META; 4566 event[1] = sizeof(event) - 2u; 4567 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4568 event[3] = status; 4569 little_endian_store_16(event, 4, con_handle); 4570 event[6] = 0; // TODO: role 4571 event[7] = address_type; 4572 reverse_bd_addr(address, &event[8]); 4573 little_endian_store_16(event, 14, 0); // interval 4574 little_endian_store_16(event, 16, 0); // latency 4575 little_endian_store_16(event, 18, 0); // supervision timeout 4576 event[20] = 0; // master clock accuracy 4577 hci_emit_event(event, sizeof(event), 1); 4578 } 4579 #endif 4580 #endif 4581 4582 static void hci_emit_transport_packet_sent(void){ 4583 // notify upper stack that it might be possible to send again 4584 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4585 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4586 } 4587 4588 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4589 uint8_t event[6]; 4590 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4591 event[1] = sizeof(event) - 2u; 4592 event[2] = 0; // status = OK 4593 little_endian_store_16(event, 3, con_handle); 4594 event[5] = reason; 4595 hci_emit_event(event, sizeof(event), 1); 4596 } 4597 4598 static void hci_emit_nr_connections_changed(void){ 4599 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4600 uint8_t event[3]; 4601 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4602 event[1] = sizeof(event) - 2u; 4603 event[2] = nr_hci_connections(); 4604 hci_emit_event(event, sizeof(event), 1); 4605 } 4606 4607 static void hci_emit_hci_open_failed(void){ 4608 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4609 uint8_t event[2]; 4610 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4611 event[1] = sizeof(event) - 2u; 4612 hci_emit_event(event, sizeof(event), 1); 4613 } 4614 4615 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4616 log_info("hci_emit_dedicated_bonding_result %u ", status); 4617 uint8_t event[9]; 4618 int pos = 0; 4619 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4620 event[pos++] = sizeof(event) - 2u; 4621 event[pos++] = status; 4622 reverse_bd_addr(address, &event[pos]); 4623 hci_emit_event(event, sizeof(event), 1); 4624 } 4625 4626 4627 #ifdef ENABLE_CLASSIC 4628 4629 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4630 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4631 uint8_t event[5]; 4632 int pos = 0; 4633 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4634 event[pos++] = sizeof(event) - 2; 4635 little_endian_store_16(event, 2, con_handle); 4636 pos += 2; 4637 event[pos++] = level; 4638 hci_emit_event(event, sizeof(event), 1); 4639 } 4640 4641 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4642 if (!connection) return LEVEL_0; 4643 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4644 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4645 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4646 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4647 // LEVEL 4 always requires 128 bit encrytion key size 4648 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4649 security_level = LEVEL_3; 4650 } 4651 return security_level; 4652 } 4653 4654 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4655 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4656 uint8_t event[3]; 4657 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4658 event[1] = sizeof(event) - 2; 4659 event[2] = enabled; 4660 hci_emit_event(event, sizeof(event), 1); 4661 } 4662 4663 // query if remote side supports eSCO 4664 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4665 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4666 if (!connection) return 0; 4667 return (connection->remote_supported_features[0] & 1) != 0; 4668 } 4669 4670 static bool hci_ssp_supported(hci_connection_t * connection){ 4671 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4672 return (connection->bonding_flags & mask) == mask; 4673 } 4674 4675 // query if remote side supports SSP 4676 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4677 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4678 if (!connection) return 0; 4679 return hci_ssp_supported(connection) ? 1 : 0; 4680 } 4681 4682 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4683 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4684 } 4685 4686 // GAP API 4687 /** 4688 * @bbrief enable/disable bonding. default is enabled 4689 * @praram enabled 4690 */ 4691 void gap_set_bondable_mode(int enable){ 4692 hci_stack->bondable = enable ? 