1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #endif 63 64 #include <stdarg.h> 65 #include <string.h> 66 #include <inttypes.h> 67 68 #include "btstack_debug.h" 69 #include "btstack_event.h" 70 #include "btstack_linked_list.h" 71 #include "btstack_memory.h" 72 #include "bluetooth_company_id.h" 73 #include "bluetooth_data_types.h" 74 #include "gap.h" 75 #include "hci.h" 76 #include "hci_cmd.h" 77 #include "hci_dump.h" 78 #include "ad_parser.h" 79 80 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 81 #ifndef HCI_HOST_ACL_PACKET_NUM 82 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 83 #endif 84 #ifndef HCI_HOST_ACL_PACKET_LEN 85 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 86 #endif 87 #ifndef HCI_HOST_SCO_PACKET_NUM 88 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 89 #endif 90 #ifndef HCI_HOST_SCO_PACKET_LEN 91 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 92 #endif 93 #endif 94 95 #define HCI_CONNECTION_TIMEOUT_MS 10000 96 97 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 98 #define HCI_RESET_RESEND_TIMEOUT_MS 200 99 #endif 100 101 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 102 #ifndef GAP_INQUIRY_MAX_NAME_LEN 103 #define GAP_INQUIRY_MAX_NAME_LEN 32 104 #endif 105 106 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 107 #define GAP_INQUIRY_DURATION_MIN 0x01 108 #define GAP_INQUIRY_DURATION_MAX 0x30 109 #define GAP_INQUIRY_STATE_ACTIVE 0x80 110 #define GAP_INQUIRY_STATE_IDLE 0 111 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 112 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 113 114 // GAP Remote Name Request 115 #define GAP_REMOTE_NAME_STATE_IDLE 0 116 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 117 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 118 119 // GAP Pairing 120 #define GAP_PAIRING_STATE_IDLE 0 121 #define GAP_PAIRING_STATE_SEND_PIN 1 122 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 123 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 124 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 125 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 127 128 129 // prototypes 130 #ifdef ENABLE_CLASSIC 131 static void hci_update_scan_enable(void); 132 static void hci_emit_discoverable_enabled(uint8_t enabled); 133 static int hci_local_ssp_activated(void); 134 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 135 static bool hci_ssp_supported(hci_connection_t * connection); 136 static void hci_notify_if_sco_can_send_now(void); 137 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 138 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 139 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 140 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 141 static void hci_connection_timestamp(hci_connection_t *connection); 142 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 143 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 144 #endif 145 146 static int hci_power_control_on(void); 147 static void hci_power_control_off(void); 148 static void hci_state_reset(void); 149 static void hci_emit_transport_packet_sent(void); 150 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 151 static void hci_emit_nr_connections_changed(void); 152 static void hci_emit_hci_open_failed(void); 153 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 154 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 155 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 156 static void hci_run(void); 157 static int hci_is_le_connection(hci_connection_t * connection); 158 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 159 160 #ifdef ENABLE_CLASSIC 161 static int hci_have_usb_transport(void); 162 #endif 163 164 #ifdef ENABLE_BLE 165 #ifdef ENABLE_LE_CENTRAL 166 // called from test/ble_client/advertising_data_parser.c 167 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 168 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address); 169 static hci_connection_t * gap_get_outgoing_connection(void); 170 #endif 171 #endif 172 173 // the STACK is here 174 #ifndef HAVE_MALLOC 175 static hci_stack_t hci_stack_static; 176 #endif 177 static hci_stack_t * hci_stack = NULL; 178 179 #ifdef ENABLE_CLASSIC 180 // default name 181 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 182 183 // test helper 184 static uint8_t disable_l2cap_timeouts = 0; 185 #endif 186 187 /** 188 * create connection for given address 189 * 190 * @return connection OR NULL, if no memory left 191 */ 192 static hci_connection_t * create_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 193 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 194 hci_connection_t * conn = btstack_memory_hci_connection_get(); 195 if (!conn) return NULL; 196 bd_addr_copy(conn->address, addr); 197 conn->role = HCI_ROLE_INVALID; 198 conn->address_type = addr_type; 199 conn->con_handle = 0xffff; 200 conn->authentication_flags = AUTH_FLAGS_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 205 btstack_run_loop_set_timer_context(&conn->timeout, conn); 206 hci_connection_timestamp(conn); 207 #endif 208 conn->acl_recombination_length = 0; 209 conn->acl_recombination_pos = 0; 210 conn->num_packets_sent = 0; 211 212 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 213 #ifdef ENABLE_BLE 214 conn->le_phy_update_all_phys = 0xff; 215 #endif 216 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 217 conn->le_max_tx_octets = 27; 218 #endif 219 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 220 return conn; 221 } 222 223 224 /** 225 * get le connection parameter range 226 * 227 * @return le connection parameter range struct 228 */ 229 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 230 *range = hci_stack->le_connection_parameter_range; 231 } 232 233 /** 234 * set le connection parameter range 235 * 236 */ 237 238 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 239 hci_stack->le_connection_parameter_range = *range; 240 } 241 242 /** 243 * @brief Test if connection parameters are inside in existing rage 244 * @param conn_interval_min (unit: 1.25ms) 245 * @param conn_interval_max (unit: 1.25ms) 246 * @param conn_latency 247 * @param supervision_timeout (unit: 10ms) 248 * @returns 1 if included 249 */ 250 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){ 251 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 252 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 253 254 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 255 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 256 257 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 258 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 259 260 return 1; 261 } 262 263 /** 264 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 265 * @note: default: 1 266 * @param max_peripheral_connections 267 */ 268 #ifdef ENABLE_LE_PERIPHERAL 269 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 270 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 271 } 272 #endif 273 274 /** 275 * get hci connections iterator 276 * 277 * @return hci connections iterator 278 */ 279 280 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 281 btstack_linked_list_iterator_init(it, &hci_stack->connections); 282 } 283 284 /** 285 * get connection for a given handle 286 * 287 * @return connection OR NULL, if not found 288 */ 289 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 290 btstack_linked_list_iterator_t it; 291 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 292 while (btstack_linked_list_iterator_has_next(&it)){ 293 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 294 if ( item->con_handle == con_handle ) { 295 return item; 296 } 297 } 298 return NULL; 299 } 300 301 /** 302 * get connection for given address 303 * 304 * @return connection OR NULL, if not found 305 */ 306 hci_connection_t * hci_connection_for_bd_addr_and_type(bd_addr_t addr, bd_addr_type_t addr_type){ 307 btstack_linked_list_iterator_t it; 308 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 309 while (btstack_linked_list_iterator_has_next(&it)){ 310 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 311 if (connection->address_type != addr_type) continue; 312 if (memcmp(addr, connection->address, 6) != 0) continue; 313 return connection; 314 } 315 return NULL; 316 } 317 318 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 319 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 320 } 321 322 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 323 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 324 } 325 326 #ifdef ENABLE_CLASSIC 327 328 #ifdef ENABLE_SCO_OVER_HCI 329 static int hci_number_sco_connections(void){ 330 int connections = 0; 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 336 connections++; 337 } 338 return connections; 339 } 340 #endif 341 342 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 343 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 344 #ifdef HAVE_EMBEDDED_TICK 345 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 346 // connections might be timed out 347 hci_emit_l2cap_check_timeout(connection); 348 } 349 #else 350 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 351 // connections might be timed out 352 hci_emit_l2cap_check_timeout(connection); 353 } 354 #endif 355 } 356 357 static void hci_connection_timestamp(hci_connection_t *connection){ 358 #ifdef HAVE_EMBEDDED_TICK 359 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 360 #else 361 connection->timestamp = btstack_run_loop_get_time_ms(); 362 #endif 363 } 364 365 /** 366 * add authentication flags and reset timer 367 * @note: assumes classic connection 368 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 369 */ 370 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 371 bd_addr_t addr; 372 reverse_bd_addr(bd_addr, addr); 373 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 374 if (conn) { 375 connectionSetAuthenticationFlags(conn, flags); 376 hci_connection_timestamp(conn); 377 } 378 } 379 380 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 381 hci_connection_t * conn = hci_connection_for_handle(handle); 382 if (!conn) return 0; 383 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 384 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 385 return 0; 386 } 387 388 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 389 if (!hci_stack->link_key_db) return; 390 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 391 hci_stack->link_key_db->delete_link_key(addr); 392 } 393 394 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 395 if (!hci_stack->link_key_db) return; 396 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 397 hci_stack->link_key_db->put_link_key(addr, link_key, type); 398 } 399 400 void gap_delete_all_link_keys(void){ 401 bd_addr_t addr; 402 link_key_t link_key; 403 link_key_type_t type; 404 btstack_link_key_iterator_t it; 405 int ok = gap_link_key_iterator_init(&it); 406 if (!ok) { 407 log_error("could not initialize iterator"); 408 return; 409 } 410 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 411 gap_drop_link_key_for_bd_addr(addr); 412 } 413 gap_link_key_iterator_done(&it); 414 } 415 416 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 417 if (!hci_stack->link_key_db) return 0; 418 if (!hci_stack->link_key_db->iterator_init) return 0; 419 return hci_stack->link_key_db->iterator_init(it); 420 } 421 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){ 422 if (!hci_stack->link_key_db) return 0; 423 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 424 } 425 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return; 427 hci_stack->link_key_db->iterator_done(it); 428 } 429 #endif 430 431 static int hci_is_le_connection(hci_connection_t * connection){ 432 switch (connection->address_type){ 433 case BD_ADDR_TYPE_LE_PUBLIC: 434 case BD_ADDR_TYPE_LE_RANDOM: 435 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 436 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 437 return 1; 438 default: 439 return 0; 440 } 441 } 442 443 /** 444 * count connections 445 */ 446 static int nr_hci_connections(void){ 447 int count = 0; 448 btstack_linked_item_t *it; 449 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 450 count++; 451 } 452 return count; 453 } 454 455 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 456 457 unsigned int num_packets_sent_classic = 0; 458 unsigned int num_packets_sent_le = 0; 459 460 btstack_linked_item_t *it; 461 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 462 hci_connection_t * connection = (hci_connection_t *) it; 463 if (hci_is_le_connection(connection)){ 464 num_packets_sent_le += connection->num_packets_sent; 465 } 466 if (connection->address_type == BD_ADDR_TYPE_ACL){ 467 num_packets_sent_classic += connection->num_packets_sent; 468 } 469 } 470 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 471 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 472 int free_slots_le = 0; 473 474 if (free_slots_classic < 0){ 475 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); 476 return 0; 477 } 478 479 if (hci_stack->le_acl_packets_total_num){ 480 // if we have LE slots, they are used 481 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 482 if (free_slots_le < 0){ 483 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); 484 return 0; 485 } 486 } else { 487 // otherwise, classic slots are used for LE, too 488 free_slots_classic -= num_packets_sent_le; 489 if (free_slots_classic < 0){ 490 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); 491 return 0; 492 } 493 } 494 495 switch (address_type){ 496 case BD_ADDR_TYPE_UNKNOWN: 497 log_error("hci_number_free_acl_slots: unknown address type"); 498 return 0; 499 500 case BD_ADDR_TYPE_ACL: 501 return free_slots_classic; 502 503 default: 504 if (hci_stack->le_acl_packets_total_num){ 505 return free_slots_le; 506 } 507 return free_slots_classic; 508 } 509 } 510 511 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 512 // get connection type 513 hci_connection_t * connection = hci_connection_for_handle(con_handle); 514 if (!connection){ 515 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 516 return 0; 517 } 518 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 519 } 520 521 #ifdef ENABLE_CLASSIC 522 static int hci_number_free_sco_slots(void){ 523 unsigned int num_sco_packets_sent = 0; 524 btstack_linked_item_t *it; 525 if (hci_stack->synchronous_flow_control_enabled){ 526 // explicit flow control 527 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 528 hci_connection_t * connection = (hci_connection_t *) it; 529 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 530 num_sco_packets_sent += connection->num_packets_sent; 531 } 532 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 533 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 534 return 0; 535 } 536 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 537 } else { 538 // implicit flow control -- TODO 539 int num_ready = 0; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 if (connection->sco_tx_ready == 0) continue; 544 num_ready++; 545 } 546 return num_ready; 547 } 548 } 549 #endif 550 551 // only used to send HCI Host Number Completed Packets 552 static int hci_can_send_comand_packet_transport(void){ 553 if (hci_stack->hci_packet_buffer_reserved) return 0; 554 555 // check for async hci transport implementations 556 if (hci_stack->hci_transport->can_send_packet_now){ 557 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 558 return 0; 559 } 560 } 561 return 1; 562 } 563 564 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 565 int hci_can_send_command_packet_now(void){ 566 if (hci_can_send_comand_packet_transport() == 0) return 0; 567 return hci_stack->num_cmd_packets > 0u; 568 } 569 570 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 571 // check for async hci transport implementations 572 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 573 return hci_stack->hci_transport->can_send_packet_now(packet_type); 574 } 575 576 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 577 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 578 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 579 } 580 581 int hci_can_send_acl_le_packet_now(void){ 582 if (hci_stack->hci_packet_buffer_reserved) return 0; 583 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 584 } 585 586 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 587 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 588 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 589 } 590 591 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 592 if (hci_stack->hci_packet_buffer_reserved) return 0; 593 return hci_can_send_prepared_acl_packet_now(con_handle); 594 } 595 596 #ifdef ENABLE_CLASSIC 597 int hci_can_send_acl_classic_packet_now(void){ 598 if (hci_stack->hci_packet_buffer_reserved) return 0; 599 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 600 } 601 602 int hci_can_send_prepared_sco_packet_now(void){ 603 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 604 if (hci_have_usb_transport()){ 605 return hci_stack->sco_can_send_now; 606 } else { 607 return hci_number_free_sco_slots() > 0; 608 } 609 } 610 611 int hci_can_send_sco_packet_now(void){ 612 if (hci_stack->hci_packet_buffer_reserved) return 0; 613 return hci_can_send_prepared_sco_packet_now(); 614 } 615 616 void hci_request_sco_can_send_now_event(void){ 617 hci_stack->sco_waiting_for_can_send_now = 1; 618 hci_notify_if_sco_can_send_now(); 619 } 620 #endif 621 622 // used for internal checks in l2cap.c 623 int hci_is_packet_buffer_reserved(void){ 624 return hci_stack->hci_packet_buffer_reserved; 625 } 626 627 // reserves outgoing packet buffer. @returns 1 if successful 628 int hci_reserve_packet_buffer(void){ 629 if (hci_stack->hci_packet_buffer_reserved) { 630 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 631 return 0; 632 } 633 hci_stack->hci_packet_buffer_reserved = 1; 634 return 1; 635 } 636 637 void hci_release_packet_buffer(void){ 638 hci_stack->hci_packet_buffer_reserved = 0; 639 } 640 641 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 642 static int hci_transport_synchronous(void){ 643 return hci_stack->hci_transport->can_send_packet_now == NULL; 644 } 645 646 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 647 648 // 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); 649 650 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 651 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 652 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 653 max_acl_data_packet_length = hci_stack->le_data_packets_length; 654 } 655 656 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 657 if (hci_is_le_connection(connection)){ 658 max_acl_data_packet_length = connection->le_max_tx_octets; 659 } 660 #endif 661 662 log_debug("hci_send_acl_packet_fragments entered"); 663 664 int err; 665 // multiple packets could be send on a synchronous HCI transport 666 while (true){ 667 668 log_debug("hci_send_acl_packet_fragments loop entered"); 669 670 // get current data 671 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 672 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 673 int more_fragments = 0; 674 675 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 676 if (current_acl_data_packet_length > max_acl_data_packet_length){ 677 more_fragments = 1; 678 current_acl_data_packet_length = max_acl_data_packet_length; 679 } 680 681 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 682 if (acl_header_pos > 0u){ 683 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 684 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 685 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 686 } 687 688 // update header len 689 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 690 691 // count packet 692 connection->num_packets_sent++; 693 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", more_fragments); 694 695 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 696 if (more_fragments){ 697 // update start of next fragment to send 698 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 699 } else { 700 // done 701 hci_stack->acl_fragmentation_pos = 0; 702 hci_stack->acl_fragmentation_total_size = 0; 703 } 704 705 // send packet 706 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 707 const int size = current_acl_data_packet_length + 4; 708 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 709 hci_stack->acl_fragmentation_tx_active = 1; 710 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 711 712 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", more_fragments); 713 714 // done yet? 715 if (!more_fragments) break; 716 717 // can send more? 718 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 719 } 720 721 log_debug("hci_send_acl_packet_fragments loop over"); 722 723 // release buffer now for synchronous transport 724 if (hci_transport_synchronous()){ 725 hci_stack->acl_fragmentation_tx_active = 0; 726 hci_release_packet_buffer(); 727 hci_emit_transport_packet_sent(); 728 } 729 730 return err; 731 } 732 733 // pre: caller has reserved the packet buffer 734 int hci_send_acl_packet_buffer(int size){ 735 736 // log_info("hci_send_acl_packet_buffer size %u", size); 737 738 if (!hci_stack->hci_packet_buffer_reserved) { 739 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 740 return 0; 741 } 742 743 uint8_t * packet = hci_stack->hci_packet_buffer; 744 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 745 746 // check for free places on Bluetooth module 747 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 748 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 749 hci_release_packet_buffer(); 750 hci_emit_transport_packet_sent(); 751 return BTSTACK_ACL_BUFFERS_FULL; 752 } 753 754 hci_connection_t *connection = hci_connection_for_handle( con_handle); 755 if (!connection) { 756 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 757 hci_release_packet_buffer(); 758 hci_emit_transport_packet_sent(); 759 return 0; 760 } 761 762 #ifdef ENABLE_CLASSIC 763 hci_connection_timestamp(connection); 764 #endif 765 766 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 767 768 // setup data 769 hci_stack->acl_fragmentation_total_size = size; 770 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 771 772 return hci_send_acl_packet_fragments(connection); 773 } 774 775 #ifdef ENABLE_CLASSIC 776 // pre: caller has reserved the packet buffer 777 int hci_send_sco_packet_buffer(int size){ 778 779 // log_info("hci_send_acl_packet_buffer size %u", size); 780 781 if (!hci_stack->hci_packet_buffer_reserved) { 782 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 783 return 0; 784 } 785 786 uint8_t * packet = hci_stack->hci_packet_buffer; 787 788 // skip checks in loopback mode 789 if (!hci_stack->loopback_mode){ 790 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 791 792 // check for free places on Bluetooth module 793 if (!hci_can_send_prepared_sco_packet_now()) { 794 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 return BTSTACK_ACL_BUFFERS_FULL; 798 } 799 800 // track send packet in connection struct 801 hci_connection_t *connection = hci_connection_for_handle( con_handle); 802 if (!connection) { 803 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 804 hci_release_packet_buffer(); 805 hci_emit_transport_packet_sent(); 806 return 0; 807 } 808 809 if (hci_have_usb_transport()){ 810 // token used 811 hci_stack->sco_can_send_now = 0; 812 } else { 813 if (hci_stack->synchronous_flow_control_enabled){ 814 connection->num_packets_sent++; 815 } else { 816 connection->sco_tx_ready--; 817 } 818 } 819 } 820 821 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 822 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 823 824 if (hci_transport_synchronous()){ 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 } 828 829 return err; 830 } 831 #endif 832 833 static void acl_handler(uint8_t *packet, uint16_t size){ 834 835 // get info 836 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 837 hci_connection_t *conn = hci_connection_for_handle(con_handle); 838 uint8_t acl_flags = READ_ACL_FLAGS(packet); 839 uint16_t acl_length = READ_ACL_LENGTH(packet); 840 841 // ignore non-registered handle 842 if (!conn){ 843 log_error("acl_handler called with non-registered handle %u!" , con_handle); 844 return; 845 } 846 847 // assert packet is complete 848 if ((acl_length + 4u) != size){ 849 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 850 return; 851 } 852 853 #ifdef ENABLE_CLASSIC 854 // update idle timestamp 855 hci_connection_timestamp(conn); 856 #endif 857 858 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 859 hci_stack->host_completed_packets = 1; 860 conn->num_packets_completed++; 861 #endif 862 863 // handle different packet types 864 switch (acl_flags & 0x03u) { 865 866 case 0x01: // continuation fragment 867 868 // sanity checks 869 if (conn->acl_recombination_pos == 0u) { 870 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 871 return; 872 } 873 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 874 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 875 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 876 conn->acl_recombination_pos = 0; 877 return; 878 } 879 880 // append fragment payload (header already stored) 881 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 882 &packet[4], acl_length); 883 conn->acl_recombination_pos += acl_length; 884 885 // forward complete L2CAP packet if complete. 