1 : 0; 4693 } 4694 /** 4695 * @brief Get bondable mode. 4696 * @return 1 if bondable 4697 */ 4698 int gap_get_bondable_mode(void){ 4699 return hci_stack->bondable; 4700 } 4701 4702 /** 4703 * @brief map link keys to security levels 4704 */ 4705 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4706 switch (link_key_type){ 4707 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4708 return LEVEL_4; 4709 case COMBINATION_KEY: 4710 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4711 return LEVEL_3; 4712 default: 4713 return LEVEL_2; 4714 } 4715 } 4716 4717 /** 4718 * @brief map link keys to secure connection yes/no 4719 */ 4720 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4721 switch (link_key_type){ 4722 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4723 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4724 return 1; 4725 default: 4726 return 0; 4727 } 4728 } 4729 4730 /** 4731 * @brief map link keys to authenticated 4732 */ 4733 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4734 switch (link_key_type){ 4735 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4736 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4737 return 1; 4738 default: 4739 return 0; 4740 } 4741 } 4742 4743 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4744 log_info("gap_mitm_protection_required_for_security_level %u", level); 4745 return level > LEVEL_2; 4746 } 4747 4748 /** 4749 * @brief get current security level 4750 */ 4751 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4752 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4753 if (!connection) return LEVEL_0; 4754 return gap_security_level_for_connection(connection); 4755 } 4756 4757 /** 4758 * @brief request connection to device to 4759 * @result GAP_AUTHENTICATION_RESULT 4760 */ 4761 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4762 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4763 if (!connection){ 4764 hci_emit_security_level(con_handle, LEVEL_0); 4765 return; 4766 } 4767 gap_security_level_t current_level = gap_security_level(con_handle); 4768 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4769 requested_level, connection->requested_security_level, current_level); 4770 4771 // assumption: earlier requested security higher than current level => security request is active 4772 if (current_level < connection->requested_security_level){ 4773 if (connection->requested_security_level < requested_level){ 4774 // increase requested level as new level is higher 4775 4776 // TODO: handle re-authentication when done 4777 4778 connection->requested_security_level = requested_level; 4779 } 4780 return; 4781 } 4782 4783 // no request active, notify if security sufficient 4784 if (requested_level <= current_level){ 4785 hci_emit_security_level(con_handle, current_level); 4786 return; 4787 } 4788 4789 // start pairing to increase security level 4790 connection->requested_security_level = requested_level; 4791 4792 #if 0 4793 // sending encryption request without a link key results in an error. 4794 // TODO: figure out how to use it properly 4795 4796 // would enabling ecnryption suffice (>= LEVEL_2)? 4797 if (hci_stack->link_key_db){ 4798 link_key_type_t link_key_type; 4799 link_key_t link_key; 4800 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4801 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4802 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4803 return; 4804 } 4805 } 4806 } 4807 #endif 4808 4809 // start to authenticate connection if not already active 4810 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4811 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4812 hci_run(); 4813 } 4814 4815 /** 4816 * @brief start dedicated bonding with device. disconnect after bonding 4817 * @param device 4818 * @param request MITM protection 4819 * @result GAP_DEDICATED_BONDING_COMPLETE 4820 */ 4821 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4822 4823 // create connection state machine 4824 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4825 4826 if (!connection){ 4827 return BTSTACK_MEMORY_ALLOC_FAILED; 4828 } 4829 4830 // delete linkn key 4831 gap_drop_link_key_for_bd_addr(device); 4832 4833 // configure LEVEL_2/3, dedicated bonding 4834 connection->state = SEND_CREATE_CONNECTION; 4835 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4836 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4837 connection->bonding_flags = BONDING_DEDICATED; 4838 4839 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4840 4841 // handle: connnection failure (connection complete != ok) 4842 // handle: authentication failure 4843 // handle: disconnect on done 4844 4845 hci_run(); 4846 4847 return 0; 4848 } 4849 #endif 