886 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 887 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 888 // reset recombination buffer 889 conn->acl_recombination_length = 0; 890 conn->acl_recombination_pos = 0; 891 } 892 break; 893 894 case 0x02: { // first fragment 895 896 // sanity check 897 if (conn->acl_recombination_pos) { 898 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 899 conn->acl_recombination_pos = 0; 900 } 901 902 // peek into L2CAP packet! 903 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 904 905 // compare fragment size to L2CAP packet size 906 if (acl_length >= (l2cap_length + 4u)){ 907 // forward fragment as L2CAP packet 908 hci_emit_acl_packet(packet, acl_length + 4u); 909 } else { 910 911 if (acl_length > HCI_ACL_BUFFER_SIZE){ 912 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 913 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 914 return; 915 } 916 917 // store first fragment and tweak acl length for complete package 918 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 919 packet, acl_length + 4u); 920 conn->acl_recombination_pos = acl_length + 4u; 921 conn->acl_recombination_length = l2cap_length; 922 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 923 } 924 break; 925 926 } 927 default: 928 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 929 return; 930 } 931 932 // execute main loop 933 hci_run(); 934 } 935 936 static void hci_shutdown_connection(hci_connection_t *conn){ 937 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 938 939 #ifdef ENABLE_CLASSIC 940 #ifdef ENABLE_SCO_OVER_HCI 941 int addr_type = conn->address_type; 942 #endif 943 #endif 944 945 btstack_run_loop_remove_timer(&conn->timeout); 946 947 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 948 btstack_memory_hci_connection_free( conn ); 949 950 // now it's gone 951 hci_emit_nr_connections_changed(); 952 953 #ifdef ENABLE_CLASSIC 954 #ifdef ENABLE_SCO_OVER_HCI 955 // update SCO 956 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 957 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 958 } 959 #endif 960 #endif 961 } 962 963 #ifdef ENABLE_CLASSIC 964 965 static const uint16_t packet_type_sizes[] = { 966 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 967 HCI_ACL_DH1_SIZE, 0, 0, 0, 968 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 969 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 970 }; 971 static const uint8_t packet_type_feature_requirement_bit[] = { 972 0, // 3 slot packets 973 1, // 5 slot packets 974 25, // EDR 2 mpbs 975 26, // EDR 3 mbps 976 39, // 3 slot EDR packts 977 40, // 5 slot EDR packet 978 }; 979 static const uint16_t packet_type_feature_packet_mask[] = { 980 0x0f00, // 3 slot packets 981 0xf000, // 5 slot packets 982 0x1102, // EDR 2 mpbs 983 0x2204, // EDR 3 mbps 984 0x0300, // 3 slot EDR packts 985 0x3000, // 5 slot EDR packet 986 }; 987 988 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 989 // enable packet types based on size 990 uint16_t packet_types = 0; 991 unsigned int i; 992 for (i=0;i<16;i++){ 993 if (packet_type_sizes[i] == 0) continue; 994 if (packet_type_sizes[i] <= buffer_size){ 995 packet_types |= 1 << i; 996 } 997 } 998 // disable packet types due to missing local supported features 999 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1000 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1001 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1002 if (feature_set) continue; 1003 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1004 packet_types &= ~packet_type_feature_packet_mask[i]; 1005 } 1006 // flip bits for "may not be used" 1007 packet_types ^= 0x3306; 1008 return packet_types; 1009 } 1010 1011 uint16_t hci_usable_acl_packet_types(void){ 1012 return hci_stack->packet_types; 1013 } 1014 #endif 1015 1016 uint8_t* hci_get_outgoing_packet_buffer(void){ 1017 // hci packet buffer is >= acl data packet length 1018 return hci_stack->hci_packet_buffer; 1019 } 1020 1021 uint16_t hci_max_acl_data_packet_length(void){ 1022 return hci_stack->acl_data_packet_length; 1023 } 1024 1025 #ifdef ENABLE_CLASSIC 1026 int hci_extended_sco_link_supported(void){ 1027 // No. 31, byte 3, bit 7 1028 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1029 } 1030 #endif 1031 1032 int hci_non_flushable_packet_boundary_flag_supported(void){ 1033 // No. 54, byte 6, bit 6 1034 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1035 } 1036 1037 static int gap_ssp_supported(void){ 1038 // No. 51, byte 6, bit 3 1039 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1040 } 1041 1042 static int hci_classic_supported(void){ 1043 #ifdef ENABLE_CLASSIC 1044 // No. 37, byte 4, bit 5, = No BR/EDR Support 1045 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1046 #else 1047 return 0; 1048 #endif 1049 } 1050 1051 static int hci_le_supported(void){ 1052 #ifdef ENABLE_BLE 1053 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1054 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1055 #else 1056 return 0; 1057 #endif 1058 } 1059 1060 #ifdef ENABLE_BLE 1061 1062 /** 1063 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1064 */ 1065 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1066 *addr_type = hci_stack->le_own_addr_type; 1067 if (hci_stack->le_own_addr_type){ 1068 (void)memcpy(addr, hci_stack->le_random_address, 6); 1069 } else { 1070 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1071 } 1072 } 1073 1074 #ifdef ENABLE_LE_CENTRAL 1075 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1076 1077 int offset = 3; 1078 int num_reports = packet[offset]; 1079 offset += 1; 1080 1081 int i; 1082 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1083 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1084 for (i=0; (i<num_reports) && (offset < size);i++){ 1085 // sanity checks on data_length: 1086 uint8_t data_length = packet[offset + 8]; 1087 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1088 if ((offset + 9u + data_length + 1u) > size) return; 1089 // setup event 1090 uint8_t event_size = 10u + data_length; 1091 int pos = 0; 1092 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1093 event[pos++] = event_size; 1094 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1095 offset += 8; 1096 pos += 8; 1097 event[pos++] = packet[offset + 1 + data_length]; // rssi 1098 event[pos++] = data_length; 1099 offset++; 1100 (void)memcpy(&event[pos], &packet[offset], data_length); 1101 pos += data_length; 1102 offset += data_length + 1u; // rssi 1103 hci_emit_event(event, pos, 1); 1104 } 1105 } 1106 #endif 1107 #endif 1108 1109 #ifdef ENABLE_BLE 1110 #ifdef ENABLE_LE_PERIPHERAL 1111 static void hci_reenable_advertisements_if_needed(void){ 1112 if (!hci_stack->le_advertisements_active && hci_stack->le_advertisements_enabled){ 1113 // get number of active le slave connections 1114 int num_slave_connections = 0; 1115 btstack_linked_list_iterator_t it; 1116 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1117 while (btstack_linked_list_iterator_has_next(&it)){ 1118 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1119 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1120 if (con->state != OPEN) continue; 1121 if (con->role != HCI_ROLE_SLAVE) continue; 1122 if (!hci_is_le_connection(con)) continue; 1123 num_slave_connections++; 1124 } 1125 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1126 if (num_slave_connections < hci_stack->le_max_number_peripheral_connections){ 1127 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 1128 } 1129 } 1130 } 1131 #endif 1132 #endif 1133 1134 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1135 1136 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1137 if (!hci_stack->config) return 0; 1138 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1139 // Limit baud rate for Broadcom chipsets to 3 mbps 1140 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1141 baud_rate = 3000000; 1142 } 1143 return baud_rate; 1144 } 1145 1146 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1147 UNUSED(ds); 1148 1149 switch (hci_stack->substate){ 1150 case HCI_INIT_W4_SEND_RESET: 1151 log_info("Resend HCI Reset"); 1152 hci_stack->substate = HCI_INIT_SEND_RESET; 1153 hci_stack->num_cmd_packets = 1; 1154 hci_run(); 1155 break; 1156 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1157 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1158 if (hci_stack->hci_transport->reset_link){ 1159 hci_stack->hci_transport->reset_link(); 1160 } 1161 1162 /* fall through */ 1163 1164 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1165 log_info("Resend HCI Reset - CSR Warm Boot"); 1166 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1167 hci_stack->num_cmd_packets = 1; 1168 hci_run(); 1169 break; 1170 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1171 if (hci_stack->hci_transport->set_baudrate){ 1172 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1173 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1174 hci_stack->hci_transport->set_baudrate(baud_rate); 1175 } 1176 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1177 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1178 if (hci_stack->hci_transport->reset_link){ 1179 log_info("Link Reset"); 1180 hci_stack->hci_transport->reset_link(); 1181 } 1182 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1183 hci_run(); 1184 } 1185 break; 1186 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1187 // otherwise continue 1188 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1189 hci_send_cmd(&hci_read_local_supported_commands); 1190 break; 1191 default: 1192 break; 1193 } 1194 } 1195 #endif 1196 1197 static void hci_initializing_next_state(void){ 1198 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1199 } 1200 1201 // assumption: hci_can_send_command_packet_now() == true 1202 static void hci_initializing_run(void){ 1203 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1204 switch (hci_stack->substate){ 1205 case HCI_INIT_SEND_RESET: 1206 hci_state_reset(); 1207 1208 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1209 // prepare reset if command complete not received in 100ms 1210 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1211 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1212 btstack_run_loop_add_timer(&hci_stack->timeout); 1213 #endif 1214 // send command 1215 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1216 hci_send_cmd(&hci_reset); 1217 break; 1218 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1219 hci_send_cmd(&hci_read_local_version_information); 1220 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1221 break; 1222 case HCI_INIT_SEND_READ_LOCAL_NAME: 1223 hci_send_cmd(&hci_read_local_name); 1224 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1225 break; 1226 1227 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1228 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1229 hci_state_reset(); 1230 // prepare reset if command complete not received in 100ms 1231 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1232 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1233 btstack_run_loop_add_timer(&hci_stack->timeout); 1234 // send command 1235 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1236 hci_send_cmd(&hci_reset); 1237 break; 1238 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1239 hci_state_reset(); 1240 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1241 hci_send_cmd(&hci_reset); 1242 break; 1243 case HCI_INIT_SEND_BAUD_CHANGE: { 1244 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1245 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1246 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1247 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1248 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1249 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1250 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1251 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1252 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1253 btstack_run_loop_add_timer(&hci_stack->timeout); 1254 } 1255 break; 1256 } 1257 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1258 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1259 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1260 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1261 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1262 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1263 break; 1264 } 1265 case HCI_INIT_CUSTOM_INIT: 1266 // Custom initialization 1267 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1268 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1269 int send_cmd = 0; 1270 switch (hci_stack->chipset_result){ 1271 case BTSTACK_CHIPSET_VALID_COMMAND: 1272 send_cmd = 1; 1273 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1274 break; 1275 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1276 send_cmd = 1; 1277 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1278 log_info("CSR Warm Boot"); 1279 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1280 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1281 btstack_run_loop_add_timer(&hci_stack->timeout); 1282 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1283 && hci_stack->config 1284 && hci_stack->chipset 1285 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1286 && hci_stack->hci_transport->set_baudrate 1287 && hci_transport_uart_get_main_baud_rate()){ 1288 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1289 } else { 1290 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1291 } 1292 break; 1293 default: 1294 break; 1295 } 1296 1297 if (send_cmd){ 1298 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1299 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1300 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1301 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1302 break; 1303 } 1304 log_info("Init script done"); 1305 1306 // Init script download on Broadcom chipsets causes: 1307 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1308 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1309 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1310 1311 // - baud rate to reset, restore UART baud rate if needed 1312 int need_baud_change = hci_stack->config 1313 && hci_stack->chipset 1314 && hci_stack->chipset->set_baudrate_command 1315 && hci_stack->hci_transport->set_baudrate 1316 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1317 if (need_baud_change) { 1318 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1319 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1320 hci_stack->hci_transport->set_baudrate(baud_rate); 1321 } 1322 1323 uint16_t bcm_delay_ms = 300; 1324 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1325 // -> Work around: wait here. 1326 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1327 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1328 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1329 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1330 btstack_run_loop_add_timer(&hci_stack->timeout); 1331 break; 1332 } 1333 } 1334 // otherwise continue 1335 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1336 hci_send_cmd(&hci_read_local_supported_commands); 1337 break; 1338 case HCI_INIT_SET_BD_ADDR: 1339 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1340 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1341 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1342 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1343 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1344 break; 1345 #endif 1346 1347 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1348 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1349 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1350 hci_send_cmd(&hci_read_local_supported_commands); 1351 break; 1352 case HCI_INIT_READ_BD_ADDR: 1353 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1354 hci_send_cmd(&hci_read_bd_addr); 1355 break; 1356 case HCI_INIT_READ_BUFFER_SIZE: 1357 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1358 hci_send_cmd(&hci_read_buffer_size); 1359 break; 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1361 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1362 hci_send_cmd(&hci_read_local_supported_features); 1363 break; 1364 1365 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1366 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1367 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1368 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1369 break; 1370 case HCI_INIT_HOST_BUFFER_SIZE: 1371 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1372 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1373 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1374 break; 1375 #endif 1376 1377 case HCI_INIT_SET_EVENT_MASK: 1378 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1379 if (hci_le_supported()){ 1380 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1381 } else { 1382 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1383 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1384 } 1385 break; 1386 1387 #ifdef ENABLE_CLASSIC 1388 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1389 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1390 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1391 break; 1392 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1393 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1394 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1395 break; 1396 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1397 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1398 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1399 break; 1400 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1401 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1402 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1403 break; 1404 case HCI_INIT_WRITE_LOCAL_NAME: { 1405 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1406 hci_reserve_packet_buffer(); 1407 uint8_t * packet = hci_stack->hci_packet_buffer; 1408 // construct HCI Command and send 1409 uint16_t opcode = hci_write_local_name.opcode; 1410 hci_stack->last_cmd_opcode = opcode; 1411 packet[0] = opcode & 0xff; 1412 packet[1] = opcode >> 8; 1413 packet[2] = DEVICE_NAME_LEN; 1414 memset(&packet[3], 0, DEVICE_NAME_LEN); 1415 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1416 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1417 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1418 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1419 // expand '00:00:00:00:00:00' in name with bd_addr 1420 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1421 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1422 break; 1423 } 1424 case HCI_INIT_WRITE_EIR_DATA: { 1425 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1426 hci_reserve_packet_buffer(); 1427 uint8_t * packet = hci_stack->hci_packet_buffer; 1428 // construct HCI Command in-place and send 1429 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1430 hci_stack->last_cmd_opcode = opcode; 1431 uint16_t offset = 0; 1432 packet[offset++] = opcode & 0xff; 1433 packet[offset++] = opcode >> 8; 1434 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1435 packet[offset++] = 0; // FEC not required 1436 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1437 if (hci_stack->eir_data){ 1438 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1439 ad_context_t context; 1440 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1441 uint8_t data_type = ad_iterator_get_data_type(&context); 1442 uint8_t size = ad_iterator_get_data_len(&context); 1443 const uint8_t *data = ad_iterator_get_data(&context); 1444 // copy item 1445 packet[offset++] = size + 1; 1446 packet[offset++] = data_type; 1447 memcpy(&packet[offset], data, size); 1448 // update name item 1449 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1450 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1451 } 1452 offset += size; 1453 } 1454 } else { 1455 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1456 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1457 packet[offset++] = bytes_to_copy + 1; 1458 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1459 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1460 // expand '00:00:00:00:00:00' in name with bd_addr 1461 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1462 } 1463 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1464 break; 1465 } 1466 case HCI_INIT_WRITE_INQUIRY_MODE: 1467 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1468 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1469 break; 1470 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1471 