4850 4851 void gap_set_local_name(const char * local_name){ 4852 hci_stack->local_name = local_name; 4853 } 4854 4855 4856 #ifdef ENABLE_BLE 4857 4858 #ifdef ENABLE_LE_CENTRAL 4859 void gap_start_scan(void){ 4860 hci_stack->le_scanning_enabled = 1; 4861 hci_run(); 4862 } 4863 4864 void gap_stop_scan(void){ 4865 hci_stack->le_scanning_enabled = 0; 4866 hci_run(); 4867 } 4868 4869 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4870 hci_stack->le_scan_type = scan_type; 4871 hci_stack->le_scan_interval = scan_interval; 4872 hci_stack->le_scan_window = scan_window; 4873 hci_run(); 4874 } 4875 4876 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4877 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4878 if (!conn){ 4879 log_info("gap_connect: no connection exists yet, creating context"); 4880 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4881 if (!conn){ 4882 // notify client that alloc failed 4883 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4884 log_info("gap_connect: failed to alloc hci_connection_t"); 4885 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4886 } 4887 conn->state = SEND_CREATE_CONNECTION; 4888 log_info("gap_connect: send create connection next"); 4889 hci_run(); 4890 return ERROR_CODE_SUCCESS; 4891 } 4892 4893 if (!hci_is_le_connection(conn) || 4894 (conn->state == SEND_CREATE_CONNECTION) || 4895 (conn->state == SENT_CREATE_CONNECTION)) { 4896 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4897 log_error("gap_connect: classic connection or connect is already being created"); 4898 return GATT_CLIENT_IN_WRONG_STATE; 4899 } 4900 4901 // check if connection was just disconnected 4902 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4903 log_info("gap_connect: send create connection (again)"); 4904 conn->state = SEND_CREATE_CONNECTION; 4905 hci_run(); 4906 return ERROR_CODE_SUCCESS; 4907 } 4908 4909 log_info("gap_connect: context exists with state %u", conn->state); 4910 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4911 hci_run(); 4912 return ERROR_CODE_SUCCESS; 4913 } 4914 4915 // @assumption: only a single outgoing LE Connection exists 4916 static hci_connection_t * gap_get_outgoing_connection(void){ 4917 btstack_linked_item_t *it; 4918 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4919 hci_connection_t * conn = (hci_connection_t *) it; 4920 if (!hci_is_le_connection(conn)) continue; 4921 switch (conn->state){ 4922 case SEND_CREATE_CONNECTION: 4923 case SENT_CREATE_CONNECTION: 4924 case SENT_CANCEL_CONNECTION: 4925 return conn; 4926 default: 4927 break; 4928 }; 4929 } 4930 return NULL; 4931 } 4932 4933 uint8_t gap_connect_cancel(void){ 4934 hci_connection_t * conn = gap_get_outgoing_connection(); 4935 if (!conn) return 0; 4936 switch (conn->state){ 4937 case SEND_CREATE_CONNECTION: 4938 // skip sending create connection and emit event instead 4939 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4940 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4941 btstack_memory_hci_connection_free( conn ); 4942 break; 4943 case SENT_CREATE_CONNECTION: 4944 // request to send cancel connection 4945 conn->state = SEND_CANCEL_CONNECTION; 4946 hci_run(); 4947 break; 4948 default: 4949 break; 4950 } 4951 return 0; 4952 } 4953 #endif 4954 4955 #ifdef ENABLE_LE_CENTRAL 4956 /** 4957 * @brief Set connection parameters for outgoing connections 4958 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4959 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4960 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4961 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4962 * @param conn_latency, default: 4 4963 * @param supervision_timeout (unit: 10ms), default: 720 ms 4964 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4965 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4966 */ 4967 4968 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4969 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4970 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4971 hci_stack->le_connection_scan_interval = conn_scan_interval; 4972 hci_stack->le_connection_scan_window = conn_scan_window; 4973 hci_stack->le_connection_interval_min = conn_interval_min; 4974 hci_stack->le_connection_interval_max = conn_interval_max; 4975 hci_stack->le_connection_latency = conn_latency; 4976 hci_stack->le_supervision_timeout = supervision_timeout; 4977 hci_stack->le_minimum_ce_length = min_ce_length; 4978 hci_stack->le_maximum_ce_length = max_ce_length; 4979 } 4980 #endif 4981 4982 /** 4983 * @brief Updates the connection parameters for a given LE connection 4984 * @param