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1472 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1473 break; 1474 case HCI_INIT_WRITE_SCAN_ENABLE: 1475 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1476 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1477 break; 1478 // only sent if ENABLE_SCO_OVER_HCI is defined 1479 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1481 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1482 break; 1483 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1484 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1485 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1486 break; 1487 // only sent if ENABLE_SCO_OVER_HCI and manufacturer is Broadcom 1488 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1489 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1490 log_info("BCM: Route SCO data via HCI transport"); 1491 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1492 break; 1493 1494 #endif 1495 #ifdef ENABLE_BLE 1496 // LE INIT 1497 case HCI_INIT_LE_READ_BUFFER_SIZE: 1498 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1499 hci_send_cmd(&hci_le_read_buffer_size); 1500 break; 1501 case HCI_INIT_LE_SET_EVENT_MASK: 1502 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1503 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1504 break; 1505 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1506 // LE Supported Host = 1, Simultaneous Host = 0 1507 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1508 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1509 break; 1510 #endif 1511 1512 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1513 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1514 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1515 hci_send_cmd(&hci_le_read_maximum_data_length); 1516 break; 1517 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1518 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1519 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1520 break; 1521 #endif 1522 1523 #ifdef ENABLE_LE_CENTRAL 1524 case HCI_INIT_READ_WHITE_LIST_SIZE: 1525 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1526 hci_send_cmd(&hci_le_read_white_list_size); 1527 break; 1528 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1529 // LE Scan Parameters: active scanning, 300 ms interval, 30 ms window, own address type, accept all advs 1530 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1531 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); 1532 break; 1533 #endif 1534 default: 1535 return; 1536 } 1537 } 1538 1539 static void hci_init_done(void){ 1540 // done. tell the app 1541 log_info("hci_init_done -> HCI_STATE_WORKING"); 1542 hci_stack->state = HCI_STATE_WORKING; 1543 hci_emit_state(); 1544 hci_run(); 1545 } 1546 1547 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1548 bool command_completed = false; 1549 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1550 uint16_t opcode = little_endian_read_16(packet,3); 1551 if (opcode == hci_stack->last_cmd_opcode){ 1552 command_completed = true; 1553 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1554 } else { 1555 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1556 } 1557 } 1558 1559 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1560 uint8_t status = packet[2]; 1561 uint16_t opcode = little_endian_read_16(packet,4); 1562 if (opcode == hci_stack->last_cmd_opcode){ 1563 if (status){ 1564 command_completed = true; 1565 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1566 } else { 1567 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1568 } 1569 } else { 1570 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1571 } 1572 } 1573 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1574 // Vendor == CSR 1575 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1576 // TODO: track actual command 1577 command_completed = true; 1578 } 1579 1580 // Vendor == Toshiba 1581 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1582 // TODO: track actual command 1583 command_completed = true; 1584 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1585 hci_stack->num_cmd_packets = 1; 1586 } 1587 #endif 1588 1589 return command_completed; 1590 } 1591 1592 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1593 1594 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1595 1596 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1597 1598 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1599 1600 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1601 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1602 // 1603 // HCI Reset 1604 // Timeout 100 ms 1605 // HCI Reset 1606 // Command Complete Reset 1607 // HCI Read Local Version Information 1608 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1609 // hang... 1610 // 1611 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1612 if (!command_completed 1613 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1614 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1615 1616 uint16_t opcode = little_endian_read_16(packet,3); 1617 if (opcode == hci_reset.opcode){ 1618 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1619 return; 1620 } 1621 } 1622 1623 // CSR & H5 1624 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1625 if (!command_completed 1626 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1627 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1628 1629 uint16_t opcode = little_endian_read_16(packet,3); 1630 if (opcode == hci_reset.opcode){ 1631 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1632 return; 1633 } 1634 } 1635 1636 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1637 // fix: Correct substate and behave as command below 1638 if (command_completed){ 1639 switch (hci_stack->substate){ 1640 case HCI_INIT_SEND_RESET: 1641 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1642 break; 1643 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1644 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1645 break; 1646 default: 1647 break; 1648 } 1649 } 1650 1651 #endif 1652 1653 if (!command_completed) return; 1654 1655 bool need_baud_change = false; 1656 bool need_addr_change = false; 1657 1658 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1659 need_baud_change = hci_stack->config 1660 && hci_stack->chipset 1661 && hci_stack->chipset->set_baudrate_command 1662 && hci_stack->hci_transport->set_baudrate 1663 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1664 1665 need_addr_change = hci_stack->custom_bd_addr_set 1666 && hci_stack->chipset 1667 && hci_stack->chipset->set_bd_addr_command; 1668 #endif 1669 1670 switch(hci_stack->substate){ 1671 1672 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1673 case HCI_INIT_SEND_RESET: 1674 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1675 // fix: just correct substate and behave as command below 1676 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1677 btstack_run_loop_remove_timer(&hci_stack->timeout); 1678 break; 1679 case HCI_INIT_W4_SEND_RESET: 1680 btstack_run_loop_remove_timer(&hci_stack->timeout); 1681 break; 1682 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1683 log_info("Received local name, need baud change %d", (int) need_baud_change); 1684 if (need_baud_change){ 1685 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1686 return; 1687 } 1688 // skip baud change 1689 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1690 return; 1691 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1692 // for STLC2500D, baud rate change already happened. 1693 // for others, baud rate gets changed now 1694 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1695 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1696 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1697 hci_stack->hci_transport->set_baudrate(baud_rate); 1698 } 1699 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1700 return; 1701 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1702 btstack_run_loop_remove_timer(&hci_stack->timeout); 1703 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1704 return; 1705 case HCI_INIT_W4_CUSTOM_INIT: 1706 // repeat custom init 1707 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1708 return; 1709 #else 1710 case HCI_INIT_W4_SEND_RESET: 1711 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1712 return ; 1713 #endif 1714 1715 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1716 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1717 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1718 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1719 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1720 return; 1721 } 1722 if (need_addr_change){ 1723 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1724 return; 1725 } 1726 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1727 return; 1728 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1729 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1730 if (need_baud_change){ 1731 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1732 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1733 hci_stack->hci_transport->set_baudrate(baud_rate); 1734 } 1735 if (need_addr_change){ 1736 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1737 return; 1738 } 1739 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1740 return; 1741 case HCI_INIT_W4_SET_BD_ADDR: 1742 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1743 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1744 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1745 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1746 return; 1747 } 1748 // skipping st warm boot 1749 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1750 return; 1751 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1752 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1753 return; 1754 #endif 1755 case HCI_INIT_W4_READ_BD_ADDR: 1756 // only read buffer size if supported 1757 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1758 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1759 return; 1760 } 1761 // skipping read buffer size 1762 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1763 return; 1764 case HCI_INIT_W4_SET_EVENT_MASK: 1765 // skip Classic init commands for LE only chipsets 1766 if (!hci_classic_supported()){ 1767 #ifdef ENABLE_BLE 1768 if (hci_le_supported()){ 1769 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1770 return; 1771 } 1772 #endif 1773 log_error("Neither BR/EDR nor LE supported"); 1774 hci_init_done(); 1775 return; 1776 } 1777 if (!gap_ssp_supported()){ 1778 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1779 return; 1780 } 1781 break; 1782 #ifdef ENABLE_BLE 1783 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1784 // skip write le host if not supported (e.g. on LE only EM9301) 1785 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1786 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1787 return; 1788 1789 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1790 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1791 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1792 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1793 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1794 return; 1795 } 1796 // explicit fall through to reduce repetitions 1797 1798 #ifdef ENABLE_LE_CENTRAL 1799 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1800 #else 1801 hci_init_done(); 1802 #endif 1803 return; 1804 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1805 1806 #endif /* ENABLE_BLE */ 1807 1808 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1809 // skip write secure connections host support if not supported or disabled 1810 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1811 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1812 return; 1813 } 1814 break; 1815 1816 #ifdef ENABLE_SCO_OVER_HCI 1817 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1818 // skip write synchronous flow control if not supported 1819 if (hci_stack->local_supported_commands[0] & 0x04) break; 1820 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1821 1822 /* fall through */ 1823 1824 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1825 // skip write default erroneous data reporting if not supported 1826 if (hci_stack->local_supported_commands[0] & 0x08) break; 1827 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1828 1829 /* fall through */ 1830 1831 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1832 // skip bcm set sco pcm config on non-Broadcom chipsets 1833 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1834 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1835 1836 /* fall through */ 1837 1838 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1839 if (!hci_le_supported()){ 1840 // SKIP LE init for Classic only configuration 1841 hci_init_done(); 1842 return; 1843 } 1844 break; 1845 1846 #else /* !ENABLE_SCO_OVER_HCI */ 1847 1848 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1849 #ifdef ENABLE_BLE 1850 if (hci_le_supported()){ 1851 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1852 return; 1853 } 1854 #endif 1855 // SKIP LE init for Classic only configuration 1856 hci_init_done(); 1857 return; 1858 #endif /* ENABLE_SCO_OVER_HCI */ 1859 1860 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1861 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1862 // Response to command before init done state -> init done 1863 case (HCI_INIT_DONE-1): 1864 hci_init_done(); 1865 return; 1866 #endif 1867 1868 default: 1869 break; 1870 } 1871 hci_initializing_next_state(); 1872 } 1873 1874 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1875 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1876 bd_addr_t bd_address; 1877 (void)memcpy(&bd_address, conn->address, 6); 1878 1879 #ifdef ENABLE_CLASSIC 1880 // cache needed data 1881 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1882 #endif 1883 1884 // connection failed, remove entry 1885 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1886 btstack_memory_hci_connection_free( conn ); 1887 1888 #ifdef ENABLE_CLASSIC 1889 // notify client if dedicated bonding 1890 if (notify_dedicated_bonding_failed){ 1891 log_info("hci notify_dedicated_bonding_failed"); 1892 hci_emit_dedicated_bonding_result(bd_address, status); 1893 } 1894 1895 // if authentication error, also delete link key 1896 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1897 gap_drop_link_key_for_bd_addr(bd_address); 1898 } 1899 #endif 1900 } 1901 1902 #ifdef ENABLE_CLASSIC 1903 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1904 // SSP Controller 1905 if (features[6] & (1 << 3)){ 1906 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1907 } 1908 // eSCO 1909 if (features[3] & (1<<7)){ 1910 conn->remote_supported_features[0] |= 1; 1911 } 1912 // Extended features 1913 if (features[7] & (1<<7)){ 1914 conn->remote_supported_features[0] |= 2; 1915 } 1916 } 1917 1918 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1919 // SSP Host 1920 if (features[0] & (1 << 0)){ 1921 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1922 } 1923 // SC Host 1924 if (features[0] & (1 << 3)){ 1925 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1926 } 1927 } 1928 1929 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1930 // SC Controller 1931 if (features[1] & (1 << 0)){ 1932 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1933 } 1934 } 1935 1936 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1937 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1938 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1939 if (conn->bonding_flags & BONDING_DEDICATED){ 1940 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1941 } 1942 } 1943 #endif 1944 1945 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1946 // handle BT initialization 1947 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1948 hci_initializing_event_handler(packet, size); 1949 } 1950 1951 // help with BT sleep 1952 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1953 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1954 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1955 hci_initializing_next_state(); 1956 } 1957 } 1958 1959 #ifdef ENABLE_CLASSIC 1960 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1961 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1962 conn->encryption_key_size = encryption_key_size; 1963 1964 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1965 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1966 return; 1967 } 1968 1969 // Request Authentication if not already done 1970 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 1971 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1972 } 1973 #endif 1974 1975 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 1976 UNUSED(size); 1977 1978 uint16_t manufacturer; 1979 #ifdef ENABLE_CLASSIC 1980 hci_con_handle_t handle; 1981 hci_connection_t * conn; 1982 uint8_t status; 1983 #endif 1984 // get num cmd packets - limit to 1 to reduce complexity 1985 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 1986 1987 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 1988 switch (opcode){ 1989 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 1990 if (packet[5]) break; 1991 // terminate, name 248 chars 1992 packet[6+248] = 0; 1993 log_info("local name: %s", &packet[6]); 1994 break; 1995 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 1996 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 1997 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1998 uint16_t acl_len = little_endian_read_16(packet, 6); 1999 uint16_t sco_len = packet[8]; 2000 2001 // determine usable ACL/SCO payload size 2002 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2003 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2004 2005 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2006 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2007 2008 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2009 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2010 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2011 } 2012 break; 2013 case HCI_OPCODE_HCI_READ_RSSI: 2014 if (packet[5] == ERROR_CODE_SUCCESS){ 2015 uint8_t event[5]; 2016 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2017 event[1] = 3; 2018 (void)memcpy(&event[2], &packet[6], 3); 2019 hci_emit_event(event, sizeof(event), 1); 2020 } 2021 break; 2022 #ifdef ENABLE_BLE 2023 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2024 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2025 hci_stack->le_acl_packets_total_num = packet[8]; 2026 // determine usable ACL payload size 2027 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2028 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2029 } 2030 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2031 break; 2032 #endif 2033 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2034 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2035 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2036 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2037 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); 2038 break; 2039 #endif 2040 #ifdef ENABLE_LE_CENTRAL 2041 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2042 hci_stack->le_whitelist_capacity = packet[6]; 2043 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2044 break; 2045 #endif 2046 case HCI_OPCODE_HCI_READ_BD_ADDR: 2047 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2048 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)); 2049 #ifdef ENABLE_CLASSIC 2050 if (hci_stack->link_key_db){ 2051 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2052 } 2053 #endif 2054 break; 2055 #ifdef ENABLE_CLASSIC 2056 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2057 hci_emit_discoverable_enabled(hci_stack->discoverable); 2058 break; 2059 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2060 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2061 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2062 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2063 hci_emit_event(event, sizeof(event), 1); 2064 } 2065 break; 2066 #endif 2067 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2068 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2069 2070 #ifdef ENABLE_CLASSIC 2071 // determine usable ACL packet types based on host buffer size and supported features 2072 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2073 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2074 #endif 2075 // Classic/LE 2076 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2077 break; 2078 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2079 manufacturer = little_endian_read_16(packet, 10); 2080 // map Cypress to Broadcom 2081 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2082 log_info("Treat Cypress as Broadcom"); 2083 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2084 little_endian_store_16(packet, 10, manufacturer); 2085 } 2086 hci_stack->manufacturer = manufacturer; 2087 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2088 break; 2089 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2090 hci_stack->local_supported_commands[0] = 2091 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2092 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2093 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2094 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2095 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2096 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2097 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2098 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2099 hci_stack->local_supported_commands[1] = 2100 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2101 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u); // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2102 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2103 break; 2104 #ifdef ENABLE_CLASSIC 2105 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2106 if (packet[5]) return; 2107 hci_stack->synchronous_flow_control_enabled = 1; 2108 break; 2109 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2110 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2111 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2112 conn = hci_connection_for_handle(handle); 2113 if (conn != NULL) { 2114 uint8_t key_size = 0; 2115 if (status == 0){ 2116 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2117 log_info("Handle %x04x key Size: %u", handle, key_size); 2118 } else { 2119 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2120 } 2121 hci_handle_read_encryption_key_size_complete(conn, key_size); 2122 } 2123 break; 2124 #endif 2125 default: 2126 break; 2127 } 2128 } 2129 2130 static void event_handler(uint8_t *packet, uint16_t size){ 2131 2132 uint16_t event_length = packet[1]; 2133 2134 // assert packet is complete 2135 if (size != (event_length + 2u)){ 2136 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2137 return; 2138 } 2139 2140 bd_addr_t addr; 2141 bd_addr_type_t addr_type; 2142 hci_con_handle_t handle; 2143 hci_connection_t * conn; 2144 int i; 2145 int create_connection_cmd; 2146 2147 #ifdef ENABLE_CLASSIC 2148 uint8_t link_type; 2149 #endif 2150 2151 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2152 2153 switch (hci_event_packet_get_type(packet)) { 2154 2155 case HCI_EVENT_COMMAND_COMPLETE: 2156 handle_command_complete_event(packet, size); 2157 break; 2158 2159 case HCI_EVENT_COMMAND_STATUS: 2160 // get num cmd packets - limit to 1 to reduce complexity 2161 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2162 2163 // check command status to detected failed outgoing connections 2164 create_connection_cmd = 0; 2165 #ifdef ENABLE_CLASSIC 2166 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2167 create_connection_cmd = 1; 2168 } 2169 #endif 2170 #ifdef ENABLE_LE_CENTRAL 2171 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2172 create_connection_cmd = 1; 2173 } 2174 #endif 2175 if (create_connection_cmd) { 2176 uint8_t status = hci_event_command_status_get_status(packet); 2177 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, hci_stack->outgoing_addr_type); 2178 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); 2179 2180 // reset outgoing address info 2181 memset(hci_stack->outgoing_addr, 0, 6); 2182 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2183 2184 // error => outgoing connection failed 2185 if ((conn != NULL) && (status != 0u)){ 2186 hci_handle_connection_failed(conn, status); 2187 } 2188 } 2189 break; 2190 2191 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2192 if (size < 3) return; 2193 uint16_t num_handles = packet[2]; 2194 if (size != (3u + num_handles * 4u)) return; 2195 uint16_t offset = 3; 2196 for (i=0; i<num_handles;i++){ 2197 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2198 offset += 2u; 2199 uint16_t num_packets = little_endian_read_16(packet, offset); 2200 offset += 2u; 2201 2202 conn = hci_connection_for_handle(handle); 2203 if (!conn){ 2204 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2205 continue; 2206 } 2207 2208 if (conn->num_packets_sent >= num_packets){ 2209 conn->num_packets_sent -= num_packets; 2210 } else { 2211 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2212 conn->num_packets_sent = 0; 2213 } 2214 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2215 2216 #ifdef ENABLE_CLASSIC 2217 // For SCO, we do the can_send_now_check here 2218 hci_notify_if_sco_can_send_now(); 2219 #endif 2220 } 2221 break; 2222 } 2223 2224 #ifdef ENABLE_CLASSIC 2225 case HCI_EVENT_INQUIRY_COMPLETE: 2226 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2227 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2228 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2229 hci_emit_event(event, sizeof(event), 1); 2230 } 2231 break; 2232 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2233 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2234 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2235 } 2236 break; 2237 case HCI_EVENT_CONNECTION_REQUEST: 2238 reverse_bd_addr(&packet[2], addr); 2239 if (hci_stack->gap_classic_accept_callback != NULL){ 2240 if ((*hci_stack->gap_classic_accept_callback)(addr) == 0){ 2241 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2242 bd_addr_copy(hci_stack->decline_addr, addr); 2243 break; 2244 } 2245 } 2246 2247 // TODO: eval COD 8-10 2248 link_type = packet[11]; 2249 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), link_type); 2250 addr_type = (link_type == 1) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2251 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2252 if (!conn) { 2253 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2254 } 2255 if (!conn) { 2256 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2257 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2258 bd_addr_copy(hci_stack->decline_addr, addr); 2259 break; 2260 } 2261 conn->role = HCI_ROLE_SLAVE; 2262 conn->state = RECEIVED_CONNECTION_REQUEST; 2263 // store info about eSCO 2264 if (link_type == 0x02){ 2265 conn->remote_supported_features[0] |= 1; 2266 } 2267 hci_run(); 2268 break; 2269 2270 case HCI_EVENT_CONNECTION_COMPLETE: 2271 // Connection management 2272 reverse_bd_addr(&packet[5], addr); 2273 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2274 addr_type = BD_ADDR_TYPE_ACL; 2275 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2276 if (conn) { 2277 if (!packet[2]){ 2278 conn->state = OPEN; 2279 conn->con_handle = little_endian_read_16(packet, 3); 2280 2281 // queue get remote feature 2282 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2283 2284 // queue set supervision timeout if we're master 2285 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2286 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2287 } 2288 2289 // restart timer 2290 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2291 btstack_run_loop_add_timer(&conn->timeout); 2292 2293 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2294 2295 hci_emit_nr_connections_changed(); 2296 } else { 2297 // connection failed 2298 hci_handle_connection_failed(conn, packet[2]); 2299 } 2300 } 2301 break; 2302 2303 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2304 reverse_bd_addr(&packet[5], addr); 2305 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2306 if (packet[2]){ 2307 // connection failed 2308 break; 2309 } 2310 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2311 if (!conn) { 2312 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2313 } 2314 if (!conn) { 2315 break; 2316 } 2317 conn->state = OPEN; 2318 conn->con_handle = little_endian_read_16(packet, 3); 2319 2320 #ifdef ENABLE_SCO_OVER_HCI 2321 // update SCO 2322 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2323 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2324 } 2325 // trigger can send now 2326 if (hci_have_usb_transport()){ 2327 hci_stack->sco_can_send_now = 1; 2328 } 2329 #endif 2330 break; 2331 2332 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2333 handle = little_endian_read_16(packet, 3); 2334 conn = hci_connection_for_handle(handle); 2335 if (!conn) break; 2336 if (!packet[2]){ 2337 const uint8_t * features = &packet[5]; 2338 hci_handle_remote_features_page_0(conn, features); 2339 2340 // read extended features if possible 2341 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2342 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2343 break; 2344 } 2345 } 2346 hci_handle_remote_features_received(conn); 2347 break; 2348 2349 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2350 handle = little_endian_read_16(packet, 3); 2351 conn = hci_connection_for_handle(handle); 2352 if (!conn) break; 2353 // status = ok, page = 1 2354 if (!packet[2]) { 2355 uint8_t page_number = packet[5]; 2356 uint8_t maximum_page_number = packet[6]; 2357 const uint8_t * features = &packet[7]; 2358 bool done = false; 2359 switch (page_number){ 2360 case 1: 2361 hci_handle_remote_features_page_1(conn, features); 2362 if (maximum_page_number >= 2){ 2363 // get Secure Connections (Controller) from Page 2 if available 2364 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2365 } else { 2366 // otherwise, assume SC (Controller) == SC (Host) 2367 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2368 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2369 } 2370 done = true; 2371 } 2372 break; 2373 case 2: 2374 hci_handle_remote_features_page_2(conn, features); 2375 done = true; 2376 break; 2377 default: 2378 break; 2379 } 2380 if (!done) break; 2381 } 2382 hci_handle_remote_features_received(conn); 2383 break; 2384 2385 case HCI_EVENT_LINK_KEY_REQUEST: 2386 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2387 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2388 // non-bondable mode: link key negative reply will be sent by HANDLE_LINK_KEY_REQUEST 2389 if (hci_stack->bondable && !hci_stack->link_key_db) break; 2390 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2391 hci_run(); 2392 // request handled by hci_run() as HANDLE_LINK_KEY_REQUEST gets set 2393 return; 2394 2395 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2396 reverse_bd_addr(&packet[2], addr); 2397 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2398 if (!conn) break; 2399 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2400 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2401 // Change Connection Encryption keeps link key type 2402 if (link_key_type != CHANGED_COMBINATION_KEY){ 2403 conn->link_key_type = link_key_type; 2404 } 2405 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2406 // still forward event to allow dismiss of pairing dialog 2407 break; 2408 } 2409 2410 case HCI_EVENT_PIN_CODE_REQUEST: 2411 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2412 // non-bondable mode: pin code negative reply will be sent 2413 if (!hci_stack->bondable){ 2414 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2415 hci_run(); 2416 return; 2417 } 2418 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2419 if (!hci_stack->link_key_db) break; 2420 hci_event_pin_code_request_get_bd_addr(packet, addr); 2421 hci_stack->link_key_db->delete_link_key(addr); 2422 break; 2423 2424 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2425 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2426 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2427 break; 2428 2429 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2430 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2431 if (!hci_stack->ssp_auto_accept) break; 2432 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2433 break; 2434 2435 case HCI_EVENT_USER_PASSKEY_REQUEST: 2436 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2437 if (!hci_stack->ssp_auto_accept) break; 2438 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2439 break; 2440 case HCI_EVENT_MODE_CHANGE: 2441 handle = hci_event_mode_change_get_handle(packet); 2442 conn = hci_connection_for_handle(handle); 2443 if (!conn) break; 2444 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2445 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2446 break; 2447 #endif 2448 2449 case HCI_EVENT_ENCRYPTION_CHANGE: 2450 handle = hci_event_encryption_change_get_connection_handle(packet); 2451 conn = hci_connection_for_handle(handle); 2452 if (!conn) break; 2453 if (hci_event_encryption_change_get_status(packet) == 0u) { 2454 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2455 if (encryption_enabled){ 2456 if (hci_is_le_connection(conn)){ 2457 // For LE, we accept connection as encrypted 2458 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2459 } 2460 #ifdef ENABLE_CLASSIC 2461 else { 2462 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2463 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2464 bool connected_uses_aes_ccm = encryption_enabled == 2; 2465 if (sc_used_during_pairing && !connected_uses_aes_ccm){ 2466 log_info("SC during pairing, but only E0 now -> abort"); 2467 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2468 break; 2469 } 2470 2471 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2472 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2473 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2474 } else { 2475 // if not, pretend everything is perfect 2476 hci_handle_read_encryption_key_size_complete(conn, 16); 2477 } 2478 } 2479 #endif 2480 } else { 2481 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2482 } 2483 } 2484 2485 break; 2486 2487 #ifdef ENABLE_CLASSIC 2488 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2489 handle = hci_event_authentication_complete_get_connection_handle(packet); 2490 conn = hci_connection_for_handle(handle); 2491 if (!conn) break; 2492 2493 // ignore authentication event if we didn't request it 2494 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2495 2496 // dedicated bonding: send result and disconnect 2497 if (conn->bonding_flags & BONDING_DEDICATED){ 2498 conn->bonding_flags &= ~BONDING_DEDICATED; 2499 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2500 conn->bonding_status = packet[2]; 2501 break; 2502 } 2503 2504 // authenticated only if auth status == 0 2505 if (hci_event_authentication_complete_get_status(packet) == 0){ 2506 // authenticated 2507 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2508 2509 // If link key sufficient for requested security and not already encrypted, start encryption 2510 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2511 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2512 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2513 break; 2514 } 2515 } 2516 2517 // emit updated security level 2518 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2519 break; 2520 #endif 2521 2522 // HCI_EVENT_DISCONNECTION_COMPLETE 2523 // has been split, to first notify stack before shutting connection down 2524 // see end of function, too. 2525 case HCI_EVENT_DISCONNECTION_COMPLETE: 2526 if (packet[2]) break; // status != 0 2527 handle = little_endian_read_16(packet, 3); 2528 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2529 if (hci_stack->acl_fragmentation_total_size > 0u) { 2530 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2531 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2532 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2533 hci_stack->acl_fragmentation_total_size = 0; 2534 hci_stack->acl_fragmentation_pos = 0; 2535 if (release_buffer){ 2536 hci_release_packet_buffer(); 2537 } 2538 } 2539 } 2540 2541 conn = hci_connection_for_handle(handle); 2542 if (!conn) break; 2543 // mark connection for shutdown 2544 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2545 2546 // emit dedicatd bonding event 2547 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2548 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2549 } 2550 2551 #ifdef ENABLE_BLE 2552 #ifdef ENABLE_LE_PERIPHERAL 2553 // re-enable advertisements for le connections if active 2554 if (hci_is_le_connection(conn)){ 2555 hci_reenable_advertisements_if_needed(); 2556 } 2557 #endif 2558 #endif 2559 break; 2560 2561 case HCI_EVENT_HARDWARE_ERROR: 2562 log_error("Hardware Error: 0x%02x", packet[2]); 2563 if (hci_stack->hardware_error_callback){ 2564 (*hci_stack->hardware_error_callback)(packet[2]); 2565 } else { 2566 // if no special requests, just reboot stack 2567 hci_power_control_off(); 2568 hci_power_control_on(); 2569 } 2570 break; 2571 2572 #ifdef ENABLE_CLASSIC 2573 case HCI_EVENT_ROLE_CHANGE: 2574 if (packet[2]) break; // status != 0 2575 reverse_bd_addr(&packet[3], addr); 2576 addr_type = BD_ADDR_TYPE_ACL; 2577 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2578 if (!conn) break; 2579 conn->role = packet[9]; 2580 break; 2581 #endif 2582 2583 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2584 // release packet buffer only for asynchronous transport and if there are not further fragements 2585 if (hci_transport_synchronous()) { 2586 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2587 return; // instead of break: to avoid re-entering hci_run() 2588 } 2589 hci_stack->acl_fragmentation_tx_active = 0; 2590 if (hci_stack->acl_fragmentation_total_size) break; 2591 hci_release_packet_buffer(); 2592 2593 // L2CAP receives this event via the hci_emit_event below 2594 2595 #ifdef ENABLE_CLASSIC 2596 // For SCO, we do the can_send_now_check here 2597 hci_notify_if_sco_can_send_now(); 2598 #endif 2599 break; 2600 2601 #ifdef ENABLE_CLASSIC 2602 case HCI_EVENT_SCO_CAN_SEND_NOW: 2603 // For SCO, we do the can_send_now_check here 2604 hci_stack->sco_can_send_now = 1; 2605 hci_notify_if_sco_can_send_now(); 2606 return; 2607 2608 // explode inquriy results for easier consumption 2609 case HCI_EVENT_INQUIRY_RESULT: 2610 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2611 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2612 gap_inquiry_explode(packet, size); 2613 break; 2614 #endif 2615 2616 #ifdef ENABLE_BLE 2617 case HCI_EVENT_LE_META: 2618 switch (packet[2]){ 2619 #ifdef ENABLE_LE_CENTRAL 2620 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2621 // log_info("advertising report received"); 2622 if (!hci_stack->le_scanning_enabled) break; 2623 le_handle_advertisement_report(packet, size); 2624 break; 2625 #endif 2626 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2627 // Connection management 2628 reverse_bd_addr(&packet[8], addr); 2629 addr_type = (bd_addr_type_t)packet[7]; 2630 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2631 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2632 2633 #ifdef ENABLE_LE_CENTRAL 2634 // if auto-connect, remove from whitelist in both roles 2635 if (hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST){ 2636 hci_remove_from_whitelist(addr_type, addr); 2637 } 2638 // handle error: error is reported only to the initiator -> outgoing connection 2639 if (packet[3]){ 2640 2641 // handle cancelled outgoing connection 2642 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2643 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2644 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2645 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2646 conn = gap_get_outgoing_connection(); 2647 } 2648 2649 // outgoing connection establishment is done 2650 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2651 // remove entry 2652 if (conn){ 2653 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2654 btstack_memory_hci_connection_free( conn ); 2655 } 2656 break; 2657 } 2658 #endif 2659 // on success, both hosts receive connection complete event 2660 if (packet[6] == HCI_ROLE_MASTER){ 2661 #ifdef ENABLE_LE_CENTRAL 2662 // if we're master, it was an outgoing connection and we're done with it 2663 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2664 #endif 2665 } else { 2666 #ifdef ENABLE_LE_PERIPHERAL 2667 // if we're slave, it was an incoming connection, advertisements have stopped 2668 hci_stack->le_advertisements_active = 0; 2669 #endif 2670 } 2671 // LE connections are auto-accepted, so just create a connection if there isn't one already 2672 if (!conn){ 2673 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2674 } 2675 // no memory, sorry. 2676 if (!conn){ 2677 break; 2678 } 2679 2680 conn->state = OPEN; 2681 conn->role = packet[6]; 2682 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2683 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2684 2685 #ifdef ENABLE_LE_PERIPHERAL 2686 if (packet[6] == HCI_ROLE_SLAVE){ 2687 hci_reenable_advertisements_if_needed(); 2688 } 2689 #endif 2690 2691 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2692 2693 // restart timer 2694 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2695 // btstack_run_loop_add_timer(&conn->timeout); 2696 2697 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2698 2699 hci_emit_nr_connections_changed(); 2700 break; 2701 2702 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2703 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2704 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2705 conn = hci_connection_for_handle(handle); 2706 if (!conn) break; 2707 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2708 break; 2709 2710 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2711 // connection 2712 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2713 conn = hci_connection_for_handle(handle); 2714 if (conn) { 2715 // read arguments 2716 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2717 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2718 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2719 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2720 2721 // validate against current connection parameter range 2722 le_connection_parameter_range_t existing_range; 2723 gap_get_connection_parameter_range(&existing_range); 2724 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2725 if (update_parameter){ 2726 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2727 conn->le_conn_interval_min = le_conn_interval_min; 2728 conn->le_conn_interval_max = le_conn_interval_max; 2729 conn->le_conn_latency = le_conn_latency; 2730 conn->le_supervision_timeout = le_supervision_timeout; 2731 } else { 2732 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_DENY; 2733 } 2734 } 2735 break; 2736 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2737 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2738 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2739 conn = hci_connection_for_handle(handle); 2740 if (conn) { 2741 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2742 } 2743 break; 2744 #endif 2745 default: 2746 break; 2747 } 2748 break; 2749 #endif 2750 case HCI_EVENT_VENDOR_SPECIFIC: 2751 // Vendor specific commands often create vendor specific event instead of num completed packets 2752 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2753 switch (hci_stack->manufacturer){ 2754 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2755 hci_stack->num_cmd_packets = 1; 2756 break; 2757 default: 2758 break; 2759 } 2760 break; 2761 default: 2762 break; 2763 } 2764 2765 handle_event_for_current_stack_state(packet, size); 2766 2767 // notify upper stack 2768 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2769 2770 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2771 if (hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE){ 2772 if (!packet[2]){ 2773 handle = little_endian_read_16(packet, 3); 2774 hci_connection_t * aConn = hci_connection_for_handle(handle); 2775 if (aConn) { 2776 // discard connection if app did not trigger a reconnect in the event handler 2777 if (aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2778 hci_shutdown_connection(aConn); 2779 } 2780 } 2781 } 2782 } 2783 2784 // execute main loop 2785 hci_run(); 2786 } 2787 2788 #ifdef ENABLE_CLASSIC 2789 2790 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2791 static void sco_schedule_tx(hci_connection_t * conn); 2792 2793 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2794 log_debug("SCO TX Timeout"); 2795 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2796 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2797 if (!conn) return; 2798 2799 // trigger send 2800 conn->sco_tx_ready = 1; 2801 // extra packet if CVSD but SCO buffer is too short 2802 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2803 conn->sco_tx_ready++; 2804 } 2805 hci_notify_if_sco_can_send_now(); 2806 } 2807 2808 2809 #define SCO_TX_AFTER_RX_MS (6) 2810 2811 static void sco_schedule_tx(hci_connection_t * conn){ 2812 2813 uint32_t now = btstack_run_loop_get_time_ms(); 2814 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2815 int time_delta_ms = sco_tx_ms - now; 2816 2817 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2818 2819 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2820 btstack_run_loop_set_timer(timer, time_delta_ms); 2821 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2822 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2823 btstack_run_loop_add_timer(timer); 2824 } 2825 2826 static void sco_handler(uint8_t * packet, uint16_t size){ 2827 // lookup connection struct 2828 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2829 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2830 if (!conn) return; 2831 2832 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2833 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2834 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2835 packet[2] = 0x3c; 2836 memmove(&packet[3], &packet[23], 63); 2837 size = 63; 2838 } 2839 } 2840 2841 if (hci_have_usb_transport()){ 2842 // Nothing to do 2843 } else { 2844 // 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); 2845 if (hci_stack->synchronous_flow_control_enabled == 0){ 2846 uint32_t now = btstack_run_loop_get_time_ms(); 2847 2848 if (!conn->sco_rx_valid){ 2849 // ignore first 10 packets 2850 conn->sco_rx_count++; 2851 // log_debug("sco rx count %u", conn->sco_rx_count); 2852 if (conn->sco_rx_count == 10) { 2853 // use first timestamp as is and pretent it just started 2854 conn->sco_rx_ms = now; 2855 conn->sco_rx_valid = 1; 2856 conn->sco_rx_count = 0; 2857 sco_schedule_tx(conn); 2858 } 2859 } else { 2860 // track expected arrival timme 2861 conn->sco_rx_count++; 2862 conn->sco_rx_ms += 7; 2863 int delta = (int32_t) (now - conn->sco_rx_ms); 2864 if (delta > 0){ 2865 conn->sco_rx_ms++; 2866 } 2867 // log_debug("sco rx %u", conn->sco_rx_ms); 2868 sco_schedule_tx(conn); 2869 } 2870 } 2871 } 2872 // deliver to app 2873 if (hci_stack->sco_packet_handler) { 2874 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2875 } 2876 2877 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2878 conn->num_packets_completed++; 2879 hci_stack->host_completed_packets = 1; 2880 hci_run(); 2881 #endif 2882 } 2883 #endif 2884 2885 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2886 hci_dump_packet(packet_type, 1, packet, size); 2887 switch (packet_type) { 2888 case HCI_EVENT_PACKET: 2889 event_handler(packet, size); 2890 break; 2891 case HCI_ACL_DATA_PACKET: 2892 acl_handler(packet, size); 2893 break; 2894 #ifdef ENABLE_CLASSIC 2895 case HCI_SCO_DATA_PACKET: 2896 sco_handler(packet, size); 2897 break; 2898 #endif 2899 default: 2900 break; 2901 } 2902 } 2903 2904 /** 2905 * @brief Add event packet handler. 