handle 4985 * @param conn_interval_min (unit: 1.25ms) 4986 * @param conn_interval_max (unit: 1.25ms) 4987 * @param conn_latency 4988 * @param supervision_timeout (unit: 10ms) 4989 * @returns 0 if ok 4990 */ 4991 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4992 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4993 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4994 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4995 connection->le_conn_interval_min = conn_interval_min; 4996 connection->le_conn_interval_max = conn_interval_max; 4997 connection->le_conn_latency = conn_latency; 4998 connection->le_supervision_timeout = supervision_timeout; 4999 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5000 hci_run(); 5001 return 0; 5002 } 5003 5004 /** 5005 * @brief Request an update of the connection parameter for a given LE connection 5006 * @param handle 5007 * @param conn_interval_min (unit: 1.25ms) 5008 * @param conn_interval_max (unit: 1.25ms) 5009 * @param conn_latency 5010 * @param supervision_timeout (unit: 10ms) 5011 * @returns 0 if ok 5012 */ 5013 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5014 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5015 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5016 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5017 connection->le_conn_interval_min = conn_interval_min; 5018 connection->le_conn_interval_max = conn_interval_max; 5019 connection->le_conn_latency = conn_latency; 5020 connection->le_supervision_timeout = supervision_timeout; 5021 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5022 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5023 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5024 return 0; 5025 } 5026 5027 #ifdef ENABLE_LE_PERIPHERAL 5028 5029 static void gap_advertisments_changed(void){ 5030 // disable advertisements before updating adv, scan data, or adv params 5031 if (hci_stack->le_advertisements_active){ 5032 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5033 } 5034 hci_run(); 5035 } 5036 5037 /** 5038 * @brief Set Advertisement Data 5039 * @param advertising_data_length 5040 * @param advertising_data (max 31 octets) 5041 * @note data is not copied, pointer has to stay valid 5042 */ 5043 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5044 hci_stack->le_advertisements_data_len = advertising_data_length; 5045 hci_stack->le_advertisements_data = advertising_data; 5046 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5047 gap_advertisments_changed(); 5048 } 5049 5050 /** 5051 * @brief Set Scan Response Data 5052 * @param advertising_data_length 5053 * @param advertising_data (max 31 octets) 5054 * @note data is not copied, pointer has to stay valid 5055 */ 5056 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5057 hci_stack->le_scan_response_data_len = scan_response_data_length; 5058 hci_stack->le_scan_response_data = scan_response_data; 5059 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5060 gap_advertisments_changed(); 5061 } 5062 5063 /** 5064 * @brief Set Advertisement Parameters 5065 * @param adv_int_min 5066 * @param adv_int_max 5067 * @param adv_type 5068 * @param direct_address_type 5069 * @param direct_address 5070 * @param channel_map 5071 * @param filter_policy 5072 * 5073 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5074 */ 5075 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5076 uint8_t direct_address_typ, bd_addr_t direct_address, 5077 uint8_t channel_map, uint8_t filter_policy) { 5078 5079 hci_stack->le_advertisements_interval_min = adv_int_min; 5080 hci_stack->le_advertisements_interval_max = adv_int_max; 5081 hci_stack->le_advertisements_type = adv_type; 5082 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5083 hci_stack->le_advertisements_channel_map = channel_map; 5084 hci_stack->le_advertisements_filter_policy = filter_policy; 5085 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5086 6); 5087 5088 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5089 gap_advertisments_changed(); 5090 } 5091 5092 /** 5093 * @brief Enable/Disable Advertisements 5094 * @param enabled 5095 */ 5096 void gap_advertisements_enable(int enabled){ 5097 hci_stack->le_advertisements_enabled = enabled; 5098 if (enabled && !hci_stack->le_advertisements_active){ 5099 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5100 } 5101 if (!enabled && hci_stack->le_advertisements_active){ 5102 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5103 } 5104 hci_run(); 5105 } 5106 5107 #endif 5108 5109 void hci_le_set_own_address_type(uint8_t own_address_type){ 5110 