2906 */ 2907 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2908 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2909 } 2910 2911 2912 /** Register HCI packet handlers */ 2913 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 2914 hci_stack->acl_packet_handler = handler; 2915 } 2916 2917 #ifdef ENABLE_CLASSIC 2918 /** 2919 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 2920 */ 2921 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 2922 hci_stack->sco_packet_handler = handler; 2923 } 2924 #endif 2925 2926 static void hci_state_reset(void){ 2927 // no connections yet 2928 hci_stack->connections = NULL; 2929 2930 // keep discoverable/connectable as this has been requested by the client(s) 2931 // hci_stack->discoverable = 0; 2932 // hci_stack->connectable = 0; 2933 // hci_stack->bondable = 1; 2934 // hci_stack->own_addr_type = 0; 2935 2936 // buffer is free 2937 hci_stack->hci_packet_buffer_reserved = 0; 2938 2939 // no pending cmds 2940 hci_stack->decline_reason = 0; 2941 hci_stack->new_scan_enable_value = 0xff; 2942 2943 // LE 2944 #ifdef ENABLE_BLE 2945 memset(hci_stack->le_random_address, 0, 6); 2946 hci_stack->le_random_address_set = 0; 2947 #endif 2948 #ifdef ENABLE_LE_CENTRAL 2949 hci_stack->le_scanning_active = 0; 2950 hci_stack->le_scan_type = 0xff; 2951 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2952 hci_stack->le_whitelist = 0; 2953 hci_stack->le_whitelist_capacity = 0; 2954 #endif 2955 } 2956 2957 #ifdef ENABLE_CLASSIC 2958 /** 2959 * @brief Configure Bluetooth hardware control. Has to be called before power on. 2960 */ 2961 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 2962 // store and open remote device db 2963 hci_stack->link_key_db = link_key_db; 2964 if (hci_stack->link_key_db) { 2965 hci_stack->link_key_db->open(); 2966 } 2967 } 2968 #endif 2969 2970 void hci_init(const hci_transport_t *transport, const void *config){ 2971 2972 #ifdef HAVE_MALLOC 2973 if (!hci_stack) { 2974 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 2975 } 2976 #else 2977 hci_stack = &hci_stack_static; 2978 #endif 2979 memset(hci_stack, 0, sizeof(hci_stack_t)); 2980 2981 // reference to use transport layer implementation 2982 hci_stack->hci_transport = transport; 2983 2984 // reference to used config 2985 hci_stack->config = config; 2986 2987 // setup pointer for outgoing packet buffer 2988 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 2989 2990 // max acl payload size defined in config.h 2991 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 2992 2993 // register packet handlers with transport 2994 transport->register_packet_handler(&packet_handler); 2995 2996 hci_stack->state = HCI_STATE_OFF; 2997 2998 // class of device 2999 hci_stack->class_of_device = 0x007a020c; // Smartphone 3000 3001 // bondable by default 3002 hci_stack->bondable = 1; 3003 3004 #ifdef ENABLE_CLASSIC 3005 // classic name 3006 hci_stack->local_name = default_classic_name; 3007 3008 // Master slave policy 3009 hci_stack->master_slave_policy = 1; 3010 3011 // Allow Role Switch 3012 hci_stack->allow_role_switch = 1; 3013 3014 // Default / minimum security level = 2 3015 hci_stack->gap_security_level = LEVEL_2; 3016 3017 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3018 hci_stack->gap_required_encyrption_key_size = 7; 3019 #endif 3020 3021 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3022 hci_stack->ssp_enable = 1; 3023 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3024 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3025 hci_stack->ssp_auto_accept = 1; 3026 3027 // Secure Connections: enable (requires support from Controller) 3028 hci_stack->secure_connections_enable = true; 3029 3030 // voice setting - signed 16 bit pcm data with CVSD over the air 3031 hci_stack->sco_voice_setting = 0x60; 3032 3033 #ifdef ENABLE_LE_CENTRAL 3034 // connection parameter to use for outgoing connections 3035 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3036 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3037 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3038 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3039 hci_stack->le_connection_latency = 4; // 4 3040 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3041 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3042 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3043 3044 // default LE Scanning 3045 hci_stack->le_scan_interval = 0x1e0; 3046 hci_stack->le_scan_window = 0x30; 3047 #endif 3048 3049 #ifdef ENABLE_LE_PERIPHERAL 3050 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3051 #endif 3052 3053 // connection parameter range used to answer connection parameter update requests in l2cap 3054 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3055 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3056 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3057 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3058 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3059 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3060 3061 hci_state_reset(); 3062 } 3063 3064 /** 3065 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3066 */ 3067 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3068 hci_stack->chipset = chipset_driver; 3069 3070 // reset chipset driver - init is also called on power_up 3071 if (hci_stack->chipset && hci_stack->chipset->init){ 3072 hci_stack->chipset->init(hci_stack->config); 3073 } 3074 } 3075 3076 /** 3077 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3078 */ 3079 void hci_set_control(const btstack_control_t *hardware_control){ 3080 // references to used control implementation 3081 hci_stack->control = hardware_control; 3082 // init with transport config 3083 hardware_control->init(hci_stack->config); 3084 } 3085 3086 void hci_close(void){ 3087 // close remote device db 3088 if (hci_stack->link_key_db) { 3089 hci_stack->link_key_db->close(); 3090 } 3091 3092 btstack_linked_list_iterator_t lit; 3093 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3094 while (btstack_linked_list_iterator_has_next(&lit)){ 3095 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3096 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3097 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3098 hci_shutdown_connection(connection); 3099 } 3100 3101 hci_power_control(HCI_POWER_OFF); 3102 3103 #ifdef HAVE_MALLOC 3104 free(hci_stack); 3105 #endif 3106 hci_stack = NULL; 3107 } 3108 3109 #ifdef ENABLE_CLASSIC 3110 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3111 // validate ranage and set 3112 if (encryption_key_size < 7) return; 3113 if (encryption_key_size > 16) return; 3114 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3115 } 3116 3117 void gap_set_security_level(gap_security_level_t security_level){ 3118 hci_stack->gap_security_level = security_level; 3119 } 3120 3121 gap_security_level_t gap_get_security_level(void){ 3122 return hci_stack->gap_security_level; 3123 } 3124 #endif 3125 3126 #ifdef ENABLE_CLASSIC 3127 void gap_set_class_of_device(uint32_t class_of_device){ 3128 hci_stack->class_of_device = class_of_device; 3129 } 3130 3131 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3132 hci_stack->default_link_policy_settings = default_link_policy_settings; 3133 } 3134 3135 void gap_set_allow_role_switch(bool allow_role_switch){ 3136 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3137 } 3138 3139 uint8_t hci_get_allow_role_switch(void){ 3140 return hci_stack->allow_role_switch; 3141 } 3142 3143 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3144 hci_stack->link_supervision_timeout = link_supervision_timeout; 3145 } 3146 3147 void hci_disable_l2cap_timeout_check(void){ 3148 disable_l2cap_timeouts = 1; 3149 } 3150 #endif 3151 3152 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3153 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3154 void hci_set_bd_addr(bd_addr_t addr){ 3155 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3156 hci_stack->custom_bd_addr_set = 1; 3157 } 3158 #endif 3159 3160 // State-Module-Driver overview 3161 // state module low-level 3162 // HCI_STATE_OFF off close 3163 // HCI_STATE_INITIALIZING, on open 3164 // HCI_STATE_WORKING, on open 3165 // HCI_STATE_HALTING, on open 3166 // HCI_STATE_SLEEPING, off/sleep close 3167 // HCI_STATE_FALLING_ASLEEP on open 3168 3169 static int hci_power_control_on(void){ 3170 3171 // power on 3172 int err = 0; 3173 if (hci_stack->control && hci_stack->control->on){ 3174 err = (*hci_stack->control->on)(); 3175 } 3176 if (err){ 3177 log_error( "POWER_ON failed"); 3178 hci_emit_hci_open_failed(); 3179 return err; 3180 } 3181 3182 // int chipset driver 3183 if (hci_stack->chipset && hci_stack->chipset->init){ 3184 hci_stack->chipset->init(hci_stack->config); 3185 } 3186 3187 // init transport 3188 if (hci_stack->hci_transport->init){ 3189 hci_stack->hci_transport->init(hci_stack->config); 3190 } 3191 3192 // open transport 3193 err = hci_stack->hci_transport->open(); 3194 if (err){ 3195 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3196 if (hci_stack->control && hci_stack->control->off){ 3197 (*hci_stack->control->off)(); 3198 } 3199 hci_emit_hci_open_failed(); 3200 return err; 3201 } 3202 return 0; 3203 } 3204 3205 static void hci_power_control_off(void){ 3206 3207 log_info("hci_power_control_off"); 3208 3209 // close low-level device 3210 hci_stack->hci_transport->close(); 3211 3212 log_info("hci_power_control_off - hci_transport closed"); 3213 3214 // power off 3215 if (hci_stack->control && hci_stack->control->off){ 3216 (*hci_stack->control->off)(); 3217 } 3218 3219 log_info("hci_power_control_off - control closed"); 3220 3221 hci_stack->state = HCI_STATE_OFF; 3222 } 3223 3224 static void hci_power_control_sleep(void){ 3225 3226 log_info("hci_power_control_sleep"); 3227 3228 #if 0 3229 // don't close serial port during sleep 3230 3231 // close low-level device 3232 hci_stack->hci_transport->close(hci_stack->config); 3233 #endif 3234 3235 // sleep mode 3236 if (hci_stack->control && hci_stack->control->sleep){ 3237 (*hci_stack->control->sleep)(); 3238 } 3239 3240 hci_stack->state = HCI_STATE_SLEEPING; 3241 } 3242 3243 static int hci_power_control_wake(void){ 3244 3245 log_info("hci_power_control_wake"); 3246 3247 // wake on 3248 if (hci_stack->control && hci_stack->control->wake){ 3249 (*hci_stack->control->wake)(); 3250 } 3251 3252 #if 0 3253 // open low-level device 3254 int err = hci_stack->hci_transport->open(hci_stack->config); 3255 if (err){ 3256 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3257 if (hci_stack->control && hci_stack->control->off){ 3258 (*hci_stack->control->off)(); 3259 } 3260 hci_emit_hci_open_failed(); 3261 return err; 3262 } 3263 #endif 3264 3265 return 0; 3266 } 3267 3268 static void hci_power_transition_to_initializing(void){ 3269 // set up state machine 3270 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3271 hci_stack->hci_packet_buffer_reserved = 0; 3272 hci_stack->state = HCI_STATE_INITIALIZING; 3273 hci_stack->substate = HCI_INIT_SEND_RESET; 3274 } 3275 3276 int hci_power_control(HCI_POWER_MODE power_mode){ 3277 3278 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3279 3280 int err = 0; 3281 switch (hci_stack->state){ 3282 3283 case HCI_STATE_OFF: 3284 switch (power_mode){ 3285 case HCI_POWER_ON: 3286 err = hci_power_control_on(); 3287 if (err) { 3288 log_error("hci_power_control_on() error %d", err); 3289 return err; 3290 } 3291 hci_power_transition_to_initializing(); 3292 break; 3293 case HCI_POWER_OFF: 3294 // do nothing 3295 break; 3296 case HCI_POWER_SLEEP: 3297 // do nothing (with SLEEP == OFF) 3298 break; 3299 } 3300 break; 3301 3302 case HCI_STATE_INITIALIZING: 3303 switch (power_mode){ 3304 case HCI_POWER_ON: 3305 // do nothing 3306 break; 3307 case HCI_POWER_OFF: 3308 // no connections yet, just turn it off 3309 hci_power_control_off(); 3310 break; 3311 case HCI_POWER_SLEEP: 3312 // no connections yet, just turn it off 3313 hci_power_control_sleep(); 3314 break; 3315 } 3316 break; 3317 3318 case HCI_STATE_WORKING: 3319 switch (power_mode){ 3320 case HCI_POWER_ON: 3321 // do nothing 3322 break; 3323 case HCI_POWER_OFF: 3324 // see hci_run 3325 hci_stack->state = HCI_STATE_HALTING; 3326 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3327 break; 3328 case HCI_POWER_SLEEP: 3329 // see hci_run 3330 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3331 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3332 break; 3333 } 3334 break; 3335 3336 case HCI_STATE_HALTING: 3337 switch (power_mode){ 3338 case HCI_POWER_ON: 3339 hci_power_transition_to_initializing(); 3340 break; 3341 case HCI_POWER_OFF: 3342 // do nothing 3343 break; 3344 case HCI_POWER_SLEEP: 3345 // see hci_run 3346 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3347 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3348 break; 3349 } 3350 break; 3351 3352 case HCI_STATE_FALLING_ASLEEP: 3353 switch (power_mode){ 3354 case HCI_POWER_ON: 3355 3356 #ifdef HAVE_PLATFORM_IPHONE_OS 3357 // nothing to do, if H4 supports power management 3358 if (btstack_control_iphone_power_management_enabled()){ 3359 hci_stack->state = HCI_STATE_INITIALIZING; 3360 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3361 break; 3362 } 3363 #endif 3364 hci_power_transition_to_initializing(); 3365 break; 3366 case HCI_POWER_OFF: 3367 // see hci_run 3368 hci_stack->state = HCI_STATE_HALTING; 3369 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3370 break; 3371 case HCI_POWER_SLEEP: 3372 // do nothing 3373 break; 3374 } 3375 break; 3376 3377 case HCI_STATE_SLEEPING: 3378 switch (power_mode){ 3379 case HCI_POWER_ON: 3380 3381 #ifdef HAVE_PLATFORM_IPHONE_OS 3382 // nothing to do, if H4 supports power management 3383 if (btstack_control_iphone_power_management_enabled()){ 3384 hci_stack->state = HCI_STATE_INITIALIZING; 3385 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3386 hci_update_scan_enable(); 3387 break; 3388 } 3389 #endif 3390 err = hci_power_control_wake(); 3391 if (err) return err; 3392 hci_power_transition_to_initializing(); 3393 break; 3394 case HCI_POWER_OFF: 3395 hci_stack->state = HCI_STATE_HALTING; 3396 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3397 break; 3398 case HCI_POWER_SLEEP: 3399 // do nothing 3400 break; 3401 } 3402 break; 3403 } 3404 3405 // create internal event 3406 hci_emit_state(); 3407 3408 // trigger next/first action 3409 hci_run(); 3410 3411 return 0; 3412 } 3413 3414 3415 #ifdef ENABLE_CLASSIC 3416 3417 static void hci_update_scan_enable(void){ 3418 // 2 = page scan, 1 = inq scan 3419 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3420 hci_run(); 3421 } 3422 3423 void gap_discoverable_control(uint8_t enable){ 3424 if (enable) enable = 1; // normalize argument 3425 3426 if (hci_stack->discoverable == enable){ 3427 hci_emit_discoverable_enabled(hci_stack->discoverable); 3428 return; 3429 } 3430 3431 hci_stack->discoverable = enable; 3432 hci_update_scan_enable(); 3433 } 3434 3435 void gap_connectable_control(uint8_t enable){ 3436 if (enable) enable = 1; // normalize argument 3437 3438 // don't emit event 3439 if (hci_stack->connectable == enable) return; 3440 3441 hci_stack->connectable = enable; 3442 hci_update_scan_enable(); 3443 } 3444 #endif 3445 3446 void gap_local_bd_addr(bd_addr_t address_buffer){ 3447 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3448 } 3449 3450 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3451 static void hci_host_num_completed_packets(void){ 3452 3453 // create packet manually as arrays are not supported and num_commands should not get reduced 3454 hci_reserve_packet_buffer(); 3455 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3456 3457 uint16_t size = 0; 3458 uint16_t num_handles = 0; 3459 packet[size++] = 0x35; 3460 packet[size++] = 0x0c; 3461 size++; // skip param len 3462 size++; // skip num handles 3463 3464 // add { handle, packets } entries 3465 btstack_linked_item_t * it; 3466 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3467 hci_connection_t * connection = (hci_connection_t *) it; 3468 if (connection->num_packets_completed){ 3469 little_endian_store_16(packet, size, connection->con_handle); 3470 size += 2; 3471 little_endian_store_16(packet, size, connection->num_packets_completed); 3472 size += 2; 3473 // 3474 num_handles++; 3475 connection->num_packets_completed = 0; 3476 } 3477 } 3478 3479 packet[2] = size - 3; 3480 packet[3] = num_handles; 3481 3482 hci_stack->host_completed_packets = 0; 3483 3484 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3485 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3486 3487 // release packet buffer for synchronous transport implementations 3488 if (hci_transport_synchronous()){ 3489 hci_release_packet_buffer(); 3490 hci_emit_transport_packet_sent(); 3491 } 3492 } 3493 #endif 3494 3495 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3496 UNUSED(ds); 3497 hci_stack->substate = HCI_HALTING_CLOSE; 3498 // allow packet handlers to defer final shutdown 3499 hci_emit_state(); 3500 hci_run(); 3501 } 3502 3503 static bool hci_run_acl_fragments(void){ 3504 if (hci_stack->acl_fragmentation_total_size > 0u) { 3505 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3506 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3507 if (connection) { 3508 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3509 hci_send_acl_packet_fragments(connection); 3510 return true; 3511 } 3512 } else { 3513 // connection gone -> discard further fragments 3514 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3515 hci_stack->acl_fragmentation_total_size = 0; 3516 hci_stack->acl_fragmentation_pos = 0; 3517 } 3518 } 3519 return false; 3520 } 3521 3522 #ifdef ENABLE_CLASSIC 3523 static bool hci_run_general_gap_classic(void){ 3524 3525 // decline incoming connections 3526 if (hci_stack->decline_reason){ 3527 uint8_t reason = hci_stack->decline_reason; 3528 hci_stack->decline_reason = 0; 3529 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3530 return true; 3531 } 3532 // send scan enable 3533 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3534 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3535 hci_stack->new_scan_enable_value = 0xff; 3536 return true; 3537 } 3538 // start/stop inquiry 3539 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3540 uint8_t duration = hci_stack->inquiry_state; 3541 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3542 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3543 return true; 3544 } 3545 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3546 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3547 hci_send_cmd(&hci_inquiry_cancel); 3548 return true; 3549 } 3550 // remote name request 3551 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3552 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3553 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3554 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3555 return true; 3556 } 3557 // pairing 3558 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3559 uint8_t state = hci_stack->gap_pairing_state; 3560 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3561 switch (state){ 3562 case GAP_PAIRING_STATE_SEND_PIN: 3563 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); 3564 break; 3565 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3566 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3567 break; 3568 case GAP_PAIRING_STATE_SEND_PASSKEY: 3569 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3570 break; 3571 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3572 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3573 break; 3574 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3575 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3576 break; 3577 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3578 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3579 break; 3580 default: 3581 break; 3582 } 3583 return true; 3584 } 3585 return false; 3586 } 3587 #endif 3588 3589 #ifdef ENABLE_BLE 3590 static bool hci_run_general_gap_le(void){ 3591 3592 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3593 3594 if (hci_stack->state != HCI_STATE_WORKING) return false; 3595 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3596 3597 #ifdef ENABLE_LE_CENTRAL 3598 // parameter change requires scanning to be stopped first 3599 if (hci_stack->le_scan_type != 0xffu) { 3600 if (hci_stack->le_scanning_active){ 3601 hci_stack->le_scanning_active = 0; 3602 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3603 } else { 3604 int scan_type = (int) hci_stack->le_scan_type; 3605 hci_stack->le_scan_type = 0xff; 3606 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); 3607 } 3608 return true; 3609 } 3610 // finally, we can enable/disable le scan 3611 if ((hci_stack->le_scanning_enabled != hci_stack->le_scanning_active)){ 3612 hci_stack->le_scanning_active = hci_stack->le_scanning_enabled; 3613 hci_send_cmd(&hci_le_set_scan_enable, hci_stack->le_scanning_enabled, 0); 3614 return true; 3615 } 3616 #endif 3617 #ifdef ENABLE_LE_PERIPHERAL 3618 // le advertisement control 3619 if (hci_stack->le_advertisements_todo){ 3620 log_info("hci_run: gap_le: adv todo: %x", hci_stack->le_advertisements_todo ); 3621 } 3622 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_DISABLE){ 3623 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_DISABLE; 3624 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3625 return true; 3626 } 3627 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3628 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3629 hci_send_cmd(&hci_le_set_advertising_parameters, 3630 hci_stack->le_advertisements_interval_min, 3631 hci_stack->le_advertisements_interval_max, 3632 hci_stack->le_advertisements_type, 3633 hci_stack->le_own_addr_type, 3634 hci_stack->le_advertisements_direct_address_type, 3635 hci_stack->le_advertisements_direct_address, 3636 hci_stack->le_advertisements_channel_map, 3637 hci_stack->le_advertisements_filter_policy); 3638 return true; 3639 } 3640 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3641 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3642 uint8_t adv_data_clean[31]; 3643 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3644 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3645 hci_stack->le_advertisements_data_len); 3646 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3647 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3648 return true; 3649 } 3650 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3651 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3652 uint8_t scan_data_clean[31]; 3653 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3654 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3655 hci_stack->le_scan_response_data_len); 3656 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3657 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3658 return true; 3659 } 3660 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_ENABLE){ 3661 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_ENABLE; 3662 hci_send_cmd(&hci_le_set_advertise_enable, 1); 3663 return true; 3664 } 3665 #endif 3666 3667 #ifdef ENABLE_LE_CENTRAL 3668 // 3669 // LE Whitelist Management 3670 // 3671 3672 // check if whitelist needs modification 3673 btstack_linked_list_iterator_t lit; 3674 int modification_pending = 0; 3675 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3676 while (btstack_linked_list_iterator_has_next(&lit)){ 3677 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3678 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3679 modification_pending = 1; 3680 break; 3681 } 3682 } 3683 3684 if (modification_pending){ 3685 // stop connnecting if modification pending 3686 if (hci_stack->le_connecting_state != LE_CONNECTING_IDLE){ 3687 hci_send_cmd(&hci_le_create_connection_cancel); 3688 return true; 3689 } 3690 3691 // add/remove entries 3692 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3693 while (btstack_linked_list_iterator_has_next(&lit)){ 3694 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3695 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3696 entry->state = LE_WHITELIST_ON_CONTROLLER; 3697 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3698 return true; 3699 } 3700 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3701 bd_addr_t address; 3702 bd_addr_type_t address_type = entry->address_type; 3703 (void)memcpy(address, entry->address, 6); 3704 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3705 btstack_memory_whitelist_entry_free(entry); 3706 hci_send_cmd(&hci_le_remove_device_from_white_list, address_type, address); 3707 return true; 3708 } 3709 } 3710 } 3711 3712 // start connecting 3713 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && 3714 !btstack_linked_list_empty(&hci_stack->le_whitelist)){ 3715 bd_addr_t null_addr; 3716 memset(null_addr, 0, 6); 3717 hci_send_cmd(&hci_le_create_connection, 3718 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 3719 hci_stack->le_connection_scan_window, // scan interval: 30 ms 3720 1, // use whitelist 3721 0, // peer address type 3722 null_addr, // peer bd addr 3723 hci_stack->le_own_addr_type, // our addr type: 3724 hci_stack->le_connection_interval_min, // conn interval min 3725 hci_stack->le_connection_interval_max, // conn interval max 3726 hci_stack->le_connection_latency, // conn latency 3727 hci_stack->le_supervision_timeout, // conn latency 3728 hci_stack->le_minimum_ce_length, // min ce length 3729 hci_stack->le_maximum_ce_length // max ce length 3730 ); 3731 return true; 3732 } 3733 #endif 3734 return false; 3735 } 3736 #endif 3737 3738 static bool hci_run_general_pending_commmands(void){ 3739 btstack_linked_item_t * it; 3740 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 3741 hci_connection_t * connection = (hci_connection_t *) it; 3742 3743 switch(connection->state){ 3744 case SEND_CREATE_CONNECTION: 3745 switch(connection->address_type){ 3746 #ifdef ENABLE_CLASSIC 3747 case BD_ADDR_TYPE_ACL: 3748 log_info("sending hci_create_connection"); 3749 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 3750 break; 3751 #endif 3752 default: 3753 #ifdef ENABLE_BLE 3754 #ifdef ENABLE_LE_CENTRAL 3755 // track outgoing connection 3756 hci_stack->outgoing_addr_type = connection->address_type; 3757 (void)memcpy(hci_stack->outgoing_addr, 3758 connection->address, 6); 3759 log_info("sending hci_le_create_connection"); 3760 hci_send_cmd(&hci_le_create_connection, 3761 hci_stack->le_connection_scan_interval, // conn scan interval 3762 hci_stack->le_connection_scan_window, // conn scan windows 3763 0, // don't use whitelist 3764 connection->address_type, // peer address type 3765 connection->address, // peer bd addr 3766 hci_stack->le_own_addr_type, // our addr type: 3767 hci_stack->le_connection_interval_min, // conn interval min 3768 hci_stack->le_connection_interval_max, // conn interval max 3769 hci_stack->le_connection_latency, // conn latency 3770 hci_stack->le_supervision_timeout, // conn latency 3771 hci_stack->le_minimum_ce_length, // min ce length 3772 hci_stack->le_maximum_ce_length // max ce length 3773 ); 3774 connection->state = SENT_CREATE_CONNECTION; 3775 #endif 3776 #endif 3777 break; 3778 } 3779 return true; 3780 3781 #ifdef ENABLE_CLASSIC 3782 case RECEIVED_CONNECTION_REQUEST: 3783 connection->role = HCI_ROLE_SLAVE; 3784 if (connection->address_type == BD_ADDR_TYPE_ACL){ 3785 log_info("sending hci_accept_connection_request"); 3786 connection->state = ACCEPTED_CONNECTION_REQUEST; 3787 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 3788 } 3789 return true; 3790 #endif 3791 3792 #ifdef ENABLE_BLE 3793 #ifdef ENABLE_LE_CENTRAL 3794 case SEND_CANCEL_CONNECTION: 3795 connection->state = SENT_CANCEL_CONNECTION; 3796 hci_send_cmd(&hci_le_create_connection_cancel); 3797 return true; 3798 #endif 3799 #endif 3800 case SEND_DISCONNECT: 3801 connection->state = SENT_DISCONNECT; 3802 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3803 return true; 3804 3805 default: 3806 break; 3807 } 3808 3809 // no further commands if connection is about to get shut down 3810 if (connection->state == SENT_DISCONNECT) continue; 3811 3812 if (connection->authentication_flags & READ_RSSI){ 3813 connectionClearAuthenticationFlags(connection, READ_RSSI); 3814 hci_send_cmd(&hci_read_rssi, connection->con_handle); 3815 return true; 3816 } 3817 3818 #ifdef ENABLE_CLASSIC 3819 3820 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 3821 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 3822 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 3823 return true; 3824 } 3825 3826 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 3827 log_info("responding to link key request"); 3828 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 3829 3830 link_key_t link_key; 3831 link_key_type_t link_key_type; 3832 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 3833 3834 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3835 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 3836 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 3837 if (sc_downgrade){ 3838 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 3839 connection->state = SENT_DISCONNECT; 3840 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3841 return true; 3842 } 3843 3844 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 3845 if (have_link_key && security_level_sufficient){ 3846 connection->link_key_type = link_key_type; 3847 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 3848 } else { 3849 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 3850 } 3851 return true; 3852 } 3853 3854 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 3855 log_info("denying to pin request"); 3856 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 3857 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 3858 return true; 3859 } 3860 3861 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 3862 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 3863 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 3864 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 3865 // tweak authentication requirements 3866 uint8_t authreq = hci_stack->ssp_authentication_requirement; 3867 if (connection->bonding_flags & BONDING_DEDICATED){ 3868 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3869 } 3870 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 3871 authreq |= 1; 3872 } 3873 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, NULL, authreq); 3874 } else { 3875 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 3876 } 3877 return true; 3878 } 3879 3880 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 3881 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 3882 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 3883 return true; 3884 } 3885 3886 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 3887 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 3888 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 3889 return true; 3890 } 3891 3892 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 3893 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 3894 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 3895 return true; 3896 } 3897 3898 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 3899 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3900 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 3901 return true; 3902 } 3903 3904 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 3905 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3906 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 3907 return true; 3908 } 3909 3910 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 3911 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 3912 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 3913 connection->state = SENT_DISCONNECT; 3914 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3915 return true; 3916 } 3917 3918 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 3919 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 3920 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 3921 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 3922 return true; 3923 } 3924 3925 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 3926 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 3927 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 3928 return true; 3929 } 3930 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 3931 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3932 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 3933 return true; 3934 } 3935 #endif 3936 3937 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 3938 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 3939 if (connection->state != SENT_DISCONNECT){ 3940 connection->state = SENT_DISCONNECT; 3941 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 3942 return true; 3943 } 3944 } 3945 3946 #ifdef ENABLE_CLASSIC 3947 uint16_t sniff_min_interval; 3948 switch (connection->sniff_min_interval){ 3949 case 0: 3950 break; 3951 case 0xffff: 3952 connection->sniff_min_interval = 0; 3953 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 3954 return true; 3955 default: 3956 sniff_min_interval = connection->sniff_min_interval; 3957 connection->sniff_min_interval = 0; 3958 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 3959 return true; 3960 } 3961 #endif 3962 3963 #ifdef ENABLE_BLE 3964 switch (connection->le_con_parameter_update_state){ 3965 // response to L2CAP CON PARAMETER UPDATE REQUEST 3966 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 3967 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3968 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 3969 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3970 0x0000, 0xffff); 3971 return true; 3972 case CON_PARAMETER_UPDATE_REPLY: 3973 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3974 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 3975 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 3976 0x0000, 0xffff); 3977 return true; 3978 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 3979 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 3980 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 3981 return true; 3982 default: 3983 break; 3984 } 3985 if (connection->le_phy_update_all_phys != 0xffu){ 3986 uint8_t all_phys = connection->le_phy_update_all_phys; 3987 connection->le_phy_update_all_phys = 0xff; 3988 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); 3989 return true; 3990 } 3991 #endif 3992 } 3993 return false; 3994 } 3995 3996 static void hci_run(void){ 3997 3998 bool done; 3999 4000 // send continuation fragments first, as they block the prepared packet buffer 4001 done = hci_run_acl_fragments(); 4002 if (done) return; 4003 4004 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4005 // send host num completed packets next as they don't require num_cmd_packets > 0 4006 if (!hci_can_send_comand_packet_transport()) return; 4007 if (hci_stack->host_completed_packets){ 4008 hci_host_num_completed_packets(); 4009 return; 4010 } 4011 #endif 4012 4013 if (!hci_can_send_command_packet_now()) return; 4014 4015 // global/non-connection oriented commands 4016 4017 4018 #ifdef ENABLE_CLASSIC 4019 // general gap classic 4020 done = hci_run_general_gap_classic(); 4021 if (done) return; 4022 #endif 4023 4024 #ifdef ENABLE_BLE 4025 // general gap le 4026 done = hci_run_general_gap_le(); 4027 if (done) return; 4028 #endif 4029 4030 // send pending HCI commands 4031 done = hci_run_general_pending_commmands(); 4032 if (done) return; 4033 4034 // stack state sub statemachines 4035 hci_connection_t * connection; 4036 switch (hci_stack->state){ 4037 case HCI_STATE_INITIALIZING: 4038 hci_initializing_run(); 4039 break; 4040 4041 case HCI_STATE_HALTING: 4042 4043 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4044 switch (hci_stack->substate){ 4045 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4046 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4047 4048 #ifdef ENABLE_BLE 4049 #ifdef ENABLE_LE_CENTRAL 4050 // free whitelist entries 4051 { 4052 btstack_linked_list_iterator_t lit; 4053 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4054 while (btstack_linked_list_iterator_has_next(&lit)){ 4055 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4056 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4057 btstack_memory_whitelist_entry_free(entry); 4058 } 4059 } 4060 #endif 4061 #endif 4062 // close all open connections 4063 connection = (hci_connection_t *) hci_stack->connections; 4064 if (connection){ 4065 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4066 if (!hci_can_send_command_packet_now()) return; 4067 4068 // check state 4069 if (connection->state == SENT_DISCONNECT) return; 4070 connection->state = SENT_DISCONNECT; 4071 4072 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4073 4074 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4075 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4076 4077 // ... which would be ignored anyway as we shutdown (free) the connection now 4078 hci_shutdown_connection(connection); 4079 4080 // finally, send the disconnect command 4081 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4082 return; 4083 } 4084 4085 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4086 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4087 log_info("HCI_STATE_HALTING: wait 50 ms"); 4088 hci_stack->substate = HCI_HALTING_W4_TIMER; 4089 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4090 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4091 btstack_run_loop_add_timer(&hci_stack->timeout); 4092 break; 4093 } 4094 4095 /* fall through */ 4096 4097 case HCI_HALTING_CLOSE: 4098 log_info("HCI_STATE_HALTING, calling off"); 4099 4100 // switch mode 4101 hci_power_control_off(); 4102 4103 log_info("HCI_STATE_HALTING, emitting state"); 4104 hci_emit_state(); 4105 log_info("HCI_STATE_HALTING, done"); 4106 break; 4107 4108 case HCI_HALTING_W4_TIMER: 4109 // keep waiting 4110 4111 break; 4112 default: 4113 break; 4114 } 4115 4116 break; 4117 4118 case HCI_STATE_FALLING_ASLEEP: 4119 switch(hci_stack->substate) { 4120 case HCI_FALLING_ASLEEP_DISCONNECT: 4121 log_info("HCI_STATE_FALLING_ASLEEP"); 4122 // close all open connections 4123 connection = (hci_connection_t *) hci_stack->connections; 4124 4125 #ifdef HAVE_PLATFORM_IPHONE_OS 4126 // don't close connections, if H4 supports power management 4127 if (btstack_control_iphone_power_management_enabled()){ 4128 connection = NULL; 4129 } 4130 #endif 4131 if (connection){ 4132 4133 // send disconnect 4134 if (!hci_can_send_command_packet_now()) return; 4135 4136 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4137 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4138 4139 // send disconnected event right away - causes higher layer connections to get closed, too. 4140 hci_shutdown_connection(connection); 4141 return; 4142 } 4143 4144 if (hci_classic_supported()){ 4145 // disable page and inquiry scan 4146 if (!hci_can_send_command_packet_now()) return; 4147 4148 log_info("HCI_STATE_HALTING, disabling inq scans"); 4149 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4150 4151 // continue in next sub state 4152 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4153 break; 4154 } 4155 4156 /* fall through */ 4157 4158 case HCI_FALLING_ASLEEP_COMPLETE: 4159 log_info("HCI_STATE_HALTING, calling sleep"); 4160 #ifdef HAVE_PLATFORM_IPHONE_OS 4161 // don't actually go to sleep, if H4 supports power management 4162 if (btstack_control_iphone_power_management_enabled()){ 4163 // SLEEP MODE reached 4164 hci_stack->state = HCI_STATE_SLEEPING; 4165 hci_emit_state(); 4166 break; 4167 } 4168 #endif 4169 // switch mode 4170 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4171 hci_emit_state(); 4172 break; 4173 4174 default: 4175 break; 4176 } 4177 break; 4178 4179 default: 4180 break; 4181 } 4182 } 4183 4184 int hci_send_cmd_packet(uint8_t *packet, int size){ 4185 // house-keeping 4186 4187 #ifdef ENABLE_CLASSIC 4188 bd_addr_t addr; 4189 hci_connection_t * conn; 4190 #endif 4191 #ifdef ENABLE_LE_CENTRAL 4192 uint8_t initiator_filter_policy; 4193 #endif 4194 4195 uint16_t opcode = little_endian_read_16(packet, 0); 4196 switch (opcode) { 4197 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4198 hci_stack->loopback_mode = packet[3]; 4199 break; 4200 4201 #ifdef ENABLE_CLASSIC 4202 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4203 reverse_bd_addr(&packet[3], addr); 4204 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4205 4206 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4207 if (!conn) { 4208 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4209 if (!conn) { 4210 // notify client that alloc failed 4211 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4212 return -1; // packet not sent to controller 4213 } 4214 conn->state = SEND_CREATE_CONNECTION; 4215 } 4216 log_info("conn state %u", conn->state); 4217 switch (conn->state) { 4218 // if connection active exists 4219 case OPEN: 4220 // and OPEN, emit connection complete command 4221 hci_emit_connection_complete(addr, conn->con_handle, 0); 4222 return -1; // packet not sent to controller 4223 case RECEIVED_DISCONNECTION_COMPLETE: 4224 // create connection triggered in disconnect complete event, let's do it now 4225 break; 4226 case SEND_CREATE_CONNECTION: 4227 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4228 break; 4229 default: 4230 // otherwise, just ignore as it is already in the open process 4231 return -1; // packet not sent to controller 4232 } 4233 conn->state = SENT_CREATE_CONNECTION; 4234 4235 // track outgoing connection 4236 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4237 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4238 break; 4239 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4240 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4241 break; 4242 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4243 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4244 break; 4245 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4246 if (hci_stack->link_key_db) { 4247 reverse_bd_addr(&packet[3], addr); 4248 hci_stack->link_key_db->delete_link_key(addr); 4249 } 4250 break; 4251 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4252 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4253 reverse_bd_addr(&packet[3], addr); 4254 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4255 if (conn) { 4256 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4257 } 4258 break; 4259 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4260 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4261 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4262 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4263 reverse_bd_addr(&packet[3], addr); 4264 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4265 if (conn) { 4266 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4267 } 4268 break; 4269 4270 #ifdef ENABLE_SCO_OVER_HCI 4271 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4272 // setup_synchronous_connection? Voice setting at offset 22 4273 // TODO: compare to current setting if sco connection already active 4274 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4275 break; 4276 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4277 // accept_synchronus_connection? Voice setting at offset 18 4278 // TODO: compare to current setting if sco connection already active 4279 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4280 break; 4281 #endif 4282 #endif 4283 4284 #ifdef ENABLE_BLE 4285 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4286 hci_stack->le_random_address_set = 1; 4287 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4288 break; 4289 #ifdef ENABLE_LE_PERIPHERAL 4290 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4291 hci_stack->le_advertisements_active = packet[3]; 4292 break; 4293 #endif 4294 #ifdef ENABLE_LE_CENTRAL 4295 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4296 // white list used? 4297 initiator_filter_policy = packet[7]; 4298 switch (initiator_filter_policy) { 4299 case 0: 4300 // whitelist not used 4301 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4302 break; 4303 case 1: 4304 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4305 break; 4306 default: 4307 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4308 break; 4309 } 4310 break; 4311 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4312 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4313 break; 4314 #endif 4315 #endif 4316 default: 4317 break; 4318 } 4319 4320 hci_stack->num_cmd_packets--; 4321 4322 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4323 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4324 } 4325 4326 // disconnect because of security block 4327 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4328 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4329 if (!connection) return; 4330 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4331 } 4332 4333 4334 // Configure Secure Simple Pairing 4335 4336 #ifdef ENABLE_CLASSIC 4337 4338 // enable will enable SSP during init 4339 void gap_ssp_set_enable(int enable){ 4340 hci_stack->ssp_enable = enable; 4341 } 4342 4343 static int hci_local_ssp_activated(void){ 4344 return gap_ssp_supported() && hci_stack->ssp_enable; 4345 } 4346 4347 // if set, BTstack will respond to io capability request using authentication requirement 4348 void gap_ssp_set_io_capability(int io_capability){ 4349 hci_stack->ssp_io_capability = io_capability; 4350 } 4351 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4352 hci_stack->ssp_authentication_requirement = authentication_requirement; 4353 } 4354 4355 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4356 void gap_ssp_set_auto_accept(int auto_accept){ 4357 hci_stack->ssp_auto_accept = auto_accept; 4358 } 4359 4360 void gap_secure_connections_enable(bool enable){ 4361 hci_stack->secure_connections_enable = enable; 4362 } 4363 4364 #endif 4365 4366 // va_list part of hci_send_cmd 4367 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4368 if (!hci_can_send_command_packet_now()){ 4369 log_error("hci_send_cmd called but cannot send packet now"); 4370 return 0; 4371 } 4372 4373 // for HCI INITIALIZATION 4374 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4375 hci_stack->last_cmd_opcode = cmd->opcode; 4376 4377 hci_reserve_packet_buffer(); 4378 uint8_t * packet = hci_stack->hci_packet_buffer; 4379 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4380 int err = hci_send_cmd_packet(packet, size); 4381 4382 // release packet buffer on error or for synchronous transport implementations 4383 if ((err < 0) || hci_transport_synchronous()){ 4384 hci_release_packet_buffer(); 4385 hci_emit_transport_packet_sent(); 4386 } 4387 4388 return err; 4389 } 4390 4391 /** 4392 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4393 */ 4394 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4395 va_list argptr; 4396 va_start(argptr, cmd); 4397 int res = hci_send_cmd_va_arg(cmd, argptr); 4398 va_end(argptr); 4399 return res; 4400 } 4401 4402 // Create various non-HCI events. 4403 // TODO: generalize, use table similar to hci_create_command 4404 4405 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4406 // dump packet 4407 if (dump) { 4408 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4409 } 4410 4411 // dispatch to all event handlers 4412 btstack_linked_list_iterator_t it; 4413 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4414 while (btstack_linked_list_iterator_has_next(&it)){ 4415 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4416 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4417 } 4418 } 4419 4420 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4421 if (!hci_stack->acl_packet_handler) return; 4422 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4423 } 4424 4425 #ifdef ENABLE_CLASSIC 4426 static void hci_notify_if_sco_can_send_now(void){ 4427 // notify SCO sender if waiting 4428 if (!hci_stack->sco_waiting_for_can_send_now) return; 4429 if (hci_can_send_sco_packet_now()){ 4430 hci_stack->sco_waiting_for_can_send_now = 0; 4431 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4432 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4433 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4434 } 4435 } 4436 4437 // parsing end emitting has been merged to reduce code size 4438 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4439 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4440 4441 uint8_t * eir_data; 4442 ad_context_t context; 4443 const uint8_t * name; 4444 uint8_t name_len; 4445 4446 if (size < 3) return; 4447 4448 int event_type = hci_event_packet_get_type(packet); 4449 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4450 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4451 4452 switch (event_type){ 4453 case HCI_EVENT_INQUIRY_RESULT: 4454 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4455 if (size != (3 + (num_responses * 14))) return; 4456 break; 4457 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4458 if (size != 257) return; 4459 if (num_responses != 1) return; 4460 break; 4461 default: 4462 return; 4463 } 4464 4465 // event[1] is set at the end 4466 int i; 4467 for (i=0; i<num_responses;i++){ 4468 memset(event, 0, sizeof(event)); 4469 event[0] = GAP_EVENT_INQUIRY_RESULT; 4470 uint8_t event_size = 18; // if name is not set by EIR 4471 4472 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4473 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4474 (void)memcpy(&event[9], 4475 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4476 3); // class of device 4477 (void)memcpy(&event[12], 4478 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4479 2); // clock offset 4480 4481 switch (event_type){ 4482 case HCI_EVENT_INQUIRY_RESULT: 4483 // 14,15,16,17 = 0, size 18 4484 break; 4485 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4486 event[14] = 1; 4487 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4488 // 16,17 = 0, size 18 4489 break; 4490 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4491 event[14] = 1; 4492 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4493 // EIR packets only contain a single inquiry response 4494 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4495 name = NULL; 4496 // Iterate over EIR data 4497 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4498 uint8_t data_type = ad_iterator_get_data_type(&context); 4499 uint8_t data_size = ad_iterator_get_data_len(&context); 4500 const uint8_t * data = ad_iterator_get_data(&context); 4501 // Prefer Complete Local Name over Shortend Local Name 4502 switch (data_type){ 4503 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4504 if (name) continue; 4505 /* fall through */ 4506 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4507 name = data; 4508 name_len = data_size; 4509 break; 4510 default: 4511 break; 4512 } 4513 } 4514 if (name){ 4515 event[16] = 1; 4516 // truncate name if needed 4517 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4518 event[17] = len; 4519 (void)memcpy(&event[18], name, len); 4520 event_size += len; 4521 } 4522 break; 4523 } 4524 event[1] = event_size - 2; 4525 hci_emit_event(event, event_size, 1); 4526 } 4527 } 4528 #endif 4529 4530 void hci_emit_state(void){ 4531 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4532 uint8_t event[3]; 4533 event[0] = BTSTACK_EVENT_STATE; 4534 event[1] = sizeof(event) - 2u; 4535 event[2] = hci_stack->state; 4536 hci_emit_event(event, sizeof(event), 1); 4537 } 4538 4539 #ifdef ENABLE_CLASSIC 4540 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4541 uint8_t event[13]; 4542 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4543 event[1] = sizeof(event) - 2; 4544 event[2] = status; 4545 little_endian_store_16(event, 3, con_handle); 4546 reverse_bd_addr(address, &event[5]); 4547 event[11] = 1; // ACL connection 4548 event[12] = 0; // encryption disabled 4549 hci_emit_event(event, sizeof(event), 1); 4550 } 4551 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4552 if (disable_l2cap_timeouts) return; 4553 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4554 uint8_t event[4]; 4555 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4556 event[1] = sizeof(event) - 2; 4557 little_endian_store_16(event, 2, conn->con_handle); 4558 hci_emit_event(event, sizeof(event), 1); 4559 } 4560 #endif 4561 4562 #ifdef ENABLE_BLE 4563 #ifdef ENABLE_LE_CENTRAL 4564 static void hci_emit_le_connection_complete(uint8_t address_type, bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4565 uint8_t event[21]; 4566 event[0] = HCI_EVENT_LE_META; 4567 event[1] = sizeof(event) - 2u; 4568 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4569 event[3] = status; 4570 little_endian_store_16(event, 4, con_handle); 4571 event[6] = 0; // TODO: role 4572 event[7] = address_type; 4573 reverse_bd_addr(address, &event[8]); 4574 little_endian_store_16(event, 14, 0); // interval 4575 little_endian_store_16(event, 16, 0); // latency 4576 little_endian_store_16(event, 18, 0); // supervision timeout 4577 event[20] = 0; // master clock accuracy 4578 hci_emit_event(event, sizeof(event), 1); 4579 } 4580 #endif 4581 #endif 4582 4583 static void hci_emit_transport_packet_sent(void){ 4584 // notify upper stack that it might be possible to send again 4585 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4586 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4587 } 4588 4589 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4590 uint8_t event[6]; 4591 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4592 event[1] = sizeof(event) - 2u; 4593 event[2] = 0; // status = OK 4594 little_endian_store_16(event, 3, con_handle); 4595 event[5] = reason; 4596 hci_emit_event(event, sizeof(event), 1); 4597 } 4598 4599 static void hci_emit_nr_connections_changed(void){ 4600 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4601 uint8_t event[3]; 4602 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4603 event[1] = sizeof(event) - 2u; 4604 event[2] = nr_hci_connections(); 4605 hci_emit_event(event, sizeof(event), 1); 4606 } 4607 4608 static void hci_emit_hci_open_failed(void){ 4609 log_info("BTSTACK_EVENT_POWERON_FAILED"); 4610 uint8_t event[2]; 4611 event[0] = BTSTACK_EVENT_POWERON_FAILED; 4612 event[1] = sizeof(event) - 2u; 4613 hci_emit_event(event, sizeof(event), 1); 4614 } 4615 4616 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 4617 log_info("hci_emit_dedicated_bonding_result %u ", status); 4618 uint8_t event[9]; 4619 int pos = 0; 4620 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 4621 event[pos++] = sizeof(event) - 2u; 4622 event[pos++] = status; 4623 reverse_bd_addr(address, &event[pos]); 4624 hci_emit_event(event, sizeof(event), 1); 4625 } 4626 4627 4628 #ifdef ENABLE_CLASSIC 4629 4630 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 4631 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 4632 uint8_t event[5]; 4633 int pos = 0; 4634 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 4635 event[pos++] = sizeof(event) - 2; 4636 little_endian_store_16(event, 2, con_handle); 4637 pos += 2; 4638 event[pos++] = level; 4639 hci_emit_event(event, sizeof(event), 1); 4640 } 4641 4642 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 4643 if (!connection) return LEVEL_0; 4644 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 4645 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 4646 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 4647 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 4648 // LEVEL 4 always requires 128 bit encrytion key size 4649 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 4650 security_level = LEVEL_3; 4651 } 4652 return security_level; 4653 } 4654 4655 static void hci_emit_discoverable_enabled(uint8_t enabled){ 4656 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 4657 uint8_t event[3]; 4658 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 4659 event[1] = sizeof(event) - 2; 4660 event[2] = enabled; 4661 hci_emit_event(event, sizeof(event), 1); 4662 } 4663 4664 // query if remote side supports eSCO 4665 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 4666 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4667 if (!connection) return 0; 4668 return (connection->remote_supported_features[0] & 1) != 0; 4669 } 4670 4671 static bool hci_ssp_supported(hci_connection_t * connection){ 4672 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 4673 return (connection->bonding_flags & mask) == mask; 4674 } 4675 4676 // query if remote side supports SSP 4677 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 4678 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4679 if (!connection) return 0; 4680 return hci_ssp_supported(connection) ? 1 : 0; 4681 } 4682 4683 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 4684 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 4685 } 4686 4687 // GAP API 4688 /** 4689 * @bbrief enable/disable bonding. default is enabled 4690 * @praram enabled 4691 */ 4692 void gap_set_bondable_mode(int enable){ 4693 hci_stack->bondable = enable ? 1 : 0; 4694 } 4695 /** 4696 * @brief Get bondable mode. 4697 * @return 1 if bondable 4698 */ 4699 int gap_get_bondable_mode(void){ 4700 return hci_stack->bondable; 4701 } 4702 4703 /** 4704 * @brief map link keys to security levels 4705 */ 4706 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 4707 switch (link_key_type){ 4708 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4709 return LEVEL_4; 4710 case COMBINATION_KEY: 4711 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4712 return LEVEL_3; 4713 default: 4714 return LEVEL_2; 4715 } 4716 } 4717 4718 /** 4719 * @brief map link keys to secure connection yes/no 4720 */ 4721 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 4722 switch (link_key_type){ 4723 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4724 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4725 return 1; 4726 default: 4727 return 0; 4728 } 4729 } 4730 4731 /** 4732 * @brief map link keys to authenticated 4733 */ 4734 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 4735 switch (link_key_type){ 4736 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 4737 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 4738 return 1; 4739 default: 4740 return 0; 4741 } 4742 } 4743 4744 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 4745 log_info("gap_mitm_protection_required_for_security_level %u", level); 4746 return level > LEVEL_2; 4747 } 4748 4749 /** 4750 * @brief get current security level 4751 */ 4752 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 4753 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4754 if (!connection) return LEVEL_0; 4755 return gap_security_level_for_connection(connection); 4756 } 4757 4758 /** 4759 * @brief request connection to device to 4760 * @result GAP_AUTHENTICATION_RESULT 4761 */ 4762 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 4763 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4764 if (!connection){ 4765 hci_emit_security_level(con_handle, LEVEL_0); 4766 return; 4767 } 4768 gap_security_level_t current_level = gap_security_level(con_handle); 4769 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 4770 requested_level, connection->requested_security_level, current_level); 4771 4772 // assumption: earlier requested security higher than current level => security request is active 4773 if (current_level < connection->requested_security_level){ 4774 if (connection->requested_security_level < requested_level){ 4775 // increase requested level as new level is higher 4776 4777 // TODO: handle re-authentication when done 4778 4779 connection->requested_security_level = requested_level; 4780 } 4781 return; 4782 } 4783 4784 // no request active, notify if security sufficient 4785 if (requested_level <= current_level){ 4786 hci_emit_security_level(con_handle, current_level); 4787 return; 4788 } 4789 4790 // start pairing to increase security level 4791 connection->requested_security_level = requested_level; 4792 4793 #if 0 4794 // sending encryption request without a link key results in an error. 4795 // TODO: figure out how to use it properly 4796 4797 // would enabling ecnryption suffice (>= LEVEL_2)? 4798 if (hci_stack->link_key_db){ 4799 link_key_type_t link_key_type; 4800 link_key_t link_key; 4801 if (hci_stack->link_key_db->get_link_key( &connection->address, &link_key, &link_key_type)){ 4802 if (gap_security_level_for_link_key_type(link_key_type) >= requested_level){ 4803 connection->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 4804 return; 4805 } 4806 } 4807 } 4808 #endif 4809 4810 // start to authenticate connection if not already active 4811 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 4812 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 4813 hci_run(); 4814 } 4815 4816 /** 4817 * @brief start dedicated bonding with device. disconnect after bonding 4818 * @param device 4819 * @param request MITM protection 4820 * @result GAP_DEDICATED_BONDING_COMPLETE 4821 */ 4822 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 4823 4824 // create connection state machine 4825 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 4826 4827 if (!connection){ 4828 return BTSTACK_MEMORY_ALLOC_FAILED; 4829 } 4830 4831 // delete linkn key 4832 gap_drop_link_key_for_bd_addr(device); 4833 4834 // configure LEVEL_2/3, dedicated bonding 4835 connection->state = SEND_CREATE_CONNECTION; 4836 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 4837 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 4838 connection->bonding_flags = BONDING_DEDICATED; 4839 4840 // wait for GAP Security Result and send GAP Dedicated Bonding complete 4841 4842 // handle: connnection failure (connection complete != ok) 4843 // handle: authentication failure 4844 // handle: disconnect on done 4845 4846 hci_run(); 4847 4848 return 0; 4849 } 4850 #endif 4851 4852 void gap_set_local_name(const char * local_name){ 4853 hci_stack->local_name = local_name; 4854 } 4855 4856 4857 #ifdef ENABLE_BLE 4858 4859 #ifdef ENABLE_LE_CENTRAL 4860 void gap_start_scan(void){ 4861 hci_stack->le_scanning_enabled = 1; 4862 hci_run(); 4863 } 4864 4865 void gap_stop_scan(void){ 4866 hci_stack->le_scanning_enabled = 0; 4867 hci_run(); 4868 } 4869 4870 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 4871 hci_stack->le_scan_type = scan_type; 4872 hci_stack->le_scan_interval = scan_interval; 4873 hci_stack->le_scan_window = scan_window; 4874 hci_run(); 4875 } 4876 4877 uint8_t gap_connect(bd_addr_t addr, bd_addr_type_t addr_type){ 4878 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 4879 if (!conn){ 4880 log_info("gap_connect: no connection exists yet, creating context"); 4881 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 4882 if (!conn){ 4883 // notify client that alloc failed 4884 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4885 log_info("gap_connect: failed to alloc hci_connection_t"); 4886 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 4887 } 4888 conn->state = SEND_CREATE_CONNECTION; 4889 log_info("gap_connect: send create connection next"); 4890 hci_run(); 4891 return ERROR_CODE_SUCCESS; 4892 } 4893 4894 if (!hci_is_le_connection(conn) || 4895 (conn->state == SEND_CREATE_CONNECTION) || 4896 (conn->state == SENT_CREATE_CONNECTION)) { 4897 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 4898 log_error("gap_connect: classic connection or connect is already being created"); 4899 return GATT_CLIENT_IN_WRONG_STATE; 4900 } 4901 4902 // check if connection was just disconnected 4903 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4904 log_info("gap_connect: send create connection (again)"); 4905 conn->state = SEND_CREATE_CONNECTION; 4906 hci_run(); 4907 return ERROR_CODE_SUCCESS; 4908 } 4909 4910 log_info("gap_connect: context exists with state %u", conn->state); 4911 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, 0); 4912 hci_run(); 4913 return ERROR_CODE_SUCCESS; 4914 } 4915 4916 // @assumption: only a single outgoing LE Connection exists 4917 static hci_connection_t * gap_get_outgoing_connection(void){ 4918 btstack_linked_item_t *it; 4919 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4920 hci_connection_t * conn = (hci_connection_t *) it; 4921 if (!hci_is_le_connection(conn)) continue; 4922 switch (conn->state){ 4923 case SEND_CREATE_CONNECTION: 4924 case SENT_CREATE_CONNECTION: 4925 case SENT_CANCEL_CONNECTION: 4926 return conn; 4927 default: 4928 break; 4929 }; 4930 } 4931 return NULL; 4932 } 4933 4934 uint8_t gap_connect_cancel(void){ 4935 hci_connection_t * conn = gap_get_outgoing_connection(); 4936 if (!conn) return 0; 4937 switch (conn->state){ 4938 case SEND_CREATE_CONNECTION: 4939 // skip sending create connection and emit event instead 4940 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 4941 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 4942 btstack_memory_hci_connection_free( conn ); 4943 break; 4944 case SENT_CREATE_CONNECTION: 4945 // request to send cancel connection 4946 conn->state = SEND_CANCEL_CONNECTION; 4947 hci_run(); 4948 break; 4949 default: 4950 break; 4951 } 4952 return 0; 4953 } 4954 #endif 4955 4956 #ifdef ENABLE_LE_CENTRAL 4957 /** 4958 * @brief Set connection parameters for outgoing connections 4959 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 4960 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 4961 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 4962 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 4963 * @param conn_latency, default: 4 4964 * @param supervision_timeout (unit: 10ms), default: 720 ms 4965 * @param min_ce_length (unit: 0.625ms), default: 10 ms 4966 * @param max_ce_length (unit: 0.625ms), default: 30 ms 4967 */ 4968 4969 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 4970 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 4971 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 4972 hci_stack->le_connection_scan_interval = conn_scan_interval; 4973 hci_stack->le_connection_scan_window = conn_scan_window; 4974 hci_stack->le_connection_interval_min = conn_interval_min; 4975 hci_stack->le_connection_interval_max = conn_interval_max; 4976 hci_stack->le_connection_latency = conn_latency; 4977 hci_stack->le_supervision_timeout = supervision_timeout; 4978 hci_stack->le_minimum_ce_length = min_ce_length; 4979 hci_stack->le_maximum_ce_length = max_ce_length; 4980 } 4981 #endif 4982 4983 /** 4984 * @brief Updates the connection parameters for a given LE connection 4985 * @param handle 4986 * @param conn_interval_min (unit: 1.25ms) 4987 * @param conn_interval_max (unit: 1.25ms) 4988 * @param conn_latency 4989 * @param supervision_timeout (unit: 10ms) 4990 * @returns 0 if ok 4991 */ 4992 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 4993 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 4994 