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5111 if (own_address_type == hci_stack->le_own_addr_type) return; 5112 hci_stack->le_own_addr_type = own_address_type; 5113 5114 #ifdef ENABLE_LE_PERIPHERAL 5115 // update advertisement parameters, too 5116 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5117 gap_advertisments_changed(); 5118 #endif 5119 #ifdef ENABLE_LE_CENTRAL 5120 // note: we don't update scan parameters or modify ongoing connection attempts 5121 #endif 5122 } 5123 5124 #endif 5125 5126 uint8_t gap_disconnect(hci_con_handle_t handle){ 5127 hci_connection_t * conn = hci_connection_for_handle(handle); 5128 if (!conn){ 5129 hci_emit_disconnection_complete(handle, 0); 5130 return 0; 5131 } 5132 // ignore if already disconnected 5133 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5134 return 0; 5135 } 5136 conn->state = SEND_DISCONNECT; 5137 hci_run(); 5138 return 0; 5139 } 5140 5141 int gap_read_rssi(hci_con_handle_t con_handle){ 5142 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5143 if (hci_connection == NULL) return 0; 5144 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5145 hci_run(); 5146 return 1; 5147 } 5148 5149 /** 5150 * @brief Get connection type 5151 * @param con_handle 5152 * @result connection_type 5153 */ 5154 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5155 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5156 if (!conn) return GAP_CONNECTION_INVALID; 5157 switch (conn->address_type){ 5158 case BD_ADDR_TYPE_LE_PUBLIC: 5159 case BD_ADDR_TYPE_LE_RANDOM: 5160 return GAP_CONNECTION_LE; 5161 case BD_ADDR_TYPE_SCO: 5162 return GAP_CONNECTION_SCO; 5163 case BD_ADDR_TYPE_ACL: 5164 return GAP_CONNECTION_ACL; 5165 default: 5166 return GAP_CONNECTION_INVALID; 5167 } 5168 } 5169 5170 #ifdef ENABLE_BLE 5171 5172 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){ 5173 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5174 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5175 5176 conn->le_phy_update_all_phys = all_phys; 5177 conn->le_phy_update_tx_phys = tx_phys; 5178 conn->le_phy_update_rx_phys = rx_phys; 5179 conn->le_phy_update_phy_options = phy_options; 5180 5181 hci_run(); 5182 5183 return 0; 5184 } 5185 5186 #ifdef ENABLE_LE_CENTRAL 5187 /** 5188 * @brief Auto Connection Establishment - Start Connecting to device 5189 * @param address_typ 5190 * @param address 5191 * @returns 0 if ok 5192 */ 5193 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5194 // check capacity 5195 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5196 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5197 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5198 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5199 entry->address_type = address_type; 5200 (void)memcpy(entry->address, address, 6); 5201 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5202 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5203 hci_run(); 5204 return 0; 5205 } 5206 5207 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5208 btstack_linked_list_iterator_t it; 5209 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5210 while (btstack_linked_list_iterator_has_next(&it)){ 5211 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5212 if (entry->address_type != address_type) continue; 5213 if (memcmp(entry->address, address, 6) != 0) continue; 5214 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5215 // remove from controller if already present 5216 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5217 continue; 5218 } 5219 // direclty remove entry from whitelist 5220 btstack_linked_list_iterator_remove(&it); 5221 btstack_memory_whitelist_entry_free(entry); 5222 } 5223 } 5224 5225 /** 5226 * @brief Auto Connection Establishment - Stop Connecting to device 5227 * @param address_typ 5228 * @param address 5229 * @returns 0 if ok 5230 */ 5231 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5232 hci_remove_from_whitelist(address_type, address); 5233 hci_run(); 5234 return 0; 5235 } 5236 5237 /** 5238 * @brief Auto Connection Establishment - Stop everything 5239 * @note Convenience function to stop all active auto connection attempts 5240 */ 5241 void gap_auto_connection_stop_all(void){ 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->state & LE_WHITELIST_ON_CONTROLLER){ 5247 // remove from controller if already present 5248 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5249 continue; 5250 } 5251 // directly remove entry from whitelist 5252 btstack_linked_list_iterator_remove(&it); 5253 btstack_memory_whitelist_entry_free(entry); 5254 } 5255 hci_run(); 5256 } 5257 5258 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5259 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5260 if (!conn) return 0; 5261 return conn->le_connection_interval; 5262 } 5263 #endif 5264 #endif 5265 5266 #ifdef ENABLE_CLASSIC 5267 /** 5268 * @brief Set Extended Inquiry Response data 5269 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5270 * @note has to be done before stack starts up 5271 */ 5272 void gap_set_extended_inquiry_response(const uint8_t * data){ 5273 hci_stack->eir_data = data; 5274 } 5275 5276 /** 5277 * @brief Start GAP Classic Inquiry 5278 * @param duration in 1.28s units 5279 * @return 0 if ok 5280 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5281 */ 5282 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5283 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5284 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5285 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5286 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5287 } 5288 hci_stack->inquiry_state = duration_in_1280ms_units; 5289 hci_run(); 5290 return 0; 5291 } 5292 5293 /** 5294 * @brief Stop GAP Classic Inquiry 5295 * @returns 0 if ok 5296 */ 5297 int gap_inquiry_stop(void){ 5298 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5299 // emit inquiry complete event, before it even started 5300 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5301 hci_emit_event(event, sizeof(event), 1); 5302 return 0; 5303 } 5304 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5305 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5306 hci_run(); 5307 return 0; 5308 } 5309 5310 5311 /** 5312 * @brief Remote Name Request 5313 * @param addr 5314 * @param page_scan_repetition_mode 5315 * @param clock_offset only used when bit 15 is set 5316 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5317 */ 5318 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5319 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5320 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5321 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5322 hci_stack->remote_name_clock_offset = clock_offset; 5323 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5324 hci_run(); 5325 return 0; 5326 } 5327 5328 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5329 hci_stack->gap_pairing_state = state; 5330 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5331 hci_run(); 5332 return 0; 5333 } 5334 5335 /** 5336 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5337 * @param addr 5338 * @param pin_data 5339 * @param pin_len 5340 * @return 0 if ok 5341 */ 5342 int gap_pin_code_response_binary(bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5343 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5344 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5345 hci_stack->gap_pairing_pin_len = pin_len; 5346 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5347 } 5348 5349 /** 5350 * @brief Legacy Pairing Pin Code Response 5351 * @param addr 5352 * @param pin 5353 * @return 0 if ok 5354 */ 5355 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5356 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5357 } 5358 5359 /** 5360 * @brief Abort Legacy Pairing 5361 * @param addr 5362 * @param pin 5363 * @return 0 if ok 5364 */ 5365 int gap_pin_code_negative(bd_addr_t addr){ 5366 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5367 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5368 } 5369 5370 /** 5371 * @brief SSP Passkey Response 5372 * @param addr 5373 * @param passkey 5374 * @return 0 if ok 5375 */ 5376 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5377 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5378 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5379 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5380 } 5381 5382 /** 5383 * @brief Abort SSP Passkey Entry/Pairing 5384 * @param addr 5385 * @param pin 5386 * @return 0 if ok 5387 */ 5388 int gap_ssp_passkey_negative(bd_addr_t addr){ 5389 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5390 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5391 } 5392 5393 /** 5394 * @brief Accept SSP Numeric Comparison 5395 * @param addr 5396 * @param passkey 5397 * @return 0 if ok 5398 */ 5399 int gap_ssp_confirmation_response(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_CONFIRMATION); 5402 } 5403 5404 /** 5405 * @brief Abort SSP Numeric Comparison/Pairing 5406 * @param addr 5407 * @param pin 5408 * @return 0 if ok 5409 */ 5410 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5411 