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4995 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 4996 connection->le_conn_interval_min = conn_interval_min; 4997 connection->le_conn_interval_max = conn_interval_max; 4998 connection->le_conn_latency = conn_latency; 4999 connection->le_supervision_timeout = supervision_timeout; 5000 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5001 hci_run(); 5002 return 0; 5003 } 5004 5005 /** 5006 * @brief Request an update of the connection parameter for a given LE connection 5007 * @param handle 5008 * @param conn_interval_min (unit: 1.25ms) 5009 * @param conn_interval_max (unit: 1.25ms) 5010 * @param conn_latency 5011 * @param supervision_timeout (unit: 10ms) 5012 * @returns 0 if ok 5013 */ 5014 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5015 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5016 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5017 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5018 connection->le_conn_interval_min = conn_interval_min; 5019 connection->le_conn_interval_max = conn_interval_max; 5020 connection->le_conn_latency = conn_latency; 5021 connection->le_supervision_timeout = supervision_timeout; 5022 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5023 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5024 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5025 return 0; 5026 } 5027 5028 #ifdef ENABLE_LE_PERIPHERAL 5029 5030 static void gap_advertisments_changed(void){ 5031 // disable advertisements before updating adv, scan data, or adv params 5032 if (hci_stack->le_advertisements_active){ 5033 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE | LE_ADVERTISEMENT_TASKS_ENABLE; 5034 } 5035 hci_run(); 5036 } 5037 5038 /** 5039 * @brief Set Advertisement Data 5040 * @param advertising_data_length 5041 * @param advertising_data (max 31 octets) 5042 * @note data is not copied, pointer has to stay valid 5043 */ 5044 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5045 hci_stack->le_advertisements_data_len = advertising_data_length; 5046 hci_stack->le_advertisements_data = advertising_data; 5047 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5048 gap_advertisments_changed(); 5049 } 5050 5051 /** 5052 * @brief Set Scan Response Data 5053 * @param advertising_data_length 5054 * @param advertising_data (max 31 octets) 5055 * @note data is not copied, pointer has to stay valid 5056 */ 5057 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5058 hci_stack->le_scan_response_data_len = scan_response_data_length; 5059 hci_stack->le_scan_response_data = scan_response_data; 5060 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5061 gap_advertisments_changed(); 5062 } 5063 5064 /** 5065 * @brief Set Advertisement Parameters 5066 * @param adv_int_min 5067 * @param adv_int_max 5068 * @param adv_type 5069 * @param direct_address_type 5070 * @param direct_address 5071 * @param channel_map 5072 * @param filter_policy 5073 * 5074 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5075 */ 5076 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5077 uint8_t direct_address_typ, bd_addr_t direct_address, 5078 uint8_t channel_map, uint8_t filter_policy) { 5079 5080 hci_stack->le_advertisements_interval_min = adv_int_min; 5081 hci_stack->le_advertisements_interval_max = adv_int_max; 5082 hci_stack->le_advertisements_type = adv_type; 5083 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5084 hci_stack->le_advertisements_channel_map = channel_map; 5085 hci_stack->le_advertisements_filter_policy = filter_policy; 5086 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5087 6); 5088 5089 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5090 gap_advertisments_changed(); 5091 } 5092 5093 /** 5094 * @brief Enable/Disable Advertisements 5095 * @param enabled 5096 */ 5097 void gap_advertisements_enable(int enabled){ 5098 hci_stack->le_advertisements_enabled = enabled; 5099 if (enabled && !hci_stack->le_advertisements_active){ 5100 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_ENABLE; 5101 } 5102 if (!enabled && hci_stack->le_advertisements_active){ 5103 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_DISABLE; 5104 } 5105 hci_run(); 5106 } 5107 5108 #endif 5109 5110 void hci_le_set_own_address_type(uint8_t own_address_type){ 5111 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5112 if (own_address_type == hci_stack->le_own_addr_type) return; 5113 hci_stack->le_own_addr_type = own_address_type; 5114 5115 #ifdef ENABLE_LE_PERIPHERAL 5116 // update advertisement parameters, too 5117 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5118 gap_advertisments_changed(); 5119 #endif 5120 #ifdef ENABLE_LE_CENTRAL 5121 // note: we don't update scan parameters or modify ongoing connection attempts 5122 #endif 5123 } 5124 5125 #endif 5126 5127 uint8_t gap_disconnect(hci_con_handle_t handle){ 5128 hci_connection_t * conn = hci_connection_for_handle(handle); 5129 if (!conn){ 5130 hci_emit_disconnection_complete(handle, 0); 5131 return 0; 5132 } 5133 // ignore if already disconnected 5134 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5135 return 0; 5136 } 5137 conn->state = SEND_DISCONNECT; 5138 hci_run(); 5139 return 0; 5140 } 5141 5142 int gap_read_rssi(hci_con_handle_t con_handle){ 5143 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5144 if (hci_connection == NULL) return 0; 5145 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5146 hci_run(); 5147 return 1; 5148 } 5149 5150 /** 5151 * @brief Get connection type 5152 * @param con_handle 5153 * @result connection_type 5154 */ 5155 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5156 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5157 if (!conn) return GAP_CONNECTION_INVALID; 5158 switch (conn->address_type){ 5159 case BD_ADDR_TYPE_LE_PUBLIC: 5160 case BD_ADDR_TYPE_LE_RANDOM: 5161 return GAP_CONNECTION_LE; 5162 case BD_ADDR_TYPE_SCO: 5163 return GAP_CONNECTION_SCO; 5164 case BD_ADDR_TYPE_ACL: 5165 return GAP_CONNECTION_ACL; 5166 default: 5167 return GAP_CONNECTION_INVALID; 5168 } 5169 } 5170 5171 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5172 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5173 if (!conn) return HCI_ROLE_INVALID; 5174 return (hci_role_t) conn->role; 5175 } 5176 5177 5178 #ifdef ENABLE_BLE 5179 5180 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){ 5181 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5182 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5183 5184 conn->le_phy_update_all_phys = all_phys; 5185 conn->le_phy_update_tx_phys = tx_phys; 5186 conn->le_phy_update_rx_phys = rx_phys; 5187 conn->le_phy_update_phy_options = phy_options; 5188 5189 hci_run(); 5190 5191 return 0; 5192 } 5193 5194 #ifdef ENABLE_LE_CENTRAL 5195 /** 5196 * @brief Auto Connection Establishment - Start Connecting to device 5197 * @param address_typ 5198 * @param address 5199 * @returns 0 if ok 5200 */ 5201 int gap_auto_connection_start(bd_addr_type_t address_type, bd_addr_t address){ 5202 // check capacity 5203 int num_entries = btstack_linked_list_count(&hci_stack->le_whitelist); 5204 if (num_entries >= hci_stack->le_whitelist_capacity) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 5205 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5206 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5207 entry->address_type = address_type; 5208 (void)memcpy(entry->address, address, 6); 5209 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5210 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5211 hci_run(); 5212 return 0; 5213 } 5214 5215 static void hci_remove_from_whitelist(bd_addr_type_t address_type, bd_addr_t address){ 5216 btstack_linked_list_iterator_t it; 5217 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5218 while (btstack_linked_list_iterator_has_next(&it)){ 5219 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5220 if (entry->address_type != address_type) continue; 5221 if (memcmp(entry->address, address, 6) != 0) continue; 5222 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5223 // remove from controller if already present 5224 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5225 continue; 5226 } 5227 // direclty remove entry from whitelist 5228 btstack_linked_list_iterator_remove(&it); 5229 btstack_memory_whitelist_entry_free(entry); 5230 } 5231 } 5232 5233 /** 5234 * @brief Auto Connection Establishment - Stop Connecting to device 5235 * @param address_typ 5236 * @param address 5237 * @returns 0 if ok 5238 */ 5239 int gap_auto_connection_stop(bd_addr_type_t address_type, bd_addr_t address){ 5240 hci_remove_from_whitelist(address_type, address); 5241 hci_run(); 5242 return 0; 5243 } 5244 5245 /** 5246 * @brief Auto Connection Establishment - Stop everything 5247 * @note Convenience function to stop all active auto connection attempts 5248 */ 5249 void gap_auto_connection_stop_all(void){ 5250 btstack_linked_list_iterator_t it; 5251 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5252 while (btstack_linked_list_iterator_has_next(&it)){ 5253 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5254 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5255 // remove from controller if already present 5256 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5257 continue; 5258 } 5259 // directly remove entry from whitelist 5260 btstack_linked_list_iterator_remove(&it); 5261 btstack_memory_whitelist_entry_free(entry); 5262 } 5263 hci_run(); 5264 } 5265 5266 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5267 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5268 if (!conn) return 0; 5269 return conn->le_connection_interval; 5270 } 5271 #endif 5272 #endif 5273 5274 #ifdef ENABLE_CLASSIC 5275 /** 5276 * @brief Set Extended Inquiry Response data 5277 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5278 * @note has to be done before stack starts up 5279 */ 5280 void gap_set_extended_inquiry_response(const uint8_t * data){ 5281 hci_stack->eir_data = data; 5282 } 5283 5284 /** 5285 * @brief Start GAP Classic Inquiry 5286 * @param duration in 1.28s units 5287 * @return 0 if ok 5288 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5289 */ 5290 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5291 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5292 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5293 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5294 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5295 } 5296 hci_stack->inquiry_state = duration_in_1280ms_units; 5297 hci_run(); 5298 return 0; 5299 } 5300 5301 /** 5302 * @brief Stop GAP Classic Inquiry 5303 * @returns 0 if ok 5304 */ 5305 int gap_inquiry_stop(void){ 5306 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5307 // emit inquiry complete event, before it even started 5308 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5309 hci_emit_event(event, sizeof(event), 1); 5310 return 0; 5311 } 5312 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5313 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5314 hci_run(); 5315 return 0; 5316 } 5317 5318 5319 /** 5320 * @brief Remote Name Request 5321 * @param addr 5322 * @param page_scan_repetition_mode 5323 * @param clock_offset only used when bit 15 is set 5324 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5325 */ 5326 int gap_remote_name_request(bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5327 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5328 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5329 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5330 hci_stack->remote_name_clock_offset = clock_offset; 5331 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5332 hci_run(); 5333 return 0; 5334 } 5335 5336 static int gap_pairing_set_state_and_run(bd_addr_t addr, uint8_t state){ 5337 hci_stack->gap_pairing_state = state; 5338 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5339 hci_run(); 5340 return 0; 5341 } 5342 5343 /** 5344 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5345 * @param addr 5346 * @param pin_data 5347 * @param pin_len 5348 * @return 0 if ok 5349 */ 5350 int gap_pin_code_response_binary(bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5351 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5352 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5353 hci_stack->gap_pairing_pin_len = pin_len; 5354 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5355 } 5356 5357 /** 5358 * @brief Legacy Pairing Pin Code Response 5359 * @param addr 5360 * @param pin 5361 * @return 0 if ok 5362 */ 5363 int gap_pin_code_response(bd_addr_t addr, const char * pin){ 5364 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5365 } 5366 5367 /** 5368 * @brief Abort Legacy Pairing 5369 * @param addr 5370 * @param pin 5371 * @return 0 if ok 5372 */ 5373 int gap_pin_code_negative(bd_addr_t addr){ 5374 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5375 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5376 } 5377 5378 /** 5379 * @brief SSP Passkey Response 5380 * @param addr 5381 * @param passkey 5382 * @return 0 if ok 5383 */ 5384 int gap_ssp_passkey_response(bd_addr_t addr, uint32_t passkey){ 5385 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5386 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5387 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5388 } 5389 5390 /** 5391 * @brief Abort SSP Passkey Entry/Pairing 5392 * @param addr 5393 * @param pin 5394 * @return 0 if ok 5395 */ 5396 int gap_ssp_passkey_negative(bd_addr_t addr){ 5397 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5398 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5399 } 5400 5401 /** 5402 * @brief Accept SSP Numeric Comparison 5403 * @param addr 5404 * @param passkey 5405 * @return 0 if ok 5406 */ 5407 int gap_ssp_confirmation_response(bd_addr_t addr){ 5408 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5409 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5410 } 5411 5412 /** 5413 * @brief Abort SSP Numeric Comparison/Pairing 5414 * @param addr 5415 * @param pin 5416 * @return 0 if ok 5417 */ 5418 int gap_ssp_confirmation_negative(bd_addr_t addr){ 5419 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5420 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5421 } 5422 5423 /** 5424 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5425 * @param inquiry_mode see bluetooth_defines.h 5426 */ 5427 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5428 hci_stack->inquiry_mode = mode; 5429 } 5430 5431 /** 5432 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5433 */ 5434 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5435 hci_stack->sco_voice_setting = voice_setting; 5436 } 5437 5438 /** 5439 * @brief Get SCO Voice Setting 5440 * @return current voice setting 5441 */ 5442 uint16_t hci_get_sco_voice_setting(void){ 5443 return hci_stack->sco_voice_setting; 5444 } 5445 5446 static int hci_have_usb_transport(void){ 5447 if (!hci_stack->hci_transport) return 0; 5448 const char * transport_name = hci_stack->hci_transport->name; 5449 if (!transport_name) return 0; 5450 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5451 } 5452 5453 /** @brief Get SCO packet length for current SCO Voice setting 5454 * @note Using SCO packets of the exact length is required for USB transfer 5455 * @return Length of SCO packets in bytes (not audio frames) 5456 */ 5457 int hci_get_sco_packet_length(void){ 5458 int sco_packet_length = 0; 5459 5460 #ifdef ENABLE_SCO_OVER_HCI 5461 5462 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5463 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5464 5465 if (hci_have_usb_transport()){ 5466 // see Core Spec for H2 USB Transfer. 5467 // 3 byte SCO header + 24 bytes per connection 5468 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5469 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5470 } else { 5471 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5472 sco_packet_length = 3 + 60 * multiplier; 5473 // assert that it still fits inside an SCO buffer 5474 if (sco_packet_length > hci_stack->sco_data_packet_length){ 5475 sco_packet_length = 3 + 60; 5476 } 5477 } 5478 #endif 5479 return sco_packet_length; 5480 } 5481 5482 /** 5483 * @brief Sets the master/slave policy 5484 * @param policy (0: attempt to become master, 1: let connecting device decide) 5485 */ 5486 void hci_set_master_slave_policy(uint8_t policy){ 5487 hci_stack->master_slave_policy = policy; 5488 } 5489 5490 #endif 5491 5492 HCI_STATE hci_get_state(void){ 5493 return hci_stack->state; 5494 } 5495 5496 #ifdef ENABLE_CLASSIC 5497 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr)){ 5498 hci_stack->gap_classic_accept_callback = accept_callback; 5499 } 5500 #endif 5501 5502 /** 5503 * @brief Set callback for Bluetooth Hardware Error 5504 */ 5505 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 5506 hci_stack->hardware_error_callback = fn; 5507 } 5508 5509 void hci_disconnect_all(void){ 5510 btstack_linked_list_iterator_t it; 5511 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5512 while (btstack_linked_list_iterator_has_next(&it)){ 5513 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5514 if (con->state == SENT_DISCONNECT) continue; 5515 con->state = SEND_DISCONNECT; 5516 } 5517 hci_run(); 5518 } 5519 5520 uint16_t hci_get_manufacturer(void){ 5521 return hci_stack->manufacturer; 5522 } 5523 5524 #ifdef ENABLE_BLE 5525 5526 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 5527 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 5528 if (!hci_con) return NULL; 5529 return &hci_con->sm_connection; 5530 } 5531 5532 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 5533 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 5534 5535 int gap_encryption_key_size(hci_con_handle_t con_handle){ 5536 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5537 if (hci_connection == NULL) return 0; 5538 if (hci_is_le_connection(hci_connection)){ 5539 sm_connection_t * sm_conn = &hci_connection->sm_connection; 5540 if (sm_conn->sm_connection_encrypted) { 5541 return sm_conn->sm_actual_encryption_key_size; 5542 } 5543 } 5544 #ifdef ENABLE_CLASSIC 5545 else { 5546 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 5547 return hci_connection->encryption_key_size; 5548 } 5549 } 5550 #endif 5551 return 0; 5552 } 5553 5554 int gap_authenticated(hci_con_handle_t con_handle){ 5555 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5556 if (hci_connection == NULL) return 0; 5557 5558 switch (hci_connection->address_type){ 5559 case BD_ADDR_TYPE_LE_PUBLIC: 5560 case BD_ADDR_TYPE_LE_RANDOM: 5561 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5562 return hci_connection->sm_connection.sm_connection_authenticated; 5563 #ifdef ENABLE_CLASSIC 5564 case BD_ADDR_TYPE_SCO: 5565 case BD_ADDR_TYPE_ACL: 5566 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 5567 #endif 5568 default: 5569 return 0; 5570 } 5571 } 5572 5573 int gap_secure_connection(hci_con_handle_t con_handle){ 5574 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5575 if (hci_connection == NULL) return 0; 5576 5577 switch (hci_connection->address_type){ 5578 case BD_ADDR_TYPE_LE_PUBLIC: 5579 case BD_ADDR_TYPE_LE_RANDOM: 5580 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 5581 return hci_connection->sm_connection.sm_connection_sc; 5582 #ifdef ENABLE_CLASSIC 5583 case BD_ADDR_TYPE_SCO: 5584 case BD_ADDR_TYPE_ACL: 5585 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 5586 #endif 5587 default: 5588 return 0; 5589 } 5590 } 5591 5592 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 5593 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 5594 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 5595 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 5596 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 5597 return sm_conn->sm_connection_authorization_state; 5598 } 5599 #endif 5600 5601 #ifdef ENABLE_CLASSIC 5602 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){ 5603 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5604 if (!conn) return GAP_CONNECTION_INVALID; 5605 conn->sniff_min_interval = sniff_min_interval; 5606 conn->sniff_max_interval = sniff_max_interval; 5607 conn->sniff_attempt = sniff_attempt; 5608 conn->sniff_timeout = sniff_timeout; 5609 hci_run(); 5610 return 0; 5611 } 5612 5613 /** 5614 * @brief Exit Sniff mode 5615 * @param con_handle 5616 @ @return 0 if ok 5617 */ 5618 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 5619 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5620 if (!conn) return GAP_CONNECTION_INVALID; 5621 conn->sniff_min_interval = 0xffff; 5622 hci_run(); 5623 return 0; 5624 } 5625 #endif 5626 5627 void hci_halting_defer(void){ 5628 if (hci_stack->state != HCI_STATE_HALTING) return; 5629 switch (hci_stack->substate){ 5630 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5631 case HCI_HALTING_CLOSE: 5632 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 5633 break; 5634 default: 5635 break; 5636 } 5637 } 5638 5639 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 5640 void hci_setup_test_connections_fuzz(void){ 5641 hci_connection_t * conn; 5642 5643 // default address: 66:55:44:33:00:01 5644 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 5645 5646 // setup Controller info 5647 hci_stack->num_cmd_packets = 255; 5648 hci_stack->acl_packets_total_num = 255; 5649 5650 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 5651 addr[5] = 0x01; 5652 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 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 incoming Classic SCO connection with con handle 0x0002 5659 addr[5] = 0x02; 5660 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 5661 conn->con_handle = addr[5]; 5662 conn->role = HCI_ROLE_SLAVE; 5663 conn->state = RECEIVED_CONNECTION_REQUEST; 5664 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5665 5666 // setup ready Classic ACL connection with con handle 0x0003 5667 addr[5] = 0x03; 5668 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 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 Classic SCO connection with con handle 0x0004 5675 addr[5] = 0x04; 5676 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 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 // setup ready LE ACL connection with con handle 0x005 and public address 5683 addr[5] = 0x05; 5684 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 5685 conn->con_handle = addr[5]; 5686 conn->role = HCI_ROLE_SLAVE; 5687 conn->state = OPEN; 5688 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 5689 } 5690 5691 void hci_free_connections_fuzz(void){ 5692 btstack_linked_list_iterator_t it; 5693 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 5694 while (btstack_linked_list_iterator_has_next(&it)){ 5695 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 5696 btstack_linked_list_iterator_remove(&it); 5697 btstack_memory_hci_connection_free(con); 5698 } 5699 } 5700 void hci_simulate_working_fuzz(void){ 5701 hci_init_done(); 5702 hci_stack->num_cmd_packets = 255; 5703 } 5704 #endif 5705