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5412 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5413 } 5414 5415 /** 5416 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5417 * @param inquiry_mode see bluetooth_defines.h 5418 */ 5419 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5420 hci_stack->inquiry_mode = mode; 5421 } 5422 5423 /** 5424 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5425 */ 5426 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5427 hci_stack->sco_voice_setting = voice_setting; 5428 } 5429 5430 /** 5431 * @brief Get SCO Voice Setting 5432 * @return current voice setting 5433 */ 5434 uint16_t hci_get_sco_voice_setting(void){ 5435 return hci_stack->sco_voice_setting; 5436 } 5437 5438 static int hci_have_usb_transport(void){ 5439 if (!hci_stack->hci_transport) return 0; 5440 const char * transport_name = hci_stack->hci_transport->name; 5441 if (!transport_name) return 0; 5442 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5443 } 5444 5445 /** @brief Get SCO packet length for current SCO Voice setting 5446 * @note Using SCO packets of the exact length is required for USB transfer 5447 * @return Length of SCO packets in bytes (not audio frames) 5448 */ 5449 int hci_get_sco_packet_length(void){ 5450 int sco_packet_length = 0; 5451 5452 #ifdef ENABLE_SCO_OVER_HCI 5453 5454 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5455 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5456 5457 if (hci_have_usb_transport()){ 5458 // see Core Spec for H2 USB Transfer. 5459 // 3 byte SCO header + 24 bytes per connection 5460 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5461 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5462 } else { 5463 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5464 sco_packet_length = 3 + 60 * multiplier; 5465 // assert that it still fits inside an SCO buffer 5466 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5467 sco_packet_length = 3 + 60; 5468 } 5469 } 5470 #endif 5471 return sco_packet_length; 5472 } 5473 5474 /** 5475 * @brief Sets the master/slave policy 5476 * @param policy (0: attempt to become master, 1: let connecting device decide) 5477 */ 5478 void hci_set_master_slave_policy(uint8_t policy){ 5479 hci_stack->master_slave_policy = policy; 5480 } 5481 5482 #endif 5483 5484 HCI_STATE hci_get_state(void){ 5485 return hci_stack->state; 5486 } 5487 5488 #ifdef ENABLE_CLASSIC 5489 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5490 hci_stack->gap_classic_accept_callback = accept_callback; 5491 } 5492 #endif 5493 5494 /** 5495 * @brief Set callback for Bluetooth Hardware Error 5496 */ 5497 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5498 hci_stack->hardware_error_callback = fn; 5499 } 5500 5501 void hci_disconnect_all(void){ 5502 btstack_linked_list_iterator_t it; 5503 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5504 while (btstack_linked_list_iterator_has_next(&it)){ 5505 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5506 if (con->state == SENT_DISCONNECT) continue; 5507 con->state = SEND_DISCONNECT; 5508 } 5509 hci_run(); 5510 } 5511 5512 uint16_t hci_get_manufacturer(void){ 5513 return hci_stack->manufacturer; 5514 } 5515 5516 #ifdef ENABLE_BLE 5517 5518 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5519 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5520 if (!hci_con) return NULL; 5521 return &hci_con->sm_connection; 5522 } 5523 5524 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5525 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5526 5527 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5528 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5529 if (hci_connection == NULL) return 0; 5530 if (hci_is_le_connection(hci_connection)){ 5531 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5532 if (sm_conn->sm_connection_encrypted) { 5533 return sm_conn->sm_actual_encryption_key_size; 5534 } 5535 } 5536 #ifdef ENABLE_CLASSIC 5537 else { 5538 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5539 return hci_connection->encryption_key_size; 5540 } 5541 } 5542 #endif 5543 return 0; 5544 } 5545 5546 int gap_authenticated(hci_con_handle_t con_handle){ 5547 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5548 if (hci_connection == NULL) return 0; 5549 5550 switch (hci_connection->address_type){ 5551 case BD_ADDR_TYPE_LE_PUBLIC: 5552 case BD_ADDR_TYPE_LE_RANDOM: 5553 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5554 return hci_connection->sm_connection.sm_connection_authenticated; 5555 #ifdef ENABLE_CLASSIC 5556 case BD_ADDR_TYPE_SCO: 5557 case BD_ADDR_TYPE_ACL: 5558 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5559 #endif 5560 default: 5561 return 0; 5562 } 5563 } 5564 5565 int gap_secure_connection(hci_con_handle_t con_handle){ 5566 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5567 if (hci_connection == NULL) return 0; 5568 5569 switch (hci_connection->address_type){ 5570 case BD_ADDR_TYPE_LE_PUBLIC: 5571 case BD_ADDR_TYPE_LE_RANDOM: 5572 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5573 return hci_connection->sm_connection.sm_connection_sc; 5574 #ifdef ENABLE_CLASSIC 5575 case BD_ADDR_TYPE_SCO: 5576 case BD_ADDR_TYPE_ACL: 5577 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5578 #endif 5579 default: 5580 return 0; 5581 } 5582 } 5583 5584 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5585 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5586 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5587 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5588 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5589 return sm_conn->sm_connection_authorization_state; 5590 } 5591 #endif 5592 5593 #ifdef ENABLE_CLASSIC 5594 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){ 5595 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5596 if (!conn) return GAP_CONNECTION_INVALID; 5597 conn->sniff_min_interval = sniff_min_interval; 5598 conn->sniff_max_interval = sniff_max_interval; 5599 conn->sniff_attempt = sniff_attempt; 5600 conn->sniff_timeout = sniff_timeout; 5601 hci_run(); 5602 return 0; 5603 } 5604 5605 /** 5606 * @brief Exit Sniff mode 5607 * @param con_handle 5608 @ @return 0 if ok 5609 */ 5610 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5611 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5612 if (!conn) return GAP_CONNECTION_INVALID; 5613 conn->sniff_min_interval = 0xffff; 5614 hci_run(); 5615 return 0; 5616 } 5617 #endif 5618 5619 void hci_halting_defer(void){ 5620 if (hci_stack->state != HCI_STATE_HALTING) return; 5621 switch (hci_stack->substate){ 5622 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5623 case HCI_HALTING_CLOSE: 5624 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5625 break; 5626 default: 5627 break; 5628 } 5629 } 5630 5631 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5632 void hci_setup_test_connections_fuzz(void){ 5633 hci_connection_t * conn; 5634 5635 // default address: 66:55:44:33:00:01 5636 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5637 5638 // setup Controller info 5639 hci_stack->num_cmd_packets = 255; 5640 hci_stack->acl_packets_total_num = 255; 5641 5642 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5643 addr[5] = 0x01; 5644 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5645 conn->con_handle = addr[5]; 5646 conn->role = HCI_ROLE_SLAVE; 5647 conn->state = RECEIVED_CONNECTION_REQUEST; 5648 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5649 5650 // setup incoming Classic SCO connection with con handle 0x0002 5651 addr[5] = 0x02; 5652 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5653 conn->con_handle = addr[5]; 5654 conn->role = HCI_ROLE_SLAVE; 5655 conn->state = RECEIVED_CONNECTION_REQUEST; 5656 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5657 5658 // setup ready Classic ACL connection with con handle 0x0003 5659 addr[5] = 0x03; 5660 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5661 conn->con_handle = addr[5]; 5662 conn->role = HCI_ROLE_SLAVE; 5663 conn->state = OPEN; 5664 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5665 5666 // setup ready Classic SCO connection with con handle 0x0004 5667 addr[5] = 0x04; 5668 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5669 conn->con_handle = addr[5]; 5670 conn->role = HCI_ROLE_SLAVE; 5671 conn->state = OPEN; 5672 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5673 5674 // setup ready LE ACL connection with con handle 0x005 and public address 5675 addr[5] = 0x05; 5676 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5677 conn->con_handle = addr[5]; 5678 conn->role = HCI_ROLE_SLAVE; 5679 conn->state = OPEN; 5680 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5681 } 5682 5683 void hci_free_connections_fuzz(void){ 5684 btstack_linked_list_iterator_t it; 5685 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5686 while (btstack_linked_list_iterator_has_next(&it)){ 5687 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5688 btstack_linked_list_iterator_remove(&it); 5689 btstack_memory_hci_connection_free(con); 5690 } 5691 } 5692 void hci_simulate_working_fuzz(void){ 5693 hci_init_done(); 5694 hci_stack->num_cmd_packets = 255; 5695 } 5696 #endif 5697